Commit 11049218 authored by Joonsoo Kim's avatar Joonsoo Kim Committed by Herbert Xu

crypto: compress - remove unused pcomp interface

It is unused now, so remove it.
Signed-off-by: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 10cff58c
......@@ -84,15 +84,6 @@ config CRYPTO_RNG_DEFAULT
tristate
select CRYPTO_DRBG_MENU
config CRYPTO_PCOMP
tristate
select CRYPTO_PCOMP2
select CRYPTO_ALGAPI
config CRYPTO_PCOMP2
tristate
select CRYPTO_ALGAPI2
config CRYPTO_AKCIPHER2
tristate
select CRYPTO_ALGAPI2
......@@ -122,7 +113,6 @@ config CRYPTO_MANAGER2
select CRYPTO_AEAD2
select CRYPTO_HASH2
select CRYPTO_BLKCIPHER2
select CRYPTO_PCOMP2
select CRYPTO_AKCIPHER2
config CRYPTO_USER
......@@ -1504,15 +1494,6 @@ config CRYPTO_DEFLATE
You will most probably want this if using IPSec.
config CRYPTO_ZLIB
tristate "Zlib compression algorithm"
select CRYPTO_PCOMP
select ZLIB_INFLATE
select ZLIB_DEFLATE
select NLATTR
help
This is the zlib algorithm.
config CRYPTO_LZO
tristate "LZO compression algorithm"
select CRYPTO_ALGAPI
......
......@@ -28,7 +28,6 @@ crypto_hash-y += ahash.o
crypto_hash-y += shash.o
obj-$(CONFIG_CRYPTO_HASH2) += crypto_hash.o
obj-$(CONFIG_CRYPTO_PCOMP2) += pcompress.o
obj-$(CONFIG_CRYPTO_AKCIPHER2) += akcipher.o
$(obj)/rsapubkey-asn1.o: $(obj)/rsapubkey-asn1.c $(obj)/rsapubkey-asn1.h
......@@ -99,7 +98,6 @@ obj-$(CONFIG_CRYPTO_SALSA20) += salsa20_generic.o
obj-$(CONFIG_CRYPTO_CHACHA20) += chacha20_generic.o
obj-$(CONFIG_CRYPTO_POLY1305) += poly1305_generic.o
obj-$(CONFIG_CRYPTO_DEFLATE) += deflate.o
obj-$(CONFIG_CRYPTO_ZLIB) += zlib.o
obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o
obj-$(CONFIG_CRYPTO_CRC32C) += crc32c_generic.o
obj-$(CONFIG_CRYPTO_CRC32) += crc32.o
......
/*
* Cryptographic API.
*
* Partial (de)compression operations.
*
* Copyright 2008 Sony Corporation
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/crypto.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/string.h>
#include <linux/cryptouser.h>
#include <net/netlink.h>
#include <crypto/compress.h>
#include <crypto/internal/compress.h>
#include "internal.h"
static int crypto_pcomp_init(struct crypto_tfm *tfm, u32 type, u32 mask)
{
return 0;
}
static int crypto_pcomp_init_tfm(struct crypto_tfm *tfm)
{
return 0;
}
#ifdef CONFIG_NET
static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
struct crypto_report_comp rpcomp;
strncpy(rpcomp.type, "pcomp", sizeof(rpcomp.type));
if (nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS,
sizeof(struct crypto_report_comp), &rpcomp))
goto nla_put_failure;
return 0;
nla_put_failure:
return -EMSGSIZE;
}
#else
static int crypto_pcomp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
return -ENOSYS;
}
#endif
static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
__attribute__ ((unused));
static void crypto_pcomp_show(struct seq_file *m, struct crypto_alg *alg)
{
seq_printf(m, "type : pcomp\n");
}
static const struct crypto_type crypto_pcomp_type = {
.extsize = crypto_alg_extsize,
.init = crypto_pcomp_init,
.init_tfm = crypto_pcomp_init_tfm,
#ifdef CONFIG_PROC_FS
.show = crypto_pcomp_show,
#endif
.report = crypto_pcomp_report,
.maskclear = ~CRYPTO_ALG_TYPE_MASK,
.maskset = CRYPTO_ALG_TYPE_MASK,
.type = CRYPTO_ALG_TYPE_PCOMPRESS,
.tfmsize = offsetof(struct crypto_pcomp, base),
};
struct crypto_pcomp *crypto_alloc_pcomp(const char *alg_name, u32 type,
u32 mask)
{
return crypto_alloc_tfm(alg_name, &crypto_pcomp_type, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_alloc_pcomp);
