From be2ea723b1d023b3d385d3b791ee4607cbfb20ca Mon Sep 17 00:00:00 2001
From: Kay Sievers <kay@vrfy.org>
Date: Sat, 30 Aug 2014 11:34:20 +0200
Subject: [PATCH] udev: remove userspace firmware loading support

---
 Makefile.am                      |  12 ---
 README                           |   9 +--
 TODO                             |   1 -
 configure.ac                     |  20 -----
 src/udev/udev-builtin-firmware.c | 154 ---------------------------------------
 src/udev/udev-builtin.c          |   3 -
 src/udev/udev.h                  |   6 --
 src/udev/udevd.c                 |  13 ----

Index: systemd-210/configure.ac
===================================================================
--- systemd-210.orig/configure.ac
+++ systemd-210/configure.ac
@@ -902,25 +902,6 @@ if test "x$have_myhostname" != "xno"; th
 fi
 
 # ------------------------------------------------------------------------------
-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@:>@]),
        [], [enable_gudev=yes])
@@ -1137,7 +1118,6 @@ 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}
Index: systemd-210/Makefile.am
===================================================================
--- systemd-210.orig/Makefile.am
+++ systemd-210/Makefile.am
@@ -2677,18 +2677,6 @@ 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
Index: systemd-210/README
===================================================================
--- systemd-210.orig/README
+++ systemd-210/README
@@ -51,14 +51,14 @@ REQUIREMENTS:
 
         Linux kernel >= 3.8 for Smack support
 
-        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:
Index: systemd-210/src/udev/udev-builtin.c
===================================================================
--- systemd-210.orig/src/udev/udev-builtin.c
+++ systemd-210/src/udev/udev-builtin.c
@@ -34,9 +34,6 @@ static const struct udev_builtin *builti
         [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,
Index: systemd-210/src/udev/udev-builtin-firmware.c
===================================================================
--- systemd-210.orig/src/udev/udev-builtin-firmware.c
+++ /dev/null
@@ -1,157 +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,
-};
Index: systemd-210/src/udev/udevd.c
===================================================================
--- systemd-210.orig/src/udev/udevd.c
+++ systemd-210/src/udev/udevd.c
@@ -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)
@@ -474,10 +471,6 @@ static int event_queue_insert(struct ude
         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
 
         udev_queue_export_device_queued(udev_queue_export, dev);
         log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev),
@@ -557,12 +550,6 @@ static bool is_devpath_busy(struct 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;
Index: systemd-210/src/udev/udev.h
===================================================================
--- systemd-210.orig/src/udev/udev.h
+++ systemd-210/src/udev/udev.h
@@ -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;
Index: systemd-210/TODO
===================================================================
--- systemd-210.orig/TODO
+++ systemd-210/TODO
@@ -541,7 +541,6 @@ 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

