/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * 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.
 *
 * 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/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/fcntl.h>
#include <sys/mount.h>
#include <sys/unistd.h>
#include <sys/vnode.h>
#include <sys/limits.h>
#include <sys/lockf.h>
#include <sys/stat.h>

#include <vm/vm.h>
#include <vm/vm_extern.h>

#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>

#include <fs/smbfs/smbfs.h>
#include <fs/smbfs/smbfs_node.h>
#include <fs/smbfs/smbfs_subr.h>

/*
 * Prototypes for SMBFS vnode operations
 */
static vop_create_t     smbfs_create;
static vop_mknod_t      smbfs_mknod;
static vop_open_t       smbfs_open;
static vop_close_t      smbfs_close;
static vop_access_t     smbfs_access;
static vop_getattr_t    smbfs_getattr;
static vop_setattr_t    smbfs_setattr;
static vop_read_t       smbfs_read;
static vop_write_t      smbfs_write;
static vop_fsync_t      smbfs_fsync;
static vop_remove_t     smbfs_remove;
static vop_link_t       smbfs_link;
static vop_lookup_t     smbfs_lookup;
static vop_rename_t     smbfs_rename;
static vop_mkdir_t      smbfs_mkdir;
static vop_rmdir_t      smbfs_rmdir;
static vop_symlink_t    smbfs_symlink;
static vop_readdir_t    smbfs_readdir;
static vop_strategy_t   smbfs_strategy;
static vop_print_t      smbfs_print;
static vop_pathconf_t   smbfs_pathconf;
static vop_advlock_t    smbfs_advlock;
static vop_getextattr_t smbfs_getextattr;

struct vop_vector smbfs_vnodeops = {
        .vop_default =          &default_vnodeops,

        .vop_access =           smbfs_access,
        .vop_advlock =          smbfs_advlock,
        .vop_close =            smbfs_close,
        .vop_create =           smbfs_create,
        .vop_fsync =            smbfs_fsync,
        .vop_getattr =          smbfs_getattr,
        .vop_getextattr =       smbfs_getextattr,
        .vop_getpages =         smbfs_getpages,
        .vop_inactive =         smbfs_inactive,
        .vop_ioctl =            smbfs_ioctl,
        .vop_link =             smbfs_link,
        .vop_lookup =           smbfs_lookup,
        .vop_mkdir =            smbfs_mkdir,
        .vop_mknod =            smbfs_mknod,
        .vop_open =             smbfs_open,
        .vop_pathconf =         smbfs_pathconf,
        .vop_print =            smbfs_print,
        .vop_putpages =         smbfs_putpages,
        .vop_read =             smbfs_read,
        .vop_readdir =          smbfs_readdir,
        .vop_reclaim =          smbfs_reclaim,
        .vop_remove =           smbfs_remove,
        .vop_rename =           smbfs_rename,
        .vop_rmdir =            smbfs_rmdir,
        .vop_setattr =          smbfs_setattr,
/*      .vop_setextattr =       smbfs_setextattr,*/
        .vop_strategy =         smbfs_strategy,
        .vop_symlink =          smbfs_symlink,
        .vop_write =            smbfs_write,
};
VFS_VOP_VECTOR_REGISTER(smbfs_vnodeops);

static int
smbfs_access(struct vop_access_args *ap)
{
        struct vnode *vp = ap->a_vp;
        accmode_t accmode = ap->a_accmode;
        mode_t mpmode;
        struct smbmount *smp = VTOSMBFS(vp);

        SMBVDEBUG("\n");
        if ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
                switch (vp->v_type) {
                    case VREG: case VDIR: case VLNK:
                        return EROFS;
                    default:
                        break;
                }
        }
        mpmode = vp->v_type == VREG ? smp->sm_file_mode : smp->sm_dir_mode;
        return (vaccess(vp->v_type, mpmode, smp->sm_uid,
            smp->sm_gid, ap->a_accmode, ap->a_cred));
}

/* ARGSUSED */
static int
smbfs_open(struct vop_open_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct smbnode *np = VTOSMB(vp);
        struct smb_cred *scred;
        struct vattr vattr;
        int mode = ap->a_mode;
        int error, accmode;

