text: /* 
     Unix SMB/CIFS implementation.
     NT QUOTA suppport
     Copyright (C) Stefan (metze) Metzmacher	2003
     
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
     
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
     
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  #include "includes.h"
  #include "smbd/smbd.h"
  #include "../lib/util/util_pw.h"
  #include "system/passwd.h"
  #include "passdb/lookup_sid.h"
  #include "libsmb/libsmb.h"
  
  #undef DBGC_CLASS
  #define DBGC_CLASS DBGC_QUOTA
  
  static uint64_t limit_nt2unix(uint64_t in, uint64_t bsize)
  {
  	uint64_t ret = (uint64_t)0;
  
  	ret = 	(uint64_t)(in/bsize);
  	if (in>0 && ret==0) {
  		/* we have to make sure that a overflow didn't set NO_LIMIT */
  		ret = (uint64_t)1;
  	}
  
  	if (in == SMB_NTQUOTAS_NO_LIMIT)
  		ret = SMB_QUOTAS_NO_LIMIT;
  	else if (in == SMB_NTQUOTAS_NO_SPACE)
  		ret = SMB_QUOTAS_NO_SPACE;
  	else if (in == SMB_NTQUOTAS_NO_ENTRY)
  		ret = SMB_QUOTAS_NO_LIMIT;
  
  	return ret;
  }
  
  static uint64_t limit_unix2nt(uint64_t in, uint64_t bsize)
  {
  	uint64_t ret = (uint64_t)0;
  
  	ret = (uint64_t)(in*bsize);
  	
  	if (ret < in) {
  		/* we overflow */
  		ret = SMB_NTQUOTAS_NO_LIMIT;
  	}
  
  	if (in == SMB_QUOTAS_NO_LIMIT)
  		ret = SMB_NTQUOTAS_NO_LIMIT;
  
  	return ret;
  }
  
  static uint64_t limit_blk2inodes(uint64_t in)
  {
  	uint64_t ret = (uint64_t)0;
  	
  	ret = (uint64_t)(in/2);
  	
  	if (ret == 0 && in != 0)
  		ret = (uint64_t)1;
  
  	return ret;	
  }
  
  int vfs_get_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
  {
  	int ret;
  	SMB_DISK_QUOTA D;
  	unid_t id;
  
  	ZERO_STRUCT(D);
  
  	if (!fsp||!fsp->conn||!qt)
  		return (-1);
  
  	ZERO_STRUCT(*qt);
  
  	id.uid = -1;
  
  	if (psid && !sid_to_uid(psid, &id.uid)) {
  		DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
  			 sid_string_dbg(psid)));
  	}
  
  	ret = SMB_VFS_GET_QUOTA(fsp->conn, qtype, id, &D);
  
  	if (psid)
  		qt->sid    = *psid;
  
  	if (ret!=0) {
  		return ret;
  	}
  		
  	qt->usedspace = (uint64_t)D.curblocks*D.bsize;
  	qt->softlim = limit_unix2nt(D.softlimit, D.bsize);
  	qt->hardlim = limit_unix2nt(D.hardlimit, D.bsize);
  	qt->qflags = D.qflags;
  
  	
  	return 0;
  }
  
  int vfs_set_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
  {
  	int ret;
  	SMB_DISK_QUOTA D;
  	unid_t id;
  	ZERO_STRUCT(D);
  
  	if (!fsp||!fsp->conn||!qt)
  		return (-1);
  
  	id.uid = -1;
  
  	D.bsize     = (uint64_t)QUOTABLOCK_SIZE;
  
  	D.softlimit = limit_nt2unix(qt->softlim,D.bsize);
  	D.hardlimit = limit_nt2unix(qt->hardlim,D.bsize);
  	D.qflags     = qt->qflags;
  
