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Date: Wed, 1 Jun 2022 15:10:21 +0300
From: Eli Cohen <elic@...dia.com>
To: <dsahern@...nel.org>, <netdev@...r.kernel.org>,
<virtualization@...ts.linux-foundation.org>, <jasowang@...hat.com>,
<si-wei.liu@...cle.com>, <mst@...hat.com>
CC: Eli Cohen <elic@...dia.com>
Subject: [PATCH] vdpa: Add support for reading vdpa device statistics
Read statistics of a vdpa device. The specific data is a received as a
pair of attribute name and attribute value.
Examples:
1. Read statistics for the virtqueue at index 1
$ vdpa dev vstats show vdpa-a qidx 1
vdpa-a:
vdpa-a: queue_type tx received_desc 321812 completed_desc 321812
2. Read statistics for the virtqueue at index 16
$ vdpa dev vstats show vdpa-a qidx 16
vdpa-a: queue_type control_vq received_desc 17 completed_desc 17
3. Read statisitics for the virtqueue at index 0 with json output
$ vdpa -j dev vstats show vdpa-a qidx 0
{"vstats":{"vdpa-a":{"queue_type":"rx","received_desc":114855,"completed_desc":114617}}}
4. Read statistics for the virtqueue at index 0 with preety json
output
$ vdpa -jp dev vstats show vdpa-a qidx 0
vdpa -jp dev vstats show vdpa-a qidx 0
{
"vstats": {
"vdpa-a": {
"queue_type": "rx",
"received_desc": 114855,
"completed_desc": 114617
}
}
}
Signed-off-by: Eli Cohen <elic@...dia.com>
---
vdpa/include/uapi/linux/vdpa.h | 6 ++
vdpa/vdpa.c | 156 +++++++++++++++++++++++++++++++++
2 files changed, 162 insertions(+)
diff --git a/vdpa/include/uapi/linux/vdpa.h b/vdpa/include/uapi/linux/vdpa.h
index cc575a825a7c..7f52e703f1ad 100644
--- a/vdpa/include/uapi/linux/vdpa.h
+++ b/vdpa/include/uapi/linux/vdpa.h
@@ -18,6 +18,7 @@ enum vdpa_command {
VDPA_CMD_DEV_DEL,
VDPA_CMD_DEV_GET, /* can dump */
VDPA_CMD_DEV_CONFIG_GET, /* can dump */
+ VDPA_CMD_DEV_STATS_GET,
};
enum vdpa_attr {
@@ -46,6 +47,11 @@ enum vdpa_attr {
VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */
VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u32 */
VDPA_ATTR_DEV_SUPPORTED_FEATURES, /* u64 */
+
+ VDPA_ATTR_DEV_QUEUE_INDEX, /* u32 */
+ VDPA_ATTR_DEV_VENDOR_ATTR_NAME, /* string */
+ VDPA_ATTR_DEV_VENDOR_ATTR_VALUE, /* u64 */
+
/* new attributes must be added above here */
VDPA_ATTR_MAX,
};
diff --git a/vdpa/vdpa.c b/vdpa/vdpa.c
index 3ae1b78f4cac..3ca3095ed783 100644
--- a/vdpa/vdpa.c
+++ b/vdpa/vdpa.c
@@ -26,6 +26,7 @@
#define VDPA_OPT_VDEV_MAC BIT(4)
#define VDPA_OPT_VDEV_MTU BIT(5)
#define VDPA_OPT_MAX_VQP BIT(6)
+#define VDPA_OPT_QUEUE_INDEX BIT(7)
struct vdpa_opts {
uint64_t present; /* flags of present items */
@@ -36,6 +37,7 @@ struct vdpa_opts {
char mac[ETH_ALEN];
uint16_t mtu;
uint16_t max_vqp;
+ uint32_t queue_idx;
};
struct vdpa {
@@ -174,6 +176,17 @@ static int vdpa_argv_u16(struct vdpa *vdpa, int argc, char **argv,
return get_u16(result, *argv, 10);
}
+static int vdpa_argv_u32(struct vdpa *vdpa, int argc, char **argv,
