projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 5a178186 VO |
1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 2 | /* | |
| 3 | * include/net/dsa_stubs.h - Stubs for the Distributed Switch Architecture framework | |
| 4 | */ | |
| 5 | ||
| 6 | #include <linux/mutex.h> | |
| 7 | #include <linux/netdevice.h> | |
| 8 | #include <linux/net_tstamp.h> | |
| 9 | #include <net/dsa.h> | |
| 10 | ||
| 11 | #if IS_ENABLED(CONFIG_NET_DSA) | |
| 12 | ||
| 13 | extern const struct dsa_stubs *dsa_stubs; | |
| 14 | ||
| 15 | struct dsa_stubs { | |
| 6ca80638 FF |
16 | int (*conduit_hwtstamp_validate)(struct net_device *dev, |
| 17 | const struct kernel_hwtstamp_config *config, | |
| 18 | struct netlink_ext_ack *extack); | |
| 5a178186 VO |
19 | }; |
| 20 | ||
| 6ca80638 FF |
21 | static inline int dsa_conduit_hwtstamp_validate(struct net_device *dev, |
| 22 | const struct kernel_hwtstamp_config *config, | |
| 23 | struct netlink_ext_ack *extack) | |
| 5a178186 VO |
24 | { |
| 25 | if (!netdev_uses_dsa(dev)) | |
| 26 | return 0; | |
| 27 | ||
| 28 | /* rtnl_lock() is a sufficient guarantee, because as long as | |
| 29 | * netdev_uses_dsa() returns true, the dsa_core module is still | |
| 30 | * registered, and so, dsa_unregister_stubs() couldn't have run. | |
| 31 | * For netdev_uses_dsa() to start returning false, it would imply that | |
| 6ca80638 | 32 | * dsa_conduit_teardown() has executed, which requires rtnl_lock(). |
| 5a178186 VO |
33 | */ |
| 34 | ASSERT_RTNL(); | |
| 35 | ||
| 6ca80638 | 36 | return dsa_stubs->conduit_hwtstamp_validate(dev, config, extack); |
| 5a178186 VO |
37 | } |
| 38 | ||
| 39 | #else | |
| 40 | ||
| 6ca80638 FF |
41 | static inline int dsa_conduit_hwtstamp_validate(struct net_device *dev, |
| 42 | const struct kernel_hwtstamp_config *config, | |
| 43 | struct netlink_ext_ack *extack) | |
| 5a178186 VO |
44 | { |
| 45 | return 0; | |
| 46 | } | |
| 47 | ||
| 48 | #endif |