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| author | J. Bruce Fields <bfields@citi.umich.edu> | 2010-06-05 02:04:45 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2010-10-02 01:29:44 +0200 |
| commit | 6ff8da088766d70f0441feb982b82978a6cbf7ef (patch) | |
| tree | 7d0e90e4e03323fec67a972cdff60c9b8a96925a /fs/nfsd/state.h | |
| parent | nfsd4: remove separate cb_args struct (diff) | |
| download | linux-6ff8da088766d70f0441feb982b82978a6cbf7ef.tar.xz linux-6ff8da088766d70f0441feb982b82978a6cbf7ef.zip | |
nfsd4: Move callback setup to callback queue
Instead of creating the new rpc client from a regular server thread,
set a flag, kick off a null call, and allow the null call to do the work
of setting up the client on the callback workqueue.
Use a spinlock to ensure the callback work gets a consistent view of the
callback parameters.
This allows, for example, changing the callback from contexts where
sleeping is not allowed. I hope it will also keep the locking simple as
we add more session and trunking features, by serializing most of the
callback-specific work.
This also closes a small race where the the new cb_ident could be used
with an old connection (or vice-versa).
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Diffstat (limited to 'fs/nfsd/state.h')
| -rw-r--r-- | fs/nfsd/state.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 2ece6bee65f7..58bc2a63ca14 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -84,7 +84,6 @@ struct nfs4_delegation { u32 dl_type; time_t dl_time; /* For recall: */ - u32 dl_ident; stateid_t dl_stateid; struct knfsd_fh dl_fh; int dl_retries; @@ -217,10 +216,17 @@ struct nfs4_client { /* for v4.0 and v4.1 callbacks: */ struct nfs4_cb_conn cl_cb_conn; +#define NFSD4_CLIENT_CB_UPDATE 1 +#define NFSD4_CLIENT_KILL 2 + unsigned long cl_cb_flags; struct rpc_clnt *cl_cb_client; + u32 cl_cb_ident; atomic_t cl_cb_set; struct nfsd4_callback cl_cb_null; + /* for all client information that callback code might need: */ + spinlock_t cl_lock; + /* for nfs41 */ struct list_head cl_sessions; struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ @@ -439,7 +445,7 @@ extern void nfsd4_do_callback_rpc(struct work_struct *); extern void nfsd4_cb_recall(struct nfs4_delegation *dp); extern int nfsd4_create_callback_queue(void); extern void nfsd4_destroy_callback_queue(void); -extern void nfsd4_set_callback_client(struct nfs4_client *, struct rpc_clnt *); +extern void nfsd4_shutdown_callback(struct nfs4_client *); extern void nfs4_put_delegation(struct nfs4_delegation *dp); extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname); extern void nfsd4_init_recdir(char *recdir_name); |