        SMBVDEBUG("%s,%d\n", np->n_name, (np->n_flag & NOPEN) != 0);
        if (vp->v_type != VREG && vp->v_type != VDIR) { 
                SMBFSERR("open eacces vtype=%d\n", vp->v_type);
                return EACCES;
        }
        if (vp->v_type == VDIR) {
                np->n_flag |= NOPEN;
                return 0;
        }
        if (np->n_flag & NMODIFIED) {
                if ((error = smbfs_vinvalbuf(vp, ap->a_td)) == EINTR)
                        return error;
                smbfs_attr_cacheremove(vp);
                error = VOP_GETATTR(vp, &vattr, ap->a_cred);
                if (error)
                        return error;
                np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
        } else {
                error = VOP_GETATTR(vp, &vattr, ap->a_cred);
                if (error)
                        return error;
                if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
                        error = smbfs_vinvalbuf(vp, ap->a_td);
                        if (error == EINTR)
                                return error;
                        np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
                }
        }
        if ((np->n_flag & NOPEN) != 0)
                return 0;
        /*
         * Use DENYNONE to give unixy semantics of permitting
         * everything not forbidden by permissions.  Ie denial
         * is up to server with clients/openers needing to use
         * advisory locks for further control.
         */
        accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
        if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
                accmode = SMB_SM_DENYNONE|SMB_AM_OPENRW;
        scred = smbfs_malloc_scred();
        smb_makescred(scred, ap->a_td, ap->a_cred);
        error = smbfs_smb_open(np, accmode, scred);
        if (error) {
                if (mode & FWRITE)
                        return EACCES;
                else if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
                        accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
                        error = smbfs_smb_open(np, accmode, scred);
                }
        }
        if (error == 0) {
                np->n_flag |= NOPEN;
                vnode_create_vobject(ap->a_vp, vattr.va_size, ap->a_td);
        }
        smbfs_attr_cacheremove(vp);
        smbfs_free_scred(scred);
        return error;
}

static int
smbfs_close(struct vop_close_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct thread *td = ap->a_td;
        struct smbnode *np = VTOSMB(vp);
        struct smb_cred *scred;

        if (vp->v_type == VDIR && (np->n_flag & NOPEN) != 0 &&
            np->n_dirseq != NULL) {
                scred = smbfs_malloc_scred();
                smb_makescred(scred, td, ap->a_cred);
                smbfs_findclose(np->n_dirseq, scred);
                smbfs_free_scred(scred);
                np->n_dirseq = NULL;
        }
        return 0;
}

/*
 * smbfs_getattr call from vfs.
 */
static int
smbfs_getattr(struct vop_getattr_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct smbnode *np = VTOSMB(vp);
        struct vattr *va=ap->a_vap;
        struct smbfattr fattr;
        struct smb_cred *scred;
        u_quad_t oldsize;
        int error;

        SMBVDEBUG("%lx: '%s' %d\n", (long)vp, np->n_name, (vp->v_vflag & VV_ROOT) != 0);
        error = smbfs_attr_cachelookup(vp, va);
        if (!error)
                return 0;
        SMBVDEBUG("not in the cache\n");
        scred = smbfs_malloc_scred();
        smb_makescred(scred, curthread, ap->a_cred);
        oldsize = np->n_size;
        error = smbfs_smb_lookup(np, NULL, 0, &fattr, scred);
        if (error) {
                SMBVDEBUG("error %d\n", error);
                smbfs_free_scred(scred);
                return error;
        }
        smbfs_attr_cacheenter(vp, &fattr);
        smbfs_attr_cachelookup(vp, va);
        if (np->n_flag & NOPEN)
                np->n_size = oldsize;
        smbfs_free_scred(scred);
        return 0;
}

static int
smbfs_setattr(struct vop_setattr_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct smbnode *np = VTOSMB(vp);
        struct vattr *vap = ap->a_vap;
        struct timespec *mtime, *atime;
        struct smb_cred *scred;
        struct smb_share *ssp = np->n_mount->sm_share;
        struct smb_vc *vcp = SSTOVC(ssp);
        struct thread *td = curthread;
        u_quad_t tsize = 0;
        int isreadonly, doclose, error = 0;
        int old_n_dosattr;

        SMBVDEBUG("\n");
        isreadonly = (vp->v_mount->mnt_flag & MNT_RDONLY);
        /*
         * Disallow write attempts if the filesystem is mounted read-only.
         */
        if ((vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL || 
             vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
             vap->va_mode != (mode_t)VNOVAL || vap->va_flags != VNOVAL) &&
             isreadonly)
                return EROFS;

        /*
         * We only support setting four flags.  Don't allow setting others.
         *
         * We map UF_READONLY to SMB_FA_RDONLY, unlike the MacOS X version
         * of this code, which maps both UF_IMMUTABLE AND SF_IMMUTABLE to
         * SMB_FA_RDONLY.  The immutable flags have different semantics
         * than readonly, which is the reason for the difference.
         */
        if (vap->va_flags != VNOVAL) {
                if (vap->va_flags & ~(UF_HIDDEN|UF_SYSTEM|UF_ARCHIVE|
                                      UF_READONLY))
                        return EINVAL;
        }

