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1 if [ ! "$_MEDIA_NFS_SUBR" ]; then _MEDIA_NFS_SUBR=1
2 #
3 # Copyright (c) 2012-2013 Devin Teske
4 # All rights reserved.
5 #
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions
8 # are met:
9 # 1. Redistributions of source code must retain the above copyright
10 #    notice, this list of conditions and the following disclaimer.
11 # 2. Redistributions in binary form must reproduce the above copyright
12 #    notice, this list of conditions and the following disclaimer in the
13 #    documentation and/or other materials provided with the distribution.
14 #
15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 # SUCH DAMAGE.
26 #
27 # $FreeBSD$
28 #
29 ############################################################ INCLUDES
30
31 BSDCFG_SHARE="/usr/share/bsdconfig"
32 . $BSDCFG_SHARE/common.subr || exit 1
33 f_dprintf "%s: loading includes..." media/nfs.subr
34 f_include $BSDCFG_SHARE/device.subr
35 f_include $BSDCFG_SHARE/dialog.subr
36 f_include $BSDCFG_SHARE/media/common.subr
37 f_include $BSDCFG_SHARE/media/network.subr
38 f_include $BSDCFG_SHARE/media/tcpip.subr
39 f_include $BSDCFG_SHARE/struct.subr
40 f_include $BSDCFG_SHARE/variable.subr
41
42 BSDCFG_LIBE="/usr/libexec/bsdconfig"
43 f_include_lang $BSDCFG_LIBE/include/messages.subr
44
45 ############################################################ GLOBALS
46
47 NFS_MOUNTED=
48
49 ############################################################ FUNCTIONS
50
51 # f_media_set_nfs
52 #
53 # Return success if we both found and set the media type to be an NFS server.
54 # Variables from variable.subr that can be used to script user input:
55 #
56 #       VAR_NFS_PATH
57 #               The NFS path specification (host:path) to use when mounting the
58 #               remote repository.
59 #       VAR_NAMESERVER [Optional]
60 #               Automatically populated from resolv.conf(5) but can be
61 #               overridden. If set, the host portion of VAR_NFS_PATH is
62 #               looked up using f_host_lookup() from `tcpip.subr'.
63 #
64 # Meanwhile, the following variables from variable.subr are set after
65 # successful execution:
66 #
67 #       VAR_NFS_HOST
68 #               The host portion of the NFS path specification, parsed from
69 #               VAR_NFS_PATH.
70 #
71 f_media_set_nfs()
72 {
73         local nfs
74
75         f_media_close
76
77         f_variable_get_value $VAR_NFS_PATH \
78                 "$msg_please_enter_the_full_nfs_file_specification"
79         f_getvar $VAR_NFS_PATH nfs
80         [ "$nfs" ] || return $FAILURE
81
82         case "$nfs" in
83         *:*) : valid NFS path ;;
84         *)
85                 f_show_msg "$msg_invalid_nfs_path_specification"
86                 return $FAILURE
87         esac
88
89         f_struct_new DEVICE device_nfs
90         device_nfs set name "$nfs"
91
92         if ! f_struct device_network ||
93            ! f_dialog_yesno "$msg_youve_already_done_the_network_configuration"
94         then
95                 f_struct device_network &&
96                         f_device_shutdown network
97                 f_device_select_tcp || return $FAILURE
98                 local dev
99                 f_getvar $VAR_NETWORK_DEVICE dev
100                 f_struct_copy "device_$dev" device_network
101         fi
102         f_device_init network ||
103                 f_dprintf "%s: $msg_net_device_init_failed\n" f_media_set_nfs
104
105         local hostname="${nfs%%:*}"
106         if f_isset $VAR_NAMESERVER && ! {
107                 f_validate_ipaddr "$hostname" || f_validate_ipaddr6 "$hostname"
108         }; then
109                 f_show_info "$msg_looking_up_host" "$hostname"
110                 f_dprintf "%s Looking up hostname, %s, using host(1)" \
111                           "f_media_set_nfs" "$hostname"
112                 if ! f_quietly f_host_lookup "$hostname"; then
113                         f_show_msg "$msg_cannot_resolve_hostname" "$hostname"
114                         f_struct device_network &&
115                                 f_device_shutdown network
116                         f_struct_free device_network
117                         unset $VAR_NFS_PATH
118                         return $FAILURE
119                 fi
120                 f_dprintf "Found DNS entry for %s successfully." "$hostname"
121         fi
122
123         setvar $VAR_NFS_HOST "$hostname"
124
125         device_nfs set type     $DEVICE_TYPE_NFS
126         device_nfs set init     f_media_init_nfs
127         device_nfs set get      f_media_get_nfs
128         device_nfs set shutdown f_media_shutdown_nfs
129         device_nfs set private  device_network # in name only (deref'd later)
130
131         f_struct_copy device_nfs device_media
132         f_struct_free device_nfs
133
134         return $SUCCESS
135 }
136
137 # f_media_init_nfs $device
138 #
139 # Initializes the NFS media device. Returns success if able to mount the NFS
140 # device using mount_nfs(1).
