Re: [libvirt] [PATCH 1/7] qemu: Use switch in qemuMigrationCompleted

When adding a new job state it's useful to let the compiler complain about places where we need to think about what to do with the new state. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com&gt; --- src/qemu/qemu_migration.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c index 72edbb667..c3f9c38b2 100644 --- a/src/qemu/qemu_migration.c +++ b/src/qemu/qemu_migration.c @@ -1531,18 +1531,31 @@ qemuMigrationCompleted(virQEMUDriverPtr driver, return 0; error: - /* state can not be active or completed at this point */ - if (jobInfo->status == QEMU_DOMAIN_JOB_STATUS_MIGRATING || - jobInfo->status == QEMU_DOMAIN_JOB_STATUS_POSTCOPY) { + switch (jobInfo->status) { + case QEMU_DOMAIN_JOB_STATUS_MIGRATING: + case QEMU_DOMAIN_JOB_STATUS_POSTCOPY: /* The migration was aborted by us rather than QEMU itself. */ jobInfo->status = QEMU_DOMAIN_JOB_STATUS_FAILED; return -2; - } else if (jobInfo->status == QEMU_DOMAIN_JOB_STATUS_QEMU_COMPLETED) { + + case QEMU_DOMAIN_JOB_STATUS_QEMU_COMPLETED: + /* Something failed after QEMU already finished the migration. */ jobInfo->status = QEMU_DOMAIN_JOB_STATUS_FAILED; return -1; - } else { + + case QEMU_DOMAIN_JOB_STATUS_FAILED: + case QEMU_DOMAIN_JOB_STATUS_CANCELED: + /* QEMU aborted the migration. */ return -1; + + case QEMU_DOMAIN_JOB_STATUS_ACTIVE: + case QEMU_DOMAIN_JOB_STATUS_COMPLETED: + case QEMU_DOMAIN_JOB_STATUS_NONE: + /* Impossible. */ + break; } + + return -1; }

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