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NetBSD/sys/smbfs/smbfs_vfsops.c

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/* $NetBSD: smbfs_vfsops.c,v 1.2 2001/11/10 13:22:20 lukem Exp $ */
/*
* Copyright (c) 2000, Boris Popov
* All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Boris Popov.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smbfs_vfsops.c,v 1.2 2001/11/10 13:22:20 lukem Exp $");
#include "netsmb.h"
#ifndef NNETSMB
#error "SMBFS requires NSMB device"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/malloc.h>
#include <sys/tree.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_dev.h>
#include <netsmb/smb_lock.h>
#include <smbfs/smbfs.h>
#include <smbfs/smbfs_node.h>
#include <smbfs/smbfs_subr.h>
#ifdef FB_CURRENT
#include <sys/bio.h>
#endif
#include <sys/buf.h>
int smbfs_debuglevel = 0;
#ifndef NetBSD
static int smbfs_version = SMBFS_VERSION;
#endif
#ifdef SMBFS_USEZONE
#include <vm/vm_extern.h>
#include <vm/vm_zone.h>
vm_zone_t smbfsmount_zone;
#endif
#ifndef NetBSD
#ifdef SYSCTL_DECL
SYSCTL_DECL(_vfs_smbfs);
#endif
SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system");
SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
#endif
int smbfs_mount __P((struct mount *, const char *, void *,
struct nameidata *, struct proc *));
int smbfs_quotactl __P((struct mount *, int, uid_t, caddr_t,
struct proc *));
int smbfs_root __P((struct mount *, struct vnode **));
int smbfs_start __P((struct mount *, int, struct proc *));
int smbfs_statfs __P((struct mount *, struct statfs *,
struct proc *));
int smbfs_sync __P((struct mount *, int, struct ucred *,
struct proc *));
int smbfs_unmount __P((struct mount *, int, struct proc *));
void smbfs_init __P((void));
#ifndef __NetBSD__
static int smbfs_uninit __P((struct vfsconf *vfsp));
#else
static void smbfs_uninit __P((void));
#endif
int smbfs_vget __P((struct mount *mp, ino_t ino,
struct vnode **vpp));
int smbfs_fhtovp __P((struct mount *, struct fid *,
struct vnode **));
int smbfs_vptofh __P((struct vnode *, struct fid *));
#ifndef NetBSD
static struct vfsops smbfs_vfsops = {
smbfs_mount,
smbfs_start,
smbfs_unmount,
smbfs_root,
smbfs_quotactl,
smbfs_statfs,
smbfs_sync,
#if __FreeBSD_version > 400008
vfs_stdvget,
vfs_stdfhtovp, /* shouldn't happen */
vfs_stdcheckexp,
vfs_stdvptofh, /* shouldn't happen */
#else
smbfs_vget,
smbfs_fhtovp,
smbfs_vptofh,
#endif
smbfs_init,
smbfs_uninit,
#ifndef FB_RELENG3
vfs_stdextattrctl,
#else
#define M_USE_RESERVE M_KERNEL
&sysctl___vfs_smbfs
#endif
};
VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
#else
extern struct vnodeopv_desc smbfs_vnodeop_opv_desc;
struct vnodeopv_desc *smbfs_vnodeopv_descs[] = {
&smbfs_vnodeop_opv_desc,
NULL,
};
struct vfsops smbfs_vfsops = {
MOUNT_SMBFS,
smbfs_mount,
smbfs_start,
smbfs_unmount,
smbfs_root,
smbfs_quotactl,
smbfs_statfs,
smbfs_sync,
smbfs_vget,
smbfs_fhtovp,
smbfs_vptofh,
smbfs_init,
#ifdef __NetBSD__
smbfs_uninit,
#endif
(int (*) (int *, u_int, void *, size_t *, void *, size_t, struct proc *))
eopnotsupp, /* sysctl */
(int (*)(void)) eopnotsupp, /* mountroot */
(int (*)(struct mount *, struct mbuf *, int *, struct ucred **))
eopnotsupp, /* checkexp */
smbfs_vnodeopv_descs,
};
#define M_USE_RESERVE M_WAITOK
#ifndef index
#define index strchr
#endif
#endif
#ifdef MODULE_DEPEND
MODULE_DEPEND(smbfs, netsmb, 1, 1, 1);
MODULE_DEPEND(smbfs, libiconv, 1, 1, 1);
#endif
int smbfs_pbuf_freecnt = -1; /* start out unlimited */
int
smbfs_mount(struct mount *mp, const char *path, void *data,
struct nameidata *ndp, struct proc *p)
{
struct smbfs_args args; /* will hold data from mount request */
struct smbmount *smp = NULL;
struct smb_conn *scp;
struct smb_share *ssp = NULL;
struct vnode *vp;
struct smb_cred scred;
size_t size;
int error;
