Merge branch 'libbpf: Fixes for ring buffer'

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Hou Tao says:

====================

From: Hou Tao <houtao1@huawei.com>

Hi,

The patch set tries to fix the problems found when testing ringbuf by
using 4KB and 2GB size. Patch 1 fixes the probe of ring buffer map on
host with 64KB page (e.g., an ARM64 host). Patch 2 & 3 fix the overflow
of length when mmaping 2GB kernel ringbuf or user ringbuf on libbpf.
Patch 4 just reject the reservation with invalid size.

Please see individual patch for details. And comments are always
welcome.

Change Log:
v2:
 * patch 1: use page size instead of adjust_ringbuf_sz(4096) as main_entries (suggested by Stanislav)
 * patch 2 & 3: use "mmap_sz" instead of "ro_size/wr_size" as name of mmap length (From Andrii)
v1: https://lore.kernel.org/bpf/20221111092642.2333724-1-houtao@huaweicloud.com
====================

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

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This commit is contained in:

Andrii Nakryiko 2022-11-17 15:46:06 -08:00

parent 47df8a2f78 05c1558bfc

commit 6f04180ca6

2 changed files with 21 additions and 7 deletions

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2

tools/lib/bpf/libbpf_probes.c

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26

tools/lib/bpf/ringbuf.c

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