NFS: use dynamically computed compound_hdr.replen for xdr_inline_pages offset
As Trond suggested, rather than passing a constant to xdr_inline_pages,
keep a running count of the expected reply bytes. In preparation for
nfs41, where additional op sequence are expteced when talking to nfs41
servers.
[NFS: cb_compoundhdr.replen is in words not bytes]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: get fs_locations replen before encoding the GETATTR]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: get getacl replen before encoding the GETATTR]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 746c6a5..6888946 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1721,20 +1721,13 @@
struct compound_hdr hdr = {
.nops = 0,
};
- struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
- unsigned int replen;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, req, &hdr);
encode_putfh(&xdr, args->fh, &hdr);
encode_readlink(&xdr, args, req, &hdr);
- /* set up reply kvec
- * toplevel_status + taglen + rescount + OP_PUTFH + status
- * + OP_READLINK + status + string length = 8
- */
- replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readlink_sz) << 2;
- xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
+ xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
args->pgbase, args->pglen);
encode_nops(&hdr);
return 0;
@@ -1749,23 +1742,16 @@
struct compound_hdr hdr = {
.nops = 0,
};
- struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
- int replen;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, req, &hdr);
encode_putfh(&xdr, args->fh, &hdr);
encode_readdir(&xdr, args, req, &hdr);
- /* set up reply kvec
- * toplevel_status + taglen + rescount + OP_PUTFH + status
- * + OP_READDIR + status + verifer(2) = 9
- */
- replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_readdir_sz) << 2;
- xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages,
+ xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
args->pgbase, args->count);
dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
- __func__, replen, args->pages,
+ __func__, hdr.replen << 2, args->pages,
args->pgbase, args->count);
encode_nops(&hdr);
return 0;
@@ -1776,24 +1762,17 @@
*/
static int nfs4_xdr_enc_read(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
{
- struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
struct xdr_stream xdr;
struct compound_hdr hdr = {
.nops = 0,
};
- int replen;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, req, &hdr);
encode_putfh(&xdr, args->fh, &hdr);
encode_read(&xdr, args, &hdr);
- /* set up reply kvec
- * toplevel status + taglen=0 + rescount + OP_PUTFH + status
- * + OP_READ + status + eof + datalen = 9
- */
- replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_read_sz) << 2;
- xdr_inline_pages(&req->rq_rcv_buf, replen,
+ xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
args->pages, args->pgbase, args->count);
req->rq_rcv_buf.flags |= XDRBUF_READ;
encode_nops(&hdr);
@@ -1827,20 +1806,18 @@
struct nfs_getaclargs *args)
{
struct xdr_stream xdr;
- struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
struct compound_hdr hdr = {
.nops = 0,
};
- int replen;
+ uint32_t replen;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, req, &hdr);
encode_putfh(&xdr, args->fh, &hdr);
+ replen = hdr.replen + nfs4_fattr_bitmap_maxsz + 1;
encode_getattr_two(&xdr, FATTR4_WORD0_ACL, 0, &hdr);
- /* set up reply buffer: */
- replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS4_dec_getacl_sz) << 2;
- xdr_inline_pages(&req->rq_rcv_buf, replen,
+ xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
args->acl_pages, args->acl_pgbase, args->acl_len);
encode_nops(&hdr);
return 0;
@@ -2045,21 +2022,16 @@
struct compound_hdr hdr = {
.nops = 0,
};
- struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
- int replen;
+ uint32_t replen;
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
encode_compound_hdr(&xdr, req, &hdr);
encode_putfh(&xdr, args->dir_fh, &hdr);
encode_lookup(&xdr, args->name, &hdr);
+ replen = hdr.replen; /* get the attribute into args->page */
encode_fs_locations(&xdr, args->bitmask, &hdr);
- /* set up reply
- * toplevel_status + OP_PUTFH + status
- * + OP_LOOKUP + status + OP_GETATTR + status = 7
- */
- replen = (RPC_REPHDRSIZE + auth->au_rslack + 7) << 2;
- xdr_inline_pages(&req->rq_rcv_buf, replen, &args->page,
+ xdr_inline_pages(&req->rq_rcv_buf, replen << 2, &args->page,
0, PAGE_SIZE);
encode_nops(&hdr);
return 0;