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e571cbf1a4
The NFSv4 and NFSv4.1 protocols both allow for the redirection of a client from one server to another in order to support filesystem migration and replication. For full protocol support, we need to add the ability to convert a DNS host name into an IP address that we can feed to the RPC client. We'll reuse the sunrpc cache, now that it has been converted to work with rpc_pipefs. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
28 lines
790 B
C
28 lines
790 B
C
/*
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* Helper routines for the NFS client caches
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*
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* Copyright (c) 2009 Trond Myklebust <Trond.Myklebust@netapp.com>
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*/
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#include <linux/completion.h>
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#include <linux/sunrpc/cache.h>
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#include <asm/atomic.h>
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/*
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* Deferred request handling
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*/
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struct nfs_cache_defer_req {
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struct cache_req req;
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struct cache_deferred_req deferred_req;
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struct completion completion;
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atomic_t count;
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};
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extern int nfs_cache_upcall(struct cache_detail *cd, char *entry_name);
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extern struct nfs_cache_defer_req *nfs_cache_defer_req_alloc(void);
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extern void nfs_cache_defer_req_put(struct nfs_cache_defer_req *dreq);
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extern int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq);
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extern int nfs_cache_register(struct cache_detail *cd);
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extern void nfs_cache_unregister(struct cache_detail *cd);
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