函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\trace\trace_events.c Create Date:2022-07-27 13:27:15
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：ftrace_event_set_pid_open

函数原型：static int ftrace_event_set_pid_open(struct inode *inode, struct file *file)

返回类型：int

参数：

类型参数名称
struct inode *inode
struct file *file
1849  seq_ops等于show_set_pid_seq_ops
1850  tr等于s or device private pointer
1853  ret等于tracing_check_open_get_tr(tr)
1854  如果ret则返回:ret
1857  如果f_mode按位与le is open for writing 且f_flags按位与O_TRUNC则ftrace_clear_event_pids(tr)
1861  ret等于ftrace_event_open(inode, file, seq_ops)
1862  如果ret小于0则race_array_put - Decrement the reference counter for this trace array.* NOTE: Use this when we no longer need the trace array returned by* trace_array_get_by_name(). This ensures the trace array can be later* destroyed.
1864  返回:ret