net_device_attributes
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net_device_attributes [2018/08/01 14:48] rpjday [/sys/class/net/enp3s0/ files] |
net_device_attributes [2018/08/01 15:05] rpjday |
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| -r--r--r--. 1 root root 4096 Aug 1 10:41 operstate [up or down] | -r--r--r--. 1 root root 4096 Aug 1 10:41 operstate [up or down] | ||
| -rw-r--r--. 1 root root 4096 Aug 1 10:41 flags | -rw-r--r--. 1 root root 4096 Aug 1 10:41 flags | ||
| + | </code> | ||
| + | |||
| + | ===== flags ===== | ||
| + | |||
| + | ==== include/uapi/linux/if.h ==== | ||
| + | |||
| + | <code> | ||
| + | /** | ||
| + | * enum net_device_flags - &struct net_device flags | ||
| + | * | ||
| + | * These are the &struct net_device flags, they can be set by drivers, the | ||
| + | * kernel and some can be triggered by userspace. Userspace can query and | ||
| + | * set these flags using userspace utilities but there is also a sysfs | ||
| + | * entry available for all dev flags which can be queried and set. These flags | ||
| + | * are shared for all types of net_devices. The sysfs entries are available | ||
| + | * via /sys/class/net/<dev>/flags. Flags which can be toggled through sysfs | ||
| + | * are annotated below, note that only a few flags can be toggled and some | ||
| + | * other flags are always always preserved from the original net_device flags | ||
| + | * even if you try to set them via sysfs. Flags which are always preserved | ||
| + | * are kept under the flag grouping @IFF_VOLATILE. Flags which are volatile | ||
| + | * are annotated below as such. | ||
| + | * | ||
| + | * You should have a pretty good reason to be extending these flags. | ||
| + | * | ||
| + | * @IFF_UP: interface is up. Can be toggled through sysfs. | ||
| + | * @IFF_BROADCAST: broadcast address valid. Volatile. | ||
| + | * @IFF_DEBUG: turn on debugging. Can be toggled through sysfs. | ||
| + | * @IFF_LOOPBACK: is a loopback net. Volatile. | ||
| + | * @IFF_POINTOPOINT: interface is has p-p link. Volatile. | ||
| + | * @IFF_NOTRAILERS: avoid use of trailers. Can be toggled through sysfs. | ||
| + | * Volatile. | ||
| + | * @IFF_RUNNING: interface RFC2863 OPER_UP. Volatile. | ||
| + | * @IFF_NOARP: no ARP protocol. Can be toggled through sysfs. Volatile. | ||
| + | * @IFF_PROMISC: receive all packets. Can be toggled through sysfs. | ||
| + | * @IFF_ALLMULTI: receive all multicast packets. Can be toggled through | ||
| + | * sysfs. | ||
| + | * @IFF_MASTER: master of a load balancer. Volatile. | ||
| + | * @IFF_SLAVE: slave of a load balancer. Volatile. | ||
| + | * @IFF_MULTICAST: Supports multicast. Can be toggled through sysfs. | ||
| + | * @IFF_PORTSEL: can set media type. Can be toggled through sysfs. | ||
| + | * @IFF_AUTOMEDIA: auto media select active. Can be toggled through sysfs. | ||
| + | * @IFF_DYNAMIC: dialup device with changing addresses. Can be toggled | ||
| + | * through sysfs. | ||
| + | * @IFF_LOWER_UP: driver signals L1 up. Volatile. | ||
| + | * @IFF_DORMANT: driver signals dormant. Volatile. | ||
| + | * @IFF_ECHO: echo sent packets. Volatile. | ||
| + | */ | ||
| + | enum net_device_flags { | ||
| + | IFF_UP = 1<<0, /* sysfs */ | ||
| + | IFF_BROADCAST = 1<<1, /* volatile */ | ||
| + | IFF_DEBUG = 1<<2, /* sysfs */ | ||
| + | IFF_LOOPBACK = 1<<3, /* volatile */ | ||
| + | IFF_POINTOPOINT = 1<<4, /* volatile */ | ||
| + | IFF_NOTRAILERS = 1<<5, /* sysfs */ | ||
| + | IFF_RUNNING = 1<<6, /* volatile */ | ||
| + | IFF_NOARP = 1<<7, /* sysfs */ | ||
| + | IFF_PROMISC = 1<<8, /* sysfs */ | ||
| + | IFF_ALLMULTI = 1<<9, /* sysfs */ | ||
| + | IFF_MASTER = 1<<10, /* volatile */ | ||
| + | IFF_SLAVE = 1<<11, /* volatile */ | ||
| + | IFF_MULTICAST = 1<<12, /* sysfs */ | ||
| + | IFF_PORTSEL = 1<<13, /* sysfs */ | ||
| + | IFF_AUTOMEDIA = 1<<14, /* sysfs */ | ||
| + | IFF_DYNAMIC = 1<<15, /* sysfs */ | ||
| + | IFF_LOWER_UP = 1<<16, /* volatile */ | ||
| + | IFF_DORMANT = 1<<17, /* volatile */ | ||
| + | IFF_ECHO = 1<<18, /* volatile */ | ||
| + | }; | ||
| + | |||
| + | #define IFF_UP IFF_UP | ||
| + | #define IFF_BROADCAST IFF_BROADCAST | ||
| + | #define IFF_DEBUG IFF_DEBUG | ||
| + | #define IFF_LOOPBACK IFF_LOOPBACK | ||
| + | #define IFF_POINTOPOINT IFF_POINTOPOINT | ||
| + | #define IFF_NOTRAILERS IFF_NOTRAILERS | ||
| + | #define IFF_RUNNING IFF_RUNNING | ||
| + | #define IFF_NOARP IFF_NOARP | ||
| + | #define IFF_PROMISC IFF_PROMISC | ||
| + | #define IFF_ALLMULTI IFF_ALLMULTI | ||
| + | #define IFF_MASTER IFF_MASTER | ||
| + | #define IFF_SLAVE IFF_SLAVE | ||
| + | #define IFF_MULTICAST IFF_MULTICAST | ||
| + | #define IFF_PORTSEL IFF_PORTSEL | ||
| + | #define IFF_AUTOMEDIA IFF_AUTOMEDIA | ||
| + | #define IFF_DYNAMIC IFF_DYNAMIC | ||
| + | #define IFF_LOWER_UP IFF_LOWER_UP | ||
| + | #define IFF_DORMANT IFF_DORMANT | ||
| + | #define IFF_ECHO IFF_ECHO | ||
| + | |||
| + | #define IFF_VOLATILE (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|\ | ||
| + | IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT) | ||
| </code> | </code> | ||
net_device_attributes.txt ยท Last modified: 2018/08/01 15:05 by rpjday
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