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--[[
LuCI - Lua Configuration Interface
Copyright 2008 Steven Barth <steven@midlink.org>
Copyright 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
$Id$
]]--
local io = require "io"
local os = require "os"
local fs = require "luci.fs"
local util = require "luci.util"
local ltn12 = require "luci.ltn12"
local posix = require "posix"
local type, assert, error = type, assert, error
module "luci.sys.mtdow"
local WRITE_IMAGE = 0
local WRITE_COMBINED = 1
local WRITE_EMULATED = 2
Writer = util.class()
-- x86
EmulatedWriter = util.class(Writer)
EmulatedWriter.blocks = {
image = {
magic = "eb48",
device = "/dev/hda",
write = WRITE_SEPARATELY
}
}
-- Broadcom
TRXWriter = util.class(Writer)
TRXWriter.blocks = {
image = {
magic = {"4844", "5735"},
device = "linux",
write = WRITE_COMBINED
}
}
-- Magicbox
CommonWriter = util.class(Writer)
CommonWriter.blocks = {
image = {
device = "linux",
write = WRITE_COMBINED
}
}
-- Atheros
RedWriter = util.class(Writer)
RedWriter.blocks = {
kernel = {
device = "vmlinux.bin.l7",
write = WRITE_IMAGE
},
rootfs = {
device = "rootfs",
write = WRITE_COMBINED
}
}
function EmulatedWriter.write_block(self, name, imagestream, appendpattern)
if appendpattern then
os.execute("grep rootfs /proc/mtd >/dev/null || "
.. "{ echo /dev/hda2,65536,rootfs > "
.. "/sys/module/block2mtd/parameters/block2mtd }")
end
return Writer.write_block(self, name, imagestream, appendpattern)
end
Writer.MTD = "/sbin/mtd"
Writer.SAFEMTD = "/tmp/mtd"
Writer.IMAGEFIFO = "/tmp/mtdimage.fifo"
function Writer.write_block(self, name, imagestream, appendfile)
assert(self.blocks[name], "Undefined block: " % name)
local block = self.blocks[name]
local device = block.device
device = fs.stat(device) and device or self:_find_mtdblock(device)
assert(device, "Unable to determine device file")
if block.magic then
imagestream = self:_check_magic(imagestream, block.magic)
end
assert(imagestream, "Invalid image file")
if appendfile then
if block.write == WRITE_COMBINED then
return (self:_write_combined(device, imagestream, appendfile) == 0)
elseif block.write == WRITE_EMULATED then
return (self:_write_emulated(device, imagestream, appendfile) == 0)
else
error("Appending is not supported for selected platform.")
end
else
return (self:_write_memory(device, imagestream) == 0)
end
end
function Writer._check_magic(self, imagestream, magic)
magic = type(magic) == "table" and magic or {magic}
local block = imagestream()
assert(block, "Invalid image stream")
local cm = "%x%x" % {block:byte(1), block:byte(2)}
if util.contains(magic, cm) then
return ltn12.source.cat(ltn12.source.string(block), imagestream)
end
end
function Writer._find_mtdblock(self, mtdname)
local k
local prefix = "/dev/mtdblock"
prefix = prefix .. (fs.stat(prefix) and "/" or "")
for l in io.lines("/proc/mtd") do
local k = l:match('([%w-_]+):.*-"%s"' % mtdname)
if k then return prefix..k end
end
end
function Write._write_emulated(self, devicename, imagestream, appendfile)
local stat = (self:_write_memory(device, imagestream) == 0)
stat = stat and (self:_refresh_block("rootfs") == 0)
local squash = self:_find_mtdblock("rootfs_data")
if squash then
stat = stat and (self:_append("rootfs_data", imagestream, true) == 0)
else
stat = stat and (self:_append("rootfs", imagestream) == 0)
end
return stat
end
function Writer._write_memory(self, devicename, imagestream)
local devicestream = ltn12.sink.file(io.open(devicename, "w"))
local stat, err = ltn12.pump.all(imagestream, devicestream)
if stat then
return os.execute("sync")
end
end
function Writer._write_combined(self, devicename, imagestream, appendfile)
assert(fs.copy(self.MTD, self.SAFEMTD), "Unable to copy mtd writer")
assert(posix.mkfifo(self.IMAGEFIFO), "Unable to create image pipe")
local imagefifo = io.open(self.IMAGEFIFO, "w")
assert(imagefifo, "Unable to open image pipe")
local imageproc = posix.fork()
assert(imageproc ~= -1, "Unable to fork()")
if imageproc == 0 then
ltn12.pump.all(imagestream, ltn12.sink.file(imagefifo))
os.exit(0)
end
return os.execute(
"%s -j '%s' write '%s' '%s'" % {
self.SAFEMTD, appendfile, devicename, self.IMAGEFIFO
}
)
end
function Writer._refresh_block(self, devicename)
assert(fs.copy(self.MTD, self.SAFEMTD), "Unable to copy mtd writer")
return os.execute("%s refresh '%s'" % {self.SAFEMTD, devicename})
end
function Writer._append(self, devicename, appendfile, erase)
assert(fs.copy(self.MTD, self.SAFEMTD), "Unable to copy mtd writer")
erase = erase and ("-e '%s' " % devicename) or ''
return os.execute(
"%s %s jffs2write '%s' '%s'" % {
self.SAFEMTD, erase, appendfile, devicename
}
)
end
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