https://github.com/torvalds/linux
Revision 9e36c633951acb33e250e75b209b04217ce7b86c authored by Will Deacon on 25 July 2014, 00:53:54 UTC, committed by Linus Torvalds on 29 August 2014, 18:18:45 UTC
write{b,w,l,q}_relaxed are implemented by some architectures in order to permit memory-mapped I/O writes with weaker barrier semantics than the non-relaxed variants. This patch implements these write macros for Alpha, in the same vein as the relaxed read macros, which are already implemented. Acked-by: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 5691e44
Tip revision: 9e36c633951acb33e250e75b209b04217ce7b86c authored by Will Deacon on 25 July 2014, 00:53:54 UTC
alpha: io: implement relaxed accessor macros for writes
alpha: io: implement relaxed accessor macros for writes
Tip revision: 9e36c63
crypto.c
/*
* AppArmor security module
*
* This file contains AppArmor policy loading interface function definitions.
*
* Copyright 2013 Canonical Ltd.
*
* 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.
*
* Fns to provide a checksum of policy that has been loaded this can be
* compared to userspace policy compiles to check loaded policy is what
* it should be.
*/
#include <crypto/hash.h>
#include "include/apparmor.h"
#include "include/crypto.h"
static unsigned int apparmor_hash_size;
static struct crypto_shash *apparmor_tfm;
unsigned int aa_hash_size(void)
{
return apparmor_hash_size;
}
int aa_calc_profile_hash(struct aa_profile *profile, u32 version, void *start,
size_t len)
{
struct {
struct shash_desc shash;
char ctx[crypto_shash_descsize(apparmor_tfm)];
} desc;
int error = -ENOMEM;
u32 le32_version = cpu_to_le32(version);
if (!apparmor_tfm)
return 0;
profile->hash = kzalloc(apparmor_hash_size, GFP_KERNEL);
if (!profile->hash)
goto fail;
desc.shash.tfm = apparmor_tfm;
desc.shash.flags = 0;
error = crypto_shash_init(&desc.shash);
if (error)
goto fail;
error = crypto_shash_update(&desc.shash, (u8 *) &le32_version, 4);
if (error)
goto fail;
error = crypto_shash_update(&desc.shash, (u8 *) start, len);
if (error)
goto fail;
error = crypto_shash_final(&desc.shash, profile->hash);
if (error)
goto fail;
return 0;
fail:
kfree(profile->hash);
profile->hash = NULL;
return error;
}
static int __init init_profile_hash(void)
{
struct crypto_shash *tfm;
if (!apparmor_initialized)
return 0;
tfm = crypto_alloc_shash("sha1", 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(tfm)) {
int error = PTR_ERR(tfm);
AA_ERROR("failed to setup profile sha1 hashing: %d\n", error);
return error;
}
apparmor_tfm = tfm;
apparmor_hash_size = crypto_shash_digestsize(apparmor_tfm);
aa_info_message("AppArmor sha1 policy hashing enabled");
return 0;
}
late_initcall(init_profile_hash);
Computing file changes ...