9ec7b004d0
support for NFSv4 as well as NFSv2 and 3. It lives in 3 subdirs under sys/fs: nfs - functions that are common to the client and server nfsclient - a mutation of sys/nfsclient that call generic functions to do RPCs and handle state. As such, it retains the buffer cache handling characteristics and vnode semantics that are found in sys/nfsclient, for the most part. nfsserver - the server. It includes a DRC designed specifically for NFSv4, that is used instead of the generic DRC in sys/rpc. The build glue will be checked in later, so at this point, it consists of 3 new subdirs that should not affect kernel building. Approved by: kib (mentor)
236 lines
8.1 KiB
C
236 lines
8.1 KiB
C
/*-
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* Copyright (c) 2009 Rick Macklem, University of Guelph
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* All rights reserved.
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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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* 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NFS_NFSRVSTATE_H_
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#define _NFS_NFSRVSTATE_H_
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/*
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* Definitions for NFS V4 server state handling.
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*/
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/*
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* List heads for nfsclient, nfsstate and nfslockfile.
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* (Some systems seem to like to dynamically size these things, but I
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* don't see any point in doing so for these ones.)
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*/
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LIST_HEAD(nfsclienthashhead, nfsclient);
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LIST_HEAD(nfsstatehead, nfsstate);
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LIST_HEAD(nfslockhead, nfslock);
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LIST_HEAD(nfslockhashhead, nfslockfile);
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/*
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* List head for nfsusrgrp.
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*/
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LIST_HEAD(nfsuserhashhead, nfsusrgrp);
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TAILQ_HEAD(nfsuserlruhead, nfsusrgrp);
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#define NFSCLIENTHASH(id) \
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(&nfsclienthash[(id).lval[1] % NFSCLIENTHASHSIZE])
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#define NFSSTATEHASH(clp, id) \
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(&((clp)->lc_stateid[(id).other[2] % NFSSTATEHASHSIZE]))
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#define NFSUSERHASH(id) \
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(&nfsuserhash[(id) % NFSUSERHASHSIZE])
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#define NFSUSERNAMEHASH(p, l) \
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(&nfsusernamehash[((l)>=4?(*(p)+*((p)+1)+*((p)+2)+*((p)+3)):*(p)) \
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% NFSUSERHASHSIZE])
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#define NFSGROUPHASH(id) \
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(&nfsgrouphash[(id) % NFSGROUPHASHSIZE])
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#define NFSGROUPNAMEHASH(p, l) \
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(&nfsgroupnamehash[((l)>=4?(*(p)+*((p)+1)+*((p)+2)+*((p)+3)):*(p)) \
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% NFSGROUPHASHSIZE])
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/*
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* Client server structure for V4. It is doubly linked into two lists.
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* The first is a hash table based on the clientid and the second is a
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* list of all clients maintained in LRU order.
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* The actual size malloc'd is large enough to accomodate the id string.
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*/
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struct nfsclient {
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LIST_ENTRY(nfsclient) lc_hash; /* Clientid hash list */
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struct nfsstatehead lc_stateid[NFSSTATEHASHSIZE]; /* stateid hash */
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struct nfsstatehead lc_open; /* Open owner list */
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struct nfsstatehead lc_deleg; /* Delegations */
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struct nfsstatehead lc_olddeleg; /* and old delegations */
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time_t lc_expiry; /* Expiry time (sec) */
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time_t lc_delegtime; /* Old deleg expiry (sec) */
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nfsquad_t lc_clientid; /* 64 bit clientid */
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nfsquad_t lc_confirm; /* 64 bit confirm value */
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u_int32_t lc_program; /* RPC Program # */
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u_int32_t lc_callback; /* Callback id */
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u_int32_t lc_stateindex; /* Current state index# */
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u_int32_t lc_statemaxindex; /* Max state index# */
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u_int32_t lc_cbref; /* Cnt of callbacks */
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uid_t lc_uid; /* User credential */
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gid_t lc_gid;
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u_int16_t lc_namelen;
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u_char *lc_name;
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struct nfssockreq lc_req; /* Callback info */
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u_short lc_idlen; /* Length of id string */
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u_int32_t lc_flags; /* LCL_ flag bits */
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u_char lc_verf[NFSX_VERF]; /* client verifier */
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u_char lc_id[1]; /* Malloc'd correct size */
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};
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#define CLOPS_CONFIRM 0x0001
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#define CLOPS_RENEW 0x0002
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#define CLOPS_RENEWOP 0x0004
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/*
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* Nfs state structure. I couldn't resist overloading this one, since
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* it makes cleanup, etc. simpler. These structures are used in four ways:
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* - open_owner structures chained off of nfsclient
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* - open file structures chained off an open_owner structure
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* - lock_owner structures chained off an open file structure
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* - delegated file structures chained off of nfsclient and nfslockfile
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* - the ls_list field is used for the chain it is in
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* - the ls_head structure is used to chain off the sibling structure
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* (it is a union between an nfsstate and nfslock structure head)
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* If it is a lockowner stateid, nfslock structures hang off it.
