函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\quota\dquot.c Create Date:2022-07-29 11:08:38
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Write all dquot structures to quota files

函数原型：int dquot_writeback_dquots(struct super_block *sb, int type)

返回类型：int

参数：

类型参数名称
struct super_block *sb
inttype
627  dqopt等于sb_dqopt(sb)
629  ret等于0
631  WARN_ON_ONCE(!In all implementations count != 0 means locked )
633  以cnt小于MAXQUOTAS循环
634  如果type不等于负1且cnt不等于type则继续下一循环
636  如果非sb_has_quota_active(sb, cnt)则继续下一循环
638  加自旋锁
640  list_replace_init( & List of dirty dquots [dq_list_lock] , & dirty)
641  当非链表为空循环
642  dquot等于list_first_entry - get the first element from a list*@ptr: the list head to take the element from.*@type: the type of the struct this is embedded in.*@member: the name of the list_head within the struct.* Note, that list is expected to be not empty.( & dirty, structdquot, dq_dirty)
645  WARN_ON(!st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from)
650  dqgrab(dquot)
651  自旋锁解锁
652  err等于write_dquot(dquot)
653  如果err则
658  clear_dquot_dirty(dquot)
659  如果非ret则ret等于err
662  Put reference to dquot
663  加自旋锁
665  自旋锁解锁
668  以cnt小于MAXQUOTAS循环如果cnt恒等于type或type恒等于负1的值且sb_has_quota_active(sb, cnt)且info_dirty( & Information for each quota type [cnt])则
671  write_info(sb, cnt)
672  dqstats_inc(DQST_SYNCS)
674  返回:ret
调用者
名称描述
dquot_quota_syncWrite all dquot structures to disk and make them visible from userspace