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dpif: Document datapath masking.

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Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Andy Zhou <azhou@nicira.com>
This commit is contained in:
Ben Pfaff
2013-11-12 17:10:16 -08:00
parent 9dd165e050
commit ee75c5460e
2 changed files with 43 additions and 13 deletions
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12
lib/dpif.c
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@@ -883,15 +883,19 @@ dpif_flow_put__(struct dpif *dpif, const struct dpif_flow_put *put)
/* Adds or modifies a flow in 'dpif'. The flow is specified by the Netlink
* attribute OVS_FLOW_ATTR_KEY with types OVS_KEY_ATTR_* in the 'key_len' bytes
* starting at 'key', and OVS_FLOW_ATTR_MASK with types of OVS_KEY_ATTR_* in the
* 'mask_len' bytes starting at 'mask'. The associated actions are specified by
* the Netlink attributes with types OVS_ACTION_ATTR_* in the 'actions_len'
* bytes starting at 'actions'.
* starting at 'key', and OVS_FLOW_ATTR_MASK with types of OVS_KEY_ATTR_* in
* the 'mask_len' bytes starting at 'mask'. The associated actions are
* specified by the Netlink attributes with types OVS_ACTION_ATTR_* in the
* 'actions_len' bytes starting at 'actions'.
*
* - If the flow's key does not exist in 'dpif', then the flow will be added if
* 'flags' includes DPIF_FP_CREATE. Otherwise the operation will fail with
* ENOENT.
*
* The datapath may reject attempts to insert overlapping flows with EINVAL
* or EEXIST, but clients should not rely on this: avoiding overlapping flows
* is primarily the client's responsibility.
*
* If the operation succeeds, then 'stats', if nonnull, will be zeroed.
*
* - If the flow's key does exist in 'dpif', then the flow's actions will be