141 #
142 # The variables (from variable.subr) used to initialize the NFS mount are as
143 # follows (all of which are configured manually/optionally from the options
144 # menu):
145 #
146 #       VAR_NFS_TCP [Optional]
147 #               If non-NULL, adds the "tcp" option via `-o' to mount_nfs(8).
148 #       VAR_NFS_V3 [Optional]
149 #               If non-NULL, adds the "nfsv3" option via `-o' to mount_nfs(8).
150 #       VAR_NFS_SECURE [Optional]
151 #               If non-NULL, adds the "-P" flag to mount_nfs(8).
152 #       VAR_SLOW_ETHER [Optional]
153 #               If non-NULL, adjusts the read/write size to avoid timeouts.
154 #
155 f_media_init_nfs()
156 {
157         local dev="$1" name err
158
159         device_$dev get name name || return $FAILURE
160         f_dprintf "Init routine called for NFS device. name=[%s]" \
161                   "$name"
162
163         if [ "$NFS_MOUNTED" ]; then
164                 f_dprintf "NFS device already mounted."
165                 return $SUCCESS
166         fi
167
168         if ! f_device_init network; then
169                 f_dprintf "f_media_init_nfs: %s" "$msg_net_device_init_failed"
170                 return $FAILURE
171         fi
172
173         if [ ! -e "$MOUNTPOINT" ] &&
174            ! err=$( mkdir -p "$MOUNTPOINT" 2>&1 )
175         then
176                 f_dialog_msgbox "$err"
177                 return $FAILURE
178         fi
179
180         local cp tcp="" use3="" secure="" readsize=4096 writesize=4096
181         f_getvar $VAR_NFS_TCP cp
182         [ "$cp" = "YES" ] && tcp=1
183         f_getvar $VAR_NFS_V3 cp
184         [ "$cp" = "YES" ] && use3=1
185         f_getvar $VAR_NFS_SECURE cp
186         [ "$cp" = "YES" ] && secure=1
187         f_getvar $VAR_SLOW_ETHER cp
188         [ "$cp" = "YES" ] && readsize=1024 writesize=1024
189
190         local options="rsize=$readsize,wsize=$writesize"
191         [ "$use3" ] && options="$options,nfsv3"
192         [ "$tcp" ] && options="$options,tcp"
193
194         if ! err=$( mount_nfs \
195                 ${secure:+-P} -o "$options" "$name" "$MOUNTPOINT" 2>&1 )
196         then
197                 err="${err#mount_nfs: }"
198                 f_show_msg "$msg_error_mounting_device" \
199                            "$name" "$MOUNTPOINT" "$err"
200                 f_struct device_network &&
201                         f_device_shutdown network
202                 return $FAILURE
203         fi
204         NFS_MOUNTED=1
205
206         f_dprintf "Mounted NFS device %s onto %s" "$name" "$MOUNTPOINT"
207
208         return $SUCCESS
209 }
210
211 # f_media_get_nfs $device $file [$probe_type]
212 #
213 # Returns data from $file on a mounted NFS device. Similar to cat(1). If
214 # $probe_type is present and non-NULL, returns success if $file exists. If
215 # $probe_type is equal to $PROBE_SIZE, prints the size of $file in bytes to
216 # standard-out.
217 #
218 f_media_get_nfs()
219 {
220         local dev="$1" file="$2" probe_type="$3"
221
222         f_dprintf "f_media_get_nfs: dev=[%s] file=[%s] probe_type=%s" \
223                   "$dev" "$file" "$probe_type"
224
225         f_media_generic_get "$MOUNTPOINT" "$file" "$probe_type"
226 }
227
228 # f_media_shutdown_nfs $device
229 #
230 # Shuts down the NFS device using umount(8). Return status should be ignored.
231 #
232 f_media_shutdown_nfs()
233 {
234         local dev="$1" err
235
236         [ "$NFS_MOUNTED" ] || return $FAILURE
237
238         f_dprintf "Unmounting NFS partition on %s" "$MOUNTPOINT"
239         if ! err=$( umount -f "$MOUNTPOINT" 2>&1 ); then
240                 err="${err#umount: }"; err="${err#*: }"
241                 f_show_msg "$msg_could_not_unmount_the_nfs_partition" \
242                            "$MOUNTPOINT" "$err"
243         else
244                 NFS_MOUNTED=
245         fi
246 }
247
248 ############################################################ MAIN
249
250 f_dprintf "%s: Successfully loaded." media/nfs.subr
251
252 fi # ! $_MEDIA_NFS_SUBR