        scred = smbfs_malloc_scred();
        smb_makescred(scred, td, ap->a_cred);
        if (vap->va_size != VNOVAL) {
                switch (vp->v_type) {
                    case VDIR:
                        error = EISDIR;
                        goto out;
                    case VREG:
                        break;
                    default:
                        error = EINVAL;
                        goto out;
                }
                if (isreadonly) {
                        error = EROFS;
                        goto out;
                }
                doclose = 0;
                vnode_pager_setsize(vp, (u_long)vap->va_size);
                tsize = np->n_size;
                np->n_size = vap->va_size;
                if ((np->n_flag & NOPEN) == 0) {
                        error = smbfs_smb_open(np,
                                               SMB_SM_DENYNONE|SMB_AM_OPENRW,
                                               scred);
                        if (error == 0)
                                doclose = 1;
                }
                if (error == 0)
                        error = smbfs_smb_setfsize(np,
                            (int64_t)vap->va_size, scred);
                if (doclose)
                        smbfs_smb_close(ssp, np->n_fid, NULL, scred);
                if (error) {
                        np->n_size = tsize;
                        vnode_pager_setsize(vp, (u_long)tsize);
                        goto out;
                }
        }
        if ((vap->va_flags != VNOVAL) || (vap->va_mode != (mode_t)VNOVAL)) {
                old_n_dosattr = np->n_dosattr;

                if (vap->va_mode != (mode_t)VNOVAL) {
                        if (vap->va_mode & S_IWUSR)
                                np->n_dosattr &= ~SMB_FA_RDONLY;
                        else
                                np->n_dosattr |= SMB_FA_RDONLY;
                }

                if (vap->va_flags != VNOVAL) {
                        if (vap->va_flags & UF_HIDDEN)
                                np->n_dosattr |= SMB_FA_HIDDEN;
                        else
                                np->n_dosattr &= ~SMB_FA_HIDDEN;

                        if (vap->va_flags & UF_SYSTEM)
                                np->n_dosattr |= SMB_FA_SYSTEM;
                        else
                                np->n_dosattr &= ~SMB_FA_SYSTEM;

                        if (vap->va_flags & UF_ARCHIVE)
                                np->n_dosattr |= SMB_FA_ARCHIVE;
                        else
                                np->n_dosattr &= ~SMB_FA_ARCHIVE;

                        /*
                         * We only support setting the immutable / readonly
                         * bit for regular files.  According to comments in
                         * the MacOS X version of this code, supporting the
                         * readonly bit on directories doesn't do the same
                         * thing in Windows as in Unix.
                         */
                        if (vp->v_type == VREG) {
                                if (vap->va_flags & UF_READONLY)
                                        np->n_dosattr |= SMB_FA_RDONLY;
                                else
                                        np->n_dosattr &= ~SMB_FA_RDONLY;
                        }
                }

                if (np->n_dosattr != old_n_dosattr) {
                        error = smbfs_smb_setpattr(np, np->n_dosattr, NULL, scred);
                        if (error)
                                goto out;
                }
        }
        mtime = atime = NULL;
        if (vap->va_mtime.tv_sec != VNOVAL)
                mtime = &vap->va_mtime;
        if (vap->va_atime.tv_sec != VNOVAL)
                atime = &vap->va_atime;
        if (mtime != atime) {
                if (vap->va_vaflags & VA_UTIMES_NULL) {
                        error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
                        if (error)
                                error = VOP_ACCESS(vp, VWRITE, ap->a_cred, td);
                } else
                        error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
#if 0
                if (mtime == NULL)
                        mtime = &np->n_mtime;
                if (atime == NULL)
                        atime = &np->n_atime;
#endif
                /*
                 * If file is opened, then we can use handle based calls.
                 * If not, use path based ones.
                 */
                if ((np->n_flag & NOPEN) == 0) {
                        if (vcp->vc_flags & SMBV_WIN95) {
                                error = VOP_OPEN(vp, FWRITE, ap->a_cred, td,
                                    NULL);
                                if (!error) {
/*                                      error = smbfs_smb_setfattrNT(np, 0,
                                            mtime, atime, scred);
                                        VOP_GETATTR(vp, &vattr, ap->a_cred); */
                                        if (mtime)
                                                np->n_mtime = *mtime;
                                        VOP_CLOSE(vp, FWRITE, ap->a_cred, td);
                                }
                        } else if ((vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS)) {
                                error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
/*                              error = smbfs_smb_setpattrNT(np, 0, mtime, atime, scred);*/
                        } else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN2_0) {
                                error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
                        } else {
                                error = smbfs_smb_setpattr(np, 0, mtime, scred);
                        }
                } else {
                        if (vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS) {
                                error = smbfs_smb_setfattrNT(np, 0, mtime, atime, scred);
                        } else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN1_0) {
                                error = smbfs_smb_setftime(np, mtime, atime, scred);
                        } else {
                                /*
                                 * I have no idea how to handle this for core
                                 * level servers. The possible solution is to
                                 * update mtime after file is closed.
                                 */
                                 SMBERROR("can't update times on an opened file\n");
                        }
                }
        }
        /*
         * Invalidate attribute cache in case if server doesn't set
         * required attributes.
         */
        smbfs_attr_cacheremove(vp);     /* invalidate cache */
        VOP_GETATTR(vp, vap, ap->a_cred);
        np->n_mtime.tv_sec = vap->va_mtime.tv_sec;
out:
        smbfs_free_scred(scred);
        return error;
}
/*
 * smbfs_read call.
 */
static int
smbfs_read(struct vop_read_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct uio *uio = ap->a_uio;

