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Diffstat (limited to 'net/ethtool/netlink.c')
-rw-r--r--net/ethtool/netlink.c126
1 files changed, 89 insertions, 37 deletions
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 5c2072765be7..50d3c8896f91 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -9,12 +9,24 @@ static struct genl_family ethtool_genl_family;
static bool ethnl_ok __read_mostly;
static u32 ethnl_bcast_seq;
-static const struct nla_policy ethnl_header_policy[ETHTOOL_A_HEADER_MAX + 1] = {
- [ETHTOOL_A_HEADER_UNSPEC] = { .type = NLA_REJECT },
+#define ETHTOOL_FLAGS_BASIC (ETHTOOL_FLAG_COMPACT_BITSETS | \
+ ETHTOOL_FLAG_OMIT_REPLY)
+#define ETHTOOL_FLAGS_STATS (ETHTOOL_FLAGS_BASIC | ETHTOOL_FLAG_STATS)
+
+const struct nla_policy ethnl_header_policy[] = {
[ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 },
[ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING,
.len = ALTIFNAMSIZ - 1 },
- [ETHTOOL_A_HEADER_FLAGS] = { .type = NLA_U32 },
+ [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32,
+ ETHTOOL_FLAGS_BASIC),
+};
+
+const struct nla_policy ethnl_header_policy_stats[] = {
+ [ETHTOOL_A_HEADER_DEV_INDEX] = { .type = NLA_U32 },
+ [ETHTOOL_A_HEADER_DEV_NAME] = { .type = NLA_NUL_STRING,
+ .len = ALTIFNAMSIZ - 1 },
+ [ETHTOOL_A_HEADER_FLAGS] = NLA_POLICY_MASK(NLA_U32,
+ ETHTOOL_FLAGS_STATS),
};
/**
@@ -37,7 +49,7 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
const struct nlattr *header, struct net *net,
struct netlink_ext_ack *extack, bool require_dev)
{
- struct nlattr *tb[ETHTOOL_A_HEADER_MAX + 1];
+ struct nlattr *tb[ARRAY_SIZE(ethnl_header_policy)];
const struct nlattr *devname_attr;
struct net_device *dev = NULL;
u32 flags = 0;
@@ -47,19 +59,15 @@ int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
NL_SET_ERR_MSG(extack, "request header missing");
return -EINVAL;
}
- ret = nla_parse_nested(tb, ETHTOOL_A_HEADER_MAX, header,
- ethnl_header_policy, extack);
+ /* No validation here, command policy should have a nested policy set
+ * for the header, therefore validation should have already been done.
+ */
+ ret = nla_parse_nested(tb, ARRAY_SIZE(ethnl_header_policy) - 1, header,
+ NULL, extack);
if (ret < 0)
return ret;
- if (tb[ETHTOOL_A_HEADER_FLAGS]) {
+ if (tb[ETHTOOL_A_HEADER_FLAGS])
flags = nla_get_u32(tb[ETHTOOL_A_HEADER_FLAGS]);
- if (flags & ~ETHTOOL_FLAG_ALL) {
- NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_HEADER_FLAGS],
- "unrecognized request flags");
- nl_set_extack_cookie_u32(extack, ETHTOOL_FLAG_ALL);
- return -EOPNOTSUPP;
- }
- }
devname_attr = tb[ETHTOOL_A_HEADER_DEV_NAME];
if (tb[ETHTOOL_A_HEADER_DEV_INDEX]) {
@@ -247,7 +255,7 @@ static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
/**
* ethnl_default_parse() - Parse request message
* @req_info: pointer to structure to put data into
- * @nlhdr: pointer to request message header
+ * @tb: parsed attributes
* @net: request netns
* @request_ops: struct request_ops for request type
* @extack: netlink extack for error reporting
@@ -259,37 +267,24 @@ static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
* Return: 0 on success or negative error code
*/
static int ethnl_default_parse(struct ethnl_req_info *req_info,
- const struct nlmsghdr *nlhdr, struct net *net,
+ struct nlattr **tb, struct net *net,
const struct ethnl_request_ops *request_ops,
struct netlink_ext_ack *extack, bool require_dev)
{
- struct nlattr **tb;
int ret;
- tb = kmalloc_array(request_ops->max_attr + 1, sizeof(tb[0]),
- GFP_KERNEL);
- if (!tb)
- return -ENOMEM;
-
- ret = nlmsg_parse(nlhdr, GENL_HDRLEN, tb, request_ops->max_attr,
- request_ops->request_policy, extack);
- if (ret < 0)
- goto out;
ret = ethnl_parse_header_dev_get(req_info, tb[request_ops->hdr_attr],
net, extack, require_dev);
if (ret < 0)
- goto out;
+ return ret;
if (request_ops->parse_request) {
ret = request_ops->parse_request(req_info, tb, extack);
if (ret < 0)
- goto out;
+ return ret;
}
- ret = 0;
-out:
- kfree(tb);
- return ret;
+ return 0;
}
/**
@@ -334,8 +329,8 @@ static int ethnl_default_doit(struct sk_buff *skb, struct genl_info *info)
return -ENOMEM;
}
- ret = ethnl_default_parse(req_info, info->nlhdr, genl_info_net(info), ops,
- info->extack, !ops->allow_nodev_do);
+ ret = ethnl_default_parse(req_info, info->attrs, genl_info_net(info),
+ ops, info->extack, !ops->allow_nodev_do);
if (ret < 0)
goto err_dev;
ethnl_init_reply_data(reply_data, ops, req_info->dev);
@@ -480,6 +475,7 @@ out:
/* generic ->start() handler for GET requests */
static int ethnl_default_start(struct netlink_callback *cb)
{
+ const struct genl_dumpit_info *info = genl_dumpit_info(cb);
struct ethnl_dump_ctx *ctx = ethnl_dump_context(cb);
struct ethnl_reply_data *reply_data;
const struct ethnl_request_ops *ops;
@@ -502,8 +498,8 @@ static int ethnl_default_start(struct netlink_callback *cb)
goto free_req_info;
}
- ret = ethnl_default_parse(req_info, cb->nlh, sock_net(cb->skb->sk), ops,
- cb->extack, false);
+ ret = ethnl_default_parse(req_info, info->attrs, sock_net(cb->skb->sk),
+ ops, cb->extack, false);
if (req_info->dev) {
/* We ignore device specification in dump requests but as the
* same parser as for non-dump (doit) requests is used, it
@@ -696,6 +692,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_strset_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_strset_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_LINKINFO_GET,
@@ -703,11 +701,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_linkinfo_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_linkinfo_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_LINKINFO_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_linkinfo,
+ .policy = ethnl_linkinfo_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_linkinfo_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_LINKMODES_GET,
