From: Hou Tao <houtao1@xxxxxxxxxx>
Hi,
The patch set aims to fix the problems found when inspecting the code
related with maybe_wait_bpf_programs().
Patch #1 removes unnecessary invocation of maybe_wait_bpf_programs().
Patch #2 calls maybe_wait_bpf_programs() only once for batched update.
Patch #3 adds the missed waiting when doing batched lookup_deletion on
htab of maps. Patch #4 does wait only if the update or deletion
operation succeeds. Patch #5 fixes the value of batch.count when memory
allocation fails. Patch #6 does the similar thing as patch #4, except it
fixes the problem for batched map operations. Patch #7 handles sleepable
BPF program in maybe_wait_bpf_programs(), but it doesn't handle the bpf
syscall from syscall program.
Please see individual patches for more details. Comments are always
welcome.
Hou Tao (7):
bpf: Remove unnecessary wait from bpf_map_copy_value()
bpf: Call maybe_wait_bpf_programs() only once for
generic_map_update_batch()
bpf: Add missed maybe_wait_bpf_programs() for htab of maps
bpf: Only call maybe_wait_bpf_programs() when map operation succeeds
bpf: Set uattr->batch.count as zero before batched update or deletion
bpf: Only call maybe_wait_bpf_programs() when at least one map
operation succeeds
bpf: Wait for sleepable BPF program in maybe_wait_bpf_programs()
include/linux/bpf.h | 14 +++++------
kernel/bpf/hashtab.c | 20 ++++++++-------
kernel/bpf/syscall.c | 60 +++++++++++++++++++++++++++++++-------------
3 files changed, 61 insertions(+), 33 deletions(-)
--
2.29.2
