Ticket #9909: report-e9209f.html

File report-e9209f.html, 1.2 MB (added by mt, 8 years ago)

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57<!-- BUGDESC Potential leak of memory pointed to by 'layerFSName' -->
58
59<!-- BUGTYPE Memory leak -->
60
61<!-- BUGCATEGORY Memory Error -->
62
63<!-- BUGFILE /home/haiku/haiku/haiku/src/system/kernel/fs/vfs.cpp -->
64
65<!-- BUGLINE 7321 -->
66
67<!-- BUGPATHLENGTH 31 -->
68
69<!-- BUGMETAEND -->
70<!-- REPORTHEADER -->
71<h3>Bug Summary</h3>
72<table class="simpletable">
73<tr><td class="rowname">File:</td><td>src/system/kernel/fs/vfs.cpp</td></tr>
74<tr><td class="rowname">Location:</td><td><a href="#EndPath">line 7321, column 7</a></td></tr>
75<tr><td class="rowname">Description:</td><td>Potential leak of memory pointed to by 'layerFSName'</td></tr>
76</table>
77<!-- REPORTSUMMARYEXTRA -->
78<h3>Annotated Source Code</h3>
79<table class="code">
80<tr><td class="num" id="LN1">1</td><td class="line"><span class='comment'>/*</span></td></tr>
81<tr><td class="num" id="LN2">2</td><td class="line"> <span class='comment'>* Copyright 2005-2011, Ingo Weinhold, ingo_weinhold@gmx.de.</span></td></tr>
82<tr><td class="num" id="LN3">3</td><td class="line"> <span class='comment'>* Copyright 2002-2011, Axel Dörfler, axeld@pinc-software.de.</span></td></tr>
83<tr><td class="num" id="LN4">4</td><td class="line"> <span class='comment'>* Distributed under the terms of the MIT License.</span></td></tr>
84<tr><td class="num" id="LN5">5</td><td class="line"> <span class='comment'>*</span></td></tr>
85<tr><td class="num" id="LN6">6</td><td class="line"> <span class='comment'>* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.</span></td></tr>
86<tr><td class="num" id="LN7">7</td><td class="line"> <span class='comment'>* Distributed under the terms of the NewOS License.</span></td></tr>
87<tr><td class="num" id="LN8">8</td><td class="line"> <span class='comment'>*/</span></td></tr>
88<tr><td class="num" id="LN9">9</td><td class="line"> </td></tr>
89<tr><td class="num" id="LN10">10</td><td class="line"> </td></tr>
90<tr><td class="num" id="LN11">11</td><td class="line"><span class='comment'>/*! Virtual File System and File System Interface Layer */</span></td></tr>
91<tr><td class="num" id="LN12">12</td><td class="line"> </td></tr>
92<tr><td class="num" id="LN13">13</td><td class="line"> </td></tr>
93<tr><td class="num" id="LN14">14</td><td class="line"><span class='directive'>#include &lt;ctype.h&gt;</span></td></tr>
94<tr><td class="num" id="LN15">15</td><td class="line"><span class='directive'>#include &lt;fcntl.h&gt;</span></td></tr>
95<tr><td class="num" id="LN16">16</td><td class="line"><span class='directive'>#include &lt;limits.h&gt;</span></td></tr>
96<tr><td class="num" id="LN17">17</td><td class="line"><span class='directive'>#include &lt;stddef.h&gt;</span></td></tr>
97<tr><td class="num" id="LN18">18</td><td class="line"><span class='directive'>#include &lt;stdio.h&gt;</span></td></tr>
98<tr><td class="num" id="LN19">19</td><td class="line"><span class='directive'>#include &lt;string.h&gt;</span></td></tr>
99<tr><td class="num" id="LN20">20</td><td class="line"><span class='directive'>#include &lt;sys/file.h&gt;</span></td></tr>
100<tr><td class="num" id="LN21">21</td><td class="line"><span class='directive'>#include &lt;sys/resource.h&gt;</span></td></tr>
101<tr><td class="num" id="LN22">22</td><td class="line"><span class='directive'>#include &lt;sys/stat.h&gt;</span></td></tr>