  	D.isoftlimit = limit_blk2inodes(D.softlimit);
  	D.ihardlimit = limit_blk2inodes(D.hardlimit);
  
  	if (psid && !sid_to_uid(psid, &id.uid)) {
  		DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
  			 sid_string_dbg(psid)));
  	}
  
  	ret = SMB_VFS_SET_QUOTA(fsp->conn, qtype, id, &D);
  	
  	return ret;
  }
  
  static bool allready_in_quota_list(SMB_NTQUOTA_LIST *qt_list, uid_t uid)
  {
  	SMB_NTQUOTA_LIST *tmp_list = NULL;
  	
  	if (!qt_list)
  		return False;
  
  	for (tmp_list=qt_list;tmp_list!=NULL;tmp_list=tmp_list->next) {
  		if (tmp_list->uid == uid) {
  			return True;	
  		}
  	}
  
  	return False;
  }
  
  int vfs_get_user_ntquota_list(files_struct *fsp, SMB_NTQUOTA_LIST **qt_list)
  {
  	struct passwd *usr;
  	TALLOC_CTX *mem_ctx = NULL;
  
  	if (!fsp||!fsp->conn||!qt_list)
  		return (-1);
  
  	*qt_list = NULL;
  
  	if ((mem_ctx=talloc_init("SMB_USER_QUOTA_LIST"))==NULL) {
  		DEBUG(0,("talloc_init() failed\n"));
  		return (-1);
  	}
  
  	sys_setpwent();
  	while ((usr = sys_getpwent()) != NULL) {
  		SMB_NTQUOTA_STRUCT tmp_qt;
  		SMB_NTQUOTA_LIST *tmp_list_ent;
  		struct dom_sid	sid;
  
  		ZERO_STRUCT(tmp_qt);
  
  		if (allready_in_quota_list((*qt_list),usr->pw_uid)) {
  			DEBUG(5,("record for uid[%ld] allready in the list\n",(long)usr->pw_uid));
  			continue;
  		}
  
  		uid_to_sid(&sid, usr->pw_uid);
  
  		if (vfs_get_ntquota(fsp, SMB_USER_QUOTA_TYPE, &sid, &tmp_qt)!=0) {
  			DEBUG(5,("no quota entry for sid[%s] path[%s]\n",
  				 sid_string_dbg(&sid),
  				 fsp->conn->connectpath));
  			continue;
  		}
  
  		DEBUG(15,("quota entry for id[%s] path[%s]\n",
  			  sid_string_dbg(&sid), fsp->conn->connectpath));
  
  		if ((tmp_list_ent=TALLOC_ZERO_P(mem_ctx,SMB_NTQUOTA_LIST))==NULL) {
  			DEBUG(0,("TALLOC_ZERO() failed\n"));
  			*qt_list = NULL;
  			talloc_destroy(mem_ctx);
  			return (-1);
  		}
  
  		if ((tmp_list_ent->quotas=TALLOC_ZERO_P(mem_ctx,SMB_NTQUOTA_STRUCT))==NULL) {
  			DEBUG(0,("TALLOC_ZERO() failed\n"));
  			*qt_list = NULL;
  			talloc_destroy(mem_ctx);
  			return (-1);
  		}
  
  		tmp_list_ent->uid = usr->pw_uid;
  		memcpy(tmp_list_ent->quotas,&tmp_qt,sizeof(tmp_qt));
  		tmp_list_ent->mem_ctx = mem_ctx;
  
  		DLIST_ADD((*qt_list),tmp_list_ent);
  		
  	}
  	sys_endpwent();
  
  	return 0;
  }
  
  static int quota_handle_destructor(SMB_NTQUOTA_HANDLE *handle)
  {
  	if (handle->quota_list)
  		free_ntquota_list(&handle->quota_list);
  	return 0;
  }
  
  void *init_quota_handle(TALLOC_CTX *mem_ctx)
  {
  	SMB_NTQUOTA_HANDLE *qt_handle;
  
  	if (!mem_ctx)
  		return False;
  
  	qt_handle = TALLOC_ZERO_P(mem_ctx,SMB_NTQUOTA_HANDLE);
  	if (qt_handle==NULL) {
  		DEBUG(0,("TALLOC_ZERO() failed\n"));
  		return NULL;
  	}
  
  	talloc_set_destructor(qt_handle, quota_handle_destructor);
  	return (void *)qt_handle;
  }
  