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NetBSD/sys/fs/smbfs/smbfs_vfsops.c

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/* $NetBSD: smbfs_vfsops.c,v 1.32 2003/12/04 19:38:23 atatat Exp $ */
/*
* Copyright (c) 2000-2001, 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.
*
* FreeBSD: src/sys/fs/smbfs/smbfs_vfsops.c,v 1.5 2001/12/13 13:08:34 sheldonh Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: smbfs_vfsops.c,v 1.32 2003/12/04 19:38:23 atatat Exp $");
#ifdef _KERNEL_OPT
#include "opt_quota.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/vnode.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/malloc.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_dev.h>
#include <fs/smbfs/smbfs.h>
#include <fs/smbfs/smbfs_node.h>
#include <fs/smbfs/smbfs_subr.h>
#ifndef __NetBSD__
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, "");
#else
SYSCTL_SETUP(sysctl_vfs_samba_setup, "sysctl vfs.samba subtree setup")
{
struct sysctlnode *smb = NULL;
sysctl_createv(SYSCTL_PERMANENT,
CTLTYPE_NODE, "vfs", NULL,
NULL, 0, NULL, 0,
CTL_VFS, CTL_EOL);
sysctl_createv(SYSCTL_PERMANENT,
CTLTYPE_NODE, "samba", &smb,
NULL, 0, NULL, 0,
CTL_VFS, CTL_CREATE);
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_IMMEDIATE,
CTLTYPE_INT, "version", NULL,
NULL, SMBFS_VERSION, NULL, 0,
CTL_VFS, smb->sysctl_num, CTL_CREATE);
}
#endif
static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
int smbfs_mount(struct mount *, const char *, void *,
struct nameidata *, struct proc *);
int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct proc *);
int smbfs_root(struct mount *, struct vnode **);
static int smbfs_setroot(struct mount *);
int smbfs_start(struct mount *, int, struct proc *);
int smbfs_statfs(struct mount *, struct statfs *, struct proc *);
int smbfs_sync(struct mount *, int, struct ucred *, struct proc *);
int smbfs_unmount(struct mount *, int, struct proc *);
void smbfs_init(void);
void smbfs_reinit(void);
void smbfs_done(void);
int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp);
int smbfs_fhtovp(struct mount *, struct fid *, struct vnode **);
int smbfs_vptofh(struct vnode *, struct fid *);
extern struct pool smbfs_node_pool;
extern struct vnodeopv_desc smbfs_vnodeop_opv_desc;
static const 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,
smbfs_reinit,
smbfs_done,
NULL,
(int (*) (void)) eopnotsupp, /* mountroot */
(int (*) (struct mount *, struct mbuf *, int *,
struct ucred **)) eopnotsupp, /* checkexp */
smbfs_vnodeopv_descs,
};
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_vc *vcp;
struct smb_share *ssp = NULL;
struct smb_cred scred;
int error;
if (mp->mnt_flag & MNT_GETARGS) {
smp = VFSTOSMBFS(mp);
if (smp == NULL)
return EIO;
return copyout(&smp->sm_args, data, sizeof(smp->sm_args));
}
if (mp->mnt_flag & MNT_UPDATE)
return EOPNOTSUPP;
error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args));
if (error)
return error;
if (args.version != SMBFS_VERSION) {
#ifdef SMB_VNODE_DEBUG
printf("mount version mismatch: kernel=%d, mount=%d\n",
SMBFS_VERSION, args.version);
#endif
return EINVAL;
}
smb_makescred(&scred, p, p->p_ucred);
error = smb_dev2share(args.dev_fd, SMBM_EXEC, &scred, &ssp);
if (error)
return error;
smb_share_unlock(ssp, 0); /* keep ref, but unlock */
vcp = SSTOVC(ssp);
mp->mnt_stat.f_iosize = vcp->vc_txmax;
MALLOC(smp, struct smbmount *, sizeof(*smp), M_SMBFSDATA, M_WAITOK);
memset(smp, 0, sizeof(*smp));
mp->mnt_data = smp;
smp->sm_hash = hashinit(desiredvnodes, HASH_LIST,
M_SMBFSHASH, M_WAITOK, &smp->sm_hashlen);
lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0);
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;
error = set_statfs_info(path, UIO_USERSPACE, NULL, UIO_USERSPACE,
mp, p);
if (error)
goto bad;
memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN);
snprintf(mp->mnt_stat.f_mntfromname, MNAMELEN,
"//%s@%s/%s", vcp->vc_username, vcp->vc_srvname, ssp->ss_name);
vfs_getnewfsid(mp);
return (0);
bad:
if (smp) {
if (smp->sm_hash)
free(smp->sm_hash, M_SMBFSHASH);
#ifdef __NetBSD__
lockmgr(&smp->sm_hashlock, LK_DRAIN, NULL);
#else
lockdestroy(&smp->sm_hashlock);
#endif
FREE(smp, M_SMBFSDATA);
}
if (ssp) {
smb_share_lock(smp->sm_share, 0);
smb_share_put(ssp, &scred);
}
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 smb_cred scred;
int error, flags;
SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
flags = 0;
if (mntflags & MNT_FORCE)
flags |= FORCECLOSE;
#ifdef QUOTA
#endif
/* Drop the extra reference to root vnode. */
if (smp->sm_root) {
vrele(SMBTOV(smp->sm_root));
smp->sm_root = NULL;
}
/* Flush all vnodes. */
if ((error = vflush(mp, NULLVP, flags)) != 0)
return error;
smb_makescred(&scred, p, p->p_ucred);
smb_share_lock(smp->sm_share, 0);
smb_share_put(smp->sm_share, &scred);
mp->mnt_data = NULL;
free(smp->sm_hash, M_SMBFSHASH);
#ifdef __NetBSD__
lockmgr(&smp->sm_hashlock, LK_DRAIN, NULL);
#else
lockdestroy(&smp->sm_hashlock);
#endif
FREE(smp, M_SMBFSDATA);
return error;
}
/*
* Get root vnode of the smbfs filesystem, and store it in sm_root.
