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Date: Mon, 10 Jul 2017 10:01:02 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Leon Romanovsky <leon@...nel.org>
Cc: Stephen Hemminger <stephen@...workplumber.org>,
Doug Ledford <dledford@...hat.com>,
Ariel Almog <ariela@...lanox.com>,
Linux RDMA <linux-rdma@...r.kernel.org>,
Linux Netdev <netdev@...r.kernel.org>,
Leon Romanovsky <leonro@...lanox.com>
Subject: Re: [PATCH iproute2 V3 2/4] rdma: Add dev object
Tue, Jul 04, 2017 at 09:55:39AM CEST, leon@...nel.org wrote:
>From: Leon Romanovsky <leonro@...lanox.com>
>
>Device (dev) object represents struct ib_device to the user space.
>
>Device properties:
> * Device capabilities
> * FW version to the device output
> * node_guid and sys_image_guid
> * node_type
>
>Signed-off-by: Leon Romanovsky <leonro@...lanox.com>
>---
> rdma/Makefile | 2 +-
> rdma/dev.c | 235 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> rdma/rdma.c | 3 +-
> rdma/rdma.h | 12 ++-
> rdma/utils.c | 46 +++++++++++-
> 5 files changed, 293 insertions(+), 5 deletions(-)
> create mode 100644 rdma/dev.c
>
>diff --git a/rdma/Makefile b/rdma/Makefile
>index 64da2142..123d7ac5 100644
>--- a/rdma/Makefile
>+++ b/rdma/Makefile
>@@ -2,7 +2,7 @@ include ../Config
>
> ifeq ($(HAVE_MNL),y)
>
>-RDMA_OBJ = rdma.o utils.o
>+RDMA_OBJ = rdma.o utils.o dev.o
>
> TARGETS=rdma
> CFLAGS += $(shell $(PKG_CONFIG) libmnl --cflags)
>diff --git a/rdma/dev.c b/rdma/dev.c
>new file mode 100644
>index 00000000..b80e5288
>--- /dev/null
>+++ b/rdma/dev.c
>@@ -0,0 +1,235 @@
>+/*
>+ * dev.c RDMA tool
>+ *
>+ * This program is free software; you can redistribute it and/or
>+ * modify it under the terms of the GNU General Public License
>+ * as published by the Free Software Foundation; either version
>+ * 2 of the License, or (at your option) any later version.
>+ *
>+ * Authors: Leon Romanovsky <leonro@...lanox.com>
>+ */
>+
>+#include "rdma.h"
>+
>+static int dev_help(struct rdma *rd)
>+{
>+ pr_out("Usage: %s dev show [DEV]\n", rd->filename);
>+ return 0;
>+}
>+
>+static void dev_print_caps(struct nlattr **tb)
>+{
>+ uint64_t caps;
>+ uint32_t idx;
>+
>+ /*
>+ * FIXME: move to indexes when kernel will start exporting them.
>+ */
>+ static const char *dev_caps[64] = {
static const char *dev_caps[] = {
>+ "RESIZE_MAX_WR",
>+ "BAD_PKEY_CNTR",
>+ "BAD_QKEY_CNTR",
>+ "RAW_MULTI",
>+ "AUTO_PATH_MIG",
>+ "CHANGE_PHY_PORT",
>+ "UD_AV_PORT_ENFORCE",
>+ "CURR_QP_STATE_MOD",
>+ "SHUTDOWN_PORT",
>+ "INIT_TYPE",
>+ "PORT_ACTIVE_EVENT",
>+ "SYS_IMAGE_GUID",
>+ "RC_RNR_NAK_GEN",
>+ "SRQ_RESIZE",
>+ "N_NOTIFY_CQ",
>+ "LOCAL_DMA_LKEY",
>+ "RESERVED",
>+ "MEM_WINDOW",
>+ "UD_IP_CSUM",
>+ "UD_TSO",
>+ "XRC",
>+ "MEM_MGT_EXTENSIONS",
>+ "BLOCK_MULTICAST_LOOPBACK",
>+ "MEM_WINDOW_TYPE_2A",
>+ "MEM_WINDOW_TYPE_2B",
>+ "RC_IP_CSUM",
>+ "RAW_IP_CSUM",
>+ "CROSS_CHANNEL",
>+ "MANAGED_FLOW_STEERING",
>+ "SIGNATURE_HANDOVER",
>+ "ON_DEMAND_PAGING",
>+ "SG_GAPS_REG",
>+ "VIRTUAL_FUNCTION",
>+ "RAW_SCATTER_FCS",
>+ "RDMA_NETDEV_OPA_VNIC",
>+ };
>+
>+ if (!tb[RDMA_NLDEV_ATTR_CAP_FLAGS])
>+ return;
>+
>+ caps = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_CAP_FLAGS]);
