smbclnt/smbfs/smbfs_subr.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.
 *
 * $Id: smbfs_subr.c,v 1.18 2005/02/02 00:22:23 lindak Exp $
 */

/*
 * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <sys/vnode.h>
#include <sys/sunddi.h>

#include <netsmb/smb_osdep.h>

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

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

/*
 * In the Darwin code, this function used to compute the full path
 * by following the chain of n_parent pointers back to the root.
 * In the Solaris port we found the n_parent pointers inconvenient
 * because they hold parent nodes busy.  We now keep the full path
 * in every node, so this function need only marshall the directory
 * path, and (if provided) the separator and last component name.
 *
 * Note that this logic must match that in smbfs_getino
 */
int
smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *dnp,
    const char *name, int nmlen, u_int8_t sep)
{
    int caseopt = SMB_CS_NONE;
    int unicode = (SMB_UNICODE_STRINGS(vcp)) ? 1 : 0;
    int error;

    if (SMB_DIALECT(vcp) < SMB_DIALECT_LANMAN1_0)
        caseopt |= SMB_CS_UPPER;

    if (unicode) {
        error = mb_put_padbyte(mbp);
        if (error)
            return (error);
    }

    error = smb_put_dmem(mbp, vcp,
        dnp->n_rpath, dnp->n_rplen,
        caseopt, NULL);
    if (name) {
        /*
         * Special case at share root:
         * Don't put another slash.
         */
        if (dnp->n_rplen <= 1 && sep == '\\')
            sep = 0;
        /*
         * More special cases, now for XATTR:
         * Our "faked up" XATTR directories use a
         * full path name ending with ":" so as to
         * avoid conflicts with any real paths.
         * (It is not a valid CIFS path name.)
         * Therefore, when we're composing a full
         * path name from an XATTR directory, we
         * need to _ommit_ the ":" separator and
         * instead copy the one from the "fake"
         * parent node's path name.
         */
        if (dnp->n_flag & N_XATTR)
            sep = 0;

        if (sep) {
            /* Put the separator */
            if (unicode)
                error = mb_put_uint16le(mbp, sep);
            else
                error = mb_put_uint8(mbp, sep);
            if (error)
                return (error);
        }
        /* Put the name */
        error = smb_put_dmem(mbp, vcp,
            name, nmlen, caseopt, NULL);
        if (error)
            return (error);
    }
    /* Put NULL termination. */
    if (unicode)
        error = mb_put_uint16le(mbp, 0);
    else
        error = mb_put_uint8(mbp, 0);

    return (error);
}

/*
 * Convert a Unicode directory entry to UTF-8
 */
void
smbfs_fname_tolocal(struct smbfs_fctx *ctx)
{
    uchar_t tmpbuf[SMB_MAXFNAMELEN+1];
    struct smb_vc *vcp = SSTOVC(ctx->f_ssp);
    uchar_t *dst;
    const ushort_t *src;
    size_t inlen, outlen;
    int flags;

    if (ctx->f_nmlen == 0)
        return;

    if (!SMB_UNICODE_STRINGS(vcp))
        return;

    if (ctx->f_namesz < sizeof (tmpbuf)) {
        ASSERT(0);
        goto errout;
    }

    /*
     * In-place conversions are not supported,
     * so convert into tmpbuf and copy.
     */
    dst = tmpbuf;
    outlen = SMB_MAXFNAMELEN;
    /*LINTED*/
    src = (const ushort_t *)ctx->f_name;
    inlen = ctx->f_nmlen / 2;   /* number of UCS-2 characters */
    flags = UCONV_IN_LITTLE_ENDIAN;

    if (uconv_u16tou8(src, &inlen, dst, &outlen, flags) != 0)
        goto errout;

    ASSERT(outlen < sizeof (tmpbuf));
    tmpbuf[outlen] = '\0';
    bcopy(tmpbuf, ctx->f_name, outlen + 1);
    ctx->f_nmlen = (int)outlen;
    return;

errout:
    /*
     * Conversion failed, but our caller does not
     * deal with errors here, so just put a "?".
     * Don't expect to ever see this.
     */
    (void) strlcpy(ctx->f_name, "?", ctx->f_namesz);
}