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authorBen Hutchings2014-05-15 02:41:23 +0200
committerBen Hutchings2014-05-19 02:18:19 +0200
commit7455fa2422898eee3464032351d20695930d9542 (patch)
tree7b192d2c78342657dbaa0d226daf6ab0df3973e7 /include/uapi/linux/ethtool.h
parentethtool: Return immediately on error in ethtool_copy_validate_indir() (diff)
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ethtool: Name the 'no change' value for setting RSS hash key but not indir table
We usually allocate special values of u32 fields starting from the top down, so also change the value to 0xffffffff. As these operations haven't been included in a stable release yet, it's not too late to change. Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'include/uapi/linux/ethtool.h')
-rw-r--r--include/uapi/linux/ethtool.h12
1 files changed, 7 insertions, 5 deletions
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index d47d31d6fa0e..cba18e3f8fab 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -850,7 +850,8 @@ struct ethtool_rxfh_indir {
* struct ethtool_rxfh - command to get/set RX flow hash indir or/and hash key.
* @cmd: Specific command number - %ETHTOOL_GRSSH or %ETHTOOL_SRSSH
* @rss_context: RSS context identifier.
- * @indir_size: On entry, the array size of the user buffer, which may be zero.
+ * @indir_size: On entry, the array size of the user buffer, which may be zero,
+ * or (for %ETHTOOL_SRSSH), %ETH_RXFH_INDIR_NO_CHANGE.
* On return from %ETHTOOL_GRSSH, the array size of the hardware
* indirection table.
* @key_size: On entry, the array size of the user buffer in bytes,
@@ -861,10 +862,10 @@ struct ethtool_rxfh_indir {
* of size @indir_size followed by hash key of size @key_size.
*
* For %ETHTOOL_GRSSH, a @indir_size and key_size of zero means that only the
- * size should be returned. For %ETHTOOL_SRSSH, a @indir_size of 0xDEADBEEF
- * means that indir table setting is not requested and a @indir_size of zero
- * means the indir table should be reset to default values. This last feature
- * is not supported by the original implementations.
+ * size should be returned. For %ETHTOOL_SRSSH, an @indir_size of
+ * %ETH_RXFH_INDIR_NO_CHANGE means that indir table setting is not requested
+ * and a @indir_size of zero means the indir table should be reset to default
+ * values.
*/
struct ethtool_rxfh {
__u32 cmd;
@@ -874,6 +875,7 @@ struct ethtool_rxfh {
__u32 rsvd[2];
__u32 rss_config[0];
};
+#define ETH_RXFH_INDIR_NO_CHANGE 0xffffffff
/**
* struct ethtool_rx_ntuple_flow_spec - specification for RX flow filter