| 1 |
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| 2 | |
| 3 | * include/net/dsa_stubs.h - Stubs for the Distributed Switch Architecture framework
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| 4 |
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| 5 |
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| 6 | #include <linux/mutex.h>
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| 7 | #include <linux/netdevice.h>
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| 8 | #include <linux/net_tstamp.h>
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| 9 | #include <net/dsa.h>
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| 10 |
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| 11 | #if IS_ENABLED(CONFIG_NET_DSA)
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| 12 |
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| 13 | extern const struct dsa_stubs *dsa_stubs;
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| 14 |
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| 15 | struct dsa_stubs {
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| 16 | int (*conduit_hwtstamp_validate)(struct net_device *dev,
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| 17 | const struct kernel_hwtstamp_config *config,
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| 18 | struct netlink_ext_ack *extack);
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| 19 | };
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| 20 |
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| 21 | static inline int dsa_conduit_hwtstamp_validate(struct net_device *dev,
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| 22 | const struct kernel_hwtstamp_config *config,
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| 23 | struct netlink_ext_ack *extack)
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| 24 | {
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| 25 | if (!netdev_uses_dsa(dev))
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| 26 | return 0;
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| 27 |
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| 28 | |
| 29 | * netdev_uses_dsa() returns true, the dsa_core module is still
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| 30 | * registered, and so, dsa_unregister_stubs() couldn't have run.
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| 31 | * For netdev_uses_dsa() to start returning false, it would imply that
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| 32 | * dsa_conduit_teardown() has executed, which requires rtnl_lock().
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| 33 |
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| 34 | ASSERT_RTNL();
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| 35 |
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| 36 | return dsa_stubs->conduit_hwtstamp_validate(dev, config, extack);
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| 37 | }
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| 38 |
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| 39 | #else
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| 40 |
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| 41 | static inline int dsa_conduit_hwtstamp_validate(struct net_device *dev,
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| 42 | const struct kernel_hwtstamp_config *config,
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| 43 | struct netlink_ext_ack *extack)
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| 44 | {
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| 45 | return 0;
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| 46 | }
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| 47 |
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| 48 | #endif
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