diff mbox

[dpdk-dev,v3,2/7] ethdev: fix used portid allocation

Message ID 1516293317-30748-3-git-send-email-matan@mellanox.com (mailing list archive)
State Superseded, archived
Delegated to: Ferruh Yigit
Headers

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation fail apply patch file failure

Commit Message

Matan Azrad Jan. 18, 2018, 4:35 p.m. UTC 
  rte_eth_dev_find_free_port() found a free port by state checking.
The state field are in local process memory, so other DPDK processes
may get the same port ID because their local states may be different.

Replace the state checking by the ethdev port name checking,
so, if the name is an empty string the port ID will be detected as
unused.

Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple process model")
Cc: stable@dpdk.org

Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Signed-off-by: Matan Azrad <matan@mellanox.com>
---
 lib/librte_ether/rte_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Thomas Monjalon Jan. 18, 2018, 5 p.m. UTC | #1 
18/01/2018 17:35, Matan Azrad:
> rte_eth_dev_find_free_port() found a free port by state checking.
> The state field are in local process memory, so other DPDK processes
> may get the same port ID because their local states may be different.
> 
> Replace the state checking by the ethdev port name checking,
> so, if the name is an empty string the port ID will be detected as
> unused.
> 
> Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple process model")
> Cc: stable@dpdk.org
> 
> Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Signed-off-by: Matan Azrad <matan@mellanox.com>

Acked-by: Thomas Monjalon <thomas@monjalon.net>
Ananyev, Konstantin Jan. 19, 2018, 12:40 p.m. UTC | #2 
> -----Original Message-----
> From: Matan Azrad [mailto:matan@mellanox.com]
> Sent: Thursday, January 18, 2018 4:35 PM
> To: Thomas Monjalon <thomas@monjalon.net>; Gaetan Rivet <gaetan.rivet@6wind.com>; Wu, Jingjing <jingjing.wu@intel.com>
> Cc: dev@dpdk.org; Neil Horman <nhorman@tuxdriver.com>; Richardson, Bruce <bruce.richardson@intel.com>; Ananyev, Konstantin
> <konstantin.ananyev@intel.com>; stable@dpdk.org
> Subject: [PATCH v3 2/7] ethdev: fix used portid allocation
> 
> rte_eth_dev_find_free_port() found a free port by state checking.
> The state field are in local process memory, so other DPDK processes
> may get the same port ID because their local states may be different.
> 
> Replace the state checking by the ethdev port name checking,
> so, if the name is an empty string the port ID will be detected as
> unused.
> 
> Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple process model")
> Cc: stable@dpdk.org
> 
> Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Signed-off-by: Matan Azrad <matan@mellanox.com>
> ---
>  lib/librte_ether/rte_ethdev.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index 156231c..5d87f72 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -164,7 +164,7 @@ struct rte_eth_dev *
>  	unsigned i;
> 
>  	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
> -		if (rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED)
> +		if (rte_eth_dev_share_data->data[i].name[0] == '\0')

I know it is not really necessary, but I'd keep both (just in case):
if (rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED) && rte_eth_dev_share_data->data[i].name[0] == '\0')

Aprart from that: Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

>  			return i;
>  	}
>  	return RTE_MAX_ETHPORTS;
> --
> 1.8.3.1
Matan Azrad Jan. 20, 2018, 4:48 p.m. UTC | #3 
Hi Konstantin

From: Ananyev, Konstantin, Friday, January 19, 2018 2:40 PM
> > -----Original Message-----
> > From: Matan Azrad [mailto:matan@mellanox.com]
> > Sent: Thursday, January 18, 2018 4:35 PM
> > To: Thomas Monjalon <thomas@monjalon.net>; Gaetan Rivet
> > <gaetan.rivet@6wind.com>; Wu, Jingjing <jingjing.wu@intel.com>
> > Cc: dev@dpdk.org; Neil Horman <nhorman@tuxdriver.com>; Richardson,
> > Bruce <bruce.richardson@intel.com>; Ananyev, Konstantin
> > <konstantin.ananyev@intel.com>; stable@dpdk.org
> > Subject: [PATCH v3 2/7] ethdev: fix used portid allocation
> >
> > rte_eth_dev_find_free_port() found a free port by state checking.
> > The state field are in local process memory, so other DPDK processes
> > may get the same port ID because their local states may be different.
> >
> > Replace the state checking by the ethdev port name checking, so, if
> > the name is an empty string the port ID will be detected as unused.
> >
> > Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple
> > process model")
> > Cc: stable@dpdk.org
> >
> > Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> > Signed-off-by: Matan Azrad <matan@mellanox.com>
> > ---
> >  lib/librte_ether/rte_ethdev.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/lib/librte_ether/rte_ethdev.c
> > b/lib/librte_ether/rte_ethdev.c index 156231c..5d87f72 100644
> > --- a/lib/librte_ether/rte_ethdev.c
> > +++ b/lib/librte_ether/rte_ethdev.c
> > @@ -164,7 +164,7 @@ struct rte_eth_dev *
> >  	unsigned i;
> >
> >  	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
> > -		if (rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED)
> > +		if (rte_eth_dev_share_data->data[i].name[0] == '\0')
> 
> I know it is not really necessary, but I'd keep both (just in case):
> if (rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED) &&
> rte_eth_dev_share_data->data[i].name[0] == '\0')
> 
Since, as you, I don't think it is necessary, searched again and didn't find reason to that,
What's about 
RTE_ASSERT(rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED);
 Instead?