int crypto_register_pcomp(struct pcomp_alg *alg)
{
struct crypto_alg *base = &alg->base;
base->cra_type = &crypto_pcomp_type;
base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
base->cra_flags |= CRYPTO_ALG_TYPE_PCOMPRESS;
return crypto_register_alg(base);
}
EXPORT_SYMBOL_GPL(crypto_register_pcomp);
int crypto_unregister_pcomp(struct pcomp_alg *alg)
{
return crypto_unregister_alg(&alg->base);
}
EXPORT_SYMBOL_GPL(crypto_unregister_pcomp);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Partial (de)compression type");
MODULE_AUTHOR("Sony Corporation");
......@@ -96,13 +96,6 @@ struct comp_test_suite {
} comp, decomp;
};
struct pcomp_test_suite {
struct {
struct pcomp_testvec *vecs;
unsigned int count;
} comp, decomp;
};
struct hash_test_suite {
struct hash_testvec *vecs;
unsigned int count;
......@@ -133,7 +126,6 @@ struct alg_test_desc {
struct aead_test_suite aead;
struct cipher_test_suite cipher;
struct comp_test_suite comp;
struct pcomp_test_suite pcomp;
struct hash_test_suite hash;
struct cprng_test_suite cprng;
struct drbg_test_suite drbg;
......@@ -1293,183 +1285,6 @@ static int test_comp(struct crypto_comp *tfm, struct comp_testvec *ctemplate,
return ret;
}
static int test_pcomp(struct crypto_pcomp *tfm,
struct pcomp_testvec *ctemplate,
struct pcomp_testvec *dtemplate, int ctcount,
int dtcount)
{
const char *algo = crypto_tfm_alg_driver_name(crypto_pcomp_tfm(tfm));
unsigned int i;
char result[COMP_BUF_SIZE];
int res;
for (i = 0; i < ctcount; i++) {
struct comp_request req;
unsigned int produced = 0;
res = crypto_compress_setup(tfm, ctemplate[i].params,
ctemplate[i].paramsize);
if (res) {
pr_err("alg: pcomp: compression setup failed on test "
"%d for %s: error=%d\n", i + 1, algo, res);
return res;
}
res = crypto_compress_init(tfm);
if (res) {
pr_err("alg: pcomp: compression init failed on test "
"%d for %s: error=%d\n", i + 1, algo, res);
return res;
}
memset(result, 0, sizeof(result));
req.next_in = ctemplate[i].input;
req.avail_in = ctemplate[i].inlen / 2;
req.next_out = result;
req.avail_out = ctemplate[i].outlen / 2;
res = crypto_compress_update(tfm, &req);
if (res < 0 && (res != -EAGAIN || req.avail_in)) {
pr_err("alg: pcomp: compression update failed on test "
"%d for %s: error=%d\n", i + 1, algo, res);
return res;
}
if (res > 0)
produced += res;
/* Add remaining input data */
req.avail_in += (ctemplate[i].inlen + 1) / 2;
res = crypto_compress_update(tfm, &req);
if (res < 0 && (res != -EAGAIN || req.avail_in)) {
pr_err("alg: pcomp: compression update failed on test "
"%d for %s: error=%d\n", i + 1, algo, res);
return res;
}
if (res > 0)
produced += res;
/* Provide remaining output space */
req.avail_out += COMP_BUF_SIZE - ctemplate[i].outlen / 2;
res = crypto_compress_final(tfm, &req);
if (res < 0) {
pr_err("alg: pcomp: compression final failed on test "
"%d for %s: error=%d\n", i + 1, algo, res);
return res;
}
produced += res;
if (COMP_BUF_SIZE - req.avail_out != ctemplate[i].outlen) {
pr_err("alg: comp: Compression test %d failed for %s: "
"output len = %d (expected %d)\n", i + 1, algo,
COMP_BUF_SIZE - req.avail_out,
ctemplate[i].outlen);
return -EINVAL;
}
if (produced != ctemplate[i].outlen) {
pr_err("alg: comp: Compression test %d failed for %s: "
"returned len = %u (expected %d)\n", i + 1,
algo, produced, ctemplate[i].outlen);
return -EINVAL;
}
if (memcmp(result, ctemplate[i].output, ctemplate[i].outlen)) {
