3rd-party/linux-kernel-module-cheat
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Create debugfs files directly on debugfs root instead of a subdirectory

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This commit is contained in:
Ciro Santilli
2017-07-14 11:24:52 +01:00
parent d4ed593451
commit 1918c4fdfe
10 changed files with 21 additions and 26 deletions
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7
kernel_module/ioctl.c
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@@ -28,7 +28,7 @@ Documentation/ioctl/ioctl-number.txt has some info:
MODULE_LICENSE("GPL");
static struct dentry *dir;
static struct dentry *debugfs_file;
static long unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long argp)
{
@@ -76,17 +76,16 @@ static const struct file_operations fops = {
static int myinit(void)
{
dir = debugfs_create_dir("lkmc_ioctl", 0);
/* ioctl permissions are not automatically restricted by rwx as for read / write,
* but we could of course implement that ourselves:
* https://stackoverflow.com/questions/29891803/user-permission-check-on-ioctl-command */
debugfs_create_file("f", 0, dir, NULL, &fops);
debugfs_file = debugfs_create_file("lkmc_ioctl", 0, NULL, NULL, &fops);
return 0;
}
static void myexit(void)
{
debugfs_remove_recursive(dir);
debugfs_remove(debugfs_file);
}
module_init(myinit)