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authorAndy Adamson <andros@netapp.com>2009-04-01 09:22:37 -0400
committerBenny Halevy <bhalevy@panasas.com>2009-06-17 12:25:05 -0700
commitac72b7b3b3263ce64d55094eac1d1bde5f34e64a (patch)
tree2ecd6882caab65e33dad8cda06a71da2e6293279 /fs/nfs
parentfc01cea963a246742ff15e118ce5259e3091352c (diff)
nfs41: reset the session slot table
Separated from nfs41: schedule async session reset Do not kfree the session slot table upon session reset, just re-initialize it. Add a boolean to nfs4_proc_create_session to inidicate if this is a session reset or a session initialization. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c44
1 files changed, 41 insertions, 3 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 17768095f0c..0b121474024 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4289,6 +4289,37 @@ int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
return status;
}
+/* Reset a slot table */
+static int nfs4_reset_slot_table(struct nfs4_session *session)
+{
+ struct nfs4_slot_table *tbl = &session->fc_slot_table;
+ int i, max_slots = session->fc_attrs.max_reqs;
+ int old_max_slots = session->fc_slot_table.max_slots;
+ int ret = 0;
+
+ dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__,
+ session->fc_attrs.max_reqs, tbl);
+
+ /* 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;
+ }
+ spin_lock(&tbl->slot_tbl_lock);
+ for (i = 0; i < max_slots; ++i)
+ tbl->slots[i].seq_nr = 1;
+ tbl->highest_used_slotid = -1;
+ spin_unlock(&tbl->slot_tbl_lock);
+ dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
+ tbl, tbl->slots, tbl->max_slots);
+out:
+ dprintk("<-- %s: return %d\n", __func__, ret);
+ return ret;
+}
+
/*
* Initialize slot table
*/
@@ -4497,7 +4528,7 @@ static int _nfs4_proc_create_session(struct nfs_client *clp)
* It is the responsibility of the caller to verify the session is
* expired before calling this routine.
*/
-int nfs4_proc_create_session(struct nfs_client *clp)
+int nfs4_proc_create_session(struct nfs_client *clp, int reset)
{
int status;
unsigned *ptr;
@@ -4510,8 +4541,11 @@ int nfs4_proc_create_session(struct nfs_client *clp)
if (status)
goto out;
- /* Init the fore channel */
- status = nfs4_init_slot_table(session);
+ /* Init or reset the fore channel */
+ if (reset)
+ status = nfs4_reset_slot_table(session);
+ else
+ status = nfs4_init_slot_table(session);
dprintk("fore channel slot table initialization returned %d\n", status);
if (status)
goto out;
@@ -4520,6 +4554,10 @@ int nfs4_proc_create_session(struct nfs_client *clp)
dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
+ if (reset)
+ /* Lease time is aleady set */
+ goto out;
+
/* Get the lease time */
status = nfs4_proc_get_lease_time(clp, &fsinfo);
if (status == 0) {