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fs: Provide __inode_get_bytes()

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Provide helper __inode_get_bytes() which assumes i_lock is already
acquired. Quota code will need this to be able to use i_lock to protect
consistency of quota accounting information and inode usage.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2017-08-08 09:54:36 +02:00
parent 3ab167d2ba
commit f4a8116a4c
2 changed files with 5 additions and 1 deletions
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2
fs/stat.c
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@ -710,7 +710,7 @@ loff_t inode_get_bytes(struct inode *inode)
loff_t ret;
spin_lock(&inode->i_lock);
ret = (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;
ret = __inode_get_bytes(inode);
spin_unlock(&inode->i_lock);
return ret;
}

4
include/linux/fs.h
View file

@ -2998,6 +2998,10 @@ void __inode_add_bytes(struct inode *inode, loff_t bytes);
void inode_add_bytes(struct inode *inode, loff_t bytes);
void __inode_sub_bytes(struct inode *inode, loff_t bytes);
void inode_sub_bytes(struct inode *inode, loff_t bytes);
static inline loff_t __inode_get_bytes(struct inode *inode)
{
return (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;
}
loff_t inode_get_bytes(struct inode *inode);
void inode_set_bytes(struct inode *inode, loff_t bytes);
const char *simple_get_link(struct dentry *, struct inode *,