forked from Minki/linux
b3c32bcd9c
Just like open-owners, lock-owners are associated with a name, a clientid and, in the case of minor version 0, a sequence id. There is no association to a file. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
509 lines
16 KiB
C
509 lines
16 KiB
C
/*
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* Copyright (c) 2001 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Kendrick Smith <kmsmith@umich.edu>
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* Andy Adamson <andros@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#ifndef _NFSD4_STATE_H
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#define _NFSD4_STATE_H
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#include <linux/idr.h>
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#include <linux/sunrpc/svc_xprt.h>
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#include "nfsfh.h"
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typedef struct {
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u32 cl_boot;
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u32 cl_id;
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} clientid_t;
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typedef struct {
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clientid_t so_clid;
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u32 so_id;
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} stateid_opaque_t;
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typedef struct {
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u32 si_generation;
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stateid_opaque_t si_opaque;
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} stateid_t;
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#define STATEID_FMT "(%08x/%08x/%08x/%08x)"
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#define STATEID_VAL(s) \
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(s)->si_opaque.so_clid.cl_boot, \
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(s)->si_opaque.so_clid.cl_id, \
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(s)->si_opaque.so_id, \
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(s)->si_generation
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struct nfsd4_callback {
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void *cb_op;
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struct nfs4_client *cb_clp;
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struct list_head cb_per_client;
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u32 cb_minorversion;
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struct rpc_message cb_msg;
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const struct rpc_call_ops *cb_ops;
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struct work_struct cb_work;
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bool cb_done;
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};
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struct nfs4_stid {
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#define NFS4_OPEN_STID 1
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#define NFS4_LOCK_STID 2
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#define NFS4_DELEG_STID 4
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/* For an open stateid kept around *only* to process close replays: */
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#define NFS4_CLOSED_STID 8
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/* For a deleg stateid kept around only to process free_stateid's: */
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#define NFS4_REVOKED_DELEG_STID 16
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unsigned char sc_type;
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stateid_t sc_stateid;
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struct nfs4_client *sc_client;
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};
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struct nfs4_delegation {
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struct nfs4_stid dl_stid; /* must be first field */
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struct list_head dl_perfile;
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struct list_head dl_perclnt;
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struct list_head dl_recall_lru; /* delegation recalled */
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atomic_t dl_count; /* ref count */
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struct nfs4_file *dl_file;
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u32 dl_type;
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time_t dl_time;
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/* For recall: */
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struct knfsd_fh dl_fh;
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int dl_retries;
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struct nfsd4_callback dl_recall;
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};
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/* client delegation callback info */
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struct nfs4_cb_conn {
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/* SETCLIENTID info */
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struct sockaddr_storage cb_addr;
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struct sockaddr_storage cb_saddr;
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size_t cb_addrlen;
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u32 cb_prog; /* used only in 4.0 case;
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per-session otherwise */
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u32 cb_ident; /* minorversion 0 only */
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struct svc_xprt *cb_xprt; /* minorversion 1 only */
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};
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static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
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{
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return container_of(s, struct nfs4_delegation, dl_stid);
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}
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/* Maximum number of slots per session. 160 is useful for long haul TCP */
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#define NFSD_MAX_SLOTS_PER_SESSION 160
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/* Maximum number of operations per session compound */
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#define NFSD_MAX_OPS_PER_COMPOUND 16
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/* Maximum session per slot cache size */
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#define NFSD_SLOT_CACHE_SIZE 2048
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/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
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#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
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#define NFSD_MAX_MEM_PER_SESSION \
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(NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
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struct nfsd4_slot {
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u32 sl_seqid;
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__be32 sl_status;
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u32 sl_datalen;
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u16 sl_opcnt;
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#define NFSD4_SLOT_INUSE (1 << 0)
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#define NFSD4_SLOT_CACHETHIS (1 << 1)
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#define NFSD4_SLOT_INITIALIZED (1 << 2)
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u8 sl_flags;
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char sl_data[];
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};
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struct nfsd4_channel_attrs {
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u32 headerpadsz;
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u32 maxreq_sz;
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u32 maxresp_sz;
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u32 maxresp_cached;
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u32 maxops;
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u32 maxreqs;
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u32 nr_rdma_attrs;
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u32 rdma_attrs;
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};
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struct nfsd4_cb_sec {
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u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
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kuid_t uid;
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kgid_t gid;
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};
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struct nfsd4_create_session {
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clientid_t clientid;
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struct nfs4_sessionid sessionid;
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u32 seqid;
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u32 flags;
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struct nfsd4_channel_attrs fore_channel;
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struct nfsd4_channel_attrs back_channel;
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u32 callback_prog;
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struct nfsd4_cb_sec cb_sec;
