From 5701f7db2d05c59b7edb51325a4cbed72aec7c90 Mon Sep 17 00:00:00 2001 From: Ben Hutchings Date: Thu, 15 Dec 2011 13:55:01 +0000 Subject: ethtool: Centralise validation of ETHTOOL_{G, S}RXFHINDIR parameters 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 Acked-by: Dimitris Michailidis Signed-off-by: David S. Miller --- include/linux/ethtool.h | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index c6e427ab65fe..eaed40f1b7af 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -864,9 +864,13 @@ bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported); * error code or zero. * @set_rx_ntuple: Set an RX n-tuple rule. Returns a negative error code * or zero. + * @get_rxfh_indir_size: Get the size of the RX flow hash indirection table. + * Returns zero if not supported for this specific device. * @get_rxfh_indir: Get the contents of the RX flow hash indirection table. + * Will not be called if @get_rxfh_indir_size returns zero. * Returns a negative error code or zero. * @set_rxfh_indir: Set the contents of the RX flow hash indirection table. + * Will not be called if @get_rxfh_indir_size returns zero. * Returns a negative error code or zero. * @get_channels: Get number of channels. * @set_channels: Set number of channels. Returns a negative error code or @@ -942,10 +946,9 @@ struct ethtool_ops { int (*reset)(struct net_device *, u32 *); int (*set_rx_ntuple)(struct net_device *, struct ethtool_rx_ntuple *); - int (*get_rxfh_indir)(struct net_device *, - struct ethtool_rxfh_indir *); - int (*set_rxfh_indir)(struct net_device *, - const struct ethtool_rxfh_indir *); + u32 (*get_rxfh_indir_size)(struct net_device *); + int (*get_rxfh_indir)(struct net_device *, u32 *); + int (*set_rxfh_indir)(struct net_device *, const u32 *); void (*get_channels)(struct net_device *, struct ethtool_channels *); int (*set_channels)(struct net_device *, struct ethtool_channels *); int (*get_dump_flag)(struct net_device *, struct ethtool_dump *); -- cgit v1.2.3