#!/bin/bash
# ----------------------------------------------------------------------
# File: mount.eos
# Author: Andreas-Joachim Peters - CERN
# ----------------------------------------------------------------------

# ************************************************************************
# * EOS - the CERN Disk Storage System                                   *
# * Copyright (C) 2016 CERN/Switzerland                                  *
# *                                                                      *
# * 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/>.*
# ************************************************************************

case $(basename $1) in
  -h|--help|-?)
      echo "mount.eos is a private mount(8) wrapper for EOS."
      echo "Don't use it directly!"
      exit 1
      ;;
esac

restricted=1

if [ $UID -eq 0 ] && [ $UID -eq $EUID ]; then
  restricted=0
fi

# mount(8) in restricted mode (for non-root users) does not allow to use any
# mount options,
# we fail for users

if [ $restricted -eq 1 ]; then
  echo "error: non-root mount attempted !"
  exit -1;
fi

if [ -z "$(basename $1)" ]; then
    echo "error: please provide the name of your FUSE mount !"
    exit -1;
fi

[ -f /etc/sysconfig/eos ] && . /etc/sysconfig/eos

[ -f /etc/sysconfig/eos.$(basename $1) ] && . /etc/sysconfig/eos.$(basename $1)

if [ -n "$2" ]; then
    export EOS_FUSE_MOUNTDIR=$2
fi

export EOSD=${EOSD-eosd}
export EOS_ROOT=${EOS_ROOT-/usr/}
export EOS_FUSE_PING_TIMEOUT=${EOS_FUSE_PING_TIMEOUT-15}
export EOS_FUSE_DEBUG=${EOS_FUSE_DEBUG-0}
export EOS_FUSE_LOWLEVEL_DEBUG=${EOS_FUSE_LOWLEVEL_DEBUG-0}
export EOS_FUSE_NOACCESS=${EOS_FUSE_NOACCESS-1}
export EOS_FUSE_SYNC=${EOS_FUSE_SYNC-0}
export EOS_FUSE_KERNELCACHE=${EOS_FUSE_KERNELCACHE-1}
export EOS_FUSE_DIRECTIO=${EOS_FUSE_DIRECTIO-0}
export EOS_FUSE_CACHE=${EOS_FUSE_CACHE-1}
export EOS_FUSE_CACHE_SIZE=${EOS_FUSE_CACHE_SIZE-67108864}
export EOS_FUSE_CACHE_PAGE_SIZE=${EOS_FUSE_CACHE_PAGE_SIZE-262144}
export EOS_FUSE_BIGWRITES=${EOS_FUSE_BIGWRITES-1}    
export EOS_FUSE_EXEC=${EOS_FUSE_EXEC-0}
export EOS_FUSE_NO_MT=${EOS_FUSE_NO_MT-0}
export EOS_FUSE_SSS_KEYTAB=${EOS_FUSE_SSS_KEYTAB-""}
export EOS_FUSE_USER_KRB5CC=${EOS_FUSE_USER_KRB5CC-0}
export EOS_FUSE_USER_UNSAFEKRB5=${EOS_FUSE_USER_UNSAFEKRB5-0}
