Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 826ff0de authored by Catherine Sullivan's avatar Catherine Sullivan Committed by Jeff Kirsher
Browse files

ixgbe: added netdev_ops file to debugfs 



Added the netdev_ops file to debugfs with a command to call the
ndo_tx_timeout function to give users the ability to simulate a
tx_timeout call made by the kernel.

Signed-off-by: default avatarCatherine Sullivan <catherine.sullivan@intel.com>
Tested-by: default avatarPhil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent 00949167

drivers/net/ethernet/intel/ixgbe/ixgbe_debugfs.c

+105 −2
Original line number Diff line number Diff line
@@ -34,6 +34,102 @@ 


static struct dentry *ixgbe_dbg_root;



static char ixgbe_dbg_netdev_ops_buf[256] = "";



/**

 * ixgbe_dbg_netdev_ops_open - prep the debugfs netdev_ops data item

 * @inode: inode that was opened

 * @filp: file info

 *

 * Stash the adapter pointer hiding in the inode into the file pointer

 * where we can find it later in the read and write calls

 **/

static int ixgbe_dbg_netdev_ops_open(struct inode *inode, struct file *filp)

{

	filp->private_data = inode->i_private;

	return 0;

}



/**

 * ixgbe_dbg_netdev_ops_read - read for netdev_ops datum

 * @filp: the opened file

 * @buffer: where to write the data for the user to read

 * @count: the size of the user's buffer

 * @ppos: file position offset

 **/

static ssize_t ixgbe_dbg_netdev_ops_read(struct file *filp,

					 char __user *buffer,

					 size_t count, loff_t *ppos)

{

	struct ixgbe_adapter *adapter = filp->private_data;

	char buf[256];

	int bytes_not_copied;

	int len;



	/* don't allow partial reads */

	if (*ppos != 0)

		return 0;



	len = snprintf(buf, sizeof(buf), "%s: %s\n",

		       adapter->netdev->name, ixgbe_dbg_netdev_ops_buf);

	if (count < len)

		return -ENOSPC;

	bytes_not_copied = copy_to_user(buffer, buf, len);

	if (bytes_not_copied < 0)

		return bytes_not_copied;



	*ppos = len;

	return len;

}



/**

 * ixgbe_dbg_netdev_ops_write - write into netdev_ops datum

 * @filp: the opened file

 * @buffer: where to find the user's data

 * @count: the length of the user's data

 * @ppos: file position offset

 **/

static ssize_t ixgbe_dbg_netdev_ops_write(struct file *filp,

					  const char __user *buffer,

					  size_t count, loff_t *ppos)

{

	struct ixgbe_adapter *adapter = filp->private_data;

	int bytes_not_copied;



	/* don't allow partial writes */

	if (*ppos != 0)

		return 0;

	if (count >= sizeof(ixgbe_dbg_netdev_ops_buf))

		return -ENOSPC;



	bytes_not_copied = copy_from_user(ixgbe_dbg_netdev_ops_buf,

					  buffer, count);

	if (bytes_not_copied < 0)

		return bytes_not_copied;

	else if (bytes_not_copied < count)

		count -= bytes_not_copied;

	else

		return -ENOSPC;

	ixgbe_dbg_netdev_ops_buf[count] = '\0';



	if (strncmp(ixgbe_dbg_netdev_ops_buf, "tx_timeout", 10) == 0) {

		adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev);

		e_dev_info("tx_timeout called\n");

	} else {

		e_dev_info("Unknown command: %s\n", ixgbe_dbg_netdev_ops_buf);

		e_dev_info("Available commands:\n");

		e_dev_info("    tx_timeout\n");

	}

	return count;

}



static const struct file_operations ixgbe_dbg_netdev_ops_fops = {

	.owner = THIS_MODULE,

	.open = ixgbe_dbg_netdev_ops_open,

	.read = ixgbe_dbg_netdev_ops_read,

	.write = ixgbe_dbg_netdev_ops_write,

};



/**

 * ixgbe_dbg_adapter_init - setup the debugfs directory for the adapter

 * @adapter: the adapter that is starting up
@@ -41,11 +137,18 @@ static struct dentry *ixgbe_dbg_root; 
void ixgbe_dbg_adapter_init(struct ixgbe_adapter *adapter)

{

	const char *name = pci_name(adapter->pdev);



	struct dentry *pfile;

	adapter->ixgbe_dbg_adapter = debugfs_create_dir(name, ixgbe_dbg_root);

	if (!adapter->ixgbe_dbg_adapter)

	if (adapter->ixgbe_dbg_adapter) {

		pfile = debugfs_create_file("netdev_ops", 0600,

					    adapter->ixgbe_dbg_adapter, adapter,

					    &ixgbe_dbg_netdev_ops_fops);

		if (!pfile)

			e_dev_err("debugfs netdev_ops for %s failed\n", name);

	} else {

		e_dev_err("debugfs entry for %s failed\n", name);

	}

}



/**

 * ixgbe_dbg_adapter_exit - clear out the adapter's debugfs entries