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Code Issues Releases Wiki Activity

ethtool: plca: fix plca enable data type while parsing the value

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The ETHTOOL_A_PLCA_ENABLED data type is u8. But while parsing the
value from the attribute, nla_get_u32() is used in the plca_update_sint()
function instead of nla_get_u8(). So plca_cfg.enabled variable is updated
with some garbage value instead of 0 or 1 and always enables plca even
though plca is disabled through ethtool application. This bug has been
fixed by parsing the values based on the attributes type in the policy.

Fixes: 8580e16c28 ("net/ethtool: add netlink interface for the PLCA RS")
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230908044548.5878-1-Parthiban.Veerasooran@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Parthiban Veerasooran 2023-09-08 10:15:48 +05:30 committed by Jakub Kicinski
parent eea03d18af
commit 8957261cd8
1 changed files with 29 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

45
net/ethtool/plca.c
View file

@ -21,16 +21,6 @@ struct plca_reply_data {
#define PLCA_REPDATA(__reply_base) \
container_of(__reply_base, struct plca_reply_data, base)
static void plca_update_sint(int *dst, const struct nlattr *attr,
bool *mod)
{
if (!attr)
return;
*dst = nla_get_u32(attr);
*mod = true;
}
// PLCA get configuration message ------------------------------------------- //
const struct nla_policy ethnl_plca_get_cfg_policy[] = {
@ -38,6 +28,29 @@ const struct nla_policy ethnl_plca_get_cfg_policy[] = {
NLA_POLICY_NESTED(ethnl_header_policy),
};
static void plca_update_sint(int *dst, struct nlattr **tb, u32 attrid,
bool *mod)
{
const struct nlattr *attr = tb[attrid];
if (!attr ||
WARN_ON_ONCE(attrid >= ARRAY_SIZE(ethnl_plca_set_cfg_policy)))
return;
switch (ethnl_plca_set_cfg_policy[attrid].type) {
case NLA_U8:
*dst = nla_get_u8(attr);
break;
case NLA_U32:
*dst = nla_get_u32(attr);
break;
default:
WARN_ON_ONCE(1);
}
*mod = true;
}
static int plca_get_cfg_prepare_data(const struct ethnl_req_info *req_base,
struct ethnl_reply_data *reply_base,
const struct genl_info *info)
@ -144,13 +157,13 @@ ethnl_set_plca(struct ethnl_req_info *req_info, struct genl_info *info)
return -EOPNOTSUPP;
memset(&plca_cfg, 0xff, sizeof(plca_cfg));
plca_update_sint(&plca_cfg.enabled, tb[ETHTOOL_A_PLCA_ENABLED], &mod);
plca_update_sint(&plca_cfg.node_id, tb[ETHTOOL_A_PLCA_NODE_ID], &mod);
plca_update_sint(&plca_cfg.node_cnt, tb[ETHTOOL_A_PLCA_NODE_CNT], &mod);
plca_update_sint(&plca_cfg.to_tmr, tb[ETHTOOL_A_PLCA_TO_TMR], &mod);
plca_update_sint(&plca_cfg.burst_cnt, tb[ETHTOOL_A_PLCA_BURST_CNT],
plca_update_sint(&plca_cfg.enabled, tb, ETHTOOL_A_PLCA_ENABLED, &mod);
plca_update_sint(&plca_cfg.node_id, tb, ETHTOOL_A_PLCA_NODE_ID, &mod);
plca_update_sint(&plca_cfg.node_cnt, tb, ETHTOOL_A_PLCA_NODE_CNT, &mod);
plca_update_sint(&plca_cfg.to_tmr, tb, ETHTOOL_A_PLCA_TO_TMR, &mod);
plca_update_sint(&plca_cfg.burst_cnt, tb, ETHTOOL_A_PLCA_BURST_CNT,
&mod);
plca_update_sint(&plca_cfg.burst_tmr, tb[ETHTOOL_A_PLCA_BURST_TMR],
plca_update_sint(&plca_cfg.burst_tmr, tb, ETHTOOL_A_PLCA_BURST_TMR,
&mod);
if (!mod)
return 0;