7ea710b3b1
when an NFSv4 server reboots, by doing two things.
1 - Make the function that acquires a stateid for I/O operations
block until recovery is complete, so that it doesn't acquire
out of date stateids.
2 - Only allow a recovery once every 1/2 of a lease duration, since
the NFSv4 server must provide a recovery grace period of at
least a lease duration. This should avoid recoveries caused
by an out of date stateid that was acquired for an I/O op.
just before a recovery cycle started.
MFC after: 1 week
178 lines
5.4 KiB
C
178 lines
5.4 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_NFSCLSTATE_H_
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#define _NFS_NFSCLSTATE_H_
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/*
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* Definitions for NFS V4 client state handling.
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*/
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LIST_HEAD(nfsclopenhead, nfsclopen);
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LIST_HEAD(nfscllockownerhead, nfscllockowner);
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LIST_HEAD(nfscllockhead, nfscllock);
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LIST_HEAD(nfsclhead, nfsclclient);
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LIST_HEAD(nfsclownerhead, nfsclowner);
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TAILQ_HEAD(nfscldeleghead, nfscldeleg);
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LIST_HEAD(nfscldeleghash, nfscldeleg);
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#define NFSCLDELEGHASHSIZE 256
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#define NFSCLDELEGHASH(c, f, l) \
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(&((c)->nfsc_deleghash[ncl_hash((f), (l)) % NFSCLDELEGHASHSIZE]))
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struct nfsclclient {
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LIST_ENTRY(nfsclclient) nfsc_list;
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struct nfsclownerhead nfsc_owner;
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struct nfscldeleghead nfsc_deleg;
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struct nfscldeleghash nfsc_deleghash[NFSCLDELEGHASHSIZE];
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struct nfscllockownerhead nfsc_defunctlockowner;
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struct nfsv4lock nfsc_lock;
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struct proc *nfsc_renewthread;
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struct nfsmount *nfsc_nmp;
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nfsquad_t nfsc_clientid;
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time_t nfsc_expire;
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u_int32_t nfsc_clientidrev;
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u_int32_t nfsc_renew;
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u_int32_t nfsc_cbident;
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u_int16_t nfsc_flags;
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u_int16_t nfsc_idlen;
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u_int8_t nfsc_id[1]; /* Malloc'd to correct length */
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};
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/*
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* Bits for nfsc_flags.
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*/
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#define NFSCLFLAGS_INITED 0x0001
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#define NFSCLFLAGS_HASCLIENTID 0x0002
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#define NFSCLFLAGS_RECOVER 0x0004
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#define NFSCLFLAGS_UMOUNT 0x0008
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#define NFSCLFLAGS_HASTHREAD 0x0010
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#define NFSCLFLAGS_AFINET6 0x0020
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#define NFSCLFLAGS_EXPIREIT 0x0040
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#define NFSCLFLAGS_FIRSTDELEG 0x0080
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#define NFSCLFLAGS_GOTDELEG 0x0100
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#define NFSCLFLAGS_RECVRINPROG 0x0200
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struct nfsclowner {
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LIST_ENTRY(nfsclowner) nfsow_list;
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struct nfsclopenhead nfsow_open;
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struct nfsclclient *nfsow_clp;
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u_int32_t nfsow_seqid;
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u_int32_t nfsow_defunct;
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struct nfsv4lock nfsow_rwlock;
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u_int8_t nfsow_owner[NFSV4CL_LOCKNAMELEN];
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};
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/*
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* MALLOC'd to the correct length to accommodate the file handle.
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*/
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struct nfscldeleg {
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TAILQ_ENTRY(nfscldeleg) nfsdl_list;
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LIST_ENTRY(nfscldeleg) nfsdl_hash;
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struct nfsclownerhead nfsdl_owner; /* locally issued state */
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struct nfscllockownerhead nfsdl_lock;
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nfsv4stateid_t nfsdl_stateid;
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struct acl_entry nfsdl_ace; /* Delegation ace */
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struct nfsclclient *nfsdl_clp;
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struct nfsv4lock nfsdl_rwlock; /* for active I/O ops */
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struct nfscred nfsdl_cred; /* Cred. used for Open */
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time_t nfsdl_timestamp; /* used for stale cleanup */
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u_int64_t nfsdl_sizelimit; /* Limit for file growth */
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u_int64_t nfsdl_size; /* saved copy of file size */
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u_int64_t nfsdl_change; /* and change attribute */
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struct timespec nfsdl_modtime; /* local modify time */
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u_int16_t nfsdl_fhlen;
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u_int8_t nfsdl_flags;
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u_int8_t nfsdl_fh[1]; /* must be last */
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};
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/*
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* nfsdl_flags bits.
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*/
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#define NFSCLDL_READ 0x01
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#define NFSCLDL_WRITE 0x02
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#define NFSCLDL_RECALL 0x04
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#define NFSCLDL_NEEDRECLAIM 0x08
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#define NFSCLDL_ZAPPED 0x10
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#define NFSCLDL_MODTIMESET 0x20
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/*
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* MALLOC'd to the correct length to accommodate the file handle.
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*/
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struct nfsclopen {
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LIST_ENTRY(nfsclopen) nfso_list;
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struct nfscllockownerhead nfso_lock;
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nfsv4stateid_t nfso_stateid;
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struct nfsclowner *nfso_own;
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struct nfscred nfso_cred; /* Cred. used for Open */
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u_int32_t nfso_mode;
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u_int32_t nfso_opencnt;
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u_int16_t nfso_fhlen;
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u_int8_t nfso_posixlock; /* 1 for POSIX type locking */
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u_int8_t nfso_fh[1]; /* must be last */
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};
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/*
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* Return values for nfscl_open(). NFSCLOPEN_OK must == 0.
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*/
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#define NFSCLOPEN_OK 0
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#define NFSCLOPEN_DOOPEN 1
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#define NFSCLOPEN_DOOPENDOWNGRADE 2
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#define NFSCLOPEN_SETCRED 3
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struct nfscllockowner {
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LIST_ENTRY(nfscllockowner) nfsl_list;
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struct nfscllockhead nfsl_lock;
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struct nfsclopen *nfsl_open;
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NFSPROC_T *nfsl_inprog;
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nfsv4stateid_t nfsl_stateid;
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u_int32_t nfsl_seqid;
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u_int32_t nfsl_defunct;
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struct nfsv4lock nfsl_rwlock;
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u_int8_t nfsl_owner[NFSV4CL_LOCKNAMELEN];
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u_int8_t nfsl_openowner[NFSV4CL_LOCKNAMELEN];
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};
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/*
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* Byte range entry for the above lock owner.
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*/
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struct nfscllock {
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LIST_ENTRY(nfscllock) nfslo_list;
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u_int64_t nfslo_first;
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u_int64_t nfslo_end;
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short nfslo_type;
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};
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/*
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* Macro for incrementing the seqid#.
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*/
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#define NFSCL_INCRSEQID(s, n) do { \
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if (((n)->nd_flag & ND_INCRSEQID)) \
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(s)++; \
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} while (0)
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#endif /* _NFS_NFSCLSTATE_H_ */
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