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udev: remove userspace firmware loading support

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This commit is contained in:
Kay Sievers 2014-08-30 11:34:20 +02:00
parent ec15977a3c
commit be2ea723b1
8 changed files with 4 additions and 214 deletions
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12
Makefile.am
View file

@ -3284,18 +3284,6 @@ libudev_core_la_LIBADD = \
$(BLKID_LIBS) \
$(KMOD_LIBS)
libudev_core_la_CPPFLAGS = \
$(AM_CPPFLAGS) \
-DFIRMWARE_PATH="$(FIRMWARE_PATH)"
if ENABLE_FIRMWARE
libudev_core_la_SOURCES += \
src/udev/udev-builtin-firmware.c
dist_udevrules_DATA += \
rules/50-firmware.rules
endif
if HAVE_KMOD
libudev_core_la_SOURCES += \
src/udev/udev-builtin-kmod.c

9
README
View file

@ -37,8 +37,7 @@ LICENSE:
- except src/udev/* which is (currently still) GPLv2, GPLv2+
REQUIREMENTS:
Linux kernel >= 3.0
Linux kernel >= 3.3 for loop device partition support features with nspawn
Linux kernel >= 3.7
Linux kernel >= 3.8 for Smack support
Kernel Config Options:
@ -53,14 +52,14 @@ REQUIREMENTS:
CONFIG_PROC_FS
CONFIG_FHANDLE (libudev, mount and bind mount handling)
Udev will fail to work with the legacy layout:
udev will fail to work with the legacy sysfs layout:
CONFIG_SYSFS_DEPRECATED=n
Legacy hotplug slows down the system and confuses udev:
CONFIG_UEVENT_HELPER_PATH=""
Userspace firmware loading is deprecated, will go away, and
sometimes causes problems:
Userspace firmware loading is not supported and should
be disabled in the kernel:
CONFIG_FW_LOADER_USER_HELPER=n
Some udev rules and virtualization detection relies on it:

1
TODO
View file

@ -547,7 +547,6 @@ Features:
* ExecOnFailure=/usr/bin/foo
* udev:
- remove src/udev/udev-builtin-firmware.c (CONFIG_FW_LOADER_USER_HELPER=n)
- move to LGPL
- kill scsi_id
- add trigger --subsystem-match=usb/usb_device device

20
configure.ac
View file

@ -1153,25 +1153,6 @@ if test "x$enable_myhostname" != "xno"; then
fi
AM_CONDITIONAL(HAVE_MYHOSTNAME, [test "$have_myhostname" = "yes"])
# ------------------------------------------------------------------------------
AC_ARG_WITH(firmware-path,
AS_HELP_STRING([--with-firmware-path=DIR[[[:DIR[...]]]]],
[Firmware search path (default="")]),
[], [with_firmware_path=""])
OLD_IFS=$IFS
IFS=:
for i in $with_firmware_path; do
if test "x${FIRMWARE_PATH}" = "x"; then
FIRMWARE_PATH="\\\"${i}/\\\""
else
FIRMWARE_PATH="${FIRMWARE_PATH}, \\\"${i}/\\\""
fi
done
IFS=$OLD_IFS
AC_SUBST(FIRMWARE_PATH)
AS_IF([test "x${FIRMWARE_PATH}" != "x"], [ AC_DEFINE(HAVE_FIRMWARE, 1, [Define if FIRMWARE is available]) ])
AM_CONDITIONAL(ENABLE_FIRMWARE, [test "x${FIRMWARE_PATH}" != "x"])
# ------------------------------------------------------------------------------
AC_ARG_ENABLE([gudev],
AS_HELP_STRING([--disable-gudev], [disable Gobject libudev support @<:@default=enabled@:>@]),
@ -1409,7 +1390,6 @@ AC_MSG_RESULT([
Build Python: ${PYTHON}
Installation Python: ${PYTHON_BINARY}
sphinx binary: ${SPHINX_BUILD}
firmware path: ${FIRMWARE_PATH}
PAM modules dir: ${with_pamlibdir}
PAM configuration dir: ${with_pamconfdir}
D-Bus policy dir: ${with_dbuspolicydir}

