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odp-util: Make it possible to combine slow path reasons.

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It will soon be possible for a single flow to be slow pathed for multiple
reasons.  This commit makes it possible to indicate more than one reason
to slow path a flow.

This commit is logically a revert of commit 98f0520fb2 (odp-util: Make
slow_path_reasons mutually exclusive.) but details have changed.

Signed-off-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Ben Pfaff
2013-09-20 12:54:51 -07:00
parent 4fc6592603
commit 04594cd5a8
4 changed files with 69 additions and 72 deletions
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34
lib/odp-util.h
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@@ -199,14 +199,32 @@ void odp_put_tunnel_action(const struct flow_tnl *tunnel,
void odp_put_pkt_mark_action(const uint32_t pkt_mark,
struct ofpbuf *odp_actions);
/* Reasons why a subfacet might not be fast-pathable. */
enum slow_path_reason {
SLOW_CFM = 1, /* CFM packets need per-packet processing. */
SLOW_LACP, /* LACP packets need per-packet processing. */
SLOW_STP, /* STP packets need per-packet processing. */
SLOW_BFD, /* BFD packets need per-packet processing. */
SLOW_CONTROLLER, /* Packets must go to OpenFlow controller. */
__SLOW_MAX
#define SLOW_PATH_REASONS \
/* These reasons are mutually exclusive. */ \
SPR(SLOW_CFM, "cfm", "Consists of CFM packets") \
SPR(SLOW_BFD, "bfd", "Consists of BFD packets") \
SPR(SLOW_LACP, "lacp", "Consists of LACP packets") \
SPR(SLOW_STP, "stp", "Consists of STP packets") \
SPR(SLOW_CONTROLLER, "controller", \
"Sends \"packet-in\" messages to the OpenFlow controller")
/* Indexes for slow-path reasons. Client code uses "enum slow_path_reason"
* values instead of these, these are just a way to construct those. */
enum {
#define SPR(ENUM, STRING, EXPLANATION) ENUM##_INDEX,
SLOW_PATH_REASONS
#undef SPR
};
/* Reasons why a subfacet might not be fast-pathable.
*
* Each reason is a separate bit to allow reasons to be combined. */
enum slow_path_reason {
#define SPR(ENUM, STRING, EXPLANATION) ENUM = 1 << ENUM##_INDEX,
SLOW_PATH_REASONS
#undef SPR
};
const char *slow_path_reason_to_explanation(enum slow_path_reason);
#endif /* odp-util.h */