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Diffstat (limited to 'fs/debugfs/inode.c')
-rw-r--r--fs/debugfs/inode.c87
1 files changed, 41 insertions, 46 deletions
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 96400ab42d13..c711be8d6a3c 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -44,11 +44,6 @@ static struct inode *debugfs_get_inode(struct super_block *sb)
return inode;
}
-static inline int debugfs_positive(struct dentry *dentry)
-{
- return dentry->d_inode && !d_unhashed(dentry);
-}
-
struct debugfs_mount_opts {
kuid_t uid;
kgid_t gid;
@@ -124,7 +119,7 @@ static int debugfs_parse_options(char *data, struct debugfs_mount_opts *opts)
static int debugfs_apply_options(struct super_block *sb)
{
struct debugfs_fs_info *fsi = sb->s_fs_info;
- struct inode *inode = sb->s_root->d_inode;
+ struct inode *inode = d_inode(sb->s_root);
struct debugfs_mount_opts *opts = &fsi->mount_opts;
inode->i_mode &= ~S_IALLUGO;
@@ -174,7 +169,7 @@ static void debugfs_evict_inode(struct inode *inode)
truncate_inode_pages_final(&inode->i_data);
clear_inode(inode);
if (S_ISLNK(inode->i_mode))
- kfree(inode->i_private);
+ kfree(inode->i_link);
}
static const struct super_operations debugfs_super_operations = {
@@ -188,7 +183,7 @@ static struct vfsmount *debugfs_automount(struct path *path)
{
struct vfsmount *(*f)(void *);
f = (struct vfsmount *(*)(void *))path->dentry->d_fsdata;
- return f(path->dentry->d_inode->i_private);
+ return f(d_inode(path->dentry)->i_private);
}
static const struct dentry_operations debugfs_dops = {
@@ -254,6 +249,9 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
pr_debug("debugfs: creating file '%s'\n",name);
+ if (IS_ERR(parent))
+ return parent;
+
error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
&debugfs_mount_count);
if (error)
@@ -267,20 +265,20 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
if (!parent)
parent = debugfs_mount->mnt_root;
- mutex_lock(&parent->d_inode->i_mutex);
+ mutex_lock(&d_inode(parent)->i_mutex);
dentry = lookup_one_len(name, parent, strlen(name));
- if (!IS_ERR(dentry) && dentry->d_inode) {
+ if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {
dput(dentry);
dentry = ERR_PTR(-EEXIST);
}
if (IS_ERR(dentry))
- mutex_unlock(&parent->d_inode->i_mutex);
+ mutex_unlock(&d_inode(parent)->i_mutex);
return dentry;
}
static struct dentry *failed_creating(struct dentry *dentry)
{
- mutex_unlock(&dentry->d_parent->d_inode->i_mutex);
+ mutex_unlock(&d_inode(dentry->d_parent)->i_mutex);
dput(dentry);
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
return NULL;
@@ -288,7 +286,7 @@ static struct dentry *failed_creating(struct dentry *dentry)
static struct dentry *end_creating(struct dentry *dentry)
{
- mutex_unlock(&dentry->d_parent->d_inode->i_mutex);
+ mutex_unlock(&d_inode(dentry->d_parent)->i_mutex);
return dentry;
}
@@ -341,7 +339,7 @@ struct dentry *debugfs_create_file(const char *name, umode_t mode,
inode->i_fop = fops ? fops : &debugfs_file_operations;
inode->i_private = data;
d_instantiate(dentry, inode);
- fsnotify_create(dentry->d_parent->d_inode, dentry);
+ fsnotify_create(d_inode(dentry->d_parent), dentry);
return end_creating(dentry);
}
EXPORT_SYMBOL_GPL(debugfs_create_file);
@@ -381,7 +379,7 @@ struct dentry *debugfs_create_file_size(const char *name, umode_t mode,
struct dentry *de = debugfs_create_file(name, mode, parent, data, fops);
if (de)
- de->d_inode->i_size = file_size;
+ d_inode(de)->i_size = file_size;
return de;
}
EXPORT_SYMBOL_GPL(debugfs_create_file_size);
@@ -423,8 +421,8 @@ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inc_nlink(inode);
d_instantiate(dentry, inode);
- inc_nlink(dentry->d_parent->d_inode);
- fsnotify_mkdir(dentry->d_parent->d_inode, dentry);
+ inc_nlink(d_inode(dentry->d_parent));
+ fsnotify_mkdir(d_inode(dentry->d_parent), dentry);
return end_creating(dentry);
}
EXPORT_SYMBOL_GPL(debugfs_create_dir);
@@ -508,8 +506,8 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
return failed_creating(dentry);
}
inode->i_mode = S_IFLNK | S_IRWXUGO;
- inode->i_op = &debugfs_link_operations;
- inode->i_private = link;
+ inode->i_op = &simple_symlink_inode_operations;
+ inode->i_link = link;
d_instantiate(dentry, inode);
return end_creating(dentry);
}
@@ -519,12 +517,12 @@ static int __debugfs_remove(struct dentry *dentry, struct dentry *parent)
{
int ret = 0;
- if (debugfs_positive(dentry)) {
