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Add support for matching Ethernet multicast frames.

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This commit is contained in:
Ben Pfaff
2010-11-11 10:46:23 -08:00
parent b6c9e612fa
commit 1e37a2d751
8 changed files with 122 additions and 22 deletions
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29
lib/flow.h
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@@ -93,14 +93,27 @@ flow_hash(const struct flow *flow, uint32_t basis)
return hash_bytes(flow, FLOW_SIG_SIZE, basis);
}
/* Set to 1 in the 'wildcards' member of struct flow_wildcards if any bits in
* any of the reg_masks are wildcarded. This maintains the invariant that
* 'wildcards' is nonzero if and only if any bits are wildcarded.
/* Open vSwitch internal-only wildcard bits.
*
* This is used only internally to Open vSwitch--it never appears in the wire
* protocol. */
* These are used only internally to Open vSwitch, in the 'wildcards' member of
* struct flow_wildcards. They never appear in the wire protocol in this
* form. */
/* Set to 1 if any bits in any of the reg_masks are wildcarded. This maintains
* the invariant that 'wildcards' is nonzero if and only if any bits are
* wildcarded. */
#define FWW_REGS (1u << 31)
BUILD_ASSERT_DECL(!(FWW_REGS & OVSFW_ALL)); /* Avoid collisions. */
/* Set to 1 if bit 0 (the multicast bit) of the flow's dl_dst is wildcarded.
*
* (We reinterpret OFPFW_DL_DST as excluding bit 0. Both OFPFW_DL_DST and
* FWW_ETH_MCAST have to be set to wildcard the entire Ethernet destination
* address.) */
#define FWW_ETH_MCAST (1u << 30)
/* Avoid collisions. */
#define FWW_ALL (FWW_REGS | FWW_ETH_MCAST)
BUILD_ASSERT_DECL(!(FWW_ALL & OVSFW_ALL));
/* Information on wildcards for a flow, as a supplement to "struct flow".
*
@@ -110,7 +123,7 @@ BUILD_ASSERT_DECL(!(FWW_REGS & OVSFW_ALL)); /* Avoid collisions. */
* 1. 'wildcards' is nonzero if and only if at least one bit or field is
* wildcarded.
*
* 2. Bits in 'wildcards' not included in OVSFW_ALL or FWW_REGS are set to 0.
* 2. Bits in 'wildcards' not included in OVSFW_ALL or FWW_ALL are set to 0.
* (This is a corollary to invariant #1.)
*
* 3. The fields in 'wildcards' masked by OFPFW_NW_SRC_MASK and
@@ -127,7 +140,7 @@ BUILD_ASSERT_DECL(!(FWW_REGS & OVSFW_ALL)); /* Avoid collisions. */
* other members can be correctly predicted based on 'wildcards' alone.
*/
struct flow_wildcards {
uint32_t wildcards; /* enum ofp_flow_wildcards. */
uint32_t wildcards; /* OFPFW_* | OVSFW_* | FWW_*. */
uint32_t reg_masks[FLOW_N_REGS]; /* 1-bit in each significant regs bit. */
ovs_be32 nw_src_mask; /* 1-bit in each significant nw_src bit. */
ovs_be32 nw_dst_mask; /* 1-bit in each significant nw_dst bit. */