| 1 | // SPDX-License-Identifier: GPL-2.0-only |
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| 2 | #include <linux/kernel.h> |
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| 3 | #include <linux/module.h> |
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| 4 | #include <linux/netdevice.h> |
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| 5 | |
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| 6 | #include "notifier-error-inject.h" |
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| 7 | |
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| 8 | static int priority; |
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| 9 | module_param(priority, int, 0); |
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| 10 | MODULE_PARM_DESC(priority, "specify netdevice notifier priority" ); |
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| 11 | |
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| 12 | static struct notifier_err_inject netdev_notifier_err_inject = { |
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| 13 | .actions = { |
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| 14 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_REGISTER) }, |
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| 15 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEMTU) }, |
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| 16 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGENAME) }, |
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| 17 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_UP) }, |
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| 18 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRE_TYPE_CHANGE) }, |
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| 19 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_POST_INIT) }, |
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| 20 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEMTU) }, |
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| 21 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_PRECHANGEUPPER) }, |
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| 22 | { NOTIFIER_ERR_INJECT_ACTION(NETDEV_CHANGEUPPER) }, |
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| 23 | {} |
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| 24 | } |
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| 25 | }; |
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| 26 | |
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| 27 | static struct dentry *dir; |
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| 28 | |
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| 29 | static int netdev_err_inject_init(void) |
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| 30 | { |
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| 31 | int err; |
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| 32 | |
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| 33 | dir = notifier_err_inject_init(name: "netdev" , parent: notifier_err_inject_dir, |
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| 34 | err_inject: &netdev_notifier_err_inject, priority); |
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| 35 | if (IS_ERR(ptr: dir)) |
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| 36 | return PTR_ERR(ptr: dir); |
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| 37 | |
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| 38 | err = register_netdevice_notifier(nb: &netdev_notifier_err_inject.nb); |
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| 39 | if (err) |
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| 40 | debugfs_remove_recursive(dentry: dir); |
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| 41 | |
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| 42 | return err; |
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| 43 | } |
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| 44 | |
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| 45 | static void netdev_err_inject_exit(void) |
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| 46 | { |
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| 47 | unregister_netdevice_notifier(nb: &netdev_notifier_err_inject.nb); |
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| 48 | debugfs_remove_recursive(dentry: dir); |
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| 49 | } |
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| 50 | |
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| 51 | module_init(netdev_err_inject_init); |
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| 52 | module_exit(netdev_err_inject_exit); |
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| 53 | |
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| 54 | MODULE_DESCRIPTION("Netdevice notifier error injection module" ); |
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| 55 | MODULE_LICENSE("GPL" ); |
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| 56 | MODULE_AUTHOR("Nikolay Aleksandrov <razor@blackwall.org>" ); |
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| 57 | |
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