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blk-mq-debugfs: use debugfs_get_aux()

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instead of manually stashing the data pointer into parent directory inode's
->i_private, just pass it to debugfs_create_file_aux() so that it can
be extracted without that insane chasing through ->d_parent.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lore.kernel.org/r/20250702212818.GJ3406663@ZenIV
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Al Viro 2025-07-02 22:28:18 +01:00 • committed by Greg Kroah-Hartman
parent 9d3b96be2e
commit 4c0727e568
1 changed files with 5 additions and 7 deletions
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12
block/blk-mq-debugfs.c
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@ -521,7 +521,7 @@ CTX_RQ_SEQ_OPS(poll, HCTX_TYPE_POLL);
static int blk_mq_debugfs_show(struct seq_file *m, void *v)
{
const struct blk_mq_debugfs_attr *attr = m->private;
void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private;
void *data = debugfs_get_aux(m->file);
return attr->show(data, m);
}
@ -531,7 +531,7 @@ static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf,
{
struct seq_file *m = file->private_data;
const struct blk_mq_debugfs_attr *attr = m->private;
void *data = d_inode(file->f_path.dentry->d_parent)->i_private;
void *data = debugfs_get_aux(file);
/*
* Attributes that only implement .seq_ops are read-only and 'attr' is
@ -546,7 +546,7 @@ static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf,
static int blk_mq_debugfs_open(struct inode *inode, struct file *file)
{
const struct blk_mq_debugfs_attr *attr = inode->i_private;
void *data = d_inode(file->f_path.dentry->d_parent)->i_private;
void *data = debugfs_get_aux(file);
struct seq_file *m;
int ret;
@ -612,11 +612,9 @@ static void debugfs_create_files(struct dentry *parent, void *data,
if (IS_ERR_OR_NULL(parent))
return;
d_inode(parent)->i_private = data;
for (; attr->name; attr++)
debugfs_create_file(attr->name, attr->mode, parent,
(void *)attr, &blk_mq_debugfs_fops);
debugfs_create_file_aux(attr->name, attr->mode, parent,
(void *)attr, data, &blk_mq_debugfs_fops);
}
void blk_mq_debugfs_register(struct request_queue *q)