diff options
author | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-13 11:45:15 -0400 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2016-06-13 11:45:15 -0400 |
commit | 28282a3f352f1be7a4ff956fbeb0bca37bb8bc64 (patch) | |
tree | 2a4bcd23e614dfc487d48a2b6d8395b9d2437016 /src/grp-udev/libudev-core/udev-builtin-kmod.c | |
parent | fc18b7fdd1286d96a4cc36b74e4da81c6ad6a326 (diff) |
./move.sh
Diffstat (limited to 'src/grp-udev/libudev-core/udev-builtin-kmod.c')
-rw-r--r-- | src/grp-udev/libudev-core/udev-builtin-kmod.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/grp-udev/libudev-core/udev-builtin-kmod.c b/src/grp-udev/libudev-core/udev-builtin-kmod.c new file mode 100644 index 0000000000..9665f678fd --- /dev/null +++ b/src/grp-udev/libudev-core/udev-builtin-kmod.c @@ -0,0 +1,123 @@ +/* + * load kernel modules + * + * Copyright (C) 2011-2012 Kay Sievers <kay@vrfy.org> + * Copyright (C) 2011 ProFUSION embedded systems + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <errno.h> +#include <libkmod.h> +#include <stdarg.h> +#include <stdio.h> +#include <stdlib.h> + +#include "string-util.h" +#include "udev.h" + +static struct kmod_ctx *ctx = NULL; + +static int load_module(struct udev *udev, const char *alias) { + struct kmod_list *list = NULL; + struct kmod_list *l; + int err; + + err = kmod_module_new_from_lookup(ctx, alias, &list); + if (err < 0) + return err; + + if (list == NULL) + log_debug("No module matches '%s'", alias); + + kmod_list_foreach(l, list) { + struct kmod_module *mod = kmod_module_get_module(l); + + err = kmod_module_probe_insert_module(mod, KMOD_PROBE_APPLY_BLACKLIST, NULL, NULL, NULL, NULL); + if (err == KMOD_PROBE_APPLY_BLACKLIST) + log_debug("Module '%s' is blacklisted", kmod_module_get_name(mod)); + else if (err == 0) + log_debug("Inserted '%s'", kmod_module_get_name(mod)); + else + log_debug("Failed to insert '%s'", kmod_module_get_name(mod)); + + kmod_module_unref(mod); + } + + kmod_module_unref_list(list); + return err; +} + +_printf_(6,0) static void udev_kmod_log(void *data, int priority, const char *file, int line, const char *fn, const char *format, va_list args) { + log_internalv(priority, 0, file, line, fn, format, args); +} + +static int builtin_kmod(struct udev_device *dev, int argc, char *argv[], bool test) { + struct udev *udev = udev_device_get_udev(dev); + int i; + + if (!ctx) + return 0; + + if (argc < 3 || !streq(argv[1], "load")) { + log_error("expect: %s load <module>", argv[0]); + return EXIT_FAILURE; + } + + for (i = 2; argv[i]; i++) { + log_debug("Execute '%s' '%s'", argv[1], argv[i]); + load_module(udev, argv[i]); + } + + return EXIT_SUCCESS; +} + +/* called at udev startup and reload */ +static int builtin_kmod_init(struct udev *udev) { + if (ctx) + return 0; + + ctx = kmod_new(NULL, NULL); + if (!ctx) + return -ENOMEM; + + log_debug("Load module index"); + kmod_set_log_fn(ctx, udev_kmod_log, udev); + kmod_load_resources(ctx); + return 0; +} + +/* called on udev shutdown and reload request */ +static void builtin_kmod_exit(struct udev *udev) { + log_debug("Unload module index"); + ctx = kmod_unref(ctx); +} + +/* called every couple of seconds during event activity; 'true' if config has changed */ +static bool builtin_kmod_validate(struct udev *udev) { + log_debug("Validate module index"); + if (!ctx) + return false; + return (kmod_validate_resources(ctx) != KMOD_RESOURCES_OK); +} + +const struct udev_builtin udev_builtin_kmod = { + .name = "kmod", + .cmd = builtin_kmod, + .init = builtin_kmod_init, + .exit = builtin_kmod_exit, + .validate = builtin_kmod_validate, + .help = "Kernel module loader", + .run_once = false, +}; |