[PATCH] knfsd: nfsd4: reorganize compound ops

Define an op descriptor struct, use it to simplify nfsd4_proc_compound().

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

4 files changed, 144 insertions, 130 deletions

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 8fc2cab9d76a..e1c463bad124 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -258,7 +258,8 @@ out:
  * filehandle-manipulating ops.
  */
 static __be32
-nfsd4_getfh(struct nfsd4_compound_state *cstate, struct svc_fh **getfh)
+nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+            struct svc_fh **getfh)
 {
         if (!cstate->current_fh.fh_dentry)
                 return nfserr_nofilehandle;
@@ -279,7 +280,8 @@ nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 }
 
 static __be32
-nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate)
+nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+                void *arg)
 {
         __be32 status;
 
@@ -290,7 +292,8 @@ nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate)
 }
 
 static __be32
-nfsd4_restorefh(struct nfsd4_compound_state *cstate)
+nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+                void *arg)
 {
         if (!cstate->save_fh.fh_dentry)
                 return nfserr_restorefh;
@@ -300,7 +303,8 @@ nfsd4_restorefh(struct nfsd4_compound_state *cstate)
 }
 
 static __be32
-nfsd4_savefh(struct nfsd4_compound_state *cstate)
+nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+             void *arg)
 {
         if (!cstate->current_fh.fh_dentry)
                 return nfserr_nofilehandle;
@@ -463,7 +467,8 @@ nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 }
 
 static __be32
-nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate)
+nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+              void *arg)
 {
         struct svc_fh tmp_fh;
         __be32 ret;
@@ -791,6 +796,16 @@ static struct nfsd4_compound_state *cstate_alloc(void)
         return cstate;
 }
 
+typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
+                              void *);
+
+struct nfsd4_operation {
+        nfsd4op_func op_func;
+        u32 op_flags;
+};
+
+static struct nfsd4_operation nfsd4_ops[];
+
 /*
  * COMPOUND call.
  */
@@ -800,6 +815,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
                     struct nfsd4_compoundres *resp)
 {
         struct nfsd4_op *op;
+        struct nfsd4_operation *opdesc;
         struct nfsd4_compound_state *cstate = NULL;
         int             slack_bytes;
         __be32          status;
@@ -854,6 +870,8 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
                         goto encode_op;
                 }
 
+                opdesc = &nfsd4_ops[op->opnum];
+
                 /* All operations except RENEW, SETCLIENTID, RESTOREFH
                 * SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
                 * require a valid current filehandle
@@ -883,127 +901,11 @@ nfsd4_proc_compound(struct svc_rqst *rqstp,
                         op->status = nfserr_moved;
                         goto encode_op;
                 }
-                switch (op->opnum) {
-                case OP_ACCESS:
-                        op->status = nfsd4_access(rqstp, cstate,
-                                                  &op->u.access);
-                        break;
-                case OP_CLOSE:
-                        op->status = nfsd4_close(rqstp, cstate,
-                                                 &op->u.close);
-                        break;
-                case OP_COMMIT:
-                        op->status = nfsd4_commit(rqstp, cstate,
-                                                  &op->u.commit);
-                        break;
-                case OP_CREATE:
-                        op->status = nfsd4_create(rqstp, cstate,
-                                                  &op->u.create);
-                        break;
-                case OP_DELEGRETURN:
-                        op->status = nfsd4_delegreturn(rqstp, cstate,
-                                                       &op->u.delegreturn);
-                        break;
-                case OP_GETATTR:
-                        op->status = nfsd4_getattr(rqstp, cstate,
-                                                   &op->u.getattr);
-                        break;
-                case OP_GETFH:
-                        op->status = nfsd4_getfh(cstate, &op->u.getfh);
-                        break;
-                case OP_LINK:
-                        op->status = nfsd4_link(rqstp, cstate, &op->u.link);
-                        break;
-                case OP_LOCK:
-                        op->status = nfsd4_lock(rqstp, cstate, &op->u.lock);
-                        break;
-                case OP_LOCKT:
-                        op->status = nfsd4_lockt(rqstp, cstate, &op->u.lockt);
-                        break;
-                case OP_LOCKU:
-                        op->status = nfsd4_locku(rqstp, cstate, &op->u.locku);
-                        break;
-                case OP_LOOKUP:
-                        op->status = nfsd4_lookup(rqstp, cstate,
-                                                  &op->u.lookup);
-                        break;
-                case OP_LOOKUPP:
-                        op->status = nfsd4_lookupp(rqstp, cstate);
-                        break;
-                case OP_NVERIFY:
-                        op->status = nfsd4_nverify(rqstp, cstate,
-                                                  &op->u.nverify);
-                        break;
-                case OP_OPEN:
-                        op->status = nfsd4_open(rqstp, cstate,
-                                                &op->u.open);
-                        break;
-                case OP_OPEN_CONFIRM:
-                        op->status = nfsd4_open_confirm(rqstp, cstate,
-                                                        &op->u.open_confirm);
-                        break;
-                case OP_OPEN_DOWNGRADE:
-                        op->status = nfsd4_open_downgrade(rqstp, cstate,
-                                                        &op->u.open_downgrade);
-                        break;
-                case OP_PUTFH:
-                        op->status = nfsd4_putfh(rqstp, cstate, &op->u.putfh);
-                        break;
-                case OP_PUTROOTFH:
-                        op->status = nfsd4_putrootfh(rqstp, cstate);
-                        break;
-                case OP_READ:
-                        op->status = nfsd4_read(rqstp, cstate, &op->u.read);
-                        break;
-                case OP_READDIR:
-                        op->status = nfsd4_readdir(rqstp, cstate,
-                                                   &op->u.readdir);
-                        break;
-                case OP_READLINK:
-                        op->status = nfsd4_readlink(rqstp, cstate,
-                                                    &op->u.readlink);
-                        break;
-                case OP_REMOVE:
-                        op->status = nfsd4_remove(rqstp, cstate,
-                                                  &op->u.remove);
-                        break;
-                case OP_RENAME:
-                        op->status = nfsd4_rename(rqstp, cstate,
-                                                  &op->u.rename);
-                        break;
-                case OP_RENEW:
-                        op->status = nfsd4_renew(&op->u.renew);
-                        break;
-                case OP_RESTOREFH:
-                        op->status = nfsd4_restorefh(cstate);
-                        break;
-                case OP_SAVEFH:
-                        op->status = nfsd4_savefh(cstate);
-                        break;
-                case OP_SETATTR:
-                        op->status = nfsd4_setattr(rqstp, cstate,
-                                                   &op->u.setattr);
-                        break;
-                case OP_SETCLIENTID:
-                        op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
-                        break;
-                case OP_SETCLIENTID_CONFIRM:
-                        op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
-                        break;
-                case OP_VERIFY:
-                        op->status = nfsd4_verify(rqstp, cstate,
-                                                  &op->u.verify);
-                        break;
-                case OP_WRITE:
-                        op->status = nfsd4_write(rqstp, cstate, &op->u.write);
-                        break;
-                case OP_RELEASE_LOCKOWNER:
-                        op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
-                        break;
-                default:
+
+                if (opdesc->op_func)
+                        op->status = opdesc->op_func(rqstp, cstate, &op->u);
+                else
                         BUG_ON(op->status == nfs_ok);
-                        break;
-                }
 