> Aprart from that: Acked-by: Konstantin Ananyev
> <konstantin.ananyev@intel.com>
> 
> >  			return i;
> >  	}
> >  	return RTE_MAX_ETHPORTS;
> > --
> > 1.8.3.1
Ananyev, Konstantin Jan. 20, 2018, 5:26 p.m. UTC | #4 
Hi Matan,

> 
> Hi Konstantin
> 
> From: Ananyev, Konstantin, Friday, January 19, 2018 2:40 PM
> > > -----Original Message-----
> > > From: Matan Azrad [mailto:matan@mellanox.com]
> > > Sent: Thursday, January 18, 2018 4:35 PM
> > > To: Thomas Monjalon <thomas@monjalon.net>; Gaetan Rivet
> > > <gaetan.rivet@6wind.com>; Wu, Jingjing <jingjing.wu@intel.com>
> > > Cc: dev@dpdk.org; Neil Horman <nhorman@tuxdriver.com>; Richardson,
> > > Bruce <bruce.richardson@intel.com>; Ananyev, Konstantin
> > > <konstantin.ananyev@intel.com>; stable@dpdk.org
> > > Subject: [PATCH v3 2/7] ethdev: fix used portid allocation
> > >
> > > rte_eth_dev_find_free_port() found a free port by state checking.
> > > The state field are in local process memory, so other DPDK processes
> > > may get the same port ID because their local states may be different.
> > >
> > > Replace the state checking by the ethdev port name checking, so, if
> > > the name is an empty string the port ID will be detected as unused.
> > >
> > > Fixes: d948f596fee2 ("ethdev: fix port data mismatched in multiple
> > > process model")
> > > Cc: stable@dpdk.org
> > >
> > > Suggested-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> > > Signed-off-by: Matan Azrad <matan@mellanox.com>
> > > ---
> > >  lib/librte_ether/rte_ethdev.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/lib/librte_ether/rte_ethdev.c
> > > b/lib/librte_ether/rte_ethdev.c index 156231c..5d87f72 100644
> > > --- a/lib/librte_ether/rte_ethdev.c
> > > +++ b/lib/librte_ether/rte_ethdev.c
> > > @@ -164,7 +164,7 @@ struct rte_eth_dev *
> > >  	unsigned i;
> > >
> > >  	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
> > > -		if (rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED)
> > > +		if (rte_eth_dev_share_data->data[i].name[0] == '\0')
> >
> > I know it is not really necessary, but I'd keep both (just in case):
> > if (rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED) &&
> > rte_eth_dev_share_data->data[i].name[0] == '\0')
> >
> Since, as you, I don't think it is necessary, searched again and didn't find reason to that,
> What's about
> RTE_ASSERT(rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED);
>  Instead?

Sounds ok to me.
Konstantin

> 
> > Aprart from that: Acked-by: Konstantin Ananyev
> > <konstantin.ananyev@intel.com>
> >
> > >  			return i;
> > >  	}
> > >  	return RTE_MAX_ETHPORTS;
> > > --
> > > 1.8.3.1
diff mbox

Patch

diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 156231c..5d87f72 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -164,7 +164,7 @@  struct rte_eth_dev *
 	unsigned i;
 
 	for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
-		if (rte_eth_devices[i].state == RTE_ETH_DEV_UNUSED)
+		if (rte_eth_dev_share_data->data[i].name[0] == '\0')
 			return i;
 	}
 	return RTE_MAX_ETHPORTS;