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