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From: Thomas Monjalon <thomas@monjalon.net>
To: Andrew Rybchenko <arybchenko@solarflare.com>
Cc: dev@dpdk.org, gaetan.rivet@6wind.com, ophirmu@mellanox.com,
	ferruh.yigit@intel.com
Subject: Re: [dpdk-dev] [PATCH 1/5] bus/vdev: add iteration filter on name
Date: Mon, 08 Oct 2018 09:47:27 +0200	[thread overview]
Message-ID: <3036779.UqIVyZ4pAr@xps> (raw)
In-Reply-To: <bba84945-d5c5-285c-1e01-fa849c20b721@solarflare.com>

08/10/2018 08:46, Andrew Rybchenko:
> On 10/8/18 1:25 AM, Thomas Monjalon wrote:
> > A virtual device can be matched with following syntax:
> > 	bus=vdev,name=X
> >
> > Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
> > ---
> >   drivers/bus/vdev/vdev_params.c | 21 ++++++++++++++++++---
> >   1 file changed, 18 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/bus/vdev/vdev_params.c b/drivers/bus/vdev/vdev_params.c
> > index da270f2ec..133998c3e 100644
> > --- a/drivers/bus/vdev/vdev_params.c
> > +++ b/drivers/bus/vdev/vdev_params.c
> > @@ -2,6 +2,8 @@
> >    * Copyright 2018 Gaëtan Rivet
> >    */
> >   
> > +#include <string.h>
> > +
> >   #include <rte_dev.h>
> >   #include <rte_bus.h>
> >   #include <rte_kvargs.h>
> > @@ -11,10 +13,12 @@
> >   #include "vdev_private.h"
> >   
> >   enum vdev_params {
> > +	RTE_VDEV_PARAM_NAME,
> >   	RTE_VDEV_PARAM_MAX,
> >   };
> >   
> >   static const char * const vdev_params_keys[] = {
> > +	[RTE_VDEV_PARAM_NAME] = "name",
> >   	[RTE_VDEV_PARAM_MAX] = NULL,
> >   };
> >   
> > @@ -22,11 +26,22 @@ static int
> >   vdev_dev_match(const struct rte_device *dev,
> >   	       const void *_kvlist)
> >   {
> > +	int ret;
> >   	const struct rte_kvargs *kvlist = _kvlist;
> > +	char *name;
> > +
> > +	/* cannot pass const dev->name to rte_kvargs_process() */
> > +	name = strdup(dev->name);
> > +	if (name == NULL)
> > +		return -ENOMEM; /* interpreted as no match */
> 
> It is strange to see -ENOMEM and -1 returned from the same function.
> rte_dev_cmp_t does not return negative errno. It just says match /
> no match (greater / smaller than 0 if ordering is possible).
> So, -ENOMEM is really confusing here. I think just -1 should be used.

Yes, OK.

> > +	ret = rte_kvargs_process(kvlist,
> > +		vdev_params_keys[RTE_VDEV_PARAM_NAME],
> > +		rte_kvargs_strcmp, name);
> > +	free(name);
> > +	if (ret != 0)
> > +		return -1;
> >   
> > -	(void) kvlist;
> > -	(void) dev;
> > -	return 0;
> > +	return ret;
> 
> I'm not sure that I understand why 'ret' is returned here
> instead of 0. Above check guarantees that ret==0.
> If you change it, it should be a good reason.

Right

Thanks for the review!

  reply	other threads:[~2018-10-08  7:47 UTC|newest]

