Hu Allain,
> -----Original Message-----
> From: Allain Legacy [mailto:allain.leg...@windriver.com]
> Sent: Tuesday, April 25, 2017 6:05 PM
> To: Ananyev, Konstantin <konstantin.anan...@intel.com>
> Cc: dev@dpdk.org; Osman, Dahir (Wind River) <dahir.os...@windriver.com>
> Subject: [PATCH] ip_frag: free mbufs on reassembly table destroy
>
> From: Dahir Osman <dahir.os...@windriver.com>
>
> The rte_ip_frag_table_destroy procedure simply releases the memory for the
> table without freeing the packet buffers that may be referenced in the hash
> table for in-flight or incomplete packet reassembly operations. To prevent
> leaked mbufs go through the list of fragments and free each one
> individually.
>
> Reported-by: Matt Peters <matt.pet...@windriver.com>
> Signed-off-by: Allain Legacy <allain.leg...@windriver.com>
> ---
> lib/librte_ip_frag/ip_frag_common.h | 20 ++++++++++++++++++++
> lib/librte_ip_frag/rte_ip_frag.h | 7 ++-----
> lib/librte_ip_frag/rte_ip_frag_common.c | 12 ++++++++++++
> lib/librte_ip_frag/rte_ipfrag_version.map | 7 +++++++
> 4 files changed, 41 insertions(+), 5 deletions(-)
>
> diff --git a/lib/librte_ip_frag/ip_frag_common.h
> b/lib/librte_ip_frag/ip_frag_common.h
> index 835e4f93f..9f5619651 100644
> --- a/lib/librte_ip_frag/ip_frag_common.h
> +++ b/lib/librte_ip_frag/ip_frag_common.h
> @@ -130,6 +130,26 @@ ip_frag_free(struct ip_frag_pkt *fp, struct
> rte_ip_frag_death_row *dr)
> dr->cnt = k;
> }
>
> +/* delete fragment's mbufs immediately instead of using death row */
> +static inline void
> +ip_frag_free_immediate(struct ip_frag_pkt *fp)
> +{
> + uint32_t i;
> +
> + for (i = 0; i < fp->last_idx; i++) {
> + if (fp->frags[i].mb != NULL) {
> + IP_FRAG_LOG(DEBUG, "%s:%d\n"
> + "mbuf: %p, tms: %" PRIu64", key: <%" PRIx64 ",
> %#x>\n",
> + __func__, __LINE__, fp->frags[i].mb, fp->start,
> + fp->key.src_dst[0], fp->key.id);
> + rte_pktmbuf_free(fp->frags[i].mb);
> + fp->frags[i].mb = NULL;
> + }
> + }
> +
> + fp->last_idx = 0;
> +}
> +
> /* if key is empty, mark key as in use */
> static inline void
> ip_frag_inuse(struct rte_ip_frag_tbl *tbl, const struct ip_frag_pkt *fp)
> diff --git a/lib/librte_ip_frag/rte_ip_frag.h
> b/lib/librte_ip_frag/rte_ip_frag.h
> index 6708906d3..ff16f4c52 100644
> --- a/lib/librte_ip_frag/rte_ip_frag.h
> +++ b/lib/librte_ip_frag/rte_ip_frag.h
> @@ -180,11 +180,8 @@ struct rte_ip_frag_tbl *
> rte_ip_frag_table_create(uint32_t bucket_num,
> * @param tbl
> * Fragmentation table to free.
> */
> -static inline void
> -rte_ip_frag_table_destroy(struct rte_ip_frag_tbl *tbl)
> -{
> - rte_free(tbl);
> -}
> +void
> +rte_ip_frag_table_destroy(struct rte_ip_frag_tbl *tbl);
>
> /**
> * This function implements the fragmentation of IPv6 packets.
> diff --git a/lib/librte_ip_frag/rte_ip_frag_common.c
> b/lib/librte_ip_frag/rte_ip_frag_common.c
> index 6176ff4e0..70964101c 100644
> --- a/lib/librte_ip_frag/rte_ip_frag_common.c
> +++ b/lib/librte_ip_frag/rte_ip_frag_common.c
> @@ -109,6 +109,18 @@ rte_ip_frag_table_create(uint32_t bucket_num, uint32_t
> bucket_entries,
> return tbl;
> }
>
> +/* delete fragmentation table */
> +void
> +rte_ip_frag_table_destroy(struct rte_ip_frag_tbl *tbl)
> +{
> + uint32_t i;
> +
> + for (i = 0; i < tbl->nb_entries; i++)
> + ip_frag_free_immediate(&tbl->pkt[i]);
Looks ok, just one thought: wouldn't it be better(faster) in most cases to
iterate over lru list?
I suppose usually we wouldn't have nearly all entries filled in.
Konstantin
> +
> + rte_free(tbl);
> +}
> +
> /* dump frag table statistics to file */
> void
> rte_ip_frag_table_statistics_dump(FILE *f, const struct rte_ip_frag_tbl *tbl)
> diff --git a/lib/librte_ip_frag/rte_ipfrag_version.map
> b/lib/librte_ip_frag/rte_ipfrag_version.map
> index 354fa0822..29e2cfea5 100644
> --- a/lib/librte_ip_frag/rte_ipfrag_version.map
> +++ b/lib/librte_ip_frag/rte_ipfrag_version.map
> @@ -11,3 +11,10 @@ DPDK_2.0 {
>
> local: *;
> };
> +
> +DPDK_17.05 {
> + global:
> +
> + rte_ip_frag_table_destroy;
> +
> +} DPDK_2.0;
> --
> 2.12.1
