From 4d28d9a7d8d69fb429955d770e53e7a81640da24 Mon Sep 17 00:00:00 2001 From: Khem Raj Date: Wed, 9 Nov 2016 20:45:23 -0800 Subject: [PATCH 15/19] Revert "udev: remove userspace firmware loading support" This reverts commit be2ea723b1d023b3d385d3b791ee4607cbfb20ca. Userspace firmware loading support is needed for Linux < 3.7. Upstream-Status: Inappropriate [OE specific] Signed-off-by: Jonathan Liu Signed-off-by: Khem Raj --- Makefile.am | 12 +++ README | 6 +- TODO | 1 + configure.ac | 18 +++++ src/udev/udev-builtin-firmware.c | 154 +++++++++++++++++++++++++++++++++++++++ src/udev/udev-builtin.c | 3 + src/udev/udev.h | 6 ++ src/udev/udevd.c | 13 ++++ 8 files changed, 210 insertions(+), 3 deletions(-) create mode 100644 src/udev/udev-builtin-firmware.c diff --git a/Makefile.am b/Makefile.am index 3010b01..229492a 100644 --- a/Makefile.am +++ b/Makefile.am @@ -3791,6 +3791,18 @@ 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 diff --git a/README b/README index 9f5bc93..f60ae11 100644 --- a/README +++ b/README @@ -50,14 +50,14 @@ REQUIREMENTS: CONFIG_PROC_FS CONFIG_FHANDLE (libudev, mount and bind mount handling) - udev will fail to work with the legacy sysfs 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 not supported and should - be disabled in the kernel: + Userspace firmware loading is deprecated, will go away, and + sometimes causes problems: CONFIG_FW_LOADER_USER_HELPER=n Some udev rules and virtualization detection relies on it: diff --git a/TODO b/TODO index baaac94..1ab1691 100644 --- a/TODO +++ b/TODO @@ -658,6 +658,7 @@ Features: * initialize the hostname from the fs label of /, if /etc/hostname does not exist? * 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 diff --git a/configure.ac b/configure.ac index dfc0bd3..1de0066 100644 --- a/configure.ac +++ b/configure.ac @@ -1394,6 +1394,23 @@ AM_CONDITIONAL(HAVE_MYHOSTNAME, [test "$have_myhostname" = "yes"]) AC_ARG_ENABLE(hwdb, [AC_HELP_STRING([--disable-hwdb], [disable hardware database support])], enable_hwdb=$enableval, enable_hwdb=yes) AM_CONDITIONAL(ENABLE_HWDB, [test x$enable_hwdb = xyes]) +AC_ARG_WITH(firmware-path, + AS_HELP_STRING([--with-firmware-path=DIR[[[:DIR[...]]]]], + [Firmware search path (default="")]), + [], [with_firmware_path=""]) +OLD_IFS=$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"]) # ------------------------------------------------------------------------------ have_manpages=no @@ -1698,6 +1715,7 @@ AC_MSG_RESULT([ SysV init scripts: ${SYSTEM_SYSVINIT_PATH} SysV rc?.d directories: ${SYSTEM_SYSVRCND_PATH} Build Python: ${PYTHON} + firmware path: ${FIRMWARE_PATH} PAM modules dir: ${with_pamlibdir} PAM configuration dir: ${with_pamconfdir} D-Bus policy dir: ${with_dbuspolicydir} diff --git a/src/udev/udev-builtin-firmware.c b/src/udev/udev-builtin-firmware.c new file mode 100644 index 0000000..bd8c2fb --- /dev/null +++ b/src/udev/udev-builtin-firmware.c @@ -0,0 +1,154 @@ +/* + * firmware - Kernel firmware loader + * + * Copyright (C) 2009 Piter Punk + * Copyright (C) 2009-2011 Kay Sievers + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#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, +}; diff --git a/src/udev/udev-builtin.c b/src/udev/udev-builtin.c index e6b36f1..cd9947e 100644 --- a/src/udev/udev-builtin.c +++ b/src/udev/udev-builtin.c @@ -31,6 +31,9 @@ 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, diff --git a/src/udev/udev.h b/src/udev/udev.h index 8433e8d..d32366d 100644 --- a/src/udev/udev.h +++ b/src/udev/udev.h @@ -148,6 +148,9 @@ 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, @@ -176,6 +179,9 @@ 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; diff --git a/src/udev/udevd.c b/src/udev/udevd.c index d336ee0..81e5dc5 100644 --- a/src/udev/udevd.c +++ b/src/udev/udevd.c @@ -125,6 +125,9 @@ struct event { bool is_block; sd_event_source *timeout_warning; sd_event_source *timeout; +#ifdef HAVE_FIRMWARE + bool nodelay; +#endif }; static inline struct event *node_to_event(struct udev_list_node *node) { @@ -613,6 +616,10 @@ static int event_queue_insert(Manager *manager, 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)); @@ -698,6 +705,12 @@ static bool is_devpath_busy(Manager *manager, 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; -- 2.10.2