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net: dsa: bcm_sf2: Fix IP fragment location and behavior

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[ Upstream commit 7c3125f0a6ebc17846c5908ad7d6056d66c1c426 ]

The IP fragment is specified through user-defined field as the first
bit of the first user-defined word. We were previously trying to extract
it from the user-defined mask which could not possibly work. The ip_frag
is also supposed to be a boolean, if we do not cast it as such, we risk
overwriting the next fields in CFP_DATA(6) which would render the rule
inoperative.

Fixes: 7318166cac ("net: dsa: bcm_sf2: Add support for ethtool::rxnfc")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Florian Fainelli 2019-12-20 11:24:21 -08:00 • committed by Greg Kroah-Hartman
commit 770247f2b2
1 changed files with 3 additions and 3 deletions
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6
drivers/net/dsa/bcm_sf2_cfp.c
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@ -358,7 +358,7 @@ static int bcm_sf2_cfp_ipv4_rule_set(struct bcm_sf2_priv *priv, int port,
return -EINVAL;
}
ip_frag = be32_to_cpu(fs->m_ext.data[0]);
ip_frag = !!(be32_to_cpu(fs->h_ext.data[0]) & 1);
/* Locate the first rule available */
if (fs->location == RX_CLS_LOC_ANY)
@ -569,7 +569,7 @@ static int bcm_sf2_cfp_rule_cmp(struct bcm_sf2_priv *priv, int port,
if (rule->fs.flow_type != fs->flow_type ||
rule->fs.ring_cookie != fs->ring_cookie ||
rule->fs.m_ext.data[0] != fs->m_ext.data[0])
rule->fs.h_ext.data[0] != fs->h_ext.data[0])
continue;
switch (fs->flow_type & ~FLOW_EXT) {
@ -621,7 +621,7 @@ static int bcm_sf2_cfp_ipv6_rule_set(struct bcm_sf2_priv *priv, int port,
return -EINVAL;
}
ip_frag = be32_to_cpu(fs->m_ext.data[0]);
ip_frag = !!(be32_to_cpu(fs->h_ext.data[0]) & 1);
layout = &udf_tcpip6_layout;
slice_num = bcm_sf2_get_slice_number(layout, 0);