1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates.
  24  * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
  25  */
  26 
  27 /*
  28  * Dispatch function for SMB2_CHANGE_NOTIFY
  29  */
  30 
  31 #include <smbsrv/smb2_kproto.h>
  32 
  33 static smb_sdrc_t smb2_change_notify_async(smb_request_t *);
  34 
  35 smb_sdrc_t
  36 smb2_change_notify(smb_request_t *sr)
  37 {
  38         smb_node_t *node = NULL;
  39         uint16_t StructSize;
  40         uint16_t iFlags;
  41         uint32_t oBufLength;
  42         smb2fid_t smb2fid;
  43         uint32_t CompletionFilter;
  44         uint32_t reserved;
  45         uint32_t status;
  46         int rc = 0;
  47 
  48         /*
  49          * SMB2 Change Notify request
  50          */
  51         rc = smb_mbc_decodef(
  52             &sr->smb_data,               "wwlqqll",
  53             &StructSize,            /* w */
  54             &iFlags,                        /* w */
  55             &oBufLength,            /* l */
  56             &smb2fid.persistent,    /* q */
  57             &smb2fid.temporal,              /* q */
  58             &CompletionFilter,              /* l */
  59             &reserved);                     /* l */
  60         if (rc || StructSize != 32)
  61                 return (SDRC_ERROR);
  62 
  63         status = smb2sr_lookup_fid(sr, &smb2fid);
  64         if (status)
  65                 goto puterror;
  66 
  67         node = sr->fid_ofile->f_node;
  68         if (node == NULL || !smb_node_is_dir(node)) {
  69                 status = NT_STATUS_INVALID_PARAMETER;
  70                 goto puterror;
  71         }
  72 
  73         /*
  74          * Let Change Notify "go async", because it
  75          * may block indefinitely.
  76          */
  77         status = smb2sr_go_async(sr, smb2_change_notify_async);
  78 puterror:
  79         ASSERT(status != 0);
  80         smb2sr_put_error(sr, status);
  81         return (SDRC_SUCCESS);
  82 }
  83 
  84 static smb_sdrc_t
  85 smb2_change_notify_async(smb_request_t *sr)
  86 {
  87         uint16_t StructSize;
  88         uint16_t iFlags;
  89         uint32_t oBufLength;
  90         smb2fid_t smb2fid;
  91         uint32_t CompletionFilter;
  92         uint32_t reserved;
  93         uint32_t status;
  94         uint16_t DataOff;
  95         int rc = 0;
  96 
  97         /*
  98          * SMB2 Change Notify request
  99          */
 100         rc = smb_mbc_decodef(
 101             &sr->smb_data,               "wwlqqll",
 102             &StructSize,            /* w */
 103             &iFlags,                        /* w */
 104             &oBufLength,            /* l */
 105             &smb2fid.persistent,    /* q */
 106             &smb2fid.temporal,              /* q */
 107             &CompletionFilter,              /* l */
 108             &reserved);                     /* l */
 109         if (rc || StructSize != 32)
 110                 return (SDRC_ERROR);
 111 
 112         status = smb2sr_lookup_fid(sr, &smb2fid);
 113         if (status != 0) {
 114                 smb2sr_put_error(sr, status);
 115                 return (SDRC_SUCCESS);
 116         }
 117 
 118         CompletionFilter &= FILE_NOTIFY_VALID_MASK;
 119         if (iFlags & SMB2_WATCH_TREE)
 120                 CompletionFilter |= NODE_FLAGS_WATCH_TREE;
 121 
 122         if (oBufLength > smb2_max_trans)
 123                 oBufLength = smb2_max_trans;
 124         sr->raw_data.max_bytes = oBufLength;
 125 
 126         status = smb_notify_common(sr, &sr->raw_data, CompletionFilter);
 127         if (status != 0) {
 128                 smb2sr_put_error(sr, status);
 129                 return (SDRC_SUCCESS);
 130         }
 131 
 132         /*
 133          * SMB2 Change Notify reply
 134          */
 135         DataOff = SMB2_HDR_SIZE + 8;
 136         oBufLength = MBC_LENGTH(&sr->raw_data);
 137         rc = smb_mbc_encodef(
 138             &sr->reply, "wwlC",
 139             9,  /* StructSize */        /* w */
 140             DataOff,                    /* w */
 141             oBufLength,                 /* l */
 142             &sr->raw_data);              /* C */
 143         if (rc)
 144                 return (SDRC_ERROR);
 145 
 146         return (SDRC_SUCCESS);
 147 }