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librbd: remove snapshot mirror image-meta when disabling

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Remove the snapshot-based mirroring image-meta key/value pair
(if any) when disabling mirroring.

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
This commit is contained in:
Jason Dillaman 2020-02-24 17:33:51 -05:00
parent 86d39fb9ee
commit 281a64acf9
1 changed files with 87 additions and 68 deletions
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31
src/librbd/api/Mirror.cc
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@ -28,6 +28,7 @@
#include "librbd/mirror/snapshot/CreatePrimaryRequest.h"
#include "librbd/mirror/snapshot/ImageMeta.h"
#include "librbd/mirror/snapshot/UnlinkPeerRequest.h"
#include "librbd/mirror/snapshot/Utils.h"
#include <boost/algorithm/string/trim.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <boost/scope_exit.hpp>
@ -474,7 +475,8 @@ int Mirror<I>::image_disable(I *ictx, bool force) {
if (r < 0) {
lderr(cct) << "cannot disable mirroring: " << cpp_strerror(r) << dendl;
return r;
} else {
}
bool rollback = false;
BOOST_SCOPE_EXIT_ALL(ictx, &mirror_image_internal, &rollback) {
if (rollback) {
@ -489,8 +491,7 @@ int Mirror<I>::image_disable(I *ictx, bool force) {
}
};
{
std::shared_lock l{ictx->image_lock};
std::unique_lock image_locker{ictx->image_lock};
map<librados::snap_t, SnapInfo> snap_info = ictx->snap_info;
for (auto &info : snap_info) {
cls::rbd::ParentImageSpec parent_spec{ictx->md_ctx.get_id(),
@ -526,9 +527,9 @@ int Mirror<I>::image_disable(I *ictx, bool force) {
child_pool_id = child_image.pool_id;
}
cls::rbd::MirrorImage mirror_image_internal;
cls::rbd::MirrorImage child_mirror_image_internal;
r = cls_client::mirror_image_get(&child_io_ctx, child_image.image_id,
&mirror_image_internal);
&child_mirror_image_internal);
if (r != -ENOENT) {
rollback = true;
lderr(cct) << "mirroring is enabled on one or more children "
@ -537,6 +538,25 @@ int Mirror<I>::image_disable(I *ictx, bool force) {
}
}
}
image_locker.unlock();
if (mirror_image_internal.mode == cls::rbd::MIRROR_IMAGE_MODE_SNAPSHOT) {
// remove any snapshot-based mirroring image-meta from image
std::string mirror_uuid;
r = uuid_get(ictx->md_ctx, &mirror_uuid);
if (r < 0) {
rollback = true;
return r;
}
r = ictx->operations->metadata_remove(
mirror::snapshot::util::get_image_meta_key(mirror_uuid));
if (r < 0 && r != -ENOENT) {
lderr(cct) << "cannot remove snapshot image-meta key: " << cpp_strerror(r)
<< dendl;
rollback = true;
return r;
}
}
C_SaferCond ctx;
@ -558,7 +578,6 @@ int Mirror<I>::image_disable(I *ictx, bool force) {
// not fatal
}
}
}
return 0;
}