pr_err("alg: pcomp: Compression test %d failed for "
"%s\n", i + 1, algo);
hexdump(result, ctemplate[i].outlen);
return -EINVAL;
}
}
for (i = 0; i < dtcount; i++) {
struct comp_request req;
unsigned int produced = 0;
res = crypto_decompress_setup(tfm, dtemplate[i].params,
dtemplate[i].paramsize);
if (res) {
pr_err("alg: pcomp: decompression setup failed on "
"test %d for %s: error=%d\n", i + 1, algo, res);
return res;
}
res = crypto_decompress_init(tfm);
if (res) {
pr_err("alg: pcomp: decompression init failed on test "
"%d for %s: error=%d\n", i + 1, algo, res);
return res;
}
memset(result, 0, sizeof(result));
req.next_in = dtemplate[i].input;
req.avail_in = dtemplate[i].inlen / 2;
req.next_out = result;
req.avail_out = dtemplate[i].outlen / 2;
res = crypto_decompress_update(tfm, &req);
if (res < 0 && (res != -EAGAIN || req.avail_in)) {
pr_err("alg: pcomp: decompression update failed on "
"test %d for %s: error=%d\n", i + 1, algo, res);
return res;
}
if (res > 0)
produced += res;
/* Add remaining input data */
req.avail_in += (dtemplate[i].inlen + 1) / 2;
res = crypto_decompress_update(tfm, &req);
if (res < 0 && (res != -EAGAIN || req.avail_in)) {
pr_err("alg: pcomp: decompression update failed on "
"test %d for %s: error=%d\n", i + 1, algo, res);
return res;
}
if (res > 0)
produced += res;
/* Provide remaining output space */
req.avail_out += COMP_BUF_SIZE - dtemplate[i].outlen / 2;
res = crypto_decompress_final(tfm, &req);
if (res < 0 && (res != -EAGAIN || req.avail_in)) {
pr_err("alg: pcomp: decompression final failed on "
"test %d for %s: error=%d\n", i + 1, algo, res);
return res;
}
if (res > 0)
produced += res;
if (COMP_BUF_SIZE - req.avail_out != dtemplate[i].outlen) {
pr_err("alg: comp: Decompression test %d failed for "
"%s: output len = %d (expected %d)\n", i + 1,
algo, COMP_BUF_SIZE - req.avail_out,
dtemplate[i].outlen);
return -EINVAL;
}
if (produced != dtemplate[i].outlen) {
pr_err("alg: comp: Decompression test %d failed for "
"%s: returned len = %u (expected %d)\n", i + 1,
algo, produced, dtemplate[i].outlen);
return -EINVAL;
}
if (memcmp(result, dtemplate[i].output, dtemplate[i].outlen)) {
pr_err("alg: pcomp: Decompression test %d failed for "
"%s\n", i + 1, algo);
hexdump(result, dtemplate[i].outlen);
return -EINVAL;
}
}
return 0;
}
static int test_cprng(struct crypto_rng *tfm, struct cprng_testvec *template,
unsigned int tcount)
{
......@@ -1640,28 +1455,6 @@ static int alg_test_comp(const struct alg_test_desc *desc, const char *driver,
return err;
}
static int alg_test_pcomp(const struct alg_test_desc *desc, const char *driver,
u32 type, u32 mask)
{
struct crypto_pcomp *tfm;
int err;
tfm = crypto_alloc_pcomp(driver, type, mask);
if (IS_ERR(tfm)) {
pr_err("alg: pcomp: Failed to load transform for %s: %ld\n",
driver, PTR_ERR(tfm));
return PTR_ERR(tfm);
}
err = test_pcomp(tfm, desc->suite.pcomp.comp.vecs,
desc->suite.pcomp.decomp.vecs,
desc->suite.pcomp.comp.count,
desc->suite.pcomp.decomp.count);
crypto_free_pcomp(tfm);
return err;
}
static int alg_test_hash(const struct alg_test_desc *desc, const char *driver,
u32 type, u32 mask)
{
......@@ -3839,22 +3632,6 @@ static const struct alg_test_desc alg_test_descs[] = {
}
}
}
}, {
.alg = "zlib",
.test = alg_test_pcomp,
.fips_allowed = 1,
.suite = {
.pcomp = {
.comp = {
.vecs = zlib_comp_tv_template,
.count = ZLIB_COMP_TEST_VECTORS
},
.decomp = {
.vecs = zlib_decomp_tv_template,
.count = ZLIB_DECOMP_TEST_VECTORS
}
}
}
}
};
......
