How to enable on-access scanning using the redirfs module

If you want to use the AVG 8.5 for Linux/FreeBSD on-access scanning feature, it is needed to use two kernel modules (avflt and redirfs). Please follow the steps below to install and setup these modules:

• Download redirfs and avflt packages
  Packages are available here: http://www.redirfs.org
• Unpack both tar.gz archives (X character stands for version number)
  # tar xzvf redirfs-X.X.tar.gz
  # tar xzvf avflt-X.X.tar.gz

Redirfs

• Enter the extracted redirfs directory
  # cd redirfs-X.X
• Run make command
  # make -C /lib/modules/`uname -r`/build M=`pwd` modules
• Switch to "root" account using the "su" command (if you are not logged as root already)
• Install module
  # make -C /lib/modules/`uname -r`/build M=`pwd` modules_install
• Load redirfs.ko module
  # modprobe redirfs

Note: It may be necessary to update module dependencies before module loading. Please use the following command: # depmod -a

Avflt

• Enter the extracted avflt directory
  # cd ../avflt-X.X
• Copy the redirfs´s Module.symvers file to this avflt directory
  # cp ../redirfs-0.6/Module.symvers ./
• Compile the module
  # make -C /lib/modules/`uname -r`/build M=`pwd` EXTRA_CFLAGS=-I<path to the redirfs> modules
  Note: <path to the redirfs> represents the path to the dir with source files of redirfs as extracted during the previous steps.
  Example: # make -C /lib/modules/`uname -r`/build M=`pwd` EXTRA_CFLAGS=-I/root/redirfs-0.6 modules
  
• Install module
  # make -C /lib/modules/`uname -r`/build M=`pwd` EXTRA_CFLAGS=-I<path to the redirfs> modules_install
  Note: "EXTRA_CFLAGS=-I<path to the redirfs>" refers to the same dir as previous command.
• Load avflt.ko module
  # modprobe avflt

Note: It may be necessary to update module dependencies before module loading. Please use the following command: # depmod -a

Final steps

• Change the AVG configuration
  Please change Default.oad.avflt.paths.include option
  Example:
  # avgcfgctl -w Default.oad.avflt.paths.include="|/home|"
• Start AVG
  # avgctl --start

Note: In default configuration, Default.oad.use=avflt option is already set so it is not necessary to change it.

Detailed information regarding the modules installation can be found in the INSTALL file.