Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\quota\dquot.c Create Date:2022-07-28 20:32:51
Last Modify:2020-03-12 14:18:49 Copyright©Brick
home page Tree
Annotation kernel can get tool activityDownload SCCTChinese

Name:Write all dquot structures to quota files

Proto:int dquot_writeback_dquots(struct super_block *sb, int type)

Type:int

Parameter:

TypeParameterName
struct super_block *sb
inttype
627  dqopt = sb_dqopt(sb)
629  ret = 0
631  WARN_ON_ONCE(!In all implementations count != 0 means locked )
633  When cnt < MAXQUOTAS cycle
634  If type != -1 && cnt != type Then Continue
636  If Not sb_has_quota_active(sb, cnt) Then Continue
638  spin_lock( & There are five quota SMP locks:* * dq_list_lock protects all lists with quotas and quota formats)
640  list_replace_init( & List of dirty dquots [dq_list_lock] , & dirty)
641  When Not list_empty - tests whether a list is empty*@head: the list to test. cycle
642  dquot = 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  spin_unlock( & There are five quota SMP locks:* * dq_list_lock protects all lists with quotas and quota formats)
652  err = write_dquot(dquot)
653  If err Then
658  clear_dquot_dirty(dquot)
659  If Not ret Then ret = err
662  Put reference to dquot
663  spin_lock( & There are five quota SMP locks:* * dq_list_lock protects all lists with quotas and quota formats)
665  spin_unlock( & There are five quota SMP locks:* * dq_list_lock protects all lists with quotas and quota formats)
668  When cnt < MAXQUOTAS cycle If ( cnt == type || type == -1 ) && sb_has_quota_active(sb, cnt) && info_dirty( & Information for each quota type [cnt]) Then
671  write_info(sb, cnt)
672  dqstats_inc(DQST_SYNCS)
674  Return ret
Caller
NameDescribe
dquot_quota_syncWrite all dquot structures to disk and make them visible from userspace