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From 2eab63bff2624d154891c949bd815c1fe7082f60 Mon Sep 17 00:00:00 2001
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From: Tobias Jungel <tobias.jungel@bisdn.de>
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Date: Thu, 4 Aug 2016 10:01:43 +0200
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Subject: [PATCH 1/2] route/addr: address attributes based on object
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addr_id_attrs_get returned a fixed set of attributes for AF_INET. This
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leads to an invalid cache in case the default cache manager is used.
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The error was cause by nl_object_identical, which checkes the ce_mask
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of an object against the req_attrs. For route/addr objects the ce_mask
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may contain the ADDR_ATTR_PEER, but the addr_id_attrs_get always
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includes this attribute. Thus nl_object_identical fails always in case
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no peer exists, which is the default for local addresses.
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Fixes: 83e851ca9c842ccb6dae411d3fff9c7e9561269a
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https://github.com/thom311/libnl/pull/105
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Signed-off-by: Thomas Haller <thaller@redhat.com>
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(cherry picked from commit dfaba51b5b2b5ad7e3c4990c2af3f30acbe5f8d9)
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---
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lib/route/addr.c | 9 ++++++---
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1 file changed, 6 insertions(+), 3 deletions(-)
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diff --git a/lib/route/addr.c b/lib/route/addr.c
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index b699c64..7d3ff39 100644
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--- a/lib/route/addr.c
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+++ b/lib/route/addr.c
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@@ -467,12 +467,15 @@ static void addr_dump_stats(struct nl_object *obj, struct nl_dump_params *p)
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static uint32_t addr_id_attrs_get(struct nl_object *obj)
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{
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struct rtnl_addr *addr = (struct rtnl_addr *)obj;
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+ uint32_t rv;
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switch (addr->a_family) {
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case AF_INET:
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- return (ADDR_ATTR_FAMILY | ADDR_ATTR_IFINDEX |
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- ADDR_ATTR_LOCAL | ADDR_ATTR_PREFIXLEN |
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- ADDR_ATTR_PEER);
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+ rv = (ADDR_ATTR_FAMILY | ADDR_ATTR_IFINDEX |
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+ ADDR_ATTR_LOCAL | ADDR_ATTR_PREFIXLEN);
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+ if (addr->a_peer)
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+ rv |= ADDR_ATTR_PEER;
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+ return rv;
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case AF_INET6:
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return (ADDR_ATTR_FAMILY | ADDR_ATTR_IFINDEX |
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ADDR_ATTR_LOCAL);
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--
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2.7.4
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From f2ac27c8a513eaf6b838796aacf2ec444a2c1227 Mon Sep 17 00:00:00 2001
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From: Thomas Haller <thaller@redhat.com>
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Date: Sun, 14 Aug 2016 11:05:48 +0200
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Subject: [PATCH 2/2] lib: capability NL_CAPABILITY_RTNL_ADDR_PEER_ID_FIX for
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ID comparison of v4 addresses
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The ID attributes for IPv4 addresses were broken which causes wrong
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nl_object_identical() and cache lookup.
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This capability shall indicate that the bug was fixed.
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Signed-off-by: Thomas Haller <thaller@redhat.com>
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(cherry picked from commit 99b1d8acf87bcb35efed49f412d54af682bf1738)
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---
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include/netlink/utils.h | 7 +++++++
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lib/utils.c | 2 +-
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2 files changed, 8 insertions(+), 1 deletion(-)
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diff --git a/include/netlink/utils.h b/include/netlink/utils.h
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index 3b10340..1115bb4 100644
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--- a/include/netlink/utils.h
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+++ b/include/netlink/utils.h
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@@ -217,6 +217,13 @@ enum {
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NL_CAPABILITY_VERSION_3_2_28 = 19,
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#define NL_CAPABILITY_VERSION_3_2_28 NL_CAPABILITY_VERSION_3_2_28
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+ /**
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+ * After NL_CAPABILITY_RTNL_ADDR_PEER_FIX, a follow up regression to lookup
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+ * IPv4 addresses in the cache was fixed (PR#105).
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+ */
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+ NL_CAPABILITY_RTNL_ADDR_PEER_ID_FIX = 20,
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+#define NL_CAPABILITY_RTNL_ADDR_PEER_ID_FIX NL_CAPABILITY_RTNL_ADDR_PEER_ID_FIX
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+
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__NL_CAPABILITY_MAX,
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NL_CAPABILITY_MAX = (__NL_CAPABILITY_MAX - 1),
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#define NL_CAPABILITY_MAX NL_CAPABILITY_MAX
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diff --git a/lib/utils.c b/lib/utils.c
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index 3399c03..0f2a252 100644
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--- a/lib/utils.c
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+++ b/lib/utils.c
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@@ -1164,7 +1164,7 @@ int nl_has_capability (int capability)
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NL_CAPABILITY_XFRM_SA_KEY_SIZE,
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NL_CAPABILITY_RTNL_ADDR_PEER_FIX,
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NL_CAPABILITY_VERSION_3_2_28,
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- 0,
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+ NL_CAPABILITY_RTNL_ADDR_PEER_ID_FIX,
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0,
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0,
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0,
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--
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2.7.4
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