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Message-ID: <20251217084422.4875-11-15927021679@163.com>
Date: Wed, 17 Dec 2025 16:43:35 +0800
From: Xiong Weimin <15927021679@....com>
To: Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Stanislav Fomichev <sdf@...ichev.me>
Cc: linux-kernel@...r.kernel.org,
netdev@...r.kernel.org,
xiongweimin <xiongweimin@...inos.cn>
Subject: [PATCH 09/14] examples/vhost_user_rdma: implement P_Key query operation with default partition key
From: xiongweimin <xiongweimin@...inos.cn>
This commit adds support for the IB_QUERY_PKEY command:
1. Implements mandatory InfiniBand partition key query
2. Provides default full-membership P_Key (0xFFFF)
3. Includes I/O vector safety validation
4. Maintains compatibility with standard IB management tools
Key features:
- Hardcoded default P_Key for simplified management
- Buffer size validation using CHK_IOVEC macro
- Zero-copy response writing via iovec
- Minimal overhead for frequent management operations
Signed-off-by: Xiong Weimin <xiongweimin@...inos.cn>
Change-Id: Ibc7be3488989285da205aff7400be38995a435fd
---
examples/vhost_user_rdma/meson.build | 52 ++++++++++++------------
examples/vhost_user_rdma/vhost_rdma_ib.c | 46 ++++++++++++++-------
examples/vhost_user_rdma/vhost_rdma_ib.h | 4 ++
3 files changed, 61 insertions(+), 41 deletions(-)
diff --git a/examples/vhost_user_rdma/meson.build b/examples/vhost_user_rdma/meson.build
index 4948f709d9..89ff4fbbf1 100644
--- a/examples/vhost_user_rdma/meson.build
+++ b/examples/vhost_user_rdma/meson.build
@@ -7,8 +7,8 @@
# DPDK instance, use 'make'
if not is_linux
- build = false
- subdir_done()
+ build = false
+ subdir_done()
endif
deps += ['vhost', 'timer']
@@ -16,35 +16,35 @@ deps += ['vhost', 'timer']
allow_experimental_apis = true
cflags_options = [
- '-std=c11',
- '-Wno-strict-prototypes',
- '-Wno-pointer-arith',
- '-Wno-maybe-uninitialized',
- '-Wno-discarded-qualifiers',
- '-Wno-old-style-definition',
- '-Wno-sign-compare',
- '-Wno-stringop-overflow',
- '-O3',
- '-g',
- '-DALLOW_EXPERIMENTAL_API',
- '-DDEBUG_RDMA',
- '-DDEBUG_RDMA_DP',
+ '-std=c11',
+ '-Wno-strict-prototypes',
+ '-Wno-pointer-arith',
+ '-Wno-maybe-uninitialized',
+ '-Wno-discarded-qualifiers',
+ '-Wno-old-style-definition',
+ '-Wno-sign-compare',
+ '-Wno-stringop-overflow',
+ '-O3',
+ '-g',
+ '-DALLOW_EXPERIMENTAL_API',
+ '-DDEBUG_RDMA',
+ '-DDEBUG_RDMA_DP',
]
foreach option:cflags_options
- if cc.has_argument(option)
- cflags += option
- endif
+ if cc.has_argument(option)
+ cflags += option
+ endif
endforeach
sources = files(
- 'main.c',
- 'vhost_rdma.c',
- 'vhost_rdma_ib.c',
- 'vhost_rdma_queue.c',
- 'vhost_rdma_opcode.c',
- 'vhost_rdma_pkt.c',
- 'vhost_rdma_crc.c',
- 'vhost_rdma_complete.c',
+ 'main.c',
+ 'vhost_rdma.c',
+ 'vhost_rdma_ib.c',
+ 'vhost_rdma_queue.c',
+ 'vhost_rdma_opcode.c',
+ 'vhost_rdma_pkt.c',
+ 'vhost_rdma_crc.c',
+ 'vhost_rdma_complete.c',
)
diff --git a/examples/vhost_user_rdma/vhost_rdma_ib.c b/examples/vhost_user_rdma/vhost_rdma_ib.c
index aac5c28e9a..437d45c5ce 100644
--- a/examples/vhost_user_rdma/vhost_rdma_ib.c
+++ b/examples/vhost_user_rdma/vhost_rdma_ib.c
@@ -36,7 +36,7 @@
tp = iov->iov_base; \
} while(0); \
-#define DEFINE_VIRTIO_RDMA_CMD(cmd, handler) [cmd] = {handler, #cmd}
+#define DEFINE_VHOST_RDMA_CMD(cmd, handler) [cmd] = {handler, #cmd}
#define CTRL_NO_CMD __rte_unused struct iovec *__in
#define CTRL_NO_RSP __rte_unused struct iovec *__out
@@ -1089,25 +1089,41 @@ vhost_rdma_destroy_qp(struct vhost_rdma_device *dev, struct iovec *in, CTRL_NO_R
