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| author | Leon Romanovsky <leonro@nvidia.com> | 2021-10-12 16:15:24 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-10-12 16:29:17 -0700 |
| commit | bd032e35c568ff7cfa347aa4ddd6491e2453f00c (patch) | |
| tree | b9a808354fc8d0554fb51a658c3e6adaac07ecb6 /net/core | |
| parent | b88f7b1203bf481af58291c28957aaab09503f43 (diff) | |
| download | lwn-bd032e35c568ff7cfa347aa4ddd6491e2453f00c.tar.gz lwn-bd032e35c568ff7cfa347aa4ddd6491e2453f00c.zip | |
devlink: Allow control devlink ops behavior through feature mask
Introduce new devlink call to set feature mask to control devlink
behavior during device initialization phase after devlink_alloc()
is already called.
This allows us to set reload ops based on device property which
is not known at the beginning of driver initialization.
For the sake of simplicity, this API lacks any type of locking and
needs to be called before devlink_register() to make sure that no
parallel access to the ops is possible at this stage.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/devlink.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/net/core/devlink.c b/net/core/devlink.c index 276e1e421eb4..1931caa0ce1e 100644 --- a/net/core/devlink.c +++ b/net/core/devlink.c @@ -54,6 +54,7 @@ struct devlink { struct list_head trap_group_list; struct list_head trap_policer_list; const struct devlink_ops *ops; + u64 features; struct xarray snapshot_ids; struct devlink_dev_stats stats; struct device *dev; @@ -4032,7 +4033,7 @@ static int devlink_reload(struct devlink *devlink, struct net *dest_net, struct net *curr_net; int err; - if (!devlink->reload_enabled) + if (!devlink->reload_enabled || !(devlink->features & DEVLINK_F_RELOAD)) return -EOPNOTSUPP; memcpy(remote_reload_stats, devlink->stats.remote_reload_stats, @@ -8986,6 +8987,25 @@ static bool devlink_reload_actions_valid(const struct devlink_ops *ops) } /** + * devlink_set_features - Set devlink supported features + * + * @devlink: devlink + * @features: devlink support features + * + * This interface allows us to set reload ops separatelly from + * the devlink_alloc. + */ +void devlink_set_features(struct devlink *devlink, u64 features) +{ + ASSERT_DEVLINK_NOT_REGISTERED(devlink); + + WARN_ON(features & DEVLINK_F_RELOAD && + !devlink_reload_supported(devlink->ops)); + devlink->features = features; +} +EXPORT_SYMBOL_GPL(devlink_set_features); + +/** * devlink_alloc_ns - Allocate new devlink instance resources * in specific namespace * @@ -9155,7 +9175,7 @@ void devlink_unregister(struct devlink *devlink) wait_for_completion(&devlink->comp); mutex_lock(&devlink_mutex); - WARN_ON(devlink_reload_supported(devlink->ops) && + WARN_ON(devlink->features & DEVLINK_F_RELOAD && devlink->reload_enabled); devlink_notify_unregister(devlink); xa_clear_mark(&devlinks, devlink->index, DEVLINK_REGISTERED); |