diff options
Diffstat (limited to 'fs/pstore')
| -rw-r--r-- | fs/pstore/Kconfig | 34 | ||||
| -rw-r--r-- | fs/pstore/platform.c | 415 | ||||
| -rw-r--r-- | fs/pstore/ram.c | 2 |
3 files changed, 84 insertions, 367 deletions
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index e4e22026c7a1..49b407eab846 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -12,51 +12,47 @@ config PSTORE If you don't have a platform persistent store driver, say N. -config PSTORE_ZLIB_COMPRESS - bool "ZLIB compression" +config PSTORE_DEFLATE_COMPRESS + bool "DEFLATE (ZLIB) compression" default y depends on PSTORE - select ZLIB_DEFLATE - select ZLIB_INFLATE + select CRYPTO_DEFLATE help - This option enables ZLIB compression algorithm support. + This option enables DEFLATE (also known as ZLIB) compression + algorithm support. config PSTORE_LZO_COMPRESS bool "LZO compression" depends on PSTORE - select LZO_COMPRESS - select LZO_DECOMPRESS + select CRYPTO_LZO help This option enables LZO compression algorithm support. config PSTORE_LZ4_COMPRESS bool "LZ4 compression" depends on PSTORE - select LZ4_COMPRESS - select LZ4_DECOMPRESS + select CRYPTO_LZ4 help This option enables LZ4 compression algorithm support. config PSTORE_LZ4HC_COMPRESS bool "LZ4HC compression" depends on PSTORE - select LZ4HC_COMPRESS - select LZ4_DECOMPRESS + select CRYPTO_LZ4HC help This option enables LZ4HC (high compression) mode algorithm. config PSTORE_842_COMPRESS bool "842 compression" depends on PSTORE - select 842_COMPRESS - select 842_DECOMPRESS + select CRYPTO_842 help This option enables 842 compression algorithm support. config PSTORE_COMPRESS def_bool y depends on PSTORE - depends on PSTORE_ZLIB_COMPRESS || PSTORE_LZO_COMPRESS || \ + depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \ PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \ PSTORE_842_COMPRESS @@ -69,12 +65,12 @@ choice the kernel command line. Currently, pstore has support for 5 compression algorithms: - zlib, lzo, lz4, lz4hc and 842. + deflate, lzo, lz4, lz4hc and 842. - The default compression algorithm is zlib. + The default compression algorithm is deflate. - config PSTORE_ZLIB_COMPRESS_DEFAULT - bool "zlib" if PSTORE_ZLIB_COMPRESS=y + config PSTORE_DEFLATE_COMPRESS_DEFAULT + bool "deflate" if PSTORE_DEFLATE_COMPRESS=y config PSTORE_LZO_COMPRESS_DEFAULT bool "lzo" if PSTORE_LZO_COMPRESS=y @@ -93,7 +89,7 @@ endchoice config PSTORE_COMPRESS_DEFAULT string depends on PSTORE_COMPRESS - default "zlib" if PSTORE_ZLIB_COMPRESS_DEFAULT + default "deflate" if PSTORE_DEFLATE_COMPRESS_DEFAULT default "lzo" if PSTORE_LZO_COMPRESS_DEFAULT default "lz4" if PSTORE_LZ4_COMPRESS_DEFAULT default "lz4hc" if PSTORE_LZ4HC_COMPRESS_DEFAULT diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 06e3b280c3a5..42e111b3bd0c 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -28,18 +28,13 @@ #include <linux/console.h> #include <linux/module.h> #include <linux/pstore.h> -#ifdef CONFIG_PSTORE_ZLIB_COMPRESS -#include <linux/zlib.h> -#endif #ifdef CONFIG_PSTORE_LZO_COMPRESS #include <linux/lzo.h> #endif #if defined(CONFIG_PSTORE_LZ4_COMPRESS) || defined(CONFIG_PSTORE_LZ4HC_COMPRESS) #include <linux/lz4.h> #endif -#ifdef CONFIG_PSTORE_842_COMPRESS -#include <linux/sw842.h> -#endif +#include <linux/crypto.