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When decode_devicenotify_args() exits with no entries, we need to ensure that the struct cb_devicenotifyargs is initialised to { 0, NULL } in order to avoid problems in nfs4_callback_devicenotify(). Reported-by: <rtm@csail.mit.edu> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
223 lines
5.3 KiB
C
223 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* linux/fs/nfs/callback.h
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*
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* Copyright (C) 2004 Trond Myklebust
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*
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* NFSv4 callback definitions
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*/
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#ifndef __LINUX_FS_NFS_CALLBACK_H
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#define __LINUX_FS_NFS_CALLBACK_H
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#include <linux/sunrpc/svc.h>
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#define NFS4_CALLBACK 0x40000000
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#define NFS4_CALLBACK_XDRSIZE 2048
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#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
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enum nfs4_callback_procnum {
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CB_NULL = 0,
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CB_COMPOUND = 1,
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};
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enum nfs4_callback_opnum {
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OP_CB_GETATTR = 3,
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OP_CB_RECALL = 4,
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/* Callback operations new to NFSv4.1 */
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OP_CB_LAYOUTRECALL = 5,
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OP_CB_NOTIFY = 6,
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OP_CB_PUSH_DELEG = 7,
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OP_CB_RECALL_ANY = 8,
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OP_CB_RECALLABLE_OBJ_AVAIL = 9,
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OP_CB_RECALL_SLOT = 10,
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OP_CB_SEQUENCE = 11,
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OP_CB_WANTS_CANCELLED = 12,
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OP_CB_NOTIFY_LOCK = 13,
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OP_CB_NOTIFY_DEVICEID = 14,
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/* Callback operations new to NFSv4.2 */
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OP_CB_OFFLOAD = 15,
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OP_CB_ILLEGAL = 10044,
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};
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struct nfs4_slot;
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struct cb_process_state {
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__be32 drc_status;
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struct nfs_client *clp;
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struct nfs4_slot *slot;
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u32 minorversion;
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struct net *net;
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};
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struct cb_compound_hdr_arg {
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unsigned int taglen;
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const char *tag;
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unsigned int minorversion;
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unsigned int cb_ident; /* v4.0 callback identifier */
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unsigned nops;
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};
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struct cb_compound_hdr_res {
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__be32 *status;
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unsigned int taglen;
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const char *tag;
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__be32 *nops;
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};
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struct cb_getattrargs {
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struct nfs_fh fh;
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uint32_t bitmap[2];
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};
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struct cb_getattrres {
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__be32 status;
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uint32_t bitmap[2];
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uint64_t size;
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uint64_t change_attr;
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struct timespec64 ctime;
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struct timespec64 mtime;
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};
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struct cb_recallargs {
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struct nfs_fh fh;
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nfs4_stateid stateid;
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uint32_t truncate;
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};
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#if defined(CONFIG_NFS_V4_1)
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struct referring_call {
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uint32_t rc_sequenceid;
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uint32_t rc_slotid;
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};
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struct referring_call_list {
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struct nfs4_sessionid rcl_sessionid;
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uint32_t rcl_nrefcalls;
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struct referring_call *rcl_refcalls;
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};
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struct cb_sequenceargs {
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struct sockaddr *csa_addr;
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struct nfs4_sessionid csa_sessionid;
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uint32_t csa_sequenceid;
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uint32_t csa_slotid;
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uint32_t csa_highestslotid;
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uint32_t csa_cachethis;
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uint32_t csa_nrclists;
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struct referring_call_list *csa_rclists;
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};
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struct cb_sequenceres {
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__be32 csr_status;
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struct nfs4_sessionid csr_sessionid;
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uint32_t csr_sequenceid;
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uint32_t csr_slotid;
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uint32_t csr_highestslotid;
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uint32_t csr_target_highestslotid;
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};
