Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\iomap\direct-io.c Create Date:2022-07-28 20:32:08
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:iomap_dio_inline_actor

Proto:static loff_t iomap_dio_inline_actor(struct inode *inode, loff_t pos, loff_t length, struct iomap_dio *dio, struct iomap *iomap)

Type:loff_t

Parameter:

TypeParameterName
struct inode *inode
loff_tpos
loff_tlength
struct iomap_dio *dio
struct iomap *iomap
343  iter = iter
346  BUG_ON(pos + length > PAGE_SIZE - offset_in_page(inline_data))
348  If flags & IOMAP_DIO_WRITE Then
349  size = i_size
351  If pos > size Then memset(inline_data + size, 0, pos - size)
353  copied = copy_from_iter(inline_data + pos, length, iter)
354  If copied Then
355  If pos + copied > size Then NOTE: unlike i_size_read(), i_size_write() does need locking around it* (normally i_mutex), otherwise on 32bit/SMP an update of i_size_seqcount* can be lost, resulting in subsequent i_size_read() calls spinning forever.
357  mark_inode_dirty(inode)
359  Else
360  copied = copy_to_iter(inline_data + pos, length, iter)
362  size += copied
363  Return copied
Caller
NameDescribe
iomap_dio_actor