Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\libfs.c Create Date:2022-07-28 20:10:24
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:simple_write_end - .write_end helper for non-block-device FSes*@file: See .write_end of address_space_operations*@mapping: "*@pos: "*@len: "*@copied: "*@page: "*@fsdata: "* simple_write_end does the minimum needed for updating a page after writing is

Proto:int simple_write_end(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)

Type:int

Parameter:

TypeParameterName
struct file *file
struct address_space *mapping
loff_tpos
unsignedlen
unsignedcopied
struct page *page
void *fsdata
500  inode = host
501  last_pos = pos + copied
504  If Not PageUptodate(page) Then
505  If copied < len Then
506  from = pos & PAGE_SIZE - 1
510  SetPageUptodate(page)
516  If last_pos > i_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.
519  Dirty a page
520  lock_page - unlock a locked page*@page: the page* Unlocks the page and wakes up sleepers in ___wait_on_page_locked().* Also wakes sleepers in wait_on_page_writeback() because the wakeup* mechanism between PageLocked pages and PageWriteback pages is shared.
521  Perform a free_page(), also freeing any swap cache associated with* this page if it is the last user of the page.
523  Return copied