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/slab.h> @@ -85,25 +80,10 @@ static char *compress = #endif /* Compression parameters */ -#ifdef CONFIG_PSTORE_ZLIB_COMPRESS -#define COMPR_LEVEL 6 -#define WINDOW_BITS 12 -#define MEM_LEVEL 4 -static struct z_stream_s stream; -#endif -#if defined(CONFIG_PSTORE_LZO_COMPRESS) || \ - defined(CONFIG_PSTORE_LZ4_COMPRESS) || \ - defined(CONFIG_PSTORE_LZ4HC_COMPRESS) || \ - defined(CONFIG_PSTORE_842_COMPRESS) -static unsigned char *workspace; -#endif +static struct crypto_comp *tfm; struct pstore_zbackend { - int (*compress)(const void *in, void *out, size_t inlen, size_t outlen); - int (*decompress)(void *in, void *out, size_t inlen, size_t outlen); - void (*allocate)(void); - void (*free)(void); - + int (*zbufsize)(size_t size); const char *name; }; @@ -162,77 +142,12 @@ bool pstore_cannot_block_path(enum kmsg_dump_reason reason) } EXPORT_SYMBOL_GPL(pstore_cannot_block_path); -#ifdef CONFIG_PSTORE_ZLIB_COMPRESS -/* Derived from logfs_compress() */ -static int compress_zlib(const void *in, void *out, size_t inlen, size_t outlen) -{ - int err, ret; - - ret = -EIO; - err = zlib_deflateInit2(&stream, COMPR_LEVEL, Z_DEFLATED, WINDOW_BITS, - MEM_LEVEL, Z_DEFAULT_STRATEGY); - if (err != Z_OK) - goto error; - - stream.next_in = in; - stream.avail_in = inlen; - stream.total_in = 0; - stream.next_out = out; - stream.avail_out = outlen; - stream.total_out = 0; - - err = zlib_deflate(&stream, Z_FINISH); - if (err != Z_STREAM_END) - goto error; - - err = zlib_deflateEnd(&stream); - if (err != Z_OK) - goto error; - - if (stream.total_out >= stream.total_in) - goto error; - - ret = stream.total_out; -error: - return ret; -} - -/* Derived from logfs_uncompress */ -static int decompress_zlib(void *in, void *out, size_t inlen, size_t outlen) -{ - int err, ret; - - ret = -EIO; - err = zlib_inflateInit2(&stream, WINDOW_BITS); - if (err != Z_OK) - goto error; - - stream.next_in = in; - stream.avail_in = inlen; - stream.total_in = 0; - stream.next_out = out; - stream.avail_out = outlen; - stream.total_out = 0; - - err = zlib_inflate(&stream, Z_FINISH); - if (err != Z_STREAM_END) - goto error; - - err = zlib_inflateEnd(&stream); - if (err != Z_OK) - goto error; - - ret = stream.total_out; -error: - return ret; -} - -static void allocate_zlib(void) +#ifdef CONFIG_PSTORE_DEFLATE_COMPRESS +static int zbufsize_deflate(size_t size) { - size_t size; size_t cmpr; - switch (psinfo->bufsize) { + switch (size) { /* buffer range for efivars */ case 1000 ... 2000: cmpr = 56; @@ -252,287 +167,61 @@ static void allocate_zlib(void) break; } - big_oops_buf_sz = (psinfo->bufsize * 100) / cmpr; - big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); - if (big_oops_buf) { - size = max(zlib_deflate_workspacesize(WINDOW_BITS, MEM_LEVEL), - zlib_inflate_workspacesize()); - stream.workspace = kmalloc(size, GFP_KERNEL); - if (!stream.workspace) { - pr_err("No memory for compression workspace; skipping compression\n"); - kfree(big_oops_buf); - big_oops_buf = NULL; - } - } else { - pr_err("No memory for uncompressed data; skipping compression\n"); - stream.workspace = NULL; - } - -} - -static void free_zlib(void) -{ - kfree(stream.workspace); - stream.workspace = NULL; - kfree(big_oops_buf); - big_oops_buf = NULL; - big_oops_buf_sz = 0; + return (size * 100) / cmpr; } #endif #ifdef CONFIG_PSTORE_LZO_COMPRESS -static int compress_lzo(const void *in, void *out, size_t inlen, size_t outlen) +static int zbufsize_lzo(size_t size) { - int ret; - - ret = lzo1x_1_compress(in, inlen, out, &outlen, workspace); - if (ret != LZO_E_OK) { - pr_err("lzo_compress error, ret = %d!\n", ret); - return -EIO; - } - - return outlen; -} - -static int decompress_lzo(void *in, void *out, size_t inlen, size_t outlen) -{ - int ret; - - ret = lzo1x_decompress_safe(in, inlen, out, &outlen); - if (ret != LZO_E_OK) { - pr_err("lzo_decompress error, ret = %d!