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block: move ThrottleGroup membership to ThrottleGroupMember

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This commit eliminates the 1:1 relationship between BlockBackend and
throttle group state.  Users will be able to create multiple throttle
nodes, each with its own throttle group state, in the future.  The
throttle group state cannot be per-BlockBackend anymore, it must be
per-throttle node. This is done by gathering ThrottleGroup membership
details from BlockBackendPublic into ThrottleGroupMember and refactoring
existing code to use the structure.

Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Manos Pitsidianakis <el13635@mail.ntua.gr>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Manos Pitsidianakis 2017-08-25 16:20:23 +03:00 • committed by Kevin Wolf
parent 64182a6b8b
commit 022cdc9f40
7 changed files with 252 additions and 226 deletions
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4
blockdev.c
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@ -2686,7 +2686,7 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
if (throttle_enabled(&cfg)) {
/* Enable I/O limits if they're not enabled yet, otherwise
* just update the throttling group. */
if (!blk_get_public(blk)->throttle_state) {
if (!blk_get_public(blk)->throttle_group_member.throttle_state) {
blk_io_limits_enable(blk,
arg->has_group ? arg->group :
arg->has_device ? arg->device :
@ -2696,7 +2696,7 @@ void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
}
/* Set the new throttling configuration */
blk_set_io_limits(blk, &cfg);
} else if (blk_get_public(blk)->throttle_state) {
} else if (blk_get_public(blk)->throttle_group_member.throttle_state) {
/* If all throttling settings are set to 0, disable I/O limits */
blk_io_limits_disable(blk);
}