[SPARC64]: Update defconfig.
[linux-2.6/verdex.git] / fs / configfs / configfs_internal.h
blobf70e46951b3781ec1baa4677e715919ac78724c2
1 /* -*- mode: c; c-basic-offset:8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
4 * configfs_internal.h - Internal stuff for configfs
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public
17 * License along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA.
21 * Based on sysfs:
22 * sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
24 * configfs Copyright (C) 2005 Oracle. All rights reserved.
27 #include <linux/slab.h>
28 #include <linux/list.h>
30 struct configfs_dirent {
31 atomic_t s_count;
32 struct list_head s_sibling;
33 struct list_head s_children;
34 struct list_head s_links;
35 void * s_element;
36 int s_type;
37 umode_t s_mode;
38 struct dentry * s_dentry;
39 struct iattr * s_iattr;
42 #define CONFIGFS_ROOT 0x0001
43 #define CONFIGFS_DIR 0x0002
44 #define CONFIGFS_ITEM_ATTR 0x0004
45 #define CONFIGFS_ITEM_LINK 0x0020
46 #define CONFIGFS_USET_DIR 0x0040
47 #define CONFIGFS_USET_DEFAULT 0x0080
48 #define CONFIGFS_USET_DROPPING 0x0100
49 #define CONFIGFS_NOT_PINNED (CONFIGFS_ITEM_ATTR)
51 extern struct vfsmount * configfs_mount;
52 extern kmem_cache_t *configfs_dir_cachep;
54 extern int configfs_is_root(struct config_item *item);
56 extern struct inode * configfs_new_inode(mode_t mode, struct configfs_dirent *);
57 extern int configfs_create(struct dentry *, int mode, int (*init)(struct inode *));
59 extern int configfs_create_file(struct config_item *, const struct configfs_attribute *);
60 extern int configfs_make_dirent(struct configfs_dirent *,
61 struct dentry *, void *, umode_t, int);
63 extern int configfs_add_file(struct dentry *, const struct configfs_attribute *, int);
64 extern void configfs_hash_and_remove(struct dentry * dir, const char * name);
66 extern const unsigned char * configfs_get_name(struct configfs_dirent *sd);
67 extern void configfs_drop_dentry(struct configfs_dirent *sd, struct dentry *parent);
68 extern int configfs_setattr(struct dentry *dentry, struct iattr *iattr);
70 extern int configfs_pin_fs(void);
71 extern void configfs_release_fs(void);
73 extern struct rw_semaphore configfs_rename_sem;
74 extern struct super_block * configfs_sb;
75 extern struct file_operations configfs_dir_operations;
76 extern struct file_operations configfs_file_operations;
77 extern struct file_operations bin_fops;
78 extern struct inode_operations configfs_dir_inode_operations;
79 extern struct inode_operations configfs_symlink_inode_operations;
81 extern int configfs_symlink(struct inode *dir, struct dentry *dentry,
82 const char *symname);
83 extern int configfs_unlink(struct inode *dir, struct dentry *dentry);
85 struct configfs_symlink {
86 struct list_head sl_list;
87 struct config_item *sl_target;
90 extern int configfs_create_link(struct configfs_symlink *sl,
91 struct dentry *parent,
92 struct dentry *dentry);
94 static inline struct config_item * to_item(struct dentry * dentry)
96 struct configfs_dirent * sd = dentry->d_fsdata;
97 return ((struct config_item *) sd->s_element);
100 static inline struct configfs_attribute * to_attr(struct dentry * dentry)
102 struct configfs_dirent * sd = dentry->d_fsdata;
103 return ((struct configfs_attribute *) sd->s_element);
106 static inline struct config_item *configfs_get_config_item(struct dentry *dentry)
108 struct config_item * item = NULL;
110 spin_lock(&dcache_lock);
111 if (!d_unhashed(dentry)) {
112 struct configfs_dirent * sd = dentry->d_fsdata;
113 if (sd->s_type & CONFIGFS_ITEM_LINK) {
114 struct configfs_symlink * sl = sd->s_element;
115 item = config_item_get(sl->sl_target);
116 } else
117 item = config_item_get(sd->s_element);
119 spin_unlock(&dcache_lock);
121 return item;
124 static inline void release_configfs_dirent(struct configfs_dirent * sd)
126 if (!(sd->s_type & CONFIGFS_ROOT)) {
127 kfree(sd->s_iattr);
128 kmem_cache_free(configfs_dir_cachep, sd);
132 static inline struct configfs_dirent * configfs_get(struct configfs_dirent * sd)
134 if (sd) {
135 WARN_ON(!atomic_read(&sd->s_count));
136 atomic_inc(&sd->s_count);
138 return sd;
141 static inline void configfs_put(struct configfs_dirent * sd)
143 WARN_ON(!atomic_read(&sd->s_count));
144 if (atomic_dec_and_test(&sd->s_count))
145 release_configfs_dirent(sd);