export EOS_FUSE_USER_GSIPROXY=${EOS_FUSE_USER_GSIPROXY-0}
export EOS_FUSE_USER_KRB5FIRST=${EOS_FUSE_USER_KRB5FIRST-0}
export EOS_FUSE_FALLBACKTONOBODY=${EOS_FUSE_FALLBACKTONOBODY-0}
export EOS_FUSE_PIDMAP=${EOS_FUSE_PIDMAP-0}
export EOS_FUSE_RMLVL_PROTECT=${EOS_FUSE_RMLVL_PROTECT-1}
export EOS_FUSE_RDAHEAD=${EOS_FUSE_RDAHEAD-0}
export EOS_FUSE_RDAHEAD_WINDOW=${EOS_FUSE_RDAHEAD_WINDOW-131072}
export EOS_FUSE_LAZYOPENRO=${EOS_FUSE_LAZYOPENRO-0}
export EOS_FUSE_LAZYOPENRW=${EOS_FUSE_LAZYOPENRW-1}
export EOS_FUSE_ASYNC_OPEN=${EOS_FUSE_ASYNC_OPEN-0}
export EOS_FUSE_SHOW_SPECIAL_FILES=${EOS_FUSE_SHOW_SPECIAL_FILES-0}
export EOS_FUSE_SHOW_EOS_ATTRIBUTES=${EOS_FUSE_SHOW_EOS_ATTRIBUTES-0}
export EOS_FUSE_INLINE_REPAIR=${EOS_FUSE_INLINE_REPAIR-1}
export EOS_FUSE_MAX_INLINE_REPAIR_SIZE=${EOS_FUSE_MAX_INLINE_REPAIR_SIZE-268435456}
export EOS_FUSE_LOG_PREFIX=${EOS_FUSE_LOG_PREFIX-$(basename $1)}
export EOS_FUSE_ENTRY_CACHE_TIME=${EOS_FUSE_ENTRY_CACHE_TIME-2}
export EOS_FUSE_ATTR_CACHE_TIME=${EOS_FUSE_ATTR_CACHE_TIME-2}
export EOS_FUSE_NEG_ENTRY_CACHE_TIME=${EOS_FUSE_NEG_ENTRY_CACHE_TIME-30}
export EOS_FUSE_CREATOR_CAP_LIFETIME=${EOS_FUSE_CREATOR_CAP_LIFETIME-30}
export EOS_FUSE_FILE_WB_CACHE_SIZE=${EOS_FUSE_FILE_WB_CACHE_SIZE-67108864}
export EOS_FUSE_MOUNTDIR=${EOS_FUSE_MOUNTDIR-/eos/}
export EOS_FUSE_REMOTEDIR=${EOS_FUSE_REMOTEDIR-${EOS_FUSE_MOUNTDIR}}
export EOS_FUSE_MAX_WB_INMEMORY_SIZE=${EOS_FUSE_MAX_WB_INMEMORY_SIZE-536870912}
export EOS_FUSE_XRDBUGNULLRESPONSE_RETRYCOUNT=${EOS_FUSE_XRDBUGNULLRESPONSE_RETRYCOUNT-3}
export EOS_FUSE_XRDBUGNULLRESPONSE_RETRYSLEEPMS=${EOS_FUSE_XRDBUGNULLRESPONSE_RETRYSLEEPMS-1}
export EOS_FUSE_RETRY_SOCKET_ERROR=${EOS_FUSE_RETRY_SOCKET_ERROR-3}
export EOS_FUSE_RETRY_CONNECTION_ERROR=${EOS_FUSE_RETRY_CONNECTION_ERROR-30}
export XRD_RUNFORKHANDLER=1
# use sss only if we don't use any of krb5 and gsi 
[[ "x$EOS_FUSE_SSS_KEYTAB" != "x" ]]  && [[ "x$EOS_FUSE_USER_KRB5CC" = "x0" || "x$EOS_FUSE_USER_KRB5CC" = "x" ]] && [[  "x$EOS_FUSE_USER_GSIPROXY" = "x0" || "x$EOS_FUSE_USER_GSIPROXY" = "x" ]] && export XrdSecSSSKT=$EOS_FUSE_SSS_KEYTAB
[[ "x$EOS_FUSE_STREAMERRORWINDOW" != "x" ]] && export XRD_STREAMERRORWINDOW=$EOS_FUSE_STREAMERRORWINDOW
# make sure that FUSE_OPT keeps the same default value
export FUSE_OPT=${FUSE_OPT-"${FUSE_OPT_SAVE}"}

