Re: [PATCH RFC v2 06/21] nfs: nfs4xdr: optimize RESERVE_SPACE in encode_create_session and encode_sequence

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Aug 14, 2009, at 10:19 AM, Benny Halevy wrote:
Coalesce multilpe constant RESERVE_SPACEs into one

Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
---
fs/nfs/nfs4xdr.c |   22 +++++-----------------
1 files changed, 5 insertions(+), 17 deletions(-)

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 17915c8..d460d81 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -1562,17 +1562,15 @@ static void encode_create_session(struct xdr_stream *xdr,
	uint32_t len;
	struct nfs_client *clp = args->client;

-	RESERVE_SPACE(4);
-	*p++ = cpu_to_be32(OP_CREATE_SESSION);
+	len = scnprintf(machine_name, sizeof(machine_name), "%s",
+			clp->cl_ipaddr);

-	RESERVE_SPACE(8);
+	RESERVE_SPACE(20 + 2*28 + 20 + len + 12);

It would be nicer if we could use the foo_maxsz macros or "n * sizeof(__be32)" here somehow instead of integers.

+	*p++ = cpu_to_be32(OP_CREATE_SESSION);
	p = xdr_encode_hyper(p, clp->cl_ex_clid);
-
-	RESERVE_SPACE(8);
	*p++ = cpu_to_be32(clp->cl_seqid);			/*Sequence id */
	*p++ = cpu_to_be32(args->flags);			/*flags */

-	RESERVE_SPACE(2*28);			/* 2 channel_attrs */
	/* Fore Channel */
*p++ = cpu_to_be32(args->fc_attrs.headerpadsz); /* header padding size */
	*p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz);	/* max req size */
@@ -1591,21 +1589,12 @@ static void encode_create_session(struct xdr_stream *xdr,
	*p++ = cpu_to_be32(args->bc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */

-	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
-
-	RESERVE_SPACE(4);			/* # of security flavors */
	*p++ = cpu_to_be32(1);
-
-	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */

	/* authsys_parms rfc1831 */
-	RESERVE_SPACE(4);
	*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);	/* stamp */
-	len = scnprintf(machine_name, sizeof(machine_name), "%s",
-			clp->cl_ipaddr);
-	RESERVE_SPACE(16 + len);
	*p++ = cpu_to_be32(len);
	p = xdr_encode_opaque_fixed(p, machine_name, len);
	*p++ = cpu_to_be32(0);				/* UID */
@@ -1646,7 +1635,7 @@ static void encode_sequence(struct xdr_stream *xdr,
	WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
	slot = tp->slots + args->sa_slotid;

-	RESERVE_SPACE(4);
+	RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN + 16);
	*p++ = cpu_to_be32(OP_SEQUENCE);

	/*
@@ -1661,7 +1650,6 @@ static void encode_sequence(struct xdr_stream *xdr,
		((u32 *)session->sess_id.data)[3],
		slot->seq_nr, args->sa_slotid,
		tp->highest_used_slotid, args->sa_cache_this);
-	RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 16);
p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
	*p++ = cpu_to_be32(slot->seq_nr);
	*p++ = cpu_to_be32(args->sa_slotid);
--
1.6.4

--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com



--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Filesystem Development]     [Linux USB Development]     [Linux Media Development]     [Video for Linux]     [Linux NILFS]     [Linux Audio Users]     [Yosemite Info]     [Linux SCSI]

  Powered by Linux