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Message-Id: <20180315153433.3724071-1-arnd@arndb.de>
Date: Thu, 15 Mar 2018 16:34:08 +0100
From: Arnd Bergmann <arnd@...db.de>
To: Kees Cook <keescook@...omium.org>,
Anton Vorontsov <anton@...msg.org>,
Colin Cross <ccross@...roid.com>,
Tony Luck <tony.luck@...el.com>
Cc: Arnd Bergmann <arnd@...db.de>,
Geliang Tang <geliangtang@...il.com>,
Al Viro <viro@...iv.linux.org.uk>,
Thomas Gleixner <tglx@...utronix.de>,
Hirofumi Nakagawa <nklabs@...il.com>,
Yang Shi <yang.s@...baba-inc.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] pstore: fix crypto dependencies
The new crypto API use causes some problems with Kconfig dependencies,
including this link error:
fs/pstore/platform.o: In function `pstore_register':
platform.c:(.text+0x248): undefined reference to `crypto_has_alg'
platform.c:(.text+0x2a0): undefined reference to `crypto_alloc_base'
fs/pstore/platform.o: In function `pstore_unregister':
platform.c:(.text+0x498): undefined reference to `crypto_destroy_tfm'
crypto/lz4hc.o: In function `lz4hc_sdecompress':
lz4hc.c:(.text+0x1a): undefined reference to `LZ4_decompress_safe'
crypto/lz4hc.o: In function `lz4hc_decompress_crypto':
lz4hc.c:(.text+0x5a): undefined reference to `LZ4_decompress_safe'
crypto/lz4hc.o: In function `lz4hc_scompress':
lz4hc.c:(.text+0xaa): undefined reference to `LZ4_compress_HC'
crypto/lz4hc.o: In function `lz4hc_mod_init':
lz4hc.c:(.init.text+0xf): undefined reference to `crypto_register_alg'
lz4hc.c:(.init.text+0x1f): undefined reference to `crypto_register_scomp'
lz4hc.c:(.init.text+0x2f): undefined reference to `crypto_unregister_alg'
The problem is that with CONFIG_CRYPTO=m, we must not 'select CRYPTO_LZ4'
from a bool symbol, or call crypto API functions from a built-in
module.
This turns the sub-options into 'tristate' ones so the dependencies
are honored, and makes the pstore itself select the crypto core
if necessary.
Fixes: cb3bee0369bc ("pstore: Use crypto compress API")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
fs/pstore/Kconfig | 19 ++++++++++---------
fs/pstore/platform.c | 22 +++++++++++-----------
2 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index 49b407eab846..09c19ef91526 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -1,5 +1,6 @@
config PSTORE
tristate "Persistent store support"
+ select CRYPTO if PSTORE_COMPRESS
default n
help
This option enables generic access to platform level
@@ -13,7 +14,7 @@ config PSTORE
say N.
config PSTORE_DEFLATE_COMPRESS
- bool "DEFLATE (ZLIB) compression"
+ tristate "DEFLATE (ZLIB) compression"
default y
depends on PSTORE
select CRYPTO_DEFLATE
@@ -22,21 +23,21 @@ config PSTORE_DEFLATE_COMPRESS
algorithm support.
config PSTORE_LZO_COMPRESS
- bool "LZO compression"
+ tristate "LZO compression"
depends on PSTORE
select CRYPTO_LZO
help
This option enables LZO compression algorithm support.
config PSTORE_LZ4_COMPRESS
- bool "LZ4 compression"
+ tristate "LZ4 compression"
depends on PSTORE
select CRYPTO_LZ4
help
This option enables LZ4 compression algorithm support.
config PSTORE_LZ4HC_COMPRESS
- bool "LZ4HC compression"
+ tristate "LZ4HC compression"
depends on PSTORE
select CRYPTO_LZ4HC
help
@@ -70,19 +71,19 @@ choice
The default compression algorithm is deflate.