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-07 22:25 [dpdk-dev] [PATCH 0/5] replace attach/detach functions Thomas Monjalon
2018-10-07 22:25 ` [dpdk-dev] [PATCH 1/5] bus/vdev: add iteration filter on name Thomas Monjalon
2018-10-08  6:46   ` Andrew Rybchenko
2018-10-08  7:47     ` Thomas Monjalon [this message]
2018-10-07 22:25 ` [dpdk-dev] [PATCH 2/5] ethdev: add an iterator to match some devargs input Thomas Monjalon
2018-10-08  7:06   ` Andrew Rybchenko
2018-10-08  7:58     ` Thomas Monjalon
2018-10-07 22:25 ` [dpdk-dev] [PATCH 3/5] ethdev: allow iterating with only class filter Thomas Monjalon
2018-10-08  7:20   ` Andrew Rybchenko
2018-10-08  8:07     ` Thomas Monjalon
2018-10-08  9:13       ` Andrew Rybchenko
2018-10-07 22:25 ` [dpdk-dev] [PATCH 4/5] ethdev: remove deprecated attach/detach functions Thomas Monjalon
2018-10-08  7:28   ` Andrew Rybchenko
2018-10-08  8:09     ` Thomas Monjalon
2018-10-07 22:25 ` [dpdk-dev] [PATCH 5/5] eal: " Thomas Monjalon
2018-10-09  0:16 ` [dpdk-dev] [PATCH v2 0/6] replace " Thomas Monjalon
2018-10-09  0:16   ` [dpdk-dev] [PATCH v2 1/6] bus/vdev: add iteration filter on name Thomas Monjalon
2018-10-09  9:17     ` Andrew Rybchenko
2018-10-09  0:16   ` [dpdk-dev] [PATCH v2 2/6] ethdev: add iterator to match devargs input Thomas Monjalon
2018-10-09  9:31     ` Andrew Rybchenko
2018-10-09  9:49       ` Thomas Monjalon
2018-10-09  0:16   ` [dpdk-dev] [PATCH v2 3/6] ethdev: allow iterating with pure class filter Thomas Monjalon
2018-10-09  9:40     ` Andrew Rybchenko
2018-10-09  0:16   ` [dpdk-dev] [PATCH v2 4/6] doc: replace doxygen example in contribution guide Thomas Monjalon
2018-10-09  9:41     ` Andrew Rybchenko
2018-10-09  0:16   ` [dpdk-dev] [PATCH v2 5/6] ethdev: remove deprecated attach/detach functions Thomas Monjalon
2018-10-09  9:43     ` Andrew Rybchenko
2018-10-09  0:16   ` [dpdk-dev] [PATCH v2 6/6] eal: " Thomas Monjalon
2018-10-09  9:44     ` Andrew Rybchenko
2018-10-09 13:34 ` [dpdk-dev] [PATCH v3 0/6] replace " Thomas Monjalon
2018-10-09 13:34   ` [dpdk-dev] [PATCH v3 1/6] bus/vdev: add iteration filter on name Thomas Monjalon
2018-10-09 13:34   ` [dpdk-dev] [PATCH v3 2/6] ethdev: add iterator to match devargs input Thomas Monjalon
2018-10-09 14:17     ` Thomas Monjalon
2018-10-09 13:34   ` [dpdk-dev] [PATCH v3 3/6] ethdev: allow iterating with pure class filter Thomas Monjalon
2018-10-09 13:34   ` [dpdk-dev] [PATCH v3 4/6] doc: replace doxygen example in contribution guide Thomas Monjalon
2018-10-09 13:34   ` [dpdk-dev] [PATCH v3 5/6] ethdev: remove deprecated attach/detach functions Thomas Monjalon
2018-10-09 13:34   ` [dpdk-dev] [PATCH v3 6/6] eal: " Thomas Monjalon
2018-10-09 22:33 ` [dpdk-dev] [PATCH v4 0/6] replace " Thomas Monjalon
2018-10-09 22:33   ` [dpdk-dev] [PATCH v4 1/6] bus/vdev: add iteration filter on name Thomas Monjalon
2018-10-09 22:33   ` [dpdk-dev] [PATCH v4 2/6] ethdev: add iterator to match devargs input Thomas Monjalon
2018-10-16 10:58     ` Ferruh Yigit
2018-10-16 12:06       ` Thomas Monjalon
2018-10-09 22:33   ` [dpdk-dev] [PATCH v4 3/6] ethdev: allow iterating with pure class filter Thomas Monjalon
2018-10-09 22:33   ` [dpdk-dev] [PATCH v4 4/6] doc: replace doxygen example in contribution guide Thomas Monjalon
