nvme-tcp: fix request PDU size when header digest is enabled

Since commit 61b0ed3be81b ("nvme-tcp: parallelize I/O queue allocation
and startup") the I/O tag set is allocated before the I/O queues.
nvme_tcp_init_request() sizes the PDU with nvme_tcp_hdgst_len(queue),
but queue->hdr_digest is only set later by nvme_tcp_alloc_queue(), so
every I/O PDU is allocated without room for the header digest.

With hdr_digest enabled, the digest is then written 4 bytes past the
PDU, over the header of the next PDU in the page_frag cache, and the
target drops the connection on the first I/O:

  nvmet_tcp: unexpected pdu type 159
  nvmet: ctrl 1 fatal error occurred!

Queues that a later reconnect adds for the first time have the same
problem.

Set queue->hdr_digest when allocating the controller, together with
pf_cache_lock, so it is valid before any request is initialized.

Fixes: 61b0ed3be81b ("nvme-tcp: parallelize I/O queue allocation and startup")
Signed-off-by: Christian Aurich Zanettini Martins <christian.aurichzm@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>

0 files changed, 0 insertions, 0 deletions