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 #ifndef RQ_PATHLEN
  48 #define RQ_PATHLEN 1024
  49 #endif
  50
  51 #ifdef HAVE_GETQUOTA_RSLT_GETQUOTA_RSLT_U
  52 #define GQR_RQUOTA getquota_rslt_u.gqr_rquota
  53 #define GQR_STATUS status
  54 #else
  55 #define GQR_RQUOTA gqr_rquota
  56 #define GQR_STATUS gqr_status
  57 #endif
  58
  59 static int my_xdr_getquota_args(XDR *xdrsp, struct getquota_args *args)
  60 {
  61         if (!xdr_string(xdrsp, &args->gqa_pathp, RQ_PATHLEN ))
  62                 return(0);
  63         if (!xdr_int(xdrsp, &args->gqa_uid))
  64                 return(0);
  65         return (1);
  66 }
  67
  68 static int my_xdr_getquota_rslt(XDR *xdrsp, struct getquota_rslt *gqr)
  69 {
  70         int quotastat;
  71
  72         if (!xdr_int(xdrsp, &quotastat)) {
  73                 DEBUG(6,("nfs_quotas: Status bad or zero\n"));
  74                 return 0;
  75         }
  76         gqr->GQR_STATUS = quotastat;
  77
  78         if (!xdr_int(xdrsp, &gqr->GQR_RQUOTA.rq_bsize)) {
  79                 DEBUG(6,("nfs_quotas: Block size bad or zero\n"));
  80                 return 0;
  81         }
  82         if (!xdr_bool(xdrsp, &gqr->GQR_RQUOTA.rq_active)) {
  83                 DEBUG(6,("nfs_quotas: Active bad or zero\n"));
  84                 return 0;
  85         }
  86         if (!xdr_int(xdrsp, (int *)&gqr->GQR_RQUOTA.rq_bhardlimit)) {
  87                 DEBUG(6,("nfs_quotas: Hardlimit bad or zero\n"));
  88                 return 0;
  89         }
  90         if (!xdr_int(xdrsp, (int *)&gqr->GQR_RQUOTA.rq_bsoftlimit)) {
  91                 DEBUG(6,("nfs_quotas: Softlimit bad or zero\n"));
  92                 return 0;
  93         }
  94         if (!xdr_int(xdrsp, (int *)&gqr->GQR_RQUOTA.rq_curblocks)) {
  95                 DEBUG(6,("nfs_quotas: Currentblocks bad or zero\n"));
  96                 return 0;
  97         }
  98         return (1);
  99 }
 100
 101
 102 int sys_get_nfs_quota(const char *path, const char *bdev,
 103                       enum SMB_QUOTA_TYPE qtype,
 104                       unid_t id, SMB_DISK_QUOTA *dp)
 105 {
 106         CLIENT *clnt = NULL;
 107         struct getquota_rslt gq_rslt;
 108         struct getquota_args gq_args;
 109         const char *mnttype;
 110         char *cutstr, *host, *testpath;
 111         int len;
 112         static struct timeval timeout = {2,0};
 113         enum clnt_stat clnt_stat;
 114
 115         int ret = -1;
 116         uint32 qflags = 0;
 117
 118         if (!path || !bdev || !dp) {
 119                 smb_panic("sys_get_nfs_quota: called with NULL pointer");
 120         }
 121
 122         DEBUG(10, ("sys_get_nfs_quota: path[%s] bdev[%s] qtype[%d]\n",
 123                    path, bdev, qtype));
 124
 125         ZERO_STRUCT(*dp);
 126
 127         dp->qtype = qtype;
 128
 129         if (qtype != SMB_USER_QUOTA_TYPE) {
 130                 DEBUG(3, ("sys_get_nfs_quota: got unsupported quota type '%d', "
 131                           "only supported type is '%d' (SMB_USER_QUOTA_TYPE)\n",
 132                           qtype, SMB_USER_QUOTA_TYPE));
 133                 errno = ENOSYS;
 134                 return -1;
 135         }
 136
 137         mnttype = bdev;
 138         len = strcspn(mnttype, ":");
 139         cutstr = (char *) SMB_MALLOC(len+1);
 140         if (cutstr == NULL) {
 141                 errno = ENOMEM;
 142                 return -1;
 143         }
 144
 145         memset(cutstr, '\0', len+1);
 146         host = strncat(cutstr, mnttype, sizeof(char) * len);
 147         testpath = strchr_m(mnttype, ':');
 148         if (testpath == NULL) {
 149                 errno = EINVAL;
 150                 goto out;
 151         }
 152         testpath++;
 153         gq_args.gqa_pathp = testpath;
 154         gq_args.gqa_uid = id.uid;
 155
 156         DEBUG(10, ("sys_get_nfs_quotas: Asking for quota of path '%s' on "
 157                    "host '%s', rpcprog '%i', rpcvers '%i', network '%s'\n",
 158                     host, testpath+1, RQUOTAPROG, RQUOTAVERS, "udp"));
 159
 160         clnt = clnt_create(host, RQUOTAPROG, RQUOTAVERS, "udp");
 161         if (clnt == NULL) {
 162                 ret = -1;
 163                 goto out;
 164         }
 165
 166         clnt->cl_auth = authunix_create_default();
 167         if (clnt->cl_auth == NULL) {
 168                 DEBUG(3, ("sys_get_nfs_quotas: authunix_create_default "
