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hw/9pfs: Fix assert when disabling migration

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For 9p we can get the attach request multiple times for the
same export. So don't adding migration blocker for every
attach request.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Aneesh Kumar K.V 2012-07-31 12:53:18 +05:30
parent b7d28d25fd
commit 4cdc0789ec
1 changed files with 10 additions and 5 deletions
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15
hw/9pfs/virtio-9p.c
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@ -983,11 +983,16 @@ static void v9fs_attach(void *opaque)
err += offset;
trace_v9fs_attach_return(pdu->tag, pdu->id,
qid.type, qid.version, qid.path);
s->root_fid = fid;
/* disable migration */
error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION,
s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag);
migrate_add_blocker(s->migration_blocker);
/*
* disable migration if we haven't done already.
* attach could get called multiple times for the same export.
*/
if (!s->migration_blocker) {
s->root_fid = fid;
error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION,
s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag);
migrate_add_blocker(s->migration_blocker);
}
out:
put_fid(pdu, fidp);
out_nofid: