Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / kernfs / kernfs-internal.h

diff --git a/kernel/fs/kernfs/kernfs-internal.h b/kernel/fs/kernfs/kernfs-internal.h
new file mode 100644 (file)
index 0000000..af9fa74
--- /dev/null
+++ b/kernel/fs/kernfs/kernfs-internal.h
@@ -0,0 +1,119 @@
+/*
+ * fs/kernfs/kernfs-internal.h - kernfs internal header file
+ *
+ * Copyright (c) 2001-3 Patrick Mochel
+ * Copyright (c) 2007 SUSE Linux Products GmbH
+ * Copyright (c) 2007, 2013 Tejun Heo <teheo@suse.de>
+ *
+ * This file is released under the GPLv2.
+ */
+
+#ifndef __KERNFS_INTERNAL_H
+#define __KERNFS_INTERNAL_H
+
+#include <linux/lockdep.h>
+#include <linux/fs.h>
+#include <linux/mutex.h>
+#include <linux/xattr.h>
+
+#include <linux/kernfs.h>
+
+struct kernfs_iattrs {
+       struct iattr            ia_iattr;
+       void                    *ia_secdata;
+       u32                     ia_secdata_len;
+
+       struct simple_xattrs    xattrs;
+};
+
+/* +1 to avoid triggering overflow warning when negating it */
+#define KN_DEACTIVATED_BIAS            (INT_MIN + 1)
+
+/* KERNFS_TYPE_MASK and types are defined in include/linux/kernfs.h */
+
+/**
+ * kernfs_root - find out the kernfs_root a kernfs_node belongs to
+ * @kn: kernfs_node of interest
+ *
+ * Return the kernfs_root @kn belongs to.
+ */
+static inline struct kernfs_root *kernfs_root(struct kernfs_node *kn)
+{
+       /* if parent exists, it's always a dir; otherwise, @sd is a dir */
+       if (kn->parent)
+               kn = kn->parent;
+       return kn->dir.root;
+}
+
+/*
+ * mount.c
+ */
+struct kernfs_super_info {
+       struct super_block      *sb;
+
+       /*
+        * The root associated with this super_block.  Each super_block is
+        * identified by the root and ns it's associated with.
+        */
+       struct kernfs_root      *root;
+
+       /*
+        * Each sb is associated with one namespace tag, currently the
+        * network namespace of the task which mounted this kernfs
+        * instance.  If multiple tags become necessary, make the following
+        * an array and compare kernfs_node tag against every entry.
+        */
+       const void              *ns;
+
+       /* anchored at kernfs_root->supers, protected by kernfs_mutex */
+       struct list_head        node;
+};
+#define kernfs_info(SB) ((struct kernfs_super_info *)(SB->s_fs_info))
+
+extern const struct super_operations kernfs_sops;
+extern struct kmem_cache *kernfs_node_cache;
+
+/*
+ * inode.c
+ */
+struct inode *kernfs_get_inode(struct super_block *sb, struct kernfs_node *kn);
+void kernfs_evict_inode(struct inode *inode);
+int kernfs_iop_permission(struct inode *inode, int mask);
+int kernfs_iop_setattr(struct dentry *dentry, struct iattr *iattr);
+int kernfs_iop_getattr(struct vfsmount *mnt, struct dentry *dentry,
+                      struct kstat *stat);
+int kernfs_iop_setxattr(struct dentry *dentry, const char *name, const void *value,
+                       size_t size, int flags);
+int kernfs_iop_removexattr(struct dentry *dentry, const char *name);
+ssize_t kernfs_iop_getxattr(struct dentry *dentry, const char *name, void *buf,
+                           size_t size);
+ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size);
+
+/*
+ * dir.c
+ */
+extern struct mutex kernfs_mutex;
+extern const struct dentry_operations kernfs_dops;
+extern const struct file_operations kernfs_dir_fops;
+extern const struct inode_operations kernfs_dir_iops;
+
+struct kernfs_node *kernfs_get_active(struct kernfs_node *kn);
+void kernfs_put_active(struct kernfs_node *kn);
+int kernfs_add_one(struct kernfs_node *kn);
+struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
+                                   const char *name, umode_t mode,
+                                   unsigned flags);
+
+/*
+ * file.c
+ */
+extern const struct file_operations kernfs_file_fops;
+
+void kernfs_unmap_bin_file(struct kernfs_node *kn);
+
+/*
+ * symlink.c
+ */
+extern const struct inode_operations kernfs_symlink_iops;
+
+#endif /* __KERNFS_INTERNAL_H */