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nfs41: implement cb_recall_slot

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Drain the fore channel and reset the max_slots to the new value.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2010-01-20 16:06:27 -05:00 • committed by Trond Myklebust
parent 4911096f1a
commit b9efa1b27e
6 changed files with 109 additions and 1 deletions
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32
fs/nfs/callback_proc.c
View file

@ -361,4 +361,36 @@ out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
/* Reduce the fore channel's max_slots to the target value */
unsigned nfs4_callback_recallslot(struct cb_recallslotargs *args, void *dummy)
{
struct nfs_client *clp;
struct nfs4_slot_table *fc_tbl;
int status;
status = htonl(NFS4ERR_OP_NOT_IN_SESSION);
clp = nfs_find_client(args->crsa_addr, 4);
if (clp == NULL)
goto out;
dprintk("NFS: CB_RECALL_SLOT request from %s target max slots %d\n",
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
args->crsa_target_max_slots);
fc_tbl = &clp->cl_session->fc_slot_table;
status = htonl(NFS4ERR_BAD_HIGH_SLOT);
if (args->crsa_target_max_slots >= fc_tbl->max_slots ||
args->crsa_target_max_slots < 1)
goto out;
fc_tbl->target_max_slots = args->crsa_target_max_slots;
nfs41_handle_recall_slot(clp);
status = htonl(NFS4_OK);
nfs_put_client(clp); /* balance nfs_find_client */
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
#endif /* CONFIG_NFS_V4_1 */