--- /dev/null
+/*
+ * Copyright (c) 2001 The Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Kendrick Smith <kmsmith@umich.edu>
+ * Andy Adamson <andros@umich.edu>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _NFSD4_STATE_H
+#define _NFSD4_STATE_H
+
+#include <linux/idr.h>
+#include <linux/sunrpc/svc_xprt.h>
+#include "nfsfh.h"
+
+typedef struct {
+ u32 cl_boot;
+ u32 cl_id;
+} clientid_t;
+
+typedef struct {
+ clientid_t so_clid;
+ u32 so_id;
+} stateid_opaque_t;
+
+typedef struct {
+ u32 si_generation;
+ stateid_opaque_t si_opaque;
+} stateid_t;
+
+#define STATEID_FMT "(%08x/%08x/%08x/%08x)"
+#define STATEID_VAL(s) \
+ (s)->si_opaque.so_clid.cl_boot, \
+ (s)->si_opaque.so_clid.cl_id, \
+ (s)->si_opaque.so_id, \
+ (s)->si_generation
+
+struct nfsd4_callback {
+ struct nfs4_client *cb_clp;
+ u32 cb_minorversion;
+ struct rpc_message cb_msg;
+ struct nfsd4_callback_ops *cb_ops;
+ struct work_struct cb_work;
+ int cb_status;
+ bool cb_need_restart;
+};
+
+struct nfsd4_callback_ops {
+ void (*prepare)(struct nfsd4_callback *);
+ int (*done)(struct nfsd4_callback *, struct rpc_task *);
+ void (*release)(struct nfsd4_callback *);
+};
+
+/*
+ * A core object that represents a "common" stateid. These are generally
+ * embedded within the different (more specific) stateid objects and contain
+ * fields that are of general use to any stateid.
+ */
+struct nfs4_stid {
+ atomic_t sc_count;
+#define NFS4_OPEN_STID 1
+#define NFS4_LOCK_STID 2
+#define NFS4_DELEG_STID 4
+/* For an open stateid kept around *only* to process close replays: */
+#define NFS4_CLOSED_STID 8
+/* For a deleg stateid kept around only to process free_stateid's: */
+#define NFS4_REVOKED_DELEG_STID 16
+#define NFS4_CLOSED_DELEG_STID 32
+#define NFS4_LAYOUT_STID 64
+ unsigned char sc_type;
+ stateid_t sc_stateid;
+ struct nfs4_client *sc_client;
+ struct nfs4_file *sc_file;
+ void (*sc_free)(struct nfs4_stid *);
+};
+
+/*
+ * Represents a delegation stateid. The nfs4_client holds references to these
+ * and they are put when it is being destroyed or when the delegation is
+ * returned by the client:
+ *
+ * o 1 reference as long as a delegation is still in force (taken when it's
+ * alloc'd, put when it's returned or revoked)
+ *
+ * o 1 reference as long as a recall rpc is in progress (taken when the lease
+ * is broken, put when the rpc exits)
+ *
+ * o 1 more ephemeral reference for each nfsd thread currently doing something
+ * with that delegation without holding the cl_lock
+ *
+ * If the server attempts to recall a delegation and the client doesn't do so
+ * before a timeout, the server may also revoke the delegation. In that case,
+ * the object will either be destroyed (v4.0) or moved to a per-client list of
+ * revoked delegations (v4.1+).
+ *
+ * This object is a superset of the nfs4_stid.