102<tr><td class="num" id="LN23">23</td><td class="line"><span class='directive'>#include &lt;unistd.h&gt;</span></td></tr>
103<tr><td class="num" id="LN24">24</td><td class="line"> </td></tr>
104<tr><td class="num" id="LN25">25</td><td class="line"><span class='directive'>#include &lt;fs_attr.h&gt;</span></td></tr>
105<tr><td class="num" id="LN26">26</td><td class="line"><span class='directive'>#include &lt;fs_info.h&gt;</span></td></tr>
106<tr><td class="num" id="LN27">27</td><td class="line"><span class='directive'>#include &lt;fs_interface.h&gt;</span></td></tr>
107<tr><td class="num" id="LN28">28</td><td class="line"><span class='directive'>#include &lt;fs_volume.h&gt;</span></td></tr>
108<tr><td class="num" id="LN29">29</td><td class="line"><span class='directive'>#include &lt;OS.h&gt;</span></td></tr>
109<tr><td class="num" id="LN30">30</td><td class="line"><span class='directive'>#include &lt;StorageDefs.h&gt;</span></td></tr>
110<tr><td class="num" id="LN31">31</td><td class="line"> </td></tr>
111<tr><td class="num" id="LN32">32</td><td class="line"><span class='directive'>#include &lt;AutoDeleter.h&gt;</span></td></tr>
112<tr><td class="num" id="LN33">33</td><td class="line"><span class='directive'>#include &lt;block_cache.h&gt;</span></td></tr>
113<tr><td class="num" id="LN34">34</td><td class="line"><span class='directive'>#include &lt;boot/kernel_args.h&gt;</span></td></tr>
114<tr><td class="num" id="LN35">35</td><td class="line"><span class='directive'>#include &lt;debug_heap.h&gt;</span></td></tr>
115<tr><td class="num" id="LN36">36</td><td class="line"><span class='directive'>#include &lt;disk_device_manager/KDiskDevice.h&gt;</span></td></tr>
116<tr><td class="num" id="LN37">37</td><td class="line"><span class='directive'>#include &lt;disk_device_manager/KDiskDeviceManager.h&gt;</span></td></tr>
117<tr><td class="num" id="LN38">38</td><td class="line"><span class='directive'>#include &lt;disk_device_manager/KDiskDeviceUtils.h&gt;</span></td></tr>
118<tr><td class="num" id="LN39">39</td><td class="line"><span class='directive'>#include &lt;disk_device_manager/KDiskSystem.h&gt;</span></td></tr>
119<tr><td class="num" id="LN40">40</td><td class="line"><span class='directive'>#include &lt;fd.h&gt;</span></td></tr>
120<tr><td class="num" id="LN41">41</td><td class="line"><span class='directive'>#include &lt;file_cache.h&gt;</span></td></tr>
121<tr><td class="num" id="LN42">42</td><td class="line"><span class='directive'>#include &lt;fs/node_monitor.h&gt;</span></td></tr>
122<tr><td class="num" id="LN43">43</td><td class="line"><span class='directive'>#include &lt;khash.h&gt;</span></td></tr>
123<tr><td class="num" id="LN44">44</td><td class="line"><span class='directive'>#include &lt;KPath.h&gt;</span></td></tr>
124<tr><td class="num" id="LN45">45</td><td class="line"><span class='directive'>#include &lt;lock.h&gt;</span></td></tr>
125<tr><td class="num" id="LN46">46</td><td class="line"><span class='directive'>#include &lt;low_resource_manager.h&gt;</span></td></tr>
126<tr><td class="num" id="LN47">47</td><td class="line"><span class='directive'>#include &lt;syscalls.h&gt;</span></td></tr>
127<tr><td class="num" id="LN48">48</td><td class="line"><span class='directive'>#include &lt;syscall_restart.h&gt;</span></td></tr>
128<tr><td class="num" id="LN49">49</td><td class="line"><span class='directive'>#include &lt;tracing.h&gt;</span></td></tr>
