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 11:08:50
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Convert allocated space back to in-memory reserved quotas

函数原型：void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number)

返回类型：void

参数：

类型参数名称
struct inode *inode
qsize_tnumber
1811  如果非dquot_active(inode)则
1812  加自旋锁
1813  de_reserved_space is managed internally by quota, and protected by* i_lock similar to i_blocks+i_bytes.加等于number
1814  __inode_sub_bytes(inode, number)
1815  自旋锁解锁
1816  返回
1819  dquots等于i_dquot(inode)
1820  index等于srcu_read_lock - register a new reader for an SRCU-protected structure
1821  加自旋锁
1823  以cnt小于MAXQUOTAS循环
1824  如果dquots[cnt]则
1825  dquot等于dquots[cnt]
1827  加自旋锁
1828  如果WARN_ON_ONCE(current used space < number)则number等于current used space
1830  current reserved space for delalloc加等于number
1831  current used space 减等于number
1832  自旋锁解锁
1836  de_reserved_space is managed internally by quota, and protected by* i_lock similar to i_blocks+i_bytes.加等于number
1837  __inode_sub_bytes(inode, number)
1838  自旋锁解锁
1839  Dirtify all the dquots - this can block when journalling
1840  注销过期读锁
1841  返回
调用者
名称描述
dquot_reclaim_block