source3/smbd/ntquotas.c

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