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SUNRPC: send notification events on pipefs sb creation and destruction

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They will be used to notify subscribers about pipefs superblock creation and
destruction.
Subcribers will have to create their dentries on passed superblock on mount
event and destroy otherwise.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Stanislav Kinsbursky 2011-12-26 15:39:13 +03:00 • committed by Trond Myklebust
parent 021c68dec8
commit 2d00131acc
2 changed files with 40 additions and 0 deletions
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8
include/linux/sunrpc/rpc_pipe_fs.h
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@ -43,6 +43,14 @@ RPC_I(struct inode *inode)
return container_of(inode, struct rpc_inode, vfs_inode);
}
extern int rpc_pipefs_notifier_register(struct notifier_block *);
extern void rpc_pipefs_notifier_unregister(struct notifier_block *);
enum {
RPC_PIPEFS_MOUNT,
RPC_PIPEFS_UMOUNT,
};
extern ssize_t rpc_pipe_generic_upcall(struct file *, struct rpc_pipe_msg *,
char __user *, size_t);
extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);