mbox series

[bpf,0/4] libbpf: Fixes for ring buffer

Message ID 20221111092642.2333724-1-houtao@huaweicloud.com (mailing list archive)
Headers show
Series libbpf: Fixes for ring buffer | expand

Message

Hou Tao Nov. 11, 2022, 9:26 a.m. UTC 
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 check individual patch for details. And comments are always
welcome.

Hou Tao (4):
  libbpf: Adjust ring buffer size when probing ring buffer map
  libbpf: Handle size overflow for ringbuf mmap
  libbpf: Handle size overflow for user ringbuf mmap
  libbpf: Check the validity of size in user_ring_buffer__reserve()

 tools/lib/bpf/libbpf.c          |  2 +-
 tools/lib/bpf/libbpf_internal.h |  2 ++
 tools/lib/bpf/libbpf_probes.c   |  2 +-
 tools/lib/bpf/ringbuf.c         | 26 ++++++++++++++++++++++----
 4 files changed, 26 insertions(+), 6 deletions(-)