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Add readonly flag

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This commit is contained in:
Vitaliy Filippov
2019-12-01 16:41:07 +03:00
parent 9260cd263a
commit 76655929c4
4 changed files with 46 additions and 24 deletions
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blockstore.cpp
+8 -4
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@@ -178,7 +178,10 @@ void blockstore::loop()
}
}
}
flusher->loop();
if (!readonly)
{
flusher->loop();
}
int ret = ringloop->submit();
if (ret < 0)
{
@@ -191,13 +194,13 @@ bool blockstore::is_safe_to_stop()
{
// It's safe to stop blockstore when there are no in-flight operations,
// no in-progress syncs and flusher isn't doing anything
if (submit_queue.size() > 0 || in_progress_syncs.size() > 0 || flusher->is_active())
if (submit_queue.size() > 0 || in_progress_syncs.size() > 0 || !readonly && flusher->is_active())
{
return false;
}
if (unsynced_big_writes.size() > 0 || unsynced_small_writes.size() > 0)
{
if (!stop_sync_submitted)
if (!readonly && !stop_sync_submitted)
{
// We should sync the blockstore before unmounting
blockstore_operation *op = new blockstore_operation;
@@ -275,7 +278,8 @@ void blockstore::enqueue_op(blockstore_operation *op)
{
int type = op->flags & OP_TYPE_MASK;
if (type < OP_READ || type > OP_DELETE || (type == OP_READ || type == OP_WRITE) &&
(op->offset >= block_size || op->len > block_size-op->offset || (op->len % DISK_ALIGNMENT)))
(op->offset >= block_size || op->len > block_size-op->offset || (op->len % DISK_ALIGNMENT)) ||
readonly && type != OP_READ)
{
// Basic verification not passed
op->retval = -EINVAL;