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 #include "libcli/security/dom_sid.h"
  27
  28 #undef DBGC_CLASS
  29 #define DBGC_CLASS DBGC_QUOTA
  30
  31 static uint64_t limit_nt2unix(uint64_t in, uint64_t bsize)
  32 {
  33         uint64_t ret = (uint64_t)0;
  34
  35         ret =   (uint64_t)(in/bsize);
  36         if (in>0 && ret==0) {
  37                 /* we have to make sure that a overflow didn't set NO_LIMIT */
  38                 ret = (uint64_t)1;
  39         }
  40
  41         if (in == SMB_NTQUOTAS_NO_LIMIT)
  42                 ret = SMB_QUOTAS_NO_LIMIT;
  43         else if (in == SMB_NTQUOTAS_NO_SPACE)
  44                 ret = SMB_QUOTAS_NO_SPACE;
  45         else if (in == SMB_NTQUOTAS_NO_ENTRY)
  46                 ret = SMB_QUOTAS_NO_LIMIT;
  47
  48         return ret;
  49 }
  50
  51 static uint64_t limit_unix2nt(uint64_t in, uint64_t bsize)
  52 {
  53         uint64_t ret = (uint64_t)0;
  54
  55         ret = (uint64_t)(in*bsize);
  56
  57         return ret;
  58 }
  59
  60 NTSTATUS vfs_get_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype,
  61                          struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
  62 {
  63         int ret;
  64         SMB_DISK_QUOTA D;
  65         unid_t id;
  66         struct smb_filename *smb_fname_cwd = NULL;
  67         int saved_errno = 0;
  68
  69         ZERO_STRUCT(D);
  70
  71         if (!fsp || !fsp->conn || !qt) {
  72                 return NT_STATUS_INTERNAL_ERROR;
  73         }
  74
  75         ZERO_STRUCT(*qt);
  76
  77         id.uid = -1;
  78
  79         if (psid && !sid_to_uid(psid, &id.uid)) {
  80                 struct dom_sid_buf buf;
  81                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
  82                          dom_sid_str_buf(psid, &buf)));
  83                 return NT_STATUS_NO_SUCH_USER;
  84         }
  85
  86         smb_fname_cwd = synthetic_smb_fname(talloc_tos(),
  87                                 ".",
  88                                 NULL,
  89                                 NULL,
  90                                 0);
  91         if (smb_fname_cwd == NULL) {
  92                 return NT_STATUS_NO_MEMORY;
  93         }
  94
  95         ret = SMB_VFS_GET_QUOTA(fsp->conn, smb_fname_cwd, qtype, id, &D);
  96         if (ret == -1) {
  97                 saved_errno = errno;
  98         }
  99         TALLOC_FREE(smb_fname_cwd);
 100         if (saved_errno != 0) {
 101                 errno = saved_errno;
 102         }
 103
 104         if (psid)
 105                 qt->sid    = *psid;
 106
 107         if (ret!=0) {
 108                 return map_nt_error_from_unix(errno);
 109         }
 110
 111         qt->usedspace = (uint64_t)D.curblocks*D.bsize;
 112         qt->softlim = limit_unix2nt(D.softlimit, D.bsize);
 113         qt->hardlim = limit_unix2nt(D.hardlimit, D.bsize);
 114         qt->qflags = D.qflags;
 115
 116         return NT_STATUS_OK;
 117 }
 118
 119 int vfs_set_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
 120 {
 121         int ret;
 122         SMB_DISK_QUOTA D;
 123         unid_t id;
 124         ZERO_STRUCT(D);
 125
 126         if (!fsp||!fsp->conn||!qt)
 127                 return (-1);
 128
 129         id.uid = -1;
 130
 131         D.bsize     = (uint64_t)QUOTABLOCK_SIZE;
 132
 133         D.softlimit = limit_nt2unix(qt->softlim,D.bsize);
 134         D.hardlimit = limit_nt2unix(qt->hardlim,D.bsize);
 135         D.qflags     = qt->qflags;
 136
 137         if (psid && !sid_to_uid(psid, &id.uid)) {
 138                 struct dom_sid_buf buf;
 139                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
 140                          dom_sid_str_buf(psid, &buf)));
 141         }
 142
 143         ret = SMB_VFS_SET_QUOTA(fsp->conn, qtype, id, &D);
 144
 145         return ret;
 146 }
 147
 148 static bool already_in_quota_list(SMB_NTQUOTA_LIST *qt_list, uid_t uid)
 149 {
 150         SMB_NTQUOTA_LIST *tmp_list = NULL;
 151
 152         if (!qt_list)
