From: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
To: David Marchand <david.marchand@redhat.com>, dev@dpdk.org
Cc: mdr@ashroe.eu, dkozlyuk@oss.nvidia.com, thomas@monjalon.net,
Olivier Matz <olivier.matz@6wind.com>
Subject: Re: [dpdk-dev] [PATCH] mempool: enforce valid flags at creation
Date: Tue, 12 Oct 2021 10:49:53 +0300 [thread overview]
Message-ID: <fe6477a3-a3d8-ebc0-d88f-b7c36b717d0b@oktetlabs.ru> (raw)
In-Reply-To: <20211012072848.17741-1-david.marchand@redhat.com>
On 10/12/21 10:28 AM, David Marchand wrote:
> If we do not enforce valid flags are passed by an application, this
> application might face issues in the future when we add more flags.
Thanks. I'd even consider it as a bug and the fix to be
backported.
>
> Signed-off-by: David Marchand <david.marchand@redhat.com>
A nit below, other than that:
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
[snip]
> diff --git a/lib/mempool/rte_mempool.c b/lib/mempool/rte_mempool.c
> index c5f859ae71..a2a78125f4 100644
> --- a/lib/mempool/rte_mempool.c
> +++ b/lib/mempool/rte_mempool.c
> @@ -777,6 +777,13 @@ rte_mempool_cache_free(struct rte_mempool_cache *cache)
> rte_free(cache);
> }
>
> +#define MEMPOOL_KNOWN_FLAGS ( MEMPOOL_F_NO_SPREAD \
> + | MEMPOOL_F_NO_CACHE_ALIGN \
> + | MEMPOOL_F_SP_PUT \
> + | MEMPOOL_F_SC_GET \
> + | MEMPOOL_F_POOL_CREATED \
> + | MEMPOOL_F_NO_IOVA_CONTIG \
> + )
> /* create an empty mempool */
> struct rte_mempool *
> rte_mempool_create_empty(const char *name, unsigned n, unsigned elt_size,
> @@ -806,6 +813,12 @@ rte_mempool_create_empty(const char *name, unsigned n, unsigned elt_size,
> RTE_CACHE_LINE_MASK) != 0);
> #endif
>
> + /* enforce no unknown flag is passed by the application */
> + if ((flags & ~MEMPOOL_KNOWN_FLAGS) != 0) {
> + rte_errno = EINVAL;
> + return NULL;
> + }
> +
I think it is better to check arguments in parameters order.
So, it is a bit better to move the check to happen after
cache_size validation below.
> mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list);
>
> /* asked for zero items */
[snip]
next prev parent reply other threads:[~2021-10-12 7:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 7:28 David Marchand
2021-10-12 7:49 ` Andrew Rybchenko [this message]
2021-10-12 7:57 ` David Marchand
2021-10-14 19:16 ` David Marchand
2021-10-12 10:10 ` Kinsella, Ray
2021-10-14 19:29 ` [dpdk-dev] [PATCH v2] " David Marchand
2021-10-14 19:37 ` Stephen Hemminger
2021-10-15 7:02 ` Andrew Rybchenko
2021-10-15 8:26 ` David Marchand
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