[2/3] backports: Adapt to changes to skb_get_hash_perturb()
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Message ID 20191116183623.8858-2-hauke@hauke-m.de
State New
Headers show
Series
  • [1/3] backports: Add return value to backport_pci_disable_link_state()
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Commit Message

Hauke Mehrtens Nov. 16, 2019, 6:36 p.m. UTC
The skb_get_hash_perturb() function now takes a siphash_key_t instead of
an u32. This was changed in commit 55667441c84f ("net/flow_dissector:
switch to siphash"). Use the correct type in the fq header file
depending on the kernel version.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---
 patches/0091-fq-no-siphash_key_t/fq.patch | 36 +++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 patches/0091-fq-no-siphash_key_t/fq.patch

Comments

Johannes Berg Nov. 19, 2019, 9 a.m. UTC | #1
On Sat, 2019-11-16 at 19:36 +0100, Hauke Mehrtens wrote:
> The skb_get_hash_perturb() function now takes a siphash_key_t instead of
> an u32. This was changed in commit 55667441c84f ("net/flow_dissector:
> switch to siphash"). Use the correct type in the fq header file
> depending on the kernel version.


Thanks, I was trying to figure this out recently but hadn't gotten that
far...

johannes

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Patch
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diff --git a/patches/0091-fq-no-siphash_key_t/fq.patch b/patches/0091-fq-no-siphash_key_t/fq.patch
new file mode 100644
index 00000000..95c28a19
--- /dev/null
+++ b/patches/0091-fq-no-siphash_key_t/fq.patch
@@ -0,0 +1,36 @@ 
+--- a/include/net/fq.h
++++ b/include/net/fq.h
+@@ -69,7 +69,15 @@ struct fq {
+ 	struct list_head backlogs;
+ 	spinlock_t lock;
+ 	u32 flows_cnt;
++#if LINUX_VERSION_IS_GEQ(5,3,10) || \
++    LINUX_VERSION_IN_RANGE(4,19,83, 4,20,0) || \
++    LINUX_VERSION_IN_RANGE(4,14,153, 4,15,0) || \
++    LINUX_VERSION_IN_RANGE(4,9,200, 4,10,0) || \
++    LINUX_VERSION_IN_RANGE(4,4,200, 4,5,0)
+ 	siphash_key_t	perturbation;
++#else
++	u32 perturbation;
++#endif
+ 	u32 limit;
+ 	u32 memory_limit;
+ 	u32 memory_usage;
+--- a/include/net/fq_impl.h
++++ b/include/net/fq_impl.h
+@@ -108,7 +108,15 @@ begin:
+ 
+ static u32 fq_flow_idx(struct fq *fq, struct sk_buff *skb)
+ {
++#if LINUX_VERSION_IS_GEQ(5,3,10) || \
++    LINUX_VERSION_IN_RANGE(4,19,83, 4,20,0) || \
++    LINUX_VERSION_IN_RANGE(4,14,153, 4,15,0) || \
++    LINUX_VERSION_IN_RANGE(4,9,200, 4,10,0) || \
++    LINUX_VERSION_IN_RANGE(4,4,200, 4,5,0)
+ 	u32 hash = skb_get_hash_perturb(skb, &fq->perturbation);
++#else
++	u32 hash = skb_get_hash_perturb(skb, fq->perturbation);
++#endif
+ 
+ 	return reciprocal_scale(hash, fq->flows_cnt);
+ }