......@@ -25,9 +25,6 @@
#define _CRYPTO_TESTMGR_H
#include <linux/netlink.h>
#include <linux/zlib.h>
#include <crypto/compress.h>
#define MAX_DIGEST_SIZE 64
#define MAX_TAP 8
......@@ -32268,14 +32265,6 @@ struct comp_testvec {
char output[COMP_BUF_SIZE];
};
struct pcomp_testvec {
const void *params;
unsigned int paramsize;
int inlen, outlen;
char input[COMP_BUF_SIZE];
char output[COMP_BUF_SIZE];
};
/*
* Deflate test vectors (null-terminated strings).
* Params: winbits=-11, Z_DEFAULT_COMPRESSION, MAX_MEM_LEVEL.
......@@ -32356,139 +32345,6 @@ static struct comp_testvec deflate_decomp_tv_template[] = {
},
};
#define ZLIB_COMP_TEST_VECTORS 2
#define ZLIB_DECOMP_TEST_VECTORS 2
static const struct {
struct nlattr nla;
int val;
} deflate_comp_params[] = {
{
.nla = {
.nla_len = NLA_HDRLEN + sizeof(int),
.nla_type = ZLIB_COMP_LEVEL,
},
.val = Z_DEFAULT_COMPRESSION,
}, {
.nla = {
.nla_len = NLA_HDRLEN + sizeof(int),
.nla_type = ZLIB_COMP_METHOD,
},
.val = Z_DEFLATED,
}, {
.nla = {
.nla_len = NLA_HDRLEN + sizeof(int),
.nla_type = ZLIB_COMP_WINDOWBITS,
},
.val = -11,
}, {
.nla = {
.nla_len = NLA_HDRLEN + sizeof(int),
.nla_type = ZLIB_COMP_MEMLEVEL,
},
.val = MAX_MEM_LEVEL,
}, {
.nla = {
.nla_len = NLA_HDRLEN + sizeof(int),
.nla_type = ZLIB_COMP_STRATEGY,
},
.val = Z_DEFAULT_STRATEGY,
}
};
static const struct {
struct nlattr nla;
int val;
} deflate_decomp_params[] = {
{
.nla = {
.nla_len = NLA_HDRLEN + sizeof(int),
.nla_type = ZLIB_DECOMP_WINDOWBITS,
},
.val = -11,
}
};
static struct pcomp_testvec zlib_comp_tv_template[] = {
{
.params = &deflate_comp_params,
.paramsize = sizeof(deflate_comp_params),
.inlen = 70,
.outlen = 38,
.input = "Join us now and share the software "
"Join us now and share the software ",
.output = "\xf3\xca\xcf\xcc\x53\x28\x2d\x56"
"\xc8\xcb\x2f\x57\x48\xcc\x4b\x51"
"\x28\xce\x48\x2c\x4a\x55\x28\xc9"
"\x48\x55\x28\xce\x4f\x2b\x29\x07"
"\x71\xbc\x08\x2b\x01\x00",
}, {
.params = &deflate_comp_params,
.paramsize = sizeof(deflate_comp_params),
.inlen = 191,
.outlen = 122,
.input = "This document describes a compression method based on the DEFLATE"
"compression algorithm. This document defines the application of "
"the DEFLATE algorithm to the IP Payload Compression Protocol.",
.output = "\x5d\x8d\x31\x0e\xc2\x30\x10\x04"
"\xbf\xb2\x2f\xc8\x1f\x10\x04\x09"
"\x89\xc2\x85\x3f\x70\xb1\x2f\xf8"
