| /* |
| * linux/fs/nfs/callback.h |
| * |
| * Copyright (C) 2004 Trond Myklebust |
| * |
| * NFSv4 callback definitions |
| */ |
| #ifndef __LINUX_FS_NFS_CALLBACK_H |
| #define __LINUX_FS_NFS_CALLBACK_H |
| |
| #define NFS4_CALLBACK 0x40000000 |
| #define NFS4_CALLBACK_XDRSIZE 2048 |
| #define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE) |
| |
| enum nfs4_callback_procnum { |
| CB_NULL = 0, |
| CB_COMPOUND = 1, |
| }; |
| |
| enum nfs4_callback_opnum { |
| OP_CB_GETATTR = 3, |
| OP_CB_RECALL = 4, |
| /* Callback operations new to NFSv4.1 */ |
| OP_CB_LAYOUTRECALL = 5, |
| OP_CB_NOTIFY = 6, |
| OP_CB_PUSH_DELEG = 7, |
| OP_CB_RECALL_ANY = 8, |
| OP_CB_RECALLABLE_OBJ_AVAIL = 9, |
| OP_CB_RECALL_SLOT = 10, |
| OP_CB_SEQUENCE = 11, |
| OP_CB_WANTS_CANCELLED = 12, |
| OP_CB_NOTIFY_LOCK = 13, |
| OP_CB_NOTIFY_DEVICEID = 14, |
| OP_CB_ILLEGAL = 10044, |
| }; |
| |
| struct cb_process_state { |
| __be32 drc_status; |
| struct nfs_client *clp; |
| struct nfs4_sessionid *svc_sid; /* v4.1 callback service sessionid */ |
| }; |
| |
| struct cb_compound_hdr_arg { |
| unsigned int taglen; |
| const char *tag; |
| unsigned int minorversion; |
| unsigned int cb_ident; /* v4.0 callback identifier */ |
| unsigned nops; |
| }; |
| |
| struct cb_compound_hdr_res { |
| __be32 *status; |
| unsigned int taglen; |
| const char *tag; |
| __be32 *nops; |
| }; |
| |
| struct cb_getattrargs { |
| struct sockaddr *addr; |
| struct nfs_fh fh; |
| uint32_t bitmap[2]; |
| }; |
| |
| struct cb_getattrres { |
| __be32 status; |
| uint32_t bitmap[2]; |
| uint64_t size; |
| uint64_t change_attr; |
| struct timespec ctime; |
| struct timespec mtime; |
| }; |
| |
| struct cb_recallargs { |
| struct sockaddr *addr; |
| struct nfs_fh fh; |
| nfs4_stateid stateid; |
| uint32_t truncate; |
| }; |
| |
| #if defined(CONFIG_NFS_V4_1) |
| |
| struct referring_call { |
| uint32_t rc_sequenceid; |
| uint32_t rc_slotid; |
| }; |
| |
| struct referring_call_list { |
| struct nfs4_sessionid rcl_sessionid; |
| uint32_t rcl_nrefcalls; |
| struct referring_call *rcl_refcalls; |
| }; |
| |
| struct cb_sequenceargs { |
| struct sockaddr *csa_addr; |
| struct nfs4_sessionid csa_sessionid; |
| uint32_t csa_sequenceid; |
| uint32_t csa_slotid; |
| uint32_t csa_highestslotid; |
| uint32_t csa_cachethis; |
| uint32_t csa_nrclists; |
| struct referring_call_list *csa_rclists; |
| }; |
| |
| struct cb_sequenceres { |
| __be32 csr_status; |
| struct nfs4_sessionid csr_sessionid; |
| uint32_t csr_sequenceid; |
| uint32_t csr_slotid; |
| uint32_t csr_highestslotid; |
| uint32_t csr_target_highestslotid; |
| }; |
| |
| extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, |
| struct cb_sequenceres *res, |
| struct cb_process_state *cps); |
| |
| extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, |
| const nfs4_stateid *stateid); |
| |
| #define RCA4_TYPE_MASK_RDATA_DLG 0 |
| #define RCA4_TYPE_MASK_WDATA_DLG 1 |
| |
| struct cb_recallanyargs { |
| struct sockaddr *craa_addr; |
| uint32_t craa_objs_to_keep; |
| uint32_t craa_type_mask; |
| }; |
| |
| extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, |
| void *dummy, |
| struct cb_process_state *cps); |
| |
| struct cb_recallslotargs { |
| struct sockaddr *crsa_addr; |
| uint32_t crsa_target_max_slots; |
| }; |
| extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, |
| void *dummy, |
| struct cb_process_state *cps); |
| |
| extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses); |
| extern void nfs4_cb_take_slot(struct nfs_client *clp); |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, |
| struct cb_getattrres *res, |
| struct cb_process_state *cps); |
| extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, |
| struct cb_process_state *cps); |
| #ifdef CONFIG_NFS_V4 |
| extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); |
| extern void nfs_callback_down(int minorversion); |
| extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, |
| const nfs4_stateid *stateid); |
| extern int nfs4_set_callback_sessionid(struct nfs_client *clp); |
| #endif /* CONFIG_NFS_V4 */ |
| /* |
| * nfs41: Callbacks are expected to not cause substantial latency, |
| * so we limit their concurrency to 1 by setting up the maximum number |
| * of slots for the backchannel. |
| */ |
| #define NFS41_BC_MIN_CALLBACKS 1 |
| #define NFS41_BC_MAX_CALLBACKS 1 |
| |
| extern unsigned int nfs_callback_set_tcpport; |
| extern unsigned short nfs_callback_tcpport; |
| extern unsigned short nfs_callback_tcpport6; |
| |
| #endif /* __LINUX_FS_NFS_CALLBACK_H */ |