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         struct smb_filename *smb_fname_cwd = NULL;
  78         int saved_errno = 0;
  79
  80         ZERO_STRUCT(D);
  81
  82         if (!fsp || !fsp->conn || !qt) {
  83                 return NT_STATUS_INTERNAL_ERROR;
  84         }
  85
  86         ZERO_STRUCT(*qt);
  87
  88         id.uid = -1;
  89
  90         if (psid && !sid_to_uid(psid, &id.uid)) {
  91                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
  92                          sid_string_dbg(psid)));
  93                 return NT_STATUS_NO_SUCH_USER;
  94         }
  95
  96         smb_fname_cwd = synthetic_smb_fname(talloc_tos(),
  97                                 ".",
  98                                 NULL,
  99                                 NULL,
 100                                 0);
 101         if (smb_fname_cwd == NULL) {
 102                 return NT_STATUS_NO_MEMORY;
 103         }
 104
 105         ret = SMB_VFS_GET_QUOTA(fsp->conn, smb_fname_cwd, qtype, id, &D);
 106         if (ret == -1) {
 107                 saved_errno = errno;
 108         }
 109         TALLOC_FREE(smb_fname_cwd);
 110         if (saved_errno != 0) {
 111                 errno = saved_errno;
 112         }
 113
 114         if (psid)
 115                 qt->sid    = *psid;
 116
 117         if (ret!=0) {
 118                 return map_nt_error_from_unix(errno);
 119         }
 120
 121         qt->usedspace = (uint64_t)D.curblocks*D.bsize;
 122         qt->softlim = limit_unix2nt(D.softlimit, D.bsize);
 123         qt->hardlim = limit_unix2nt(D.hardlimit, D.bsize);
 124         qt->qflags = D.qflags;
 125
 126         return NT_STATUS_OK;
 127 }
 128
 129 int vfs_set_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
 130 {
 131         int ret;
 132         SMB_DISK_QUOTA D;
 133         unid_t id;
 134         ZERO_STRUCT(D);
 135
 136         if (!fsp||!fsp->conn||!qt)
 137                 return (-1);
 138
 139         id.uid = -1;
 140
 141         D.bsize     = (uint64_t)QUOTABLOCK_SIZE;
 142
 143         D.softlimit = limit_nt2unix(qt->softlim,D.bsize);
 144         D.hardlimit = limit_nt2unix(qt->hardlim,D.bsize);
 145         D.qflags     = qt->qflags;
 146
 147         D.isoftlimit = limit_blk2inodes(D.softlimit);
 148         D.ihardlimit = limit_blk2inodes(D.hardlimit);
 149
 150         if (psid && !sid_to_uid(psid, &id.uid)) {
 151                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
 152                          sid_string_dbg(psid)));
 153         }
 154
 155         ret = SMB_VFS_SET_QUOTA(fsp->conn, qtype, id, &D);
 156
 157         return ret;
 158 }
 159
 160 static bool already_in_quota_list(SMB_NTQUOTA_LIST *qt_list, uid_t uid)
 161 {
 162         SMB_NTQUOTA_LIST *tmp_list = NULL;
 163
 164         if (!qt_list)
 165                 return False;
 166
 167         for (tmp_list=qt_list;tmp_list!=NULL;tmp_list=tmp_list->next) {
 168                 if (tmp_list->uid == uid) {
 169                         return True;
 170                 }
 171         }
 172
 173         return False;
 174 }
 175
 176 int vfs_get_user_ntquota_list(files_struct *fsp, SMB_NTQUOTA_LIST **qt_list)
 177 {
 178         struct passwd *usr;
 179         TALLOC_CTX *mem_ctx = NULL;
 180
 181         if (!fsp||!fsp->conn||!qt_list)
 182                 return (-1);
 183
 184         *qt_list = NULL;
 185
 186         if ((mem_ctx=talloc_init("SMB_USER_QUOTA_LIST"))==NULL) {
 187                 DEBUG(0,("talloc_init() failed\n"));
 188                 return (-1);
 189         }
 190
 191         setpwent();
 192         while ((usr = getpwent()) != NULL) {
 193                 SMB_NTQUOTA_STRUCT tmp_qt;
 194                 SMB_NTQUOTA_LIST *tmp_list_ent;
 195                 struct dom_sid  sid;
 196                 NTSTATUS status;
 197
 198                 ZERO_STRUCT(tmp_qt);
 199
 200                 if (already_in_quota_list((*qt_list),usr->pw_uid)) {
 201                         DEBUG(5,("record for uid[%ld] already in the list\n",(long)usr->pw_uid));
 202                         continue;
 203                 }
 204
 205                 uid_to_sid(&sid, usr->pw_uid);
 206
 207                 status =
 208                     vfs_get_ntquota(fsp, SMB_USER_QUOTA_TYPE, &sid, &tmp_qt);
 209                 if (!NT_STATUS_IS_OK(status)) {
 210                         DEBUG(5, ("failed getting quota for uid[%ld] - %s\n",
 211                                   (long)usr->pw_uid, nt_errstr(status)));
 212                         continue;
 213                 }
 214                 if (tmp_qt.softlim == 0 && tmp_qt.hardlim == 0) {
 215                         DEBUG(5,("no quota entry for sid[%s] path[%s]\n",
 216                                  sid_string_dbg(&sid),
 217                                  fsp->conn->connectpath));
 218                         continue;
 219                 }
 220
 221                 DEBUG(15,("quota entry for id[%s] path[%s]\n",
 222                           sid_string_dbg(&sid), fsp->conn->connectpath));
 223
 224                 if ((tmp_list_ent=talloc_zero(mem_ctx,SMB_NTQUOTA_LIST))==NULL) {
 225                         DEBUG(0,("TALLOC_ZERO() failed\n"));
 226                         *qt_list = NULL;
 227                         talloc_destroy(mem_ctx);
 228                         return (-1);
 229                 }
 230
 231                 if ((tmp_list_ent->quotas=talloc_zero(mem_ctx,SMB_NTQUOTA_STRUCT))==NULL) {
 232                         DEBUG(0,("TALLOC_ZERO() failed\n"));
 233                         *qt_list = NULL;
 234                         talloc_destroy(mem_ctx);
 235                         return (-1);
 236                 }
 237
 238                 tmp_list_ent->uid = usr->pw_uid;
 239                 memcpy(tmp_list_ent->quotas,&tmp_qt,sizeof(tmp_qt));
 240                 tmp_list_ent->mem_ctx = mem_ctx;
 241
 242                 DLIST_ADD((*qt_list),tmp_list_ent);
 243
 244         }
 245         endpwent();
 246
 247         if (*qt_list == NULL) {
 248                 TALLOC_FREE(mem_ctx);
 249         }
 250         return 0;
 251 }
 252
 253 static int quota_handle_destructor(SMB_NTQUOTA_HANDLE *handle)
 254 {
 255         free_ntquota_list(&handle->quota_list);
 256         return 0;
 257 }
 258
 259 void *init_quota_handle(TALLOC_CTX *mem_ctx)
 260 {
 261         SMB_NTQUOTA_HANDLE *qt_handle;
 262
 263         if (!mem_ctx)
 264                 return NULL;
 265
 266         qt_handle = talloc_zero(mem_ctx,SMB_NTQUOTA_HANDLE);
 267         if (qt_handle==NULL) {
 268                 DEBUG(0,("TALLOC_ZERO() failed\n"));
 269                 return NULL;
 270         }
 271
 272         talloc_set_destructor(qt_handle, quota_handle_destructor);
 273         return (void *)qt_handle;
 274 }