char *pc, *pe;
SMBVDEBUG("\n");
if (data == NULL) {
printf("missing data argument\n");
return EINVAL;
}
if (mp->mnt_flag & MNT_UPDATE) {
printf("MNT_UPDATE not implemented\n");
return EOPNOTSUPP;
}
error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args));
if (error)
return error;
if (args.version != SMBFS_VERSION) {
printf("mount version mismatch: kernel=%d, mount=%d\n",
SMBFS_VERSION, args.version);
return EINVAL;
}
smb_makescred(&scred, p, p->p_ucred);
error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp);
if (error) {
printf("invalid device handle %d\n", args.dev);
return error;
}
scp = SSTOCN(ssp);
smb_share_unlock(ssp, 0, &scred);
mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
#ifdef SMBFS_USEZONE
smp = zalloc(smbfsmount_zone);
#else
MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_USE_RESERVE);
#endif
if (smp == NULL) {
printf("could not alloc smbmount\n");
error = ENOMEM;
goto bad;
}
bzero(smp, sizeof(*smp));
mp->mnt_data = (qaddr_t)smp;
smp->sm_share = ssp;
smp->sm_root = NULL;
smp->sm_args = args;
smp->sm_caseopt = args.caseopt;
smp->sm_args.file_mode = (smp->sm_args.file_mode &
(S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
smp->sm_args.dir_mode = (smp->sm_args.dir_mode &
(S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
simple_lock_init(&smp->sm_npslock);
error = copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
if (error)
goto bad;
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
pc = mp->mnt_stat.f_mntfromname;
pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
bzero(pc, MNAMELEN);
*pc++ = '/';
*pc++ = '/';
pc=index(strncpy(pc, SSTOVC(ssp)->vc_user, pe - pc - 2), 0);
if (pc < pe-1) {
*(pc++) = '@';
pc = index(strncpy(pc, scp->sc_srvname, pe - pc - 2), 0);
if (pc < pe - 1) {
*(pc++) = '/';
strncpy(pc, ssp->ss_name, pe - pc - 2);
}
}
/* protect against invalid mount points */
smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0';
#ifdef __NetBSD__
vfs_getnewfsid(mp);
#else
vfs_getnewfsid(mp, MOUNT_SMBFS);
#endif
error = smbfs_root(mp, &vp);
if (error)
goto bad;
VOP_UNLOCK(vp, 0/* , curproc */);
SMBVDEBUG("root.v_usecount = %ld\n", vp->v_usecount);
return error;
bad:
if (smp)
#ifdef SMBFS_USEZONE
zfree(smbfsmount_zone, smp);
#else
free(smp, M_SMBFSDATA);
#endif
if (ssp)
smb_share_put(ssp, p);
return error;
}
/* Unmount the filesystem described by mp. */
int
smbfs_unmount(struct mount *mp, int mntflags, struct proc *p)
{
struct smbmount *smp = VFSTOSMBFS(mp);
struct vnode *vp;
int error, flags;
SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
error = VFS_ROOT(mp, &vp);
if (error)
return (error);
if ((mntflags & MNT_FORCE) == 0 && vp->v_usecount > 2) {
printf("smbfs_unmount: usecnt=%d\n", vp->v_usecount);
vput(vp);
return EBUSY;
}
error = vflush(mp, vp, flags);
if (error) {
vput(vp);
return error;
}
vput(vp);
vrele(vp);
vgone(vp);
smb_share_put(smp->sm_share, p);
mp->mnt_data = (qaddr_t)0;
#ifdef SMBFS_USEZONE
zfree(smbfsmount_zone, smp);
#else
free(smp, M_SMBFSDATA);
#endif
mp->mnt_flag &= ~MNT_LOCAL;
return error;
}
/*
* Return locked root vnode of a filesystem
*/
int
smbfs_root(struct mount *mp, struct vnode **vpp)
{
struct smbmount *smp = VFSTOSMBFS(mp);
struct vnode *vp;
struct smbnode *np;
struct smbfattr fattr;
struct proc *p = curproc;
struct ucred *cred = p->p_ucred;
struct smb_cred scred;
int error;
SMBVDEBUG("\n");
if (smp->sm_root) {
*vpp = SMBTOV(smp->sm_root);
vget(*vpp, LK_EXCLUSIVE | LK_RETRY/* , p */);
return 0;
}
smb_makescred(&scred, p, cred);
error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred);
error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp);
if (error)
return error;
vp->v_flag |= VROOT;
np = VTOSMB(vp);
smp->sm_root = np;
*vpp = vp;
return 0;
}
/*
* Vfs start routine, a no-op.