"\x24\xdb\x67\xd9\x47\xc1\xef\x49"
"\x68\x12\x51\xae\x76\x67\xd6\x27"
"\x19\x88\x1a\xde\x85\xab\x21\xf2"
"\x08\x5d\x16\x1e\x20\x04\x2d\xad"
"\xf3\x18\xa2\x15\x85\x2d\x69\xc4"
"\x42\x83\x23\xb6\x6c\x89\x71\x9b"
"\xef\xcf\x8b\x9f\xcf\x33\xca\x2f"
"\xed\x62\xa9\x4c\x80\xff\x13\xaf"
"\x52\x37\xed\x0e\x52\x6b\x59\x02"
"\xd9\x4e\xe8\x7a\x76\x1d\x02\x98"
"\xfe\x8a\x87\x83\xa3\x4f\x56\x8a"
"\xb8\x9e\x8e\x5c\x57\xd3\xa0\x79"
"\xfa\x02",
},
};
static struct pcomp_testvec zlib_decomp_tv_template[] = {
{
.params = &deflate_decomp_params,
.paramsize = sizeof(deflate_decomp_params),
.inlen = 122,
.outlen = 191,
.input = "\x5d\x8d\x31\x0e\xc2\x30\x10\x04"
"\xbf\xb2\x2f\xc8\x1f\x10\x04\x09"
"\x89\xc2\x85\x3f\x70\xb1\x2f\xf8"
"\x24\xdb\x67\xd9\x47\xc1\xef\x49"
"\x68\x12\x51\xae\x76\x67\xd6\x27"
"\x19\x88\x1a\xde\x85\xab\x21\xf2"
"\x08\x5d\x16\x1e\x20\x04\x2d\xad"
"\xf3\x18\xa2\x15\x85\x2d\x69\xc4"
"\x42\x83\x23\xb6\x6c\x89\x71\x9b"
"\xef\xcf\x8b\x9f\xcf\x33\xca\x2f"
"\xed\x62\xa9\x4c\x80\xff\x13\xaf"
"\x52\x37\xed\x0e\x52\x6b\x59\x02"
"\xd9\x4e\xe8\x7a\x76\x1d\x02\x98"
"\xfe\x8a\x87\x83\xa3\x4f\x56\x8a"
"\xb8\x9e\x8e\x5c\x57\xd3\xa0\x79"
"\xfa\x02",
.output = "This document describes a compression method based on the DEFLATE"
"compression algorithm. This document defines the application of "
"the DEFLATE algorithm to the IP Payload Compression Protocol.",
}, {
.params = &deflate_decomp_params,
.paramsize = sizeof(deflate_decomp_params),
.inlen = 38,
.outlen = 70,
.input = "\xf3\xca\xcf\xcc\x53\x28\x2d\x56"
"\xc8\xcb\x2f\x57\x48\xcc\x4b\x51"
"\x28\xce\x48\x2c\x4a\x55\x28\xc9"
"\x48\x55\x28\xce\x4f\x2b\x29\x07"
"\x71\xbc\x08\x2b\x01\x00",
.output = "Join us now and share the software "
"Join us now and share the software ",
},
};
/*
* LZO test vectors (null-terminated strings).
*/
/*
* Cryptographic API.
*
* Zlib algorithm
*
* Copyright 2008 Sony Corporation
*
* Based on deflate.c, which is
* Copyright (c) 2003 James Morris <jmorris@intercode.com.au>
*
* 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; either version 2 of the License, or (at your option)
* any later version.
*
* FIXME: deflate transforms will require up to a total of about 436k of kernel
* memory on i386 (390k for compression, the rest for decompression), as the
* current zlib kernel code uses a worst case pre-allocation system by default.
