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IMA: define readcount functions 

Define i_readcount_inc/dec() functions to be called from the VFS layer.

Changelog:
- renamed iget/iput_readcount to i_readcount_inc/dec (Dave Chinner's suggestion)
- removed i_lock in iput_readcount() (based on comments:Dave Chinner,Eric Paris)

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Mimi Zohar 2010-11-02 10:11:37 -04:00
parent a68a27b6f2
commit a5c96ebf1d
1 changed files with 20 additions and 0 deletions
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20
include/linux/fs.h
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@ -2186,6 +2186,26 @@ static inline void allow_write_access(struct file *file)
if (file)
atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
}
#ifdef CONFIG_IMA
static inline void i_readcount_dec(struct inode *inode)
{
BUG_ON(!atomic_read(&inode->i_readcount));
atomic_dec(&inode->i_readcount);
}
static inline void i_readcount_inc(struct inode *inode)
{
atomic_inc(&inode->i_readcount);
}
#else
static inline void i_readcount_dec(struct inode *inode)
{
return;
}
static inline void i_readcount_inc(struct inode *inode)
{
return;
}
#endif
extern int do_pipe_flags(int *, int);
extern struct file *create_read_pipe(struct file *f, int flags);
extern struct file *create_write_pipe(int flags);