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Diffstat (limited to 'fs/configfs/configfs_internal.h')
-rw-r--r--fs/configfs/configfs_internal.h89
1 files changed, 44 insertions, 45 deletions
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index b5f0a3b91f18..0b969d0eb8ff 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -1,39 +1,38 @@
-/* -*- mode: c; c-basic-offset:8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
* configfs_internal.h - Internal stuff for configfs
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
* Based on sysfs:
* sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
*
* configfs Copyright (C) 2005 Oracle. All rights reserved.
*/
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/spinlock.h>
+struct configfs_fragment {
+ atomic_t frag_count;
+ struct rw_semaphore frag_sem;
+ bool frag_dead;
+};
+
+void put_fragment(struct configfs_fragment *);
+struct configfs_fragment *get_fragment(struct configfs_fragment *);
+
struct configfs_dirent {
atomic_t s_count;
int s_dependent_count;
struct list_head s_sibling;
struct list_head s_children;
- struct list_head s_links;
+ int s_links;
void * s_element;
int s_type;
umode_t s_mode;
@@ -42,18 +41,22 @@ struct configfs_dirent {
#ifdef CONFIG_LOCKDEP
int s_depth;
#endif
+ struct configfs_fragment *s_frag;
};
#define CONFIGFS_ROOT 0x0001
#define CONFIGFS_DIR 0x0002
#define CONFIGFS_ITEM_ATTR 0x0004
+#define CONFIGFS_ITEM_BIN_ATTR 0x0008
#define CONFIGFS_ITEM_LINK 0x0020
#define CONFIGFS_USET_DIR 0x0040
#define CONFIGFS_USET_DEFAULT 0x0080
#define CONFIGFS_USET_DROPPING 0x0100
#define CONFIGFS_USET_IN_MKDIR 0x0200
#define CONFIGFS_USET_CREATING 0x0400
-#define CONFIGFS_NOT_PINNED (CONFIGFS_ITEM_ATTR)
+#define CONFIGFS_NOT_PINNED (CONFIGFS_ITEM_ATTR | CONFIGFS_ITEM_BIN_ATTR)
+#define CONFIGFS_PINNED \
+ (CONFIGFS_ROOT | CONFIGFS_DIR | CONFIGFS_ITEM_LINK)
extern struct mutex configfs_symlink_mutex;
extern spinlock_t configfs_dirent_lock;
@@ -63,46 +66,38 @@ extern struct kmem_cache *configfs_dir_cachep;
extern int configfs_is_root(struct config_item *item);
extern struct inode * configfs_new_inode(umode_t mode, struct configfs_dirent *, struct super_block *);
-extern int configfs_create(struct dentry *, umode_t mode, int (*init)(struct inode *));
-extern int configfs_inode_init(void);
-extern void configfs_inode_exit(void);
+extern struct inode *configfs_create(struct dentry *, umode_t mode);
extern int configfs_create_file(struct config_item *, const struct configfs_attribute *);
-extern int configfs_make_dirent(struct configfs_dirent *,
- struct dentry *, void *, umode_t, int);
+extern int configfs_create_bin_file(struct config_item *,
+ const struct configfs_bin_attribute *);
+extern int configfs_make_dirent(struct configfs_dirent *, struct dentry *,
+ void *, umode_t, int, struct configfs_fragment *);
extern int configfs_dirent_is_ready(struct configfs_dirent *);
-extern int configfs_add_file(struct dentry *, const struct configfs_attribute *, int);
-extern void configfs_hash_and_remove(struct dentry * dir, const char * name);
-
extern const unsigned char * configfs_get_name(struct configfs_dirent *sd);
extern void configfs_drop_dentry(struct configfs_dirent *sd, struct dentry *parent);
-extern int configfs_setattr(struct dentry *dentry, struct iattr *iattr);
+extern int configfs_setattr(struct mnt_idmap *idmap,
+ struct dentry *dentry, struct iattr *iattr);
extern struct dentry *configfs_pin_fs(void);
extern void configfs_release_fs(void);
-extern struct rw_semaphore configfs_rename_sem;
extern const struct file_operations configfs_dir_operations;
extern const struct file_operations configfs_file_operations;
-extern const struct file_operations bin_fops;
+extern const struct file_operations configfs_bin_file_operations;
extern const struct inode_operations configfs_dir_inode_operations;
extern const struct inode_operations configfs_root_inode_operations;
extern const struct inode_operations configfs_symlink_inode_operations;
extern const struct dentry_operations configfs_dentry_ops;
-extern int configfs_symlink(struct inode *dir, struct dentry *dentry,
+extern int configfs_symlink(struct mnt_idmap *idmap,
+ struct inode *dir, struct dentry *dentry,
const char *symname);
extern int configfs_unlink(struct inode *dir, struct dentry *dentry);
-struct configfs_symlink {
- struct list_head sl_list;
- struct config_item *sl_target;
-};
-
-extern int configfs_create_link(struct configfs_symlink *sl,
- struct dentry *parent,
- struct dentry *dentry);
+int configfs_create_link(struct configfs_dirent *target, struct dentry *parent,
+ struct dentry *dentry, char *body);
static inline struct config_item * to_item(struct dentry * dentry)
{
@@ -116,6 +111,13 @@ static inline struct configfs_attribute * to_attr(struct dentry * dentry)
return ((struct configfs_attribute *) sd->s_element);
}
+static inline struct configfs_bin_attribute *to_bin_attr(struct dentry *dentry)
+{
+ struct configfs_attribute *attr = to_attr(dentry);
+
+ return container_of(attr, struct configfs_bin_attribute, cb_attr);
+}
+
static inline struct config_item *configfs_get_config_item(struct dentry *dentry)
{
struct config_item * item = NULL;
@@ -123,11 +125,7 @@ static inline struct config_item *configfs_get_config_item(struct dentry *dentry
spin_lock(&dentry->d_lock);
if (!d_unhashed(dentry)) {
struct configfs_dirent * sd = dentry->d_fsdata;
- if (sd->s_type & CONFIGFS_ITEM_LINK) {
- struct configfs_symlink * sl = sd->s_element;
- item = config_item_get(sl->sl_target);
- } else
- item = config_item_get(sd->s_element);
+ item = config_item_get(sd->s_element);
}
spin_unlock(&dentry->d_lock);
@@ -138,6 +136,7 @@ static inline void release_configfs_dirent(struct configfs_dirent * sd)
{
if (!(sd->s_type & CONFIGFS_ROOT)) {
kfree(sd->s_iattr);
+ put_fragment(sd->s_frag);
kmem_cache_free(configfs_dir_cachep, sd);
}
}
generated by cgit (git 2.34.1) at 2025-12-25 04:41:56 +0000