\n", ret); - return -EIO; - } - - return outlen; -} - -static void allocate_lzo(void) -{ - big_oops_buf_sz = lzo1x_worst_compress(psinfo->bufsize); - big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); - if (big_oops_buf) { - workspace = kmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL); - if (!workspace) { - pr_err("No memory for compression workspace; skipping compression\n"); - kfree(big_oops_buf); - big_oops_buf = NULL; - } - } else { - pr_err("No memory for uncompressed data; skipping compression\n"); - workspace = NULL; - } -} - -static void free_lzo(void) -{ - kfree(workspace); - kfree(big_oops_buf); - big_oops_buf = NULL; - big_oops_buf_sz = 0; + return lzo1x_worst_compress(size); } #endif #if defined(CONFIG_PSTORE_LZ4_COMPRESS) || defined(CONFIG_PSTORE_LZ4HC_COMPRESS) -static int decompress_lz4(void *in, void *out, size_t inlen, size_t outlen) -{ - int ret; - - ret = LZ4_decompress_safe(in, out, inlen, outlen); - if (ret < 0) { - /* - * LZ4_decompress_safe will return an error code - * (< 0) if decompression failed - */ - pr_err("LZ4_decompress_safe error, ret = %d!\n", ret); - return -EIO; - } - - return ret; -} - -static void free_lz4(void) -{ - kfree(workspace); - kfree(big_oops_buf); - big_oops_buf = NULL; - big_oops_buf_sz = 0; -} -#endif - -#ifdef CONFIG_PSTORE_LZ4_COMPRESS -static int compress_lz4(const void *in, void *out, size_t inlen, size_t outlen) +static int zbufsize_lz4(size_t size) { - int ret; - - ret = LZ4_compress_default(in, out, inlen, outlen, workspace); - if (!ret) { - pr_err("LZ4_compress_default error; compression failed!\n"); - return -EIO; - } - - return ret; -} - -static void allocate_lz4(void) -{ - big_oops_buf_sz = LZ4_compressBound(psinfo->bufsize); - big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); - if (big_oops_buf) { - workspace = kmalloc(LZ4_MEM_COMPRESS, GFP_KERNEL); - if (!workspace) { - pr_err("No memory for compression workspace; skipping compression\n"); - kfree(big_oops_buf); - big_oops_buf = NULL; - } - } else { - pr_err("No memory for uncompressed data; skipping compression\n"); - workspace = NULL; - } -} -#endif - -#ifdef CONFIG_PSTORE_LZ4HC_COMPRESS -static int compress_lz4hc(const void *in, void *out, - size_t inlen, size_t outlen) -{ - int ret; - - ret = LZ4_compress_HC(in, out, inlen, outlen, - LZ4HC_DEFAULT_CLEVEL, workspace); - if (!ret) { - pr_err("LZ4_compress_HC error; compression failed!\n"); - return -EIO; - } - - return ret; -} - -static void allocate_lz4hc(void) -{ - big_oops_buf_sz = LZ4_compressBound(psinfo->bufsize); - big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); - if (big_oops_buf) { - workspace = kmalloc(LZ4HC_MEM_COMPRESS, GFP_KERNEL); - if (!workspace) { - pr_err("No memory for compression workspace; skipping compression\n"); - kfree(big_oops_buf); - big_oops_buf = NULL; - } - } else { - pr_err("No memory for uncompressed data; skipping compression\n"); - workspace = NULL; - } + return LZ4_compressBound(size); } #endif #ifdef CONFIG_PSTORE_842_COMPRESS -static int compress_842(const void *in, void *out, size_t inlen, size_t outlen) -{ - int ret; - unsigned int size; - - if (outlen > UINT_MAX) - return -EIO; - size = outlen; - - ret = sw842_compress(in, inlen, out, &size, workspace); - if (ret) { - pr_err("sw842_compress error; compression failed!\n"); - return ret; - } - - return size; -} - -static int decompress_842(void *in, void *out, size_t inlen, size_t outlen) +static int zbufsize_842(size_t size) { - int ret; - unsigned int size; - - if (outlen > UINT_MAX) - return -EIO; - size = outlen; - - ret = sw842_decompress(in, inlen, out, &size); - if (ret) { - pr_err("sw842_decompress error, ret = %d!