From: Max Reitz Date: Wed, 13 May 2020 11:05:17 +0000 (+0200) Subject: block: Pass BdrvChildRole to .inherit_options() X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=272c02eaef0388225c1dcdbec99b2e838bb64d23;p=qmiga%2Fqemu.git block: Pass BdrvChildRole to .inherit_options() For now, all callers (effectively) pass 0 and no callee evaluates thie value. Later patches will change both. Signed-off-by: Max Reitz Reviewed-by: Eric Blake Message-Id: <20200513110544.176672-8-mreitz@redhat.com> Signed-off-by: Kevin Wolf --- diff --git a/block.c b/block.c index 5d9a331f5b..40db0b78b9 100644 --- a/block.c +++ b/block.c @@ -77,6 +77,7 @@ static BlockDriverState *bdrv_open_inherit(const char *filename, QDict *options, int flags, BlockDriverState *parent, const BdrvChildClass *child_class, + BdrvChildRole child_role, Error **errp); /* If non-zero, use only whitelisted block drivers */ @@ -1153,7 +1154,8 @@ static void bdrv_temp_snapshot_options(int *child_flags, QDict *child_options, * Returns the options and flags that bs->file should get if a protocol driver * is expected, based on the given options and flags for the parent BDS */ -static void bdrv_inherited_options(int *child_flags, QDict *child_options, +static void bdrv_inherited_options(BdrvChildRole role, + int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options) { int flags = parent_flags; @@ -1202,10 +1204,11 @@ const BdrvChildClass child_file = { * (and not only protocols) is permitted for it, based on the given options and * flags for the parent BDS */ -static void bdrv_inherited_fmt_options(int *child_flags, QDict *child_options, +static void bdrv_inherited_fmt_options(BdrvChildRole role, + int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options) { - child_file.inherit_options(child_flags, child_options, + child_file.inherit_options(role, child_flags, child_options, parent_flags, parent_options); *child_flags &= ~(BDRV_O_PROTOCOL | BDRV_O_NO_IO); @@ -1286,7 +1289,8 @@ static void bdrv_backing_detach(BdrvChild *c) * Returns the options and flags that bs->backing should get, based on the * given options and flags for the parent BDS */ -static void bdrv_backing_options(int *child_flags, QDict *child_options, +static void bdrv_backing_options(BdrvChildRole role, + int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options) { int flags = parent_flags; @@ -2876,7 +2880,7 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *parent_options, } backing_hd = bdrv_open_inherit(backing_filename, reference, options, 0, bs, - &child_backing, errp); + &child_backing, 0, errp); if (!backing_hd) { bs->open_flags |= BDRV_O_NO_BACKING; error_prepend(errp, "Could not open backing file: "); @@ -2911,7 +2915,7 @@ free_exit: static BlockDriverState * bdrv_open_child_bs(const char *filename, QDict *options, const char *bdref_key, BlockDriverState *parent, const BdrvChildClass *child_class, - bool allow_none, Error **errp) + BdrvChildRole child_role, bool allow_none, Error **errp) { BlockDriverState *bs = NULL; QDict *image_options; @@ -2942,7 +2946,7 @@ bdrv_open_child_bs(const char *filename, QDict *options, const char *bdref_key, } bs = bdrv_open_inherit(filename, reference, image_options, 0, - parent, child_class, errp); + parent, child_class, child_role, errp); if (!bs) { goto done; } @@ -2976,7 +2980,7 @@ BdrvChild *bdrv_open_child(const char *filename, BlockDriverState *bs; bs = bdrv_open_child_bs(filename, options, bdref_key, parent, child_class, - allow_none, errp); + child_role, allow_none, errp); if (bs == NULL) { return NULL; } @@ -3020,7 +3024,7 @@ BlockDriverState *bdrv_open_blockdev_ref(BlockdevRef *ref, Error **errp) } - bs = bdrv_open_inherit(NULL, reference, qdict, 0, NULL, NULL, errp); + bs = bdrv_open_inherit(NULL, reference, qdict, 0, NULL, NULL, 0, errp); obj = NULL; qobject_unref(obj); visit_free(v); @@ -3117,6 +3121,7 @@ static BlockDriverState *bdrv_open_inherit(const char *filename, QDict *options, int flags, BlockDriverState *parent, const