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multifd: Make zstd compression method not use iovs

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Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Juan Quintela 2021-11-19 13:16:25 +01:00
parent 9c5c8ff24e
commit f5ff548774
1 changed files with 10 additions and 10 deletions
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20
migration/multifd-zstd.c
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@ -13,6 +13,7 @@
#include "qemu/osdep.h"
#include <zstd.h>
#include "qemu/rcu.h"
#include "exec/ramblock.h"
#include "exec/target_page.h"
#include "qapi/error.h"
#include "migration.h"
@ -111,8 +112,8 @@ static void zstd_send_cleanup(MultiFDSendParams *p, Error **errp)
*/
static int zstd_send_prepare(MultiFDSendParams *p, Error **errp)
{
struct iovec *iov = p->pages->iov;
struct zstd_data *z = p->data;
size_t page_size = qemu_target_page_size();
int ret;
uint32_t i;
@ -126,8 +127,8 @@ static int zstd_send_prepare(MultiFDSendParams *p, Error **errp)
if (i == p->pages->num - 1) {
flush = ZSTD_e_flush;
}
z->in.src = iov[i].iov_base;
z->in.size = iov[i].iov_len;
z->in.src = p->pages->block->host + p->pages->offset[i];
z->in.size = page_size;
z->in.pos = 0;
/*
@ -256,7 +257,8 @@ static int zstd_recv_pages(MultiFDRecvParams *p, Error **errp)
{
uint32_t in_size = p->next_packet_size;
uint32_t out_size = 0;
uint32_t expected_size = p->pages->num * qemu_target_page_size();
size_t page_size = qemu_target_page_size();
uint32_t expected_size = p->pages->num * page_size;
uint32_t flags = p->flags & MULTIFD_FLAG_COMPRESSION_MASK;
struct zstd_data *z = p->data;
int ret;
@ -278,10 +280,8 @@ static int zstd_recv_pages(MultiFDRecvParams *p, Error **errp)
z->in.pos = 0;
for (i = 0; i < p->pages->num; i++) {
struct iovec *iov = &p->pages->iov[i];
z->out.dst = iov->iov_base;
z->out.size = iov->iov_len;
z->out.dst = p->pages->block->host + p->pages->offset[i];
z->out.size = page_size;
z->out.pos = 0;
/*
@ -295,8 +295,8 @@ static int zstd_recv_pages(MultiFDRecvParams *p, Error **errp)
do {
ret = ZSTD_decompressStream(z->zds, &z->out, &z->in);
} while (ret > 0 && (z->in.size - z->in.pos > 0)
&& (z->out.pos < iov->iov_len));
if (ret > 0 && (z->out.pos < iov->iov_len)) {
&& (z->out.pos < page_size));
if (ret > 0 && (z->out.pos < page_size)) {
error_setg(errp, "multifd %d: decompressStream buffer too small",
p->id);
return -1;