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};
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struct nfsd4_backchannel_ctl {
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u32 bc_cb_program;
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struct nfsd4_cb_sec bc_cb_sec;
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};
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struct nfsd4_bind_conn_to_session {
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struct nfs4_sessionid sessionid;
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u32 dir;
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};
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/* The single slot clientid cache structure */
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struct nfsd4_clid_slot {
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u32 sl_seqid;
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__be32 sl_status;
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struct nfsd4_create_session sl_cr_ses;
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};
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struct nfsd4_conn {
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struct list_head cn_persession;
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struct svc_xprt *cn_xprt;
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struct svc_xpt_user cn_xpt_user;
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struct nfsd4_session *cn_session;
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/* CDFC4_FORE, CDFC4_BACK: */
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unsigned char cn_flags;
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};
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struct nfsd4_session {
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atomic_t se_ref;
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struct list_head se_hash; /* hash by sessionid */
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struct list_head se_perclnt;
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/* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
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#define NFS4_SESSION_DEAD 0x010
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u32 se_flags;
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struct nfs4_client *se_client;
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struct nfs4_sessionid se_sessionid;
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struct nfsd4_channel_attrs se_fchannel;
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struct nfsd4_channel_attrs se_bchannel;
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struct nfsd4_cb_sec se_cb_sec;
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struct list_head se_conns;
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u32 se_cb_prog;
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u32 se_cb_seq_nr;
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struct nfsd4_slot *se_slots[]; /* forward channel slots */
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};
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extern void nfsd4_put_session(struct nfsd4_session *ses);
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/* formatted contents of nfs4_sessionid */
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struct nfsd4_sessionid {
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clientid_t clientid;
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u32 sequence;
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u32 reserved;
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};
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#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
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/*
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* struct nfs4_client - one per client. Clientids live here.
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* o Each nfs4_client is hashed by clientid.
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*
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* o Each nfs4_clients is also hashed by name
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* (the opaque quantity initially sent by the client to identify itself).
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*
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* o cl_perclient list is used to ensure no dangling stateowner references
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* when we expire the nfs4_client
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*/
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struct nfs4_client {
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struct list_head cl_idhash; /* hash by cl_clientid.id */
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struct rb_node cl_namenode; /* link into by-name trees */
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struct list_head cl_openowners;
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struct idr cl_stateids; /* stateid lookup */
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struct list_head cl_delegations;
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struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
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struct list_head cl_lru; /* tail queue */
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struct xdr_netobj cl_name; /* id generated by client */
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nfs4_verifier cl_verifier; /* generated by client */
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time_t cl_time; /* time of last lease renewal */
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struct sockaddr_storage cl_addr; /* client ipaddress */
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bool cl_mach_cred; /* SP4_MACH_CRED in force */
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struct svc_cred cl_cred; /* setclientid principal */
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clientid_t cl_clientid; /* generated by server */
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nfs4_verifier cl_confirm; /* generated by server */
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u32 cl_minorversion;
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/* for v4.0 and v4.1 callbacks: */
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struct nfs4_cb_conn cl_cb_conn;
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#define NFSD4_CLIENT_CB_UPDATE (0)
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#define NFSD4_CLIENT_CB_KILL (1)
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#define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
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#define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
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#define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
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#define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
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1 << NFSD4_CLIENT_CB_KILL)
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unsigned long cl_flags;
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struct rpc_cred *cl_cb_cred;
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struct rpc_clnt *cl_cb_client;
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u32 cl_cb_ident;
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#define NFSD4_CB_UP 0
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#define NFSD4_CB_UNKNOWN 1
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#define NFSD4_CB_DOWN 2
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#define NFSD4_CB_FAULT 3
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int cl_cb_state;
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struct nfsd4_callback cl_cb_null;
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struct nfsd4_session *cl_cb_session;
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struct list_head cl_callbacks; /* list of in-progress callbacks */
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/* for all client information that callback code might need: */
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spinlock_t cl_lock;
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/* for nfs41 */
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struct list_head cl_sessions;
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struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
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u32 cl_exchange_flags;
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/* number of rpc's in progress over an associated session: */
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atomic_t cl_refcount;
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/* for nfs41 callbacks */
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/* We currently support a single back channel with a single slot */
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unsigned long cl_cb_slot_busy;
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struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
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/* wait here for slots */
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struct net *net;
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};
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/* struct nfs4_client_reset
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* one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
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* upon lease reset, or from upcall to state_daemon (to read in state
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* from non-volitile storage) upon reboot.
