#include #include "notifier-error-inject.h" static int debugfs_errno_set(void *data, u64 val) { *(int *)data = clamp_t(int, val, -MAX_ERRNO, 0); return 0; } static int debugfs_errno_get(void *data, u64 *val) { *val = *(int *)data; return 0; } DEFINE_SIMPLE_ATTRIBUTE(fops_errno, debugfs_errno_get, debugfs_errno_set, "%lld\n"); static struct dentry *debugfs_create_errno(const char *name, umode_t mode, struct dentry *parent, int *value) { return debugfs_create_file(name, mode, parent, value, &fops_errno); } static int notifier_err_inject_callback(struct notifier_block *nb, unsigned long val, void *p) { int err = 0; struct notifier_err_inject *err_inject = container_of(nb, struct notifier_err_inject, nb); struct notifier_err_inject_action *action; for (action = err_inject->actions; action->name; action++) { if (action->val == val) { err = action->error; break; } } if (err) pr_info("Injecting error (%d) to %s\n", err, action->name); return notifier_from_errno(err); } struct dentry *notifier_err_inject_dir; EXPORT_SYMBOL_GPL(notifier_err_inject_dir); struct dentry *notifier_err_inject_init(const char *name, struct dentry *parent, struct notifier_err_inject *err_inject, int priority) { struct notifier_err_inject_action *action; umode_t mode = S_IFREG | S_IRUSR | S_IWUSR; struct dentry *dir; struct dentry *actions_dir; err_inject->nb.notifier_call = notifier_err_inject_callback; err_inject->nb.priority = priority; dir = debugfs_create_dir(name, parent); if (!dir) return ERR_PTR(-ENOMEM); actions_dir = debugfs_create_dir("actions", dir); if (!actions_dir) goto fail; for (action = err_inject->actions; action->name; action++) { struct dentry *action_dir; action_dir = debugfs_create_dir(action->name, actions_dir); if (!action_dir) goto fail; /* * Create debugfs r/w file containing action->error. If * notifier call chain is called with action->val, it will * fail with the error code */ if (!debugfs_create_errno("error", mode, action_dir, &action->error)) goto fail; } return dir; fail: debugfs_remove_recursive(dir); return ERR_PTR(-ENOMEM); } EXPORT_SYMBOL_GPL(notifier_err_inject_init); static int __init err_inject_init(void) { notifier_err_inject_dir = debugfs_create_dir("notifier-error-inject", NULL); if (!notifier_err_inject_dir) return -ENOMEM; return 0; } static void __exit err_inject_exit(void) { debugfs_remove_recursive(notifier_err_inject_dir); } module_init(err_inject_init); module_exit(err_inject_exit); MODULE_DESCRIPTION("Notifier error injection module"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Akinobu Mita "); submit' value='search'/>
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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-15 10:03:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-15 10:03:15 -0700
commit9ffc66941df278c9f4df979b6bcf6c6ddafedd16 (patch)
treea2cff20aafb7ecb352a0c2dd41a5430f64a248e0 /include/dt-bindings/clock/gxbb-clkc.h
parent133d970e0dadf7b413db19893acc5b26664bf4a1 (diff)
parent0766f788eb727e2e330d55d30545db65bcf2623f (diff)
Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull gcc plugins update from Kees Cook: "This adds a new gcc plugin named "latent_entropy". It is designed to extract as much possible uncertainty from a running system at boot time as possible, hoping to capitalize on any possible variation in CPU operation (due to runtime data differences, hardware differences, SMP ordering, thermal timing variation, cache behavior, etc). At the very least, this plugin is a much more comprehensive example for how to manipulate kernel code using the gcc plugin internals" * tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: latent_entropy: Mark functions with __latent_entropy gcc-plugins: Add latent_entropy plugin
Diffstat (limited to 'include/dt-bindings/clock/gxbb-clkc.h')