>+
>+ pr_out("\n caps: <");
>+ for (idx = 0; idx < 64; idx++) {
>+ if (caps & 0x1) {
>+ pr_out("%s", dev_caps[idx]?dev_caps[idx]:"UNKNONW");
>+ if (caps >> 0x1)
>+ pr_out(", ");
>+ }
>+ caps >>= 0x1;
>+ }
>+
>+ pr_out(">");
>+}
>+
>+static void dev_print_fw(struct nlattr **tb)
>+{
>+ if (!tb[RDMA_NLDEV_ATTR_FW_VERSION])
>+ return;
>+
>+ pr_out("fw %s ",
>+ mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_FW_VERSION]));
>+}
>+
>+static void _dev_print_be64(char *name, uint64_t val)
Why the initial "_"? I think it could be avoided.
Wait, I'm confused. Does kernel actually exposes BE64 in U64 attribute?
That is wrong. Please fix it while there is still a time (if it is).
>+{
>+ uint16_t vp[4];
>+
>+ memcpy(vp, &val, sizeof(uint64_t));
>+ pr_out("%s %04x:%04x:%04x:%04x ", name, vp[3], vp[2], vp[1], vp[0]);
>+}
>+
>+static void dev_print_node_guid(struct nlattr **tb)
>+{
>+ uint64_t node_guid;
>+
>+ if (!tb[RDMA_NLDEV_ATTR_NODE_GUID])
>+ return;
>+
>+ node_guid = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_NODE_GUID]);
>+ _dev_print_be64("node_guid", node_guid);
>+}
>+
>+static void dev_print_sys_image_guid(struct nlattr **tb)
>+{
>+ uint64_t sys_image_guid;
>+
>+ if (!tb[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID])
>+ return;
>+
>+ sys_image_guid = mnl_attr_get_u64(tb[RDMA_NLDEV_ATTR_SYS_IMAGE_GUID]);
>+ _dev_print_be64("sys_image_guid", sys_image_guid);
>+}
>+
>+static void dev_print_node_type(struct nlattr **tb)
>+{
>+ uint8_t node_type;
>+ /*
>+ * FIXME: move to index exported by the kernel
>+ */
So fix it rightaway :)
>+ static const char *str[] = {
>+ "UNKNOWN",
>+ "SWITCH",
>+ "ROUTER",
>+ "RNIC",
>+ "USNIC",
>+ "USNIC_UDP",
>+ };
>+
>+ if (!tb[RDMA_NLDEV_ATTR_DEV_NODE_TYPE])
>+ return;
>+
>+ node_type = mnl_attr_get_u8(tb[RDMA_NLDEV_ATTR_DEV_NODE_TYPE]);
>+
>+ if (node_type < 7 )
Magic? :O
>+ pr_out("node_type %s ", str[node_type]);
>+ else
>+ pr_out("node_type UNKNOWN ");
>+}
>+
>+static int dev_parse_cb(const struct nlmsghdr *nlh, void *data)
>+{
>+ struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
>+ struct rdma *rd = data;
>+
>+ mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
>+ if (!tb[RDMA_NLDEV_ATTR_DEV_INDEX] || !tb[RDMA_NLDEV_ATTR_DEV_NAME])
>+ return MNL_CB_ERROR;
>+
>+ pr_out("%u: %s: ",
>+ mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]),
>+ mnl_attr_get_str(tb[RDMA_NLDEV_ATTR_DEV_NAME]));
>+ dev_print_node_type(tb);
>+ dev_print_fw(tb);
>+ dev_print_node_guid(tb);
>+ dev_print_sys_image_guid(tb);
>+ if (rd->show_details)
>+ dev_print_caps(tb);
>+
>+ pr_out("\n");
>+ return MNL_CB_OK;
>+}
>+
>+
>+static int dev_no_args(struct rdma *rd)
>+{
>+ uint32_t seq;
>+ int ret;
>+
>+ rdma_prepare_msg(rd, RDMA_NLDEV_CMD_GET, &seq, (NLM_F_REQUEST | NLM_F_ACK));
>+ mnl_attr_put_u32(rd->nlh, RDMA_NLDEV_ATTR_DEV_INDEX, rd->dev_idx);
>+ if ((ret = rdma_send_msg(rd)))
>+ return ret;
>+
>+ return rdma_recv_msg(rd, dev_parse_cb, rd, seq);
>+}
>+
>+static int dev_one_show(struct rdma *rd)
>+{
>+ const struct rdma_cmd cmds[] = {
>+ { NULL, dev_no_args},
>+ { 0 }
>+ };
>+
>+ return rdma_exec_cmd(rd, cmds, "parameter");
>+
Drop the extra empty line.
