From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46879) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gX4ZM-0003bD-3z for qemu-devel@nongnu.org; Wed, 12 Dec 2018 08:28:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gX4ZK-0001sM-VE for qemu-devel@nongnu.org; Wed, 12 Dec 2018 08:28:56 -0500 From: Kevin Wolf Date: Wed, 12 Dec 2018 14:27:32 +0100 Message-Id: <20181212132735.16080-39-kwolf@redhat.com> In-Reply-To: <20181212132735.16080-1-kwolf@redhat.com> References: <20181212132735.16080-1-kwolf@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PULL 38/41] block: Stop passing flags to bdrv_reopen_queue_child() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: kwolf@redhat.com, peter.maydell@linaro.org, qemu-devel@nongnu.org From: Alberto Garcia Now that all callers are passing the new options using the QDict we no longer need the 'flags' parameter. This patch makes the following changes: 1) The update_options_from_flags() call is no longer necessary so it can be removed. 2) The update_flags_from_options() call is now used in all cases, and is moved down a few lines so it happens after the options QDict contains the final set of values. 3) The flags parameter is removed. Now the flags are initialized using the current value (for the top-level node) or the parent flags (after inherit_options()). In both cases the initial values are updated to reflect the new options in the QDict. This happens in bdrv_reopen_queue_child() (as explained above) and in bdrv_reopen_prepare(). Signed-off-by: Alberto Garcia Reviewed-by: Max Reitz Signed-off-by: Kevin Wolf --- block.c | 48 +++++++++++++++++++----------------------------- 1 file changed, 19 insertions(+), 29 deletions(-) diff --git a/block.c b/block.c index 800c341244..cb354438be 100644 --- a/block.c +++ b/block.c @@ -2931,7 +2931,6 @@ BlockDriverState *bdrv_open(const char *filename, c= onst char *reference, static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_qu= eue, BlockDriverState *bs, QDict *options, - int flags, const BdrvChildRole *ro= le, QDict *parent_options, int parent_flags) @@ -2940,7 +2939,9 @@ static BlockReopenQueue *bdrv_reopen_queue_child(Bl= ockReopenQueue *bs_queue, =20 BlockReopenQueueEntry *bs_entry; BdrvChild *child; - QDict *old_options, *explicit_options; + QDict *old_options, *explicit_options, *options_copy; + int flags; + QemuOpts *opts; =20 /* Make sure that the caller remembered to use a drained section. Th= is is * important to avoid graph changes between the recursive queuing he= re and @@ -2966,22 +2967,11 @@ static BlockReopenQueue *bdrv_reopen_queue_child(= BlockReopenQueue *bs_queue, /* * Precedence of options: * 1. Explicitly passed in options (highest) - * 2. Set in flags (only for top level) - * 3. Retained from explicitly set options of bs - * 4. Inherited from parent node - * 5. Retained from effective options of bs + * 2. Retained from explicitly set options of bs + * 3. Inherited from parent node + * 4. Retained from effective options of bs */ =20 - if (!parent_options) { - /* - * Any setting represented by flags is always updated. If the - * corresponding QDict option is set, it takes precedence. Other= wise - * the flag is translated into a QDict option. The old setting o= f bs is - * not considered. - */ - update_options_from_flags(options, flags); - } - /* Old explicitly set values (don't overwrite by inherited value) */ if (bs_entry) { old_options =3D qdict_clone_shallow(bs_entry->state.explicit_opt= ions); @@ -2995,16 +2985,10 @@ static BlockReopenQueue *bdrv_reopen_queue_child(= BlockReopenQueue *bs_queue, =20 /* Inherit from parent node */ if (parent_options) { - QemuOpts *opts; - QDict *options_copy; - assert(!flags); + flags =3D 0; role->inherit_options(&flags, options, parent_flags, parent_opti= ons); - options_copy =3D qdict_clone_shallow(options); - opts =3D qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_ab= ort); - qemu_opts_absorb_qdict(opts, options_copy, NULL); - update_flags_from_options(&flags, opts); - qemu_opts_del(opts); - qobject_unref(options_copy); + } else { + flags =3D bdrv_get_flags(bs); } =20 /* Old values are used for options that aren't set yet */ @@ -3012,6 +2996,14 @@ static BlockReopenQueue *bdrv_reopen_queue_child(B= lockReopenQueue *bs_queue, bdrv_join_options(bs, options, old_options); qobject_unref(old_options); =20 + /* We have the final set of options so let's update the flags */ + options_copy =3D qdict_clone_shallow(options); + opts =3D qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_abort)= ; + qemu_opts_absorb_qdict(opts, options_copy, NULL); + update_flags_from_options(&flags, opts); + qemu_opts_del(opts); + qobject_unref(options_copy); + /* bdrv_open_inherit() sets and clears some additional flags interna= lly */ flags &=3D ~BDRV_O_PROTOCOL; if (flags & BDRV_O_RDWR) { @@ -3051,7 +3043,7 @@ static BlockReopenQueue *bdrv_reopen_queue_child(Bl= ockReopenQueue *bs_queue, qdict_extract_subqdict(options, &new_child_options, child_key_do= t); g_free(child_key_dot); =20 - bdrv_reopen_queue_child(bs_queue, child->bs, new_child_options, = 0, + bdrv_reopen_queue_child(bs_queue, child->bs, new_child_options, child->role, options, flags); } =20 @@ -3062,9 +3054,7 @@ BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueu= e *bs_queue, BlockDriverState *bs, QDict *options) { - int flags =3D bdrv_get_flags(bs); - return bdrv_reopen_queue_child(bs_queue, bs, options, flags, - NULL, NULL, 0); + return bdrv_reopen_queue_child(bs_queue, bs, options, NULL, NULL, 0)= ; } =20 /* --=20 2.19.2