[ATM]: basic sysfs support for ATM devices
Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 1eb238a..41788a3 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -7,6 +7,7 @@
#define LINUX_ATMDEV_H
+#include <linux/device.h>
#include <linux/atmapi.h>
#include <linux/atm.h>
#include <linux/atmioc.h>
@@ -358,6 +359,7 @@
struct proc_dir_entry *proc_entry; /* proc entry */
char *proc_name; /* proc entry name */
#endif
+ struct class_device class_dev; /* sysfs class device */
struct list_head dev_list; /* linkage */
};
@@ -459,7 +461,7 @@
BUG_ON(!test_bit(ATM_DF_REMOVED, &dev->flags));
if (dev->ops->dev_close)
dev->ops->dev_close(dev);
- kfree(dev);
+ class_device_put(&dev->class_dev);
}
}
diff --git a/net/atm/Makefile b/net/atm/Makefile
index d581875..89656d6 100644
--- a/net/atm/Makefile
+++ b/net/atm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the ATM Protocol Families.
#
-atm-y := addr.o pvc.o signaling.o svc.o ioctl.o common.o atm_misc.o raw.o resources.o
+atm-y := addr.o pvc.o signaling.o svc.o ioctl.o common.o atm_misc.o raw.o resources.o atm_sysfs.o
mpoa-objs := mpc.o mpoa_caches.o mpoa_proc.o
obj-$(CONFIG_ATM) += atm.o
diff --git a/net/atm/atm_sysfs.c b/net/atm/atm_sysfs.c
new file mode 100644
index 0000000..5df4b9a
--- /dev/null
+++ b/net/atm/atm_sysfs.c
@@ -0,0 +1,176 @@
+/* ATM driver model support. */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/kobject.h>
+#include <linux/atmdev.h>
+#include "common.h"
+#include "resources.h"
+
+#define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
+
+static ssize_t show_type(struct class_device *cdev, char *buf)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+ return sprintf(buf, "%s\n", adev->type);
+}
+
+static ssize_t show_address(struct class_device *cdev, char *buf)
+{
+ char *pos = buf;
+ struct atm_dev *adev = to_atm_dev(cdev);
+ int i;
+
+ for (i = 0; i < (ESI_LEN - 1); i++)
+ pos += sprintf(pos, "%02x:", adev->esi[i]);
+ pos += sprintf(pos, "%02x\n", adev->esi[i]);
+
+ return pos - buf;
+}
+
+static ssize_t show_atmaddress(struct class_device *cdev, char *buf)
+{
+ unsigned long flags;
+ char *pos = buf;
+ struct atm_dev *adev = to_atm_dev(cdev);
+ struct atm_dev_addr *aaddr;
+ int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin;
+ int i, j;
+
+ spin_lock_irqsave(&adev->lock, flags);
+ list_for_each_entry(aaddr, &adev->local, entry) {
+ for(i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) {
+ if (j == *fmt) {
+ pos += sprintf(pos, ".");
+ ++fmt;
+ j = 0;
+ }
+ pos += sprintf(pos, "%02x", aaddr->addr.sas_addr.prv[i]);
+ }
+ pos += sprintf(pos, "\n");
+ }
+ spin_unlock_irqrestore(&adev->lock, flags);
+
+ return pos - buf;
+}
+
+static ssize_t show_carrier(struct class_device *cdev, char *buf)
+{
+ char *pos = buf;
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ pos += sprintf(pos, "%d\n",
+ adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
+
+ return pos - buf;
+}
+
+static ssize_t show_link_rate(struct class_device *cdev, char *buf)
+{
+ char *pos = buf;
+ struct atm_dev *adev = to_atm_dev(cdev);
+ int link_rate;
+
+ /* show the link rate, not the data rate */
+ switch (adev->link_rate) {
+ case ATM_OC3_PCR:
+ link_rate = 155520000;
+ break;
+ case ATM_OC12_PCR:
+ link_rate = 622080000;
+ break;
+ case ATM_25_PCR:
+ link_rate = 25600000;
+ break;
+ default:
+ link_rate = adev->link_rate * 8 * 53;
+ }
+ pos += sprintf(pos, "%d\n", link_rate);
+
+ return pos - buf;
+}
+
+static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
+static CLASS_DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL);
+static CLASS_DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
+static CLASS_DEVICE_ATTR(type, S_IRUGO, show_type, NULL);