+ */
+struct nfs4_delegation {
+ struct nfs4_stid dl_stid; /* must be first field */
+ struct list_head dl_perfile;
+ struct list_head dl_perclnt;
+ struct list_head dl_recall_lru; /* delegation recalled */
+ struct nfs4_clnt_odstate *dl_clnt_odstate;
+ u32 dl_type;
+ time_t dl_time;
+/* For recall: */
+ int dl_retries;
+ struct nfsd4_callback dl_recall;
+};
+
+#define cb_to_delegation(cb) \
+ container_of(cb, struct nfs4_delegation, dl_recall)
+
+/* client delegation callback info */
+struct nfs4_cb_conn {
+ /* SETCLIENTID info */
+ struct sockaddr_storage cb_addr;
+ struct sockaddr_storage cb_saddr;
+ size_t cb_addrlen;
+ u32 cb_prog; /* used only in 4.0 case;
+ per-session otherwise */
+ u32 cb_ident; /* minorversion 0 only */
+ struct svc_xprt *cb_xprt; /* minorversion 1 only */
+};
+
+static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
+{
+ return container_of(s, struct nfs4_delegation, dl_stid);
+}
+
+/* Maximum number of slots per session. 160 is useful for long haul TCP */
+#define NFSD_MAX_SLOTS_PER_SESSION 160
+/* Maximum number of operations per session compound */
+#define NFSD_MAX_OPS_PER_COMPOUND 16
+/* Maximum session per slot cache size */
+#define NFSD_SLOT_CACHE_SIZE 2048
+/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
+#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
+#define NFSD_MAX_MEM_PER_SESSION \
+ (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
+
+struct nfsd4_slot {
+ u32 sl_seqid;
+ __be32 sl_status;
+ u32 sl_datalen;
+ u16 sl_opcnt;
+#define NFSD4_SLOT_INUSE (1 << 0)
+#define NFSD4_SLOT_CACHETHIS (1 << 1)
+#define NFSD4_SLOT_INITIALIZED (1 << 2)
+ u8 sl_flags;
+ char sl_data[];
+};
+
+struct nfsd4_channel_attrs {
+ u32 headerpadsz;
+ u32 maxreq_sz;
+ u32 maxresp_sz;
+ u32 maxresp_cached;
+ u32 maxops;
+ u32 maxreqs;
+ u32 nr_rdma_attrs;
+ u32 rdma_attrs;
+};
+
+struct nfsd4_cb_sec {
+ u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
+ kuid_t uid;
+ kgid_t gid;
+};
+
+struct nfsd4_create_session {
+ clientid_t clientid;
+ struct nfs4_sessionid sessionid;
+ u32 seqid;
+ u32 flags;
+ struct nfsd4_channel_attrs fore_channel;
+ struct nfsd4_channel_attrs back_channel;
+ u32 callback_prog;
+ struct nfsd4_cb_sec cb_sec;
+};
+
+struct nfsd4_backchannel_ctl {
+ u32 bc_cb_program;
+ struct nfsd4_cb_sec bc_cb_sec;
+};
+
+struct nfsd4_bind_conn_to_session {
+ struct nfs4_sessionid sessionid;
+ u32 dir;
+};
+
+/* The single slot clientid cache structure */
+struct nfsd4_clid_slot {
+ u32 sl_seqid;
+ __be32 sl_status;
+ struct nfsd4_create_session sl_cr_ses;
+};
+
+struct nfsd4_conn {
+ struct list_head cn_persession;
+ struct svc_xprt *cn_xprt;
+ struct svc_xpt_user cn_xpt_user;
+ struct nfsd4_session *cn_session;
+/* CDFC4_FORE, CDFC4_BACK: */
+ unsigned char cn_flags;
+};
+
+/*
+ * Representation of a v4.1+ session. These are refcounted in a similar fashion
+ * to the nfs4_client. References are only taken when the server is actively
+ * working on the object (primarily during the processing of compounds).
+ */
+struct nfsd4_session {
+ atomic_t se_ref;
+ struct list_head se_hash; /* hash by sessionid */
+ struct list_head se_perclnt;
+/* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
+#define NFS4_SESSION_DEAD 0x010
+ u32 se_flags;
+ struct nfs4_client *se_client;
+ struct nfs4_sessionid se_sessionid;
+ struct nfsd4_channel_attrs se_fchannel;
+ struct nfsd4_channel_attrs se_bchannel;
+ struct nfsd4_cb_sec se_cb_sec;
+ struct list_head se_conns;
+ u32 se_cb_prog;
+ u32 se_cb_seq_nr;
+ struct nfsd4_slot *se_slots[]; /* forward channel slots */
+};
+
+/* formatted contents of nfs4_sessionid */
+struct nfsd4_sessionid {
+ clientid_t clientid;
+ u32 sequence;
+ u32 reserved;
+};
+
+#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
+
+/*
+ * struct nfs4_client - one per client. Clientids live here.
+ *
+ * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0)
+ * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped.
+ * Each nfsd_net_ns object contains a set of these and they are tracked via
+ * short and long form clientid. They are hashed and searched for under the
+ * per-nfsd_net client_lock spinlock.
+ *
+ * References to it are only held during the processing of compounds, and in
+ * certain other operations. In their "resting state" they have a refcount of
+ * 0. If they are not renewed within a lease period, they become eligible for
+ * destruction by the laundromat.
+ *
+ * These objects can also be destroyed prematurely by the fault injection code,
+ * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates.
+ * Care is taken *not* to do this however when the objects have an elevated
+ * refcount.
+ *
+ * o Each nfs4_client is hashed by clientid
+ *
+ * o Each nfs4_clients is also hashed by name (the opaque quantity initially
+ * sent by the client to identify itself).
