#ifndef __LINUX_GENERIC_NETLINK_H #define __LINUX_GENERIC_NETLINK_H #include <linux/types.h> #include <linux/netlink.h> #define GENL_NAMSIZ 16 /* length of family name */ #define GENL_MIN_ID NLMSG_MIN_TYPE #define GENL_MAX_ID 1023 struct genlmsghdr { __u8 cmd; __u8 version; __u16 reserved; }; #define GENL_HDRLEN NLMSG_ALIGN(sizeof(struct genlmsghdr)) #define GENL_ADMIN_PERM 0x01 #define GENL_CMD_CAP_DO 0x02 #define GENL_CMD_CAP_DUMP 0x04 #define GENL_CMD_CAP_HASPOL 0x08 /* * List of reserved static generic netlink identifiers: */ #define GENL_ID_GENERATE 0 #define GENL_ID_CTRL NLMSG_MIN_TYPE /************************************************************************** * Controller **************************************************************************/ enum { CTRL_CMD_UNSPEC, CTRL_CMD_NEWFAMILY, CTRL_CMD_DELFAMILY, CTRL_CMD_GETFAMILY, CTRL_CMD_NEWOPS, CTRL_CMD_DELOPS, CTRL_CMD_GETOPS, CTRL_CMD_NEWMCAST_GRP, CTRL_CMD_DELMCAST_GRP, CTRL_CMD_GETMCAST_GRP, /* unused */ __CTRL_CMD_MAX, }; #define CTRL_CMD_MAX (__CTRL_CMD_MAX - 1) enum { CTRL_ATTR_UNSPEC, CTRL_ATTR_FAMILY_ID, CTRL_ATTR_FAMILY_NAME, CTRL_ATTR_VERSION, CTRL_ATTR_HDRSIZE, CTRL_ATTR_MAXATTR, CTRL_ATTR_OPS, CTRL_ATTR_MCAST_GROUPS, __CTRL_ATTR_MAX, }; #define CTRL_ATTR_MAX (__CTRL_ATTR_MAX - 1) enum { CTRL_ATTR_OP_UNSPEC, CTRL_ATTR_OP_ID, CTRL_ATTR_OP_FLAGS, __CTRL_ATTR_OP_MAX, }; #define CTRL_ATTR_OP_MAX (__CTRL_ATTR_OP_MAX - 1) enum { CTRL_ATTR_MCAST_GRP_UNSPEC, CTRL_ATTR_MCAST_GRP_NAME, CTRL_ATTR_MCAST_GRP_ID, __CTRL_ATTR_MCAST_GRP_MAX, }; #define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1) #ifdef __KERNEL__ /* All generic netlink requests are serialized by a global lock. */ extern void genl_lock(void); extern void genl_unlock(void); #ifdef CONFIG_PROVE_LOCKING extern int lockdep_genl_is_held(void); #endif /** * rcu_dereference_genl - rcu_dereference with debug checking * @p: The pointer to read, prior to dereferencing * * Do an rcu_dereference(p), but check caller either holds rcu_read_lock() * or genl mutex. Note : Please prefer genl_dereference() or rcu_dereference() */ #define rcu_dereference_genl(p) \ rcu_dereference_check(p, lockdep_genl_is_held()) /** * genl_dereference - fetch RCU pointer when updates are prevented by genl mutex * @p: The pointer to read, prior to dereferencing * * Return the value of the specified RCU-protected pointer, but omit * both the smp_read_barrier_depends() and the ACCESS_ONCE(), because * caller holds genl mutex. */ #define genl_dereference(p) \ rcu_dereference_protected(p, lockdep_genl_is_held()) #endif /* __KERNEL__ */ #endif /* __LINUX_GENERIC_NETLINK_H */