mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-03-22 07:27:12 +08:00
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>
124 lines
2.5 KiB
C
124 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Squashfs - a compressed read only filesystem for Linux
|
|
*
|
|
* Copyright (c) 2010 LG Electronics
|
|
* Chan Jeong <chan.jeong@lge.com>
|
|
*
|
|
* lzo_wrapper.c
|
|
*/
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/bio.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/lzo.h>
|
|
|
|
#include "squashfs_fs.h"
|
|
#include "squashfs_fs_sb.h"
|
|
#include "squashfs.h"
|
|
#include "decompressor.h"
|
|
#include "page_actor.h"
|
|
|
|
struct squashfs_lzo {
|
|
void *input;
|
|
void *output;
|
|
};
|
|
|
|
static void *lzo_init(struct squashfs_sb_info *msblk, void *buff)
|
|
{
|
|
int block_size = max_t(int, msblk->block_size, SQUASHFS_METADATA_SIZE);
|
|
|
|
struct squashfs_lzo *stream = kzalloc_obj(*stream);
|
|
if (stream == NULL)
|
|
goto failed;
|
|
stream->input = vmalloc(block_size);
|
|
if (stream->input == NULL)
|
|
goto failed;
|
|
stream->output = vmalloc(block_size);
|
|
if (stream->output == NULL)
|
|
goto failed2;
|
|
|
|
return stream;
|
|
|
|
failed2:
|
|
vfree(stream->input);
|
|
failed:
|
|
ERROR("Failed to allocate lzo workspace\n");
|
|
kfree(stream);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
|
|
static void lzo_free(void *strm)
|
|
{
|
|
struct squashfs_lzo *stream = strm;
|
|
|
|
if (stream) {
|
|
vfree(stream->input);
|
|
vfree(stream->output);
|
|
}
|
|
kfree(stream);
|
|
}
|
|
|
|
|
|
static int lzo_uncompress(struct squashfs_sb_info *msblk, void *strm,
|
|
struct bio *bio, int offset, int length,
|
|
struct squashfs_page_actor *output)
|
|
{
|
|
struct bvec_iter_all iter_all = {};
|
|
struct bio_vec *bvec = bvec_init_iter_all(&iter_all);
|
|
struct squashfs_lzo *stream = strm;
|
|
void *buff = stream->input, *data;
|
|
int bytes = length, res;
|
|
size_t out_len = output->length;
|
|
|
|
while (bio_next_segment(bio, &iter_all)) {
|
|
int avail = min(bytes, ((int)bvec->bv_len) - offset);
|
|
|
|
data = bvec_virt(bvec);
|
|
memcpy(buff, data + offset, avail);
|
|
buff += avail;
|
|
bytes -= avail;
|
|
offset = 0;
|
|
}
|
|
|
|
res = lzo1x_decompress_safe(stream->input, (size_t)length,
|
|
stream->output, &out_len);
|
|
if (res != LZO_E_OK)
|
|
goto failed;
|
|
|
|
res = bytes = (int)out_len;
|
|
data = squashfs_first_page(output);
|
|
buff = stream->output;
|
|
while (data) {
|
|
if (bytes <= PAGE_SIZE) {
|
|
if (!IS_ERR(data))
|
|
memcpy(data, buff, bytes);
|
|
break;
|
|
} else {
|
|
if (!IS_ERR(data))
|
|
memcpy(data, buff, PAGE_SIZE);
|
|
buff += PAGE_SIZE;
|
|
bytes -= PAGE_SIZE;
|
|
data = squashfs_next_page(output);
|
|
}
|
|
}
|
|
squashfs_finish_page(output);
|
|
|
|
return res;
|
|
|
|
failed:
|
|
return -EIO;
|
|
}
|
|
|
|
const struct squashfs_decompressor squashfs_lzo_comp_ops = {
|
|
.init = lzo_init,
|
|
.free = lzo_free,
|
|
.decompress = lzo_uncompress,
|
|
.id = LZO_COMPRESSION,
|
|
.name = "lzo",
|
|
.alloc_buffer = 0,
|
|
.supported = 1
|
|
};
|