+ uint32_t *result)
+{
+ if (argc <= 0 || !*argv) {
+ fprintf(stderr, "number expected\n");
+ return -EINVAL;
+ }
+
+ return get_u32(result, *argv, 10);
+}
+
struct vdpa_args_metadata {
uint64_t o_flag;
const char *err_msg;
@@ -183,6 +196,7 @@ static const struct vdpa_args_metadata vdpa_args_required[] = {
{VDPA_OPT_VDEV_MGMTDEV_HANDLE, "management device handle not set."},
{VDPA_OPT_VDEV_NAME, "device name is not set."},
{VDPA_OPT_VDEV_HANDLE, "device name is not set."},
+ {VDPA_OPT_QUEUE_INDEX, "queue index is not set."},
};
static int vdpa_args_finding_required_validate(uint64_t o_required,
@@ -228,6 +242,8 @@ static void vdpa_opts_put(struct nlmsghdr *nlh, struct vdpa *vdpa)
mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MTU, opts->mtu);
if (opts->present & VDPA_OPT_MAX_VQP)
mnl_attr_put_u16(nlh, VDPA_ATTR_DEV_NET_CFG_MAX_VQP, opts->max_vqp);
+ if (opts->present & VDPA_OPT_QUEUE_INDEX)
+ mnl_attr_put_u32(nlh, VDPA_ATTR_DEV_QUEUE_INDEX, opts->queue_idx);
}
static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
@@ -304,6 +320,14 @@ static int vdpa_argv_parse(struct vdpa *vdpa, int argc, char **argv,
NEXT_ARG_FWD();
o_found |= VDPA_OPT_MAX_VQP;
+ } else if ((matches(*argv, "qidx") == 0) && (o_optional & VDPA_OPT_QUEUE_INDEX)) {
+ NEXT_ARG_FWD();
+ err = vdpa_argv_u32(vdpa, argc, argv, &opts->queue_idx);
+ if (err)
+ return err;
+
+ NEXT_ARG_FWD();
+ o_found |= VDPA_OPT_QUEUE_INDEX;
} else {
fprintf(stderr, "Unknown option \"%s\"\n", *argv);
return -EINVAL;
@@ -594,6 +618,7 @@ static void cmd_dev_help(void)
fprintf(stderr, " [ max_vqp MAX_VQ_PAIRS ]\n");
fprintf(stderr, " vdpa dev del DEV\n");
fprintf(stderr, "Usage: vdpa dev config COMMAND [ OPTIONS ]\n");
+ fprintf(stderr, "Usage: vdpa dev vstats COMMAND\n");
}
static const char *device_type_name(uint32_t type)
@@ -819,6 +844,135 @@ static int cmd_dev_config(struct vdpa *vdpa, int argc, char **argv)
return -ENOENT;
}
+#define MAX_KEY_LEN 200
+/* 5 bytes for format */
+#define MAX_FMT_LEN (MAX_KEY_LEN + 5 + 1)
+
+static void pr_out_dev_net_vstats(const struct nlmsghdr *nlh)
+{
+ const char *name = NULL;
+ uint64_t features = 0;
+ char fmt[MAX_FMT_LEN];
+ uint16_t max_vqp = 0;
+ bool is_ctrl = false;
+ struct nlattr *attr;
+ uint16_t qidx = 0;
+ uint64_t v64;
+
+ mnl_attr_for_each(attr, nlh, sizeof(struct genlmsghdr)) {
+ switch (attr->nla_type) {
+ case VDPA_ATTR_DEV_NET_CFG_MAX_VQP:
+ max_vqp = mnl_attr_get_u16(attr);
+ break;
+ case VDPA_ATTR_DEV_NEGOTIATED_FEATURES:
+ features = mnl_attr_get_u64(attr);
+ break;
+ case VDPA_ATTR_DEV_QUEUE_INDEX:
+ qidx = mnl_attr_get_u16(attr);
+ is_ctrl = features & BIT(VIRTIO_NET_F_CTRL_VQ) && qidx == 2 * max_vqp;
+ if (!is_ctrl) {
+ if (qidx & 1)
+ print_string(PRINT_ANY, "queue_type", "queue_type %s ",
+ "tx");
+ else
+ print_string(PRINT_ANY, "queue_type", "queue_type %s ",