 153                 return False;
 154
 155         for (tmp_list=qt_list;tmp_list!=NULL;tmp_list=tmp_list->next) {
 156                 if (tmp_list->uid == uid) {
 157                         return True;
 158                 }
 159         }
 160
 161         return False;
 162 }
 163
 164 int vfs_get_user_ntquota_list(files_struct *fsp, SMB_NTQUOTA_LIST **qt_list)
 165 {
 166         struct passwd *usr;
 167         TALLOC_CTX *mem_ctx = NULL;
 168
 169         if (!fsp||!fsp->conn||!qt_list)
 170                 return (-1);
 171
 172         *qt_list = NULL;
 173
 174         if ((mem_ctx=talloc_init("SMB_USER_QUOTA_LIST"))==NULL) {
 175                 DEBUG(0,("talloc_init() failed\n"));
 176                 return (-1);
 177         }
 178
 179         setpwent();
 180         while ((usr = getpwent()) != NULL) {
 181                 SMB_NTQUOTA_STRUCT tmp_qt;
 182                 SMB_NTQUOTA_LIST *tmp_list_ent;
 183                 struct dom_sid  sid;
 184                 struct dom_sid_buf buf;
 185                 NTSTATUS status;
 186
 187                 ZERO_STRUCT(tmp_qt);
 188
 189                 if (already_in_quota_list((*qt_list),usr->pw_uid)) {
 190                         DEBUG(5,("record for uid[%ld] already in the list\n",(long)usr->pw_uid));
 191                         continue;
 192                 }
 193
 194                 uid_to_sid(&sid, usr->pw_uid);
 195
 196                 status =
 197                     vfs_get_ntquota(fsp, SMB_USER_QUOTA_TYPE, &sid, &tmp_qt);
 198                 if (!NT_STATUS_IS_OK(status)) {
 199                         DEBUG(5, ("failed getting quota for uid[%ld] - %s\n",
 200                                   (long)usr->pw_uid, nt_errstr(status)));
 201                         continue;
 202                 }
 203                 if (tmp_qt.softlim == 0 && tmp_qt.hardlim == 0) {
 204                         DEBUG(5,("no quota entry for sid[%s] path[%s]\n",
 205                                  dom_sid_str_buf(&sid, &buf),
 206                                  fsp->conn->connectpath));
 207                         continue;
 208                 }
 209
 210                 DEBUG(15,("quota entry for id[%s] path[%s]\n",
 211                           dom_sid_str_buf(&sid, &buf),
 212                           fsp->conn->connectpath));
 213
 214                 if ((tmp_list_ent=talloc_zero(mem_ctx,SMB_NTQUOTA_LIST))==NULL) {
 215                         DEBUG(0,("TALLOC_ZERO() failed\n"));
 216                         *qt_list = NULL;
 217                         talloc_destroy(mem_ctx);
 218                         return (-1);
 219                 }
 220
 221                 if ((tmp_list_ent->quotas=talloc_zero(mem_ctx,SMB_NTQUOTA_STRUCT))==NULL) {
 222                         DEBUG(0,("TALLOC_ZERO() failed\n"));
 223                         *qt_list = NULL;
 224                         talloc_destroy(mem_ctx);
 225                         return (-1);
 226                 }
 227
 228                 tmp_list_ent->uid = usr->pw_uid;
 229                 memcpy(tmp_list_ent->quotas,&tmp_qt,sizeof(tmp_qt));
 230                 tmp_list_ent->mem_ctx = mem_ctx;
 231
 232                 DLIST_ADD((*qt_list),tmp_list_ent);
 233
 234         }
 235         endpwent();
 236
 237         if (*qt_list == NULL) {
 238                 TALLOC_FREE(mem_ctx);
 239         }
 240         return 0;
 241 }
 242
 243 static int quota_handle_destructor(SMB_NTQUOTA_HANDLE *handle)
 244 {
 245         free_ntquota_list(&handle->quota_list);
 246         return 0;
 247 }
 248
 249 void *init_quota_handle(TALLOC_CTX *mem_ctx)
 250 {
 251         SMB_NTQUOTA_HANDLE *qt_handle;
 252
 253         if (!mem_ctx)
 254                 return NULL;
 255
 256         qt_handle = talloc_zero(mem_ctx,SMB_NTQUOTA_HANDLE);
 257         if (qt_handle==NULL) {
 258                 DEBUG(0,("TALLOC_ZERO() failed\n"));
 259                 return NULL;
 260         }
 261
 262         talloc_set_destructor(qt_handle, quota_handle_destructor);
 263         return (void *)qt_handle;
 264 }