From 18da3ffcd7f3c8a0c5f790c801b5813503c2273d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:03:56 +0200 Subject: Adding upstream version 31+20240202. Signed-off-by: Daniel Baumann --- tools/remove.c | 153 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 tools/remove.c (limited to 'tools/remove.c') diff --git a/tools/remove.c b/tools/remove.c new file mode 100644 index 0000000..387ef0e --- /dev/null +++ b/tools/remove.c @@ -0,0 +1,153 @@ +/* + * kmod-remove - remove modules from the kernel. + * + * Copyright (C) 2015 Intel Corporation. All rights reserved. + * Copyright (C) 2011-2013 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 . + */ + +#include +#include +#include +#include + +#include + +#include "kmod.h" + +static const char cmdopts_s[] = "h"; +static const struct option cmdopts[] = { + {"help", no_argument, 0, 'h'}, + { } +}; + +static void help(void) +{ + printf("Usage:\n" + "\t%s remove [options] module\n" + "Options:\n" + "\t-h, --help show this help\n", + program_invocation_short_name); +} + +static int check_module_inuse(struct kmod_module *mod) { + struct kmod_list *holders; + int state, ret; + + state = kmod_module_get_initstate(mod); + + if (state == KMOD_MODULE_BUILTIN) { + ERR("Module %s is builtin.\n", kmod_module_get_name(mod)); + return -ENOENT; + } else if (state < 0) { + ERR("Module %s is not currently loaded\n", + kmod_module_get_name(mod)); + return -ENOENT; + } + + holders = kmod_module_get_holders(mod); + if (holders != NULL) { + struct kmod_list *itr; + + ERR("Module %s is in use by:", kmod_module_get_name(mod)); + + kmod_list_foreach(itr, holders) { + struct kmod_module *hm = kmod_module_get_module(itr); + fprintf(stderr, " %s", kmod_module_get_name(hm)); + kmod_module_unref(hm); + } + fputc('\n', stderr); + + kmod_module_unref_list(holders); + return -EBUSY; + } + + ret = kmod_module_get_refcnt(mod); + if (ret > 0) { + ERR("Module %s is in use\n", kmod_module_get_name(mod)); + return -EBUSY; + } else if (ret == -ENOENT) { + ERR("Module unloading is not supported\n"); + } + + return ret; +} + +static int do_remove(int argc, char *argv[]) +{ + struct kmod_ctx *ctx; + struct kmod_module *mod; + const char *name; + int err, r = EXIT_SUCCESS; + + for (;;) { + int c, idx =0; + c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx); + if (c == -1) + break; + switch (c) { + case 'h': + help(); + return EXIT_SUCCESS; + + default: + ERR("Unexpected getopt_long() value '%c'.\n", c); + return EXIT_FAILURE; + } + } + + if (optind >= argc) { + ERR("Missing module name\n"); + return EXIT_FAILURE; + } + + ctx = kmod_new(NULL, NULL); + if (!ctx) { + ERR("kmod_new() failed!\n"); + return EXIT_FAILURE; + } + + name = argv[optind]; + err = kmod_module_new_from_name(ctx, name, &mod); + if (err < 0) { + ERR("Could not remove module %s: %s\n", name, strerror(-err)); + goto end; + } + + err = check_module_inuse(mod); + if (err < 0) + goto unref; + + err = kmod_module_remove_module(mod, 0); + if (err < 0) + goto unref; + +unref: + kmod_module_unref(mod); + +end: + kmod_unref(ctx); + if (err < 0) { + r = EXIT_FAILURE; + ERR("Could not remove module %s: %s\n", name, strerror(-err)); + } + return r; +} + +const struct kmod_cmd kmod_cmd_remove = { + .name = "remove", + .cmd = do_remove, + .help = "remove module from kernel", +}; -- cgit v1.2.3