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nfs: add handling for CB_NOTIFY_LOCK in client 

For now, the callback doesn't do anything. Support for that will be
added in later patches.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Jeff Layton 2016-09-17 18:17:36 -04:00 committed by Anna Schumaker
parent a8ce377a5d
commit db783688d4
3 changed files with 71 additions and 1 deletions
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9
fs/nfs/callback.h
View File

@ -179,6 +179,15 @@ extern __be32 nfs4_callback_devicenotify(
struct cb_devicenotifyargs *args,
void *dummy, struct cb_process_state *cps);
struct cb_notify_lock_args {
struct nfs_fh cbnl_fh;
struct nfs_lowner cbnl_owner;
bool cbnl_valid;
};
extern __be32 nfs4_callback_notify_lock(struct cb_notify_lock_args *args,
void *dummy,
struct cb_process_state *cps);
#endif /* CONFIG_NFS_V4_1 */
extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *);
extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args,

12
fs/nfs/callback_proc.c
View File

@ -628,4 +628,16 @@ out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
__be32 nfs4_callback_notify_lock(struct cb_notify_lock_args *args, void *dummy,
struct cb_process_state *cps)
{
if (!cps->clp) /* set in cb_sequence */
return htonl(NFS4ERR_OP_NOT_IN_SESSION);
dprintk_rcu("NFS: CB_NOTIFY_LOCK request from %s\n",
rpc_peeraddr2str(cps->clp->cl_rpcclient, RPC_DISPLAY_ADDR));
return htonl(NFS4_OK);
}
#endif /* CONFIG_NFS_V4_1 */

51
fs/nfs/callback_xdr.c
View File

@ -35,6 +35,7 @@
(1 + 3) * 4) // seqid, 3 slotids
#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
#define CB_OP_NOTIFY_LOCK_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
#endif /* CONFIG_NFS_V4_1 */
#define NFSDBG_FACILITY NFSDBG_CALLBACK
@ -534,6 +535,49 @@ static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
return 0;
}
static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_args *args)
{
__be32 *p;
unsigned int len;
p = read_buf(xdr, 12);
if (unlikely(p == NULL))
return htonl(NFS4ERR_BADXDR);
p = xdr_decode_hyper(p, &args->cbnl_owner.clientid);
len = be32_to_cpu(*p);
p = read_buf(xdr, len);
if (unlikely(p == NULL))
return htonl(NFS4ERR_BADXDR);
/* Only try to decode if the length is right */
if (len == 20) {
p += 2; /* skip "lock id:" */
args->cbnl_owner.s_dev = be32_to_cpu(*p++);
xdr_decode_hyper(p, &args->cbnl_owner.id);
args->cbnl_valid = true;
} else {
args->cbnl_owner.s_dev = 0;
args->cbnl_owner.id = 0;
args->cbnl_valid = false;
}
return 0;
}
static __be32 decode_notify_lock_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_notify_lock_args *args)
{
__be32 status;
status = decode_fh(xdr, &args->cbnl_fh);
if (unlikely(status != 0))
goto out;
status = decode_lockowner(xdr, args);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
#endif /* CONFIG_NFS_V4_1 */
static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
@ -746,6 +790,7 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
case OP_CB_RECALL_SLOT:
case OP_CB_LAYOUTRECALL:
case OP_CB_NOTIFY_DEVICEID:
case OP_CB_NOTIFY_LOCK:
*op = &callback_ops[op_nr];
break;
@ -753,7 +798,6 @@ preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
case OP_CB_PUSH_DELEG:
case OP_CB_RECALLABLE_OBJ_AVAIL:
case OP_CB_WANTS_CANCELLED:
case OP_CB_NOTIFY_LOCK:
return htonl(NFS4ERR_NOTSUPP);
default:
@ -1006,6 +1050,11 @@ static struct callback_op callback_ops[] = {
.decode_args = (callback_decode_arg_t)decode_recallslot_args,
.res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ,
},
[OP_CB_NOTIFY_LOCK] = {
.process_op = (callback_process_op_t)nfs4_callback_notify_lock,
.decode_args = (callback_decode_arg_t)decode_notify_lock_args,
.res_maxsize = CB_OP_NOTIFY_LOCK_RES_MAXSZ,
},
#endif /* CONFIG_NFS_V4_1 */
};