svn commit: r283223 - in stable/10: etc etc/autofs usr.sbin/autofs
Edward Tomasz Napierala
trasz at FreeBSD.org
Thu May 21 13:08:32 UTC 2015
Author: trasz
Date: Thu May 21 13:08:30 2015
New Revision: 283223
URL: https://svnweb.freebsd.org/changeset/base/283223
Log:
MFC r275681:
Add "-media" autofs map, to access data on removable media, such as CD
drives or flash keys. It can be enabled by uncommenting a single entry
in default /etc/auto_master. It can also be easily modified to use
fuse-based filesystems instead of in-kernel ones.
There is still one deficiency - the mountpoints are permanent, they
don't disappear when user removes the media. Fixing it needs some
autofs changes.
Relnotes: yes
Sponsored by: The FreeBSD Foundation
Added:
stable/10/etc/autofs/special_media
- copied unchanged from r275681, head/etc/autofs/special_media
Modified:
stable/10/etc/auto_master
stable/10/etc/autofs/Makefile
stable/10/etc/devd.conf
stable/10/usr.sbin/autofs/auto_master.5
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/etc/auto_master
==============================================================================
--- stable/10/etc/auto_master Thu May 21 13:04:14 2015 (r283222)
+++ stable/10/etc/auto_master Thu May 21 13:08:30 2015 (r283223)
@@ -3,3 +3,6 @@
# Automounter master map, see auto_master(5) for details.
#
/net -hosts -nobrowse,nosuid
+# When using the -media special map, make sure to edit devd.conf(5)
+# to move the call to "automount -c" out of the comments section.
+#/media -media -nosuid
Modified: stable/10/etc/autofs/Makefile
==============================================================================
--- stable/10/etc/autofs/Makefile Thu May 21 13:04:14 2015 (r283222)
+++ stable/10/etc/autofs/Makefile Thu May 21 13:08:30 2015 (r283223)
@@ -1,6 +1,6 @@
# $FreeBSD$
-FILES= include_ldap special_hosts special_null
+FILES= include_ldap special_hosts special_media special_null
NO_OBJ=
FILESDIR= /etc/autofs
Copied: stable/10/etc/autofs/special_media (from r275681, head/etc/autofs/special_media)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/etc/autofs/special_media Thu May 21 13:08:30 2015 (r283223, copy of r275681, head/etc/autofs/special_media)
@@ -0,0 +1,93 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# Print newline-separated list of devices available for mounting.
+# If there is a filesystem label - use it, otherwise use device name.
+print_available() {
+ local _fstype _fstype_and_label _label _p
+
+ for _p in ${providers}; do
+ _fstype_and_label="$(fstyp -l "/dev/${_p}" 2> /dev/null)"
+ if [ $? -ne 0 ]; then
+ # Ignore devices for which we were unable
+ # to determine filesystem type.
+ continue
+ fi
+
+ _fstype="${_fstype_and_label%% *}"
+ if [ "${_fstype}" != "${_fstype_and_label}" ]; then
+ _label="${_fstype_and_label#* }"
+ echo "${_label}"
+ continue
+ fi
+
+ echo "${_p}"
+ done
+}
+
+# Print a single map entry.
+print_one() {
+ local _fstype _fstype_and_label _label _key _p
+
+ _key="$1"
+
+ _fstype="$(fstyp "/dev/${_key}" 2> /dev/null)"
+ if [ $? -eq 0 ]; then
+ echo "-fstype=${_fstype},nosuid :/dev/${_key}"
+ return
+ fi
+
+ for _p in ${providers}; do
+ _fstype_and_label="$(fstyp -l "/dev/${_p}" 2> /dev/null)"
+ if [ $? -ne 0 ]; then
+ # Ignore devices for which we were unable
+ # to determine filesystem type.
+ continue
+ fi
+
+ _fstype="${_fstype_and_label%% *}"
+ if [ "${_fstype}" = "${_fstype_and_label}" ]; then
+ # No label, try another device.
+ continue
+ fi
+
+ _label="${_fstype_and_label#* }"
+ if [ "${_label}" != "${_key}" ]; then
+ # Labels don't match, try another device.
+ continue
+ fi
+
+ echo "-fstype=${_fstype},nosuid :/dev/${_p}"
+ done
+
+ # No matching device - don't print anything, autofs will handle it.
+}
+
+# Obtain a list of (geom-provider-name, access-count) pairs, turning this:
+#
+# z0xfffff80005085d00 [shape=hexagon,label="ada0\nr2w2e3\nerr#0\nsector=512\nstripe=0"];
+#
+# Into this:
+#
+# ada0 r2w2e3
+#
+# XXX: It would be easier to use kern.geom.conftxt instead, but it lacks
+# access counts.
+pairs=$(sysctl kern.geom.confdot | sed -n 's/^.*hexagon,label="\([^\]*\)\\n\([^\]*\).*/\1 \2/p')
+
+# Obtain a list of GEOM providers that are not already open - not mounted,
+# and without other GEOM class, such as gpart, attached. In other words,
+# grep for "r0w0e0". Skip providers with names containing slashes; we're
+# not interested in geom_label(4) creations.
+providers=$(echo "$pairs" | awk '$2 == "r0w0e0" && $1 !~ /\// { print $1 }')
+
+if [ $# -eq 0 ]; then
+ print_available
+ exit 0
+fi
+
+print_one "$1"
+exit 0
+
Modified: stable/10/etc/devd.conf
==============================================================================
--- stable/10/etc/devd.conf Thu May 21 13:04:14 2015 (r283222)
+++ stable/10/etc/devd.conf Thu May 21 13:08:30 2015 (r283223)
@@ -318,4 +318,16 @@ notify 0 {
action "/usr/local/etc/rc.d/postgresql restart";
};
+# Discard autofs caches, useful for the -media special map. The one
+# second delay is for GEOM to finish tasting.
+#
+# XXX: We should probably have a devctl(4) event that fires after GEOM
+# tasting.
+#
+notify 100 {
+ match "system" "DEVFS";
+ match "cdev" "(da|mmcsd)[0-9]+";
+ action "sleep 1 && /usr/sbin/automount -c";
+};
+
*/
Modified: stable/10/usr.sbin/autofs/auto_master.5
==============================================================================
--- stable/10/usr.sbin/autofs/auto_master.5 Thu May 21 13:04:14 2015 (r283222)
+++ stable/10/usr.sbin/autofs/auto_master.5 Thu May 21 13:08:30 2015 (r283223)
@@ -27,7 +27,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd November 21, 2014
+.Dd November 22, 2014
.Dt AUTO_MASTER 5
.Os
.Sh NAME
@@ -213,14 +213,17 @@ Supported special maps are:
.Pp
.Bl -tag -width "-hosts" -compact
.It Li -hosts
-This map queries the remote NFS server and maps exported volumes.
-It is traditionally mounted on
+Query the remote NFS server and map exported shares.
+This map is traditionally mounted on
.Pa /net .
-It enables access to files on a remote NFS server by accessing
+Access to files on a remote NFS server is provided through the
.Pa /net/nfs-server-ip/share-name/
-directory, without the need for any further configuration.
+directory without any additional configuration.
+.It Li -media
+Query devices that are not yet mounted, but contain valid filesystems.
+Generally used to access files on removable media.
.It Li -null
-This map prevents the
+Prevent
.Xr automountd 8
from mounting anything on the mountpoint.
.El
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