openwrt/upstream - upstream openwrt

about summary refs log tree commit diff stats

path: root/package/libs/libnl-tiny/src/include/netlink/data.h

diff options

Diffstat (limited to 'package/libs/libnl-tiny/src/include/netlink/data.h')

0 files changed, 0 insertions, 0 deletions

id='n83' href='#n83'>83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431

#
# Copyright (c) 2005 IBM Corporation
# Copyright (c) 2005 XenSource Ltd.
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

dir=$(dirname "$0")
. "$dir/logging.sh"
. "$dir/locking.sh"

VTPMDB="/var/vtpm/vtpm.db"

#In the vtpm-impl file some commands should be defined:
#      vtpm_create, vtpm_setup, vtpm_start, etc. (see below)
if [ -r "$dir/vtpm-impl.alt" ]; then
	. "$dir/vtpm-impl.alt"
elif [ -r "$dir/vtpm-impl" ]; then
	. "$dir/vtpm-impl"
else
	function vtpm_create () {
		true
	}
	function vtpm_setup() {
		true
	}
	function vtpm_start() {
		true
	}
	function vtpm_suspend() {
		true
	}
	function vtpm_resume() {
		true
	}
	function vtpm_delete() {
		true
	}
	function vtpm_migrate() {
		echo "Error: vTPM migration accross machines not implemented."
	}
	function vtpm_migrate_local() {
		echo "Error: local vTPM migration not supported"
	}
	function vtpm_migrate_recover() {
		true
	}
fi


#Find the instance number for the vtpm given the name of the domain
# Parameters
# - vmname : the name of the vm
# Return value
#  Returns '0' if instance number could not be found, otherwise
#  it returns the instance number in the variable 'instance'
function vtpmdb_find_instance () {
	local vmname ret instance
	vmname=$1
	ret=0

	instance=$(cat $VTPMDB |                   \
	          awk -vvmname=$vmname             \
	          '{                               \
	             if ( 1 != index($1,"#")) {    \
	               if ( $1 == vmname ) {       \
	                 print $2;                 \
	                 exit;                     \
	               }                           \
	             }                             \
	           }')
	if [ "$instance" != "" ]; then
		ret=$instance
	fi
	echo "$ret"
}


# Check whether a particular instance number is still available
# returns "0" if it is not available, "1" otherwise.
function vtpmdb_is_free_instancenum () {
	local instance instances avail i
	instance=$1
	avail=1
	#Allowed instance number range: 1-255
	if [ $instance -eq 0 -o $instance -gt 255 ]; then
		avail=0
	else
		instances=$(cat $VTPMDB |                \
		           gawk                          \
		           '{                            \
		               if (1 != index($1,"#")) { \
		                 printf("%s ",$2);       \
		               }                         \
		            }')
		for i in $instances; do
			if [ $i -eq $instance ]; then
				avail=0
				break
			fi
		done
	fi
	echo "$avail"
}


# Get an available instance number given the database
# Returns an unused instance number
function vtpmdb_get_free_instancenum () {
	local ctr instances don found
	instances=$(cat $VTPMDB |                \
	           gawk                          \
	           '{                            \
	               if (1 != index($1,"#")) { \
	                 printf("%s ",$2);       \
	               }                         \
	            }')
	ctr=1
	don=0
	while [ $don -eq 0 ]; do
		found=0
		for i in $instances; do
			if [ $i -eq $ctr ]; then
				found=1;
				break;
			fi
		done

		if [ $found -eq 0 ]; then
			don=1
			break
		fi
		let ctr=ctr+1
	done
	echo "$ctr"
}


# Add a domain name and instance number to the DB file
function vtpmdb_add_instance () {
	local res vmname inst
	vmname=$1
	inst=$2

	if [ ! -f $VTPMDB ]; then
		echo "#Database for VM to vTPM association" > $VTPMDB
		echo "#1st column: domain name" >> $VTPMDB
		echo "#2nd column: TPM instance number" >> $VTPMDB
	fi
	res=$(vtpmdb_validate_entry $vmname $inst)
	if [ $res -eq 0 ]; then
		echo "$vmname $inst" >> $VTPMDB
	fi
}


#Validate whether an entry is the same as passed to this
#function
function vtpmdb_validate_entry () {
	local res rc vmname inst
	rc=0
	vmname=$1
	inst=$2

	res=$(cat $VTPMDB |            \
	     gawk -vvmname=$vmname     \
	          -vinst=$inst         \
	     '{                        \
	         if ( 1 == index($1,"#")) {\
	         } else                \
	         if ( $1 == vmname &&  \
	              $2 == inst) {    \
	            printf("1");       \
	            exit;              \
	         } else                \
	         if ( $1 == vmname ||  \
	              $2 == inst) {    \
	            printf("2");       \
	            exit;              \
	         }                     \
	     }')

	if [ "$res" == "1" ]; then
		rc=1
	elif [ "$res" == "2" ]; then
		rc=2
	fi
	echo "$rc"
}


#Remove an entry from the vTPM database given its domain name
#and instance number
function vtpmdb_remove_entry () {
	local vmname instance VTPMDB_TMP
	vmname=$1
	instance=$2
	VTPMDB_TMP="$VTPMDB".tmp

	$(cat $VTPMDB |            \
	 gawk -vvmname=$vmname     \
	 '{                        \
	    if ( $1 != vmname ) {  \
	      print $0;            \
	    }                      \
	 '} > $VTPMDB_TMP)
	if [ -e $VTPMDB_TMP ]; then
		mv -f $VTPMDB_TMP $VTPMDB
		vtpm_delete $instance
	else
		log err "Error creating temporary file '$VTPMDB_TMP'."
	fi
}


