/* * Copyright (C) 2010 IBM Corporation * * Authors: * Mimi Zohar * * 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, version 2 of the License. * * File: evm_secfs.c * - Used to signal when key is on keyring * - Get the key and enable EVM */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include "evm.h" static struct dentry *evm_init_tpm; /** * evm_read_key - read() for /evm * * @filp: file pointer, not actually used * @buf: where to put the result * @count: maximum to send along * @ppos: where to start * * Returns number of bytes read or error code, as appropriate */ static ssize_t evm_read_key(struct file *filp, char __user *buf, size_t count, loff_t *ppos) { char temp[80]; ssize_t rc; if (*ppos != 0) return 0; sprintf(temp, "%d", evm_initialized); rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp)); return rc; } /** * evm_write_key - write() for /evm * @file: file pointer, not actually used * @buf: where to get the data from * @count: bytes sent * @ppos: where to start * * Used to signal that key is on the kernel key ring. * - get the integrity hmac key from the kernel key ring * - create list of hmac protected extended attributes * Returns number of bytes written or error code, as appropriate */ static ssize_t evm_write_key(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { char temp[80]; int i; if (!capable(CAP_SYS_ADMIN) || (evm_initialized & EVM_INIT_HMAC)) return -EPERM; if (count >= sizeof(temp) || count == 0) return -EINVAL; if (copy_from_user(temp, buf, count) != 0) return -EFAULT; temp[count] = '\0'; if ((sscanf(temp, "%d", &i) != 1) || (i != 1)) return -EINVAL; evm_init_key(); return count; } static const struct file_operations evm_key_ops = { .read = evm_read_key, .write = evm_write_key, }; int __init evm_init_secfs(void) { int error = 0; evm_init_tpm = securityfs_create_file("evm", S_IRUSR | S_IRGRP, NULL, NULL, &evm_key_ops); if (!evm_init_tpm || IS_ERR(evm_init_tpm)) error = -EFAULT; return error; } 6329029d7188487a5c32e86ef471977'>diff
path: root/include/soc/tegra/bpmp.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2017-01-18 11:13:41 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-01-18 11:13:41 -0800
commitca92e6c7e6329029d7188487a5c32e86ef471977 (patch)
tree704fb5c2ca533cdb569826522eed0dbbcf31f316 /include/soc/tegra/bpmp.h
parent0b75f821ec8be459dd4dec77be39595d989d77ac (diff)
parent4205e4786d0b9fc3b4fec7b1910cf645a0468307 (diff)
Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull SMP hotplug update from Thomas Gleixner: "This contains a trivial typo fix and an extension to the core code for dynamically allocating states in the prepare stage. The extension is necessary right now because we need a proper way to unbreak LTTNG, which iscurrently non functional due to the removal of the notifiers. Surely it's out of tree, but it's widely used by distros. The simple solution would have been to reserve a state for LTTNG, but I'm not fond about unused crap in the kernel and the dynamic range, which we admittedly should have done right away, allows us to remove quite some of the hardcoded states, i.e. those which have no ordering requirements. So doing the right thing now is better than having an smaller intermediate solution which needs to be reworked anyway" * 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: cpu/hotplug: Provide dynamic range for prepare stage perf/x86/amd/ibs: Fix typo after cleanup state names in cpu/hotplug
Diffstat (limited to 'include/soc/tegra/bpmp.h')