 169                           "failed\n"));
 170                 ret = -1;
 171                 goto out;
 172         }
 173
 174         clnt_stat = clnt_call(clnt,
 175                               RQUOTAPROC_GETQUOTA,
 176                               (const xdrproc_t) my_xdr_getquota_args,
 177                               (caddr_t)&gq_args,
 178                               (const xdrproc_t) my_xdr_getquota_rslt,
 179                               (caddr_t)&gq_rslt,
 180                               timeout);
 181
 182         if (clnt_stat != RPC_SUCCESS) {
 183                 DEBUG(3, ("sys_get_nfs_quotas: clnt_call failed\n"));
 184                 ret = -1;
 185                 goto out;
 186         }
 187
 188         DEBUG(10, ("sys_get_nfs_quotas: getquota_rslt:\n"
 189                    "status       : '%i'\n"
 190                    "bsize        : '%i'\n"
 191                    "active       : '%s'\n"
 192                    "bhardlimit   : '%u'\n"
 193                    "bsoftlimit   : '%u'\n"
 194                    "curblocks    : '%u'\n"
 195                    "fhardlimit   : '%u'\n"
 196                    "fsoftlimit   : '%u'\n"
 197                    "curfiles     : '%u'\n"
 198                    "btimeleft    : '%u'\n"
 199                    "ftimeleft    : '%u'\n",
 200                    gq_rslt.GQR_STATUS,
 201                    gq_rslt.GQR_RQUOTA.rq_bsize,
 202                    gq_rslt.GQR_RQUOTA.rq_active?"yes":"no",
 203                    gq_rslt.GQR_RQUOTA.rq_bhardlimit,
 204                    gq_rslt.GQR_RQUOTA.rq_bsoftlimit,
 205                    gq_rslt.GQR_RQUOTA.rq_curblocks,
 206                    gq_rslt.GQR_RQUOTA.rq_fhardlimit,
 207                    gq_rslt.GQR_RQUOTA.rq_fsoftlimit,
 208                    gq_rslt.GQR_RQUOTA.rq_curfiles,
 209                    gq_rslt.GQR_RQUOTA.rq_btimeleft,
 210                    gq_rslt.GQR_RQUOTA.rq_ftimeleft));
 211
 212         /*
 213          * gqr.status returns
 214          *   0 if the rpc call fails,
 215          *   1 if quotas exist,
 216          *   2 if there is no quota set, and
 217          *   3 if no permission to get the quota.
 218          */
 219
 220         switch (gq_rslt.GQR_STATUS) {
 221         case 0:
 222                 DEBUG(3, ("sys_get_nfs_quotas: Remote Quotas Failed! "
 223                           "Error '%i'\n", gq_rslt.GQR_STATUS));
 224                 ret = -1;
 225                 goto out;
 226
 227         case 1:
 228                 DEBUG(10, ("sys_get_nfs_quotas: Good quota data\n"));
 229                 dp->bsize = (uint64_t)gq_rslt.GQR_RQUOTA.rq_bsize;
 230                 dp->softlimit = gq_rslt.GQR_RQUOTA.rq_bsoftlimit;
 231                 dp->hardlimit = gq_rslt.GQR_RQUOTA.rq_bhardlimit;
 232                 dp->curblocks = gq_rslt.GQR_RQUOTA.rq_curblocks;
 233                 break;
 234
 235         case 2:
 236                 DEBUG(5, ("sys_get_nfs_quotas: No quota set\n"));
 237                 SMB_QUOTAS_SET_NO_LIMIT(dp);
 238                 break;
 239
 240         case 3:
 241                 DEBUG(3, ("sys_get_nfs_quotas: no permission to get quota\n"));
 242                 errno = EPERM;
 243                 ret = -1;
 244                 goto out;
 245
 246         default:
 247                 DEBUG(5, ("sys_get_nfs_quotas: Unknown remote quota status "
 248                           "code '%i'\n", gq_rslt.GQR_STATUS));
 249                 ret = -1;
 250                 goto out;
 251                 break;
 252         }
 253
 254         dp->qflags = qflags;
 255
 256         ret = 0;
 257
 258 out:
 259         if (clnt) {
 260                 if (clnt->cl_auth) {
 261                         auth_destroy(clnt->cl_auth);
 262                 }
 263                 clnt_destroy(clnt);
 264         }
 265
 266         SAFE_FREE(cutstr);
 267
 268         DEBUG(10, ("sys_get_nfs_quotas: finished\n" ));
 269         return ret;
 270 }
 271
 272 int sys_set_nfs_quota(const char *path, const char *bdev,
 273                       enum SMB_QUOTA_TYPE qtype,
 274                       unid_t id, SMB_DISK_QUOTA *dp)
 275 {
 276         DEBUG(1, ("sys_set_nfs_quota : not supported\n"));
 277         errno = ENOSYS;
 278         return -1;
 279 }
 280
 281 #else /* HAVE_NFS_QUOTAS */
 282
 283 void dummy_sysquotas_nfs(void);
 284 void dummy_sysquotas_nfs(void) {}
 285
 286 #endif /* HAVE_NFS_QUOTAS */