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block: Update bs->options if bdrv_reopen() succeeds

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If bdrv_reopen() succeeds then bs->explicit_options is updated with
the new values, but bs->options never changes.

Here's an example:

   { "execute": "blockdev-add",
     "arguments": {
       "driver": "qcow2",
       "node-name": "hd0",
       "overlap-check": "all",
       "file": {
         "driver": "file",
         "filename": "hd0.qcow2"
       }
     }
   }

After this, both bs->options and bs->explicit_options contain
"overlap-check": "all".

Now let's change that using qemu-io's reopen command:

   (qemu) qemu-io hd0 "reopen -o overlap-check=none"

After this, bs->explicit_options contains the new value but
bs->options still keeps the old one.

This patch updates bs->options after a BDS has been successfully
reopened.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Alberto Garcia 2018-06-29 14:37:02 +03:00 committed by Kevin Wolf
parent 1bab38e7bd
commit 4c8350fe17
1 changed files with 14 additions and 1 deletions
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15
block.c
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@ -3055,8 +3055,8 @@ cleanup:
bdrv_reopen_abort(&bs_entry->state);
}
qobject_unref(bs_entry->state.explicit_options);
qobject_unref(bs_entry->state.options);
}
qobject_unref(bs_entry->state.options);
g_free(bs_entry);
}
g_free(bs_queue);
@ -3156,6 +3156,7 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
Error *local_err = NULL;
BlockDriver *drv;
QemuOpts *opts;
QDict *orig_reopen_opts;
const char *value;
bool read_only;
@ -3163,6 +3164,11 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
assert(reopen_state->bs->drv != NULL);
drv = reopen_state->bs->drv;
/* This function and each driver's bdrv_reopen_prepare() remove
* entries from reopen_state->options as they are processed, so
* we need to make a copy of the original QDict. */
orig_reopen_opts = qdict_clone_shallow(reopen_state->options);
/* Process generic block layer options */
opts = qemu_opts_create(&bdrv_runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, reopen_state->options, &local_err);
@ -3269,8 +3275,13 @@ int bdrv_reopen_prepare(BDRVReopenState *reopen_state, BlockReopenQueue *queue,
ret = 0;
/* Restore the original reopen_state->options QDict */
qobject_unref(reopen_state->options);
reopen_state->options = qobject_ref(orig_reopen_opts);
error:
qemu_opts_del(opts);
qobject_unref(orig_reopen_opts);
return ret;
}
@ -3300,8 +3311,10 @@ void bdrv_reopen_commit(BDRVReopenState *reopen_state)
/* set BDS specific flags now */
qobject_unref(bs->explicit_options);
qobject_unref(bs->options);
bs->explicit_options = reopen_state->explicit_options;
bs->options = reopen_state->options;
bs->open_flags = reopen_state->flags;
bs->read_only = !(reopen_state->flags & BDRV_O_RDWR);