quota: provide interface for readding allocated space into reserved space

ext4 needs to convert allocated (metadata) blocks back into blocks
reserved for delayed allocation. Add functions into quota code for
supporting such operation.

Signed-off-by: Jan Kara <[email protected]>
Signed-off-by: "Theodore Ts'o" <[email protected]>
This commit is contained in:
Jan Kara 2013-08-17 09:32:32 -04:00 • committed by Theodore Ts'o
commit 1c8924eb10
4 changed files with 71 additions and 2 deletions

View file

@ -447,9 +447,8 @@ void inode_add_bytes(struct inode *inode, loff_t bytes)
EXPORT_SYMBOL(inode_add_bytes);
void inode_sub_bytes(struct inode *inode, loff_t bytes)
void __inode_sub_bytes(struct inode *inode, loff_t bytes)
{
spin_lock(&inode->i_lock);
inode->i_blocks -= bytes >> 9;
bytes &= 511;
if (inode->i_bytes < bytes) {
@ -457,6 +456,14 @@ void inode_sub_bytes(struct inode *inode, loff_t bytes)
inode->i_bytes += 512;
}
inode->i_bytes -= bytes;
}
EXPORT_SYMBOL(__inode_sub_bytes);
void inode_sub_bytes(struct inode *inode, loff_t bytes)
{
spin_lock(&inode->i_lock);
__inode_sub_bytes(inode, bytes);
spin_unlock(&inode->i_lock);
}