diff options
| author | Ben Hutchings <bhutchings@solarflare.com> | 2011-09-06 17:52:47 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-09-17 03:25:10 +0400 |
| commit | 473e64ee4603671efa1e0785418e56e9ffdfc47b (patch) | |
| tree | ff40ee34b7ac14c920993bb655527338419dea63 /drivers/net | |
| parent | 815c7db5c809ea3d5735de3131ecdf758b0e14ff (diff) | |
| download | linux-473e64ee4603671efa1e0785418e56e9ffdfc47b.tar.xz | |
ethtool: Update ethtool_rxnfc::rule_cnt on return from ETHTOOL_GRXCLSRLALL
A user-space process must use ETHTOOL_GRXCLSRLCNT to find the number
of classification rules, then allocate a buffer of the right size,
then use ETHTOOL_GRXCLSRLALL to fill the buffer. If some other
process inserts or deletes a rule between those two operations,
the user buffer might turn out to be the wrong size.
If it's too small, the return value will be -EMSGSIZE. But if it's
too large, there is no indication of this. Fix this by updating
the rule_cnt field on return.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/freescale/gianfar_ethtool.c | 1 | ||||
| -rw-r--r-- | drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/sun/niu.c | 2 |
3 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/gianfar_ethtool.c b/drivers/net/ethernet/freescale/gianfar_ethtool.c index 42238301c425..f30b96fee840 100644 --- a/drivers/net/ethernet/freescale/gianfar_ethtool.c +++ b/drivers/net/ethernet/freescale/gianfar_ethtool.c @@ -1676,6 +1676,7 @@ static int gfar_get_cls_all(struct gfar_private *priv, } cmd->data = MAX_FILER_IDX; + cmd->rule_cnt = i; return 0; } diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c index c0003babc06b..b8410bcaa898 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c @@ -2283,6 +2283,8 @@ static int ixgbe_get_ethtool_fdir_all(struct ixgbe_adapter *adapter, cnt++; } + cmd->rule_cnt = cnt; + return 0; } diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c index 5e1e1d2748ae..d1338885dc8b 100644 --- a/drivers/net/ethernet/sun/niu.c +++ b/drivers/net/ethernet/sun/niu.c @@ -7299,6 +7299,8 @@ static int niu_get_ethtool_tcam_all(struct niu *np, } niu_unlock_parent(np, flags); + nfc->rule_cnt = cnt; + return ret; } |