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debugfs: fold debugfs_create_by_name() into the only caller 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-09 20:33:28 -04:00
parent c3b1a35084
commit cfa57c11b0
1 changed files with 31 additions and 44 deletions
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75
fs/debugfs/inode.c
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@ -293,48 +293,6 @@ static struct file_system_type debug_fs_type = {
.kill_sb = kill_litter_super,
};
static int debugfs_create_by_name(const char *name, umode_t mode,
struct dentry *parent,
struct dentry **dentry,
void *data,
const struct file_operations *fops)
{
int error = 0;
/* If the parent is not specified, we create it in the root.
* We need the root dentry to do this, which is in the super
* block. A pointer to that is in the struct vfsmount that we
* have around.
*/
if (!parent)
parent = debugfs_mount->mnt_root;
*dentry = NULL;
mutex_lock(&parent->d_inode->i_mutex);
*dentry = lookup_one_len(name, parent, strlen(name));
if (!IS_ERR(*dentry)) {
switch (mode & S_IFMT) {
case S_IFDIR:
error = debugfs_mkdir(parent->d_inode, *dentry, mode,
data, fops);
break;
case S_IFLNK:
error = debugfs_link(parent->d_inode, *dentry, mode,
data, fops);
break;
default:
error = debugfs_create(parent->d_inode, *dentry, mode,
data, fops);
break;
}
dput(*dentry);
} else
error = PTR_ERR(*dentry);
mutex_unlock(&parent->d_inode->i_mutex);
return error;
}
struct dentry *__create_file(const char *name, umode_t mode,
struct dentry *parent, void *data,
const struct file_operations *fops)
@ -349,8 +307,37 @@ struct dentry *__create_file(const char *name, umode_t mode,
if (error)
goto exit;
error = debugfs_create_by_name(name, mode, parent, &dentry,
data, fops);
/* If the parent is not specified, we create it in the root.
* We need the root dentry to do this, which is in the super
* block. A pointer to that is in the struct vfsmount that we
* have around.
*/
if (!parent)
parent = debugfs_mount->mnt_root;
dentry = NULL;
mutex_lock(&parent->d_inode->i_mutex);
dentry = lookup_one_len(name, parent, strlen(name));
if (!IS_ERR(dentry)) {
switch (mode & S_IFMT) {
case S_IFDIR:
error = debugfs_mkdir(parent->d_inode, dentry, mode,
data, fops);
break;
case S_IFLNK:
error = debugfs_link(parent->d_inode, dentry, mode,
data, fops);
break;
default:
error = debugfs_create(parent->d_inode, dentry, mode,
data, fops);
break;
}
dput(dentry);
} else
error = PTR_ERR(dentry);
mutex_unlock(&parent->d_inode->i_mutex);
if (error) {
dentry = NULL;
simple_release_fs(&debugfs_mount, &debugfs_mount_count);