Blame rdma/sys.c

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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/*
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 * sys.c	RDMA tool
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 */
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#include "rdma.h"
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static int sys_help(struct rd *rd)
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{
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	pr_out("Usage: %s system show [ netns ]\n", rd->filename);
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	pr_out("       %s system set netns { shared | exclusive }\n", rd->filename);
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	return 0;
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}
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static const char *netns_modes_str[] = {
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	"exclusive",
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	"shared",
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};
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static int sys_show_parse_cb(const struct nlmsghdr *nlh, void *data)
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{
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	struct nlattr *tb[RDMA_NLDEV_ATTR_MAX] = {};
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	mnl_attr_parse(nlh, 0, rd_attr_cb, tb);
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	if (tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE]) {
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		const char *mode_str;
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		uint8_t netns_mode;
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		netns_mode =
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			mnl_attr_get_u8(tb[RDMA_NLDEV_SYS_ATTR_NETNS_MODE]);
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		if (netns_mode < ARRAY_SIZE(netns_modes_str))
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			mode_str = netns_modes_str[netns_mode];
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		else
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			mode_str = "unknown";
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		print_color_string(PRINT_ANY, COLOR_NONE, "netns", "netns %s\n",
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				   mode_str);
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	}
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	return MNL_CB_OK;
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}
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static int sys_show_no_args(struct rd *rd)
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{
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	uint32_t seq;
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	int ret;
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	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SYS_GET,
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		       &seq, (NLM_F_REQUEST | NLM_F_ACK));
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	ret = rd_send_msg(rd);
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	if (ret)
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		return ret;
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	return rd_recv_msg(rd, sys_show_parse_cb, rd, seq);
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}
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static int sys_show(struct rd *rd)
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{
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	const struct rd_cmd cmds[] = {
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		{ NULL,		sys_show_no_args},
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		{ "netns",	sys_show_no_args},
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		{ 0 }
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	};
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	return rd_exec_cmd(rd, cmds, "parameter");
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}
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static int sys_set_netns_cmd(struct rd *rd, bool enable)
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{
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	uint32_t seq;
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	rd_prepare_msg(rd, RDMA_NLDEV_CMD_SYS_SET,
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		       &seq, (NLM_F_REQUEST | NLM_F_ACK));
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	mnl_attr_put_u8(rd->nlh, RDMA_NLDEV_SYS_ATTR_NETNS_MODE, enable);
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	return rd_sendrecv_msg(rd, seq);
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}
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static bool sys_valid_netns_cmd(const char *cmd)
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{
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	int i;
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	for (i = 0; i < ARRAY_SIZE(netns_modes_str); i++) {
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		if (!strcmp(cmd, netns_modes_str[i]))
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			return true;
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	}
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	return false;
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}
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static int sys_set_netns_args(struct rd *rd)
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{
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	bool cmd;
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	if (rd_no_arg(rd) || !sys_valid_netns_cmd(rd_argv(rd))) {
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		pr_err("valid options are: { shared | exclusive }\n");
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		return -EINVAL;
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	}
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	cmd = (strcmp(rd_argv(rd), "shared") == 0) ? true : false;
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	return sys_set_netns_cmd(rd, cmd);
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}
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static int sys_set_help(struct rd *rd)
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{
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	pr_out("Usage: %s system set [PARAM] value\n", rd->filename);
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	pr_out("            system set netns { shared | exclusive }\n");
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	return 0;
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}
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static int sys_set(struct rd *rd)
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{
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	const struct rd_cmd cmds[] = {
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		{ NULL,			sys_set_help },
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		{ "help",		sys_set_help },
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		{ "netns",		sys_set_netns_args},
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		{ 0 }
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	};
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	return rd_exec_cmd(rd, cmds, "parameter");
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}
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int cmd_sys(struct rd *rd)
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{
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	const struct rd_cmd cmds[] = {
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		{ NULL,		sys_show },
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		{ "show",	sys_show },
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		{ "set",	sys_set },
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		{ "help",	sys_help },
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		{ 0 }
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	};
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	return rd_exec_cmd(rd, cmds, "system command");
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}