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    Subject[PATCH 11/13] vfs: export __inode_permission() to modules
    Date
    From: Miklos Szeredi <mszeredi@suse.cz>

    We need to be able to check inode permissions (but not filesystem implied
    permissions) for stackable filesystems. Expose this interface for overlayfs.

    Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
    ---
    fs/internal.h | 5 -----
    fs/namei.c | 1 +
    include/linux/fs.h | 1 +
    3 files changed, 2 insertions(+), 5 deletions(-)

    diff --git a/fs/internal.h b/fs/internal.h
    index 371bcc4..8578209 100644
    --- a/fs/internal.h
    +++ b/fs/internal.h
    @@ -42,11 +42,6 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait)
    extern void __init chrdev_init(void);

    /*
    - * namei.c
    - */
    -extern int __inode_permission(struct inode *, int);
    -
    -/*
    * namespace.c
    */
    extern int copy_mount_options(const void __user *, unsigned long *);
    diff --git a/fs/namei.c b/fs/namei.c
    index ac2526d..9be439a 100644
    --- a/fs/namei.c
    +++ b/fs/namei.c
    @@ -348,6 +348,7 @@ int __inode_permission(struct inode *inode, int mask)

    return security_inode_permission(inode, mask);
    }
    +EXPORT_SYMBOL(__inode_permission);

    /**
    * sb_permission - Check superblock-level permissions
    diff --git a/include/linux/fs.h b/include/linux/fs.h
    index 1265e24..d573703 100644
    --- a/include/linux/fs.h
    +++ b/include/linux/fs.h
    @@ -2418,6 +2418,7 @@ extern sector_t bmap(struct inode *, sector_t);
    #endif
    extern int notify_change(struct dentry *, struct iattr *);
    extern int inode_permission(struct inode *, int);
    +extern int __inode_permission(struct inode *, int);
    extern int generic_permission(struct inode *, int);

    static inline bool execute_ok(struct inode *inode)
    --
    1.7.7


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