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ethtool: Centralise validation of ETHTOOL_{G, S}RXFHINDIR parameters

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Add a new ethtool operation (get_rxfh_indir_size) to get the
indirectional table size.  Use this to validate the user buffer size
before calling get_rxfh_indir or set_rxfh_indir.  Use get_rxnfc to get
the number of RX rings, and validate the contents of the new
indirection table before calling set_rxfh_indir.  Remove this
validation from drivers.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Acked-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings 2011-12-15 13:55:01 +00:00 • committed by David S. Miller
commit 7850f63f16
6 changed files with 118 additions and 112 deletions
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39
drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
View file

@ -2302,18 +2302,20 @@ static int bnx2x_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info,
}
}
static int bnx2x_get_rxfh_indir(struct net_device *dev,
struct ethtool_rxfh_indir *indir)
static u32 bnx2x_get_rxfh_indir_size(struct net_device *dev)
{
struct bnx2x *bp = netdev_priv(dev);
return (bp->multi_mode == ETH_RSS_MODE_DISABLED ?
0 : T_ETH_INDIRECTION_TABLE_SIZE);
}
static int bnx2x_get_rxfh_indir(struct net_device *dev, u32 *indir)
{
struct bnx2x *bp = netdev_priv(dev);
size_t copy_size =
min_t(size_t, indir->size, T_ETH_INDIRECTION_TABLE_SIZE);
u8 ind_table[T_ETH_INDIRECTION_TABLE_SIZE] = {0};
size_t i;
if (bp->multi_mode == ETH_RSS_MODE_DISABLED)
return -EOPNOTSUPP;
/* Get the current configuration of the RSS indirection table */
bnx2x_get_rss_ind_table(&bp->rss_conf_obj, ind_table);
@ -2326,33 +2328,19 @@ static int bnx2x_get_rxfh_indir(struct net_device *dev,
* align the returned table to the Client ID of the leading RSS
* queue.
*/
for (i = 0; i < copy_size; i++)
indir->ring_index[i] = ind_table[i] - bp->fp->cl_id;
indir->size = T_ETH_INDIRECTION_TABLE_SIZE;
for (i = 0; i < T_ETH_INDIRECTION_TABLE_SIZE; i++)
indir[i] = ind_table[i] - bp->fp->cl_id;
return 0;
}
static int bnx2x_set_rxfh_indir(struct net_device *dev,
const struct ethtool_rxfh_indir *indir)
static int bnx2x_set_rxfh_indir(struct net_device *dev, const u32 *indir)
{
struct bnx2x *bp = netdev_priv(dev);
size_t i;
u8 ind_table[T_ETH_INDIRECTION_TABLE_SIZE] = {0};
u32 num_eth_queues = BNX2X_NUM_ETH_QUEUES(bp);
if (bp->multi_mode == ETH_RSS_MODE_DISABLED)
return -EOPNOTSUPP;
/* validate the size */
if (indir->size != T_ETH_INDIRECTION_TABLE_SIZE)
return -EINVAL;
for (i = 0; i < T_ETH_INDIRECTION_TABLE_SIZE; i++) {
/* validate the indices */
if (indir->ring_index[i] >= num_eth_queues)
return -EINVAL;
/*
* The same as in bnx2x_get_rxfh_indir: we can't use a memcpy()
* as an internal storage of an indirection table is a u8 array
@ -2362,7 +2350,7 @@ static int bnx2x_set_rxfh_indir(struct net_device *dev,
* align the received table to the Client ID of the leading RSS
* queue
*/
ind_table[i] = indir->ring_index[i] + bp->fp->cl_id;
ind_table[i] = indir[i] + bp->fp->cl_id;
}
return bnx2x_config_rss_pf(bp, ind_table, false);
@ -2395,6 +2383,7 @@ static const struct ethtool_ops bnx2x_ethtool_ops = {
.set_phys_id = bnx2x_set_phys_id,
.get_ethtool_stats = bnx2x_get_ethtool_stats,
.get_rxnfc = bnx2x_get_rxnfc,
.get_rxfh_indir_size = bnx2x_get_rxfh_indir_size,
.get_rxfh_indir = bnx2x_get_rxfh_indir,
.set_rxfh_indir = bnx2x_set_rxfh_indir,
};