函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\devmap.c Create Date:2022-07-27 14:39:55
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：__dev_map_flush is called from xdp_do_flush_map() which _must_ be signaled* from the driver before returning from its napi->poll() routine. The poll()* routine is called either from busy_poll context or net_rx_action signaled* from NET_RX_SOFTIRQ

函数原型：void __dev_map_flush(struct bpf_map *map)

返回类型：void

参数：

类型参数名称
struct bpf_map *map
407  dtab等于container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(map, structbpf_dtab, map)
408  flush_list等于this_cpu_ptr(flush_list)
411  _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
412  list_for_each_entry_safe - iterate over list of given type safe against removal of list entry*@pos: the type * to use as a loop cursor.*@n: another type * to use as temporary storage*@head: the head for your list.(bq, tmp, flush_list, flush_node)
413  bq_xmit_all(bq, doorbell signal consumer , true)
414  _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()