129<tr><td class="num" id="LN50">50</td><td class="line"><span class='directive'>#include &lt;util/atomic.h&gt;</span></td></tr>
130<tr><td class="num" id="LN51">51</td><td class="line"><span class='directive'>#include &lt;util/AutoLock.h&gt;</span></td></tr>
131<tr><td class="num" id="LN52">52</td><td class="line"><span class='directive'>#include &lt;util/DoublyLinkedList.h&gt;</span></td></tr>
132<tr><td class="num" id="LN53">53</td><td class="line"><span class='directive'>#include &lt;vfs.h&gt;</span></td></tr>
133<tr><td class="num" id="LN54">54</td><td class="line"><span class='directive'>#include &lt;vm/vm.h&gt;</span></td></tr>
134<tr><td class="num" id="LN55">55</td><td class="line"><span class='directive'>#include &lt;vm/VMCache.h&gt;</span></td></tr>
135<tr><td class="num" id="LN56">56</td><td class="line"> </td></tr>
136<tr><td class="num" id="LN57">57</td><td class="line"><span class='directive'>#include "EntryCache.h"</span></td></tr>
137<tr><td class="num" id="LN58">58</td><td class="line"><span class='directive'>#include "fifo.h"</span></td></tr>
138<tr><td class="num" id="LN59">59</td><td class="line"><span class='directive'>#include "IORequest.h"</span></td></tr>
139<tr><td class="num" id="LN60">60</td><td class="line"><span class='directive'>#include "unused_vnodes.h"</span></td></tr>
140<tr><td class="num" id="LN61">61</td><td class="line"><span class='directive'>#include "vfs_tracing.h"</span></td></tr>
141<tr><td class="num" id="LN62">62</td><td class="line"><span class='directive'>#include "Vnode.h"</span></td></tr>
142<tr><td class="num" id="LN63">63</td><td class="line"><span class='directive'>#include "../cache/vnode_store.h"</span></td></tr>
143<tr><td class="num" id="LN64">64</td><td class="line"> </td></tr>
144<tr><td class="num" id="LN65">65</td><td class="line"> </td></tr>
145<tr><td class="num" id="LN66">66</td><td class="line"><span class='comment'>//#define TRACE_VFS</span></td></tr>
146<tr><td class="num" id="LN67">67</td><td class="line"><span class='directive'>#ifdef TRACE_VFS</span></td></tr>
147<tr><td class="num" id="LN68">68</td><td class="line"><span class='directive'># define <span class='macro'>TRACE(x)<span class='expansion'>;</span></span> dprintf x</span></td></tr>
148<tr><td class="num" id="LN69">69</td><td class="line"><span class='directive'># define <span class='macro'>FUNCTION(x)<span class='expansion'>;</span></span> dprintf x</span></td></tr>
149<tr><td class="num" id="LN70">70</td><td class="line"><span class='directive'>#else</span></td></tr>
150<tr><td class="num" id="LN71">71</td><td class="line"><span class='directive'># define <span class='macro'>TRACE(x)<span class='expansion'>;</span></span> ;</span></td></tr>
151<tr><td class="num" id="LN72">72</td><td class="line"><span class='directive'># define <span class='macro'>FUNCTION(x)<span class='expansion'>;</span></span> ;</span></td></tr>
152<tr><td class="num" id="LN73">73</td><td class="line"><span class='directive'>#endif</span></td></tr>
153<tr><td class="num" id="LN74">74</td><td class="line"> </td></tr>
154<tr><td class="num" id="LN75">75</td><td class="line"><span class='directive'>#define ADD_DEBUGGER_COMMANDS</span></td></tr>
155<tr><td class="num" id="LN76">76</td><td class="line"> </td></tr>
156<tr><td class="num" id="LN77">77</td><td class="line"> </td></tr>
