#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>
#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;
};
}
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;
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
};
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;
}
/*
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