+ *
+ * o cl_perclient list is used to ensure no dangling stateowner references
+ * when we expire the nfs4_client
+ */
+struct nfs4_client {
+ struct list_head cl_idhash; /* hash by cl_clientid.id */
+ struct rb_node cl_namenode; /* link into by-name trees */
+ struct list_head *cl_ownerstr_hashtbl;
+ struct list_head cl_openowners;
+ struct idr cl_stateids; /* stateid lookup */
+ struct list_head cl_delegations;
+ struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
+ struct list_head cl_lru; /* tail queue */
+#ifdef CONFIG_NFSD_PNFS
+ struct list_head cl_lo_states; /* outstanding layout states */
+#endif
+ struct xdr_netobj cl_name; /* id generated by client */
+ nfs4_verifier cl_verifier; /* generated by client */
+ time_t cl_time; /* time of last lease renewal */
+ struct sockaddr_storage cl_addr; /* client ipaddress */
+ bool cl_mach_cred; /* SP4_MACH_CRED in force */
+ struct svc_cred cl_cred; /* setclientid principal */
+ clientid_t cl_clientid; /* generated by server */
+ nfs4_verifier cl_confirm; /* generated by server */
+ u32 cl_minorversion;
+
+ /* for v4.0 and v4.1 callbacks: */
+ struct nfs4_cb_conn cl_cb_conn;
+#define NFSD4_CLIENT_CB_UPDATE (0)
+#define NFSD4_CLIENT_CB_KILL (1)
+#define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
+#define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
+#define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
+#define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
+#define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
+ 1 << NFSD4_CLIENT_CB_KILL)
+ unsigned long cl_flags;
+ struct rpc_cred *cl_cb_cred;
+ struct rpc_clnt *cl_cb_client;
+ u32 cl_cb_ident;
+#define NFSD4_CB_UP 0
+#define NFSD4_CB_UNKNOWN 1
+#define NFSD4_CB_DOWN 2
+#define NFSD4_CB_FAULT 3
+ int cl_cb_state;
+ struct nfsd4_callback cl_cb_null;
+ struct nfsd4_session *cl_cb_session;
+
+ /* for all client information that callback code might need: */
+ spinlock_t cl_lock;
+
+ /* for nfs41 */
+ struct list_head cl_sessions;
+ struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
+ u32 cl_exchange_flags;
+ /* number of rpc's in progress over an associated session: */
+ atomic_t cl_refcount;
+
+ /* for nfs41 callbacks */
+ /* We currently support a single back channel with a single slot */
+ unsigned long cl_cb_slot_busy;
+ struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
+ /* wait here for slots */
+ struct net *net;
+};
+
+/* struct nfs4_client_reset
+ * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
+ * upon lease reset, or from upcall to state_daemon (to read in state
+ * from non-volitile storage) upon reboot.
+ */
+struct nfs4_client_reclaim {
+ struct list_head cr_strhash; /* hash by cr_name */
+ struct nfs4_client *cr_clp; /* pointer to associated clp */
+ char cr_recdir[HEXDIR_LEN]; /* recover dir */
+};
+
+static inline void
+update_stateid(stateid_t *stateid)
+{
+ stateid->si_generation++;
+ /* Wraparound recommendation from 3530bis-13 9.1.3.2: */
+ if (stateid->si_generation == 0)
+ stateid->si_generation = 1;
+}
+
+/* A reasonable value for REPLAY_ISIZE was estimated as follows:
+ * The OPEN response, typically the largest, requires
+ * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
+ * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
+ * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
+ */
+
+#define NFSD4_REPLAY_ISIZE 112
+
+/*
+ * Replay buffer, where the result of the last seqid-mutating operation
+ * is cached.
+ */
+struct nfs4_replay {
+ __be32 rp_status;
+ unsigned int rp_buflen;
+ char *rp_buf;
+ struct knfsd_fh rp_openfh;
+ struct mutex rp_mutex;
+ char rp_ibuf[NFSD4_REPLAY_ISIZE];
+};
+
+struct nfs4_stateowner;
+
+struct nfs4_stateowner_operations {
+ void (*so_unhash)(struct nfs4_stateowner *);
+ void (*so_free)(struct nfs4_stateowner *);
+};
+
+/*
+ * A core object that represents either an open or lock owner. The object and
+ * lock owner objects have one of these embedded within them. Refcounts and
+ * other fields common to both owner types are contained within these
+ * structures.
