FreeBSD-5.3/sys/fs/smbfs/smbfs_vfsops.c
/*
* 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 1.26 2004/07/30 22:08:51 phk Exp $
*/
#include "opt_netsmb.h"
#ifndef NETSMB
#error "SMBFS requires option NETSMB"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/bio.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 <sys/module.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>
int smbfs_debuglevel = 0;
static int smbfs_version = SMBFS_VERSION;
#ifdef SMBFS_USEZONE
#include <vm/vm.h>
#include <vm/vm_extern.h>
vm_zone_t smbfsmount_zone;
#endif
SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS filesystem");
SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
static vfs_init_t smbfs_init;
static vfs_uninit_t smbfs_uninit;
static vfs_omount_t smbfs_omount;
static vfs_start_t smbfs_start;
static vfs_root_t smbfs_root;
static vfs_quotactl_t smbfs_quotactl;
static vfs_statfs_t smbfs_statfs;
static vfs_unmount_t smbfs_unmount;
static struct vfsops smbfs_vfsops = {
.vfs_init = smbfs_init,
.vfs_omount = smbfs_omount,
.vfs_quotactl = smbfs_quotactl,
.vfs_root = smbfs_root,
.vfs_start = smbfs_start,
.vfs_statfs = smbfs_statfs,
.vfs_sync = vfs_stdsync,
.vfs_uninit = smbfs_uninit,
.vfs_unmount = smbfs_unmount,
};
VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
MODULE_DEPEND(smbfs, libiconv, 1, 1, 2);
MODULE_DEPEND(smbfs, libmchain, 1, 1, 1);
int smbfs_pbuf_freecnt = -1; /* start out unlimited */
static int
smbfs_omount(struct mount *mp, char *path, caddr_t data, struct thread *td)
{
struct smbfs_args args; /* will hold data from mount request */
struct smbmount *smp = NULL;
struct smb_vc *vcp;
struct smb_share *ssp = NULL;
struct vnode *vp;
struct smb_cred scred;
int error;
char *pc, *pe;
if (data == NULL) {
printf("missing data argument\n");
return EINVAL;
}
if (mp->mnt_flag & MNT_UPDATE) {
printf("MNT_UPDATE not implemented");
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, td, td->td_ucred);
error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp);
if (error) {
printf("invalid device handle %d (%d)\n", args.dev, error);
return error;
}
vcp = SSTOVC(ssp);
smb_share_unlock(ssp, 0, td);
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_WAITOK|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_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen);
if (smp->sm_hash == NULL)
goto bad;
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;
/* simple_lock_init(&smp->sm_npslock);*/
pc = mp->mnt_stat.f_mntfromname;
pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
bzero(pc, MNAMELEN);
*pc++ = '/';
*pc++ = '/';
pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
if (pc < pe-1) {
*(pc++) = '@';
pc = index(strncpy(pc, vcp->vc_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';
vfs_getnewfsid(mp);
error = smbfs_root(mp, &vp, td);
if (error)
goto bad;
VOP_UNLOCK(vp, 0, td);
SMBVDEBUG("root.v_usecount = %d\n", vrefcnt(vp));
#ifdef DIAGNOSTICS
SMBERROR("mp=%p\n", mp);
#endif
return error;
bad:
if (smp) {
if (smp->sm_hash)
free(smp->sm_hash, M_SMBFSHASH);
lockdestroy(&smp->sm_hashlock);
#ifdef SMBFS_USEZONE
zfree(smbfsmount_zone, smp);
#else
free(smp, M_SMBFSDATA);
#endif
}
if (ssp)
smb_share_put(ssp, &scred);
return error;
}
/* Unmount the filesystem described by mp. */
static int
smbfs_unmount(struct mount *mp, int mntflags, struct thread *td)
{
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;
/*
* Keep trying to flush the vnode list for the mount while
* some are still busy and we are making progress towards
* making them not busy. This is needed because smbfs vnodes
* reference their parent directory but may appear after their
* parent in the list; one pass over the vnode list is not
* sufficient in this case.
*/
do {
smp->sm_didrele = 0;
/* There is 1 extra root vnode reference from smbfs_mount(). */
error = vflush(mp, 1, flags, td);
} while (error == EBUSY && smp->sm_didrele != 0);
if (error)
return error;
smb_makescred(&scred, td, td->td_ucred);
smb_share_put(smp->sm_share, &scred);
mp->mnt_data = (qaddr_t)0;
if (smp->sm_hash)
free(smp->sm_hash, M_SMBFSHASH);
lockdestroy(&smp->sm_hashlock);
#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
*/
static int
smbfs_root(struct mount *mp, struct vnode **vpp, struct thread *td)
{
struct smbmount *smp = VFSTOSMBFS(mp);
struct vnode *vp;
struct smbnode *np;
struct smbfattr fattr;
struct ucred *cred = td->td_ucred;
struct smb_cred scred;
int error;
if (smp == NULL) {
SMBERROR("smp == NULL (bug in umount)\n");
return EINVAL;
}
if (smp->sm_root) {
*vpp = SMBTOV(smp->sm_root);
return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, td);
}
smb_makescred(&scred, td, 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;
ASSERT_VOP_LOCKED(vp, "smbfs_root");
vp->v_vflag |= VV_ROOT;
np = VTOSMB(vp);
smp->sm_root = np;
*vpp = vp;
return 0;
}
/*
* Vfs start routine, a no-op.
*/
/* ARGSUSED */
static int
smbfs_start(mp, flags, td)
struct mount *mp;
int flags;
struct thread *td;
{
SMBVDEBUG("flags=%04x\n", flags);
return 0;
}
/*
* Do operations associated with quotas, not supported
*/
/* ARGSUSED */
static int
smbfs_quotactl(mp, cmd, uid, arg, td)
struct mount *mp;
int cmd;
uid_t uid;
caddr_t arg;
struct thread *td;
{
SMBVDEBUG("return EOPNOTSUPP\n");
return EOPNOTSUPP;
}
/*ARGSUSED*/
int
smbfs_init(struct vfsconf *vfsp)
{
#ifdef SMBFS_USEZONE
smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1);
#endif
smbfs_pbuf_freecnt = nswbuf / 2 + 1;
SMBVDEBUG("done.\n");
return 0;
}
/*ARGSUSED*/
int
smbfs_uninit(struct vfsconf *vfsp)
{
SMBVDEBUG("done.\n");
return 0;
}
/*
* smbfs_statfs call
*/
int
smbfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
{
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;
if (np == NULL)
return EINVAL;
sbp->f_iosize = SSTOVC(ssp)->vc_txmax; /* optimal transfer block size */
smb_makescred(&scred, td, td->td_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; /* filesystem id */
sbp->f_owner = mp->mnt_stat.f_owner; /* user that mounted the filesystem */
sbp->f_type = 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);
}
strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
return 0;
}