2018-10-09 22:33   ` [dpdk-dev] [PATCH v4 5/6] ethdev: remove deprecated attach/detach functions Thomas Monjalon
2018-10-16 11:03     ` Ferruh Yigit
2018-10-16 12:12       ` Thomas Monjalon
2018-10-09 22:33   ` [dpdk-dev] [PATCH v4 6/6] eal: " Thomas Monjalon
2018-10-18  1:35 ` [dpdk-dev] [PATCH v5 0/7] replace " Thomas Monjalon
2018-10-18  1:35   ` [dpdk-dev] [PATCH v5 1/7] bus/vdev: add iteration filter on name Thomas Monjalon
2018-10-18  1:35   ` [dpdk-dev] [PATCH v5 2/7] ethdev: add iterator to match devargs input Thomas Monjalon
2018-10-18  1:35   ` [dpdk-dev] [PATCH v5 3/7] ethdev: allow iterating with pure class filter Thomas Monjalon
2018-10-18  1:35   ` [dpdk-dev] [PATCH v5 4/7] doc: replace doxygen example in contribution guide Thomas Monjalon
2018-10-18  1:35   ` [dpdk-dev] [PATCH v5 5/7] ethdev: remove deprecated attach/detach functions Thomas Monjalon
2018-10-18  1:35   ` [dpdk-dev] [PATCH v5 6/7] eal: " Thomas Monjalon
2018-10-18  1:35   ` [dpdk-dev] [PATCH v5 7/7] app/testpmd: check not detaching device twice Thomas Monjalon
2018-10-18  1:45     ` Thomas Monjalon
2018-10-22 12:31 ` [dpdk-dev] [PATCH v6 0/7] replace attach/detach functions Thomas Monjalon
2018-10-22 12:31   ` [dpdk-dev] [PATCH v6 1/7] bus/vdev: add iteration filter on name Thomas Monjalon
2018-10-22 12:31   ` [dpdk-dev] [PATCH v6 2/7] ethdev: add iterator to match devargs input Thomas Monjalon
2018-10-22 12:31   ` [dpdk-dev] [PATCH v6 3/7] ethdev: allow iterating with pure class filter Thomas Monjalon
2018-10-22 12:31   ` [dpdk-dev] [PATCH v6 4/7] doc: replace doxygen example in contribution guide Thomas Monjalon
2018-10-22 12:31   ` [dpdk-dev] [PATCH v6 5/7] ethdev: remove deprecated attach/detach functions Thomas Monjalon
2018-10-22 12:31   ` [dpdk-dev] [PATCH v6 6/7] eal: " Thomas Monjalon
2018-10-22 12:31   ` [dpdk-dev] [PATCH v6 7/7] app/testpmd: check not detaching device twice Thomas Monjalon
2018-10-22 15:11   ` [dpdk-dev] [PATCH v6 0/7] replace attach/detach functions Iremonger, Bernard
2018-10-22 15:38     ` Thomas Monjalon
2018-10-23  8:28 ` [dpdk-dev] [PATCH v7 " Thomas Monjalon
2018-10-23  8:28   ` [dpdk-dev] [PATCH v7 1/7] bus/vdev: add iteration filter on name Thomas Monjalon
2018-10-23  8:28   ` [dpdk-dev] [PATCH v7 2/7] ethdev: add iterator to match devargs input Thomas Monjalon
2018-10-23  8:28   ` [dpdk-dev] [PATCH v7 3/7] ethdev: allow iterating with pure class filter Thomas Monjalon
2018-10-23  8:28   ` [dpdk-dev] [PATCH v7 4/7] doc: replace doxygen example in contribution guide Thomas Monjalon
2018-10-23  8:28   ` [dpdk-dev] [PATCH v7 5/7] ethdev: remove deprecated attach/detach functions Thomas Monjalon
2018-10-23  8:28   ` [dpdk-dev] [PATCH v7 6/7] eal: " Thomas Monjalon
2018-10-23  8:28   ` [dpdk-dev] [PATCH v7 7/7] app/testpmd: check not detaching device twice Thomas Monjalon
2018-10-23 10:01     ` Iremonger, Bernard
2018-10-23 12:03       ` Thomas Monjalon
2018-10-23 12:13         ` Thomas Monjalon
2018-10-23 12:37           ` Thomas Monjalon
2018-10-23 14:06             ` Ferruh Yigit
2018-10-23 12:39           ` Iremonger, Bernard
2018-10-23 14:06   ` [dpdk-dev] [PATCH v7 0/7] replace attach/detach functions Ferruh Yigit

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