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42 lines
1.3 KiB
42 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __LINUX_GENERIC_NETLINK_H |
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#define __LINUX_GENERIC_NETLINK_H |
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#include <uapi/linux/genetlink.h> |
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/* All generic netlink requests are serialized by a global lock. */ |
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extern void genl_lock(void); |
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extern void genl_unlock(void); |
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#ifdef CONFIG_LOCKDEP |
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extern bool lockdep_genl_is_held(void); |
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#endif |
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/* for synchronisation between af_netlink and genetlink */ |
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extern atomic_t genl_sk_destructing_cnt; |
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extern wait_queue_head_t genl_sk_destructing_waitq; |
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/** |
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* rcu_dereference_genl - rcu_dereference with debug checking |
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* @p: The pointer to read, prior to dereferencing |
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* |
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* Do an rcu_dereference(p), but check caller either holds rcu_read_lock() |
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* or genl mutex. Note : Please prefer genl_dereference() or rcu_dereference() |
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*/ |
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#define rcu_dereference_genl(p) \ |
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rcu_dereference_check(p, lockdep_genl_is_held()) |
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/** |
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* genl_dereference - fetch RCU pointer when updates are prevented by genl mutex |
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* @p: The pointer to read, prior to dereferencing |
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* |
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* Return the value of the specified RCU-protected pointer, but omit |
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* the READ_ONCE(), because caller holds genl mutex. |
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*/ |
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#define genl_dereference(p) \ |
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rcu_dereference_protected(p, lockdep_genl_is_held()) |
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#define MODULE_ALIAS_GENL_FAMILY(family)\ |
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MODULE_ALIAS_NET_PF_PROTO_NAME(PF_NETLINK, NETLINK_GENERIC, "-family-" family) |
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#endif /* __LINUX_GENERIC_NETLINK_H */
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