函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\reuseport_array.c Create Date:2022-07-27 14:48:11
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：reuseport_array_free

函数原型：static void reuseport_array_free(struct bpf_map *map)

返回类型：void

参数：

类型参数名称
struct bpf_map *map
95  array等于reuseport_array(map)
99  Wait for a grace period to elapse. But it is illegal to invoke* synchronize_rcu() from within an RCU read-side critical section.* Therefore, any legal call to synchronize_rcu() is a quiescent
126  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
127  以i小于max_entries循环
128  sk等于cu_dereference() - fetch RCU-protected pointer for dereferencing*@p: The pointer to read, prior to dereferencing* This is a simple wrapper around rcu_dereference_check().(ptrs[i])
129  如果sk则
130  write_lock_bh( & sk_callback_lock)
136  sk_user_data = NULL
137  write_unlock_bh( & sk_callback_lock)
138  RCU_INIT_POINTER() - initialize an RCU protected pointer*@p: The pointer to be initialized.*@v: The value to initialized the pointer to.* Initialize an RCU-protected pointer in special cases where readers(ptrs[i], NULL)
141  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
147  bpf_map_area_free(array)