Messages in this thread Patch in this message | | | From | Mimi Zohar <> | Subject | [PATCH 2/4] IMA: define readcount functions | Date | Mon, 14 Feb 2011 15:29:55 -0500 |
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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> --- include/linux/fs.h | 20 ++++++++++++++++++++ 1 files changed, 20 insertions(+), 0 deletions(-)
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); -- 1.7.3.4
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