From a5c96ebf1d71df0c5fb77ab58c9aeb307cf02372 Mon Sep 17 00:00:00 2001 From: Mimi Zohar Date: Tue, 2 Nov 2010 10:11:37 -0400 Subject: [PATCH] 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 Acked-by: Eric Paris --- include/linux/fs.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index ef85322..a3e8f02 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -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); -- 2.7.4