config PSTORE_DEFLATE_COMPRESS_DEFAULT
- bool "deflate" if PSTORE_DEFLATE_COMPRESS=y
+ bool "deflate" if PSTORE_DEFLATE_COMPRESS
config PSTORE_LZO_COMPRESS_DEFAULT
- bool "lzo" if PSTORE_LZO_COMPRESS=y
+ bool "lzo" if PSTORE_LZO_COMPRESS
config PSTORE_LZ4_COMPRESS_DEFAULT
- bool "lz4" if PSTORE_LZ4_COMPRESS=y
+ bool "lz4" if PSTORE_LZ4_COMPRESS
config PSTORE_LZ4HC_COMPRESS_DEFAULT
- bool "lz4hc" if PSTORE_LZ4HC_COMPRESS=y
+ bool "lz4hc" if PSTORE_LZ4HC_COMPRESS
config PSTORE_842_COMPRESS_DEFAULT
- bool "842" if PSTORE_842_COMPRESS=y
+ bool "842" if PSTORE_842_COMPRESS
endchoice
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 42e111b3bd0c..1143ef351c58 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -28,10 +28,10 @@
#include <linux/console.h>
#include <linux/module.h>
#include <linux/pstore.h>
-#ifdef CONFIG_PSTORE_LZO_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_LZO_COMPRESS)
#include <linux/lzo.h>
#endif
-#if defined(CONFIG_PSTORE_LZ4_COMPRESS) || defined(CONFIG_PSTORE_LZ4HC_COMPRESS)
+#if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS) || IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS)
#include <linux/lz4.h>
#endif
#include <linux/crypto.h>
@@ -142,7 +142,7 @@ bool pstore_cannot_block_path(enum kmsg_dump_reason reason)
}
EXPORT_SYMBOL_GPL(pstore_cannot_block_path);
-#ifdef CONFIG_PSTORE_DEFLATE_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_DEFLATE_COMPRESS)
static int zbufsize_deflate(size_t size)
{
size_t cmpr;
@@ -171,21 +171,21 @@ static int zbufsize_deflate(size_t size)
}
#endif
-#ifdef CONFIG_PSTORE_LZO_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_LZO_COMPRESS)
static int zbufsize_lzo(size_t size)
{
return lzo1x_worst_compress(size);
}
#endif
-#if defined(CONFIG_PSTORE_LZ4_COMPRESS) || defined(CONFIG_PSTORE_LZ4HC_COMPRESS)
+#if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS) || IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS)
static int zbufsize_lz4(size_t size)
{
return LZ4_compressBound(size);
}
#endif
-#ifdef CONFIG_PSTORE_842_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_842_COMPRESS)
static int zbufsize_842(size_t size)
{
return size;
@@ -195,31 +195,31 @@ static int zbufsize_842(size_t size)
static const struct pstore_zbackend *zbackend __ro_after_init;
static const struct pstore_zbackend zbackends[] = {
-#ifdef CONFIG_PSTORE_DEFLATE_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_DEFLATE_COMPRESS)
{
.zbufsize = zbufsize_deflate,
.name = "deflate",
},
#endif
-#ifdef CONFIG_PSTORE_LZO_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_LZO_COMPRESS)
{
.zbufsize = zbufsize_lzo,
.name = "lzo",
},
#endif
-#ifdef CONFIG_PSTORE_LZ4_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS)
{
.zbufsize = zbufsize_lz4,
.name = "lz4",
},
#endif
-#ifdef CONFIG_PSTORE_LZ4HC_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS)
{
.zbufsize = zbufsize_lz4,
.name = "lz4hc",
},
#endif
-#ifdef CONFIG_PSTORE_842_COMPRESS
+#if IS_ENABLED(CONFIG_PSTORE_842_COMPRESS)
{
.zbufsize = zbufsize_842,
.name = "842",
--
2.9.0
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