        SMBVDEBUG("\n");
        if (vp->v_type != VREG && vp->v_type != VDIR)
                return EPERM;
        return smbfs_readvnode(vp, uio, ap->a_cred, NULL);
}

static int
smbfs_write(struct vop_write_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct uio *uio = ap->a_uio;

        SMBVDEBUG("%d,ofs=%jd,sz=%zd\n",vp->v_type, (intmax_t)uio->uio_offset, 
            uio->uio_resid);
        if (vp->v_type != VREG)
                return (EPERM);
        return smbfs_writevnode(vp, uio, ap->a_cred,ap->a_ioflag);
}
/*
 * smbfs_create call
 * Create a regular file. On entry the directory to contain the file being
 * created is locked.  We must release before we return. We must also free
 * the pathname buffer pointed at by cnp->cn_pnbuf, always on error.
 */
static int
smbfs_create(struct vop_create_args *ap)
{
        struct vnode *dvp = ap->a_dvp;
        struct vattr *vap = ap->a_vap;
        struct vnode **vpp=ap->a_vpp;
        struct componentname *cnp = ap->a_cnp;
        struct smbnode *dnp = VTOSMB(dvp);
        struct vnode *vp;
        struct vattr vattr;
        struct smbfattr fattr;
        struct smb_cred *scred;
        char *name = cnp->cn_nameptr;
        int nmlen = cnp->cn_namelen;
        int error;

        SMBVDEBUG("\n");
        *vpp = NULL;
        if (vap->va_type != VREG)
                return EOPNOTSUPP;
        if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
                return error;
        scred = smbfs_malloc_scred();
        smb_makescred(scred, curthread, cnp->cn_cred);

        error = smbfs_smb_create(dnp, name, nmlen, scred);
        if (error)
                goto out;
        error = smbfs_smb_lookup(dnp, name, nmlen, &fattr, scred);
        if (error)
                goto out;
        error = smbfs_nget(VTOVFS(dvp), dvp, name, nmlen, &fattr, &vp);
        if (error)
                goto out;
        *vpp = vp;
        if (cnp->cn_flags & MAKEENTRY)
                cache_enter(dvp, vp, cnp);
out:
        smbfs_free_scred(scred);
        return error;
}

static int
smbfs_remove(struct vop_remove_args *ap)
{
        struct vnode *vp = ap->a_vp;
/*      struct vnode *dvp = ap->a_dvp;*/
        struct componentname *cnp = ap->a_cnp;
        struct smbnode *np = VTOSMB(vp);
        struct smb_cred *scred;
        int error;

        if (vp->v_type == VDIR || (np->n_flag & NOPEN) != 0 || vrefcnt(vp) != 1)
                return EPERM;
        scred = smbfs_malloc_scred();
        smb_makescred(scred, curthread, cnp->cn_cred);
        error = smbfs_smb_delete(np, scred);
        if (error == 0)
                np->n_flag |= NGONE;
        cache_purge(vp);
        smbfs_free_scred(scred);
        return error;
}

/*
 * smbfs_file rename call
 */
static int
smbfs_rename(struct vop_rename_args *ap)
{
        struct vnode *fvp = ap->a_fvp;
        struct vnode *tvp = ap->a_tvp;
        struct vnode *fdvp = ap->a_fdvp;
        struct vnode *tdvp = ap->a_tdvp;
        struct componentname *tcnp = ap->a_tcnp;
/*      struct componentname *fcnp = ap->a_fcnp;*/
        struct smb_cred *scred;
#ifdef notnow
        u_int16_t flags = 6;
#endif
        int error=0;

        scred = NULL;
        /* Check for cross-device rename */
        if ((fvp->v_mount != tdvp->v_mount) ||
            (tvp && (fvp->v_mount != tvp->v_mount))) {
                error = EXDEV;
                goto out;
        }

        if (ap->a_flags != 0) {
                error = EOPNOTSUPP;
                goto out;
        }

