summaryrefslogtreecommitdiff
path: root/net/bonding.sh
blob: 044ce21cfe36ce7d12e70abaf2f40b90f1569748 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>
# Released under the 2-clause BSD license.

bonding_depend()
{
	before interface macchanger
	program /sbin/ifconfig /bin/ifconfig
	# If you do not have sysfs, you MUST have this binary instead for ioctl
	# Also you will loose some functionality that cannot be done via sysfs:
	if [ ! -d /sys/class/net ]; then
		program /sbin/ifenslave
	fi
}

_config_vars="$_config_vars slaves"

_is_bond()
{
	[ -f "/proc/net/bonding/${IFACE}" ]
}

bonding_pre_start()
{
	local x= s= n= slaves= primary=

	slaves="$(_get_array "slaves_${IFVAR}")"
	unset slaves_${IFVAR}

	eval primary="\$primary_${IFVAR}"
	unset primary_${IFVAR}

	eval subsume="\$subsume_${IFVAR}"
	unset subsume_${IFVAR}


	[ -z "${slaves}" ] && return 0

	# Load the kernel module if required
	if [ ! -d /proc/net/bonding ]; then
		if ! modprobe bonding; then
			eerror "Cannot load the bonding module"
			return 1
		fi
	fi

	if [ ! -d /sys/class/net ]; then
		ewarn "sysfs is not available! You will be unable to create new bonds, or change dynamic parameters!"
	fi

	# We can create the interface name we like now, but this
	# requires sysfs
	if ! _exists && [ -d /sys/class/net ]; then
		echo "+${IFACE}" > /sys/class/net/bonding_masters
	fi
	_exists true || return 1

	if ! _is_bond; then
		eerror "${IFACE} is not capable of bonding"
		return 1
	fi

	# Interface must be down in order to configure
	_down

	# Configure the bond mode, then we can reloop to ensure we configure
	# All other options
	[ -d /sys/class/net ] && for x in /sys/class/net/"${IFACE}"/bonding/mode; do
		[ -f "${x}" ] || continue
		n=${x##*/}
		eval s=\$${n}_${IFVAR}
		if [ -n "${s}" ]; then
			einfo "Setting ${n}: ${s}"
			echo "${s}" >"${x}" || \
			eerror "Failed to configure $n (${n}_${IFVAR})"
		fi
	done
	# Configure link monitoring
	for x in /sys/class/net/"${IFACE}"/bonding/miimon; do
		[ -f "${x}" ] || continue
		n=${x##*/}
		eval s=\$${n}_${IFVAR}
		if [ -n "${s}" ]; then
			einfo "Setting ${n}: ${s}"
			echo "${s}" >"${x}" || \
			eerror "Failed to configure $n (${n}_${IFVAR})"
		fi
	done
	# Nice and dynamic for remaining options:)
	[ -d /sys/class/net ] && for x in /sys/class/net/"${IFACE}"/bonding/*; do
		[ -f "${x}" ] || continue
		n=${x##*/}
		eval s=\$${n}_${IFVAR}
		[ "${n}" != "mode" -o "${n}" != "miimon" ] || continue
		if [ -n "${s}" ]; then
			einfo "Setting ${n}: ${s}"
			echo "${s}" >"${x}" || \
			eerror "Failed to configure $n (${n}_${IFVAR})"
		fi
	done

	ebegin "Adding slaves to ${IFACE}"
	eindent
	einfo "${slaves}"

	# Check that our slaves exist
	(
	for IFACE in ${slaves}; do
		_exists true || return 1
	done

	# Unless we are subsuming an existing interface (NFS root), we down
	# slave interfaces to work around bugs supposedly in some chipsets
	# that cause failure to enslave from other states.
	if [ -z "${subsume}" ]; then
		for IFACE in ${slaves}; do
			_delete_addresses
			_down
		done
	fi
	)

	# Now force the master to up
	#  - First test for interface subsume request (required for NFS root)
	if [ -n "${subsume}" ]; then
		einfo "Subsuming ${subsume} interface characteristics."
		eindent
		local oiface=${IFACE}
		IFACE=${subsume}
		local addr="$(_get_inet_address)"
		einfo "address: ${addr}"
		IFACE=${oiface}
		unset oiface
		eoutdent
		# subsume (presumably kernel auto-)configured IP
		ifconfig ${IFACE} ${addr} up
	else
		# warn if root on nfs and no subsume interface supplied
		local root_fs_type=$(mountinfo -s /)
		if [ "${root_fs_type}" == "nfs" ]; then
			warn_nfs=1
			ewarn "NFS root detected!!!"
			ewarn " If your system crashes here, /etc/conf.d/net needs"
			ewarn " subsume_${IFACE}=\"<iface>\" ... where <iface> is the"
			ewarn " existing, (usually kernel auto-)configured interface."
		fi
		# up the interface
		_up
    fi

	# finally add in slaves
	# things needed in the process, and if they are done by ifenslave, openrc, and/or the kernel.
	# down new slave interface: ifenslave, openrc
	# set mtu: ifenslave, kernel
	# set slave MAC: ifenslave, kernel
	eoutdent
	if [ -d /sys/class/net ]; then
		sys_bonding_path=/sys/class/net/"${IFACE}"/bonding
		local oiface
		oiface=$IFACE
		if [ -n "${primary}" ]; then
			IFACE=$primary
			_down
			IFACE=$oiface
			echo "+${primary}" >$sys_bonding_path/slaves
			echo "${primary}" >$sys_bonding_path/primary
		fi
		for s in ${slaves}; do
			[ "${s}" = "${primary}" ] && continue
			if ! grep -q ${s} $sys_bonding_path/slaves; then
				IFACE=$s
				_down
				IFACE=$oiface
				echo "+${s}" >$sys_bonding_path/slaves
			fi
		done
	else
		ifenslave "${IFACE}" ${slaves} >/dev/null
	fi
	eend $?

	return 0 #important
}

bonding_stop()
{
	_is_bond || return 0

	# Wipe subsumed interface
	if [ -n "${subsume}" ]; then
		ifconfig ${subsume} 0.0.0.0
	fi

	local slaves= s=
	slaves=$( \
		sed -n -e 's/^Slave Interface: //p' "/proc/net/bonding/${IFACE}" \
		| tr '\n' ' ' \
	)
	[ -z "${slaves}" ] && return 0

	# remove all slaves
	ebegin "Removing slaves from ${IFACE}"
	eindent
	einfo "${slaves}"
	eoutdent
	if [ -d /sys/class/net ]; then
		for s in ${slaves}; do
			echo -"${s}" > /sys/class/net/"${IFACE}"/bonding/slaves
		done
	else
		ifenslave -d "${IFACE}" ${slaves}
	fi

	# reset all slaves
	(
	for IFACE in ${slaves}; do
		if _exists; then
			_delete_addresses
			_down
		fi
	done
	)

	_down

	if [ -d /sys/class/net ]; then
		echo "-${IFACE}" > /sys/class/net/bonding_masters
	fi

	eend 0
	return 0
}