>+}
>+
>+static int dev_show(struct rdma *rd)
>+{
>+ struct dev_map *dev_map;
>+ int ret = 0;
>+
>+ if (rd_no_arg(rd)) {
>+ list_for_each_entry(dev_map, &rd->dev_map_list, list) {
>+ rd->dev_idx = dev_map->idx;
>+ ret = dev_one_show(rd);
>+ if (ret)
>+ return ret;
>+ }
>+
Drop the extra empty line.
>+ }
>+ else {
"} else {"
Checkpatch should warn you. Did you run it?
>+ dev_map = dev_map_lookup(rd, false);
>+ if (!dev_map) {
>+ pr_err("Wrong device name\n");
>+ return -ENOENT;
>+ }
>+ rd_arg_inc(rd);
>+ rd->dev_idx = dev_map->idx;
>+ ret = dev_one_show(rd);
>+ }
>+ return ret;
>+}
>+
>+int cmd_dev(struct rdma *rd)
>+{
>+ const struct rdma_cmd cmds[] = {
>+ { NULL, dev_show },
>+ { "show", dev_show },
>+ { "list", dev_show },
>+ { "help", dev_help },
>+ { 0 }
>+ };
>+
>+ return rdma_exec_cmd(rd, cmds, "dev command");
>+}
>diff --git a/rdma/rdma.c b/rdma/rdma.c
>index 29273839..dfebd71e 100644
>--- a/rdma/rdma.c
>+++ b/rdma/rdma.c
>@@ -18,7 +18,7 @@
> static void help(char *name)
> {
> pr_out("Usage: %s [ OPTIONS ] OBJECT { COMMAND | help }\n"
>- "where OBJECT := { help }\n"
>+ "where OBJECT := { dev | help }\n"
> " OPTIONS := { -V[ersion] | -d[etails]}\n", name);
> }
>
>@@ -33,6 +33,7 @@ static int rd_cmd(struct rdma *rd)
> const struct rdma_cmd cmds[] = {
> { NULL, cmd_help },
> { "help", cmd_help },
>+ { "dev", cmd_dev },
> { 0 }
> };
>
>diff --git a/rdma/rdma.h b/rdma/rdma.h
>index 0c01b091..2856e592 100644
>--- a/rdma/rdma.h
>+++ b/rdma/rdma.h
>@@ -16,7 +16,6 @@
> #include <errno.h>
> #include <getopt.h>
> #include <libmnl/libmnl.h>
>-
:) Please push this line removal to the previous patch.