        if (tvp && vrefcnt(tvp) > 1) {
                error = EBUSY;
                goto out;
        }
#ifdef notnow
        flags = 0x10;                   /* verify all writes */
#endif
        if (fvp->v_type == VDIR) {
#ifdef notnow
                flags |= 2;
#endif
        } else if (fvp->v_type == VREG) {
#ifdef notnow
                flags |= 1;
#endif
        } else {
                return EINVAL;
        }
        scred = smbfs_malloc_scred();
        smb_makescred(scred, curthread, tcnp->cn_cred);
        /*
         * It seems that Samba doesn't implement SMB_COM_MOVE call...
         */
#ifdef notnow
        if (SMB_DIALECT(SSTOCN(smp->sm_share)) >= SMB_DIALECT_LANMAN1_0) {
                error = smbfs_smb_move(VTOSMB(fvp), VTOSMB(tdvp),
                    tcnp->cn_nameptr, tcnp->cn_namelen, flags, scred);
        } else
#endif
        {
                /*
                 * We have to do the work atomicaly
                 */
                if (tvp && tvp != fvp) {
                        error = smbfs_smb_delete(VTOSMB(tvp), scred);
                        if (error)
                                goto out_cacherem;
                        VTOSMB(fvp)->n_flag |= NGONE;
                }
                error = smbfs_smb_rename(VTOSMB(fvp), VTOSMB(tdvp),
                    tcnp->cn_nameptr, tcnp->cn_namelen, scred);
        }

        if (fvp->v_type == VDIR) {
                if (tvp != NULL && tvp->v_type == VDIR)
                        cache_purge(tdvp);
                cache_purge(fdvp);
        }

out_cacherem:
        smbfs_attr_cacheremove(fdvp);
        smbfs_attr_cacheremove(tdvp);
out:
        smbfs_free_scred(scred);
        if (tdvp == tvp)
                vrele(tdvp);
        else
                vput(tdvp);
        if (tvp)
                vput(tvp);
        vrele(fdvp);
        vrele(fvp);
#ifdef possible_mistake
        vgone(fvp);
        if (tvp)
                vgone(tvp);
#endif
        return error;
}

/*
 * somtime it will come true...
 */
static int
smbfs_link(struct vop_link_args *ap)
{
        return EOPNOTSUPP;
}

/*
 * smbfs_symlink link create call.
 * Sometime it will be functional...
 */
static int
smbfs_symlink(struct vop_symlink_args *ap)
{
        return EOPNOTSUPP;
}

static int
smbfs_mknod(struct vop_mknod_args *ap)
{
        return EOPNOTSUPP;
}

static int
smbfs_mkdir(struct vop_mkdir_args *ap)
{
        struct vnode *dvp = ap->a_dvp;
/*      struct vattr *vap = ap->a_vap;*/
        struct vnode *vp;
        struct componentname *cnp = ap->a_cnp;
        struct smbnode *dnp = VTOSMB(dvp);
        struct vattr vattr;
        struct smb_cred *scred;
        struct smbfattr fattr;
        char *name = cnp->cn_nameptr;
        int len = cnp->cn_namelen;
        int error;

        if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) {
                return error;
        }
        if ((name[0] == '.') && ((len == 1) || ((len == 2) && (name[1] == '.'))))
                return EEXIST;
        scred = smbfs_malloc_scred();
        smb_makescred(scred, curthread, cnp->cn_cred);
        error = smbfs_smb_mkdir(dnp, name, len, scred);
        if (error)
                goto out;
        error = smbfs_smb_lookup(dnp, name, len, &fattr, scred);
        if (error)
                goto out;
        error = smbfs_nget(VTOVFS(dvp), dvp, name, len, &fattr, &vp);
        if (error)
                goto out;
        *ap->a_vpp = vp;
out:
        smbfs_free_scred(scred);
        return error;
}

/*
 * smbfs_remove directory call
 */
static int
smbfs_rmdir(struct vop_rmdir_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct vnode *dvp = ap->a_dvp;
        struct componentname *cnp = ap->a_cnp;
/*      struct smbmount *smp = VTOSMBFS(vp);*/
        struct smbnode *dnp = VTOSMB(dvp);
        struct smbnode *np = VTOSMB(vp);
        struct smb_cred *scred;
        int error;

        if (dvp == vp)
                return EINVAL;

        scred = smbfs_malloc_scred();
        smb_makescred(scred, curthread, cnp->cn_cred);
        error = smbfs_smb_rmdir(np, scred);
        if (error == 0)
                np->n_flag |= NGONE;
        dnp->n_flag |= NMODIFIED;
        smbfs_attr_cacheremove(dvp);
/*      cache_purge(dvp);*/
        cache_purge(vp);
        smbfs_free_scred(scred);
        return error;
}

/*
 * smbfs_readdir call
 */
static int
smbfs_readdir(struct vop_readdir_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct uio *uio = ap->a_uio;

        if (vp->v_type != VDIR)
                return (EPERM);
#ifdef notnow
        if (ap->a_ncookies) {
                printf("smbfs_readdir: no support for cookies now...");
                return (EOPNOTSUPP);
        }
#endif
        return (smbfs_readvnode(vp, uio, ap->a_cred, ap->a_eofflag));
}

