Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace.c Create Date:2022-07-28 12:00:58
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:tracing_trace_options_write

Proto:static ssize_t tracing_trace_options_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos)

Type:ssize_t

Parameter:

TypeParameterName
struct file *filp
const char __user *ubuf
size_tcnt
loff_t *ppos
4808  m = needed for tty driver, and maybe others
4809  tr = private
4813  If cnt >= size of buf Then Return -EINVAL
4816  If copy_from_user(buf, ubuf, cnt) Then Return -EFAULT
4819  buf[cnt] = 0
4821  ret = trace_set_options(tr, buf)
4822  If ret < 0 Then Return ret
4825  ppos += cnt
4827  Return cnt