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*/
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struct nfs4_client_reclaim {
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struct list_head cr_strhash; /* hash by cr_name */
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struct nfs4_client *cr_clp; /* pointer to associated clp */
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char cr_recdir[HEXDIR_LEN]; /* recover dir */
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};
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static inline void
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update_stateid(stateid_t *stateid)
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{
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stateid->si_generation++;
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/* Wraparound recommendation from 3530bis-13 9.1.3.2: */
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if (stateid->si_generation == 0)
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stateid->si_generation = 1;
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}
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/* A reasonable value for REPLAY_ISIZE was estimated as follows:
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* The OPEN response, typically the largest, requires
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* 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
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* 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
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* 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
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*/
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#define NFSD4_REPLAY_ISIZE 112
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/*
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* Replay buffer, where the result of the last seqid-mutating operation
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* is cached.
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*/
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struct nfs4_replay {
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__be32 rp_status;
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unsigned int rp_buflen;
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char *rp_buf;
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struct knfsd_fh rp_openfh;
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char rp_ibuf[NFSD4_REPLAY_ISIZE];
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};
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struct nfs4_stateowner {
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struct list_head so_strhash; /* hash by op_name */
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struct list_head so_stateids;
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struct nfs4_client * so_client;
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/* after increment in ENCODE_SEQID_OP_TAIL, represents the next
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* sequence id expected from the client: */
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u32 so_seqid;
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struct xdr_netobj so_owner; /* open owner name */
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struct nfs4_replay so_replay;
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bool so_is_open_owner;
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};
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struct nfs4_openowner {
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struct nfs4_stateowner oo_owner; /* must be first field */
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struct list_head oo_perclient;
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/*
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* We keep around openowners a little while after last close,
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* which saves clients from having to confirm, and allows us to
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* handle close replays if they come soon enough. The close_lru
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* is a list of such openowners, to be reaped by the laundromat
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* thread eventually if they remain unused:
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*/
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struct list_head oo_close_lru;
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struct nfs4_ol_stateid *oo_last_closed_stid;
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time_t oo_time; /* time of placement on so_close_lru */
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#define NFS4_OO_CONFIRMED 1
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#define NFS4_OO_NEW 4
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unsigned char oo_flags;
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};
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struct nfs4_lockowner {
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struct nfs4_stateowner lo_owner; /* must be first element */
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struct list_head lo_list; /* for temporary uses */
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};
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static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
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{
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return container_of(so, struct nfs4_openowner, oo_owner);
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}
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static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
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{
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return container_of(so, struct nfs4_lockowner, lo_owner);
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}
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/* nfs4_file: a file opened by some number of (open) nfs4_stateowners. */
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struct nfs4_file {
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atomic_t fi_ref;
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struct hlist_node fi_hash; /* hash by "struct inode *" */
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struct list_head fi_stateids;
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struct list_head fi_delegations;
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/* One each for O_RDONLY, O_WRONLY, O_RDWR: */
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struct file * fi_fds[3];
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/*
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* Each open or lock stateid contributes 0-4 to the counts
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* below depending on which bits are set in st_access_bitmap:
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* 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
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* + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
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* + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
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*/
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atomic_t fi_access[2];
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struct file *fi_deleg_file;
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struct file_lock *fi_lease;
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atomic_t fi_delegees;
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struct inode *fi_inode;
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bool fi_had_conflict;
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};
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/* XXX: for first cut may fall back on returning file that doesn't work
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* at all? */
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static inline struct file *find_writeable_file(struct nfs4_file *f)
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{
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if (f->fi_fds[O_WRONLY])
