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 in-memory reserved quotas to real consumed quotas

函数原型：int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)

返回类型：int

参数：

类型参数名称
struct inode *inode
qsize_tnumber
1769  如果非dquot_active(inode)则
1770  加自旋锁
1771  de_reserved_space is managed internally by quota, and protected by* i_lock similar to i_blocks+i_bytes.减等于number
1772  Caller is here responsible for sufficient locking (ie. inode->i_lock)
1773  自旋锁解锁
1774  返回:0
1777  dquots等于i_dquot(inode)
1778  index等于srcu_read_lock - register a new reader for an SRCU-protected structure
1779  加自旋锁
1781  以cnt小于MAXQUOTAS循环
1782  如果dquots[cnt]则
1783  dquot等于dquots[cnt]
1785  加自旋锁
1786  如果WARN_ON_ONCE(current reserved space for delalloc < number)则number等于current reserved space for delalloc
1788  current used space 加等于number
1789  current reserved space for delalloc减等于number
1790  自旋锁解锁
1794  de_reserved_space is managed internally by quota, and protected by* i_lock similar to i_blocks+i_bytes.减等于number
1795  Caller is here responsible for sufficient locking (ie. inode->i_lock)
1796  自旋锁解锁
1797  Dirtify all the dquots - this can block when journalling
1798  注销过期读锁
1799  返回:0
调用者
名称描述
dquot_claim_block