reactos/drivers/filesystems/btrfs/calcthread.c

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/* Copyright (c) Mark Harmstone 2016-17
*
* This file is part of WinBtrfs.
*
* WinBtrfs is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public Licence as published by
* the Free Software Foundation, either version 3 of the Licence, or
* (at your option) any later version.
*
* WinBtrfs 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 Lesser General Public Licence for more details.
*
* You should have received a copy of the GNU Lesser General Public Licence
* along with WinBtrfs. If not, see <http://www.gnu.org/licenses/>. */
#include "btrfs_drv.h"
#include "xxhash.h"
#include "crc32c.h"
void calc_thread_main(device_extension* Vcb, calc_job* cj) {
while (true) {
KIRQL irql;
calc_job* cj2;
uint8_t* src;
void* dest;
bool last_one = false;
KeAcquireSpinLock(&Vcb->calcthreads.spinlock, &irql);
if (cj && cj->not_started == 0) {
KeReleaseSpinLock(&Vcb->calcthreads.spinlock, irql);
break;
}
if (cj)
cj2 = cj;
else {
if (IsListEmpty(&Vcb->calcthreads.job_list)) {
KeReleaseSpinLock(&Vcb->calcthreads.spinlock, irql);
break;
}
cj2 = CONTAINING_RECORD(Vcb->calcthreads.job_list.Flink, calc_job, list_entry);
}
src = cj2->in;
dest = cj2->out;
switch (cj2->type) {
case calc_thread_crc32c:
case calc_thread_xxhash:
case calc_thread_sha256:
case calc_thread_blake2:
cj2->in = (uint8_t*)cj2->in + Vcb->superblock.sector_size;
cj2->out = (uint8_t*)cj2->out + Vcb->csum_size;
break;
default:
break;
}
cj2->not_started--;
if (cj2->not_started == 0) {
RemoveEntryList(&cj2->list_entry);
last_one = true;
}
KeReleaseSpinLock(&Vcb->calcthreads.spinlock, irql);
switch (cj2->type) {
case calc_thread_crc32c:
*(uint32_t*)dest = ~calc_crc32c(0xffffffff, src, Vcb->superblock.sector_size);
break;
case calc_thread_xxhash:
*(uint64_t*)dest = XXH64(src, Vcb->superblock.sector_size, 0);
break;
case calc_thread_sha256:
calc_sha256(dest, src, Vcb->superblock.sector_size);
break;
case calc_thread_blake2:
blake2b(dest, BLAKE2_HASH_SIZE, src, Vcb->superblock.sector_size);
break;
case calc_thread_decomp_zlib:
cj2->Status = zlib_decompress(src, cj2->inlen, dest, cj2->outlen);
if (!NT_SUCCESS(cj2->Status))
ERR("zlib_decompress returned %08lx\n", cj2->Status);
break;
case calc_thread_decomp_lzo:
cj2->Status = lzo_decompress(src, cj2->inlen, dest, cj2->outlen, cj2->off);
if (!NT_SUCCESS(cj2->Status))
ERR("lzo_decompress returned %08lx\n", cj2->Status);
break;
case calc_thread_decomp_zstd:
cj2->Status = zstd_decompress(src, cj2->inlen, dest, cj2->outlen);
if (!NT_SUCCESS(cj2->Status))
ERR("zstd_decompress returned %08lx\n", cj2->Status);
break;
case calc_thread_comp_zlib:
cj2->Status = zlib_compress(src, cj2->inlen, dest, cj2->outlen, Vcb->options.zlib_level, &cj2->space_left);
if (!NT_SUCCESS(cj2->Status))
ERR("zlib_compress returned %08lx\n", cj2->Status);
break;
case calc_thread_comp_lzo:
cj2->Status = lzo_compress(src, cj2->inlen, dest, cj2->outlen, &cj2->space_left);
if (!NT_SUCCESS(cj2->Status))
ERR("lzo_compress returned %08lx\n", cj2->Status);
break;
case calc_thread_comp_zstd:
cj2->Status = zstd_compress(src, cj2->inlen, dest, cj2->outlen, Vcb->options.zstd_level, &cj2->space_left);
if (!NT_SUCCESS(cj2->Status))
ERR("zstd_compress returned %08lx\n", cj2->Status);
break;
}
if (InterlockedDecrement(&cj2->left) == 0)
KeSetEvent(&cj2->event, 0, false);
if (last_one)
break;
}
}
void do_calc_job(device_extension* Vcb, uint8_t* data, uint32_t sectors, void* csum) {
KIRQL irql;
calc_job cj;
cj.in = data;
cj.out = csum;
cj.left = cj.not_started = sectors;
switch (Vcb->superblock.csum_type) {
case CSUM_TYPE_CRC32C:
cj.type = calc_thread_crc32c;
break;
case CSUM_TYPE_XXHASH:
cj.type = calc_thread_xxhash;
break;
case CSUM_TYPE_SHA256:
