vhost: add logging mechanism for reconnection

This patch introduces a way for backend to keep track
of the needed information to be able to reconnect without
frontend cooperation.

It will be used f

vhost: add logging mechanism for reconnection

This patch introduces a way for backend to keep track
of the needed information to be able to reconnect without
frontend cooperation.

It will be used for VDUSE, which does not provide interface
for the backend to save and later recover local virtqueues
metadata needed to reconnect.

Vhost-user support could also be added for improved packed
ring reconnection support.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbox@nvidia.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>

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lib: replace logging helpers

This is a preparation step before the next change.

Many libraries have their own logging helpers that do not add a newline
in their format string.
Some previous changes

lib: replace logging helpers

This is a preparation step before the next change.

Many libraries have their own logging helpers that do not add a newline
in their format string.
Some previous changes fixed places where some of those helpers are
called without a trailing newline.
Using RTE_LOG_LINE in the existing helpers will ensure we don't
introduce new issues in the future.

The problem is that if we simply convert to the RTE_LOG_LINE helper,
a future fix may introduce a regression since the logging helper
change won't be backported.

To address this concern, rename existing helpers: backporting a call to
them will trigger some conflict or build issue in LTS branches.

Note:
- bpf and vhost that still has some debug multilines messages, a direct
call to RTE_LOG/RTE_LOG_DP is used: this will make it easier to notice
such special cases,
- about previously publicly exposed logging helpers, when such helper is
not publicly used (iow in public inline API), it is removed from the
public API (this is the case for the member library),

Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

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vhost: use stdatomic API

Replace the use of gcc builtin __atomic_xxx intrinsics with
corresponding rte_atomic_xxx optional stdatomic API

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

vhost: use stdatomic API

Replace the use of gcc builtin __atomic_xxx intrinsics with
corresponding rte_atomic_xxx optional stdatomic API

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: David Marchand <david.marchand@redhat.com>

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vhost: add control virtqueue

In order to support multi-queue with VDUSE, having
control queue support is required.

This patch adds control queue implementation, it will be
used later when adding VD

vhost: add control virtqueue

In order to support multi-queue with VDUSE, having
control queue support is required.

This patch adds control queue implementation, it will be
used later when adding VDUSE support. Only split ring
layout is supported for now, packed ring support will be
added later.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
Acked-by: David Marchand <david.marchand@redhat.com>

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