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bh=uujivRkrbPDnFSGK1q8xTJNc+5yDY0Si153FM8Fn30w=; b=RAlXith8Pn24S6Qb0zcD+MQZLx7VzAiqXx9ZXF1S+4linsqBKS77eGLj6eneye0znNWS/I njzMux8jyWFX/0W/UdYPJSx/olpXSmqLp2h3jAESNHheNIQeNe+r3iqcpp9sWTxJH5AzrB Qhhfa16pzFk8xmOV3jdmRd1WQqJRG0o= X-MC-Unique: 4wPIzq-aOSSmrtTvh16cPg-1 From: Kevin Wolf To: qemu-block@nongnu.org Subject: [PULL 15/39] block: add bdrv_list_* permission update functions Date: Fri, 30 Apr 2021 12:51:23 +0200 Message-Id: <20210430105147.125840-16-kwolf@redhat.com> In-Reply-To: <20210430105147.125840-1-kwolf@redhat.com> References: <20210430105147.125840-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kwolf@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.22, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, peter.maydell@linaro.org, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" From: Vladimir Sementsov-Ogievskiy Add new interface, allowing use of existing node list. It will be used to fix bdrv_replace_node() in the further commit. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Kevin Wolf Message-Id: <20210428151804.439460-16-vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf --- block.c | 106 +++++++++++++++++++++++++++++++++++++------------------- 1 file changed, 71 insertions(+), 35 deletions(-) diff --git a/block.c b/block.c index ab7a4d13d8..98b7bc179c 100644 --- a/block.c +++ b/block.c @@ -2249,7 +2249,8 @@ static int bdrv_drv_set_perm(BlockDriverState *bs, ui= nt64_t perm, static int bdrv_node_check_perm(BlockDriverState *bs, BlockReopenQueue *q, uint64_t cumulative_perms, uint64_t cumulative_shared_perms, - GSList *ignore_children, Error **errp) + GSList *ignore_children, + Transaction *tran, Error **errp) { BlockDriver *drv =3D bs->drv; BdrvChild *c; @@ -2297,7 +2298,7 @@ static int bdrv_node_check_perm(BlockDriverState *bs,= BlockReopenQueue *q, return 0; } =20 - ret =3D bdrv_drv_set_perm(bs, cumulative_perms, cumulative_shared_perm= s, NULL, + ret =3D bdrv_drv_set_perm(bs, cumulative_perms, cumulative_shared_perm= s, tran, errp); if (ret < 0) { return ret; @@ -2316,36 +2317,53 @@ static int bdrv_node_check_perm(BlockDriverState *b= s, BlockReopenQueue *q, bdrv_child_perm(bs, c->bs, c, c->role, q, cumulative_perms, cumulative_shared_perms, &cur_perm, &cur_shared); - bdrv_child_set_perm_safe(c, cur_perm, cur_shared, NULL); + bdrv_child_set_perm_safe(c, cur_perm, cur_shared, tran); } =20 return 0; } =20 -static int bdrv_check_perm(BlockDriverState *bs, BlockReopenQueue *q, - uint64_t cumulative_perms, - uint64_t cumulative_shared_perms, - GSList *ignore_children, Error **errp) +/* + * If use_cumulative_perms is true, use cumulative_perms and + * cumulative_shared_perms for first element of the list. Otherwise just r= efresh + * all permissions. + */ +static int bdrv_check_perm_common(GSList *list, BlockReopenQueue *q, + bool use_cumulative_perms, + uint64_t cumulative_perms, + uint64_t cumulative_shared_perms, + GSList *ignore_children, + Transaction *tran, Error **errp) { int ret; - BlockDriverState *root =3D bs; - g_autoptr(GSList) list =3D bdrv_topological_dfs(NULL, NULL, root); + BlockDriverState *bs; =20 - for ( ; list; list =3D list->next) { + if (use_cumulative_perms) { bs =3D list->data; =20 - if (bs !