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bpf: Call maybe_wait_bpf_programs() only once for generic_map_update_batch()

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Just like commit 9087c6ff8d ("bpf: Call maybe_wait_bpf_programs() only
once from generic_map_delete_batch()"), there is also no need to call
maybe_wait_bpf_programs() for each update in batched update, so only
call it once in generic_map_update_batch().

Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20231208102355.2628918-3-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Hou Tao 2023-12-08 18:23:50 +08:00 committed by Alexei Starovoitov
parent c26f2a8901
commit 37ba5b59d6
1 changed files with 3 additions and 1 deletions
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4
kernel/bpf/syscall.c
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@ -203,7 +203,6 @@ static int bpf_map_update_value(struct bpf_map *map, struct file *map_file,
rcu_read_unlock();
}
bpf_enable_instrumentation();
maybe_wait_bpf_programs(map);
return err;
}
@ -1577,6 +1576,7 @@ static int map_update_elem(union bpf_attr *attr, bpfptr_t uattr)
}
err = bpf_map_update_value(map, f.file, key, value, attr->flags);
maybe_wait_bpf_programs(map);
kvfree(value);
free_key:
@ -1816,6 +1816,8 @@ int generic_map_update_batch(struct bpf_map *map, struct file *map_file,
kvfree(value);
kvfree(key);
maybe_wait_bpf_programs(map);
return err;
}