157<tr><td class="num" id="LN78">78</td><td class="line"><span class='directive'>#define <span class='macro'>HAS_FS_CALL(vnode, op)<span class='expansion'>(vnode-&gt;ops-&gt;op != __null)</span></span> (vnode-&gt;ops-&gt;op != <span class='macro'>NULL<span class='expansion'>__null</span></span>)</span></td></tr>
158<tr><td class="num" id="LN79">79</td><td class="line"><span class='directive'>#define <span class='macro'>HAS_FS_MOUNT_CALL(mount, op)<span class='expansion'>(mount-&gt;volume-&gt;ops-&gt;op != __null)</span></span> (mount-&gt;volume-&gt;ops-&gt;op != <span class='macro'>NULL<span class='expansion'>__null</span></span>)</span></td></tr>
159<tr><td class="num" id="LN80">80</td><td class="line"> </td></tr>
160<tr><td class="num" id="LN81">81</td><td class="line"><span class='directive'>#if <span class='macro'>KDEBUG<span class='expansion'>(2 &gt;= 2)</span></span></span></td></tr>
161<tr><td class="num" id="LN82">82</td><td class="line"><span class='directive'># define <span class='macro'>FS_CALL(vnode, op, params...)<span class='expansion'>( (vnode-&gt;ops-&gt;op != __null) ? vnode-&gt;ops-&gt;op(vnode<br>-&gt;mount-&gt;volume, vnode, params...) : (panic("FS_CALL op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
162<tr><td class="num" id="LN83">83</td><td class="line"> <span class='directive'>( <span class='macro'>HAS_FS_CALL(vnode, op)<span class='expansion'>(vnode-&gt;ops-&gt;op != __null)</span></span> ? \</span></td></tr>
163<tr><td class="num" id="LN84">84</td><td class="line"> <span class='directive'>vnode-&gt;ops-&gt;op(vnode-&gt;mount-&gt;volume, vnode, params) \</span></td></tr>
164<tr><td class="num" id="LN85">85</td><td class="line"> <span class='directive'>: (panic("FS_CALL op " #op " is NULL"), 0))</span></td></tr>
165<tr><td class="num" id="LN86">86</td><td class="line"><span class='directive'># define <span class='macro'>FS_CALL_NO_PARAMS(vnode, op)<span class='expansion'>( (vnode-&gt;ops-&gt;op != __null) ? vnode-&gt;ops-&gt;op(vnode<br>-&gt;mount-&gt;volume, vnode) : (panic("FS_CALL_NO_PARAMS op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
166<tr><td class="num" id="LN87">87</td><td class="line"> <span class='directive'>( <span class='macro'>HAS_FS_CALL(vnode, op)<span class='expansion'>(vnode-&gt;ops-&gt;op != __null)</span></span> ? \</span></td></tr>
167<tr><td class="num" id="LN88">88</td><td class="line"> <span class='directive'>vnode-&gt;ops-&gt;op(vnode-&gt;mount-&gt;volume, vnode) \</span></td></tr>
168<tr><td class="num" id="LN89">89</td><td class="line"> <span class='directive'>: (panic("FS_CALL_NO_PARAMS op " #op " is NULL"), 0))</span></td></tr>
169<tr><td class="num" id="LN90">90</td><td class="line"><span class='directive'># define <span class='macro'>FS_MOUNT_CALL(mount, op, params...)<span class='expansion'>( (mount-&gt;volume-&gt;ops-&gt;op != __null) ? mount-&gt;volume<br>-&gt;ops-&gt;op(mount-&gt;volume, params...) : (panic("FS_MOUNT_CALL op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
170<tr><td class="num" id="LN91">91</td><td class="line"> <span class='directive'>( <span class='macro'>HAS_FS_MOUNT_CALL(mount, op)<span class='expansion'>(mount-&gt;volume-&gt;ops-&gt;op != __null)</span></span> ? \</span></td></tr>
171<tr><td class="num" id="LN92">92</td><td class="line"> <span class='directive'>mount-&gt;volume-&gt;ops-&gt;op(mount-&gt;volume, params) \</span></td></tr>
172<tr><td class="num" id="LN93">93</td><td class="line"> <span class='directive'>: (panic("FS_MOUNT_CALL op " #op " is NULL"), 0))</span></td></tr>
