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nfs41: resize slot table in reset 

When session is reset, client can renegotiate slot table size.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2010-01-14 17:45:10 -05:00 committed by Trond Myklebust
parent b9efa1b27e
commit 104aeba484
1 changed files with 21 additions and 19 deletions
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40
fs/nfs/nfs4proc.c
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@ -4618,26 +4618,32 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
/*
* Reset a slot table
*/
static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
int old_max_slots, int ivalue)
static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
int ivalue)
{
struct nfs4_slot *new = NULL;
int i;
int ret = 0;
dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
max_reqs, tbl->max_slots);
/*
* Until we have dynamic slot table adjustment, insist
* upon the same slot table size
*/
if (max_slots != old_max_slots) {
dprintk("%s reset slot table does't match old\n",
__func__);
ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
goto out;
/* Does the newly negotiated max_reqs match the existing slot table? */
if (max_reqs != tbl->max_slots) {
ret = -ENOMEM;
new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
GFP_KERNEL);
if (!new)
goto out;
ret = 0;
kfree(tbl->slots);
}
spin_lock(&tbl->slot_tbl_lock);
for (i = 0; i < max_slots; ++i)
if (new) {
tbl->slots = new;
tbl->max_slots = max_reqs;
}
for (i = 0; i < tbl->max_slots; ++i)
tbl->slots[i].seq_nr = ivalue;
spin_unlock(&tbl->slot_tbl_lock);
dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
@ -4655,16 +4661,12 @@ static int nfs4_reset_slot_tables(struct nfs4_session *session)
int status;
status = nfs4_reset_slot_table(&session->fc_slot_table,
session->fc_attrs.max_reqs,
session->fc_slot_table.max_slots,
1);
session->fc_attrs.max_reqs, 1);
if (status)
return status;
status = nfs4_reset_slot_table(&session->bc_slot_table,
session->bc_attrs.max_reqs,
session->bc_slot_table.max_slots,
0);
session->bc_attrs.max_reqs, 0);
return status;
}