[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/nfsd/state.h b/ap/os/linux/linux-3.4.x/fs/nfsd/state.h
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index 0000000..89ab137
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+/*
+ * 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 <linux/nfsd/nfsfh.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 {
+ void *cb_op;
+ struct nfs4_client *cb_clp;
+ struct list_head cb_per_client;
+ u32 cb_minorversion;
+ struct rpc_message cb_msg;
+ const struct rpc_call_ops *cb_ops;
+ struct work_struct cb_work;
+ bool cb_done;
+};
+
+struct nfs4_stid {
+#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
+ unsigned char sc_type;
+ stateid_t sc_stateid;
+ struct nfs4_client *sc_client;
+};
+
+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 */
+ atomic_t dl_count; /* ref count */
+ struct nfs4_file *dl_file;
+ u32 dl_type;
+ time_t dl_time;
+/* For recall: */
+ struct knfsd_fh dl_fh;
+ int dl_retries;
+ struct nfsd4_callback 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 1024
+/* 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_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;
+ u32 uid;
+ u32 gid;
+};
+
+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;
+};
+
+struct nfsd4_session {
+ struct kref se_ref;
+ struct list_head se_hash; /* hash by sessionid */
+ struct list_head se_perclnt;
+ 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 list_head se_conns;
+ u32 se_cb_prog;
+ u32 se_cb_seq_nr;
+ struct nfsd4_slot *se_slots[]; /* forward channel slots */
+};
+
+extern void nfsd4_put_session(struct nfsd4_session *ses);
+
+/* 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.
+ * 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 list_head cl_strhash; /* hash by cl_name */
+ struct list_head cl_openowners;
+ struct idr cl_stateids; /* stateid lookup */
+ struct list_head cl_delegations;
+ struct list_head cl_lru; /* tail queue */
+ struct xdr_netobj cl_name; /* id generated by client */
+ char cl_recdir[HEXDIR_LEN]; /* recovery dir */
+ nfs4_verifier cl_verifier; /* generated by client */
+ time_t cl_time; /* time of last lease renewal */
+ struct sockaddr_storage cl_addr; /* client ipaddress */
+ u32 cl_flavor; /* setclientid pseudoflavor */
+ char *cl_principal; /* setclientid principal name */
+ 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_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
+ 1 << NFSD4_CLIENT_CB_KILL)
+ unsigned long cl_flags;
+ 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;
+ struct list_head cl_callbacks; /* list of in-progress callbacks */
+
+ /* 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 */
+};
+
+static inline void
+mark_client_expired(struct nfs4_client *clp)
+{
+ clp->cl_time = 0;
+}
+
+static inline bool
+is_client_expired(struct nfs4_client *clp)
+{
+ return clp->cl_time == 0;
+}
+
+/* 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 */
+ 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;
+ char rp_ibuf[NFSD4_REPLAY_ISIZE];
+};
+
+struct nfs4_stateowner {
+ struct list_head so_strhash; /* hash by op_name */
+ struct list_head so_stateids;
+ struct nfs4_client * so_client;
+ /* after increment in ENCODE_SEQID_OP_TAIL, represents the next
+ * sequence id expected from the client: */
+ u32 so_seqid;
+ struct xdr_netobj so_owner; /* open owner name */
+ struct nfs4_replay so_replay;
+ bool so_is_open_owner;
+};
+
+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
+#define NFS4_OO_PURGE_CLOSE 2
+#define NFS4_OO_NEW 4
+ unsigned char oo_flags;
+};
+
+struct nfs4_lockowner {
+ struct nfs4_stateowner lo_owner; /* must be first element */
+ struct list_head lo_owner_ino_hash; /* hash by owner,file */
+ struct list_head lo_perstateid; /* for lockowners only */
+ struct list_head lo_list; /* for temporary uses */
+};
+
+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);
+}
+
+/*
+* nfs4_file: a file opened by some number of (open) nfs4_stateowners.
+* o fi_perfile list is used to search for conflicting
+* share_acces, share_deny on the file.
+*/
+struct nfs4_file {
+ atomic_t fi_ref;
+ struct list_head fi_hash; /* hash by "struct inode *" */
+ struct list_head fi_stateids;
+ struct list_head fi_delegations;
+ /* 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];
+ struct file *fi_deleg_file;
+ struct file_lock *fi_lease;
+ atomic_t fi_delegees;
+ struct inode *fi_inode;
+ bool fi_had_conflict;
+};
+
+/* XXX: for first cut may fall back on returning file that doesn't work
+ * at all? */
+static inline struct file *find_writeable_file(struct nfs4_file *f)
+{
+ if (f->fi_fds[O_WRONLY])
+ return f->fi_fds[O_WRONLY];
+ return f->fi_fds[O_RDWR];
+}
+
+static inline struct file *find_readable_file(struct nfs4_file *f)
+{
+ if (f->fi_fds[O_RDONLY])
+ return f->fi_fds[O_RDONLY];
+ return f->fi_fds[O_RDWR];
+}
+
+static inline struct file *find_any_file(struct nfs4_file *f)
+{
+ if (f->fi_fds[O_RDWR])
+ return f->fi_fds[O_RDWR];
+ else if (f->fi_fds[O_WRONLY])
+ return f->fi_fds[O_WRONLY];
+ else
+ return f->fi_fds[O_RDONLY];
+}
+
+/* "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_lockowners;
+ struct nfs4_stateowner * st_stateowner;
+ struct nfs4_file * st_file;
+ unsigned long st_access_bmap;
+ unsigned long 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);
+}
+
+/* flags for preprocess_seqid_op() */
+#define RD_STATE 0x00000010
+#define WR_STATE 0x00000020
+
+struct nfsd4_compound_state;
+
+extern __be32 nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
+ stateid_t *stateid, int flags, struct file **filp);
+extern void nfs4_lock_state(void);
+extern void nfs4_unlock_state(void);
+extern int nfs4_in_grace(void);
+extern void nfs4_release_reclaim(void);
+extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct nfs4_client *crp);
+extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
+extern void nfs4_free_openowner(struct nfs4_openowner *);
+extern void nfs4_free_lockowner(struct nfs4_lockowner *);
+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_do_callback_rpc(struct work_struct *);
+extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
+extern int nfsd4_create_callback_queue(void);
+extern void nfsd4_destroy_callback_queue(void);
+extern void nfsd4_shutdown_callback(struct nfs4_client *);
+extern void nfs4_put_delegation(struct nfs4_delegation *dp);
+extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
+extern int nfs4_client_to_reclaim(const char *name);
+extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
+extern void release_session_client(struct nfsd4_session *);
+extern __be32 nfs4_validate_stateid(struct nfs4_client *, stateid_t *);
+extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);
+
+/* 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 net *net, time_t boot_time);
+#endif /* NFSD4_STATE_H */