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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
149 lines
3.2 KiB
C
149 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <linux/zlib.h>
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#include "backend_deflate.h"
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/* Use the same value as crypto API */
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#define DEFLATE_DEF_WINBITS (-11)
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#define DEFLATE_DEF_MEMLEVEL MAX_MEM_LEVEL
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struct deflate_ctx {
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struct z_stream_s cctx;
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struct z_stream_s dctx;
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};
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static void deflate_release_params(struct zcomp_params *params)
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{
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}
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static int deflate_setup_params(struct zcomp_params *params)
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{
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if (params->level == ZCOMP_PARAM_NOT_SET)
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params->level = Z_DEFAULT_COMPRESSION;
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if (params->deflate.winbits == ZCOMP_PARAM_NOT_SET)
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params->deflate.winbits = DEFLATE_DEF_WINBITS;
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return 0;
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}
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static void deflate_destroy(struct zcomp_ctx *ctx)
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{
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struct deflate_ctx *zctx = ctx->context;
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if (!zctx)
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return;
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if (zctx->cctx.workspace) {
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zlib_deflateEnd(&zctx->cctx);
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vfree(zctx->cctx.workspace);
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}
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if (zctx->dctx.workspace) {
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zlib_inflateEnd(&zctx->dctx);
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vfree(zctx->dctx.workspace);
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}
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kfree(zctx);
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}
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static int deflate_create(struct zcomp_params *params, struct zcomp_ctx *ctx)
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{
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struct deflate_ctx *zctx;
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size_t sz;
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int ret;
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zctx = kzalloc_obj(*zctx);
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if (!zctx)
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return -ENOMEM;
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ctx->context = zctx;
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sz = zlib_deflate_workspacesize(params->deflate.winbits, MAX_MEM_LEVEL);
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zctx->cctx.workspace = vzalloc(sz);
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if (!zctx->cctx.workspace)
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goto error;
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ret = zlib_deflateInit2(&zctx->cctx, params->level, Z_DEFLATED,
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params->deflate.winbits, DEFLATE_DEF_MEMLEVEL,
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Z_DEFAULT_STRATEGY);
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if (ret != Z_OK)
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goto error;
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sz = zlib_inflate_workspacesize();
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zctx->dctx.workspace = vzalloc(sz);
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if (!zctx->dctx.workspace)
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goto error;
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ret = zlib_inflateInit2(&zctx->dctx, params->deflate.winbits);
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if (ret != Z_OK)
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goto error;
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return 0;
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error:
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deflate_destroy(ctx);
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return -EINVAL;
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}
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static int deflate_compress(struct zcomp_params *params, struct zcomp_ctx *ctx,
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struct zcomp_req *req)
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{
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struct deflate_ctx *zctx = ctx->context;
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struct z_stream_s *deflate;
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int ret;
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deflate = &zctx->cctx;
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ret = zlib_deflateReset(deflate);
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if (ret != Z_OK)
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return -EINVAL;
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deflate->next_in = (u8 *)req->src;
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deflate->avail_in = req->src_len;
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deflate->next_out = (u8 *)req->dst;
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deflate->avail_out = req->dst_len;
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ret = zlib_deflate(deflate, Z_FINISH);
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if (ret != Z_STREAM_END)
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return -EINVAL;
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req->dst_len = deflate->total_out;
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return 0;
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}
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static int deflate_decompress(struct zcomp_params *params,
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struct zcomp_ctx *ctx,
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struct zcomp_req *req)
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{
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struct deflate_ctx *zctx = ctx->context;
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struct z_stream_s *inflate;
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int ret;
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inflate = &zctx->dctx;
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ret = zlib_inflateReset(inflate);
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if (ret != Z_OK)
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return -EINVAL;
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inflate->next_in = (u8 *)req->src;
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inflate->avail_in = req->src_len;
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inflate->next_out = (u8 *)req->dst;
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inflate->avail_out = req->dst_len;
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ret = zlib_inflate(inflate, Z_SYNC_FLUSH);
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if (ret != Z_STREAM_END)
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return -EINVAL;
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return 0;
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}
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const struct zcomp_ops backend_deflate = {
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.compress = deflate_compress,
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.decompress = deflate_decompress,
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.create_ctx = deflate_create,
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.destroy_ctx = deflate_destroy,
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.setup_params = deflate_setup_params,
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.release_params = deflate_release_params,
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.name = "deflate",
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};
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