source3/smbd/ntquotas.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NT QUOTA suppport
   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 #include "includes.h"
  21 #include "smbd/smbd.h"
  22 #include "../lib/util/util_pw.h"
  23 #include "system/passwd.h"
  24 #include "passdb/lookup_sid.h"
  25 #include "libsmb/libsmb.h"
  26
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_QUOTA
  29
  30 static uint64_t limit_nt2unix(uint64_t in, uint64_t bsize)
  31 {
  32         uint64_t ret = (uint64_t)0;
  33
  34         ret =   (uint64_t)(in/bsize);
  35         if (in>0 && ret==0) {
  36                 /* we have to make sure that a overflow didn't set NO_LIMIT */
  37                 ret = (uint64_t)1;
  38         }
  39
  40         if (in == SMB_NTQUOTAS_NO_LIMIT)
  41                 ret = SMB_QUOTAS_NO_LIMIT;
  42         else if (in == SMB_NTQUOTAS_NO_SPACE)
  43                 ret = SMB_QUOTAS_NO_SPACE;
  44         else if (in == SMB_NTQUOTAS_NO_ENTRY)
  45                 ret = SMB_QUOTAS_NO_LIMIT;
  46
  47         return ret;
  48 }
  49
  50 static uint64_t limit_unix2nt(uint64_t in, uint64_t bsize)
  51 {
  52         uint64_t ret = (uint64_t)0;
  53
  54         ret = (uint64_t)(in*bsize);
  55
  56         return ret;
  57 }
  58
  59 static uint64_t limit_blk2inodes(uint64_t in)
  60 {
  61         uint64_t ret = (uint64_t)0;
  62
  63         ret = (uint64_t)(in/2);
  64
  65         if (ret == 0 && in != 0)
  66                 ret = (uint64_t)1;
  67
  68         return ret;
  69 }
  70
  71 NTSTATUS vfs_get_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype,
  72                          struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
  73 {
  74         int ret;
  75         SMB_DISK_QUOTA D;
  76         unid_t id;
  77
  78         ZERO_STRUCT(D);
  79
  80         if (!fsp || !fsp->conn || !qt) {
  81                 return NT_STATUS_INTERNAL_ERROR;
  82         }
  83
  84         ZERO_STRUCT(*qt);
  85
  86         id.uid = -1;
  87
  88         if (psid && !sid_to_uid(psid, &id.uid)) {
  89                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
  90                          sid_string_dbg(psid)));
  91                 return NT_STATUS_NO_SUCH_USER;
  92         }
  93
  94         ret = SMB_VFS_GET_QUOTA(fsp->conn, ".", qtype, id, &D);
  95
  96         if (psid)
  97                 qt->sid    = *psid;
  98
  99         if (ret!=0) {
 100                 return map_nt_error_from_unix(errno);
 101         }
 102
 103         qt->usedspace = (uint64_t)D.curblocks*D.bsize;
 104         qt->softlim = limit_unix2nt(D.softlimit, D.bsize);
 105         qt->hardlim = limit_unix2nt(D.hardlimit, D.bsize);
 106         qt->qflags = D.qflags;
 107
 108         return NT_STATUS_OK;
 109 }
 110
 111 int vfs_set_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
 112 {
 113         int ret;
 114         SMB_DISK_QUOTA D;
 115         unid_t id;
 116         ZERO_STRUCT(D);
 117
 118         if (!fsp||!fsp->conn||!qt)
 119                 return (-1);
 120
 121         id.uid = -1;
 122
 123         D.bsize     = (uint64_t)QUOTABLOCK_SIZE;
 124
 125         D.softlimit = limit_nt2unix(qt->softlim,D.bsize);
 126         D.hardlimit = limit_nt2unix(qt->hardlim,D.bsize);
 127         D.qflags     = qt->qflags;
 128
 129         D.isoftlimit = limit_blk2inodes(D.softlimit);
 130         D.ihardlimit = limit_blk2inodes(D.hardlimit);
 131
 132         if (psid && !sid_to_uid(psid, &id.uid)) {
 133                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
 134                          sid_string_dbg(psid)));
 135         }
 136
 137         ret = SMB_VFS_SET_QUOTA(fsp->conn, qtype, id, &D);
 138
 139         return ret;
 140 }
 141
 142 static bool already_in_quota_list(SMB_NTQUOTA_LIST *qt_list, uid_t uid)
 143 {
 144         SMB_NTQUOTA_LIST *tmp_list = NULL;
 145
 146         if (!qt_list)
 147                 return False;