+ */
+struct nfs4_stateowner {
+ struct list_head so_strhash;
+ struct list_head so_stateids;
+ struct nfs4_client *so_client;
+ const struct nfs4_stateowner_operations *so_ops;
+ /* after increment in nfsd4_bump_seqid, represents the next
+ * sequence id expected from the client: */
+ atomic_t so_count;
+ u32 so_seqid;
+ struct xdr_netobj so_owner; /* open owner name */
+ struct nfs4_replay so_replay;
+ bool so_is_open_owner;
+};
+
+/*
+ * When a file is opened, the client provides an open state owner opaque string
+ * that indicates the "owner" of that open. These objects are refcounted.
+ * References to it are held by each open state associated with it. This object
+ * is a superset of the nfs4_stateowner struct.
+ */
+struct nfs4_openowner {
+ struct nfs4_stateowner oo_owner; /* must be first field */
+ struct list_head oo_perclient;
+ /*
+ * We keep around openowners a little while after last close,
+ * which saves clients from having to confirm, and allows us to
+ * handle close replays if they come soon enough. The close_lru
+ * is a list of such openowners, to be reaped by the laundromat
+ * thread eventually if they remain unused:
+ */
+ struct list_head oo_close_lru;
+ struct nfs4_ol_stateid *oo_last_closed_stid;
+ time_t oo_time; /* time of placement on so_close_lru */
+#define NFS4_OO_CONFIRMED 1
+ unsigned char oo_flags;
+};
+
+/*
+ * Represents a generic "lockowner". Similar to an openowner. References to it
+ * are held by the lock stateids that are created on its behalf. This object is
+ * a superset of the nfs4_stateowner struct (or would be if it needed any extra
+ * fields).
+ */
+struct nfs4_lockowner {
+ struct nfs4_stateowner lo_owner; /* must be first element */
+};
+
+static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
+{
+ return container_of(so, struct nfs4_openowner, oo_owner);
+}
+
+static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
+{
+ return container_of(so, struct nfs4_lockowner, lo_owner);
+}
+
+/*
+ * Per-client state indicating no. of opens and outstanding delegations
+ * on a file from a particular client.'od' stands for 'open & delegation'
+ */
+struct nfs4_clnt_odstate {
+ struct nfs4_client *co_client;
+ struct nfs4_file *co_file;
+ struct list_head co_perfile;
+ atomic_t co_odcount;
+};
+
+/*
+ * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
+ *
+ * These objects are global. nfsd keeps one instance of a nfs4_file per
+ * filehandle (though it may keep multiple file descriptors for each). Each
+ * inode can have multiple filehandles associated with it, so there is
+ * (potentially) a many to one relationship between this struct and struct
+ * inode.
+ *
+ * These are hashed by filehandle in the file_hashtbl, which is protected by
+ * the global state_lock spinlock.
+ */
+struct nfs4_file {
+ atomic_t fi_ref;
+ spinlock_t fi_lock;
+ struct hlist_node fi_hash; /* hash on fi_fhandle */
+ struct list_head fi_stateids;
+ union {
+ struct list_head fi_delegations;
+ struct rcu_head fi_rcu;
+ };
+ struct list_head fi_clnt_odstate;
+ /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
+ struct file * fi_fds[3];
+ /*
+ * Each open or lock stateid contributes 0-4 to the counts
+ * below depending on which bits are set in st_access_bitmap:
+ * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
+ * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
+ * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
+ */
+ atomic_t fi_access[2];
+ u32 fi_share_deny;
+ struct file *fi_deleg_file;
+ int fi_delegees;
+ struct knfsd_fh fi_fhandle;
+ bool fi_had_conflict;
+#ifdef CONFIG_NFSD_PNFS
+ struct list_head fi_lo_states;
+ atomic_t fi_lo_recalls;
+#endif
+};
+
+/*
+ * A generic struct representing either a open or lock stateid. The nfs4_client
+ * holds a reference to each of these objects, and they in turn hold a
+ * reference to their respective stateowners. The client's reference is
+ * released in response to a close or unlock (depending on whether it's an open
+ * or lock stateid) or when the client is being destroyed.
+ *
+ * In the case of v4.0 open stateids, these objects are preserved for a little
+ * while after close in order to handle CLOSE replays. Those are eventually
+ * reclaimed via a LRU scheme by the laundromat.
+ *
+ * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock".
+ * Better suggestions welcome.
