motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

block/export: Allocate BlockExport in blk_exp_add()

Browse source 
Instead of letting the driver allocate and return the BlockExport
object, allocate it already in blk_exp_add() and pass it. This allows us
to initialise the generic part before calling into the driver so that
the driver can just use these values instead of having to parse the
options a second time.

For symmetry, move freeing the BlockExport to blk_exp_unref().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200924152717.287415-17-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2020-09-24 17:27:02 +02:00
parent b6076afcab
commit a6ff798966
5 changed files with 57 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

18
block/export/export.c
View file

@ -39,6 +39,8 @@ static const BlockExportDriver *blk_exp_find_driver(BlockExportType type)
BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp)
{
const BlockExportDriver *drv;
BlockExport *exp;
int ret;
drv = blk_exp_find_driver(export->type);
if (!drv) {
@ -46,7 +48,20 @@ BlockExport *blk_exp_add(BlockExportOptions *export, Error **errp)
return NULL;
}
return drv->create(export, errp);
assert(drv->instance_size >= sizeof(BlockExport));
exp = g_malloc0(drv->instance_size);
*exp = (BlockExport) {
.drv = drv,
.refcount = 1,
};
ret = drv->create(exp, export, errp);
if (ret < 0) {
g_free(exp);
return NULL;
}
return exp;
}
/* Callers must hold exp->ctx lock */
@ -62,6 +77,7 @@ void blk_exp_unref(BlockExport *exp)
assert(exp->refcount > 0);
if (--exp->refcount == 0) {
exp->drv->delete(exp);
g_free(exp);
}
}