+ if (simple_positive(dentry)) {
dget(dentry);
- if (S_ISDIR(dentry->d_inode->i_mode))
- ret = simple_rmdir(parent->d_inode, dentry);
+ if (d_is_dir(dentry))
+ ret = simple_rmdir(d_inode(parent), dentry);
else
- simple_unlink(parent->d_inode, dentry);
+ simple_unlink(d_inode(parent), dentry);
if (!ret)
d_delete(dentry);
dput(dentry);
@@ -554,12 +552,12 @@ void debugfs_remove(struct dentry *dentry)
return;
parent = dentry->d_parent;
- if (!parent || !parent->d_inode)
+ if (!parent || d_really_is_negative(parent))
return;
- mutex_lock(&parent->d_inode->i_mutex);
+ mutex_lock(&d_inode(parent)->i_mutex);
ret = __debugfs_remove(dentry, parent);
- mutex_unlock(&parent->d_inode->i_mutex);
+ mutex_unlock(&d_inode(parent)->i_mutex);
if (!ret)
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
}
@@ -585,12 +583,12 @@ void debugfs_remove_recursive(struct dentry *dentry)
return;
parent = dentry->d_parent;
- if (!parent || !parent->d_inode)
+ if (!parent || d_really_is_negative(parent))
return;
parent = dentry;
down:
- mutex_lock(&parent->d_inode->i_mutex);
+ mutex_lock(&d_inode(parent)->i_mutex);
loop:
/*
* The parent->d_subdirs is protected by the d_lock. Outside that
@@ -599,13 +597,13 @@ void debugfs_remove_recursive(struct dentry *dentry)
*/
spin_lock(&parent->d_lock);
list_for_each_entry(child, &parent->d_subdirs, d_child) {
- if (!debugfs_positive(child))
+ if (!simple_positive(child))
continue;
/* perhaps simple_empty(child) makes more sense */
if (!list_empty(&child->d_subdirs)) {
spin_unlock(&parent->d_lock);
- mutex_unlock(&parent->d_inode->i_mutex);
+ mutex_unlock(&d_inode(parent)->i_mutex);
parent = child;
goto down;
}
@@ -620,16 +618,16 @@ void debugfs_remove_recursive(struct dentry *dentry)
* from d_subdirs. When releasing the parent->d_lock we can
* no longer trust that the next pointer is valid.
* Restart the loop. We'll skip this one with the
- * debugfs_positive() check.
+ * simple_positive() check.
*/
goto loop;
}
spin_unlock(&parent->d_lock);
- mutex_unlock(&parent->d_inode->i_mutex);
+ mutex_unlock(&d_inode(parent)->i_mutex);
child = parent;
parent = parent->d_parent;
- mutex_lock(&parent->d_inode->i_mutex);
+ mutex_lock(&d_inode(parent)->i_mutex);
if (child != dentry)
/* go up */
@@ -637,7 +635,7 @@ void debugfs_remove_recursive(struct dentry *dentry)
if (!__debugfs_remove(child, parent))
simple_release_fs(&debugfs_mount, &debugfs_mount_count);
- mutex_unlock(&parent->d_inode->i_mutex);
+ mutex_unlock(&d_inode(parent)->i_mutex);
}
EXPORT_SYMBOL_GPL(debugfs_remove_recursive);
@@ -669,27 +667,27 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
trap = lock_rename(new_dir, old_dir);
/* Source or destination directories don't exist? */
- if (!old_dir->d_inode || !new_dir->d_inode)
+ if (d_really_is_negative(old_dir) || d_really_is_negative(new_dir))
goto exit;
/* Source does not exist, cyclic rename, or mountpoint? */
- if (!old_dentry->d_inode || old_dentry == trap ||
+ if (d_really_is_negative(old_dentry) || old_dentry == trap ||
d_mountpoint(old_dentry))
goto exit;
dentry = lookup_one_len(new_name, new_dir, strlen(new_name));
/* Lookup failed, cyclic rename or target exists? */
- if (IS_ERR(dentry) || dentry == trap || dentry->d_inode)
+ if (IS_ERR(dentry) || dentry == trap || d_really_is_positive(dentry))
goto exit;
old_name = fsnotify_oldname_init(old_dentry->d_name.name);
- error = simple_rename(old_dir->d_inode, old_dentry, new_dir->d_inode,
+ error = simple_rename(d_inode(old_dir), old_dentry, d_inode(new_dir),
dentry);
if (error) {
fsnotify_oldname_free(old_name);
goto exit;
}
d_move(old_dentry, dentry);
- fsnotify_move(old_dir->d_inode, new_dir->d_inode, old_name,
+ fsnotify_move(d_inode(old_dir), d_inode(new_dir), old_name,
d_is_dir(old_dentry),
NULL, old_dentry);
fsnotify_oldname_free(old_name);
@@ -713,20 +711,17 @@ bool debugfs_initialized(void)
}
EXPORT_SYMBOL_GPL(debugfs_initialized);
-
-static struct kobject *debug_kobj;
-
static int __init debugfs_init(void)
{
int retval;
- debug_kobj = kobject_create_and_add("debug", kernel_kobj);
- if (!debug_kobj)
- return -EINVAL;
+ retval = sysfs_create_mount_point(kernel_kobj, "debug");
+ if (retval)
+ return retval;
retval = register_filesystem(&debug_fs_type);
if (retval)
- kobject_put(debug_kobj);
+ sysfs_remove_mount_point(kernel_kobj, "debug");
else
debugfs_registered = true;
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-04 14:46:14 +0300