 encode_op:
                 if (op->status == nfserr_replay_me) {
@@ -1031,6 +933,108 @@ out:
         return status;
 }
 
+static struct nfsd4_operation nfsd4_ops[OP_RELEASE_LOCKOWNER+1] = {
+        [OP_ACCESS] = {
+                .op_func = (nfsd4op_func)nfsd4_access,
+        },
+        [OP_CLOSE] = {
+                .op_func = (nfsd4op_func)nfsd4_close,
+        },
+        [OP_COMMIT] = {
+                .op_func = (nfsd4op_func)nfsd4_commit,
+        },
+        [OP_CREATE] = {
+                .op_func = (nfsd4op_func)nfsd4_create,
+        },
+        [OP_DELEGRETURN] = {
+                .op_func = (nfsd4op_func)nfsd4_delegreturn,
+        },
+        [OP_GETATTR] = {
+                .op_func = (nfsd4op_func)nfsd4_getattr,
+        },
+        [OP_GETFH] = {
+                .op_func = (nfsd4op_func)nfsd4_getfh,
+        },
+        [OP_LINK] = {
+                .op_func = (nfsd4op_func)nfsd4_link,
+        },
+        [OP_LOCK] = {
+                .op_func = (nfsd4op_func)nfsd4_lock,
+        },
+        [OP_LOCKT] = {
+                .op_func = (nfsd4op_func)nfsd4_lockt,
+        },
+        [OP_LOCKU] = {
+                .op_func = (nfsd4op_func)nfsd4_locku,
+        },
+        [OP_LOOKUP] = {
+                .op_func = (nfsd4op_func)nfsd4_lookup,
+        },
+        [OP_LOOKUPP] = {
+                .op_func = (nfsd4op_func)nfsd4_lookupp,
+        },
+        [OP_NVERIFY] = {
+                .op_func = (nfsd4op_func)nfsd4_nverify,
+        },
+        [OP_OPEN] = {
+                .op_func = (nfsd4op_func)nfsd4_open,
+        },
+        [OP_OPEN_CONFIRM] = {
+                .op_func = (nfsd4op_func)nfsd4_open_confirm,
+        },
+        [OP_OPEN_DOWNGRADE] = {
+                .op_func = (nfsd4op_func)nfsd4_open_downgrade,
+        },
+        [OP_PUTFH] = {
+                .op_func = (nfsd4op_func)nfsd4_putfh,
+        },
+        [OP_PUTROOTFH] = {
+                .op_func = (nfsd4op_func)nfsd4_putrootfh,
+        },
+        [OP_READ] = {
+                .op_func = (nfsd4op_func)nfsd4_read,
+        },
+        [OP_READDIR] = {
+                .op_func = (nfsd4op_func)nfsd4_readdir,
+        },
+        [OP_READLINK] = {
+                .op_func = (nfsd4op_func)nfsd4_readlink,
+        },
+        [OP_REMOVE] = {
+                .op_func = (nfsd4op_func)nfsd4_remove,
+        },
+        [OP_RENAME] = {
+                .op_func = (nfsd4op_func)nfsd4_rename,
+        },
+        [OP_RENEW] = {
+                .op_func = (nfsd4op_func)nfsd4_renew,
+        },
+        [OP_RESTOREFH] = {
+                .op_func = (nfsd4op_func)nfsd4_restorefh,
+        },
+        [OP_SAVEFH] = {
+                .op_func = (nfsd4op_func)nfsd4_savefh,
+        },
+        [OP_SETATTR] = {
+                .op_func = (nfsd4op_func)nfsd4_setattr,
+        },
+        [OP_SETCLIENTID] = {
+                .op_func = (nfsd4op_func)nfsd4_setclientid,
+        },
+        [OP_SETCLIENTID_CONFIRM] = {
+                .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
+        },
+        [OP_VERIFY] = {
+                .op_func = (nfsd4op_func)nfsd4_verify,
+        },
+        [OP_WRITE] = {
+                .op_func = (nfsd4op_func)nfsd4_write,
+        },
+        [OP_RELEASE_LOCKOWNER] = {
+                .op_func = (nfsd4op_func)nfsd4_release_lockowner,
+        },
+};
+
 #define nfs4svc_decode_voidargs         NULL
 #define nfs4svc_release_void            NULL
 #define nfsd4_voidres                   nfsd4_voidargs
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index db701c47a342..9de89df961f4 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -711,7 +711,8 @@ out_err:
  *
  */
 __be32
-nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid)
+nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+                  struct nfsd4_setclientid *setclid)
 {
         __be32                  ip_addr = rqstp->rq_addr.sin_addr.s_addr;
         struct xdr_netobj       clname = { 
@@ -876,7 +877,9 @@ out:
  * NOTE: callback information will be processed here in a future patch
  */
 __be32
-nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm)
+nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
+                         struct nfsd4_compound_state *cstate,
+                         struct nfsd4_setclientid_confirm *setclientid_confirm)
 {
         __be32 ip_addr = rqstp->rq_addr.sin_addr.s_addr;
         struct nfs4_client *conf, *unconf;
@@ -1833,7 +1836,8 @@ static void laundromat_main(struct work_struct *);
 static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main);
 
