[dpdk-dev] [PATCH] app/testpmd: support age shared action context
Matan Azrad
matan at nvidia.com
Tue Nov 3 08:33:25 CET 2020
Hi Ferruh
Thank you for the fast review.
Please see inline
From: Ferruh Yigit
> On 11/1/2020 5:48 PM, Matan Azrad wrote:
> > When an age action becomes aged-out the rte_flow_get_aged_flows should
> > return the action context supplied by the configuration structure.
> >
> > In case the age action created by the shared action API, the shared
> > action context of the Testpmd application was not set.
> >
> > In addition, the application handler of the contexts returned by the
> > rte_flow_get_aged_flows API didn't consider the fact that the action
> > could be set by the shared action API and considered it as regular
> > flow context.
> >
> > This caused a crash in Testpmd when the context is parsed.
> >
> > This patch set context type in the flow and shared action context and
> > uses it to parse the aged-out contexts correctly.
> >
> > Signed-off-by: Matan Azrad <matan at nvidia.com>
> > Acked-by: Dekel Peled <dekelp at nvidia.com>
> > ---
> > app/test-pmd/config.c | 57 ++++++++++++++++++++++++++++++++++++-----
> ---------
> > app/test-pmd/testpmd.h | 7 +++++++
> > 2 files changed, 48 insertions(+), 16 deletions(-)
> >
> > diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c index
> > e0203f0..3581f3d 100644
> > --- a/app/test-pmd/config.c
> > +++ b/app/test-pmd/config.c
> > @@ -1665,8 +1665,10 @@ void port_flow_tunnel_create(portid_t port_id,
> const struct tunnel_ops *ops)
> > return NULL;
> > }
> > if (rte_flow_conv(RTE_FLOW_CONV_OP_RULE, &pf->rule, ret, &rule,
> > - error) >= 0)
> > + error) >= 0) {
> > + pf->ctype = CONTEXT_TYPE_FLOW;
> > return pf;
> > + }
> > free(pf);
> > return NULL;
> > }
> > @@ -1831,6 +1833,7 @@ void port_flow_tunnel_create(portid_t port_id,
> const struct tunnel_ops *ops)
> > }
> > psa->next = *ppsa;
> > psa->id = id;
> > + psa->ctype = CONTEXT_TYPE_SHARED_ACTION;
> > *ppsa = psa;
> > *action = psa;
> > return 0;
> > @@ -1849,6 +1852,12 @@ void port_flow_tunnel_create(portid_t port_id,
> const struct tunnel_ops *ops)
> > ret = action_alloc(port_id, id, &psa);
> > if (ret)
> > return ret;
> > + if (action->type == RTE_FLOW_ACTION_TYPE_AGE) {
> > + struct rte_flow_action_age *age =
> > + (void *)(uintptr_t)(action->conf);
> > +
> > + age->context = psa;
> > + }
>
> The port flow is using 'update_age_action_context()' function, can same
> function be utilized to update age context for shared action too?
For updating flow context, the code iterates all actions to find the age action - so it worth to call dedicate function.
For updating shared action context - it a direct access.
So, they have different search method.
>
> btw, not sure why 'update_age_action_context()' is not static, if you will touch
> it can you please make it static function?
>
> And overall this context setting for the age action is requiring the special
> conditions in the flow create path, can you please check if it can be moved to
> 'cmdline_flow.c' for age parsing code somehow?
>
> > /* Poisoning to make sure PMDs update it in case of error. */
> > memset(&error, 0x22, sizeof(error));
> > psa->action = rte_flow_shared_action_create(port_id, conf,
> > action, @@ -2379,7 +2388,10 @@ struct rte_flow_shared_action *
> > void **contexts;
> > int nb_context, total = 0, idx;
> > struct rte_flow_error error;
> > - struct port_flow *pf;
> > + union {
> > + struct port_flow *pf;
> > + struct port_shared_action *psa;
> > + } ctx;
> >
> > if (port_id_is_invalid(port_id, ENABLED_WARN) ||
> > port_id == (portid_t)RTE_PORT_ALL) @@ -2397,7 +2409,7 @@
> > struct rte_flow_shared_action *
> > printf("Cannot allocate contexts for aged flow\n");
> > return;
> > }
> > - printf("ID\tGroup\tPrio\tAttr\n");
> > + printf("%-20s\tID\tGroup\tPrio\tAttr\n", "Type");
> > nb_context = rte_flow_get_aged_flows(port_id, contexts, total, &error);
> > if (nb_context != total) {
> > printf("Port:%d get aged flows count(%d) !=
> > total(%d)\n", @@ -2406,18 +2418,31 @@ struct rte_flow_shared_action *
> > return;
> > }
> > for (idx = 0; idx < nb_context; idx++) {
> > - pf = (struct port_flow *)contexts[idx];
> > - if (!pf) {
> > + ctx.pf = (struct port_flow *)contexts[idx];
> > + if (!ctx.pf) {
> > printf("Error: get Null context in port %u\n", port_id);
> > continue;
> > }
> > - printf("%" PRIu32 "\t%" PRIu32 "\t%" PRIu32 "\t%c%c%c\t\n",
> > - pf->id,
> > - pf->rule.attr->group,
> > - pf->rule.attr->priority,
> > - pf->rule.attr->ingress ? 'i' : '-',
> > - pf->rule.attr->egress ? 'e' : '-',
> > - pf->rule.attr->transfer ? 't' : '-');
> > + switch (ctx.pf->ctype) {
>
>
> At this stage you don't know if the context is 'pf' or 'psa', but you rely that both
> structure first element is "enum testpmd_context_type" and this requirement is
> completely undocumented.
