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| author | Benjamin Coddington <bcodding@redhat.com> | 2017-04-11 19:50:11 +0300 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2017-04-21 17:45:01 +0300 |
| commit | b1ece737f44f91dca8f4829cf0b442e752e406db (patch) | |
| tree | d0368ec8da45be194c4cde25d46e178ea9060715 /include/linux/lockd/lockd.h | |
| parent | 7d6ddf88c4db372689c8aa65ea652d0514d66c06 (diff) | |
| download | linux-b1ece737f44f91dca8f4829cf0b442e752e406db.tar.xz | |
lockd: Introduce nlmclnt_operations
NFS would enjoy the ability to modify the behavior of the NLM client's
unlock RPC task in order to delay the transmission of the unlock until IO
that was submitted under that lock has completed. This ability can ensure
that the NLM client will always complete the transmission of an unlock even
if the waiting caller has been interrupted with fatal signal.
For this purpose, a pointer to a struct nlmclnt_operations can be assigned
in a nfs_module's nfs_rpc_ops that will install those nlmclnt_operations on
the nlm_host. The struct nlmclnt_operations defines three callback
operations that will be used in a following patch:
nlmclnt_alloc_call - used to call back after a successful allocation of
a struct nlm_rqst in nlmclnt_proc().
nlmclnt_unlock_prepare - used to call back during NLM unlock's
rpc_call_prepare. The NLM client defers calling rpc_call_start()
until this callback returns false.
nlmclnt_release_call - used to call back when the NLM client's struct
nlm_rqst is freed.
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'include/linux/lockd/lockd.h')
| -rw-r--r-- | include/linux/lockd/lockd.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h index b37dee3acaba..41f7b6a04d69 100644 --- a/include/linux/lockd/lockd.h +++ b/include/linux/lockd/lockd.h @@ -69,6 +69,7 @@ struct nlm_host { char *h_addrbuf; /* address eyecatcher */ struct net *net; /* host net */ char nodename[UNX_MAXNODENAME + 1]; + const struct nlmclnt_operations *h_nlmclnt_ops; /* Callback ops for NLM users */ }; /* @@ -142,6 +143,7 @@ struct nlm_rqst { struct nlm_block * a_block; unsigned int a_retries; /* Retry count */ u8 a_owner[NLMCLNT_OHSIZE]; + void * a_callback_data; /* sent to nlmclnt_operations callbacks */ }; /* |