\n", ret); - return ret; - } - return size; } - -static void allocate_842(void) -{ - big_oops_buf_sz = psinfo->bufsize; - big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); - if (big_oops_buf) { - workspace = kmalloc(SW842_MEM_COMPRESS, GFP_KERNEL); - if (!workspace) { - kfree(big_oops_buf); - big_oops_buf = NULL; - } - } else { - pr_err("No memory for uncompressed data; skipping compression\n"); - workspace = NULL; - } -} - -static void free_842(void) -{ - kfree(workspace); - kfree(big_oops_buf); - big_oops_buf = NULL; - big_oops_buf_sz = 0; -} #endif static const struct pstore_zbackend *zbackend __ro_after_init; static const struct pstore_zbackend zbackends[] = { -#ifdef CONFIG_PSTORE_ZLIB_COMPRESS +#ifdef CONFIG_PSTORE_DEFLATE_COMPRESS { - .compress = compress_zlib, - .decompress = decompress_zlib, - .allocate = allocate_zlib, - .free = free_zlib, - .name = "zlib", + .zbufsize = zbufsize_deflate, + .name = "deflate", }, #endif #ifdef CONFIG_PSTORE_LZO_COMPRESS { - .compress = compress_lzo, - .decompress = decompress_lzo, - .allocate = allocate_lzo, - .free = free_lzo, + .zbufsize = zbufsize_lzo, .name = "lzo", }, #endif #ifdef CONFIG_PSTORE_LZ4_COMPRESS { - .compress = compress_lz4, - .decompress = decompress_lz4, - .allocate = allocate_lz4, - .free = free_lz4, + .zbufsize = zbufsize_lz4, .name = "lz4", }, #endif #ifdef CONFIG_PSTORE_LZ4HC_COMPRESS { - .compress = compress_lz4hc, - .decompress = decompress_lz4, - .allocate = allocate_lz4hc, - .free = free_lz4, + .zbufsize = zbufsize_lz4, .name = "lz4hc", }, #endif #ifdef CONFIG_PSTORE_842_COMPRESS { - .compress = compress_842, - .decompress = decompress_842, - .allocate = allocate_842, - .free = free_842, + .zbufsize = zbufsize_842, .name = "842", }, #endif @@ -540,37 +229,69 @@ static const struct pstore_zbackend zbackends[] = { }; static int pstore_compress(const void *in, void *out, - size_t inlen, size_t outlen) + unsigned int inlen, unsigned int outlen) { - if (zbackend) - return zbackend->compress(in, out, inlen, outlen); - else - return -EIO; + int ret; + + ret = crypto_comp_compress(tfm, in, inlen, out, &outlen); + if (ret) { + pr_err("crypto_comp_compress failed, ret = %d!\n", ret); + return ret; + } + + return outlen; } -static int pstore_decompress(void *in, void *out, size_t inlen, size_t outlen) +static int pstore_decompress(void *in, void *out, + unsigned int inlen, unsigned int outlen) { - if (zbackend) - return zbackend->decompress(in, out, inlen, outlen); - else - return -EIO; + int ret; + + ret = crypto_comp_decompress(tfm, in, inlen, out, &outlen); + if (ret) { + pr_err("crypto_comp_decompress failed, ret = %d!\n", ret); + return ret; + } + + return outlen; } static void allocate_buf_for_compression(void) { - if (zbackend) { - zbackend->allocate(); - } else { + if (!zbackend) + return; + + if (!crypto_has_comp(zbackend->name, 0, 0)) { + pr_err("No %s compression\n", zbackend->name); + return; + } + + big_oops_buf_sz = zbackend->zbufsize(psinfo->bufsize); + if (big_oops_buf_sz <= 0) + return; + + big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL); + if (!big_oops_buf) { pr_err("allocate compression buffer error!\n"); + return; + } + + tfm = crypto_alloc_comp(zbackend->name, 0, 0); + if (IS_ERR_OR_NULL(tfm)) { + kfree(big_oops_buf); + big_oops_buf = NULL; + pr_err("crypto_alloc_comp() failed!\n"); + return; } } static void free_buf_for_compression(void) { - if (zbackend) - zbackend->free(); - else - pr_err("free compression buffer error!\n"); + if (!IS_ERR_OR_NULL(tfm)) + crypto_free_comp(tfm); + kfree(big_oops_buf); + big_oops_buf = NULL; + big_oops_buf_sz = 0; } /* diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 7125b398d312..49b2bc114868 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -938,7 +938,7 @@ static int __init ramoops_init(void) ramoops_register_dummy(); return platform_driver_register(&ramoops_driver); } -postcore_initcall(ramoops_init); +late_initcall(ramoops_init); static void __exit ramoops_exit(void) { |