[dpdk-dev] [PATCH v11 0/9] vhost: support inflight share memory protocol feature
Jin Yu
jin.yu at intel.com
Wed Oct 9 22:48:28 CEST 2019
v2:
- specify the APIs are split-ring only
v3:
- fix APIs issues and judge split or packed
v4:
- add rte_vhost_ prefix and fix issues
v5:
- add the packed ring support and add the vhost_blk example
v6:
- revise get_vring_base func depend on Tiwei's suggestion
v7:
- divide patch into small patches
v8:
- updated base on Maxime's comments
v9:
- updated base on Tiwei's comments
v10:
- fix code style and update some misleading log
v11:
- add the version log to cover letter
This patches introduces two new messages VHOST_USER_GET_INFLIGHT_FD and VHOST_USER_SET_INFLIGHT_FD to support transferring a shared buffer between qemu and backend.
Now It can both support split and packed ring. The example code show how these API work. The test has passed.
How to test the example:
1, Qemu need two patches.
https://patchwork.kernel.org/patch/10766813/
https://patchwork.kernel.org/patch/10861411/(QEMU merged) it also needs some manual modifications:
we should confirm that before we send get inflight we have already sent the set features but it seems Qemu didn't do like this. So we manually revise this, we can add below code in vhost_dev_get_inflight
int r;
r = vhost_dev_set_features(dev, dev->log_enabled);
if (r < 0) {
return -errno;
}
before get_inflight_fd.
2, Guest OS version >= 5.0
3, run the example
4, run the qemu with vhost-user-blk-pci.
eg:
-chardev socket,id=spdk_vhost_blk0,reconnect=1,path=xxxx\
-device vhost-user-blk-pci,ring_packed=on,chardev=spdk_vhost_blk0,num-queues=1\
5, run fio in the guest
6, kill the example and run again.
7, the fio in the guest should continue run without errors.
Jin Yu (9):
vhost: add the inflight description
vhost: add packed ring
vhost: add the inflight structure
vhost: add two new messages to support a shared buffer
vhost: checkout the resubmit inflight information
vhost: add the APIs to operate inflight ring
vhost: add APIs for user getting inflight ring
vhost: add vring functions packed ring support
vhost: add vhost-user-blk example which support inflight
examples/vhost_blk/Makefile | 68 ++
examples/vhost_blk/blk.c | 125 +++
examples/vhost_blk/blk_spec.h | 95 +++
examples/vhost_blk/meson.build | 21 +
examples/vhost_blk/vhost_blk.c | 1092 ++++++++++++++++++++++++
examples/vhost_blk/vhost_blk.h | 128 +++
examples/vhost_blk/vhost_blk_compat.c | 195 +++++
lib/librte_vhost/rte_vhost.h | 237 ++++-
lib/librte_vhost/rte_vhost_version.map | 8 +
lib/librte_vhost/vhost.c | 407 ++++++++-
lib/librte_vhost/vhost.h | 16 +
lib/librte_vhost/vhost_user.c | 456 +++++++++-
lib/librte_vhost/vhost_user.h | 12 +-
13 files changed, 2847 insertions(+), 13 deletions(-)
create mode 100644 examples/vhost_blk/Makefile
create mode 100644 examples/vhost_blk/blk.c
create mode 100644 examples/vhost_blk/blk_spec.h
create mode 100644 examples/vhost_blk/meson.build
create mode 100644 examples/vhost_blk/vhost_blk.c
create mode 100644 examples/vhost_blk/vhost_blk.h
create mode 100644 examples/vhost_blk/vhost_blk_compat.c
--
2.17.2
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