From c2b565b54e36bc33d0406afb225c9bf3d01405ef Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Mon, 26 Dec 2011 14:17:55 -0800 Subject: [PATCH] dpif: Factor 'type' and 'error' out of individual dpif_op members. I'd like to change ->dpif_flow_put() and ->dpif_execute() in the dpif provider to take the structures of the same names as parameters, instead of passing them discrete parameters, because this seems like a more sensible way to do things internally than to have two different ways to pass the parameters. It might even simplify code slightly. But ->flow_put() and ->execute() wouldn't want the 'type' (because it's implied by the function being called) or 'error' (because it would be the same as the return value). Although of course they could just ignore those members, it seems slightly cleaner to omit them entirely, as this change allows. Signed-off-by: Ben Pfaff --- lib/dpif-linux.c | 18 ++++++++---------- lib/dpif-provider.h | 2 +- lib/dpif.c | 24 ++++++++++++------------ lib/dpif.h | 20 +++++++------------- ofproto/ofproto-dpif.c | 18 ++++++++---------- 5 files changed, 36 insertions(+), 46 deletions(-) diff --git a/lib/dpif-linux.c b/lib/dpif-linux.c index 741a6f0e..36e93cc3 100644 --- a/lib/dpif-linux.c +++ b/lib/dpif-linux.c @@ -873,7 +873,7 @@ dpif_linux_execute(struct dpif *dpif_, } static void -dpif_linux_operate(struct dpif *dpif_, union dpif_op **ops, size_t n_ops) +dpif_linux_operate(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops) { struct dpif_linux *dpif = dpif_linux_cast(dpif_); struct nl_transaction **txnsp; @@ -883,10 +883,10 @@ dpif_linux_operate(struct dpif *dpif_, union dpif_op **ops, size_t n_ops) txns = xmalloc(n_ops * sizeof *txns); for (i = 0; i < n_ops; i++) { struct nl_transaction *txn = &txns[i]; - union dpif_op *op = ops[i]; + struct dpif_op *op = ops[i]; if (op->type == DPIF_OP_FLOW_PUT) { - struct dpif_flow_put *put = &op->flow_put; + struct dpif_flow_put *put = &op->u.flow_put; struct dpif_linux_flow request; dpif_linux_init_flow_put(dpif_, put->flags, put->key, put->key_len, @@ -898,7 +898,7 @@ dpif_linux_operate(struct dpif *dpif_, union dpif_op **ops, size_t n_ops) txn->request = ofpbuf_new(1024); dpif_linux_flow_to_ofpbuf(&request, txn->request); } else if (op->type == DPIF_OP_EXECUTE) { - struct dpif_execute *execute = &op->execute; + struct dpif_execute *execute = &op->u.execute; txn->request = dpif_linux_encode_execute( dpif->dp_ifindex, execute->key, execute->key_len, @@ -919,10 +919,10 @@ dpif_linux_operate(struct dpif *dpif_, union dpif_op **ops, size_t n_ops) for (i = 0; i < n_ops; i++) { struct nl_transaction *txn = &txns[i]; - union dpif_op *op = ops[i]; + struct dpif_op *op = ops[i]; if (op->type == DPIF_OP_FLOW_PUT) { - struct dpif_flow_put *put = &op->flow_put; + struct dpif_flow_put *put = &op->u.flow_put; int error = txn->error; if (!error && put->stats) { @@ -933,11 +933,9 @@ dpif_linux_operate(struct dpif *dpif_, union dpif_op **ops, size_t n_ops) dpif_linux_flow_get_stats(&reply, put->stats); } } - put->error = error; + op->error = error; } else if (op->type == DPIF_OP_EXECUTE) { - struct dpif_execute *execute = &op->execute; - - execute->error = txn->error; + op->error = txn->error; } else { NOT_REACHED(); } diff --git a/lib/dpif-provider.h b/lib/dpif-provider.h index 916b4612..1b32a79d 100644 --- a/lib/dpif-provider.h +++ b/lib/dpif-provider.h @@ -299,7 +299,7 @@ struct dpif_class { * * This function is optional. It is only worthwhile to implement it if * 'dpif' can perform operations in batch faster than individually. */ - void (*operate)(struct dpif *dpif, union dpif_op **ops, size_t n_ops); + void (*operate)(struct dpif *dpif, struct dpif_op **ops, size_t n_ops); /* Enables or disables receiving packets with dpif_recv() for 'dpif'. * Turning packet receive off and then back on is allowed to change Netlink diff --git a/lib/dpif.c b/lib/dpif.c index 4edf54e8..328ffa39 100644 --- a/lib/dpif.c +++ b/lib/dpif.c @@ -984,7 +984,7 @@ dpif_execute(struct dpif *dpif, * This function exists because some datapaths can perform batched operations * faster than individual operations. */ void -dpif_operate(struct dpif *dpif, union dpif_op **ops, size_t n_ops) +dpif_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops) { size_t i; @@ -994,25 +994,25 @@ dpif_operate(struct dpif *dpif, union dpif_op **ops, size_t n_ops) } for (i = 0; i < n_ops; i++) { - union dpif_op *op = ops[i]; + struct dpif_op *op = ops[i]; struct dpif_flow_put *put; struct dpif_execute *execute; switch (op->type) { case DPIF_OP_FLOW_PUT: - put = &op->flow_put; - put->error = dpif_flow_put(dpif, put->flags, - put->key, put->key_len, - put->actions, put->actions_len, - put->stats); + put = &op->u.flow_put; + op->error = dpif_flow_put(dpif, put->flags, + put->key, put->key_len, + put->actions, put->actions_len, + put->stats); break; case DPIF_OP_EXECUTE: - execute = &op->execute; - execute->error = dpif_execute(dpif, execute->key, execute->key_len, - execute->actions, - execute->actions_len, - execute->packet); + execute = &op->u.execute; + op->error = dpif_execute(dpif, execute->key, execute->key_len, + execute->actions, + execute->actions_len, + execute->packet); break; default: diff --git a/lib/dpif.h b/lib/dpif.h index f2a9c489..3fd33f00 100644 --- a/lib/dpif.h +++ b/lib/dpif.h @@ -181,8 +181,6 @@ enum dpif_op_type { }; struct dpif_flow_put { - enum dpif_op_type type; /* Always DPIF_OP_FLOW_PUT. */ - /* Input. */ enum dpif_flow_put_flags flags; /* DPIF_FP_*. */ const struct nlattr *key; /* Flow to put. */ @@ -192,30 +190,26 @@ struct dpif_flow_put { /* Output. */ struct dpif_flow_stats *stats; /* Optional flow statistics. */ - int error; /* 0 or positive errno value. */ }; struct dpif_execute { - enum dpif_op_type type; /* Always DPIF_OP_EXECUTE. */ - - /* Input. */ const struct nlattr *key; /* Partial flow key (only for metadata). */ size_t key_len; /* Length of 'key' in bytes. */ const struct nlattr *actions; /* Actions to execute on packet. */ size_t actions_len; /* Length of 'actions' in bytes. */ const struct ofpbuf *packet; /* Packet to execute. */ - - /* Output. */ - int error; /* 0 or positive errno value. */ }; -union dpif_op { +struct dpif_op { enum dpif_op_type type; - struct dpif_flow_put flow_put; - struct dpif_execute execute; + int error; + union { + struct dpif_flow_put flow_put; + struct dpif_execute execute; + } u; }; -void dpif_operate(struct dpif *, union dpif_op **ops, size_t n_ops); +void dpif_operate(struct dpif *, struct dpif_op **ops, size_t n_ops); /* Upcalls. */ diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c index a26981d6..d46fcf3c 100644 --- a/ofproto/ofproto-dpif.c +++ b/ofproto/ofproto-dpif.c @@ -2413,7 +2413,7 @@ struct flow_miss { }; struct flow_miss_op { - union dpif_op dpif_op; + struct dpif_op dpif_op; struct subfacet *subfacet; }; @@ -2587,9 +2587,9 @@ handle_flow_miss(struct ofproto_dpif *ofproto, struct flow_miss *miss, } op = &ops[(*n_ops)++]; - execute = &op->dpif_op.execute; + execute = &op->dpif_op.u.execute; op->subfacet = subfacet; - execute->type = DPIF_OP_EXECUTE; + op->dpif_op.type = DPIF_OP_EXECUTE; execute->key = miss->key; execute->key_len = miss->key_len; execute->actions = (facet->may_install @@ -2602,10 +2602,10 @@ handle_flow_miss(struct ofproto_dpif *ofproto, struct flow_miss *miss, if (facet->may_install && subfacet->key_fitness != ODP_FIT_TOO_LITTLE) { struct flow_miss_op *op = &ops[(*n_ops)++]; - struct dpif_flow_put *put = &op->dpif_op.flow_put; + struct dpif_flow_put *put = &op->dpif_op.u.flow_put; op->subfacet = subfacet; - put->type = DPIF_OP_FLOW_PUT; + op->dpif_op.type = DPIF_OP_FLOW_PUT; put->flags = DPIF_FP_CREATE | DPIF_FP_MODIFY; put->key = miss->key; put->key_len = miss->key_len; @@ -2687,7 +2687,7 @@ handle_miss_upcalls(struct ofproto_dpif *ofproto, struct dpif_upcall *upcalls, struct dpif_upcall *upcall; struct flow_miss *miss, *next_miss; struct flow_miss_op flow_miss_ops[FLOW_MISS_MAX_BATCH * 2]; - union dpif_op *dpif_ops[FLOW_MISS_MAX_BATCH * 2]; + struct dpif_op *dpif_ops[FLOW_MISS_MAX_BATCH * 2]; struct hmap todo; size_t n_ops; size_t i; @@ -2758,11 +2758,10 @@ handle_miss_upcalls(struct ofproto_dpif *ofproto, struct dpif_upcall *upcalls, for (i = 0; i < n_ops; i++) { struct flow_miss_op *op = &flow_miss_ops[i]; struct dpif_execute *execute; - struct dpif_flow_put *put; switch (op->dpif_op.type) { case DPIF_OP_EXECUTE: - execute = &op->dpif_op.execute; + execute = &op->dpif_op.u.execute; if (op->subfacet->actions != execute->actions) { free((struct nlattr *) execute->actions); } @@ -2770,8 +2769,7 @@ handle_miss_upcalls(struct ofproto_dpif *ofproto, struct dpif_upcall *upcalls, break; case DPIF_OP_FLOW_PUT: - put = &op->dpif_op.flow_put; - if (!put->error) { + if (!op->dpif_op.error) { op->subfacet->installed = true; } break; -- 2.30.2