+ "rx");
+ } else {
+ print_string(PRINT_ANY, "queue_type", "queue_type %s ",
+ "control_vq");
+ }
+ break;
+ case VDPA_ATTR_DEV_VENDOR_ATTR_NAME:
+ name = mnl_attr_get_str(attr);
+ if (strlen(name) > MAX_KEY_LEN)
+ return;
+
+ strcpy(fmt, name);
+ strcat(fmt, " %lu ");
+ break;
+ case VDPA_ATTR_DEV_VENDOR_ATTR_VALUE:
+ v64 = mnl_attr_get_u64(attr);
+ print_u64(PRINT_ANY, name, fmt, v64);
+ break;
+ }
+ }
+}
+
+static void pr_out_dev_vstats(struct vdpa *vdpa, struct nlattr **tb, const struct nlmsghdr *nlh)
+{
+ uint32_t device_id = mnl_attr_get_u32(tb[VDPA_ATTR_DEV_ID]);
+
+ pr_out_vdev_handle_start(vdpa, tb);
+ switch (device_id) {
+ case VIRTIO_ID_NET:
+ pr_out_dev_net_vstats(nlh);
+ break;
+ default:
+ break;
+ }
+ pr_out_vdev_handle_end(vdpa);
+}
+
+static int cmd_dev_vstats_show_cb(const struct nlmsghdr *nlh, void *data)
+{
+ struct genlmsghdr *genl = mnl_nlmsg_get_payload(nlh);
+ struct nlattr *tb[VDPA_ATTR_MAX + 1] = {};
+ struct vdpa *vdpa = data;
+
+ mnl_attr_parse(nlh, sizeof(*genl), attr_cb, tb);
+ if (!tb[VDPA_ATTR_DEV_NAME] || !tb[VDPA_ATTR_DEV_ID])
+ return MNL_CB_ERROR;
+ pr_out_dev_vstats(vdpa, tb, nlh);
+ return MNL_CB_OK;
+}
+
+static void cmd_dev_vstats_help(void)
+{
+ fprintf(stderr, "Usage: vdpa dev vstats show DEV [qidx QUEUE_INDEX]\n");
+}
+
+static int cmd_dev_vstats_show(struct vdpa *vdpa, int argc, char **argv)
+{
+ uint16_t flags = NLM_F_REQUEST | NLM_F_ACK;
+ struct nlmsghdr *nlh;
+ int err;
+
+ if (argc != 1 && argc != 3) {
+ cmd_dev_vstats_help();
+ return -EINVAL;
+ }
+
+ nlh = mnlu_gen_socket_cmd_prepare(&vdpa->nlg, VDPA_CMD_DEV_STATS_GET,
+ flags);
+
+ err = vdpa_argv_parse_put(nlh, vdpa, argc, argv,
+ VDPA_OPT_VDEV_HANDLE, VDPA_OPT_QUEUE_INDEX);
+ if (err)
+ return err;
+
+ pr_out_section_start(vdpa, "vstats");
+ err = mnlu_gen_socket_sndrcv(&vdpa->nlg, nlh, cmd_dev_vstats_show_cb, vdpa);
+ pr_out_section_end(vdpa);
+ return 0;
+}
+
+static int cmd_dev_vstats(struct vdpa *vdpa, int argc, char **argv)
+{
+ if (argc < 1) {
+ cmd_dev_vstats_help();
+ return -EINVAL;
+ }
+
+ if (matches(*argv, "help") == 0) {
+ cmd_dev_vstats_help();
+ return 0;
+ } else if (matches(*argv, "show") == 0) {
+ return cmd_dev_vstats_show(vdpa, argc - 1, argv + 1);
+ }
+ fprintf(stderr, "Command \"%s\" not found\n", *argv);
+ return -ENOENT;
+}
+
static int cmd_dev(struct vdpa *vdpa, int argc, char **argv)
{
if (!argc)
@@ -836,6 +990,8 @@ static int cmd_dev(struct vdpa *vdpa, int argc, char **argv)
return cmd_dev_del(vdpa, argc - 1, argv + 1);
} else if (matches(*argv, "config") == 0) {
return cmd_dev_config(vdpa, argc - 1, argv + 1);
+ } else if (matches(*argv, "vstats") == 0) {
+ return cmd_dev_vstats(vdpa, argc - 1, argv + 1);
}
fprintf(stderr, "Command \"%s\" not found\n", *argv);
return -ENOENT;
--
2.35.1
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