mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
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* zdev - Modify and display the persistent configuration of devices
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*
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* Copyright IBM Corp. 2016, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <ctype.h>
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#include <stdbool.h>
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#include <string.h>
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#include "devnode.h"
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#include "misc.h"
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#include "net.h"
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#include "path.h"
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struct add_linked_cb_data {
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struct util_list *list;
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const char *prefix;
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size_t prefix_len;
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bool result;
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};
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/* Add a devnode to data->list for each sysfs link that indicates a linked
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* device. */
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static exit_code_t add_linked_cb(const char *abs_path, const char *rel_path,
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void *data)
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{
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struct add_linked_cb_data *cb_data = data;
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const char *name;
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struct devnode *d;
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if (starts_with(rel_path, cb_data->prefix)) {
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name = rel_path + cb_data->prefix_len;
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d = devnode_new(NETDEV, 0, 0, name);
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ptrlist_add(cb_data->list, d);
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cb_data->result = true;
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}
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return EXIT_OK;
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}
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/* Add devnodes for all networking devices that are linked to @devnode via
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* a link starting with @prefix to @list. */
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static bool add_devnodes_from_link(struct util_list *list,
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struct devnode *devnode, const char *prefix)
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{
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struct add_linked_cb_data cb_data;
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char *path;
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cb_data.list = list;
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cb_data.prefix = prefix;
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cb_data.prefix_len = strlen(prefix);
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cb_data.result = false;
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path = path_get_sys_class("net", devnode->name);
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path_for_each(path, add_linked_cb, &cb_data);
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free(path);
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return cb_data.result;
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}
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/* Add devnodes for all devices to @list that are linked as "lower" devices
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* of network interface @devnode. */
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bool net_add_linked_devnodes(struct util_list *list, struct devnode *devnode)
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{
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return add_devnodes_from_link(list, devnode, "lower_");
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}
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#define DEVICE_PREFIX "Device:"
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/* If @devnode refers to a vlan device, add a devnode representing its
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* base device to @list. */
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bool net_add_vlan_base(struct util_list *list, struct devnode *devnode)
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{
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char *path, *text, *name, *end;
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bool rc = false;
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path = path_get("/proc/net/vlan/%s", devnode->name);
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text = misc_read_text_file(path, 0, err_ignore);
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if (!text)
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goto out;
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name = strstr(text, DEVICE_PREFIX);
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if (!name)
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goto out;
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name += sizeof(DEVICE_PREFIX) - 1;
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for (; *name && isspace(*name); name++) ;
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for (end = name; *end && !isspace(*end); end++) ;
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if (name == end)
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goto out;
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*end = 0;
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ptrlist_add(list, devnode_new(NETDEV, 0, 0, name));
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rc = true;
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out:
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free(text);
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free(path);
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return rc;
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}
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/* If @devnode refers to a bonding device, add a devnode representing its
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* base device to @list. */
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bool net_add_bonding_base(struct util_list *list, struct devnode *devnode)
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{
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return add_devnodes_from_link(list, devnode, "slave_");
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}
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