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* For the open file and lockowner cases, it is in the hash table in
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* nfsclient for stateid.
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*/
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struct nfsstate {
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LIST_ENTRY(nfsstate) ls_hash; /* Hash list entry */
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LIST_ENTRY(nfsstate) ls_list; /* List of opens/delegs */
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LIST_ENTRY(nfsstate) ls_file; /* Opens/Delegs for a file */
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union {
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struct nfsstatehead open; /* Opens list */
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struct nfslockhead lock; /* Locks list */
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} ls_head;
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nfsv4stateid_t ls_stateid; /* The state id */
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u_int32_t ls_seq; /* seq id */
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uid_t ls_uid; /* uid of locker */
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u_int32_t ls_flags; /* Type of lock, etc. */
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union {
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struct nfsstate *openowner; /* Open only */
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u_int32_t opentolockseq; /* Lock call only */
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u_int32_t noopens; /* Openowner only */
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struct {
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u_quad_t filerev; /* Delegations only */
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time_t expiry;
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time_t limit;
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u_int64_t compref;
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} deleg;
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} ls_un;
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struct nfslockfile *ls_lfp; /* Back pointer */
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struct nfsrvcache *ls_op; /* Op cache reference */
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struct nfsclient *ls_clp; /* Back pointer */
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u_short ls_ownerlen; /* Length of ls_owner */
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u_char ls_owner[1]; /* malloc'd the correct size */
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};
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#define ls_lock ls_head.lock
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#define ls_open ls_head.open
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#define ls_opentolockseq ls_un.opentolockseq
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#define ls_openowner ls_un.openowner
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#define ls_openstp ls_un.openowner
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#define ls_noopens ls_un.noopens
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#define ls_filerev ls_un.deleg.filerev
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#define ls_delegtime ls_un.deleg.expiry
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#define ls_delegtimelimit ls_un.deleg.limit
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#define ls_compref ls_un.deleg.compref
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/*
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* Nfs lock structure.
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* This structure is chained off of the nfsstate (the lockowner) and
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* nfslockfile (the file) structures, for the file and owner it
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* refers to. It holds flags and a byte range.
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* It also has back pointers to the associated lock_owner and lockfile.
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*/
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struct nfslock {
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LIST_ENTRY(nfslock) lo_lckowner;
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LIST_ENTRY(nfslock) lo_lckfile;
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struct nfsstate *lo_stp;
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struct nfslockfile *lo_lfp;
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u_int64_t lo_first;
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u_int64_t lo_end;
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u_int32_t lo_flags;
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};
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/*
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* Structure used to return a conflicting lock. (Must be large
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* enough for the largest lock owner we can have.)
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*/
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struct nfslockconflict {
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nfsquad_t cl_clientid;
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u_int64_t cl_first;
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u_int64_t cl_end;
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u_int32_t cl_flags;
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u_short cl_ownerlen;
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u_char cl_owner[NFSV4_OPAQUELIMIT];
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};
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/*
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* This structure refers to a file for which lock(s) and/or open(s) exist.
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* Searched via hash table on file handle or found via the back pointer from an
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* open or lock owner.
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*/
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struct nfslockfile {
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LIST_HEAD(, nfsstate) lf_open; /* Open list */
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LIST_HEAD(, nfsstate) lf_deleg; /* Delegation list */
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LIST_HEAD(, nfslock) lf_lock; /* Lock list */
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LIST_ENTRY(nfslockfile) lf_hash; /* Hash list entry */
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fhandle_t lf_fh; /* The file handle */
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};
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/*
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* This structure is malloc'd an chained off hash lists for user/group
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* names.
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*/
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struct nfsusrgrp {
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TAILQ_ENTRY(nfsusrgrp) lug_lru; /* LRU list */
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LIST_ENTRY(nfsusrgrp) lug_numhash; /* Hash by id# */
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LIST_ENTRY(nfsusrgrp) lug_namehash; /* and by name */
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time_t lug_expiry; /* Expiry time in sec */
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union {
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uid_t un_uid; /* id# */
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gid_t un_gid;
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} lug_un;
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int lug_namelen; /* Name length */
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u_char lug_name[1]; /* malloc'd correct length */
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};
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#define lug_uid lug_un.un_uid
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#define lug_gid lug_un.un_gid
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/*
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* These structures are used for the stable storage restart stuff.
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*/
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/*
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* Record at beginning of file.
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*/
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struct nfsf_rec {
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u_int32_t lease; /* Lease duration */
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u_int32_t numboots; /* Number of boottimes */
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};
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#if defined(_KERNEL) || defined(KERNEL)
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void nfsrv_cleanclient(struct nfsclient *, NFSPROC_T *);
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void nfsrv_freedeleglist(struct nfsstatehead *);
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#endif
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#endif /* _NFS_NFSRVSTATE_H_ */
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