Yes, will add a comment.
>
> Why don't create a common context and pass that one the the age action for
> both 'pf' & 'psa', like
>
> struct port_flow_age_action_context {
> enum testpmd_context_type ctype;
> union {
> struct port_flow *pf;
> struct port_shared_action *psa;
> } ctx;
> };
We considered this option too,
It looked us more optimized to not utilize more memory and alloc\free time for each age context.
One more option we considered:
Use age action context pointer as uint32_t\uintptr_t - use 2 bits for type and others for pf->id psa->id.
What do you think about this?
> I think this also prevents to corrupt 'pf' and 'psa' just for age action.
>
> > + case CONTEXT_TYPE_FLOW:
> > + printf("%-20s\t%" PRIu32 "\t%" PRIu32 "\t%" PRIu32
> > + "\t%c%c%c\t\n",
> > + "Flow",
> > + ctx.pf->id,
> > + ctx.pf->rule.attr->group,
> > + ctx.pf->rule.attr->priority,
> > + ctx.pf->rule.attr->ingress ? 'i' : '-',
> > + ctx.pf->rule.attr->egress ? 'e' : '-',
> > + ctx.pf->rule.attr->transfer ? 't' : '-');
> > + break;
> > + case CONTEXT_TYPE_SHARED_ACTION:
> > + printf("%-20s\t%" PRIu32 "\n", "Shared action",
> > + ctx.psa->id);
> > + break;
> > + default:
> > + printf("Error: invalid context type %u\n", port_id);
> > + break;
> > + }
> > }
> > if (destroy) {
> > int ret;
> > @@ -2426,15 +2451,15 @@ struct rte_flow_shared_action *
> > total = 0;
> > printf("\n");
> > for (idx = 0; idx < nb_context; idx++) {
> > - pf = (struct port_flow *)contexts[idx];
> > - if (!pf)
> > + ctx.pf = (struct port_flow *)contexts[idx];
> > + if (!ctx.pf || ctx.pf->ctype !=
> > + CONTEXT_TYPE_FLOW)
> > continue;
>
> When the context is 'CONTEXT_TYPE_SHARED_ACTION', who destroys it?
Destroy request is optional, I didn't add a support to destroy something here:
1 options here is to save all the flows assigned to the age shared action inside the shared action context and destroy all of them + the shared aged action.
It can be step 2 later.
>
> > - flow_id = pf->id;
> > + flow_id = ctx.pf->id;
> > ret = port_flow_destroy(port_id, 1, &flow_id);
> > if (!ret)
> > total++;
> > }
> > - printf("%d flows be destroyed\n", total);
> > + printf("%d flows destroyed\n", total);
> > }
> > free(contexts);
> > }
> > diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h index
> > 519d551..92aaa19 100644
> > --- a/app/test-pmd/testpmd.h
> > +++ b/app/test-pmd/testpmd.h
> > @@ -143,8 +143,14 @@ struct fwd_stream {
> > struct pkt_burst_stats tx_burst_stats;
> > };
> >
> > +enum testpmd_context_type {
> > + CONTEXT_TYPE_FLOW,
> > + CONTEXT_TYPE_SHARED_ACTION,
> > +};
> > +
>
> The enum prefix is too generic, 'CONTEXT_TYPE_', what do you think clarifying
> what context we are talking about?
enum flow_age_action_context_type {
FLOW_AGE_ACTION_CTX_FLOW,
FLOW_AGE_ACTION_CTX_SHARED_ACTION,
}
?
>
> > /** Descriptor for a single flow. */
> > struct port_flow {
> > + enum testpmd_context_type ctype; /**< Context type. */
> > struct port_flow *next; /**< Next flow in list. */
> > struct port_flow *tmp; /**< Temporary linking. */
> > uint32_t id; /**< Flow rule ID. */ @@ -155,6 +161,7 @@ struct
> > port_flow {
> >
> > /* Descriptor for shared action */
> > struct port_shared_action {
> > + enum testpmd_context_type ctype; /**< Context type. */
> > struct port_shared_action *next; /**< Next flow in list. */
> > uint32_t id; /**< Shared action ID. */
> > enum rte_flow_action_type type; /**< Action type. */
> >
What do you think about changing the rte_flow_get_aged_flows API name to rte_flow_get_aged_contexts ?
Matan
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