# Find the reason for the creation of this device:
# Returns 'resume' or 'create'
function vtpm_get_create_reason () {
	local resume
	resume=$(xenstore_read $XENBUS_PATH/resume)
	if [ "$resume" == "True" ]; then
		echo "resume"
	else
		echo "create"
	fi
}


#Create a vTPM instance
# If no entry in the TPM database is found, the instance is
# created and an entry added to the database.
function vtpm_create_instance () {
	local res instance domname reason uuid
	uuid=$(xenstore_read "$XENBUS_PATH"/uuid)
	reason=$(vtpm_get_create_reason)

	claim_lock vtpmdb

	instance="0"

	if [ "$uuid" != "" ]; then
		instance=$(vtpmdb_find_instance $uuid)
	fi
	if [ "$instance" == "0" ]; then
		domname=$(xenstore_read "$XENBUS_PATH"/domain)
		instance=$(vtpmdb_find_instance $domname)
	fi

	if [ "$instance" == "0" -a "$reason" != "create" ]; then
		release_lock vtpmdb
		return
	fi

	if [ "$instance" == "0" ]; then
		#Try to give the preferred instance to the domain
		instance=$(xenstore_read "$XENBUS_PATH"/pref_instance)
		if [ "$instance" != "" ]; then
			res=$(vtpmdb_is_free_instancenum $instance)
			if [ $res -eq 0 ]; then
				instance=$(vtpmdb_get_free_instancenum)
			fi
		else
			instance=$(vtpmdb_get_free_instancenum)
		fi

		vtpm_create $instance

		if [ $vtpm_fatal_error -eq 0 ]; then
			if [ "$uuid" != "" ]; then
				vtpmdb_add_instance $uuid $instance
			else
				vtpmdb_add_instance $domname $instance
			fi
		fi
	else
		if [ "$reason" == "resume" ]; then
			vtpm_resume $instance
		else
			vtpm_start $instance
		fi
	fi

	release_lock vtpmdb

	xenstore_write $XENBUS_PATH/instance $instance
}


#Remove an instance when a VM is terminating or suspending.
#Since it is assumed that the VM will appear again, the
#entry is kept in the VTPMDB file.
function vtpm_remove_instance () {
	local instance reason domname uuid
	#Stop script execution quietly if path does not exist (anymore)
	xenstore-exists "$XENBUS_PATH"/domain
	uuid=$(xenstore_read "$XENBUS_PATH"/uuid)

	claim_lock vtpmdb

	instance="0"

	if [ "$uuid != "" ]; then
		instance=$(vtpmdb_find_instance $uuid)
	fi

	if [ "$instance == "0" ]; then
		domname=$(xenstore_read "$XENBUS_PATH"/domain)
		instance=$(vtpmdb_find_instance $domname)
	fi

	if [ "$instance" != "0" ]; then
		vtpm_suspend $instance
	fi

	release_lock vtpmdb
}


#Remove an entry in the VTPMDB file given the domain's name
#1st parameter: The name of the domain
function vtpm_delete_instance () {
	local instance

	claim_lock vtpmdb

	instance=$(vtpmdb_find_instance $1)
	if [ "$instance" != "0" ]; then
		vtpmdb_remove_entry $1 $instance
	fi

	release_lock vtpmdb
}

# Determine whether the given address is local to this machine
# Return values:
#  "-1" : the given machine name is invalid
#  "0"  : this is not an address of this machine
#  "1"  : this is an address local to this machine
function vtpm_isLocalAddress() {
	local addr res
	addr=$(ping $1 -c 1 |  \
	       gawk '{ print substr($3,2,length($3)-2); exit }')
	if [ "$addr" == "" ]; then
		echo "-1"
		return
	fi
	res=$(ifconfig | grep "inet addr" |  \
	     gawk -vaddr=$addr               \
	     '{                              \
	        if ( addr == substr($2, 6)) {\
	          print "1";                 \
	        }                            \
	     }'                              \
	    )
	if [ "$res" == "" ]; then
		echo "0"
		return
	fi
	echo "1"
}

# Perform a migration step. This function differentiates between migration
# to the local host or to a remote machine.
# Parameters:
# 1st: destination host to migrate to
# 2nd: name of the domain to migrate
# 3rd: the migration step to perform
function vtpm_migration_step() {
	local res=$(vtpm_isLocalAddress $1)
	if [ "$res" == "0" ]; then
		vtpm_migrate $1 $2 $3
	else
		vtpm_migrate_local
	fi
}

# Recover from migration due to an error. This function differentiates
# between migration to the local host or to a remote machine.
# Parameters:
# 1st: destination host the migration was going to
# 2nd: name of the domain that was to be migrated
# 3rd: the last successful migration step that was done
function vtpm_recover() {
	local res
	res=$(vtpm_isLocalAddress $1)
	if [ "$res" == "0" ]; then
		vtpm_migrate_recover $1 $2 $3
	fi
}


#Determine the domain id given a domain's name.
#1st parameter: name of the domain
#return value: domain id  or -1 if domain id could not be determined
function vtpm_domid_from_name () {
	local id name ids
	ids=$(xenstore-list /local/domain)
	for id in $ids; do
		name=$(xenstore_read /local/domain/$id/name)
		if [ "$name" == "$1" ]; then
			echo "$id"
			return
		fi
	done
	echo "-1"
}


#Add a virtual TPM instance number and its associated domain name
#to the VTPMDB file and activate usage of this virtual TPM instance
#by writing the instance number into the xenstore
#1st parm: name of virtual machine
#2nd parm: instance of assoicate virtual TPM
function vtpm_add_and_activate() {
	local domid=$(vtpm_domid_from_name $1)
	if [ "$domid" != "-1" ]; then
		vtpmdb_add_instance $1 $2
		xenstore-write backend/vtpm/$domid/0/instance $2
	fi
}


context:
space:
mode: