56e9ce41a5
nfs_readlink() calls nfs_bioread() which passes in uio_td as the thread argument to nfs_getcacheblk(). In nfs_getcacheblk() we dereference the thread pointer to get a process pointer to pass to nfs_sigintr(). This obviously results in a panic. :) Rather than change nfs_getcacheblk() to check if the thread pointer is NULL when calling nfs_sigintr() like other callers do, change nfs_sigintr() to take a thread as the last argument instead of a process so none of the callers have to care if the thread is NULL or not.
297 lines
9.9 KiB
C
297 lines
9.9 KiB
C
/*
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* Copyright (c) 1989, 1993, 1995
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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* @(#)nfs.h 8.4 (Berkeley) 5/1/95
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* $FreeBSD$
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*/
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#ifndef _NFSCLIENT_NFS_H_
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#define _NFSCLIENT_NFS_H_
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#ifdef _KERNEL
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#include "opt_nfs.h"
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#endif
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#include <nfsclient/nfsargs.h>
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/*
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* Tunable constants for nfs
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*/
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#define NFS_TICKINTVL 5 /* Desired time for a tick (msec) */
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#define NFS_HZ (hz / nfs_ticks) /* Ticks/sec */
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#define NFS_TIMEO (1 * NFS_HZ) /* Default timeout = 1 second */
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#define NFS_MINTIMEO (1 * NFS_HZ) /* Min timeout to use */
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#define NFS_MAXTIMEO (60 * NFS_HZ) /* Max timeout to backoff to */
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#define NFS_MINIDEMTIMEO (5 * NFS_HZ) /* Min timeout for non-idempotent ops*/
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#define NFS_MAXREXMIT 100 /* Stop counting after this many */
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#define NFS_RETRANS 10 /* Num of retrans for soft mounts */
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#define NFS_MAXGRPS 16 /* Max. size of groups list */
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#ifndef NFS_MINATTRTIMO
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#define NFS_MINATTRTIMO 3 /* VREG attrib cache timeout in sec */
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#endif
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#ifndef NFS_MAXATTRTIMO
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#define NFS_MAXATTRTIMO 60
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#endif
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#ifndef NFS_MINDIRATTRTIMO
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#define NFS_MINDIRATTRTIMO 30 /* VDIR attrib cache timeout in sec */
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#endif
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#ifndef NFS_MAXDIRATTRTIMO
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#define NFS_MAXDIRATTRTIMO 60
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#endif
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#define NFS_WSIZE 8192 /* Def. write data size <= 8192 */
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#define NFS_RSIZE 8192 /* Def. read data size <= 8192 */
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#define NFS_READDIRSIZE 8192 /* Def. readdir size */
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#define NFS_DEFRAHEAD 1 /* Def. read ahead # blocks */
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#define NFS_MAXRAHEAD 4 /* Max. read ahead # blocks */
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#define NFS_MAXASYNCDAEMON 64 /* Max. number async_daemons runnable */
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#define NFS_DIRBLKSIZ 4096 /* Must be a multiple of DIRBLKSIZ */
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#ifdef _KERNEL
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#define DIRBLKSIZ 512 /* XXX we used to use ufs's DIRBLKSIZ */
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#endif
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#define NFS_MAXDEADTHRESH 9 /* How long till we say 'server not responding' */
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/*
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* Oddballs
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*/
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#define NFS_CMPFH(n, f, s) \
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((n)->n_fhsize == (s) && !bcmp((caddr_t)(n)->n_fhp, (caddr_t)(f), (s)))
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#define NFS_ISV3(v) (VFSTONFS((v)->v_mount)->nm_flag & NFSMNT_NFSV3)
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#define NFSSTA_HASWRITEVERF 0x00040000 /* Has write verifier for V3 */
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#define NFSSTA_GOTFSINFO 0x00100000 /* Got the V3 fsinfo */
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#define NFSSTA_SNDLOCK 0x01000000 /* Send socket lock */
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#define NFSSTA_WANTSND 0x02000000 /* Want above */
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#define NFSSTA_RCVLOCK 0x04000000 /* Rcv socket lock */
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#define NFSSTA_WANTRCV 0x08000000 /* Want above */
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/*
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* XXX to allow amd to include nfs.h without nfsproto.h
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*/
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#ifdef NFS_NPROCS
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#include <nfsclient/nfsstats.h>
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#endif
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/*
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* Flags for nfsclnt() system call.
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*/
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#define NFSCLNT_LOCKDANS 0x200
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/*
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* vfs.nfs sysctl(3) identifiers
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*/
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#define NFS_NFSSTATS 1 /* struct: struct nfsstats */
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#ifdef _KERNEL
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_NFSREQ);
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MALLOC_DECLARE(M_NFSDIROFF);
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MALLOC_DECLARE(M_NFSBIGFH);
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MALLOC_DECLARE(M_NFSHASH);
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#endif
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extern uma_zone_t nfsmount_zone;
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extern struct callout_handle nfs_timer_handle;
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extern struct nfsstats nfsstats;
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extern int nfs_numasync;
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extern int nfs_pbuf_freecnt;
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extern int nfs_ticks;
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/* Data constants in XDR form */
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extern u_int32_t nfs_true, nfs_false, nfs_xdrneg1;
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extern u_int32_t rpc_reply, rpc_msgdenied, rpc_mismatch, rpc_vers;
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extern u_int32_t rpc_auth_unix, rpc_msgaccepted, rpc_call, rpc_autherr;
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extern int nfsv3_procid[NFS_NPROCS];
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struct uio;
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struct buf;
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struct vattr;
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struct nameidata;
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/*
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* The set of signals the interrupt an I/O in progress for NFSMNT_INT mounts.
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* What should be in this set is open to debate, but I believe that since
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* I/O system calls on ufs are never interrupted by signals the set should
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* be minimal. My reasoning is that many current programs that use signals
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* such as SIGALRM will not expect file I/O system calls to be interrupted
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* by them and break.
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*/
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#define NFSINT_SIGMASK(set) \
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(SIGISMEMBER(set, SIGINT) || SIGISMEMBER(set, SIGTERM) || \
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SIGISMEMBER(set, SIGHUP) || SIGISMEMBER(set, SIGKILL) || \
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SIGISMEMBER(set, SIGQUIT))
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/*
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* Socket errors ignored for connectionless sockets??
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* For now, ignore them all
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*/
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#define NFSIGNORE_SOERROR(s, e) \
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((e) != EINTR && (e) != ERESTART && (e) != EWOULDBLOCK && \
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((s) & PR_CONNREQUIRED) == 0)
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/*
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* Nfs outstanding request list element
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*/
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struct nfsreq {
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TAILQ_ENTRY(nfsreq) r_chain;
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struct mbuf *r_mreq;
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struct mbuf *r_mrep;
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struct mbuf *r_md;
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caddr_t r_dpos;
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struct nfsmount *r_nmp;
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struct vnode *r_vp;
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u_int32_t r_xid;
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int r_flags; /* flags on request, see below */
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int r_retry; /* max retransmission count */
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int r_rexmit; /* current retrans count */
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int r_timer; /* tick counter on reply */
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u_int32_t r_procnum; /* NFS procedure number */
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int r_rtt; /* RTT for rpc */
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struct thread *r_td; /* Proc that did I/O system call */
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};
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/*
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* Queue head for nfsreq's
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*/
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extern TAILQ_HEAD(nfs_reqq, nfsreq) nfs_reqq;
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/* Flag values for r_flags */
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#define R_TIMING 0x01 /* timing request (in mntp) */
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#define R_SENT 0x02 /* request has been sent */
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#define R_SOFTTERM 0x04 /* soft mnt, too many retries */
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#define R_INTR 0x08 /* intr mnt, signal pending */
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#define R_SOCKERR 0x10 /* Fatal error on socket */
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#define R_TPRINTFMSG 0x20 /* Did a tprintf msg. */
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#define R_MUSTRESEND 0x40 /* Must resend request */
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#define R_GETONEREP 0x80 /* Probe for one reply only */
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extern struct nfsnodehashhead *nfsnodehashtbl;
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extern u_long nfsnodehash;
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#define NFSNOHASH(fhsum) \
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(&nfsnodehashtbl[(fhsum) & nfsnodehash])
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/*
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* Defines for WebNFS
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*/
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#define WEBNFS_ESC_CHAR '%'
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#define WEBNFS_SPECCHAR_START 0x80
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#define WEBNFS_NATIVE_CHAR 0x80
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/*
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* ..
