diff options
| -rw-r--r-- | fs/nfs/nfs4proc.c | 44 |
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) { |