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Diffstat (limited to 'fs/nfs/callback.h')
| -rw-r--r-- | fs/nfs/callback.h | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h new file mode 100644 index 000000000..5d5227ce4 --- /dev/null +++ b/fs/nfs/callback.h @@ -0,0 +1,221 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 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 +#include <linux/sunrpc/svc.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, +/* Callback operations new to NFSv4.2 */ + OP_CB_OFFLOAD = 15, + OP_CB_ILLEGAL = 10044, +}; + +struct nfs4_slot; +struct cb_process_state { + __be32 drc_status; + struct nfs_client *clp; + struct nfs4_slot *slot; + u32 minorversion; + struct net *net; +}; + +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 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 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(void *argp, void *resp, + struct cb_process_state *cps); + +#define RCA4_TYPE_MASK_RDATA_DLG 0 +#define RCA4_TYPE_MASK_WDATA_DLG 1 +#define RCA4_TYPE_MASK_DIR_DLG 2 +#define RCA4_TYPE_MASK_FILE_LAYOUT 3 +#define RCA4_TYPE_MASK_BLK_LAYOUT 4 +#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8 +#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9 +#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12 +#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15 +#define RCA4_TYPE_MASK_ALL 0xf31f + +struct cb_recallanyargs { + uint32_t craa_objs_to_keep; + uint32_t craa_type_mask; +}; + +extern __be32 nfs4_callback_recallany(void *argp, void *resp, + struct cb_process_state *cps); + +struct cb_recallslotargs { + uint32_t crsa_target_highest_slotid; +}; +extern __be32 nfs4_callback_recallslot(void *argp, void *resp, + struct cb_process_state *cps); + +struct cb_layoutrecallargs { + uint32_t cbl_recall_type; + uint32_t cbl_layout_type; + uint32_t cbl_layoutchanged; + union { + struct { + struct nfs_fh cbl_fh; + struct pnfs_layout_range cbl_range; + nfs4_stateid cbl_stateid; + }; + struct nfs_fsid cbl_fsid; + }; +}; + +extern __be32 nfs4_callback_layoutrecall(void *argp, void *resp, + struct cb_process_state *cps); + +struct cb_devicenotifyitem { + uint32_t cbd_notify_type; + uint32_t cbd_layout_type; + struct nfs4_deviceid cbd_dev_id; + uint32_t cbd_immediate; +}; + +struct cb_devicenotifyargs { + uint32_t ndevs; + struct cb_devicenotifyitem *devs; +}; + +extern __be32 nfs4_callback_devicenotify(void *argp, void *resp, + 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(void *argp, void *resp, + struct cb_process_state *cps); +#endif /* CONFIG_NFS_V4_1 */ +#ifdef CONFIG_NFS_V4_2 +struct cb_offloadargs { + struct nfs_fh coa_fh; + nfs4_stateid coa_stateid; + uint32_t error; + uint64_t wr_count; + struct nfs_writeverf wr_writeverf; +}; + +extern __be32 nfs4_callback_offload(void *args, void *dummy, + struct cb_process_state *cps); +#endif /* CONFIG_NFS_V4_2 */ +extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *); +extern __be32 nfs4_callback_getattr(void *argp, void *resp, + struct cb_process_state *cps); +extern __be32 nfs4_callback_recall(void *argp, void *resp, + struct cb_process_state *cps); +#if IS_ENABLED(CONFIG_NFS_V4) +extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); +extern void nfs_callback_down(int minorversion, struct net *net); +#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 + +#define NFS4_MIN_NR_CALLBACK_THREADS 1 + +extern unsigned int nfs_callback_set_tcpport; +extern unsigned short nfs_callback_nr_threads; + +#endif /* __LINUX_FS_NFS_CALLBACK_H */ |