+static CLASS_DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL);
+
+static struct class_device_attribute *atm_attrs[] = {
+ &class_device_attr_atmaddress,
+ &class_device_attr_address,
+ &class_device_attr_carrier,
+ &class_device_attr_type,
+ &class_device_attr_link_rate,
+ NULL
+};
+
+static int atm_uevent(struct class_device *cdev, char **envp, int num_envp, char *buf, int size)
+{
+ struct atm_dev *adev;
+ int i = 0, len = 0;
+
+ if (!cdev)
+ return -ENODEV;
+
+ adev = to_atm_dev(cdev);
+ if (!adev)
+ return -ENODEV;
+
+ if (add_uevent_var(envp, num_envp, &i, buf, size, &len,
+ "NAME=%s%d", adev->type, adev->number))
+ return -ENOMEM;
+
+ envp[i] = NULL;
+ return 0;
+}
+
+static void atm_release(struct class_device *cdev)
+{
+ struct atm_dev *adev = to_atm_dev(cdev);
+
+ kfree(adev);
+}
+
+static struct class atm_class = {
+ .name = "atm",
+ .release = atm_release,
+ .uevent = atm_uevent,
+};
+
+int atm_register_sysfs(struct atm_dev *adev)
+{
+ struct class_device *cdev = &adev->class_dev;
+ int i, err;
+
+ cdev->class = &atm_class;
+ class_set_devdata(cdev, adev);
+
+ snprintf(cdev->class_id, BUS_ID_SIZE, "%s%d", adev->type, adev->number);
+ err = class_device_register(cdev);
+ if (err < 0)
+ return err;
+
+ for (i = 0; atm_attrs[i]; i++)
+ class_device_create_file(cdev, atm_attrs[i]);
+
+ return 0;
+}
+
+void atm_unregister_sysfs(struct atm_dev *adev)
+{
+ struct class_device *cdev = &adev->class_dev;
+
+ class_device_del(cdev);
+}
+
+int __init atm_sysfs_init(void)
+{
+ return class_register(&atm_class);
+}
+
+void __exit atm_sysfs_exit(void)
+{
+ class_unregister(&atm_class);
+}
diff --git a/net/atm/common.c b/net/atm/common.c
index ae00222..35ab1a6 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -791,8 +791,14 @@
printk(KERN_ERR "atm_proc_init() failed with %d\n",error);
goto out_atmsvc_exit;
}
+ if ((error = atm_sysfs_init()) < 0) {
+ printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error);
+ goto out_atmproc_exit;
+ }
out:
return error;
+out_atmproc_exit:
+ atm_proc_exit();
out_atmsvc_exit:
atmsvc_exit();
out_atmpvc_exit:
@@ -805,6 +811,7 @@
static void __exit atm_exit(void)
{
atm_proc_exit();
+ atm_sysfs_exit();
atmsvc_exit();
atmpvc_exit();
proto_unregister(&vcc_proto);
diff --git a/net/atm/common.h b/net/atm/common.h
index 4887c31..a422da7 100644
--- a/net/atm/common.h
+++ b/net/atm/common.h
@@ -28,6 +28,8 @@
void atmpvc_exit(void);
int atmsvc_init(void);
void atmsvc_exit(void);
+int atm_sysfs_init(void);
+void atm_sysfs_exit(void);
#ifdef CONFIG_PROC_FS
int atm_proc_init(void);
diff --git a/net/atm/resources.c b/net/atm/resources.c
index 18ac806..534baf7 100644
--- a/net/atm/resources.c
+++ b/net/atm/resources.c
@@ -114,14 +114,27 @@
printk(KERN_ERR "atm_dev_register: "
"atm_proc_dev_register failed for dev %s\n",
type);
- mutex_unlock(&atm_dev_mutex);
- kfree(dev);
- return NULL;
+ goto out_fail;
}
- list_add_tail(&dev->dev_list, &atm_devs);
- mutex_unlock(&atm_dev_mutex);
+ if (atm_register_sysfs(dev) < 0) {
+ printk(KERN_ERR "atm_dev_register: "
+ "atm_register_sysfs failed for dev %s\n",
+ type);
+ atm_proc_dev_deregister(dev);
+ goto out_fail;
+ }
+
+ list_add_tail(&dev->dev_list, &atm_devs);
+
+out:
+ mutex_unlock(&atm_dev_mutex);
return dev;
+
+out_fail:
+ kfree(dev);
+ dev = NULL;
+ goto out;
}
@@ -140,6 +153,7 @@
mutex_unlock(&atm_dev_mutex);
atm_dev_release_vccs(dev);
+ atm_unregister_sysfs(dev);
atm_proc_dev_deregister(dev);
atm_dev_put(dev);
diff --git a/net/atm/resources.h b/net/atm/resources.h
index ac7222f..6449899 100644
--- a/net/atm/resources.h
+++ b/net/atm/resources.h
@@ -43,4 +43,6 @@
#endif /* CONFIG_PROC_FS */
+int atm_register_sysfs(struct atm_dev *adev);
+void atm_unregister_sysfs(struct atm_dev *adev);
#endif
