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NFSv4.1: Move the RPC timestamp out of the slot. 

Shave a few bytes off the slot table size by moving the RPC timestamp
into the sequence results.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2012-12-15 15:21:52 -05:00
parent e879444084
commit 8e63b6a8ad
4 changed files with 9 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
fs/nfs/nfs4proc.c
View File

@ -419,7 +419,6 @@ static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *
{
struct nfs4_session *session;
struct nfs4_slot *slot;
unsigned long timestamp;
struct nfs_client *clp;
int ret = 1;
@ -444,9 +443,8 @@ static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *
case 0:
/* Update the slot's sequence and clientid lease timer */
++slot->seq_nr;
timestamp = slot->renewal_time;
clp = session->clp;
do_renew_lease(clp, timestamp);
do_renew_lease(clp, res->sr_timestamp);
/* Check sequence flags */
if (res->sr_status_flags != 0)
nfs4_schedule_lease_recovery(clp);
@ -473,10 +471,11 @@ static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *
* Could this slot have been previously retired?
* If so, then the server may be expecting seq_nr = 1!
*/
if (slot->seq_nr == 1)
break;
slot->seq_nr = 1;
goto retry_nowait;
if (slot->seq_nr != 1) {
slot->seq_nr = 1;
goto retry_nowait;
}
break;
case -NFS4ERR_SEQ_FALSE_RETRY:
++slot->seq_nr;
goto retry_nowait;
@ -567,6 +566,7 @@ int nfs41_setup_sequence(struct nfs4_session *session,
slot->slot_nr, slot->seq_nr);
res->sr_slot = slot;
res->sr_timestamp = jiffies;
res->sr_status_flags = 0;
/*
* sr_status is only set in decode_sequence, and so will remain

3
fs/nfs/nfs4session.c
View File

@ -143,7 +143,6 @@ struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
if (slotid > tbl->highest_used_slotid ||
tbl->highest_used_slotid == NFS4_NO_SLOT)
tbl->highest_used_slotid = slotid;
ret->renewal_time = jiffies;
ret->generation = tbl->generation;
out:
@ -228,9 +227,9 @@ static bool nfs41_assign_slot(struct rpc_task *task, void *pslot)
if (nfs4_session_draining(tbl->session) && !args->sa_privileged)
return false;
slot->renewal_time = jiffies;
slot->generation = tbl->generation;
args->sa_slot = slot;
res->sr_timestamp = jiffies;
res->sr_slot = slot;
res->sr_status_flags = 0;
res->sr_status = 1;

1
fs/nfs/nfs4session.h
View File

@ -19,7 +19,6 @@ struct nfs4_slot {
struct nfs4_slot_table *table;
struct nfs4_slot *next;
unsigned long generation;
unsigned long renewal_time;
u32 slot_nr;
u32 seq_nr;
};

1
include/linux/nfs_xdr.h
View File

@ -194,6 +194,7 @@ struct nfs4_sequence_args {
struct nfs4_sequence_res {
struct nfs4_slot *sr_slot; /* slot used to send request */
unsigned long sr_timestamp;
int sr_status; /* sequence operation status */
u32 sr_status_flags;
u32 sr_highest_slotid;