/* ARGSUSED */
static int
smbfs_fsync(struct vop_fsync_args *ap)
{
/*      return (smb_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));*/
    return (0);
}

static
int smbfs_print(struct vop_print_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct smbnode *np = VTOSMB(vp);

        if (np == NULL) {
                printf("no smbnode data\n");
                return (0);
        }
        printf("\tname = %s, parent = %p, open = %d\n", np->n_name,
            np->n_parent ? np->n_parent : NULL, (np->n_flag & NOPEN) != 0);
        return (0);
}

static int
smbfs_pathconf(struct vop_pathconf_args *ap)
{
        struct smbmount *smp = VFSTOSMBFS(VTOVFS(ap->a_vp));
        struct smb_vc *vcp = SSTOVC(smp->sm_share);
        long *retval = ap->a_retval;
        int error = 0;

        switch (ap->a_name) {
            case _PC_FILESIZEBITS:
                if (vcp->vc_sopt.sv_caps & (SMB_CAP_LARGE_READX |
                    SMB_CAP_LARGE_WRITEX))
                    *retval = 64;
                else
                    *retval = 32;
                break;
            case _PC_NAME_MAX:
                *retval = (vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12;
                break;
            case _PC_PATH_MAX:
                *retval = 800;  /* XXX: a correct one ? */
                break;
            case _PC_NO_TRUNC:
                *retval = 1;
                break;
            case _PC_HAS_HIDDENSYSTEM:
                *retval = 1;
                break;
            default:
                error = vop_stdpathconf(ap);
        }
        return error;
}

static int
smbfs_strategy(struct vop_strategy_args *ap)
{
        struct buf *bp=ap->a_bp;
        struct ucred *cr;
        struct thread *td;

        SMBVDEBUG("\n");
        if (bp->b_flags & B_ASYNC)
                td = (struct thread *)0;
        else
                td = curthread; /* XXX */
        if (bp->b_iocmd == BIO_READ)
                cr = bp->b_rcred;
        else
                cr = bp->b_wcred;

        if ((bp->b_flags & B_ASYNC) == 0 )
                (void)smbfs_doio(ap->a_vp, bp, cr, td);
        return (0);
}

int
smbfs_ioctl(struct vop_ioctl_args *ap)
{
        return ENOTTY;
}

static char smbfs_atl[] = "rhsvda";
static int
smbfs_getextattr(struct vop_getextattr_args *ap)
/* {
        IN struct vnode *a_vp;
        IN char *a_name;
        INOUT struct uio *a_uio;
        IN struct ucred *a_cred;
        IN struct thread *a_td;
};
*/
{
        struct vnode *vp = ap->a_vp;
        struct thread *td = ap->a_td;
        struct ucred *cred = ap->a_cred;
        struct uio *uio = ap->a_uio;
        const char *name = ap->a_name;
        struct smbnode *np = VTOSMB(vp);
        struct vattr vattr;
        char buf[10];
        int i, attr, error;

        error = VOP_ACCESS(vp, VREAD, cred, td);
        if (error)
                return error;
        error = VOP_GETATTR(vp, &vattr, cred);
        if (error)
                return error;
        if (strcmp(name, "dosattr") == 0) {
                attr = np->n_dosattr;
                for (i = 0; i < 6; i++, attr >>= 1)
                        buf[i] = (attr & 1) ? smbfs_atl[i] : '-';
                buf[i] = 0;
                error = uiomove(buf, i, uio);
        } else
                error = EINVAL;
        return error;
}

/*
 * Since we expected to support F_GETLK (and SMB protocol has no such function),
 * it is necessary to use lf_advlock(). It would be nice if this function had
 * a callback mechanism because it will help to improve a level of consistency.
 */
int
smbfs_advlock(struct vop_advlock_args *ap)
{
        struct vnode *vp = ap->a_vp;
        struct smbnode *np = VTOSMB(vp);
        struct flock *fl = ap->a_fl;
        caddr_t id = (caddr_t)1 /* ap->a_id */;
/*      int flags = ap->a_flags;*/
        struct thread *td = curthread;
        struct smb_cred *scred;
        u_quad_t size;
        off_t start, end, oadd;
        int error, lkop;

        if (vp->v_type == VDIR) {
                /*
                 * SMB protocol have no support for directory locking.
                 * Although locks can be processed on local machine, I don't
                 * think that this is a good idea, because some programs
                 * can work wrong assuming directory is locked. So, we just
                 * return 'operation not supported
                 */
                 return EOPNOTSUPP;
        }
        size = np->n_size;
        switch (fl->l_whence) {
        case SEEK_SET:
        case SEEK_CUR:
                start = fl->l_start;
                break;

        case SEEK_END:
                if (size > OFF_MAX ||
                    (fl->l_start > 0 && size > OFF_MAX - fl->l_start))
                        return EOVERFLOW;
                start = size + fl->l_start;
                break;

        default:
                return EINVAL;
        }
        if (start < 0)
                return EINVAL;
        if (fl->l_len < 0) {
                if (start == 0)
                        return EINVAL;
                end = start - 1;
                start += fl->l_len;
                if (start < 0)
                        return EINVAL;
        } else if (fl->l_len == 0)
                end = -1;
        else {
                oadd = fl->l_len - 1;
                if (oadd > OFF_MAX - start)
                        return EOVERFLOW;
                end = start + oadd;
        }
        scred = smbfs_malloc_scred();
        smb_makescred(scred, td, td->td_ucred);
        switch (ap->a_op) {
            case F_SETLK:
                switch (fl->l_type) {
                    case F_WRLCK:
                        lkop = SMB_LOCK_EXCL;
                        break;
                    case F_RDLCK:
                        lkop = SMB_LOCK_SHARED;
                        break;
                    case F_UNLCK:
                        lkop = SMB_LOCK_RELEASE;
                        break;
                    default:
                        smbfs_free_scred(scred);
                        return EINVAL;
                }
                error = lf_advlock(ap, &vp->v_lockf, size);
                if (error)
                        break;
                lkop = SMB_LOCK_EXCL;
                error = smbfs_smb_lock(np, lkop, id, start, end, scred);
                if (error) {
                        int oldtype = fl->l_type;
                        fl->l_type = F_UNLCK;
                        ap->a_op = F_UNLCK;
                        lf_advlock(ap, &vp->v_lockf, size);
                        fl->l_type = oldtype;
                }
                break;
            case F_UNLCK:
                lf_advlock(ap, &vp->v_lockf, size);
                error = smbfs_smb_lock(np, SMB_LOCK_RELEASE, id, start, end, scred);
                break;
            case F_GETLK:
                error = lf_advlock(ap, &vp->v_lockf, size);
                break;
            default:
                smbfs_free_scred(scred);
                return EINVAL;
        }
        smbfs_free_scred(scred);
        return error;
}

static int
smbfs_pathcheck(struct smbmount *smp, const char *name, int nmlen, int nameiop)
{
        static const char *badchars = "*/:<>?";
        static const char *badchars83 = " +|,[]=;";
        const char *cp;
        int i, error;

        /*
         * Backslash characters, being a path delimiter, are prohibited
         * within a path component even for LOOKUP operations.
         */
        if (strchr(name, '\\') != NULL)
                return ENOENT;

        if (nameiop == LOOKUP)
                return 0;
        error = ENOENT;
        if (SMB_DIALECT(SSTOVC(smp->sm_share)) < SMB_DIALECT_LANMAN2_0) {
                /*
                 * Name should conform 8.3 format
                 */
                if (nmlen > 12)
                        return ENAMETOOLONG;
                cp = strchr(name, '.');
                if (cp == NULL)
                        return error;
                if (cp == name || (cp - name) > 8)
                        return error;
                cp = strchr(cp + 1, '.');
                if (cp != NULL)
                        return error;
                for (cp = name, i = 0; i < nmlen; i++, cp++)
                        if (strchr(badchars83, *cp) != NULL)
                                return error;
        }
        for (cp = name, i = 0; i < nmlen; i++, cp++)
                if (strchr(badchars, *cp) != NULL)
                        return error;
        return 0;
}

/*
 * Things go even weird without fixed inode numbers...
 */
int
smbfs_lookup(struct vop_lookup_args *ap)
{
        struct componentname *cnp = ap->a_cnp;
        struct thread *td = curthread;
        struct vnode *dvp = ap->a_dvp;
        struct vnode **vpp = ap->a_vpp;
        struct vnode *vp;
        struct smbmount *smp;
        struct mount *mp = dvp->v_mount;
        struct smbnode *dnp;
        struct smbfattr fattr, *fap;
        struct smb_cred *scred;
        char *name = cnp->cn_nameptr;
        uint64_t flags = cnp->cn_flags;
        int nameiop = cnp->cn_nameiop;
        int nmlen = cnp->cn_namelen;
        int error, islastcn, isdot;
        int killit;

        SMBVDEBUG("\n");
        if (dvp->v_type != VDIR)
                return ENOTDIR;
        if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) {
                SMBFSERR("invalid '..'\n");
                return EIO;
        }
        islastcn = flags & ISLASTCN;
        if (islastcn && (mp->mnt_flag & MNT_RDONLY) && (nameiop != LOOKUP))
                return EROFS;
        error = vn_dir_check_exec(dvp, cnp);
        if (error != 0)
                return error;
        smp = VFSTOSMBFS(mp);
        dnp = VTOSMB(dvp);
        isdot = (nmlen == 1 && name[0] == '.');

        error = smbfs_pathcheck(smp, cnp->cn_nameptr, cnp->cn_namelen, nameiop);

        if (error) 
                return ENOENT;

