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ila: add checksum neutral ILA translations

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Support checksum neutral ILA as described in the ILA draft. The low
order 16 bits of the identifier are used to contain the checksum
adjustment value.

The csum-mode parameter is added to described checksum processing. There
are three values:
 - adjust transport checksum (previous behavior)
 - do checksum neutral mapping
 - do nothing

On output the csum-mode in the ila_params is checked and acted on. If
mode is checksum neutral mapping then to mapping and set C-bit.

On input, C-bit is checked. If it is set checksum-netural mapping is
done (regardless of csum-mode in ila params) and C-bit will be cleared.
If it is not set then action in csum-mode is taken.

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2016-04-23 11:46:57 -07:00 • committed by David S. Miller
parent 642c2c9558
commit 90bfe662db
5 changed files with 112 additions and 15 deletions
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7
include/uapi/linux/ila.h
View file

@ -15,6 +15,7 @@ enum {
ILA_ATTR_IFINDEX, /* s32 */
ILA_ATTR_DIR, /* u32 */
ILA_ATTR_PAD,
ILA_ATTR_CSUM_MODE, /* u8 */
__ILA_ATTR_MAX,
};
@ -35,4 +36,10 @@ enum {
#define ILA_DIR_IN (1 << 0)
#define ILA_DIR_OUT (1 << 1)
enum {
ILA_CSUM_ADJUST_TRANSPORT,
ILA_CSUM_NEUTRAL_MAP,
ILA_CSUM_NO_ACTION,
};
#endif /* _UAPI_LINUX_ILA_H */