* This needs to be fixed so that the amount of memory required is properly
* related to the winbits and memlevel parameters.
*/
#define pr_fmt(fmt) "%s: " fmt, __func__
#include <linux/init.h>
#include <linux/module.h>
#include <linux/zlib.h>
#include <linux/vmalloc.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/net.h>
#include <crypto/internal/compress.h>
#include <net/netlink.h>
struct zlib_ctx {
struct z_stream_s comp_stream;
struct z_stream_s decomp_stream;
int decomp_windowBits;
};
static void zlib_comp_exit(struct zlib_ctx *ctx)
{
struct z_stream_s *stream = &ctx->comp_stream;
if (stream->workspace) {
zlib_deflateEnd(stream);
vfree(stream->workspace);
stream->workspace = NULL;
}
}
static void zlib_decomp_exit(struct zlib_ctx *ctx)
{
struct z_stream_s *stream = &ctx->decomp_stream;
if (stream->workspace) {
zlib_inflateEnd(stream);
vfree(stream->workspace);
stream->workspace = NULL;
}
}
static int zlib_init(struct crypto_tfm *tfm)
{
return 0;
}
static void zlib_exit(struct crypto_tfm *tfm)
{
struct zlib_ctx *ctx = crypto_tfm_ctx(tfm);
zlib_comp_exit(ctx);
zlib_decomp_exit(ctx);
}
static int zlib_compress_setup(struct crypto_pcomp *tfm, const void *params,
unsigned int len)
{
struct zlib_ctx *ctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm));
struct z_stream_s *stream = &ctx->comp_stream;
struct nlattr *tb[ZLIB_COMP_MAX + 1];
int window_bits, mem_level;
size_t workspacesize;
int ret;
ret = nla_parse(tb, ZLIB_COMP_MAX, params, len, NULL);
if (ret)
return ret;
zlib_comp_exit(ctx);
window_bits = tb[ZLIB_COMP_WINDOWBITS]
? nla_get_u32(tb[ZLIB_COMP_WINDOWBITS])
: MAX_WBITS;
mem_level = tb[ZLIB_COMP_MEMLEVEL]
? nla_get_u32(tb[ZLIB_COMP_MEMLEVEL])
: DEF_MEM_LEVEL;
workspacesize = zlib_deflate_workspacesize(window_bits, mem_level);
stream->workspace = vzalloc(workspacesize);
if (!stream->workspace)
return -ENOMEM;
ret = zlib_deflateInit2(stream,
tb[ZLIB_COMP_LEVEL]
? nla_get_u32(tb[ZLIB_COMP_LEVEL])
: Z_DEFAULT_COMPRESSION,
tb[ZLIB_COMP_METHOD]
? nla_get_u32(tb[ZLIB_COMP_METHOD])
: Z_DEFLATED,
window_bits,
mem_level,
tb[ZLIB_COMP_STRATEGY]
? nla_get_u32(tb[ZLIB_COMP_STRATEGY])
: Z_DEFAULT_STRATEGY);
if (ret != Z_OK) {
vfree(stream->workspace);
stream->workspace = NULL;
return -EINVAL;
}
return 0;
}
static int zlib_compress_init(struct crypto_pcomp *tfm)
{
int ret;
struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm));
struct z_stream_s *stream = &dctx->comp_stream;
ret = zlib_deflateReset(stream);
if (ret != Z_OK)
return -EINVAL;
return 0;
}
static int zlib_compress_update(struct crypto_pcomp *tfm,
struct comp_request *req)
{
int ret;
struct zlib_ctx *dctx = crypto_tfm_ctx(crypto_pcomp_tfm(tfm));
struct z_stream_s *stream = &dctx->comp_stream;
pr_debug("avail_in %u, avail_out %u\n", req->avail_in, req->avail_out);
stream->next_in = req->next_in;
stream->avail_in = req->avail_in;
stream->next_out = req->next_out;
stream->avail_out = req->avail_out;
ret = zlib_deflate(stream, Z_NO_FLUSH);
switch (ret) {
case Z_OK:
break;
case Z_BUF_ERROR:
pr_debug("zlib_deflate could not make progress\n");
return -EAGAIN;