*/
static int
smbfs_setroot(struct mount *mp)
{
struct smbmount *smp = VFSTOSMBFS(mp);
struct vnode *vp;
struct smbfattr fattr;
struct proc *p = curproc;
struct ucred *cred = p->p_ucred;
struct smb_cred scred;
int error;
KASSERT(smp->sm_root == NULL);
smb_makescred(&scred, p, cred);
error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred);
if (error)
return error;
error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp);
if (error)
return error;
/*
* Someone might have already set sm_root while we slept
* in smb_lookup or malloc/getnewvnode.
*/
if (smp->sm_root)
vput(vp);
else {
vp->v_flag |= VROOT;
smp->sm_root = VTOSMB(vp);
/* Keep reference, but unlock */
VOP_UNLOCK(vp, 0);
}
return (0);
}
/*
* Return locked root vnode of a filesystem.
*/
int
smbfs_root(struct mount *mp, struct vnode **vpp)
{
struct smbmount *smp = VFSTOSMBFS(mp);
if (__predict_false(!smp->sm_root)) {
int error = smbfs_setroot(mp);
if (error)
return (error);
/* fallthrough */
}
KASSERT(smp->sm_root != NULL && SMBTOV(smp->sm_root) != NULL);
*vpp = SMBTOV(smp->sm_root);
return vget(*vpp, LK_EXCLUSIVE | LK_RETRY);
}
/*
* Make a filesystem operational.
* Nothing to do at the moment.
*/
/* 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;
}
void
smbfs_init(void)
{
pool_init(&smbfs_node_pool, sizeof(struct smbnode), 0, 0, 0,
"smbfsnopl", &pool_allocator_nointr);
#ifdef _LKM
/* Need explicit attach if LKM */
malloc_type_attach(M_SMBNODENAME);
malloc_type_attach(M_SMBFSDATA);
malloc_type_attach(M_SMBFSHASH);
#endif
SMBVDEBUG("init.\n");
}
void
smbfs_reinit(void)
{
SMBVDEBUG("reinit.\n");
}
void
smbfs_done(void)
{
pool_destroy(&smbfs_node_pool);
#ifdef _LKM
/* Need explicit detach if LKM */
malloc_type_detach(M_SMBNODENAME);
malloc_type_detach(M_SMBFSDATA);
malloc_type_detach(M_SMBFSHASH);
#endif
SMBVDEBUG("done.\n");
}
/*
* smbfs_statfs call
*/
int
smbfs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p)
{
struct smbmount *smp = VFSTOSMBFS(mp);
struct smb_share *ssp = smp->sm_share;
struct smb_cred scred;
int error = 0;
sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
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 */
sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */
sbp->f_type = 0;
copy_statfs_info(sbp, mp);
return 0;
}
/*
* Flush out the buffer cache
*/
int
smbfs_sync(mp, waitfor, cred, p)
struct mount *mp;
int waitfor;
struct ucred *cred;
struct proc *p;
{
struct vnode *vp, *nvp;
struct smbnode *np;
int error, allerror = 0;
/*
* Force stale buffer cache information to be flushed.
*/
simple_lock(&mntvnode_slock);
loop:
for (vp = LIST_FIRST(&mp->mnt_vnodelist); vp != NULL; vp = nvp) {
/*
* 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;
simple_lock(&vp->v_interlock);
nvp = LIST_NEXT(vp, v_mntvnodes);
np = VTOSMB(vp);
if ((vp->v_type == VNON || (np->n_flag & NMODIFIED) == 0) &&
LIST_EMPTY(&vp->v_dirtyblkhd) &&
vp->v_uobj.uo_npages == 0) {
simple_unlock(&vp->v_interlock);
continue;
}
simple_unlock(&mntvnode_slock);
error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK);
if (error) {
simple_lock(&mntvnode_slock);
if (error == ENOENT)
goto loop;
continue;
}
error = VOP_FSYNC(vp, cred,
waitfor == MNT_WAIT ? FSYNC_WAIT : 0, 0, 0, p);
if (error)
allerror = error;
vput(vp);
simple_lock(&mntvnode_slock);
}
simple_unlock(&mntvnode_slock);
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, vpp)
struct mount *mp;
struct fid *fhp;
struct vnode **vpp;
{
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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