DragonFly On-Line Manual Pages

DIRFS(5)                 DragonFly File Formats Manual                DIRFS(5)

NAME
     dirfs -- pseudo-filesystem for vkernel

SYNOPSIS
     To compile this driver into the vkernel, place the following line in your
     vkernel configuration file:

           options DIRFS

     Actually this driver does not provide a loadable module.

     In fstab(5):
     /usr/src     /mnt dirfs rw 0 0

DESCRIPTION
     dirfs was born from the idea of providing an easy way for vkernel(7) to
     access host's directories without any sort of configuration as it would
     be needed by NFS for example.

     It runs directly in the vkernel's VFS(9) code, as any other regular
     filesystem but it uses syscalls to retrieve the information needed for
     every operation requested.

     It should be noted that when the vkernel is run by a regular user, the
     operations dirfs can perform on the mounted host directory are bound to
     the permissions of the aforementioned user.

     Multiple dirfs mounts are allowed.

EXAMPLES
     To mount a dirfs memory file system:

           mount -t dirfs /usr/src /mnt

SEE ALSO
     fstab(5), mount_dirfs(8)

HISTORY
     The dirfs driver first appeared in DragonFly 3.5.

AUTHORS
     The dirfs vkernel implementation was written from the scratch by Antonio
     Huete Jimenez <tuxillo@quantumachine.net>

     Numerous fixes and pointers by Matthew Dillon
     <dillon@apollo.backplane.com>

     This manual page was written by Antonio Huete Jimenez
     <tuxillo@quantumachine.net>

BUGS
     Currently there is no locking on file descriptors between the host and
     the vkernel.  This means that there might be problems with concurrent
     accesses to the same file.

     There is no support for hardlinks in dirfs yet.

DragonFly 4.9                  September 5, 2013                 DragonFly 4.9