io_grab_files

Name:io_grab_files

Proto:static int io_grab_files(struct io_kiocb *req)

Type:int

Parameter:

Type	Parameter	Name
struct io_kiocb *	req

3435

ret = -EBADF

3436

ctx = ctx

3438

_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

3439

spin_lock_irq( & inflight_lock)

3446

If Check whether the specified fd has an open file.(ring_fd) == ring_file Then

3447

list_add - add a new entry*@new: new entry to be added*@head: list head to add it after* Insert a new entry after the specified head.* This is good for implementing stacks.

3448

flags |= inflight list

3449

3450

ret = 0

3452

spin_unlock_irq( & inflight_lock)

3453

_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()

3455

Return ret

**Caller**
Name	Describe
__io_queue_sqe

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