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[PATCH v2 13/33] block: Add child_of_bds
From: |
Max Reitz |
Subject: |
[PATCH v2 13/33] block: Add child_of_bds |
Date: |
Tue, 4 Feb 2020 18:08:28 +0100 |
Any current user of child_file, child_format, and child_backing can and
should use this generic BdrvChildClass instead, as it can handle all of
these cases. However, to be able to do so, the users must pass the
appropriate BdrvChildRole when the child is created/attached. (The
following commits will take care of that.)
Signed-off-by: Max Reitz <address@hidden>
---
block.c | 27 +++++++++++++++++++++++++++
include/block/block_int.h | 1 +
2 files changed, 28 insertions(+)
diff --git a/block.c b/block.c
index 46fc08e227..1816e92674 100644
--- a/block.c
+++ b/block.c
@@ -1072,6 +1072,33 @@ static void bdrv_inherited_options(BdrvChildRole role,
bool parent_is_format,
*child_flags = flags;
}
+static int bdrv_backing_update_filename(BdrvChild *c, BlockDriverState *base,
+ const char *filename, Error **errp);
+
+static int bdrv_child_cb_update_filename(BdrvChild *c, BlockDriverState *base,
+ const char *filename, Error **errp)
+{
+ if (c->role & BDRV_CHILD_COW) {
+ return bdrv_backing_update_filename(c, base, filename, errp);
+ }
+ return 0;
+}
+
+const BdrvChildClass child_of_bds = {
+ .parent_is_bds = true,
+ .get_parent_desc = bdrv_child_get_parent_desc,
+ .inherit_options = bdrv_inherited_options,
+ .drained_begin = bdrv_child_cb_drained_begin,
+ .drained_poll = bdrv_child_cb_drained_poll,
+ .drained_end = bdrv_child_cb_drained_end,
+ .attach = bdrv_child_cb_attach,
+ .detach = bdrv_child_cb_detach,
+ .inactivate = bdrv_child_cb_inactivate,
+ .can_set_aio_ctx = bdrv_child_cb_can_set_aio_ctx,
+ .set_aio_ctx = bdrv_child_cb_set_aio_ctx,
+ .update_filename = bdrv_child_cb_update_filename,
+};
+
/*
* 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
diff --git a/include/block/block_int.h b/include/block/block_int.h
index f4c673620f..91883c1e80 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -740,6 +740,7 @@ struct BdrvChildClass {
void (*set_aio_ctx)(BdrvChild *child, AioContext *ctx, GSList **ignore);
};
+extern const BdrvChildClass child_of_bds;
extern const BdrvChildClass child_file;
extern const BdrvChildClass child_format;
extern const BdrvChildClass child_backing;
--
2.24.1
- Re: [PATCH v2 05/33] block: Pass BdrvChildRole to bdrv_child_perm(), (continued)
- [PATCH v2 09/33] block: Add generic bdrv_inherited_options(), Max Reitz, 2020/02/04
- [PATCH v2 08/33] block: Rename bdrv_inherited_options(), Max Reitz, 2020/02/04
- [PATCH v2 12/33] block: Unify bdrv_child_cb_detach(), Max Reitz, 2020/02/04
- [PATCH v2 14/33] block: Distinguish paths in *_format_default_perms, Max Reitz, 2020/02/04
- [PATCH v2 13/33] block: Add child_of_bds,
Max Reitz <=
- [PATCH v2 15/33] block: Pull out bdrv_default_perms_for_backing(), Max Reitz, 2020/02/04
- [PATCH v2 10/33] block: Use bdrv_inherited_options(), Max Reitz, 2020/02/04
- [PATCH v2 04/33] block: Add BdrvChildRole to BdrvChild, Max Reitz, 2020/02/04