dark0707
/
px4-firmware
forked from Archive/PX4-Autopilot
1
0
Fork 0
Code Pull Requests Activity
px4-firmware/nuttx/fs/nfs/nfs_vfsops.c

928 lines
25 KiB
C
Raw Normal View History

NFS update + make some examples configurable as NSH built-ins git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4501 7fd9a85b-ad96-42d3-883c-3090e2eb8679
2012-03-21 21:51:01 -03:00
/****************************************************************************
* fs/nfs/nfs_vfsops.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Copyright (C) 2012 Jose Pablo Rojas Vargas. All rights reserved.
* Author: Jose Pablo Rojas Vargas <jrojas@nx-engineering.com>
*
* Leveraged from OpenBSD:
*
* Copyright (c) 1989, 1993, 1995
* 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.
* 3. 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/signal.h>
#include <sys/proc.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/buf.h>
#include <sys/mbuf.h>
#include <sys/dirent.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/statfs>
#include <sys/queue.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfsnode.h>
#include <nfs/nfs.h>
#include <nfs/nfsmount.h>
#include <nfs/xdr_subs.h>
#include <nfs/nfsm_subs.h>
#include <nfs/nfsdiskless.h>
#include <nfs/nfs_var.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Type Definitions
****************************************************************************/
/* nfs vfs operations. */
const struct vfsops nfs_vfsops =
{
nfs_mount,
nfs_start,
nfs_unmount,
nfs_root,
nfs_quotactl,
nfs_statfs,
nfs_sync,
nfs_vget,
nfs_fhtovp,
nfs_vptofh,
nfs_vfs_init,
nfs_sysctl,
nfs_checkexp
};
/****************************************************************************
* External Public Data (this belong in a header file)
****************************************************************************/
extern struct nfsstats nfsstats;
extern int nfs_ticks;
extern uint32_t nfs_procids[NFS_NPROCS];
/****************************************************************************
* Public Function Prototypes (this belong in a header file)
****************************************************************************/
int nfs_sysctl(int *, u_int, void *, size_t *, void *, size_t, struct proc *);
int nfs_checkexp(struct mount *, struct mbuf *, int *, struct ucred **);
struct mount *nfs_mount_diskless(struct nfs_dlmount *, char *, int);
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Publikc Functions
****************************************************************************/
/* nfs statfs call */
int nfs_statfs(struct file *filep, struct statfs *sbp)
{
struct nfs_statfs *sfp = NULL;
struct nfsmount *nmp = VFSTONFS(filep->f_inode);
int error = 0;
struct nfsnode *np = VTONFS(filep->f_priv);
uint64_t tquad;
error = nfs_nget(mp, (nfsfh_t *) nmp->nm_fh, nmp->nm_fhsize, &np);
if (error)
return (error);
if ((nmp->nm_flag & NFSMNT_GOTFSINFO) == 0)
(void)nfs_fsinfo(nmp);
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
error = nfs_request(nmp, NFSPROC_FSSTAT);
if (error)
goto nfsmout;
sbp->f_iosize = min(nmp->nm_rsize, nmp->nm_wsize);
if (info.nmi_v3)
{
sbp->f_bsize = NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_tbytes);
sbp->f_blocks = tquad / (u_quad_t) NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_fbytes);
sbp->f_bfree = tquad / (u_quad_t) NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_abytes);
sbp->f_bavail = (quad_t) tquad / (quad_t) NFS_FABLKSIZE;
tquad = fxdr_hyper(&sfp->sf_tfiles);
sbp->f_files = tquad;
tquad = fxdr_hyper(&sfp->sf_ffiles);
sbp->f_ffree = tquad;
sbp->f_favail = tquad;
sbp->f_namemax = MAXNAMLEN;
}
else
{
sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
sbp->f_files = 0;
sbp->f_ffree = 0;
}
copy_statfs_info(sbp, mp);
nfsmout:
return (error);
}
/* nfs version 3 fsinfo rpc call */
int nfs_fsinfo(struct nfsmount *nmp)
{
struct nfsv3_fsinfo *fsp;
struct nfsm_info info;
uint32_t pref, max;
int error = 0;
nfsstats.rpccnt[NFSPROC_FSINFO]++;
error = nfs_request(nmp, NFSPROC_FSINFO);
if (error)
{
goto nfsmout;
}
pref = fxdr_unsigned(uint32_t, fsp->fs_wtpref);
if (pref < nmp->nm_wsize)
nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & ~(NFS_FABLKSIZE - 1);
max = fxdr_unsigned(uint32_t, fsp->fs_wtmax);
if (max < nmp->nm_wsize)
{
nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
if (nmp->nm_wsize == 0)
nmp->nm_wsize = max;
}
pref = fxdr_unsigned(uint32_t, fsp->fs_rtpref);
if (pref < nmp->nm_rsize)
nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & ~(NFS_FABLKSIZE - 1);
max = fxdr_unsigned(uint32_t, fsp->fs_rtmax);
if (max < nmp->nm_rsize)
{
nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
if (nmp->nm_rsize == 0)
nmp->nm_rsize = max;
}
pref = fxdr_unsigned(uint32_t, fsp->fs_dtpref);
if (pref < nmp->nm_readdirsize)
nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & ~(NFS_DIRBLKSIZ - 1);
if (max < nmp->nm_readdirsize)
{
nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
if (nmp->nm_readdirsize == 0)
nmp->nm_readdirsize = max;
}
nmp->nm_flag |= NFSMNT_GOTFSINFO;
nfsmout:
return (error);
}
/* Mount a remote root fs via. NFS. It goes like this:
* - Call nfs_boot_init() to fill in the nfs_diskless struct
* (using RARP, bootparam RPC, mountd RPC)
* - hand craft the swap nfs vnode hanging off a fake mount point
* if swdevt[0].sw_dev == NODEV
* - build the rootfs mount point and call mountnfs() to do the rest.
*/
int nfs_mountroot(void)
{
struct nfs_diskless nd;
struct vattr attr;
struct mount *mp;
struct vnode *vp;
struct proc *procp;
long n;
int error;
procp = curproc; /* XXX */
/* Call nfs_boot_init() to fill in the nfs_diskless struct.
* Side effect: Finds and configures a network interface.
*/
bzero((caddr_t) & nd, sizeof(nd));
nfs_boot_init(&nd, procp);
/* Create the root mount point. */
if (nfs_boot_getfh(&nd.nd_boot, "root", &nd.nd_root, -1))
panic("nfs_mountroot: root");
mp = nfs_mount_diskless(&nd.nd_root, "/", 0);
nfs_root(mp, &rootvp);
printf("root on %s\n", nd.nd_root.ndm_host);
/* Link it into the mount list. */
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
vfs_unbusy(mp);
/* Get root attributes (for the time). */
error = VOP_GETATTR(rootvp, &attr, procp->p_ucred, procp);
if (error)
panic("nfs_mountroot: getattr for root");
n = attr.va_atime.tv_sec;
#ifdef DEBUG
printf("root time: 0x%lx\n", n);
#endif
inittodr(n);
#ifdef notyet
/* Set up swap credentials. */
proc0.p_ucred->cr_uid = ntohl(nd.swap_ucred.cr_uid);
proc0.p_ucred->cr_gid = ntohl(nd.swap_ucred.cr_gid);
if ((proc0.p_ucred->cr_ngroups = ntohs(nd.swap_ucred.cr_ngroups)) > NGROUPS)
proc0.p_ucred->cr_ngroups = NGROUPS;
for (i = 0; i < proc0.p_ucred->cr_ngroups; i++)
proc0.p_ucred->cr_groups[i] = ntohl(nd.swap_ucred.cr_groups[i]);
#endif
/* "Mount" the swap device.
*
* On a "dataless" configuration (swap on disk) we will have:
* (swdevt[0].sw_dev != NODEV) identifying the swap device.
*/
if (bdevvp(swapdev, &swapdev_vp))
panic("nfs_mountroot: can't setup swap vp");
if (swdevt[0].sw_dev != NODEV)
{
printf("swap on device 0x%x\n", swdevt[0].sw_dev);
return (0);
}
/* If swapping to an nfs node: (swdevt[0].sw_dev == NODEV)
* Create a fake mount point just for the swap vnode so that the
* swap file can be on a different server from the rootfs.
*
* Wait 5 retries, finally no swap is cool. -mickey
*/
error = nfs_boot_getfh(&nd.nd_boot, "swap", &nd.nd_swap, 5);
if (!error)
{
mp = nfs_mount_diskless(&nd.nd_swap, "/swap", 0);
nfs_root(mp, &vp);
vfs_unbusy(mp);
/* Since the swap file is not the root dir of a file system,
* hack it to a regular file.
*/
vp->v_type = VREG;
vp->v_flag = 0;
/* Next line is a hack to make swapmount() work on NFS
* swap files.
* XXX-smurph
*/
swdevt[0].sw_dev = NETDEV;
/* end hack */
swdevt[0].sw_vp = vp;
/* Find out how large the swap file is. */
error = VOP_GETATTR(vp, &attr, procp->p_ucred, procp);
if (error)
printf("nfs_mountroot: getattr for swap\n");
n = (long)(attr.va_size >> DEV_BSHIFT);
printf("swap on %s\n", nd.nd_swap.ndm_host);
#ifdef DEBUG
printf("swap size: 0x%lx (blocks)\n", n);
#endif
return (0);
}
printf("WARNING: no swap\n");
swdevt[0].sw_dev = NODEV;
swdevt[0].sw_vp = NULL;
return (0);
}
/* Internal version of mount system call for diskless setup. */
struct mount *nfs_mount_diskless(struct nfs_dlmount *ndmntp, char *mntname,
int mntflag)
{
struct nfs_args args;
struct mount *mp;
struct mbuf *m;
int error;
if (vfs_rootmountalloc("nfs", mntname, &mp))
panic("nfs_mount_diskless: vfs_rootmountalloc failed");
mp->mnt_flag |= mntflag;
/* Initialize mount args. */
bzero((caddr_t) & args, sizeof(args));
args.addr = (struct sockaddr *)&ndmntp->ndm_saddr;
args.addrlen = args.addr->sa_len;
args.sotype = SOCK_DGRAM;
args.fh = ndmntp->ndm_fh;
args.fhsize = NFSX_V2FH;
args.hostname = ndmntp->ndm_host;
#ifdef NFS_BOOT_OPTIONS
args.flags |= NFS_BOOT_OPTIONS;
#endif
#ifdef NFS_BOOT_RWSIZE
/* Reduce rsize,wsize for interfaces that consistently
* drop fragments of long UDP messages. (i.e. wd8003).
* You can always change these later via remount.
*/
args.flags |= NFSMNT_WSIZE | NFSMNT_RSIZE;
args.wsize = NFS_BOOT_RWSIZE;
args.rsize = NFS_BOOT_RWSIZE;
#endif
/* Get mbuf for server sockaddr. */
m = m_get(M_WAIT, MT_SONAME);
bcopy((caddr_t) args.addr, mtod(m, caddr_t), (m->m_len = args.addr->sa_len));
error = mountnfs(&args, mp, m, mntname, args.hostname);
if (error)
panic("nfs_mountroot: mount %s failed: %d", mntname, error);
return (mp);
}
void
nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp,
struct nfs_args *nargp)
{
int s;
int adjsock = 0;
int maxio;
s = splsoftnet();
#if 0
/* Re-bind if rsrvd port requested and wasn't on one */
adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
&& (argp->flags & NFSMNT_RESVPORT);
#endif
/* Also re-bind if we're switching to/from a connected UDP socket */
adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != (argp->flags & NFSMNT_NOCONN));
/* Update flags atomically. Don't change the lock bits. */
nmp->nm_flag =
(argp->flags & ~NFSMNT_INTERNAL) | (nmp->nm_flag & NFSMNT_INTERNAL);
splx(s);
if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0)
{
nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
if (nmp->nm_timeo < NFS_MINTIMEO)
nmp->nm_timeo = NFS_MINTIMEO;
else if (nmp->nm_timeo > NFS_MAXTIMEO)
nmp->nm_timeo = NFS_MAXTIMEO;
}
if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1)
nmp->nm_retry = MIN(argp->retrans, NFS_MAXREXMIT);
if (!(nmp->nm_flag & NFSMNT_SOFT))
nmp->nm_retry = NFS_MAXREXMIT + 1; /* past clip limit */
if (argp->flags & NFSMNT_NFSV3)
{
if (argp->sotype == SOCK_DGRAM)
maxio = NFS_MAXDGRAMDATA;
else
maxio = NFS_MAXDATA;
}
else
maxio = NFS_V2MAXDATA;
if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0)
{
int osize = nmp->nm_wsize;