 __be32
-nfsd4_renew(clientid_t *clid)
+nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
+            clientid_t *clid)
 {
         struct nfs4_client *clp;
         __be32 status;
@@ -2979,7 +2983,9 @@ out:
 }
 
 __be32
-nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner)
+nfsd4_release_lockowner(struct svc_rqst *rqstp,
+                        struct nfsd4_compound_state *cstate,
+                        struct nfsd4_release_lockowner *rlockowner)
 {
         clientid_t *clid = &rlockowner->rl_clientid;
         struct nfs4_stateowner *sop;
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h
index c3673f487e84..ab5c236bd9a7 100644
--- a/include/linux/nfsd/state.h
+++ b/include/linux/nfsd/state.h
@@ -273,7 +273,6 @@ struct nfs4_stateid {
         ((err) != nfserr_stale_stateid) &&      \
         ((err) != nfserr_bad_stateid))
 
-extern __be32 nfsd4_renew(clientid_t *clid);
 extern __be32 nfs4_preprocess_stateid_op(struct svc_fh *current_fh,
                 stateid_t *stateid, int flags, struct file **filp);
 extern void nfs4_lock_state(void);
diff --git a/include/linux/nfsd/xdr4.h b/include/linux/nfsd/xdr4.h
index 4e5cd05ea373..09799bcee0ac 100644
--- a/include/linux/nfsd/xdr4.h
+++ b/include/linux/nfsd/xdr4.h
@@ -436,8 +436,10 @@ __be32 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
                        struct dentry *dentry, __be32 *buffer, int *countp,
                        u32 *bmval, struct svc_rqst *);
 extern __be32 nfsd4_setclientid(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
                 struct nfsd4_setclientid *setclid);
 extern __be32 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
                 struct nfsd4_setclientid_confirm *setclientid_confirm);
 extern __be32 nfsd4_process_open1(struct nfsd4_open *open);
 extern __be32 nfsd4_process_open2(struct svc_rqst *rqstp,
@@ -460,10 +462,13 @@ extern __be32 nfsd4_locku(struct svc_rqst *rqstp,
                 struct nfsd4_locku *locku);
 extern __be32
 nfsd4_release_lockowner(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *,
                 struct nfsd4_release_lockowner *rlockowner);
 extern void nfsd4_release_compoundargs(struct nfsd4_compoundargs *);
 extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp,
                 struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr);
+extern __be32 nfsd4_renew(struct svc_rqst *rqstp,
+                          struct nfsd4_compound_state *, clientid_t *clid);
 #endif
 
 /*