154
src/udev/udev-builtin-firmware.c
View file

@ -1,154 +0,0 @@
/*
* firmware - Kernel firmware loader
*
* Copyright (C) 2009 Piter Punk <piterpunk@slackware.com>
* Copyright (C) 2009-2011 Kay Sievers <kay@vrfy.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program 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
* General Public License for more details:*
*/
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <getopt.h>
#include <errno.h>
#include <stdbool.h>
#include <sys/utsname.h>
#include <sys/stat.h>
#include "udev.h"
static bool set_loading(struct udev *udev, char *loadpath, const char *state) {
FILE *ldfile;
ldfile = fopen(loadpath, "we");
if (ldfile == NULL) {
log_error("error: can not open '%s'", loadpath);
return false;
};
fprintf(ldfile, "%s\n", state);
fclose(ldfile);
return true;
}
static bool copy_firmware(struct udev *udev, const char *source, const char *target, size_t size) {
char *buf;
FILE *fsource = NULL, *ftarget = NULL;
bool ret = false;
buf = malloc(size);
if (buf == NULL) {
log_error("No memory available to load firmware file");
return false;
}
log_debug("writing '%s' (%zi) to '%s'", source, size, target);
fsource = fopen(source, "re");
if (fsource == NULL)
goto exit;
ftarget = fopen(target, "we");
if (ftarget == NULL)
goto exit;
if (fread(buf, size, 1, fsource) != 1)
goto exit;
if (fwrite(buf, size, 1, ftarget) == 1)
ret = true;
exit:
if (ftarget != NULL)
fclose(ftarget);
if (fsource != NULL)
fclose(fsource);
free(buf);
return ret;
}
static int builtin_firmware(struct udev_device *dev, int argc, char *argv[], bool test) {
struct udev *udev = udev_device_get_udev(dev);
static const char *searchpath[] = { FIRMWARE_PATH };
char loadpath[UTIL_PATH_SIZE];
char datapath[UTIL_PATH_SIZE];
char fwpath[UTIL_PATH_SIZE];
const char *firmware;
FILE *fwfile = NULL;
struct utsname kernel;
struct stat statbuf;
unsigned int i;
int rc = EXIT_SUCCESS;
firmware = udev_device_get_property_value(dev, "FIRMWARE");
if (firmware == NULL) {
log_error("firmware parameter missing");
rc = EXIT_FAILURE;
goto exit;
}
/* lookup firmware file */
uname(&kernel);
for (i = 0; i < ELEMENTSOF(searchpath); i++) {
strscpyl(fwpath, sizeof(fwpath), searchpath[i], kernel.release, "/", firmware, NULL);
fwfile = fopen(fwpath, "re");
if (fwfile != NULL)
break;
strscpyl(fwpath, sizeof(fwpath), searchpath[i], firmware, NULL);
fwfile = fopen(fwpath, "re");
if (fwfile != NULL)
break;
}
strscpyl(loadpath, sizeof(loadpath), udev_device_get_syspath(dev), "/loading", NULL);
if (fwfile == NULL) {
log_debug("did not find firmware file '%s'", firmware);
rc = EXIT_FAILURE;
/*
* Do not cancel the request in the initrd, the real root might have
* the firmware file and the 'coldplug' run in the real root will find
* this pending request and fulfill or cancel it.
* */
if (!in_initrd())
set_loading(udev, loadpath, "-1");
goto exit;
}
if (stat(fwpath, &statbuf) < 0 || statbuf.st_size == 0) {
if (!in_initrd())
set_loading(udev, loadpath, "-1");
rc = EXIT_FAILURE;
goto exit;
}
if (!set_loading(udev, loadpath, "1"))
goto exit;
strscpyl(datapath, sizeof(datapath), udev_device_get_syspath(dev), "/data", NULL);
if (!copy_firmware(udev, fwpath, datapath, statbuf.st_size)) {
log_error("error sending firmware '%s' to device", firmware);
set_loading(udev, loadpath, "-1");
rc = EXIT_FAILURE;
goto exit;
};
set_loading(udev, loadpath, "0");
exit:
if (fwfile)
fclose(fwfile);
return rc;
}
const struct udev_builtin udev_builtin_firmware = {
.name = "firmware",
.cmd = builtin_firmware,
.help = "kernel firmware loader",
.run_once = true,
};

3
src/udev/udev-builtin.c
View file

@ -34,9 +34,6 @@ static const struct udev_builtin *builtins[] = {
[UDEV_BUILTIN_BLKID] = &udev_builtin_blkid,
#endif
[UDEV_BUILTIN_BTRFS] = &udev_builtin_btrfs,
#ifdef HAVE_FIRMWARE
[UDEV_BUILTIN_FIRMWARE] = &udev_builtin_firmware,
#endif
[UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,
[UDEV_BUILTIN_INPUT_ID] = &udev_builtin_input_id,
[UDEV_BUILTIN_KEYBOARD] = &udev_builtin_keyboard,

6
src/udev/udev.h
View file

@ -141,9 +141,6 @@ enum udev_builtin_cmd {
UDEV_BUILTIN_BLKID,
#endif
UDEV_BUILTIN_BTRFS,
#ifdef HAVE_FIRMWARE
UDEV_BUILTIN_FIRMWARE,
#endif
UDEV_BUILTIN_HWDB,
UDEV_BUILTIN_INPUT_ID,
UDEV_BUILTIN_KEYBOARD,
@ -172,9 +169,6 @@ struct udev_builtin {
extern const struct udev_builtin udev_builtin_blkid;
#endif
extern const struct udev_builtin udev_builtin_btrfs;
#ifdef HAVE_FIRMWARE
extern const struct udev_builtin udev_builtin_firmware;
#endif
extern const struct udev_builtin udev_builtin_hwdb;
extern const struct udev_builtin udev_builtin_input_id;
extern const struct udev_builtin udev_builtin_keyboard;

13
src/udev/udevd.c
View file

@ -100,9 +100,6 @@ struct event {
dev_t devnum;
int ifindex;
bool is_block;
#ifdef HAVE_FIRMWARE
bool nodelay;
#endif
};
static inline struct event *node_to_event(struct udev_list_node *node) {
@ -458,10 +455,6 @@ static int event_queue_insert(struct udev_device *dev) {
event->devnum = udev_device_get_devnum(dev);
event->is_block = streq("block", udev_device_get_subsystem(dev));
event->ifindex = udev_device_get_ifindex(dev);
#ifdef HAVE_FIRMWARE
if (streq(udev_device_get_subsystem(dev), "firmware"))
event->nodelay = true;
#endif
log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev),
udev_device_get_action(dev), udev_device_get_subsystem(dev));
@ -538,12 +531,6 @@ static bool is_devpath_busy(struct event *event) {
return true;
}
#ifdef HAVE_FIRMWARE
/* allow to bypass the dependency tracking */
if (event->nodelay)
continue;
#endif
/* parent device event found */
if (event->devpath[common] == '/') {
event->delaying_seqnum = loop_event->seqnum;