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-rw-r--r--fs/configfs/configfs_internal.h6
-rw-r--r--fs/configfs/dir.c36
-rw-r--r--fs/configfs/inode.c5
-rw-r--r--fs/configfs/item.c58
-rw-r--r--fs/configfs/mount.c4
5 files changed, 57 insertions, 52 deletions
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index b5f0a3b91f1..bd4a3c16709 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -24,6 +24,12 @@
* 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>
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 277bd1be21f..668dcabc569 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -56,29 +56,28 @@ static void configfs_d_iput(struct dentry * dentry,
struct configfs_dirent *sd = dentry->d_fsdata;
if (sd) {
- BUG_ON(sd->s_dentry != dentry);
/* Coordinate with configfs_readdir */
spin_lock(&configfs_dirent_lock);
- sd->s_dentry = NULL;
+ /* Coordinate with configfs_attach_attr where will increase
+ * sd->s_count and update sd->s_dentry to new allocated one.
+ * Only set sd->dentry to null when this dentry is the only
+ * sd owner.
+ * If not do so, configfs_d_iput may run just after
+ * configfs_attach_attr and set sd->s_dentry to null
+ * even it's still in use.
+ */
+ if (atomic_read(&sd->s_count) <= 2)
+ sd->s_dentry = NULL;
+
spin_unlock(&configfs_dirent_lock);
configfs_put(sd);
}
iput(inode);
}
-/*
- * We _must_ delete our dentries on last dput, as the chain-to-parent
- * behavior is required to clear the parents of default_groups.
- */
-static int configfs_d_delete(const struct dentry *dentry)
-{
- return 1;
-}
-
const struct dentry_operations configfs_dentry_ops = {
.d_iput = configfs_d_iput,
- /* simple_delete_dentry() isn't exported */
- .d_delete = configfs_d_delete,
+ .d_delete = always_delete_dentry,
};
#ifdef CONFIG_LOCKDEP
@@ -426,8 +425,11 @@ static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * den
struct configfs_attribute * attr = sd->s_element;
int error;
+ spin_lock(&configfs_dirent_lock);
dentry->d_fsdata = configfs_get(sd);
sd->s_dentry = dentry;
+ spin_unlock(&configfs_dirent_lock);
+
error = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG,
configfs_init_file);
if (error) {
@@ -938,9 +940,9 @@ static void client_drop_item(struct config_item *parent_item,
#ifdef DEBUG
static void configfs_dump_one(struct configfs_dirent *sd, int level)
{
- printk(KERN_INFO "%*s\"%s\":\n", level, " ", configfs_get_name(sd));
+ pr_info("%*s\"%s\":\n", level, " ", configfs_get_name(sd));
-#define type_print(_type) if (sd->s_type & _type) printk(KERN_INFO "%*s %s\n", level, " ", #_type);
+#define type_print(_type) if (sd->s_type & _type) pr_info("%*s %s\n", level, " ", #_type);
type_print(CONFIGFS_ROOT);
type_print(CONFIGFS_DIR);
type_print(CONFIGFS_ITEM_ATTR);
@@ -1697,7 +1699,7 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
struct dentry *root = dentry->d_sb->s_root;
if (dentry->d_parent != root) {
- printk(KERN_ERR "configfs: Tried to unregister non-subsystem!\n");
+ pr_err("Tried to unregister non-subsystem!\n");
return;
}
@@ -1707,7 +1709,7 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
mutex_lock(&configfs_symlink_mutex);
spin_lock(&configfs_dirent_lock);
if (configfs_detach_prep(dentry, NULL)) {
- printk(KERN_ERR "configfs: Tried to unregister non-empty subsystem!\n");
+ pr_err("Tried to unregister non-empty subsystem!\n");
}
spin_unlock(&configfs_dirent_lock);
mutex_unlock(&configfs_symlink_mutex);
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index a9d35b0e06c..5946ad98053 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -168,9 +168,8 @@ static void configfs_set_inode_lock_class(struct configfs_dirent *sd,
* In practice the maximum level of locking depth is
* already reached. Just inform about possible reasons.
*/
- printk(KERN_INFO "configfs: Too many levels of inodes"
- " for the locking correctness validator.\n");
- printk(KERN_INFO "Spurious warnings may appear.\n");
+ pr_info("Too many levels of inodes for the locking correctness validator.\n");
+ pr_info("Spurious warnings may appear.\n");
}
}
}
diff --git a/fs/configfs/item.c b/fs/configfs/item.c
index 50cee7f9110..e65f9ffbb99 100644
--- a/fs/configfs/item.c
+++ b/fs/configfs/item.c
@@ -19,7 +19,7 @@
* Boston, MA 021110-1307, USA.
*
* Based on kobject:
- * kobject is Copyright (c) 2002-2003 Patrick Mochel
+ * kobject is Copyright (c) 2002-2003 Patrick Mochel
*
* configfs Copyright (C) 2005 Oracle. All rights reserved.
*
@@ -35,9 +35,9 @@
#include <linux/configfs.h>
-static inline struct config_item * to_item(struct list_head * entry)
+static inline struct config_item *to_item(struct list_head *entry)
{
- return container_of(entry,struct config_item,ci_entry);
+ return container_of(entry, struct config_item, ci_entry);
}
/* Evil kernel */
@@ -47,34 +47,35 @@ static void config_item_release(struct kref *kref);
* config_item_init - initialize item.
* @item: item in question.