return 0;
}
+static int
+vhost_rdma_query_pkey(__rte_unused struct vhost_rdma_device *dev,
+ CTRL_NO_CMD, struct iovec *out)
+{
+ struct vhost_rdma_cmd_query_pkey *pkey_rsp;
+ uint16_t pkey = IB_DEFAULT_PKEY_FULL;
+
+ CHK_IOVEC(pkey_rsp, out);
+
+ pkey_rsp->pkey = pkey;
+
+ return 0;
+
+}
+
/* Command handler table declaration */
struct {
int (*handler)(struct vhost_rdma_device *dev, struct iovec *in, struct iovec *out);
const char *name; /* Name of the command (for logging) */
} cmd_tbl[] = {
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_DEVICE, vhost_rdma_query_device),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_PORT, vhost_rdma_query_port),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_CREATE_CQ, vhost_rdma_create_cq),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DESTROY_CQ, vhost_rdma_destroy_cq),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_CREATE_PD, vhost_rdma_create_pd),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DESTROY_PD, vhost_rdma_destroy_pd),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_GET_DMA_MR, vhost_rdma_get_dma_mr),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_ALLOC_MR, vhost_rdma_alloc_mr),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_REG_USER_MR, vhost_rdma_reg_user_mr),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DEREG_MR, vhost_rdma_dereg_mr),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_CREATE_QP, vhost_rdma_create_qp),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_MODIFY_QP, vhost_rdma_modify_qp),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_QP, vhost_rdma_query_qp),
- DEFINE_VIRTIO_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DESTROY_QP, vhost_rdma_destroy_qp),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_DEVICE, vhost_rdma_query_device),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_PORT, vhost_rdma_query_port),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_CREATE_CQ, vhost_rdma_create_cq),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DESTROY_CQ, vhost_rdma_destroy_cq),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_CREATE_PD, vhost_rdma_create_pd),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DESTROY_PD, vhost_rdma_destroy_pd),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_GET_DMA_MR, vhost_rdma_get_dma_mr),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_ALLOC_MR, vhost_rdma_alloc_mr),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_REG_USER_MR, vhost_rdma_reg_user_mr),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DEREG_MR, vhost_rdma_dereg_mr),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_CREATE_QP, vhost_rdma_create_qp),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_MODIFY_QP, vhost_rdma_modify_qp),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_QP, vhost_rdma_query_qp),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_DESTROY_QP, vhost_rdma_destroy_qp),
+ DEFINE_VHOST_RDMA_CMD(VHOST_RDMA_CTRL_ROCE_QUERY_PKEY, vhost_rdma_query_pkey),
};
/**
diff --git a/examples/vhost_user_rdma/vhost_rdma_ib.h b/examples/vhost_user_rdma/vhost_rdma_ib.h
index 79575e735c..5a1787fabe 100644
--- a/examples/vhost_user_rdma/vhost_rdma_ib.h
+++ b/examples/vhost_user_rdma/vhost_rdma_ib.h
@@ -957,6 +957,10 @@ struct vhost_rdma_cmd_destroy_qp {
uint32_t qpn;
};
+struct vhost_rdma_cmd_query_pkey{
+ uint16_t pkey;
+};
+
/**
* @brief Convert IB MTU enum to byte size
* @param mtu The MTU enum value
--
2.43.0
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