+ */
+struct nfs4_ol_stateid {
+ struct nfs4_stid st_stid; /* must be first field */
+ struct list_head st_perfile;
+ struct list_head st_perstateowner;
+ struct list_head st_locks;
+ struct nfs4_stateowner * st_stateowner;
+ struct nfs4_clnt_odstate * st_clnt_odstate;
+ unsigned char st_access_bmap;
+ unsigned char st_deny_bmap;
+ struct nfs4_ol_stateid * st_openstp;
+};
+
+static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
+{
+ return container_of(s, struct nfs4_ol_stateid, st_stid);
+}
+
+struct nfs4_layout_stateid {
+ struct nfs4_stid ls_stid;
+ struct list_head ls_perclnt;
+ struct list_head ls_perfile;
+ spinlock_t ls_lock;
+ struct list_head ls_layouts;
+ u32 ls_layout_type;
+ struct file *ls_file;
+ struct nfsd4_callback ls_recall;
+ stateid_t ls_recall_sid;
+ bool ls_recalled;
+};
+
+static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
+{
+ return container_of(s, struct nfs4_layout_stateid, ls_stid);
+}
+
+/* flags for preprocess_seqid_op() */
+#define RD_STATE 0x00000010
+#define WR_STATE 0x00000020
+
+enum nfsd4_cb_op {
+ NFSPROC4_CLNT_CB_NULL = 0,
+ NFSPROC4_CLNT_CB_RECALL,
+ NFSPROC4_CLNT_CB_LAYOUT,
+ NFSPROC4_CLNT_CB_SEQUENCE,
+};
+
+
+struct nfsd4_compound_state;
+struct nfsd_net;
+
+extern __be32 nfs4_preprocess_stateid_op(struct net *net,
+ struct nfsd4_compound_state *cstate,
+ stateid_t *stateid, int flags, struct file **filp);
+__be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
+ stateid_t *stateid, unsigned char typemask,
+ struct nfs4_stid **s, struct nfsd_net *nn);
+struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl,
+ struct kmem_cache *slab);
+void nfs4_unhash_stid(struct nfs4_stid *s);
+void nfs4_put_stid(struct nfs4_stid *s);
+void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
+extern void nfs4_release_reclaim(struct nfsd_net *);
+extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
+ struct nfsd_net *nn);
+extern __be32 nfs4_check_open_reclaim(clientid_t *clid,
+ struct nfsd4_compound_state *cstate, struct nfsd_net *nn);
+extern int set_callback_cred(void);
+extern void nfsd4_probe_callback(struct nfs4_client *clp);
+extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
+extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
+extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
+ struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
+extern void nfsd4_run_cb(struct nfsd4_callback *cb);
+extern int nfsd4_create_callback_queue(void);
+extern void nfsd4_destroy_callback_queue(void);
+extern void nfsd4_shutdown_callback(struct nfs4_client *);
+extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
+extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
+ struct nfsd_net *nn);
+extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
+
+struct nfs4_file *find_file(struct knfsd_fh *fh);
+void put_nfs4_file(struct nfs4_file *fi);
+static inline void get_nfs4_file(struct nfs4_file *fi)
+{
+ atomic_inc(&fi->fi_ref);
+}
+struct file *find_any_file(struct nfs4_file *f);
+
+/* grace period management */
+void nfsd4_end_grace(struct nfsd_net *nn);
+
+/* nfs4recover operations */
+extern int nfsd4_client_tracking_init(struct net *net);
+extern void nfsd4_client_tracking_exit(struct net *net);
+extern void nfsd4_client_record_create(struct nfs4_client *clp);
+extern void nfsd4_client_record_remove(struct nfs4_client *clp);
+extern int nfsd4_client_record_check(struct nfs4_client *clp);
+extern void nfsd4_record_grace_done(struct nfsd_net *nn);
+
+/* nfs fault injection functions */
+#ifdef CONFIG_NFSD_FAULT_INJECTION
+int nfsd_fault_inject_init(void);
+void nfsd_fault_inject_cleanup(void);
+
+u64 nfsd_inject_print_clients(void);
+u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t);
+u64 nfsd_inject_forget_clients(u64);
+
+u64 nfsd_inject_print_locks(void);
+u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t);
+u64 nfsd_inject_forget_locks(u64);
+
+u64 nfsd_inject_print_openowners(void);
+u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t);
+u64 nfsd_inject_forget_openowners(u64);
+
+u64 nfsd_inject_print_delegations(void);
+u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t);
+u64 nfsd_inject_forget_delegations(u64);
+u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t);
+u64 nfsd_inject_recall_delegations(u64);
+#else /* CONFIG_NFSD_FAULT_INJECTION */
+static inline int nfsd_fault_inject_init(void) { return 0; }
+static inline void nfsd_fault_inject_cleanup(void) {}
+#endif /* CONFIG_NFSD_FAULT_INJECTION */
+
+#endif /* NFSD4_STATE_H */
Code Review / kvmfornfv.git / blobdiff