smbd/ntquotas.c

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/* 
   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_QUOTA

static SMB_BIG_UINT limit_nt2unix(SMB_BIG_UINT in, SMB_BIG_UINT bsize)
{
        SMB_BIG_UINT ret = (SMB_BIG_UINT)0;

        ret =   (SMB_BIG_UINT)(in/bsize);
        if (in>0 && ret==0) {
                /* we have to make sure that a overflow didn't set NO_LIMIT */
                ret = (SMB_BIG_UINT)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 SMB_BIG_UINT limit_unix2nt(SMB_BIG_UINT in, SMB_BIG_UINT bsize)
{
        SMB_BIG_UINT ret = (SMB_BIG_UINT)0;

        ret = (SMB_BIG_UINT)(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 SMB_BIG_UINT limit_blk2inodes(SMB_BIG_UINT in)
{
        SMB_BIG_UINT ret = (SMB_BIG_UINT)0;
        
        ret = (SMB_BIG_UINT)(in/2);
        
        if (ret == 0 && in != 0)
                ret = (SMB_BIG_UINT)1;

        return ret;     
}

int vfs_get_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, 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_static(psid)));      
        }

        ret = SMB_VFS_GET_QUOTA(fsp->conn, qtype, id, &D);

        if (psid)
                qt->sid    = *psid;

        if (ret!=0) {
                return ret;
        }
                
        qt->usedspace = (SMB_BIG_UINT)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, 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     = (SMB_BIG_UINT)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_static(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;
                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_static(&sid),fsp->conn->connectpath));
                        continue;
                }

                DEBUG(15,("quota entry for id[%s] path[%s]\n",
                        sid_string_static(&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;
}

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;
        }

        return (void *)qt_handle;       
}

void destroy_quota_handle(void **pqt_handle)
{
        SMB_NTQUOTA_HANDLE *qt_handle = NULL;
        if (!pqt_handle||!(*pqt_handle))
                return;
        
        qt_handle = (SMB_NTQUOTA_HANDLE *)(*pqt_handle);
        
        
        if (qt_handle->quota_list)
                free_ntquota_list(&qt_handle->quota_list);

        qt_handle->quota_list = NULL;
        qt_handle->tmp_list = NULL;
        qt_handle = NULL;

        return;
}

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