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return f->fi_fds[O_WRONLY];
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return f->fi_fds[O_RDWR];
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}
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static inline struct file *find_readable_file(struct nfs4_file *f)
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{
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if (f->fi_fds[O_RDONLY])
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return f->fi_fds[O_RDONLY];
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return f->fi_fds[O_RDWR];
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}
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static inline struct file *find_any_file(struct nfs4_file *f)
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{
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if (f->fi_fds[O_RDWR])
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return f->fi_fds[O_RDWR];
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else if (f->fi_fds[O_WRONLY])
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return f->fi_fds[O_WRONLY];
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else
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return f->fi_fds[O_RDONLY];
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}
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/* "ol" stands for "Open or Lock". Better suggestions welcome. */
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struct nfs4_ol_stateid {
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struct nfs4_stid st_stid; /* must be first field */
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struct list_head st_perfile;
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struct list_head st_perstateowner;
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struct list_head st_locks;
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struct nfs4_stateowner * st_stateowner;
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struct nfs4_file * st_file;
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unsigned long st_access_bmap;
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unsigned long st_deny_bmap;
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struct nfs4_ol_stateid * st_openstp;
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};
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static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
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{
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return container_of(s, struct nfs4_ol_stateid, st_stid);
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}
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/* flags for preprocess_seqid_op() */
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#define RD_STATE 0x00000010
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#define WR_STATE 0x00000020
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struct nfsd4_compound_state;
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struct nfsd_net;
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extern __be32 nfs4_preprocess_stateid_op(struct net *net,
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struct nfsd4_compound_state *cstate,
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stateid_t *stateid, int flags, struct file **filp);
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extern void nfs4_lock_state(void);
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extern void nfs4_unlock_state(void);
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void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
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extern void nfs4_release_reclaim(struct nfsd_net *);
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extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
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struct nfsd_net *nn);
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extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn);
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extern int set_callback_cred(void);
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extern void nfsd4_init_callback(struct nfsd4_callback *);
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extern void nfsd4_probe_callback(struct nfs4_client *clp);
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extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
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extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
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extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
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extern int nfsd4_create_callback_queue(void);
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extern void nfsd4_destroy_callback_queue(void);
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extern void nfsd4_shutdown_callback(struct nfs4_client *);
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extern void nfs4_put_delegation(struct nfs4_delegation *dp);
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extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
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struct nfsd_net *nn);
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extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
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/* nfs4recover operations */
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extern int nfsd4_client_tracking_init(struct net *net);
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extern void nfsd4_client_tracking_exit(struct net *net);
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extern void nfsd4_client_record_create(struct nfs4_client *clp);
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extern void nfsd4_client_record_remove(struct nfs4_client *clp);
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extern int nfsd4_client_record_check(struct nfs4_client *clp);
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extern void nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time);
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/* nfs fault injection functions */
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#ifdef CONFIG_NFSD_FAULT_INJECTION
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int nfsd_fault_inject_init(void);
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void nfsd_fault_inject_cleanup(void);
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u64 nfsd_for_n_state(u64, u64 (*)(struct nfs4_client *, u64));
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struct nfs4_client *nfsd_find_client(struct sockaddr_storage *, size_t);
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u64 nfsd_forget_client(struct nfs4_client *, u64);
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u64 nfsd_forget_client_locks(struct nfs4_client*, u64);
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u64 nfsd_forget_client_openowners(struct nfs4_client *, u64);
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u64 nfsd_forget_client_delegations(struct nfs4_client *, u64);
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u64 nfsd_recall_client_delegations(struct nfs4_client *, u64);
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u64 nfsd_print_client(struct nfs4_client *, u64);
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u64 nfsd_print_client_locks(struct nfs4_client *, u64);
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u64 nfsd_print_client_openowners(struct nfs4_client *, u64);
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u64 nfsd_print_client_delegations(struct nfs4_client *, u64);
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#else /* CONFIG_NFSD_FAULT_INJECTION */
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static inline int nfsd_fault_inject_init(void) { return 0; }
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static inline void nfsd_fault_inject_cleanup(void) {}
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#endif /* CONFIG_NFSD_FAULT_INJECTION */
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#endif /* NFSD4_STATE_H */
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