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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2016 Flavius Anton
* Copyright (c) 2016 Mihai Tiganus
* Copyright (c) 2016-2019 Mihai Carabas
* Copyright (c) 2017-2019 Darius Mihai
* Copyright (c) 2017-2019 Elena Mihailescu
* Copyright (c) 2018-2019 Sergiu Weisz
* All rights reserved.
* The bhyve-snapshot feature was developed under sponsorships
* from Matthew Grooms.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/systm.h>
#include <machine/vmm_snapshot.h>
void
vm_snapshot_buf_err(const char *bufname, const enum vm_snapshot_op op)
{
const char *opstr;
if (op == VM_SNAPSHOT_SAVE)
opstr = "save";
else if (op == VM_SNAPSHOT_RESTORE)
opstr = "restore";
else
opstr = "unknown";
printf("%s: snapshot-%s failed for %s\r\n", __func__, opstr, bufname);
}
int
vm_snapshot_buf(void *data, size_t data_size, struct vm_snapshot_meta *meta)
{
struct vm_snapshot_buffer *buffer;
int op;
buffer = &meta->buffer;
op = meta->op;
if (buffer->buf_rem < data_size) {
printf("%s: buffer too small\r\n", __func__);
return (E2BIG);
}
if (op == VM_SNAPSHOT_SAVE)
copyout(data, buffer->buf, data_size);
else if (op == VM_SNAPSHOT_RESTORE)
copyin(buffer->buf, data, data_size);
else
return (EINVAL);
buffer->buf += data_size;
buffer->buf_rem -= data_size;
return (0);
}
size_t
vm_get_snapshot_size(struct vm_snapshot_meta *meta)
{
size_t length;
struct vm_snapshot_buffer *buffer;
buffer = &meta->buffer;
if (buffer->buf_size < buffer->buf_rem) {
printf("%s: Invalid buffer: size = %zu, rem = %zu\r\n",
__func__, buffer->buf_size, buffer->buf_rem);
length = 0;
} else {
length = buffer->buf_size - buffer->buf_rem;
}
return (length);
}
int
vm_snapshot_buf_cmp(void *data, size_t data_size, struct vm_snapshot_meta *meta)
{
struct vm_snapshot_buffer *buffer;
int op;
int ret;
buffer = &meta->buffer;
op = meta->op;
if (buffer->buf_rem < data_size) {
printf("%s: buffer too small\r\n", __func__);
ret = E2BIG;
goto done;
}
if (op == VM_SNAPSHOT_SAVE) {
ret = 0;
copyout(data, buffer->buf, data_size);
} else if (op == VM_SNAPSHOT_RESTORE) {
ret = memcmp(data, buffer->buf, data_size);
} else {
ret = EINVAL;
goto done;
}
buffer->buf += data_size;
buffer->buf_rem -= data_size;
done:
return (ret);
}
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