From: Bruce Richardson <bruce.richardson@intel.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v4 2/2] ethdev: add sanity checks to functions
Date: Tue, 24 Nov 2015 14:56:31 +0000 [thread overview]
Message-ID: <20151124145630.GA19796@bricha3-MOBL3> (raw)
In-Reply-To: <20151117075309.7f05dc3a@samsung9>
On Tue, Nov 17, 2015 at 07:53:09AM -0800, Stephen Hemminger wrote:
> On Tue, 17 Nov 2015 12:21:07 +0000
> Bruce Richardson <bruce.richardson@intel.com> wrote:
>
> > The functions rte_eth_rx_queue_count and rte_eth_descriptor_done are
> > supported by very few PMDs. Therefore, it is best to check for support
> > for the functions in the ethdev library, so as to avoid run-time crashes
> > at run-time if the application goes to use those APIs. Similarly, the
> > port parameter should also be checked for validity.
> >
> > Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> >
> > ---
> > lib/librte_ether/rte_ethdev.h | 15 +++++++--------
> > 1 file changed, 7 insertions(+), 8 deletions(-)
> >
> > diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
> > index a00cd46..028be59 100644
> > --- a/lib/librte_ether/rte_ethdev.h
> > +++ b/lib/librte_ether/rte_ethdev.h
> > @@ -2533,16 +2533,16 @@ rte_eth_rx_burst(uint8_t port_id, uint16_t queue_id,
> > * @param queue_id
> > * The queue id on the specific port.
> > * @return
> > - * The number of used descriptors in the specific queue.
> > + * The number of used descriptors in the specific queue, or:
> > + * (-EINVAL) if *port_id* is invalid
> > + * (-ENOTSUP) if the device does not support this function
> > */
> > -static inline uint32_t
> > +static inline int
> > rte_eth_rx_queue_count(uint8_t port_id, uint16_t queue_id)
> > {
> > struct rte_eth_dev *dev = &rte_eth_devices[port_id];
> > -#ifdef RTE_LIBRTE_ETHDEV_DEBUG
> > - RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, 0);
> > - RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_queue_count, 0);
> > -#endif
> > + RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
> > + RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_queue_count, -ENOTSUP);
> > return (*dev->dev_ops->rx_queue_count)(dev, queue_id);
> > }
> >
> > @@ -2559,15 +2559,14 @@ rte_eth_rx_queue_count(uint8_t port_id, uint16_t queue_id)
> > * - (1) if the specific DD bit is set.
> > * - (0) if the specific DD bit is not set.
> > * - (-ENODEV) if *port_id* invalid.
> > + * - (-ENOTSUP) if the device does not support this function
> > */
> > static inline int
> > rte_eth_rx_descriptor_done(uint8_t port_id, uint16_t queue_id, uint16_t offset)
> > {
> > struct rte_eth_dev *dev = &rte_eth_devices[port_id];
> > -#ifdef RTE_LIBRTE_ETHDEV_DEBUG
> > RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
> > RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->rx_descriptor_done, -ENOTSUP);
> > -#endif
> > return (*dev->dev_ops->rx_descriptor_done)( \
> > dev->data->rx_queues[queue_id], offset);
> > }
>
> This breaks ABI since older application built with debug will try
> and find the shared library entry for the routine.
Ok, so assuming we care about the ABI for debug builds, is it enough to just
push a patch with a deprecation notice for this for 2.2, or do I need to see about
doing a new patchset with the NEXT_ABI macros included in it? My preference is
obviously for the former.