 148
 149         for (tmp_list=qt_list;tmp_list!=NULL;tmp_list=tmp_list->next) {
 150                 if (tmp_list->uid == uid) {
 151                         return True;
 152                 }
 153         }
 154
 155         return False;
 156 }
 157
 158 int vfs_get_user_ntquota_list(files_struct *fsp, SMB_NTQUOTA_LIST **qt_list)
 159 {
 160         struct passwd *usr;
 161         TALLOC_CTX *mem_ctx = NULL;
 162
 163         if (!fsp||!fsp->conn||!qt_list)
 164                 return (-1);
 165
 166         *qt_list = NULL;
 167
 168         if ((mem_ctx=talloc_init("SMB_USER_QUOTA_LIST"))==NULL) {
 169                 DEBUG(0,("talloc_init() failed\n"));
 170                 return (-1);
 171         }
 172
 173         setpwent();
 174         while ((usr = getpwent()) != NULL) {
 175                 SMB_NTQUOTA_STRUCT tmp_qt;
 176                 SMB_NTQUOTA_LIST *tmp_list_ent;
 177                 struct dom_sid  sid;
 178                 NTSTATUS status;
 179
 180                 ZERO_STRUCT(tmp_qt);
 181
 182                 if (already_in_quota_list((*qt_list),usr->pw_uid)) {
 183                         DEBUG(5,("record for uid[%ld] already in the list\n",(long)usr->pw_uid));
 184                         continue;
 185                 }
 186
 187                 uid_to_sid(&sid, usr->pw_uid);
 188
 189                 status =
 190                     vfs_get_ntquota(fsp, SMB_USER_QUOTA_TYPE, &sid, &tmp_qt);
 191                 if (!NT_STATUS_IS_OK(status)) {
 192                         DEBUG(5, ("failed getting quota for uid[%ld] - %s\n",
 193                                   (long)usr->pw_uid, nt_errstr(status)));
 194                         continue;
 195                 }
 196                 if (tmp_qt.softlim == 0 && tmp_qt.hardlim == 0) {
 197                         DEBUG(5,("no quota entry for sid[%s] path[%s]\n",
 198                                  sid_string_dbg(&sid),
 199                                  fsp->conn->connectpath));
 200                         continue;
 201                 }
 202
 203                 DEBUG(15,("quota entry for id[%s] path[%s]\n",
 204                           sid_string_dbg(&sid), fsp->conn->connectpath));
 205
 206                 if ((tmp_list_ent=talloc_zero(mem_ctx,SMB_NTQUOTA_LIST))==NULL) {
 207                         DEBUG(0,("TALLOC_ZERO() failed\n"));
 208                         *qt_list = NULL;
 209                         talloc_destroy(mem_ctx);
 210                         return (-1);
 211                 }
 212
 213                 if ((tmp_list_ent->quotas=talloc_zero(mem_ctx,SMB_NTQUOTA_STRUCT))==NULL) {
 214                         DEBUG(0,("TALLOC_ZERO() failed\n"));
 215                         *qt_list = NULL;
 216                         talloc_destroy(mem_ctx);
 217                         return (-1);
 218                 }
 219
 220                 tmp_list_ent->uid = usr->pw_uid;
 221                 memcpy(tmp_list_ent->quotas,&tmp_qt,sizeof(tmp_qt));
 222                 tmp_list_ent->mem_ctx = mem_ctx;
 223
 224                 DLIST_ADD((*qt_list),tmp_list_ent);
 225
 226         }
 227         endpwent();
 228
 229         if (*qt_list == NULL) {
 230                 TALLOC_FREE(mem_ctx);
 231         }
 232         return 0;
 233 }
 234
 235 static int quota_handle_destructor(SMB_NTQUOTA_HANDLE *handle)
 236 {
 237         free_ntquota_list(&handle->quota_list);
 238         return 0;
 239 }
 240
 241 void *init_quota_handle(TALLOC_CTX *mem_ctx)
 242 {
 243         SMB_NTQUOTA_HANDLE *qt_handle;
 244
 245         if (!mem_ctx)
 246                 return NULL;
 247
 248         qt_handle = talloc_zero(mem_ctx,SMB_NTQUOTA_HANDLE);
 249         if (qt_handle==NULL) {
 250                 DEBUG(0,("TALLOC_ZERO() failed\n"));
 251                 return NULL;
 252         }
 253
 254         talloc_set_destructor(qt_handle, quota_handle_destructor);
 255         return (void *)qt_handle;
 256 }