nmp->nm_wsize = argp->wsize;
/* Round down to multiple of blocksize */
nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
if (nmp->nm_wsize <= 0)
nmp->nm_wsize = NFS_FABLKSIZE;
adjsock |= (nmp->nm_wsize != osize);
}
if (nmp->nm_wsize > maxio)
nmp->nm_wsize = maxio;
if (nmp->nm_wsize > MAXBSIZE)
nmp->nm_wsize = MAXBSIZE;
if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0)
{
int osize = nmp->nm_rsize;
nmp->nm_rsize = argp->rsize;
/* Round down to multiple of blocksize */
nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
if (nmp->nm_rsize <= 0)
nmp->nm_rsize = NFS_FABLKSIZE;
adjsock |= (nmp->nm_rsize != osize);
}
if (nmp->nm_rsize > maxio)
nmp->nm_rsize = maxio;
if (nmp->nm_rsize > MAXBSIZE)
nmp->nm_rsize = MAXBSIZE;
if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0)
{
nmp->nm_readdirsize = argp->readdirsize;
/* Round down to multiple of blocksize */
nmp->nm_readdirsize &= ~(NFS_DIRBLKSIZ - 1);
if (nmp->nm_readdirsize < NFS_DIRBLKSIZ)
nmp->nm_readdirsize = NFS_DIRBLKSIZ;
}
else if (argp->flags & NFSMNT_RSIZE)
nmp->nm_readdirsize = nmp->nm_rsize;
if (nmp->nm_readdirsize > maxio)
nmp->nm_readdirsize = maxio;
if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0 &&
argp->maxgrouplist <= NFS_MAXGRPS)
nmp->nm_numgrps = argp->maxgrouplist;
if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0 &&
argp->readahead <= NFS_MAXRAHEAD)
nmp->nm_readahead = argp->readahead;
if (argp->flags & NFSMNT_ACREGMIN && argp->acregmin >= 0)
{
if (argp->acregmin > 0xffff)
nmp->nm_acregmin = 0xffff;
else
nmp->nm_acregmin = argp->acregmin;
}
if (argp->flags & NFSMNT_ACREGMAX && argp->acregmax >= 0)
{
if (argp->acregmax > 0xffff)
nmp->nm_acregmax = 0xffff;
else
nmp->nm_acregmax = argp->acregmax;
}
if (nmp->nm_acregmin > nmp->nm_acregmax)
nmp->nm_acregmin = nmp->nm_acregmax;
if (argp->flags & NFSMNT_ACDIRMIN && argp->acdirmin >= 0)
{
if (argp->acdirmin > 0xffff)
nmp->nm_acdirmin = 0xffff;
else
nmp->nm_acdirmin = argp->acdirmin;
}
if (argp->flags & NFSMNT_ACDIRMAX && argp->acdirmax >= 0)
{
if (argp->acdirmax > 0xffff)
nmp->nm_acdirmax = 0xffff;
else
nmp->nm_acdirmax = argp->acdirmax;
}
if (nmp->nm_acdirmin > nmp->nm_acdirmax)
nmp->nm_acdirmin = nmp->nm_acdirmax;
if (nmp->nm_so && adjsock)
{
nfs_disconnect(nmp);
if (nmp->nm_sotype == SOCK_DGRAM)
while (nfs_connect(nmp, NULL))
{
printf("nfs_args: retrying connect\n");
(void)tsleep((caddr_t) & lbolt, PSOCK, "nfscon", 0);
}
}
/* Update nargp based on nmp */
nargp->wsize = nmp->nm_wsize;
nargp->rsize = nmp->nm_rsize;
nargp->readdirsize = nmp->nm_readdirsize;
nargp->timeo = nmp->nm_timeo;
nargp->retrans = nmp->nm_retry;
nargp->maxgrouplist = nmp->nm_numgrps;
nargp->readahead = nmp->nm_readahead;
nargp->acregmin = nmp->nm_acregmin;
nargp->acregmax = nmp->nm_acregmax;
nargp->acdirmin = nmp->nm_acdirmin;
nargp->acdirmax = nmp->nm_acdirmax;
}
/* VFS Operations.
*
* mount system call
* It seems a bit dumb to copyinstr() the host and path here and then
* bcopy() them in mountnfs(), but I wanted to detect errors before
* doing the sockargs() call because sockargs() allocates an mbuf and
* an error after that means that I have to release the mbuf.