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* Possibly more here in the future.
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*/
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/*
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* Macro for converting escape characters in WebNFS pathnames.
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* Should really be in libkern.
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*/
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#define HEXTOC(c) \
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((c) >= 'a' ? ((c) - ('a' - 10)) : \
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((c) >= 'A' ? ((c) - ('A' - 10)) : ((c) - '0')))
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#define HEXSTRTOI(p) \
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((HEXTOC(p[0]) << 4) + HEXTOC(p[1]))
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#ifdef NFS_DEBUG
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extern int nfs_debug;
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#define NFS_DEBUG_ASYNCIO 1 /* asynchronous i/o */
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#define NFS_DEBUG_WG 2 /* server write gathering */
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#define NFS_DEBUG_RC 4 /* server request caching */
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#define NFS_DPF(cat, args) \
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do { \
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if (nfs_debug & NFS_DEBUG_##cat) printf args; \
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} while (0)
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#else
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#define NFS_DPF(cat, args)
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#endif
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int nfs_init(struct vfsconf *vfsp);
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int nfs_uninit(struct vfsconf *vfsp);
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int nfs_mountroot(struct mount *mp, struct thread *td);
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int nfs_send(struct socket *, struct sockaddr *, struct mbuf *,
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struct nfsreq *);
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int nfs_sndlock(struct nfsreq *);
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void nfs_sndunlock(struct nfsreq *);
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int nfs_vinvalbuf(struct vnode *, int, struct ucred *, struct thread *,
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int);
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int nfs_readrpc(struct vnode *, struct uio *, struct ucred *);
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int nfs_writerpc(struct vnode *, struct uio *, struct ucred *, int *,
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int *);
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int nfs_commit(struct vnode *vp, u_quad_t offset, int cnt,
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struct ucred *cred, struct thread *td);
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int nfs_readdirrpc(struct vnode *, struct uio *, struct ucred *);
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int nfs_nfsiodnew(void);
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int nfs_asyncio(struct buf *, struct ucred *, struct thread *);
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int nfs_doio(struct buf *, struct ucred *, struct thread *);
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int nfs_readlinkrpc(struct vnode *, struct uio *, struct ucred *);
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int nfs_sigintr(struct nfsmount *, struct nfsreq *, struct thread *);
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int nfs_readdirplusrpc(struct vnode *, struct uio *, struct ucred *);
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int nfs_request(struct vnode *, struct mbuf *, int, struct thread *,
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struct ucred *, struct mbuf **, struct mbuf **, caddr_t *);
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int nfs_loadattrcache(struct vnode **, struct mbuf **, caddr_t *,
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struct vattr *, int);
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int nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *);
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void nfs_nhinit(void);
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int nfs_nmcancelreqs(struct nfsmount *);
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void nfs_timer(void*);
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int nfs_connect(struct nfsmount *, struct nfsreq *);
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void nfs_disconnect(struct nfsmount *);
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void nfs_safedisconnect(struct nfsmount *);
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int nfs_getattrcache(struct vnode *, struct vattr *);
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int nfsm_strtmbuf(struct mbuf **, char **, const char *, long);
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int nfs_bioread(struct vnode *, struct uio *, int, struct ucred *);
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int nfsm_uiotombuf(struct uio *, struct mbuf **, int, caddr_t *);
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void nfs_clearcommit(struct mount *);
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int nfs_writebp(struct buf *, int, struct thread *);
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int nfs_fsinfo(struct nfsmount *, struct vnode *, struct ucred *,
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struct thread *);
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int nfs_meta_setsize (struct vnode *, struct ucred *,
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struct thread *, u_quad_t);
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#endif /* _KERNEL */
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#endif
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