Commit 575a58d7 authored by Jan Kiszka's avatar Jan Kiszka Committed by Anthony Liguori

block migration: Avoid large stack buffer

Move a potentially large buffer from stack to heap.
Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent c6d22830
......@@ -321,10 +321,12 @@ static int blk_mig_save_bulked_block(QEMUFile *f, int is_async)
static void blk_mig_save_dirty_blocks(QEMUFile *f)
{
BlkMigDevState *bmds;
uint8_t buf[BLOCK_SIZE];
uint8_t *buf;
int64_t sector;
int len;
buf = qemu_malloc(BLOCK_SIZE);
for (bmds = block_mig_state->bmds_first; bmds != NULL; bmds = bmds->next) {
for (sector = 0; sector < bmds->cur_sector;) {
if (bdrv_get_dirty(bmds->bs, sector)) {
......@@ -350,6 +352,8 @@ static void blk_mig_save_dirty_blocks(QEMUFile *f)
sector += BDRV_SECTORS_PER_DIRTY_CHUNK;
}
}
qemu_free(buf);
}
static void flush_blks(QEMUFile* f)
......@@ -458,8 +462,6 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
BlockDriverState *bs;
uint8_t *buf;
buf = qemu_malloc(BLOCK_SIZE);
do {
addr = qemu_get_be64(f);
......@@ -475,6 +477,8 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
bs = bdrv_find(device_name);
buf = qemu_malloc(BLOCK_SIZE);
qemu_get_buffer(f, buf, BLOCK_SIZE);
if (bs != NULL) {
bdrv_write(bs, addr, buf, BDRV_SECTORS_PER_DIRTY_CHUNK);
......@@ -482,14 +486,14 @@ static int block_load(QEMUFile *f, void *opaque, int version_id)
printf("Error unknown block device %s\n", device_name);
/* FIXME: add error handling */
}
qemu_free(buf);
} else if (!(flags & BLK_MIG_FLAG_EOS)) {
printf("Unknown flags\n");
/* FIXME: add error handling */
}
} while (!(flags & BLK_MIG_FLAG_EOS));
qemu_free(buf);
return 0;
}
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment