[ovs-dev] [PATCH V4 2/9] compat: Fix up changes to inet frags in 5.1+
Greg Rose
gvrose8192 at gmail.com
Fri Mar 6 22:37:14 UTC 2020
Since Linux kernel release 5.1 the fragments field of the inet_frag_queue
structure is removed and now only the rb_fragments structure with an
rb_node pointer is used for both ipv4 and ipv6. In addition, the
atomic_sub and atomic_add functions are replaced with their
equivalent long counterparts.
Acked-by: Yi-Hung Wei <yihung.wei at gmail.com>
Signed-off-by: Greg Rose <gvrose8192 at gmail.com>
---
V3 - Use HAVE_CORRECT_MRU_HANDLING instead of less reliable kernel
version check for compile time handling of the rb_fragments
change.
---
acinclude.m4 | 2 ++
datapath/linux/compat/include/net/inet_frag.h | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/acinclude.m4 b/acinclude.m4
index 03d3484..3a555ad 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1048,6 +1048,8 @@ AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
[OVS_DEFINE([HAVE_RBTREE_RB_LINK_NODE_RCU])])
OVS_GREP_IFELSE([$KSRC/include/net/dst_ops.h], [bool confirm_neigh],
[OVS_DEFINE([HAVE_DST_OPS_CONFIRM_NEIGH])])
+ OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [fqdir],
+ [OVS_DEFINE([HAVE_INET_FRAG_FQDIR])])
if cmp -s datapath/linux/kcompat.h.new \
datapath/linux/kcompat.h >/dev/null 2>&1; then
diff --git a/datapath/linux/compat/include/net/inet_frag.h b/datapath/linux/compat/include/net/inet_frag.h
index 124c8be..00784da 100644
--- a/datapath/linux/compat/include/net/inet_frag.h
+++ b/datapath/linux/compat/include/net/inet_frag.h
@@ -12,6 +12,7 @@
#define qp_flags(qp) (qp->q.flags)
#endif
+#ifndef HAVE_CORRECT_MRU_HANDLING
#ifndef HAVE_INET_FRAG_EVICTING
static inline bool inet_frag_evicting(struct inet_frag_queue *q)
{
@@ -22,6 +23,7 @@ static inline bool inet_frag_evicting(struct inet_frag_queue *q)
#endif /* HAVE_INET_FRAG_QUEUE_WITH_LIST_EVICTOR */
}
#endif /* HAVE_INET_FRAG_EVICTING */
+#endif /* HAVE_CORRECT_MRU_HANDLING */
/* Upstream commit 3fd588eb90bf ("inet: frag: remove lru list") dropped this
* function, but we call it from our compat code. Provide a noop version. */
@@ -29,6 +31,10 @@ static inline bool inet_frag_evicting(struct inet_frag_queue *q)
#define inet_frag_lru_move(q)
#endif
+#ifdef HAVE_INET_FRAG_FQDIR
+#define netns_frags fqdir
+#endif
+
#ifndef HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS
#ifdef HAVE_FRAG_PERCPU_COUNTER_BATCH
static inline void rpl_sub_frag_mem_limit(struct netns_frags *nf, int i)
@@ -45,13 +51,21 @@ static inline void rpl_add_frag_mem_limit(struct netns_frags *nf, int i)
#else /* !frag_percpu_counter_batch */
static inline void rpl_sub_frag_mem_limit(struct netns_frags *nf, int i)
{
+#ifdef HAVE_INET_FRAG_FQDIR
+ atomic_long_sub(i, &nf->mem);
+#else
atomic_sub(i, &nf->mem);
+#endif
}
#define sub_frag_mem_limit rpl_sub_frag_mem_limit
static inline void rpl_add_frag_mem_limit(struct netns_frags *nf, int i)
{
+#ifdef HAVE_INET_FRAG_FQDIR
+ atomic_long_add(i, &nf->mem);
+#else
atomic_add(i, &nf->mem);
+#endif
}
#define add_frag_mem_limit rpl_add_frag_mem_limit
#endif /* frag_percpu_counter_batch */
--
1.8.3.1
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