Function report |
Source Code:fs\splice.c |
Create Date:2022-07-28 20:11:29 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:splice_pipe_to_pipe
Proto:static int splice_pipe_to_pipe(struct pipe_inode_info *ipipe, struct pipe_inode_info *opipe, size_t len, unsigned int flags)
Type:int
Parameter:
Type | Parameter | Name |
---|---|---|
struct pipe_inode_info * | ipipe | |
struct pipe_inode_info * | opipe | |
size_t | len | |
unsigned int | flags |
1544 | ret = 0 |
1545 | bool input_wakeup = false |
1548 | retry : |
1549 | ret = Make sure there's data to read. Wait for input if we can, otherwise* return an appropriate error. |
1553 | ret = Make sure there's writeable room. Wait for room if we can, otherwise* return an appropriate error. |
1562 | pipe_double_lock(ipipe, opipe) |
1569 | Do |
1572 | If Not readers Then |
1582 | If pipe_empty - Return true if the pipe is empty*@head: The pipe ring head pointer*@tail: The pipe ring tail pointer && Not writers Then Break |
1592 | If ret Then Break |
1595 | If flags & don't block on the pipe splicing (but Then |
1605 | pipe_unlock(ipipe) |
1606 | pipe_unlock(opipe) |
1607 | Go to retry |
1625 | Else |
1641 | flags &= ~page is a gift |
1649 | o_head++ |
1656 | pipe_unlock(ipipe) |
1657 | pipe_unlock(opipe) |
1662 | If ret > 0 Then wakeup_pipe_readers(opipe) |
1665 | If input_wakeup Then wakeup_pipe_writers(ipipe) |
1668 | Return ret |
Name | Describe |
---|---|
do_splice | Determine where to splice to/from. |
Source code conversion tool public plug-in interface | X |
---|---|
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