diff options
| -rw-r--r-- | include/linux/ethtool.h | 30 | ||||
| -rw-r--r-- | net/core/ethtool.c | 55 |
2 files changed, 82 insertions, 3 deletions
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index ead7dcb1bf1e..c04d1316d221 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -663,6 +663,22 @@ struct ethtool_rx_ntuple_list { unsigned int count; }; +/** + * enum ethtool_phys_id_state - indicator state for physical identification + * @ETHTOOL_ID_INACTIVE: Physical ID indicator should be deactivated + * @ETHTOOL_ID_ACTIVE: Physical ID indicator should be activated + * @ETHTOOL_ID_ON: LED should be turned on (used iff %ETHTOOL_ID_ACTIVE + * is not supported) + * @ETHTOOL_ID_OFF: LED should be turned off (used iff %ETHTOOL_ID_ACTIVE + * is not supported) + */ +enum ethtool_phys_id_state { + ETHTOOL_ID_INACTIVE, + ETHTOOL_ID_ACTIVE, + ETHTOOL_ID_ON, + ETHTOOL_ID_OFF +}; + struct net_device; /* Some generic methods drivers may use in their ethtool_ops */ @@ -741,7 +757,18 @@ bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported); * segmentation offload on or off. Returns a negative error code or zero. * @self_test: Run specified self-tests * @get_strings: Return a set of strings that describe the requested objects - * @phys_id: Identify the physical device, e.g. by flashing an LED + * @set_phys_id: Identify the physical devices, e.g. by flashing an LED + * attached to it. The implementation may update the indicator + * asynchronously or synchronously, but in either case it must return + * quickly. It is initially called with the argument %ETHTOOL_ID_ACTIVE, + * and must either activate asynchronous updates or return -%EINVAL. + * If it returns -%EINVAL then it will be called again at intervals with + * argument %ETHTOOL_ID_ON or %ETHTOOL_ID_OFF and should set the state of + * the indicator accordingly. Finally, it is called with the argument + * %ETHTOOL_ID_INACTIVE and must deactivate the indicator. Returns a + * negative error code or zero. + * @phys_id: Deprecated in favour of @set_phys_id. + * Identify the physical device, e.g. by flashing an LED * attached to it until interrupted by a signal or the given time * (in seconds) elapses. If the given time is zero, use a default * time limit. Returns a negative error code or zero. Being @@ -830,6 +857,7 @@ struct ethtool_ops { int (*set_tso)(struct net_device *, u32); void (*self_test)(struct net_device *, struct ethtool_test *, u64 *); void (*get_strings)(struct net_device *, u32 stringset, u8 *); + int (*set_phys_id)(struct net_device *, enum ethtool_phys_id_state); int (*phys_id)(struct net_device *, u32); void (*get_ethtool_stats)(struct net_device *, struct ethtool_stats *, u64 *); diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 74ead9eca126..1c95f0fb8b3a 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -21,6 +21,8 @@ #include <linux/uaccess.h> #include <linux/vmalloc.h> #include <linux/slab.h> +#include <linux/rtnetlink.h> +#include <linux/sched.h> /* * Some useful ethtool_ops methods that're device independent. @@ -1618,14 +1620,63 @@ out: static int ethtool_phys_id(struct net_device *dev, void __user *useraddr) { struct ethtool_value id; + static bool busy; + int rc; - if (!dev->ethtool_ops->phys_id) + if (!dev->ethtool_ops->set_phys_id && !dev->ethtool_ops->phys_id) return -EOPNOTSUPP; + if (busy) + return -EBUSY; + if (copy_from_user(&id, useraddr, sizeof(id))) return -EFAULT; - return dev->ethtool_ops->phys_id(dev, id.data); + if (!dev->ethtool_ops->set_phys_id) + /* Do it the old way */ + return dev->ethtool_ops->phys_id(dev, id.data); + + rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE); + if (rc && rc != -EINVAL) + return rc; + + /* Drop the RTNL lock while waiting, but prevent reentry or + * removal of the device. + */ + busy = true; + dev_hold(dev); + rtnl_unlock(); + + if (rc == 0) { + /* Driver will handle this itself */ + schedule_timeout_interruptible( + id.data ? id.data : MAX_SCHEDULE_TIMEOUT); + } else { + /* Driver expects to be called periodically */ + do { + rtnl_lock(); + rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ON); + rtnl_unlock(); + if (rc) + break; + schedule_timeout_interruptible(HZ / 2); + + rtnl_lock(); + rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_OFF); + rtnl_unlock(); + if (rc) + break; + schedule_timeout_interruptible(HZ / 2); + } while (!signal_pending(current) && + (id.data == 0 || --id.data != 0)); + } + + rtnl_lock(); + dev_put(dev); + busy = false; + + (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE); + return rc; } static int ethtool_get_stats(struct net_device *dev, void __user *useraddr) |