cj.type = calc_thread_sha256;
break;
case CSUM_TYPE_BLAKE2:
cj.type = calc_thread_blake2;
break;
}
KeInitializeEvent(&cj.event, NotificationEvent, false);
KeAcquireSpinLock(&Vcb->calcthreads.spinlock, &irql);
InsertTailList(&Vcb->calcthreads.job_list, &cj.list_entry);
KeSetEvent(&Vcb->calcthreads.event, 0, false);
KeClearEvent(&Vcb->calcthreads.event);
KeReleaseSpinLock(&Vcb->calcthreads.spinlock, irql);
calc_thread_main(Vcb, &cj);
KeWaitForSingleObject(&cj.event, Executive, KernelMode, false, NULL);
}
NTSTATUS add_calc_job_decomp(device_extension* Vcb, uint8_t compression, void* in, unsigned int inlen,
void* out, unsigned int outlen, unsigned int off, calc_job** pcj) {
calc_job* cj;
KIRQL irql;
cj = ExAllocatePoolWithTag(NonPagedPool, sizeof(calc_job), ALLOC_TAG);
if (!cj) {
ERR("out of memory\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
cj->in = in;
cj->inlen = inlen;
cj->out = out;
cj->outlen = outlen;
cj->off = off;
cj->left = cj->not_started = 1;
cj->Status = STATUS_SUCCESS;
switch (compression) {
case BTRFS_COMPRESSION_ZLIB:
cj->type = calc_thread_decomp_zlib;
break;
case BTRFS_COMPRESSION_LZO:
cj->type = calc_thread_decomp_lzo;
break;
case BTRFS_COMPRESSION_ZSTD:
cj->type = calc_thread_decomp_zstd;
break;
default:
ERR("unexpected compression type %x\n", compression);
ExFreePool(cj);
return STATUS_NOT_SUPPORTED;
}
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KeInitializeEvent(&cj->event, NotificationEvent, false);
KeAcquireSpinLock(&Vcb->calcthreads.spinlock, &irql);
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InsertTailList(&Vcb->calcthreads.job_list, &cj->list_entry);
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KeSetEvent(&Vcb->calcthreads.event, 0, false);
KeClearEvent(&Vcb->calcthreads.event);
KeReleaseSpinLock(&Vcb->calcthreads.spinlock, irql);
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*pcj = cj;
return STATUS_SUCCESS;
}
NTSTATUS add_calc_job_comp(device_extension* Vcb, uint8_t compression, void* in, unsigned int inlen,
void* out, unsigned int outlen, calc_job** pcj) {
calc_job* cj;
KIRQL irql;
cj = ExAllocatePoolWithTag(NonPagedPool, sizeof(calc_job), ALLOC_TAG);
if (!cj) {
ERR("out of memory\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
cj->in = in;
cj->inlen = inlen;
cj->out = out;
cj->outlen = outlen;
cj->left = cj->not_started = 1;
cj->Status = STATUS_SUCCESS;
switch (compression) {
case BTRFS_COMPRESSION_ZLIB:
cj->type = calc_thread_comp_zlib;
break;
case BTRFS_COMPRESSION_LZO:
cj->type = calc_thread_comp_lzo;
break;
case BTRFS_COMPRESSION_ZSTD:
cj->type = calc_thread_comp_zstd;
break;
default:
ERR("unexpected compression type %x\n", compression);
ExFreePool(cj);
return STATUS_NOT_SUPPORTED;
}
KeInitializeEvent(&cj->event, NotificationEvent, false);
KeAcquireSpinLock(&Vcb->calcthreads.spinlock, &irql);
InsertTailList(&Vcb->calcthreads.job_list, &cj->list_entry);
KeSetEvent(&Vcb->calcthreads.event, 0, false);
KeClearEvent(&Vcb->calcthreads.event);
KeReleaseSpinLock(&Vcb->calcthreads.spinlock, irql);
*pcj = cj;
return STATUS_SUCCESS;
}
_Function_class_(KSTART_ROUTINE)
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void __stdcall calc_thread(void* context) {
drv_calc_thread* thread = context;
device_extension* Vcb = thread->DeviceObject->DeviceExtension;
ObReferenceObject(thread->DeviceObject);
KeSetSystemAffinityThread((KAFFINITY)(1 << thread->number));
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while (true) {
KeWaitForSingleObject(&Vcb->calcthreads.event, Executive, KernelMode, false, NULL);
calc_thread_main(Vcb, NULL);
if (thread->quit)
break;
}
ObDereferenceObject(thread->DeviceObject);
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KeSetEvent(&thread->finished, 0, false);
PsTerminateSystemThread(STATUS_SUCCESS);
}