if [ "x$EOS_FUSE_BIGWRITES" = "x1" ]; then
    FUSE_OPT="big_writes,"${FUSE_OPT-""}
else
    test -n "${FUSE_OPT}" && FUSE_OPT=${FUSE_OPT}","
fi

if [ ${EOSD} == "eosd3" ]; then
            # add write_back cache option
    FUSE_OPT=${FUSE_OPT}"writeback_cache,"
fi

cd /var/run/eos/
chmod 700 ${EOS_FUSE_MOUNTDIR}

unset KRB5CCNAME
unset X509_USER_CERT
unset X509_USER_KEY
ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}
ulimit -n 65000

echo "EOS_FUSE_PING_TIMEOUT            : ${EOS_FUSE_PING_TIMEOUT}"
echo "EOS_FUSE_DEBUG                   : ${EOS_FUSE_DEBUG}"
echo "EOS_FUSE_LOWLEVEL_DEBUG          : ${EOS_FUSE_DEBUG}"
echo "EOS_FUSE_NOACCESS                : ${EOS_FUSE_NOACCESS}"
echo "EOS_FUSE_SYNC                    : ${EOS_FUSE_SYNC}"
echo "EOS_FUSE_KERNELCACHE             : ${EOS_FUSE_KERNELCACHE}"
echo "EOS_FUSE_DIRECTIO                : ${EOS_FUSE_DIRECTIO}"
echo "EOS_FUSE_CACHE                   : ${EOS_FUSE_CACHE}"
echo "EOS_FUSE_CACHE_SIZE              : ${EOS_FUSE_CACHE_SIZE}"
echo "EOS_FUSE_CACHE_PAGE_SIZE         : ${EOS_FUSE_CACHE_PAGE_SIZE}"
echo "EOS_FUSE_BIGWRITES               : ${EOS_FUSE_BIGWRITES}"
echo "EOS_FUSE_EXEC                    : ${EOS_FUSE_EXEC}"
echo "EOS_FUSE_NO_MT                   : ${EOS_FUSE_NO_MT}"
echo "EOS_FUSE_SSS_KEYTAB              : ${EOS_FUSE_SSS_KEYTAB}"
echo "EOS_FUSE_USER_KRB5CC             : ${EOS_FUSE_USER_KRB5CC}"
echo "EOS_FUSE_USER_GSIPROXY           : ${EOS_FUSE_USER_GSIPROXY}"
echo "EOS_FUSE_USER_KRB5FIRST          : ${EOS_FUSE_USER_KRB5FIRST}"
echo "EOS_FUSE_PIDMAP                  : ${EOS_FUSE_PIDMAP}"
echo "EOS_FUSE_RMLVL_PROTECT           : ${EOS_FUSE_RMLVL_PROTECT}"
echo "EOS_FUSE_RDAHEAD                 : ${EOS_FUSE_RDAHEAD}"
echo "EOS_FUSE_RDAHEAD_WINDOW          : ${EOS_FUSE_RDAHEAD_WINDOW}"
echo "EOS_FUSE_LAZYOPENRO              : ${EOS_FUSE_LAZYOPENRO}"
echo "EOS_FUSE_LAZYOPENRW              : ${EOS_FUSE_LAZYOPENRW}"
echo "EOS_FUSE_ASYNC_OPEN              : ${EOS_FUSE_ASYNC_OPEN}"
echo "EOS_FUSE_SHOW_SPECIAL_FILES      : ${EOS_FUSE_SHOW_SPECIAL_FILES}"
echo "EOS_FUSE_INLINE_REPAIR           : ${EOS_FUSE_INLINE_REPAIR}"
echo "EOS_FUSE_MAX_INLINE_REPAIR_SIZE  : ${EOS_FUSE_MAX_INLINE_REPAIR_SIZE}"
echo "EOS_FUSE_ATTR_CACHE_TIME         : ${EOS_FUSE_ATTR_CACHE_TIME}"
echo "EOS_FUSE_ENTRY_CACHE_TIME        : ${EOS_FUSE_ENTRY_CACHE_TIME}"
echo "EOS_FUSE_NEG_ENTRY_CACHE_TIME    : ${EOS_FUSE_NEG_ENTRY_CACHE_TIME}"
echo "EOS_FUSE_CREATOR_CAP_LIFETIME    : ${EOS_FUSE_CREATOR_CAP_LIFETIME}"
echo "EOS_FUSE_FILE_WB_CACHE_SIZE      : ${EOS_FUSE_FILE_WB_CACHE_SIZE}"
echo "EOS_FUSE_MAX_WB_INMEMORY_SIZE    : ${EOS_FUSE_MAX_WB_INMEMORY_SIZE}"
echo "EOS_FUSE_XRDBUGNULLRESPONSE_RETRYCOUNT    : ${EOS_FUSE_XRDBUGNULLRESPONSE_RETRYCOUNT}"
echo "EOS_FUSE_XRDBUGNULLRESPONSE_RETRYSLEEPMS  : ${EOS_FUSE_XRDBUGNULLRESPONSE_RETRYSLEEPMS}"
echo "EOS_FUSE_RETRY_SOCKET_ERROR      : ${EOS_FUSE_RETRY_SOCKET_ERROR}"
echo "EOS_FUSE_RETRY_CONNECTION_ERROR  : ${EOS_FUSE_RETRY_CONNECTION_ERROR}"

echo "EOS_FUSE_LOG_PREFIX              : ${EOS_FUSE_LOG_PREFIX}"
echo "EOS_FUSE_MOUNTDIR                : ${EOS_FUSE_MOUNTDIR}"
echo "EOS_FUSE_REMOTEDIR               : ${EOS_FUSE_REMOTEDIR}"

${EOS_ROOT}/bin/${EOSD} ${EOS_FUSE_MOUNTDIR} -o${FUSE_OPT-""}max_readahead=131072,max_write=4194304,fsname=eos$(basename $1),allow_other,url=root://${EOS_FUSE_MGM_ALIAS-localhost}/${EOS_FUSE_REMOTEDIR} >& /dev/null