@@ -715,11 +717,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_linkmodes_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_linkmodes_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_LINKMODES_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_linkmodes,
+ .policy = ethnl_linkmodes_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_linkmodes_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_LINKSTATE_GET,
@@ -727,6 +733,8 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_linkstate_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_linkstate_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_DEBUG_GET,
@@ -734,11 +742,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_debug_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_debug_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_DEBUG_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_debug,
+ .policy = ethnl_debug_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_debug_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_WOL_GET,
@@ -747,11 +759,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_wol_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_wol_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_WOL_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_wol,
+ .policy = ethnl_wol_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_wol_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_FEATURES_GET,
@@ -759,11 +775,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_features_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_features_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_FEATURES_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_features,
+ .policy = ethnl_features_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_features_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
@@ -771,11 +791,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_privflags_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_privflags_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_PRIVFLAGS_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_privflags,
+ .policy = ethnl_privflags_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_privflags_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_RINGS_GET,
@@ -783,11 +807,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_rings_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_rings_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_RINGS_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_rings,
+ .policy = ethnl_rings_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_rings_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_CHANNELS_GET,
@@ -795,11 +823,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_channels_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_channels_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_CHANNELS_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_channels,
+ .policy = ethnl_channels_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_channels_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_COALESCE_GET,
@@ -807,11 +839,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_coalesce_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_coalesce_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_COALESCE_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_coalesce,
+ .policy = ethnl_coalesce_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_coalesce_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_PAUSE_GET,
@@ -819,11 +855,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_pause_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_pause_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_PAUSE_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_pause,
+ .policy = ethnl_pause_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_pause_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_EEE_GET,
@@ -831,11 +871,15 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_eee_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_eee_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_EEE_SET,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_eee,
+ .policy = ethnl_eee_set_policy,
+ .maxattr = ARRAY_SIZE(ethnl_eee_set_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_TSINFO_GET,
@@ -843,22 +887,30 @@ static const struct genl_ops ethtool_genl_ops[] = {
.start = ethnl_default_start,
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
+ .policy = ethnl_tsinfo_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_tsinfo_get_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_CABLE_TEST_ACT,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_act_cable_test,
+ .policy = ethnl_cable_test_act_policy,
+ .maxattr = ARRAY_SIZE(ethnl_cable_test_act_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_CABLE_TEST_TDR_ACT,
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_act_cable_test_tdr,
+ .policy = ethnl_cable_test_tdr_act_policy,
+ .maxattr = ARRAY_SIZE(ethnl_cable_test_tdr_act_policy) - 1,
},
{
.cmd = ETHTOOL_MSG_TUNNEL_INFO_GET,
.doit = ethnl_tunnel_info_doit,
.start = ethnl_tunnel_info_start,
.dumpit = ethnl_tunnel_info_dumpit,
+ .policy = ethnl_tunnel_info_get_policy,
+ .maxattr = ARRAY_SIZE(ethnl_tunnel_info_get_policy) - 1,
},
};
@@ -866,7 +918,7 @@ static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
[ETHNL_MCGRP_MONITOR] = { .name = ETHTOOL_MCGRP_MONITOR_NAME },
};
-static struct genl_family ethtool_genl_family = {
+static struct genl_family ethtool_genl_family __ro_after_init = {
.name = ETHTOOL_GENL_NAME,
.version = ETHTOOL_GENL_VERSION,
.netnsok = true,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.