freebsd-dev/sys/fs/nfsclient/nfsmount.h
Rick Macklem dd5b5a9431 Patch the experimental NFS client so that there is a timeout
for negative name cache entries in a manner analogous to
r202767 for the regular NFS client. Also, make the code in
nfs_lookup() compatible with that of the regular client
and replace the sysctl variable that enabled negative name
caching with the mount point option.

MFC after:	2 weeks
2010-01-31 19:12:24 +00:00

110 lines
4.4 KiB
C

/*-
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Rick Macklem at The University of Guelph.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _NFSCLIENT_NFSMOUNT_H_
#define _NFSCLIENT_NFSMOUNT_H_
/*
* Mount structure.
* One allocated on every NFS mount.
* Holds NFS specific information for mount.
*/
struct nfsmount {
struct mtx nm_mtx;
int nm_flag; /* Flags for soft/hard... */
int nm_state; /* Internal state flags */
struct mount *nm_mountp; /* Vfs structure for this filesystem */
int nm_numgrps; /* Max. size of groupslist */
u_char nm_fh[NFSX_FHMAX]; /* File handle of root dir */
int nm_fhsize; /* Size of root file handle */
struct nfssockreq nm_sockreq; /* Socket Info */
int nm_timeo; /* Init timer for NFSMNT_DUMBTIMR */
int nm_retry; /* Max retries */
int nm_timeouts; /* Request timeouts */
int nm_rsize; /* Max size of read rpc */
int nm_wsize; /* Max size of write rpc */
int nm_readdirsize; /* Size of a readdir rpc */
int nm_readahead; /* Num. of blocks to readahead */
int nm_wcommitsize; /* Max size of commit for write */
int nm_acdirmin; /* Directory attr cache min lifetime */
int nm_acdirmax; /* Directory attr cache max lifetime */
int nm_acregmin; /* Reg file attr cache min lifetime */
int nm_acregmax; /* Reg file attr cache max lifetime */
u_char nm_verf[NFSX_VERF]; /* write verifier */
TAILQ_HEAD(, buf) nm_bufq; /* async io buffer queue */
short nm_bufqlen; /* number of buffers in queue */
short nm_bufqwant; /* process wants to add to the queue */
int nm_bufqiods; /* number of iods processing queue */
u_int64_t nm_maxfilesize; /* maximum file size */
int nm_tprintf_initial_delay; /* initial delay */
int nm_tprintf_delay; /* interval for messages */
int nm_negnametimeo; /* timeout for -ve entries (sec) */
/* Newnfs additions */
struct nfsclclient *nm_clp;
uid_t nm_uid; /* Uid for SetClientID etc. */
u_int64_t nm_clval; /* identifies which clientid */
u_int64_t nm_fsid[2]; /* NFSv4 fsid */
u_int16_t nm_krbnamelen; /* Krb5 host principal, if any */
u_int16_t nm_dirpathlen; /* and mount dirpath, for V4 */
u_int16_t nm_srvkrbnamelen; /* and the server's target name */
u_char nm_name[1]; /* malloc'd actual len of krbname + dirpath */
};
#define nm_nam nm_sockreq.nr_nam
#define nm_sotype nm_sockreq.nr_sotype
#define nm_so nm_sockreq.nr_so
#define nm_soflags nm_sockreq.nr_soflags
#define nm_soproto nm_sockreq.nr_soproto
#define nm_client nm_sockreq.nr_client
#define nm_krbname nm_name
#define NFSMNT_DIRPATH(m) (&((m)->nm_name[(m)->nm_krbnamelen + 1]))
#define NFSMNT_SRVKRBNAME(m) \
(&((m)->nm_name[(m)->nm_krbnamelen + (m)->nm_dirpathlen + 2]))
#if defined(_KERNEL)
/*
* Convert mount ptr to nfsmount ptr.
*/
#define VFSTONFS(mp) ((struct nfsmount *)((mp)->mnt_data))
#ifndef NFS_DEFAULT_NEGNAMETIMEO
#define NFS_DEFAULT_NEGNAMETIMEO 60
#endif
#endif /* _KERNEL */
#endif /* _NFSCLIENT_NFSMOUNT_H_ */