/Bruce
next prev parent reply other threads:[~2015-11-24 14:56 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-12 11:28 [dpdk-dev] [PATCH 0/4] ethdev: Add checks for function support in driver Bruce Richardson
2015-06-12 11:28 ` [dpdk-dev] [PATCH 1/4] ethdev: rename macros to have RTE_ETH prefix Bruce Richardson
2015-06-12 11:28 ` [dpdk-dev] [PATCH 2/4] ethdev: move RTE_ETH_FPTR_OR_ERR macros to header Bruce Richardson
2015-06-12 11:28 ` [dpdk-dev] [PATCH 3/4] ethdev: remove duplicated debug functions Bruce Richardson
2015-06-12 11:28 ` [dpdk-dev] [PATCH 4/4] ethdev: check support for rx_queue_count and descriptor_done fns Bruce Richardson
2015-06-12 17:32 ` Roger B. Melton
2015-06-15 10:14 ` Bruce Richardson
2015-07-06 15:11 ` Thomas Monjalon
2015-07-26 20:44 ` Thomas Monjalon
2015-09-09 15:09 ` [dpdk-dev] [PATCH v2 0/4] ethdev: minor cleanup Bruce Richardson
2015-09-09 15:09 ` [dpdk-dev] [PATCH v2 1/4] ethdev: rename macros to have RTE_ETH prefix Bruce Richardson
2015-09-09 15:09 ` [dpdk-dev] [PATCH v2 2/4] ethdev: move error checking macros to header Bruce Richardson
2015-09-09 15:09 ` [dpdk-dev] [PATCH v2 3/4] ethdev: remove duplicated debug functions Bruce Richardson
2015-09-09 15:09 ` [dpdk-dev] [PATCH v2 4/4] ethdev: check driver support for functions Bruce Richardson
2015-09-28 10:23 ` [dpdk-dev] [PATCH v2 0/4] ethdev: minor cleanup Bruce Richardson
2015-11-03 1:11 ` Thomas Monjalon
2015-11-03 10:06 ` Bruce Richardson
2015-11-03 12:00 ` [dpdk-dev] [PATCH v3 " Bruce Richardson
2015-11-03 12:00 ` [dpdk-dev] [PATCH v3 1/4] ethdev: rename macros to have RTE_ETH prefix Bruce Richardson
2015-11-03 12:00 ` [dpdk-dev] [PATCH v3 2/4] ethdev: move error checking macros to header Bruce Richardson
2015-11-04 1:19 ` Thomas Monjalon
2015-11-04 10:24 ` Adrien Mazarguil
2015-11-04 14:10 ` Bruce Richardson
2015-11-04 15:25 ` Adrien Mazarguil
2015-11-04 18:39 ` Stephen Hemminger
2015-11-05 15:09 ` Adrien Mazarguil
2015-11-05 15:17 ` Bruce Richardson
2015-11-06 11:49 ` Bruce Richardson
2015-11-06 17:10 ` Bruce Richardson
2015-11-06 17:22 ` Bruce Richardson
2015-11-09 13:39 ` Adrien Mazarguil
2015-11-09 13:50 ` Adrien Mazarguil
2015-11-09 14:02 ` Richardson, Bruce
2015-11-10 10:31 ` Declan Doherty
2015-11-10 16:08 ` Adrien Mazarguil
2015-11-10 16:21 ` Richardson, Bruce
2015-11-10 17:12 ` Adrien Mazarguil
2015-11-11 10:51 ` Bruce Richardson
2015-11-03 12:00 ` [dpdk-dev] [PATCH v3 3/4] ethdev: remove duplicated debug functions Bruce Richardson
2015-11-03 12:00 ` [dpdk-dev] [PATCH v3 4/4] ethdev: check driver support for functions Bruce Richardson
2015-11-03 22:00 ` Stephen Hemminger
2015-11-04 14:15 ` Bruce Richardson
2015-11-17 12:21 ` [dpdk-dev] [PATCH v4 0/2] ethdev: debug code cleanup Bruce Richardson
2015-11-17 12:21 ` [dpdk-dev] [PATCH v4 1/2] ethdev: remove duplicated debug functions Bruce Richardson
2015-11-17 12:21 ` [dpdk-dev] [PATCH v4 2/2] ethdev: add sanity checks to functions Bruce Richardson
2015-11-17 15:53 ` Stephen Hemminger
2015-11-24 14:56 ` Bruce Richardson [this message]
2015-11-24 15:29 ` Thomas Monjalon
2015-11-24 15:45 ` Bruce Richardson
2015-11-24 15:48 ` Thomas Monjalon
2015-11-24 17:37 ` [dpdk-dev] [PATCH v5 0/2] ethdev: debug code cleanup Bruce Richardson
2015-11-24 17:37 ` [dpdk-dev] [PATCH v5 1/2] ethdev: remove duplicated debug functions Bruce Richardson
2015-11-25 18:14 ` Thomas Monjalon
2015-11-24 17:37 ` [dpdk-dev] [PATCH v5 2/2] ethdev: add sanity checks to functions Bruce Richardson
2015-11-25 18:21 ` [dpdk-dev] [PATCH v5 0/2] ethdev: debug code cleanup Thomas Monjalon
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