=3D root) { - if (bdrv_parent_perms_conflict(bs, ignore_children, errp)) { - return -EINVAL; - } + ret =3D bdrv_node_check_perm(bs, q, cumulative_perms, + cumulative_shared_perms, + ignore_children, tran, errp); + if (ret < 0) { + return ret; + } =20 - bdrv_get_cumulative_perm(bs, &cumulative_perms, - &cumulative_shared_perms); + list =3D list->next; + } + + for ( ; list; list =3D list->next) { + bs =3D list->data; + + if (bdrv_parent_perms_conflict(bs, ignore_children, errp)) { + return -EINVAL; } =20 + bdrv_get_cumulative_perm(bs, &cumulative_perms, + &cumulative_shared_perms); + ret =3D bdrv_node_check_perm(bs, q, cumulative_perms, cumulative_shared_perms, - ignore_children, errp); + ignore_children, tran, errp); if (ret < 0) { return ret; } @@ -2354,6 +2372,23 @@ static int bdrv_check_perm(BlockDriverState *bs, Blo= ckReopenQueue *q, return 0; } =20 +static int bdrv_check_perm(BlockDriverState *bs, BlockReopenQueue *q, + uint64_t cumulative_perms, + uint64_t cumulative_shared_perms, + GSList *ignore_children, Error **errp) +{ + g_autoptr(GSList) list =3D bdrv_topological_dfs(NULL, NULL, bs); + return bdrv_check_perm_common(list, q, true, cumulative_perms, + cumulative_shared_perms, ignore_children, + NULL, errp); +} + +static int bdrv_list_refresh_perms(GSList *list, BlockReopenQueue *q, + Transaction *tran, Error **errp) +{ + return bdrv_check_perm_common(list, q, false, 0, 0, NULL, tran, errp); +} + /* * Notifies drivers that after a previous bdrv_check_perm() call, the * permission update is not performed and any preparations made for it (e.= g. @@ -2375,15 +2410,19 @@ static void bdrv_node_abort_perm_update(BlockDriver= State *bs) } } =20 -static void bdrv_abort_perm_update(BlockDriverState *bs) +static void bdrv_list_abort_perm_update(GSList *list) { - g_autoptr(GSList) list =3D bdrv_topological_dfs(NULL, NULL, bs); - for ( ; list; list =3D list->next) { bdrv_node_abort_perm_update((BlockDriverState *)list->data); } } =20 +static void bdrv_abort_perm_update(BlockDriverState *bs) +{ + g_autoptr(GSList) list =3D bdrv_topological_dfs(NULL, NULL, bs); + return bdrv_list_abort_perm_update(list); +} + static void bdrv_node_set_perm(BlockDriverState *bs) { BlockDriver *drv =3D bs->drv; @@ -2407,15 +2446,19 @@ static void bdrv_node_set_perm(BlockDriverState *bs) } } =20 -static void bdrv_set_perm(BlockDriverState *bs) +static void bdrv_list_set_perm(GSList *list) { - g_autoptr(GSList) list =3D bdrv_topological_dfs(NULL, NULL, bs); - for ( ; list; list =3D list->next) { bdrv_node_set_perm((BlockDriverState *)list->data); } } =20 +static void bdrv_set_perm(BlockDriverState *bs) +{ + g_autoptr(GSList) list =3D bdrv_topological_dfs(NULL, NULL, bs); + return bdrv_list_set_perm(list); +} + void bdrv_get_cumulative_perm(BlockDriverState *bs, uint64_t *perm, uint64_t *shared_perm) { @@ -2523,20 +2566,13 @@ static int bdrv_check_update_perm(BlockDriverState = *bs, BlockReopenQueue *q, static int bdrv_refresh_perms(BlockDriverState *bs, Error **errp) { int ret; - uint64_t perm, shared_perm; + Transaction *tran =3D tran_new(); + g_autoptr(GSList) list =3D bdrv_topological_dfs(NULL, NULL, bs); =20 - if (bdrv_parent_perms_conflict(bs, NULL, errp)) { - return -EPERM; - } - bdrv_get_cumulative_perm(bs, &perm, &shared_perm); - ret =3D bdrv_check_perm(bs, NULL, perm, shared_perm, NULL, errp); - if (ret < 0) { - bdrv_abort_perm_update(bs); - return ret; - } - bdrv_set_perm(bs); + ret =3D bdrv_list_refresh_perms(list, NULL, tran, errp); + tran_finalize(tran, ret); =20 - return 0; + return ret; } =20 int bdrv_child_try_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared, --=20 2.30.2