diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfs/callback_proc.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index defa9b4..631b44c 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -225,6 +225,61 @@ validate_seqid(struct nfs4_slot_table *tbl, u32 slotid, u32 seqid) return NULL; } +/* + * For each referring call triple, check the session's slot table for + * a match. If the slot is in use and the sequence numbers match, the + * client is still waiting for a response to the original request. + */ +static bool referring_call_exists(struct nfs_client *clp, + uint32_t nrclists, + struct referring_call_list *rclists) +{ + bool status = 0; + int i, j; + struct nfs4_session *session; + struct nfs4_slot_table *tbl; + struct referring_call_list *rclist; + struct referring_call *ref; + + /* + * XXX When client trunking is implemented, this becomes + * a session lookup from within the loop + */ + session = clp->cl_session; + tbl = &session->fc_slot_table; + + for (i = 0; i < nrclists; i++) { + rclist = &rclists[i]; + if (memcmp(session->sess_id.data, + rclist->rcl_sessionid.data, + NFS4_MAX_SESSIONID_LEN) != 0) + continue; + + for (j = 0; j < rclist->rcl_nrefcalls; j++) { + ref = &rclist->rcl_refcalls[j]; + + dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u " + "slotid %u\n", __func__, + ((u32 *)&rclist->rcl_sessionid.data)[0], + ((u32 *)&rclist->rcl_sessionid.data)[1], + ((u32 *)&rclist->rcl_sessionid.data)[2], + ((u32 *)&rclist->rcl_sessionid.data)[3], + ref->rc_sequenceid, ref->rc_slotid); + + spin_lock(&tbl->slot_tbl_lock); + status = (test_bit(ref->rc_slotid, tbl->used_slots) && + tbl->slots[ref->rc_slotid].seq_nr == + ref->rc_sequenceid); + spin_unlock(&tbl->slot_tbl_lock); + if (status) + goto out; + } + } + +out: + return status; +} + /* FIXME: referring calls should be processed */ unsigned nfs4_callback_sequence(struct cb_sequenceargs *args, struct cb_sequenceres *res) |
