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authorNeale Ranns <nranns@cisco.com>2019-11-08 12:42:31 +0000
committerOle Trøan <otroan@employees.org>2019-11-26 09:15:11 +0000
commit9db6ada779794779158163f6293b479ae7f6ad5e (patch)
tree53dd65975958b2d87b1cd312e612b45d7225e531 /src/vnet/mfib/mfib_entry_src.h
parent0d3d4824a46205e776ff32c82be4cb514f459a5f (diff)
fib: Table Replace
Type: feature from the API doc, a table replace is: " The use-case is that, for some unspecified reason, the control plane has a very different set of entries it wants in the table than VPP currently has. The CP would thus like to 'replace' VPP's current table only by specifying what the new set of entries shall be, i.e. it is not going to delete anything that already eixts. the CP delcartes the start of this procedure with this begin_replace API Call, and when it has populated all the entries it wants, it calls the below end_replace API. From this point on it is of coursce free to add and delete entries as usual. The underlying mechanism by which VPP implements this replace is purposefully left unspecified. " In the FIB, the algorithm is implemented using mark and sweep. Algorithm goes: 1) replace_begin: this marks all the entries in that table as 'stale' 2) download all the entries that should be in this table - this clears the stale flag on those entries 3) signal the table converged: ip_table_replace_end - this removes all entries that are still stale this procedure can be used when an agent first connects to VPP, as an alternative to dump and diff state reconciliation. Change-Id: I168edec10cf7670866076b129ebfe6149ea8222e Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/mfib/mfib_entry_src.h')
-rw-r--r--src/vnet/mfib/mfib_entry_src.h49
1 files changed, 48 insertions, 1 deletions
diff --git a/src/vnet/mfib/mfib_entry_src.h b/src/vnet/mfib/mfib_entry_src.h
index 86752e071ec..b85c010779c 100644
--- a/src/vnet/mfib/mfib_entry_src.h
+++ b/src/vnet/mfib/mfib_entry_src.h
@@ -28,6 +28,48 @@ typedef struct mfib_path_ext_t_
} mfib_path_ext_t;
/**
+ * Flags for the source data
+ */
+typedef enum mfib_entry_src_attribute_t_ {
+ /**
+ * Marker. Add new values after this one.
+ */
+ MFIB_ENTRY_SRC_ATTRIBUTE_FIRST,
+ /**
+ * the source has been added to the entry
+ */
+ MFIB_ENTRY_SRC_ATTRIBUTE_STALE = MFIB_ENTRY_SRC_ATTRIBUTE_FIRST,
+ /**
+ * Marker. add new entries before this one.
+ */
+ MFIB_ENTRY_SRC_ATTRIBUTE_LAST = MFIB_ENTRY_SRC_ATTRIBUTE_STALE,
+} mfib_entry_src_attribute_t;
+
+
+#define MFIB_ENTRY_SRC_ATTRIBUTES { \
+ [MFIB_ENTRY_SRC_ATTRIBUTE_STALE] = "stale", \
+}
+
+#define FOR_EACH_MFIB_SRC_ATTRIBUTE(_item) \
+ for (_item = MFIB_ENTRY_SRC_ATTRIBUTE_FIRST; \
+ _item <= MFIB_ENTRY_SRC_ATTRIBUTE_LAST; \
+ _item++)
+
+typedef enum mfib_entry_src_flag_t_ {
+ MFIB_ENTRY_SRC_FLAG_NONE = 0,
+ MFIB_ENTRY_SRC_FLAG_STALE = (1 << MFIB_ENTRY_SRC_ATTRIBUTE_STALE),
+} __attribute__ ((packed)) mfib_entry_src_flags_t;
+
+extern u8 * format_mfib_entry_src_flags(u8 *s, va_list *args);
+
+/*
+ * Keep the size of the flags field to 2 bytes, so it
+ * can be placed next to the 2 bytes reference count
+ */
+STATIC_ASSERT (sizeof(mfib_entry_src_flags_t) <= 2,
+ "FIB entry flags field size too big");
+
+/**
* The source of an MFIB entry
*/
typedef struct mfib_entry_src_t_
@@ -40,7 +82,12 @@ typedef struct mfib_entry_src_t_
/**
* Route flags
*/
- mfib_entry_flags_t mfes_flags;
+ mfib_entry_flags_t mfes_route_flags;
+
+ /**
+ * Source flags
+ */
+ mfib_entry_src_flags_t mfes_flags;
/**
* The reference count on the entry. this is a u32