*/
/* ARGSUSED */
int
nfs_mount(struct mount *mp, const char *path, void *data,
struct nameidata *ndp, struct proc *p)
{
int error;
struct nfs_args args;
struct mbuf *nam;
char pth[MNAMELEN], hst[MNAMELEN];
size_t len;
u_char nfh[NFSX_V3FHMAX];
error = copyin(data, &args, sizeof(args.version));
if (error)
return (error);
if (args.version == 3)
{
error = copyin(data, (caddr_t) & args, sizeof(struct nfs_args3));
args.flags &= ~(NFSMNT_INTERNAL | NFSMNT_NOAC);
}
else if (args.version == NFS_ARGSVERSION)
{
error = copyin(data, (caddr_t) & args, sizeof(struct nfs_args));
args.flags &= ~NFSMNT_NOAC; /* XXX - compatibility */
}
else
return (EPROGMISMATCH);
if (error)
return (error);
if ((args.flags & (NFSMNT_NFSV3 | NFSMNT_RDIRPLUS)) == NFSMNT_RDIRPLUS)
return (EINVAL);
if (nfs_niothreads < 0)
{
nfs_niothreads = 4;
nfs_getset_niothreads(1);
}
if (mp->mnt_flag & MNT_UPDATE)
{
struct nfsmount *nmp = VFSTONFS(mp);
if (nmp == NULL)
return (EIO);
/* When doing an update, we can't change from or to v3. */
args.flags = (args.flags & ~(NFSMNT_NFSV3)) |
(nmp->nm_flag & (NFSMNT_NFSV3));
nfs_decode_args(nmp, &args, &mp->mnt_stat.mount_info.nfs_args);
return (0);
}
if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX)
return (EINVAL);
error = copyin((caddr_t) args.fh, (caddr_t) nfh, args.fhsize);
if (error)
return (error);
error = copyinstr(path, pth, MNAMELEN - 1, &len);
if (error)
return (error);
bzero(&pth[len], MNAMELEN - len);
error = copyinstr(args.hostname, hst, MNAMELEN - 1, &len);
if (error)
return (error);
bzero(&hst[len], MNAMELEN - len);
/* sockargs() call must be after above copyin() calls */
error = sockargs(&nam, args.addr, args.addrlen, MT_SONAME);
if (error)
return (error);
args.fh = nfh;
error = mountnfs(&args, mp, nam, pth, hst);
return (error);
}
/* Common code for mount and mountroot */
int
mountnfs(struct nfs_args *argp, struct mount *mp, struct mbuf *nam, char *pth,
char *hst)
{
struct nfsmount *nmp;
int error;
if (mp->mnt_flag & MNT_UPDATE)
{
nmp = VFSTONFS(mp);
/* update paths, file handles, etc, here XXX */
m_freem(nam);
return (0);
}
else
{
nmp = malloc(sizeof(struct nfsmount), M_NFSMNT, M_WAITOK | M_ZERO);
mp->mnt_data = (qaddr_t) nmp;
}
vfs_getnewfsid(mp);
nmp->nm_mountp = mp;
nmp->nm_timeo = NFS_TIMEO;
nmp->nm_retry = NFS_RETRANS;
nmp->nm_wsize = NFS_WSIZE;
nmp->nm_rsize = NFS_RSIZE;
nmp->nm_readdirsize = NFS_READDIRSIZE;
nmp->nm_numgrps = NFS_MAXGRPS;
nmp->nm_readahead = NFS_DEFRAHEAD;
nmp->nm_fhsize = argp->fhsize;
nmp->nm_acregmin = NFS_MINATTRTIMO;
nmp->nm_acregmax = NFS_MAXATTRTIMO;
nmp->nm_acdirmin = NFS_MINATTRTIMO;
nmp->nm_acdirmax = NFS_MAXATTRTIMO;
bcopy((caddr_t) argp->fh, (caddr_t) nmp->nm_fh, argp->fhsize);
strncpy(&mp->mnt_stat.f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN);
bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN);
bcopy(argp, &mp->mnt_stat.mount_info.nfs_args, sizeof(*argp));
nmp->nm_nam = nam;
nfs_decode_args(nmp, argp, &mp->mnt_stat.mount_info.nfs_args);
RB_INIT(&nmp->nm_ntree);
TAILQ_INIT(&nmp->nm_reqsq);
timeout_set(&nmp->nm_rtimeout, nfs_timer, nmp);
/* Set up the sockets and per-host congestion */
nmp->nm_sotype = argp->sotype;
nmp->nm_soproto = argp->proto;
/* For Connection based sockets (TCP,...) defer the connect until
* the first request, in case the server is not responding.
*/
if (nmp->nm_sotype == SOCK_DGRAM && (error = nfs_connect(nmp, NULL)))
goto bad;
/* This is silly, but it has to be set so that vinifod() works.