> #include <rdma/rdma_netlink.h>
> #include "list.h"
>
>@@ -36,6 +35,8 @@ struct rdma {
> char *filename;
> bool show_details;
> struct list_head dev_map_list;
>+ uint32_t dev_idx;
>+ uint32_t port_idx;
> struct mnl_socket *nl;
> struct nlmsghdr *nlh;
> char *buff;
>@@ -51,13 +52,22 @@ struct rdma_cmd {
> */
> bool rd_no_arg(struct rdma *rd);
> void rd_arg_inc(struct rdma *rd);
>+char *rd_argv(struct rdma *rd);
>+uint32_t get_port_from_argv(struct rdma *rd);
>
>+/*
>+ * Commands interface
>+ */
>+int cmd_dev(struct rdma *rd);
>+int cmd_link(struct rdma *rd);
> int rdma_exec_cmd(struct rdma *rd, const struct rdma_cmd *c, const char *str);
>
> /*
> * Device manipulation
> */
> void rdma_free_devmap(struct rdma *rd);
>+struct dev_map *dev_map_lookup(struct rdma *rd, bool allow_port_index);
>+struct dev_map *_dev_map_lookup(struct rdma *rd, const char *dev_name);
>
> /*
> * Netlink
>diff --git a/rdma/utils.c b/rdma/utils.c
>index b554eff7..bee490da 100644
>--- a/rdma/utils.c
>+++ b/rdma/utils.c
>@@ -21,7 +21,7 @@ static int rd_argc(struct rdma *rd)
> return rd->argc;
> }
>
>-static char *rd_argv(struct rdma *rd)
>+char *rd_argv(struct rdma *rd)
> {
> if (!rd_argc(rd))
> return NULL;
>@@ -55,6 +55,15 @@ bool rd_no_arg(struct rdma *rd)
> return rd_argc(rd) == 0;
> }
>
>+uint32_t get_port_from_argv(struct rdma *rd)
>+{
>+ char *slash;
>+
>+ slash = strchr(rd_argv(rd), '/');
>+ /* if no port found, return 0 */
>+ return (slash) ? (atoi(slash + 1)):0;
return slash ? atoi(slash + 1) : 0;
>+}
>+
> static struct dev_map *dev_map_alloc(const char *dev_name)
> {
> struct dev_map *dev_map;
>@@ -88,8 +97,14 @@ static void dev_map_cleanup(struct rdma *rd)
> }
>
> static const enum mnl_attr_data_type nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
>+ [RDMA_NLDEV_ATTR_DEV_INDEX] = MNL_TYPE_U32,
> [RDMA_NLDEV_ATTR_DEV_NAME] = MNL_TYPE_NUL_STRING,
> [RDMA_NLDEV_ATTR_PORT_INDEX] = MNL_TYPE_U32,
>+ [RDMA_NLDEV_ATTR_CAP_FLAGS] = MNL_TYPE_U64,
>+ [RDMA_NLDEV_ATTR_FW_VERSION] = MNL_TYPE_NUL_STRING,
>+ [RDMA_NLDEV_ATTR_NODE_GUID] = MNL_TYPE_U64,
>+ [RDMA_NLDEV_ATTR_SYS_IMAGE_GUID] = MNL_TYPE_U64,
>+ [RDMA_NLDEV_ATTR_DEV_NODE_TYPE] = MNL_TYPE_U8,
> };
>
> int rd_attr_cb(const struct nlattr *attr, void *data)
>@@ -134,7 +149,6 @@ int rd_dev_init_cb(const struct nlmsghdr *nlh, void *data)
>
> dev_map->num_ports = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_PORT_INDEX]);
> dev_map->idx = mnl_attr_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
>-
Again, should be part of the previous patch.
> return MNL_CB_OK;
> }
>
>@@ -221,3 +235,31 @@ int rdma_recv_msg(struct rdma *rd, mnl_cb_t callback, void *data, unsigned int s
> mnl_socket_close(rd->nl);
> return ret;
> }
>+
>+struct dev_map *_dev_map_lookup(struct rdma *rd, const char *dev_name)
>+{
>+ struct dev_map *dev_map;
>+
>+ list_for_each_entry(dev_map, &rd->dev_map_list, list)
>+ if (strcmp(dev_name, dev_map->dev_name) == 0)
>+ return dev_map;
>+
>+ return NULL;
>+}
>+struct dev_map *dev_map_lookup(struct rdma *rd, bool allow_port_index)
>+{
>+ struct dev_map *dev_map;
>+ char *dev_name;
>+ char *slash;
>+
>+ dev_name = strdup(rd_argv(rd));
>+ if (allow_port_index) {
>+ slash = strrchr(dev_name, '/');
>+ if (slash)
>+ *slash = '\0';
>+ }
>+
>+ dev_map = _dev_map_lookup(rd, dev_name);
>+ free(dev_name);
>+ return dev_map;
>+}
>--
>2.13.2
>
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