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Subject[PATCH 03/13] 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 | 1 -
fs/namei.c | 1 +
include/linux/fs.h | 1 +
3 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/internal.h b/fs/internal.h
index 873cdf544d54..dd41b12c13f1 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -42,7 +42,6 @@ extern void __init chrdev_init(void);
/*
* namei.c
*/
-extern int __inode_permission(struct inode *, int);
extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
const char *, unsigned int, struct path *);
diff --git a/fs/namei.c b/fs/namei.c
index a7cf0fb1f638..fe615561c90e 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -414,6 +414,7 @@ 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 90463dfd77d1..0ca904f5cd1c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2233,6 +2233,7 @@ extern sector_t bmap(struct inode *, sector_t);
#endif
extern int notify_change(struct dentry *, struct iattr *, struct inode **);
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)
--
1.8.1.4


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