usr/src/uts/common/fs/smbclnt/smbfs/smbfs_subr.c

   1 /*
   2  * Copyright (c) 2000-2001, Boris Popov
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *    This product includes software developed by Boris Popov.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $Id: smbfs_subr.c,v 1.18 2005/02/02 00:22:23 lindak Exp $
  33  */
  34
  35 /*
  36  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  37  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  38  * Use is subject to license terms.
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/time.h>
  44 #include <sys/vnode.h>
  45 #include <sys/sunddi.h>
  46
  47 #include <netsmb/smb_osdep.h>
  48
  49 #include <netsmb/smb.h>
  50 #include <netsmb/smb_conn.h>
  51 #include <netsmb/smb_subr.h>
  52 #include <netsmb/smb_rq.h>
  53
  54 #include <smbfs/smbfs.h>
  55 #include <smbfs/smbfs_node.h>
  56 #include <smbfs/smbfs_subr.h>
  57
  58 /*
  59  * In the Darwin code, this function used to compute the full path
  60  * by following the chain of n_parent pointers back to the root.
  61  * In the Solaris port we found the n_parent pointers inconvenient
  62  * because they hold parent nodes busy.  We now keep the full path
  63  * in every node, so this function need only marshall the directory
  64  * path, and (if provided) the separator and last component name.
  65  *
  66  * Note that this logic must match that in smbfs_getino
  67  */
  68 int
  69 smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *dnp,
  70         const char *name, int nmlen, u_int8_t sep)
  71 {
  72         int caseopt = SMB_CS_NONE;
  73         int unicode = (SMB_UNICODE_STRINGS(vcp)) ? 1 : 0;
  74         int error;
  75
  76         if (SMB_DIALECT(vcp) < SMB_DIALECT_LANMAN1_0)
  77                 caseopt |= SMB_CS_UPPER;
  78
  79         if (unicode) {
  80                 error = mb_put_padbyte(mbp);
  81                 if (error)
  82                         return (error);
  83         }
  84
  85         error = smb_put_dmem(mbp, vcp,
  86             dnp->n_rpath, dnp->n_rplen,
  87             caseopt, NULL);
  88         if (name) {
  89                 /*
  90                  * Special case at share root:
  91                  * Don't put another slash.
  92                  */
  93                 if (dnp->n_rplen <= 1 && sep == '\\')
  94                         sep = 0;
  95                 /*
  96                  * More special cases, now for XATTR:
  97                  * Our "faked up" XATTR directories use a
  98                  * full path name ending with ":" so as to
  99                  * avoid conflicts with any real paths.
 100                  * (It is not a valid CIFS path name.)
 101                  * Therefore, when we're composing a full
 102                  * path name from an XATTR directory, we
 103                  * need to _ommit_ the ":" separator and
 104                  * instead copy the one from the "fake"
 105                  * parent node's path name.
 106                  */
 107                 if (dnp->n_flag & N_XATTR)
 108                         sep = 0;
 109
 110                 if (sep) {
 111                         /* Put the separator */
 112                         if (unicode)
 113                                 error = mb_put_uint16le(mbp, sep);
 114                         else
 115                                 error = mb_put_uint8(mbp, sep);
 116                         if (error)
 117                                 return (error);
 118                 }
 119                 /* Put the name */
 120                 error = smb_put_dmem(mbp, vcp,
 121                     name, nmlen, caseopt, NULL);
 122                 if (error)
 123                         return (error);
 124         }
 125         /* Put NULL termination. */
 126         if (unicode)
 127                 error = mb_put_uint16le(mbp, 0);
 128         else
 129                 error = mb_put_uint8(mbp, 0);
 130
 131         return (error);
 132 }
 133
 134 /*
 135  * Convert a Unicode directory entry to UTF-8
 136  */
 137 void
 138 smbfs_fname_tolocal(struct smbfs_fctx *ctx)
 139 {
 140         uchar_t tmpbuf[SMB_MAXFNAMELEN+1];
 141         struct smb_vc *vcp = SSTOVC(ctx->f_ssp);
 142         uchar_t *dst;
 143         const ushort_t *src;
 144         size_t inlen, outlen;
 145         int flags;
 146
 147         if (ctx->f_nmlen == 0)
 148                 return;
 149
 150         if (!SMB_UNICODE_STRINGS(vcp))
 151                 return;
 152
 153         if (ctx->f_namesz < sizeof (tmpbuf)) {
 154                 ASSERT(0);
 155                 goto errout;
 156         }
 157
 158         /*
 159          * In-place conversions are not supported,
 160          * so convert into tmpbuf and copy.
 161          */
 162         dst = tmpbuf;
 163         outlen = SMB_MAXFNAMELEN;
 164         /*LINTED*/
 165         src = (const ushort_t *)ctx->f_name;
 166         inlen = ctx->f_nmlen / 2;       /* number of UCS-2 characters */
 167         flags = UCONV_IN_LITTLE_ENDIAN;
 168
 169         if (uconv_u16tou8(src, &inlen, dst, &outlen, flags) != 0)
 170                 goto errout;
 171
 172         ASSERT(outlen < sizeof (tmpbuf));
 173         tmpbuf[outlen] = '\0';
 174         bcopy(tmpbuf, ctx->f_name, outlen + 1);
 175         ctx->f_nmlen = (int)outlen;
 176         return;
 177
 178 errout:
 179         /*
 180          * Conversion failed, but our caller does not
 181          * deal with errors here, so just put a "?".
 182          * Don't expect to ever see this.
 183          */
 184         (void) strlcpy(ctx->f_name, "?", ctx->f_namesz);
 185 }