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extern __be32 nfs4_callback_sequence(void *argp, void *resp,
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struct cb_process_state *cps);
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#define RCA4_TYPE_MASK_RDATA_DLG 0
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#define RCA4_TYPE_MASK_WDATA_DLG 1
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#define RCA4_TYPE_MASK_DIR_DLG 2
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#define RCA4_TYPE_MASK_FILE_LAYOUT 3
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#define RCA4_TYPE_MASK_BLK_LAYOUT 4
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#define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8
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#define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9
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#define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12
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#define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15
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#define PNFS_FF_RCA4_TYPE_MASK_READ 16
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#define PNFS_FF_RCA4_TYPE_MASK_RW 17
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#define RCA4_TYPE_MASK_ALL 0x3f31f
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struct cb_recallanyargs {
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uint32_t craa_objs_to_keep;
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uint32_t craa_type_mask;
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};
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extern __be32 nfs4_callback_recallany(void *argp, void *resp,
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struct cb_process_state *cps);
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struct cb_recallslotargs {
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uint32_t crsa_target_highest_slotid;
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};
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extern __be32 nfs4_callback_recallslot(void *argp, void *resp,
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struct cb_process_state *cps);
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struct cb_layoutrecallargs {
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uint32_t cbl_recall_type;
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uint32_t cbl_layout_type;
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uint32_t cbl_layoutchanged;
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union {
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struct {
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struct nfs_fh cbl_fh;
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struct pnfs_layout_range cbl_range;
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nfs4_stateid cbl_stateid;
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};
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struct nfs_fsid cbl_fsid;
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};
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};
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extern __be32 nfs4_callback_layoutrecall(void *argp, void *resp,
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struct cb_process_state *cps);
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struct cb_devicenotifyitem {
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uint32_t cbd_notify_type;
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uint32_t cbd_layout_type;
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struct nfs4_deviceid cbd_dev_id;
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uint32_t cbd_immediate;
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};
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struct cb_devicenotifyargs {
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uint32_t ndevs;
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struct cb_devicenotifyitem *devs;
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};
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extern __be32 nfs4_callback_devicenotify(void *argp, void *resp,
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struct cb_process_state *cps);
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struct cb_notify_lock_args {
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struct nfs_fh cbnl_fh;
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struct nfs_lowner cbnl_owner;
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bool cbnl_valid;
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};
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extern __be32 nfs4_callback_notify_lock(void *argp, void *resp,
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struct cb_process_state *cps);
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#endif /* CONFIG_NFS_V4_1 */
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#ifdef CONFIG_NFS_V4_2
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struct cb_offloadargs {
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struct nfs_fh coa_fh;
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nfs4_stateid coa_stateid;
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uint32_t error;
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uint64_t wr_count;
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struct nfs_writeverf wr_writeverf;
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};
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extern __be32 nfs4_callback_offload(void *args, void *dummy,
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struct cb_process_state *cps);
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#endif /* CONFIG_NFS_V4_2 */
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extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *);
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extern __be32 nfs4_callback_getattr(void *argp, void *resp,
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struct cb_process_state *cps);
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extern __be32 nfs4_callback_recall(void *argp, void *resp,
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struct cb_process_state *cps);
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#if IS_ENABLED(CONFIG_NFS_V4)
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extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
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extern void nfs_callback_down(int minorversion, struct net *net);
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#endif /* CONFIG_NFS_V4 */
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/*
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* nfs41: Callbacks are expected to not cause substantial latency,
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* so we limit their concurrency to 1 by setting up the maximum number
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* of slots for the backchannel.
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*/
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#define NFS41_BC_MIN_CALLBACKS 1
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#define NFS41_BC_MAX_CALLBACKS 1
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#define NFS4_MIN_NR_CALLBACK_THREADS 1
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extern unsigned int nfs_callback_set_tcpport;
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extern unsigned short nfs_callback_nr_threads;
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#endif /* __LINUX_FS_NFS_CALLBACK_H */
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