BdrvChildClass *child_class, + BdrvChildRole child_role, Error **errp) { int ret; @@ -3169,7 +3174,7 @@ static BlockDriverState *bdrv_open_inherit(const char *filename, if (child_class) { bs->inherits_from = parent; - child_class->inherit_options(&flags, options, + child_class->inherit_options(child_role, &flags, options, parent->open_flags, parent->options); } @@ -3198,7 +3203,7 @@ static BlockDriverState *bdrv_open_inherit(const char *filename, flags, options); /* Let bdrv_backing_options() override "read-only" */ qdict_del(options, BDRV_OPT_READ_ONLY); - bdrv_backing_options(&flags, options, flags, options); + bdrv_backing_options(0, &flags, options, flags, options); } bs->open_flags = flags; @@ -3240,7 +3245,7 @@ static BlockDriverState *bdrv_open_inherit(const char *filename, BlockDriverState *file_bs; file_bs = bdrv_open_child_bs(filename, options, "file", bs, - &child_file, true, &local_err); + &child_file, 0, true, &local_err); if (local_err) { goto fail; } @@ -3385,7 +3390,7 @@ BlockDriverState *bdrv_open(const char *filename, const char *reference, QDict *options, int flags, Error **errp) { return bdrv_open_inherit(filename, reference, options, flags, NULL, - NULL, errp); + NULL, 0, errp); } /* Return true if the NULL-terminated @list contains @str */ @@ -3482,6 +3487,7 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue, BlockDriverState *bs, QDict *options, const BdrvChildClass *klass, + BdrvChildRole role, QDict *parent_options, int parent_flags, bool keep_old_opts) @@ -3537,7 +3543,8 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue, /* Inherit from parent node */ if (parent_options) { flags = 0; - klass->inherit_options(&flags, options, parent_flags, parent_options); + klass->inherit_options(role, &flags, options, + parent_flags, parent_options); } else { flags = bdrv_get_flags(bs); } @@ -3628,7 +3635,8 @@ static BlockReopenQueue *bdrv_reopen_queue_child(BlockReopenQueue *bs_queue, } bdrv_reopen_queue_child(bs_queue, child->bs, new_child_options, - child->klass, options, flags, child_keep_old); + child->klass, child->role, options, flags, + child_keep_old); } return bs_queue; @@ -3638,7 +3646,7 @@ BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue, BlockDriverState *bs, QDict *options, bool keep_old_opts) { - return bdrv_reopen_queue_child(bs_queue, bs, options, NULL, NULL, 0, + return bdrv_reopen_queue_child(bs_queue, bs, options, NULL, 0, NULL, 0, keep_old_opts); } diff --git a/block/block-backend.c b/block/block-backend.c index efc7acb3d8..5539ca8816 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -120,7 +120,8 @@ static QTAILQ_HEAD(, BlockBackend) block_backends = static QTAILQ_HEAD(, BlockBackend) monitor_block_backends = QTAILQ_HEAD_INITIALIZER(monitor_block_backends); -static void blk_root_inherit_options(int *child_flags, QDict *child_options, +static void blk_root_inherit_options(BdrvChildRole role, + int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options) { /* We're not supposed to call this function for root nodes */ diff --git a/block/vvfat.c b/block/vvfat.c index 6cf3c74fe3..4033e4f369 100644 --- a/block/vvfat.c +++ b/block/vvfat.c @@ -3128,7 +3128,8 @@ static BlockDriver vvfat_write_target = { .bdrv_co_pwritev = write_target_commit, }; -static void vvfat_qcow_options(int *child_flags, QDict *child_options, +static void vvfat_qcow_options(BdrvChildRole role, + int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options) { qdict_set_default_str(child_options, BDRV_OPT_READ_ONLY, "off"); diff --git a/include/block/block_int.h b/include/block/block_int.h index dc4bc486d6..8c1160a577 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -677,7 +677,8 @@ struct BdrvChildClass { * non-BDS parents. */ bool parent_is_bds; - void (*inherit_options)(int *child_flags, QDict *child_options, + void (*inherit_options)(BdrvChildRole role, + int *child_flags, QDict *child_options, int parent_flags, QDict *parent_options); void (*change_media)(BdrvChild *child, bool load);