函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\net\sock.h Create Date:2022-07-27 07:06:55
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：sk_dst_get

函数原型：static inline struct dst_entry *sk_dst_get(struct sock *sk)

返回类型：struct dst_entry

参数：

类型参数名称
struct sock *sk
1880  _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
1881  dst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().(sk_dst_cache)
1882  如果dst且非atomic_inc_not_zero - increment unless the number is zero*@v: pointer of type atomic_t* Atomically increments @v by 1, if @v is non-zero.* Returns true if the increment was done.则dst = NULL
1884  _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()
1885  返回:dst