DPDK patches and discussions
 help / color / mirror / Atom feed
From: Michal Krawczyk <mk@semihalf.com>
To: dev@dpdk.org
Cc: mw@semihalf.com, mba@semihalf.com, gtzalik@amazon.com,
	evgenys@amazon.com, igorch@amazon.com, stable@dpdk.org,
	Michal Krawczyk <mk@semihalf.com>
Subject: [dpdk-dev] [PATCH v2 03/29] net/ena/base: prevent allocation of 0-sized memory
Date: Wed,  1 Apr 2020 16:21:01 +0200	[thread overview]
Message-ID: <20200401142127.13715-4-mk@semihalf.com> (raw)
In-Reply-To: <20200401142127.13715-1-mk@semihalf.com>

From: Igor Chauskin <igorch@amazon.com>

rte_memzone_reserve() will reserve the biggest contiguous memzone
available if received 0 as size param.

Fixes: 9ba7981ec992 ("ena: add communication layer for DPDK")
Cc: stable@dpdk.org

Signed-off-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
---
 drivers/net/ena/base/ena_plat_dpdk.h | 29 ++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ena/base/ena_plat_dpdk.h b/drivers/net/ena/base/ena_plat_dpdk.h
index 192bbaefcf..793ba8a957 100644
--- a/drivers/net/ena/base/ena_plat_dpdk.h
+++ b/drivers/net/ena/base/ena_plat_dpdk.h
@@ -184,15 +184,18 @@ extern rte_atomic32_t ena_alloc_cnt;
 
 #define ENA_MEM_ALLOC_COHERENT(dmadev, size, virt, phys, handle)	\
 	do {								\
-		const struct rte_memzone *mz;				\
-		char z_name[RTE_MEMZONE_NAMESIZE];			\
+		const struct rte_memzone *mz = NULL;			\
 		ENA_TOUCH(dmadev); ENA_TOUCH(handle);			\
-		snprintf(z_name, sizeof(z_name),			\
+		if (size > 0) {						\
+			char z_name[RTE_MEMZONE_NAMESIZE];		\
+			snprintf(z_name, sizeof(z_name),		\
 			 "ena_alloc_%d",				\
 			 rte_atomic32_add_return(&ena_alloc_cnt, 1));	\
-		mz = rte_memzone_reserve(z_name, size, SOCKET_ID_ANY,	\
-				RTE_MEMZONE_IOVA_CONTIG);		\
-		handle = mz;						\
+			mz = rte_memzone_reserve(z_name, size,		\
+					SOCKET_ID_ANY,			\
+					RTE_MEMZONE_IOVA_CONTIG);	\
+			handle = mz;					\
+		}							\
 		if (mz == NULL) {					\
 			virt = NULL;					\
 			phys = 0;					\
@@ -210,15 +213,17 @@ extern rte_atomic32_t ena_alloc_cnt;
 #define ENA_MEM_ALLOC_COHERENT_NODE(					\
 	dmadev, size, virt, phys, mem_handle, node, dev_node)		\
 	do {								\
-		const struct rte_memzone *mz;				\
-		char z_name[RTE_MEMZONE_NAMESIZE];			\
+		const struct rte_memzone *mz = NULL;			\
 		ENA_TOUCH(dmadev); ENA_TOUCH(dev_node);			\
-		snprintf(z_name, sizeof(z_name),			\
+		if (size > 0) {						\
+			char z_name[RTE_MEMZONE_NAMESIZE];		\
+			snprintf(z_name, sizeof(z_name),		\
 			 "ena_alloc_%d",				\
-			 rte_atomic32_add_return(&ena_alloc_cnt, 1));	\
-		mz = rte_memzone_reserve(z_name, size, node,		\
+			 rte_atomic32_add_return(&ena_alloc_cnt, 1));   \
+			mz = rte_memzone_reserve(z_name, size, node,	\
 				RTE_MEMZONE_IOVA_CONTIG);		\
-		mem_handle = mz;					\
+			mem_handle = mz;				\
+		}							\
 		if (mz == NULL) {					\
 			virt = NULL;					\
 			phys = 0;					\
-- 
2.20.1


  parent reply	other threads:[~2020-04-01 14:22 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-01 14:20 [dpdk-dev] [PATCH v2 00/29] Update ENA driver to v2.1.0 Michal Krawczyk
2020-04-01 14:20 ` [dpdk-dev] [PATCH v2 01/29] net/ena: check if size of buffer is at least 1400B Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 02/29] net/ena/base: make allocation macros thread-safe Michal Krawczyk
2020-04-01 14:21 ` Michal Krawczyk [this message]
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 04/29] net/ena/base: set default hash key Michal Krawczyk
2020-04-02 12:36   ` Ferruh Yigit
2020-04-03 11:10     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 05/29] net/ena/base: rework interrupt moderation Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 06/29] net/ena/base: remove extra properties strings Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 07/29] net/ena/base: add accelerated LLQ mode Michal Krawczyk
2020-04-02 12:41   ` Ferruh Yigit
2020-04-03 11:15     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 08/29] net/ena/base: fix documentation of the functions Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 09/29] net/ena/base: fix indentation in cq polling Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 10/29] net/ena/base: add error logs when preparing Tx Michal Krawczyk
2020-04-02 12:53   ` Ferruh Yigit
2020-04-03 11:31     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 11/29] net/ena/base: use 48-bit memory addresses in ena_com Michal Krawczyk
2020-04-02 12:55   ` Ferruh Yigit
2020-04-03 12:14     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 12/29] net/ena/base: fix types for printing timestamps Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 13/29] net/ena/base: fix indentation of multiple defines Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 14/29] net/ena/base: update gen date and commit Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 15/29] net/ena: set IO ring size to the valid value Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 16/29] net/ena: refactor getting IO queues capabilities Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 17/29] net/ena: add support for large LLQ headers Michal Krawczyk
2020-04-02 13:02   ` Ferruh Yigit
2020-04-03 12:15     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 18/29] net/ena: remove memory barriers before doorbells Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 19/29] net/ena: add Tx drops statistic Michal Krawczyk
2020-04-02 13:05   ` Ferruh Yigit
2020-04-03 12:30     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 20/29] net/ena: disable meta caching Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 21/29] net/ena: refactor Rx path Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 22/29] net/ena: rework getting number of available descs Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 23/29] net/ena: limit refill threshold by fixed value Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 24/29] net/ena: use macros for ring idx operations Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 25/29] net/ena: refactor Tx path Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 26/29] net/ena: reuse 0 length Rx descriptor Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 27/29] doc: add notes on ENA usage on metal instances Michal Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 28/29] net/ena: update copyright date Michal Krawczyk
2020-04-02 15:51   ` Ferruh Yigit
2020-04-03 12:31     ` Michał Krawczyk
2020-04-01 14:21 ` [dpdk-dev] [PATCH v2 29/29] net/ena: update version of the driver to v2.1.0 Michal Krawczyk
2020-04-02 15:53   ` Ferruh Yigit
2020-04-03 12:32     ` Michał Krawczyk

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200401142127.13715-4-mk@semihalf.com \
    --to=mk@semihalf.com \
    --cc=dev@dpdk.org \
    --cc=evgenys@amazon.com \
    --cc=gtzalik@amazon.com \
    --cc=igorch@amazon.com \
    --cc=mba@semihalf.com \
    --cc=mw@semihalf.com \
    --cc=stable@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).