nfsd: tabulate nfs4 xdr encoding functions
In preparation for minorversion 1
All encoders now return an nfserr status (typically their
nfserr argument). Unsupported ops go through nfsd4_encode_operation
too, so use nfsd4_encode_noop to encode nothing for their reply body.
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index a40bec5..9b6a9ba 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1950,7 +1950,7 @@
return -EINVAL;
}
-static void
+static __be32
nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
{
ENCODE_HEAD;
@@ -1961,9 +1961,10 @@
WRITE32(access->ac_resp_access);
ADJUST_ARGS();
}
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
{
ENCODE_SEQID_OP_HEAD;
@@ -1975,10 +1976,11 @@
ADJUST_ARGS();
}
ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
{
ENCODE_HEAD;
@@ -1988,9 +1990,10 @@
WRITEMEM(commit->co_verf.data, 8);
ADJUST_ARGS();
}
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
{
ENCODE_HEAD;
@@ -2003,6 +2006,7 @@
WRITE32(create->cr_bmval[1]);
ADJUST_ARGS();
}
+ return nfserr;
}
static __be32
@@ -2023,9 +2027,10 @@
return nfserr;
}
-static void
-nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
+static __be32
+nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
{
+ struct svc_fh *fhp = *fhpp;
unsigned int len;
ENCODE_HEAD;
@@ -2036,6 +2041,7 @@
WRITEMEM(&fhp->fh_handle.fh_base, len);
ADJUST_ARGS();
}
+ return nfserr;
}
/*
@@ -2063,7 +2069,7 @@
ADJUST_ARGS();
}
-static void
+static __be32
nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
{
ENCODE_SEQID_OP_HEAD;
@@ -2077,16 +2083,18 @@
nfsd4_encode_lock_denied(resp, &lock->lk_denied);
ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
{
if (nfserr == nfserr_denied)
nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
{
ENCODE_SEQID_OP_HEAD;
@@ -2099,10 +2107,11 @@
}
ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
{
ENCODE_HEAD;
@@ -2112,10 +2121,11 @@
WRITECINFO(link->li_cinfo);
ADJUST_ARGS();
}
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
{
ENCODE_SEQID_OP_HEAD;
@@ -2178,9 +2188,10 @@
/* XXX save filehandle here */
out:
ENCODE_SEQID_OP_TAIL(open->op_stateowner);
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
{
ENCODE_SEQID_OP_HEAD;
@@ -2193,9 +2204,10 @@
}
ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
{
ENCODE_SEQID_OP_HEAD;
@@ -2208,6 +2220,7 @@
}
ENCODE_SEQID_OP_TAIL(od->od_stateowner);
+ return nfserr;
}
static __be32
@@ -2402,7 +2415,7 @@
return nfserr;
}
-static void
+static __be32
nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
{
ENCODE_HEAD;
@@ -2412,9 +2425,10 @@
WRITECINFO(remove->rm_cinfo);
ADJUST_ARGS();
}
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
{
ENCODE_HEAD;
@@ -2425,9 +2439,10 @@
WRITECINFO(rename->rn_tinfo);
ADJUST_ARGS();
}
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
struct nfsd4_secinfo *secinfo)
{
@@ -2491,13 +2506,14 @@
out:
if (exp)
exp_put(exp);
+ return nfserr;
}
/*
* The SETATTR encode routine is special -- it always encodes a bitmap,
* regardless of the error status.
