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block: add bdrv_drv_set_perm transaction action 

Refactor calling driver callbacks to a separate transaction action to
be used later.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20210428151804.439460-15-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-04-28 18:17:42 +03:00 committed by Kevin Wolf
parent bd57f8f7f8
commit 2513ef5959
1 changed files with 54 additions and 16 deletions
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70
block.c
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@ -2189,6 +2189,54 @@ static void bdrv_child_set_perm_safe(BdrvChild *c, uint64_t perm,
}
}
static void bdrv_drv_set_perm_commit(void *opaque)
{
BlockDriverState *bs = opaque;
uint64_t cumulative_perms, cumulative_shared_perms;
if (bs->drv->bdrv_set_perm) {
bdrv_get_cumulative_perm(bs, &cumulative_perms,
&cumulative_shared_perms);
bs->drv->bdrv_set_perm(bs, cumulative_perms, cumulative_shared_perms);
}
}
static void bdrv_drv_set_perm_abort(void *opaque)
{
BlockDriverState *bs = opaque;
if (bs->drv->bdrv_abort_perm_update) {
bs->drv->bdrv_abort_perm_update(bs);
}
}
TransactionActionDrv bdrv_drv_set_perm_drv = {
.abort = bdrv_drv_set_perm_abort,
.commit = bdrv_drv_set_perm_commit,
};
static int bdrv_drv_set_perm(BlockDriverState *bs, uint64_t perm,
uint64_t shared_perm, Transaction *tran,
Error **errp)
{
if (!bs->drv) {
return 0;
}
if (bs->drv->bdrv_check_perm) {
int ret = bs->drv->bdrv_check_perm(bs, perm, shared_perm, errp);
if (ret < 0) {
return ret;
}
}
if (tran) {
tran_add(tran, &bdrv_drv_set_perm_drv, bs);
}
return 0;
}
/*
* Check whether permissions on this node can be changed in a way that
* @cumulative_perms and @cumulative_shared_perms are the new cumulative
@ -2249,12 +2297,10 @@ static int bdrv_node_check_perm(BlockDriverState *bs, BlockReopenQueue *q,
return 0;
}
if (drv->bdrv_check_perm) {
ret = drv->bdrv_check_perm(bs, cumulative_perms,
cumulative_shared_perms, errp);
if (ret < 0) {
return ret;
}
ret = bdrv_drv_set_perm(bs, cumulative_perms, cumulative_shared_perms, NULL,
errp);
if (ret < 0) {
return ret;
}
/* Drivers that never have children can omit .bdrv_child_perm() */
@ -2322,9 +2368,7 @@ static void bdrv_node_abort_perm_update(BlockDriverState *bs)
return;
}
if (drv->bdrv_abort_perm_update) {
drv->bdrv_abort_perm_update(bs);
}
bdrv_drv_set_perm_abort(bs);
QLIST_FOREACH(c, &bs->children, next) {
bdrv_child_set_perm_abort(c);
@ -2342,7 +2386,6 @@ static void bdrv_abort_perm_update(BlockDriverState *bs)
static void bdrv_node_set_perm(BlockDriverState *bs)
{
uint64_t cumulative_perms, cumulative_shared_perms;
BlockDriver *drv = bs->drv;
BdrvChild *c;
@ -2350,12 +2393,7 @@ static void bdrv_node_set_perm(BlockDriverState *bs)
return;
}
bdrv_get_cumulative_perm(bs, &cumulative_perms, &cumulative_shared_perms);
/* Update this node */
if (drv->bdrv_set_perm) {
drv->bdrv_set_perm(bs, cumulative_perms, cumulative_shared_perms);
}
bdrv_drv_set_perm_commit(bs);
/* Drivers that never have children can omit .bdrv_child_perm() */
if (!drv->bdrv_child_perm) {