        error = cache_lookup(dvp, vpp, cnp, NULL, NULL);
        SMBVDEBUG("cache_lookup returned %d\n", error);
        if (error > 0)
                return error;
        if (error) {            /* name was found */
                struct vattr vattr;

                killit = 0;
                vp = *vpp;
                error = VOP_GETATTR(vp, &vattr, cnp->cn_cred);
                /*
                 * If the file type on the server is inconsistent
                 * with what it was when we created the vnode,
                 * kill the bogus vnode now and fall through to
                 * the code below to create a new one with the
                 * right type.
                 */
                if (error == 0 &&
                   ((vp->v_type == VDIR &&
                   (VTOSMB(vp)->n_dosattr & SMB_FA_DIR) == 0) ||
                   (vp->v_type == VREG &&
                   (VTOSMB(vp)->n_dosattr & SMB_FA_DIR) != 0)))
                   killit = 1;
                else if (error == 0
             /*    && vattr.va_ctime.tv_sec == VTOSMB(vp)->n_ctime*/) {
                     SMBVDEBUG("use cached vnode\n");
                     return (0);
                }
                cache_purge(vp);
                /*
                 * XXX This is not quite right, if '.' is
                 * inconsistent, we really need to start the lookup
                 * all over again.  Hopefully there is some other
                 * guarantee that prevents this case from happening.
                 */
                if (killit && vp != dvp)
                        vgone(vp);
                if (vp != dvp)
                        vput(vp);
                else
                        vrele(vp);
                *vpp = NULL;
        }
        /* 
         * entry is not in the cache or has been expired
         */
        error = 0;
        *vpp = NULL;
        scred = smbfs_malloc_scred();
        smb_makescred(scred, td, cnp->cn_cred);
        fap = &fattr;
        if (flags & ISDOTDOT) {
                /*
                 * In the DOTDOT case, don't go over-the-wire
                 * in order to request attributes. We already
                 * know it's a directory and subsequent call to
                 * smbfs_getattr() will restore consistency.
                 *
                 */
                SMBVDEBUG("smbfs_smb_lookup: dotdot\n");
        } else if (isdot) {
                error = smbfs_smb_lookup(dnp, NULL, 0, fap, scred);
                SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
        }
        else {
                error = smbfs_smb_lookup(dnp, name, nmlen, fap, scred);
                SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
        }
        if (error && error != ENOENT)
                goto out;
        if (error) {                    /* entry not found */
                /*
                 * Handle RENAME or CREATE case...
                 */
                if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
                        error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
                        if (error)
                                goto out;
                        error = EJUSTRETURN;
                        goto out;
                }
                error = ENOENT;
                goto out;
        }/* else {
                SMBVDEBUG("Found entry %s with id=%d\n", fap->entryName, fap->dirEntNum);
        }*/
        /*
         * handle DELETE case ...
         */
        if (nameiop == DELETE && islastcn) {    /* delete last component */
                error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
                if (error)
                        goto out;
                if (isdot) {
                        vref(dvp);
                        *vpp = dvp;
                        goto out;
                }
                error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
                if (error)
                        goto out;
                *vpp = vp;
                goto out;
        }
        if (nameiop == RENAME && islastcn) {
                error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
                if (error)
                        goto out;
                if (isdot) {
                        error = EISDIR;
                        goto out;
                }
                error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
                if (error)
                        goto out;
                *vpp = vp;
                goto out;
        }
        if (flags & ISDOTDOT) {
                mp = dvp->v_mount;
                error = vfs_busy(mp, MBF_NOWAIT);
                if (error != 0) {
                        vfs_ref(mp);
                        VOP_UNLOCK(dvp);
                        error = vfs_busy(mp, 0);
                        vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
                        vfs_rel(mp);
                        if (error) {
                                error = ENOENT;
                                goto out;
                        }
                        if (VN_IS_DOOMED(dvp)) {
                                vfs_unbusy(mp);
                                error = ENOENT;
                                goto out;
                        }
                }       
                VOP_UNLOCK(dvp);
                error = smbfs_nget(mp, dvp, name, nmlen, NULL, &vp);
                vfs_unbusy(mp);
                vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
                if (VN_IS_DOOMED(dvp)) {
                        if (error == 0)
                                vput(vp);
                        error = ENOENT;
                }
                if (error)
                        goto out;
                *vpp = vp;
        } else if (isdot) {
                vref(dvp);
                *vpp = dvp;
        } else {
                error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
                if (error)
                        goto out;
                *vpp = vp;
                SMBVDEBUG("lookup: getnewvp!\n");
        }
        if ((cnp->cn_flags & MAKEENTRY)/* && !islastcn*/) {
/*              VTOSMB(*vpp)->n_ctime = VTOSMB(*vpp)->n_vattr.va_ctime.tv_sec;*/
                cache_enter(dvp, *vpp, cnp);
        }
out:
        smbfs_free_scred(scred);
        return (error);
}