* We do not want to do an nfs_statfs() here since we can get
* stuck on a dead server and we are holding a lock on the mount
* point.
*/
mp->mnt_stat.f_iosize = NFS_MAXDGRAMDATA;
return (0);
bad:
nfs_disconnect(nmp);
free((caddr_t) nmp, M_NFSMNT);
m_freem(nam);
return (error);
}
/* unmount system call */
int nfs_unmount(struct mount *mp, int mntflags, struct proc *p)
{
struct nfsmount *nmp;
int error, flags;
nmp = VFSTONFS(mp);
flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
error = vflush(mp, NULL, flags);
if (error)
return (error);
nfs_disconnect(nmp);
m_freem(nmp->nm_nam);
timeout_del(&nmp->nm_rtimeout);
free(nmp, M_NFSMNT);
return (0);
}
/* Return root of a filesystem */
int nfs_root(struct mount *mp, struct vnode **vpp)
{
struct nfsmount *nmp;
struct nfsnode *np;
int error;
nmp = VFSTONFS(mp);
error = nfs_nget(mp, (nfsfh_t *) nmp->nm_fh, nmp->nm_fhsize, &np);
if (error)
return (error);
*vpp = NFSTOV(np);
return (0);
}
/* Flush out the buffer cache */
int nfs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct proc *p)
{
struct vnode *vp;
int error, allerror = 0;
/* Don't traverse the vnode list if we want to skip all of them. */
if (waitfor == MNT_LAZY)
return (allerror);
/* Force stale buffer cache information to be flushed. */
loop:
LIST_FOREACH(vp, &mp->mnt_vnodelist, v_mntvnodes)
{
/* If the vnode that we are about to sync is no longer
* associated with this mount point, start over.
*/
if (vp->v_mount != mp)
goto loop;
if (VOP_ISLOCKED(vp) || LIST_FIRST(&vp->v_dirtyblkhd) == NULL)
continue;
if (vget(vp, LK_EXCLUSIVE, p))
goto loop;
error = VOP_FSYNC(vp, cred, waitfor, p);
if (error)
allerror = error;
vput(vp);
}
return (allerror);
}
/* NFS flat namespace lookup.
* Currently unsupported.
*/
/* ARGSUSED */
int nfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp)
{
return (EOPNOTSUPP);
}
/* Do that sysctl thang... */
int
nfs_sysctl(int *name, u_int namelen, void *oldp, size_t * oldlenp, void *newp,
size_t newlen, struct proc *p)
{
int rv;
/* All names at this level are terminal. */
if (namelen > 1)
return ENOTDIR; /* overloaded */
switch (name[0])
{
case NFS_NFSSTATS:
if (!oldp)
{
*oldlenp = sizeof nfsstats;
return 0;
}
if (*oldlenp < sizeof nfsstats)
{
*oldlenp = sizeof nfsstats;
return ENOMEM;
}
rv = copyout(&nfsstats, oldp, sizeof nfsstats);
if (rv)
return rv;
if (newp && newlen != sizeof nfsstats)
return EINVAL;
if (newp)
{
return copyin(newp, &nfsstats, sizeof nfsstats);
}
return 0;
case NFS_NIOTHREADS:
nfs_getset_niothreads(0);
rv = sysctl_int(oldp, oldlenp, newp, newlen, &nfs_niothreads);
if (newp)
nfs_getset_niothreads(1);
return rv;
default:
return EOPNOTSUPP;
}
}
/* At this point, this should never happen */
/* ARGSUSED */
int nfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp)
{
return (EINVAL);
}
/* Vnode pointer to File handle, should never happen either */
/* ARGSUSED */
int nfs_vptofh(struct vnode *vp, struct fid *fhp)
{
return (EINVAL);
}
/* Vfs start routine, a no-op. */
/* ARGSUSED */
int nfs_start(struct mount *mp, int flags, struct proc *p)
{
return (0);
}
/* Do operations associated with quotas, not supported */
/* ARGSUSED */
int
nfs_quotactl(struct mount *mp, int cmd, uid_t uid, caddr_t arg, struct proc *p)
{
return (EOPNOTSUPP);
}
/* check export permission, not supported */
/* ARGUSED */
int
nfs_checkexp(struct mount *mp, struct mbuf *nam, int *exflagsp,
struct ucred **credanonp)
{
return (EOPNOTSUPP);
}