*/
-static void
+static __be32
nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
{
ENCODE_HEAD;
@@ -2514,9 +2530,10 @@
WRITE32(setattr->sa_bmval[1]);
}
ADJUST_ARGS();
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
{
ENCODE_HEAD;
@@ -2533,9 +2550,10 @@
WRITE32(0);
ADJUST_ARGS();
}
+ return nfserr;
}
-static void
+static __be32
nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
{
ENCODE_HEAD;
@@ -2547,8 +2565,56 @@
WRITEMEM(write->wr_verifier.data, 8);
ADJUST_ARGS();
}
+ return nfserr;
}
+static __be32
+nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
+{
+ return nfserr;
+}
+
+typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
+
+static nfsd4_enc nfsd4_enc_ops[] = {
+ [OP_ACCESS] (nfsd4_enc)nfsd4_encode_access,
+ [OP_CLOSE] (nfsd4_enc)nfsd4_encode_close,
+ [OP_COMMIT] (nfsd4_enc)nfsd4_encode_commit,
+ [OP_CREATE] (nfsd4_enc)nfsd4_encode_create,
+ [OP_DELEGPURGE] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_DELEGRETURN] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_GETATTR] (nfsd4_enc)nfsd4_encode_getattr,
+ [OP_GETFH] (nfsd4_enc)nfsd4_encode_getfh,
+ [OP_LINK] (nfsd4_enc)nfsd4_encode_link,
+ [OP_LOCK] (nfsd4_enc)nfsd4_encode_lock,
+ [OP_LOCKT] (nfsd4_enc)nfsd4_encode_lockt,
+ [OP_LOCKU] (nfsd4_enc)nfsd4_encode_locku,
+ [OP_LOOKUP] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_LOOKUPP] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_NVERIFY] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_OPEN] (nfsd4_enc)nfsd4_encode_open,
+ [OP_OPEN_CONFIRM] (nfsd4_enc)nfsd4_encode_open_confirm,
+ [OP_OPEN_DOWNGRADE] (nfsd4_enc)nfsd4_encode_open_downgrade,
+ [OP_PUTFH] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_PUTPUBFH] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_PUTROOTFH] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_READ] (nfsd4_enc)nfsd4_encode_read,
+ [OP_READDIR] (nfsd4_enc)nfsd4_encode_readdir,
+ [OP_READLINK] (nfsd4_enc)nfsd4_encode_readlink,
+ [OP_REMOVE] (nfsd4_enc)nfsd4_encode_remove,
+ [OP_RENAME] (nfsd4_enc)nfsd4_encode_rename,
+ [OP_RENEW] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_RESTOREFH] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_SAVEFH] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_SECINFO] (nfsd4_enc)nfsd4_encode_secinfo,
+ [OP_SETATTR] (nfsd4_enc)nfsd4_encode_setattr,
+ [OP_SETCLIENTID] (nfsd4_enc)nfsd4_encode_setclientid,
+ [OP_SETCLIENTID_CONFIRM](nfsd4_enc)nfsd4_encode_noop,
+ [OP_VERIFY] (nfsd4_enc)nfsd4_encode_noop,
+ [OP_WRITE] (nfsd4_enc)nfsd4_encode_write,
+ [OP_RELEASE_LOCKOWNER] (nfsd4_enc)nfsd4_encode_noop,
+};
+
void
nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
{
@@ -2560,101 +2626,12 @@
statp = p++; /* to be backfilled at the end */
ADJUST_ARGS();
- switch (op->opnum) {
- case OP_ACCESS:
- nfsd4_encode_access(resp, op->status, &op->u.access);
- break;
- case OP_CLOSE:
- nfsd4_encode_close(resp, op->status, &op->u.close);
- break;
- case OP_COMMIT:
- nfsd4_encode_commit(resp, op->status, &op->u.commit);
- break;
- case OP_CREATE:
- nfsd4_encode_create(resp, op->status, &op->u.create);
- break;
- case OP_DELEGRETURN:
- break;
- case OP_GETATTR:
- op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
- break;
- case OP_GETFH:
- nfsd4_encode_getfh(resp, op->status, op->u.getfh);
- break;
- case OP_LINK:
- nfsd4_encode_link(resp, op->status, &op->u.link);
- break;
- case OP_LOCK:
- nfsd4_encode_lock(resp, op->status, &op->u.lock);
- break;
- case OP_LOCKT:
- nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
- break;
- case OP_LOCKU:
- nfsd4_encode_locku(resp, op->status, &op->u.locku);
- break;
- case OP_LOOKUP:
- break;
- case OP_LOOKUPP:
- break;
- case OP_NVERIFY:
- break;
- case OP_OPEN:
- nfsd4_encode_open(resp, op->status, &op->u.open);
- break;
- case OP_OPEN_CONFIRM:
- nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
- break;
- case OP_OPEN_DOWNGRADE:
- nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
- break;
- case OP_PUTFH:
- break;
- case OP_PUTROOTFH:
- break;
- case OP_READ:
- op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
- break;
- case OP_READDIR:
- op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
- break;
- case OP_READLINK:
- op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
- break;
- case OP_REMOVE:
- nfsd4_encode_remove(resp, op->status, &op->u.remove);
- break;
- case OP_RENAME:
- nfsd4_encode_rename(resp, op->status, &op->u.rename);
- break;
- case OP_RENEW:
- break;
- case OP_RESTOREFH:
- break;
- case OP_SAVEFH:
- break;
- case OP_SECINFO:
- nfsd4_encode_secinfo(resp, op->status, &op->u.secinfo);
- break;
- case OP_SETATTR:
- nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
- break;
- case OP_SETCLIENTID:
- nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
- break;
- case OP_SETCLIENTID_CONFIRM:
- break;
- case OP_VERIFY:
- break;
- case OP_WRITE:
- nfsd4_encode_write(resp, op->status, &op->u.write);
- break;
- case OP_RELEASE_LOCKOWNER:
- break;
- default:
- break;
- }
-
+ if (op->opnum == OP_ILLEGAL)
+ goto status;
+ BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
+ !nfsd4_enc_ops[op->opnum]);
+ op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
+status:
/*
* Note: We write the status directly, instead of using WRITE32(),
* since it is already in network byte order.