From db783688d4a20bae1b77c5c96a0ad3eb3079f9f6 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Sat, 17 Sep 2016 18:17:36 -0400 Subject: 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 Signed-off-by: Anna Schumaker --- fs/nfs/callback_xdr.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) (limited to 'fs/nfs/callback_xdr.c') diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index a710825f3d61..eb094c6011d8 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -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 */ }; -- cgit v1.2.3