Re: [PATCH V6 net-next 1/7] net: hibmcge: Add debugfs supported in this module
From: Jijie Shao
Date: Wed Dec 11 2024 - 20:35:39 EST
on 2024/12/11 22:00, Jakub Kicinski wrote:
On Tue, 10 Dec 2024 21:48:49 +0800 Jijie Shao wrote:
+ debugfs_create_devm_seqfile(dev, hbg_dbg_infos[i].name,
+ root, hbg_dbg_infos[i].read);
Like I said last time, if you devm_ the entire folder you don't have to
devm_ each individual file. debugfs_remove_recursive() removes all files
under specified directory.
Sorry, there's something wrong with the format of the last reply.
I think debugfs_create_devm_seqfile() is a better choice,
if not use it, I might need to code like so:
static const struct file_operations hbg_dbg_fops = {
.owner = THIS_MODULE,
...
};
static int hbg_dbg_file_init(struct hbg_priv *priv, u32 cmd, const char *name)
{
struct hbg_dbg_pri_data *data;
data = devm_kzalloc(&priv->pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->priv = priv;
data->cmd = cmd;
debugfs_create_file(name, HBG_DBG_FILE_MODE,
priv->debugfs.root, data, &hbg_dbg_fops);
return 0;
}
int hbg_debugfs_init(struct hbg_priv *priv)
{
...
for (i = 0; i < ARRAY_SIZE(hbg_dbg_infos); i++) {
ret = hbg_dbg_file_init(priv, i, hbg_dbg_infos[i].name);
...
}
But use debugfs_create_devm_seqfile(), I only need:
void hbg_debugfs_init(struct hbg_priv *priv)
{
...
for (i = 0; i < ARRAY_SIZE(hbg_dbg_infos); i++)
debugfs_create_devm_seqfile(dev, hbg_dbg_infos[i].name,
root, hbg_dbg_infos[i].read);
Actually I think debugfs_create_devm_seqfile() is actually similar to hbg_dbg_file_init().
And in debugfs_create_devm_seqfile(), debugfs_create_file() is also called, and the code is simplified.
Thanks,
Jijie Shao