*/
-void config_item_init(struct config_item * item)
+void config_item_init(struct config_item *item)
{
kref_init(&item->ci_kref);
INIT_LIST_HEAD(&item->ci_entry);
}
+EXPORT_SYMBOL(config_item_init);
/**
* config_item_set_name - Set the name of an item
* @item: item.
- * @name: name.
+ * @fmt: The vsnprintf()'s format string.
*
* If strlen(name) >= CONFIGFS_ITEM_NAME_LEN, then use a
* dynamically allocated string that @item->ci_name points to.
* Otherwise, use the static @item->ci_namebuf array.
*/
-int config_item_set_name(struct config_item * item, const char * fmt, ...)
+int config_item_set_name(struct config_item *item, const char *fmt, ...)
{
int error = 0;
int limit = CONFIGFS_ITEM_NAME_LEN;
int need;
va_list args;
- char * name;
+ char *name;
/*
* First, try the static array
*/
- va_start(args,fmt);
- need = vsnprintf(item->ci_namebuf,limit,fmt,args);
+ va_start(args, fmt);
+ need = vsnprintf(item->ci_namebuf, limit, fmt, args);
va_end(args);
if (need < limit)
name = item->ci_namebuf;
@@ -83,13 +84,13 @@ int config_item_set_name(struct config_item * item, const char * fmt, ...)
* Need more space? Allocate it and try again
*/
limit = need + 1;
- name = kmalloc(limit,GFP_KERNEL);
+ name = kmalloc(limit, GFP_KERNEL);
if (!name) {
error = -ENOMEM;
goto Done;
}
- va_start(args,fmt);
- need = vsnprintf(name,limit,fmt,args);
+ va_start(args, fmt);
+ need = vsnprintf(name, limit, fmt, args);
va_end(args);
/* Still? Give up. */
@@ -109,7 +110,6 @@ int config_item_set_name(struct config_item * item, const char * fmt, ...)
Done:
return error;
}
-
EXPORT_SYMBOL(config_item_set_name);
void config_item_init_type_name(struct config_item *item,
@@ -131,20 +131,21 @@ void config_group_init_type_name(struct config_group *group, const char *name,
}
EXPORT_SYMBOL(config_group_init_type_name);
-struct config_item * config_item_get(struct config_item * item)
+struct config_item *config_item_get(struct config_item *item)
{
if (item)
kref_get(&item->ci_kref);
return item;
}
+EXPORT_SYMBOL(config_item_get);
-static void config_item_cleanup(struct config_item * item)
+static void config_item_cleanup(struct config_item *item)
{
- struct config_item_type * t = item->ci_type;
- struct config_group * s = item->ci_group;
- struct config_item * parent = item->ci_parent;
+ struct config_item_type *t = item->ci_type;
+ struct config_group *s = item->ci_group;
+ struct config_item *parent = item->ci_parent;
- pr_debug("config_item %s: cleaning up\n",config_item_name(item));
+ pr_debug("config_item %s: cleaning up\n", config_item_name(item));
if (item->ci_name != item->ci_namebuf)
kfree(item->ci_name);
item->ci_name = NULL;
@@ -167,21 +168,23 @@ static void config_item_release(struct kref *kref)
*
* Decrement the refcount, and if 0, call config_item_cleanup().
*/
-void config_item_put(struct config_item * item)
+void config_item_put(struct config_item *item)
{
if (item)
kref_put(&item->ci_kref, config_item_release);
}
+EXPORT_SYMBOL(config_item_put);
/**
* config_group_init - initialize a group for use
- * @k: group
+ * @group: config_group
*/
void config_group_init(struct config_group *group)
{
config_item_init(&group->cg_item);
INIT_LIST_HEAD(&group->cg_children);
}
+EXPORT_SYMBOL(config_group_init);
/**
* config_group_find_item - search for item in group.
@@ -195,11 +198,11 @@ void config_group_init(struct config_group *group)
struct config_item *config_group_find_item(struct config_group *group,
const char *name)
{
- struct list_head * entry;
- struct config_item * ret = NULL;
+ struct list_head *entry;
+ struct config_item *ret = NULL;
- list_for_each(entry,&group->cg_children) {
- struct config_item * item = to_item(entry);
+ list_for_each(entry, &group->cg_children) {
+ struct config_item *item = to_item(entry);
if (config_item_name(item) &&
!strcmp(config_item_name(item), name)) {
ret = config_item_get(item);
@@ -208,9 +211,4 @@ struct config_item *config_group_find_item(struct config_group *group,
}
return ret;
}
-
-EXPORT_SYMBOL(config_item_init);
-EXPORT_SYMBOL(config_group_init);
-EXPORT_SYMBOL(config_item_get);
-EXPORT_SYMBOL(config_item_put);
EXPORT_SYMBOL(config_group_find_item);
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index 7f26c3cf75a..f6c28583339 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -85,7 +85,7 @@ static int configfs_fill_super(struct super_block *sb, void *data, int silent)
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inc_nlink(inode);
} else {
- pr_debug("configfs: could not get root inode\n");
+ pr_debug("could not get root inode\n");
return -ENOMEM;
}
@@ -155,7 +155,7 @@ static int __init configfs_init(void)
return 0;
out4:
- printk(KERN_ERR "configfs: Unable to register filesystem!\n");
+ pr_err("Unable to register filesystem!\n");
configfs_inode_exit();
out3:
kobject_put(config_kobj);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 07:40:11 +0000