diff options
Diffstat (limited to 'fs/xfs/xfs_hooks.c')
| -rw-r--r-- | fs/xfs/xfs_hooks.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/fs/xfs/xfs_hooks.c b/fs/xfs/xfs_hooks.c index 3f958ece0dc0..653fc1f82516 100644 --- a/fs/xfs/xfs_hooks.c +++ b/fs/xfs/xfs_hooks.c @@ -12,6 +12,7 @@ #include "xfs_ag.h" #include "xfs_trace.h" +#if defined(CONFIG_XFS_LIVE_HOOKS_SRCU) /* Initialize a notifier chain. */ void xfs_hooks_init( @@ -51,3 +52,43 @@ xfs_hooks_call( { return srcu_notifier_call_chain(&chain->head, val, priv); } +#elif defined(CONFIG_XFS_LIVE_HOOKS_BLOCKING) +/* Initialize a notifier chain. */ +void +xfs_hooks_init( + struct xfs_hooks *chain) +{ + BLOCKING_INIT_NOTIFIER_HEAD(&chain->head); +} + +/* Make it so a function gets called whenever we hit a certain hook point. */ +int +xfs_hooks_add( + struct xfs_hooks *chain, + struct xfs_hook *hook) +{ + ASSERT(hook->nb.notifier_call != NULL); + BUILD_BUG_ON(offsetof(struct xfs_hook, nb) != 0); + + return blocking_notifier_chain_register(&chain->head, &hook->nb); +} + +/* Remove a previously installed hook. */ +void +xfs_hooks_del( + struct xfs_hooks *chain, + struct xfs_hook *hook) +{ + blocking_notifier_chain_unregister(&chain->head, &hook->nb); +} + +/* Call a hook. Returns the NOTIFY_* value returned by the last hook. */ +int +xfs_hooks_call( + struct xfs_hooks *chain, + unsigned long val, + void *priv) +{ + return blocking_notifier_call_chain(&chain->head, val, priv); +} +#endif /* CONFIG_XFS_LIVE_HOOKS_BLOCKING */ |