From: Olivier Matz <olivier.matz@6wind.com>
To: dev@dpdk.org
Cc: bruce.richardson@intel.com
Subject: [dpdk-dev] [PATCH 0/4] fix lpm and hash creation
Date: Wed, 30 Mar 2016 17:30:23 +0200 [thread overview]
Message-ID: <1459351827-3346-1-git-send-email-olivier.matz@6wind.com> (raw)
In-Reply-To: <1458044745-32764-1-git-send-email-olivier.matz@6wind.com>
Seen while trying to fix the func_reentrancy autotest. The
series addresses several issues:
1/ Hash and lpm return a pointer to an existing object if the user requests the
creation with an already existing name. This look dangerous: when an object
is returned, the user does not know if it should be freed or not.
2/ There is a race condition in cuckoo_hash as the lock is not held in
rte_hash_create(). We could find some cases where NULL is returned when the
object already exists (ex: when rte_ring_create() fails).
3/ There is a race condition func_reentrancy that can fail even if the tested
API behaves correctly.
Changes since RFC:
- split the patch in 4 patches
- on error, set rte_errno to EEXIST when relevant
- fix locking in cuckoo_hash creation
Olivier Matz (4):
lpm: allocation of an existing object should fail
hash: allocation of an existing object should fail
hash: keep the list locked at creation
autotest: fix func reentrancy
app/test/test_func_reentrancy.c | 31 +++++++++++++++++++++----------
app/test/test_lpm6.c | 2 +-
lib/librte_hash/rte_cuckoo_hash.c | 18 +++++++++++++-----
lib/librte_hash/rte_fbk_hash.c | 5 ++++-
lib/librte_lpm/rte_lpm.c | 10 ++++++++--
lib/librte_lpm/rte_lpm6.c | 5 ++++-
6 files changed, 51 insertions(+), 20 deletions(-)
--
2.1.4
next prev parent reply other threads:[~2016-03-30 15:31 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-15 12:25 [dpdk-dev] [RFC] hash/lpm: return NULL if the object exists Olivier Matz
2016-03-25 10:32 ` Olivier Matz
2016-03-25 10:45 ` Bruce Richardson
2016-03-30 15:30 ` Olivier Matz [this message]
2016-03-30 15:30 ` [dpdk-dev] [PATCH 1/4] lpm: allocation of an existing object should fail Olivier Matz
2016-03-30 21:46 ` Stephen Hemminger
2016-03-31 7:35 ` Olivier Matz
2016-04-01 16:25 ` Olivier Matz
2016-03-31 10:55 ` Bruce Richardson
2016-03-30 15:30 ` [dpdk-dev] [PATCH 2/4] hash: " Olivier Matz
2016-03-30 15:30 ` [dpdk-dev] [PATCH 3/4] hash: keep the list locked at creation Olivier Matz
2016-03-30 15:30 ` [dpdk-dev] [PATCH 4/4] autotest: fix func reentrancy Olivier Matz
2016-03-31 7:35 ` [dpdk-dev] [PATCH 0/4] fix lpm and hash creation Olivier Matz
2016-04-05 7:35 ` [dpdk-dev] [PATCH v2 0/4] fix creation of duplicate lpm and hash Olivier Matz
2016-04-05 7:35 ` [dpdk-dev] [PATCH v2 1/4] lpm: allocation of an existing object should fail Olivier Matz
2016-04-05 7:35 ` [dpdk-dev] [PATCH v2 2/4] hash: " Olivier Matz
2016-04-05 7:35 ` [dpdk-dev] [PATCH v2 3/4] hash: keep the list locked at creation Olivier Matz
2016-04-05 11:05 ` De Lara Guarch, Pablo
2016-04-05 7:35 ` [dpdk-dev] [PATCH v2 4/4] autotest: fix func reentrancy Olivier Matz
2016-04-05 11:00 ` De Lara Guarch, Pablo
2016-04-05 11:53 ` [dpdk-dev] [PATCH v3 0/4] fix creation of duplicate lpm and hash Olivier Matz
2016-04-05 11:53 ` [dpdk-dev] [PATCH v3 1/4] lpm: allocation of an existing object should fail Olivier Matz
2016-04-05 11:53 ` [dpdk-dev] [PATCH v3 2/4] hash: " Olivier Matz
2016-04-05 11:53 ` [dpdk-dev] [PATCH v3 3/4] hash: keep the list locked at creation Olivier Matz
2016-04-05 11:53 ` [dpdk-dev] [PATCH v3 4/4] autotest: fix func reentrancy Olivier Matz
2016-04-05 15:51 ` [dpdk-dev] [PATCH v3 0/4] fix creation of duplicate lpm and hash Thomas Monjalon
2016-04-06 10:11 ` De Lara Guarch, Pablo
2016-04-06 10:32 ` De Lara Guarch, Pablo
2016-04-06 11:14 ` Olivier Matz
2016-04-06 11:20 ` De Lara Guarch, Pablo
2016-04-06 11:57 ` Olivier Matz
2016-04-06 13:27 ` [dpdk-dev] [PATCH v4 " Olivier Matz
2016-04-06 13:27 ` [dpdk-dev] [PATCH v4 1/4] lpm: allocation of an existing object should fail Olivier Matz
2016-04-06 13:27 ` [dpdk-dev] [PATCH v4 2/4] hash: " Olivier Matz
2016-04-06 13:28 ` [dpdk-dev] [PATCH v4 3/4] hash: keep the list locked at creation Olivier Matz
2016-04-06 13:28 ` [dpdk-dev] [PATCH v4 4/4] autotest: fix func reentrancy Olivier Matz
2016-04-06 15:31 ` [dpdk-dev] [PATCH v4 0/4] fix creation of duplicate lpm and hash Thomas Monjalon
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