[dpdk-dev] [PATCH v11 00/11] introduce fail-safe PMD

[Ferruh Yigit]

On 7/18/2017 5:08 PM, Ferruh Yigit wrote:
> On 7/18/2017 1:48 PM, Gaetan Rivet wrote:
>> This PMD intercepts and manages Ethernet device removal events issued by
>> slave PMDs and re-initializes them transparently when brought back so that
>> existing applications do not need to be modified to benefit from true
>> hot-plugging support.
>>
>> The stacked PMD approach shares many similarities with the bonding PMD but
>> with a different purpose. While bonding provides the ability to group
>> several links into a single logical device for enhanced throughput and
>> supports fail-over at link level, this one manages the sudden disappearance
>> of the underlying device; it guarantees applications face a valid device in
>> working order at all times.
>>
>> Each fail-safe instance is configured to run atop one or several
>> devices, with one defined as the preferred device. Hot-plug events are
>> handled on all of them, and Tx is always directed to the preferred device
>> if present or to the next available failover device (Rx is always performed
>> on all devices for simplicity).
>>
>> Moreover, the configured slaves (preferred or failover) do not need to be
>> present at initialization time and may appear later.
>>
>> Slaves configuration is continuously synchronized with that of the virtual
>> device, which exposes their common set of capabilities to the application.
>> Failure to apply the current configuration state to a slave for any reason
>> simply reschedules its initialization.
>>
>> This patchset depends on:
>>
>> [dpdk-dev] [PATCH v4 0/8] fix hotplug API
>> http://dpdk.org/ml/archives/dev/2017-July/071340.html
>>
>> v1 --> v2:
>>
>>   - Wrote documentation
>>   - Fixed commit logs, signed-off-by
>>   - Added LSC event support
>>   - A few minor fixes
>>
>> v2 --> v3:
>>
>>   - Numerous bug fixes.
>>   - Complete sub-EAL rework to follow new bus API.
>>   - burst protection on sub removal.
>>   - more flexible sub definition.
>>   - flow isolated mode support.
>>
>> v3 --> v4:
>>
>>   - Split back commits
>>        net/failsafe: add fast burst functions
>>        net/failsafe: support device removal
>>     That were squashed by error during a rebase
>>   - Fix segfault on port plugin
>>   - Fix isolate mode support for MLX4 ports plugin
>>
>> v4 --> v5:
>>
>>   - Follow new plug / unplug API.
>>
>> v5 --> v6:
>>
>>   - Follow new hotplug API.
>>   - Improve usability of hotplug API.
>>   - Fix rte_dev hotplug API implementation.
>>   - Introduce rte_eal_devargs_rmv API as EXPERIMENTAL.
>>   - Use it to clean up resources on hotplug_remove.
>>   - Fix hotplug implementation and support un pci bus.
>>     The scan was not idempotent, nor clean.
>>     Neither were the device fields.
>>   - Implement plug operation for vdev bus.
>>     This is needed for hotplug support and to make the EAL
>>     independent from vdev-specific API.
>>   - Remove useless parameters from plug / unplug API.
>>
>> This patchset is fairly big and complex. The hotplug API has been rushed and
>> has never been tested outside of the special case of vdev bus.
>>
>> These evolutions are proposed alongside this PMD as only this PMD allows to test
>> this API at the moment, and without those evolutions this PMD cannot be used.
>>
>> v6 --> v7
>>
>>   - Split the series in three, with
>>     vlan filter configuration store standing alone
>>     Hotplug API fixes separated
>>     Fail-safe PMD on its own.
>>
>>     These changes should ease integration.
>>
>> v7 --> v8
>>
>>   - Fix usage examples in documentation.
>>   - Use rte_eth_dev_allocated when relevant.
>>
>> v8 --> v9
>>
>>   - Use calloc instead of rte_realloc for command line parsing.
>>   - Include errno only when necessary.
>>
>> v9 --> v10
>>
>>   - Fix rte_flow description double-free issue.
>>     Thanks Raslan for finding the issue :)
>>   - Use RTE_ASSERT instead of assert.
>>     Integrate the debug log of the fail-safe to
>>     RTE_LOG_DEBUG macro as well, allowing dynamic log levels.
>>   - Remove devices post-state-sync during slave upkeep,
>>     to avoid a useless early probe attempt.
>>
>> v10 --> v11
>>
>>   - Added Glossary in documentation.
>>   - Fixed issues oulined in [1].
>>   - Removed Rx offload advertizement in feature matrix.
>>
>> [1]: http://dpdk.org/ml/archives/dev/2017-July/071406.html
>>
>> Gaetan Rivet (11):
>>   ethdev: add deferred intermediate device state
>>   ethdev: count devices consistently
>>   net/failsafe: add fail-safe PMD
>>   net/failsafe: add plug-in support
>>   net/failsafe: add flexible device definition
>>   net/failsafe: support flow API
>>   net/failsafe: support Rx offload capabilities
>>   net/failsafe: add fast burst functions
>>   net/failsafe: support device removal
>>   net/failsafe: support link status change event
>>   net/failsafe: support flow API isolation mode
> 
> Series applied to dpdk-next-net/master, thanks.

Hi Gaetan,

Can you please send a patch to update release notes to announce the new PMD?

And can you also send a web page to list the PMD within supported NICs [1]?

Thanks,
ferruh

[1]
http://dpdk.org/doc/nics