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bf80e5d425
+ Define the generic netlink family commands and message attributes to communicate with the userspace daemon + The register and unregister commands are sent when connecting or disconnecting a tree. The witness registration keeps a pointer to the tcon and has the same lifetime. + Each registration has an id allocated by an IDR. This id is sent to the userspace daemon in the register command, and will be included in the notification messages from the userspace daemon to retrieve from the IDR the matching registration. + The authentication information is bundled in the register message. If kerberos is used the message just carries a flag. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Netlink routines for CIFS
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*
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* Copyright (c) 2020 Samuel Cabrero <scabrero@suse.de>
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*/
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#include <net/genetlink.h>
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#include <uapi/linux/cifs/cifs_netlink.h>
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#include "netlink.h"
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#include "cifsglob.h"
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#include "cifs_debug.h"
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static const struct nla_policy cifs_genl_policy[CIFS_GENL_ATTR_MAX + 1] = {
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[CIFS_GENL_ATTR_SWN_REGISTRATION_ID] = { .type = NLA_U32 },
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[CIFS_GENL_ATTR_SWN_NET_NAME] = { .type = NLA_STRING },
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[CIFS_GENL_ATTR_SWN_SHARE_NAME] = { .type = NLA_STRING },
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[CIFS_GENL_ATTR_SWN_IP] = { .len = sizeof(struct sockaddr_storage) },
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[CIFS_GENL_ATTR_SWN_NET_NAME_NOTIFY] = { .type = NLA_FLAG },
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[CIFS_GENL_ATTR_SWN_SHARE_NAME_NOTIFY] = { .type = NLA_FLAG },
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[CIFS_GENL_ATTR_SWN_IP_NOTIFY] = { .type = NLA_FLAG },
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[CIFS_GENL_ATTR_SWN_KRB_AUTH] = { .type = NLA_FLAG },
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[CIFS_GENL_ATTR_SWN_USER_NAME] = { .type = NLA_STRING },
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[CIFS_GENL_ATTR_SWN_PASSWORD] = { .type = NLA_STRING },
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[CIFS_GENL_ATTR_SWN_DOMAIN_NAME] = { .type = NLA_STRING },
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};
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static struct genl_ops cifs_genl_ops[] = {
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};
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static const struct genl_multicast_group cifs_genl_mcgrps[] = {
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[CIFS_GENL_MCGRP_SWN] = { .name = CIFS_GENL_MCGRP_SWN_NAME },
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};
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struct genl_family cifs_genl_family = {
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.name = CIFS_GENL_NAME,
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.version = CIFS_GENL_VERSION,
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.hdrsize = 0,
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.maxattr = CIFS_GENL_ATTR_MAX,
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.module = THIS_MODULE,
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.policy = cifs_genl_policy,
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.ops = cifs_genl_ops,
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.n_ops = ARRAY_SIZE(cifs_genl_ops),
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.mcgrps = cifs_genl_mcgrps,
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.n_mcgrps = ARRAY_SIZE(cifs_genl_mcgrps),
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};
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/**
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* cifs_genl_init - Register generic netlink family
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*
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* Return zero if initialized successfully, otherwise non-zero.
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*/
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int cifs_genl_init(void)
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{
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int ret;
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ret = genl_register_family(&cifs_genl_family);
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if (ret < 0) {
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cifs_dbg(VFS, "%s: failed to register netlink family\n",
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__func__);
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return ret;
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}
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return 0;
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}
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/**
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* cifs_genl_exit - Unregister generic netlink family
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*/
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void cifs_genl_exit(void)
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{
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int ret;
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ret = genl_unregister_family(&cifs_genl_family);
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if (ret < 0) {
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cifs_dbg(VFS, "%s: failed to unregister netlink family\n",
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__func__);
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}
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}
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