2 .\" Copyright (c) 2013 Antonio Huete Jimenez <tuxillo@quantumachine.net>
3 .\" All rights reserved.
5 .\" Redistribution and use in source and binary forms, with or without
6 .\" modification, are permitted provided that the following conditions
8 .\" 1. Redistributions of source code must retain the above copyright
9 .\" notice, this list of conditions and the following disclaimer.
10 .\" 2. Redistributions in binary form must reproduce the above copyright
11 .\" notice, this list of conditions and the following disclaimer in the
12 .\" documentation and/or other materials provided with the distribution.
13 .\" 3. The name of the author may not be used to endorse or promote products
14 .\" derived from this software without specific prior written permission
16 .\" THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 .\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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33 .Nd "pseudo-filesystem for vkernel"
35 To compile this driver into the vkernel,
36 place the following line in your
37 vkernel configuration file:
38 .Bd -ragged -offset indent
42 Actually this driver does not provide a loadable module.
47 /usr/src /mnt dirfs rw 0 0
50 was born from the idea of providing an easy way for
52 to access host's directories without any sort of configuration as it would be
53 needed by NFS for example.
55 It runs directly in the vkernel's
57 code, as any other regular filesystem but it uses syscalls to retrieve the
58 information needed for every operation requested.
60 It should be noted that when the vkernel is run by a regular user, the
63 can perform on the mounted host directory are bound to the permissions of
64 the aforementioned user.
74 .Dl "mount -t dirfs /usr/src /mnt"
81 driver first appeared in
87 vkernel implementation was written from the scratch by
88 .An Antonio Huete Jimenez Aq Mt tuxillo@quantumachine.net
90 Numerous fixes and pointers by
91 .An Matthew Dillon Aq Mt dillon@apollo.backplane.com
93 This manual page was written by
94 .An Antonio Huete Jimenez Aq Mt tuxillo@quantumachine.net
96 Currently there is no locking on file descriptors between the host
98 This means that there might be problems with concurrent accesses to the same
101 There is no support for hardlinks in