*/
/* ARGSUSED */
int
smbfs_start(mp, flags, p)
struct mount *mp;
int flags;
struct proc *p;
{
SMBVDEBUG("flags=%04x\n", flags);
return 0;
}
/*
* Do operations associated with quotas, not supported
*/
/* ARGSUSED */
int
smbfs_quotactl(mp, cmd, uid, arg, p)
struct mount *mp;
int cmd;
uid_t uid;
caddr_t arg;
struct proc *p;
{
SMBVDEBUG("return EOPNOTSUPP\n");
return EOPNOTSUPP;
}
/*ARGSUSED*/
void
smbfs_init(/* struct vfsconf *vfsp */void)
{
#ifndef NetBSD
#ifndef SMP
int name[2];
int olen, ncpu, plen, error;
name[0] = CTL_HW;
name[1] = HW_NCPU;
error = kernel_sysctl(curproc, name, 2, &ncpu, &olen, NULL, 0, &plen);
if (error == 0 && ncpu > 1)
printf("warning: smbfs module compiled without SMP support.");
#endif
#endif
SMBVDEBUG("\n");
#ifdef SMBFS_USEZONE
smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1);
#endif
smbfs_hash_init();
smbfs_pbuf_freecnt = nswbuf / 2 + 1;
SMBVDEBUG("done.\n");
/* return 0; */
}
/*ARGSUSED*/
#ifndef NetBSD
int
smbfs_uninit(struct vfsconf *vfsp)
{
smbfs_hash_free();
SMBVDEBUG("done.\n");
return 0;
}
#else
void
smbfs_uninit(void)
{
smbfs_hash_free();
SMBVDEBUG("done.\n");
}
#endif
/*
* smbfs_statfs call
*/
int
smbfs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p)
{
struct smbmount *smp = VFSTOSMBFS(mp);
struct smbnode *np = smp->sm_root;
struct smb_share *ssp = smp->sm_share;
struct smb_cred scred;
int error = 0;
SMBVDEBUG("\n");
if (np == NULL)
return EINVAL;
sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
/* sbp->f_spare2 = 0; */ /* placeholder */
smb_makescred(&scred, p, p->p_ucred);
if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0)
error = smbfs_smb_statfs2(ssp, sbp, &scred);
else
error = smbfs_smb_statfs(ssp, sbp, &scred);
if (error)
return error;
sbp->f_flags = 0; /* copy of mount exported flags */
if (sbp != &mp->mnt_stat) {
sbp->f_fsid = mp->mnt_stat.f_fsid; /* file system id */
sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */
sbp->f_type = 0/* mp->mnt_vfc->vfc_typenum */; /* type of filesystem */
bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
}
#ifndef NetBSD
strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
#else
strncpy(sbp->f_fstypename, MOUNT_SMBFS, MFSNAMELEN-1);
#endif
return 0;
}
/*
* Flush out the buffer cache
*/
/* ARGSUSED */
int
smbfs_sync(mp, waitfor, cred, p)
struct mount *mp;
int waitfor;
struct ucred *cred;
struct proc *p;
{
register struct vnode *vp;
int error, allerror = 0;
/*
* Force stale buffer cache information to be flushed.
*/
SMBVDEBUG("\n");
loop:
for (vp = mp->mnt_vnodelist.lh_first;
vp != NULL;
vp = vp->v_mntvnodes.le_next) {
/*
* 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;
#ifndef NetBSD
#ifndef FB_RELENG3
if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
#else
if (VOP_ISLOCKED(vp) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
#endif
waitfor == MNT_LAZY)
#else
if (VOP_ISLOCKED(vp) || vp->v_dirtyblkhd.lh_first == NULL)
#endif
continue;
if (vget(vp, LK_EXCLUSIVE/* , p */))
goto loop;
error = VOP_FSYNC(vp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0, p);
if (error)
allerror = error;
vput(vp);
}
return (allerror);
}
#if __FreeBSD_version < 400009
/*
* smbfs flat namespace lookup. Unsupported.
*/
/* ARGSUSED */
int smbfs_vget(mp, ino, vpp)
struct mount *mp;
ino_t ino;
struct vnode **vpp;
{
return (EOPNOTSUPP);
}
/* ARGSUSED */
int smbfs_fhtovp(mp, fhp, /* nam, */ vpp/* , exflagsp, credanonp */)
register struct mount *mp;
struct fid *fhp;
/* struct sockaddr *nam; */
struct vnode **vpp;
/* int *exflagsp; */
/* struct ucred **credanonp; */
{
return (EINVAL);
}
/*
* Vnode pointer to File handle, should never happen either
*/
/* ARGSUSED */
int
smbfs_vptofh(vp, fhp)
struct vnode *vp;
struct fid *fhp;
{
return (EINVAL);
}
#endif /* __FreeBSD_version < 400009 */
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