173<tr><td class="num" id="LN94">94</td><td class="line"><span class='directive'># define <span class='macro'>FS_MOUNT_CALL_NO_PARAMS(mount, op)<span class='expansion'>( (mount-&gt;volume-&gt;ops-&gt;op != __null) ? mount-&gt;volume<br>-&gt;ops-&gt;op(mount-&gt;volume) : (panic("FS_MOUNT_CALL_NO_PARAMS op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
174<tr><td class="num" id="LN95">95</td><td class="line"> <span class='directive'>( <span class='macro'>HAS_FS_MOUNT_CALL(mount, op)<span class='expansion'>(mount-&gt;volume-&gt;ops-&gt;op != __null)</span></span> ? \</span></td></tr>
175<tr><td class="num" id="LN96">96</td><td class="line"> <span class='directive'>mount-&gt;volume-&gt;ops-&gt;op(mount-&gt;volume) \</span></td></tr>
176<tr><td class="num" id="LN97">97</td><td class="line"> <span class='directive'>: (panic("FS_MOUNT_CALL_NO_PARAMS op " #op " is NULL"), 0))</span></td></tr>
177<tr><td class="num" id="LN98">98</td><td class="line"><span class='directive'>#else</span></td></tr>
178<tr><td class="num" id="LN99">99</td><td class="line"><span class='directive'># define <span class='macro'>FS_CALL(vnode, op, params...)<span class='expansion'>( (vnode-&gt;ops-&gt;op != __null) ? vnode-&gt;ops-&gt;op(vnode<br>-&gt;mount-&gt;volume, vnode, params...) : (panic("FS_CALL op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
179<tr><td class="num" id="LN100">100</td><td class="line"> <span class='directive'>vnode-&gt;ops-&gt;op(vnode-&gt;mount-&gt;volume, vnode, params)</span></td></tr>
180<tr><td class="num" id="LN101">101</td><td class="line"><span class='directive'># define <span class='macro'>FS_CALL_NO_PARAMS(vnode, op)<span class='expansion'>( (vnode-&gt;ops-&gt;op != __null) ? vnode-&gt;ops-&gt;op(vnode<br>-&gt;mount-&gt;volume, vnode) : (panic("FS_CALL_NO_PARAMS op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
181<tr><td class="num" id="LN102">102</td><td class="line"> <span class='directive'>vnode-&gt;ops-&gt;op(vnode-&gt;mount-&gt;volume, vnode)</span></td></tr>
182<tr><td class="num" id="LN103">103</td><td class="line"><span class='directive'># define <span class='macro'>FS_MOUNT_CALL(mount, op, params...)<span class='expansion'>( (mount-&gt;volume-&gt;ops-&gt;op != __null) ? mount-&gt;volume<br>-&gt;ops-&gt;op(mount-&gt;volume, params...) : (panic("FS_MOUNT_CALL op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
183<tr><td class="num" id="LN104">104</td><td class="line"> <span class='directive'>mount-&gt;volume-&gt;ops-&gt;op(mount-&gt;volume, params)</span></td></tr>
184<tr><td class="num" id="LN105">105</td><td class="line"><span class='directive'># define <span class='macro'>FS_MOUNT_CALL_NO_PARAMS(mount, op)<span class='expansion'>( (mount-&gt;volume-&gt;ops-&gt;op != __null) ? mount-&gt;volume<br>-&gt;ops-&gt;op(mount-&gt;volume) : (panic("FS_MOUNT_CALL_NO_PARAMS op "<br> "op" " is NULL"), 0))</span></span> \</span></td></tr>
185<tr><td class="num" id="LN106">106</td><td class="line"> <span class='directive'>mount-&gt;volume-&gt;ops-&gt;op(mount-&gt;volume)</span></td></tr>
186<tr><td class="num" id="LN107">107</td><td class="line"><span class='directive'>#endif</span></td></tr>
187<tr><td class="num" id="LN108">108</td><td class="line"> </td></tr>
188<tr><td class="num" id="LN109">109</td><td class="line"> </td></tr>
189<tr><td class="num" id="LN110">110</td><td class="line"><span class='keyword'>const</span> <span class='keyword'>static</span> size_t kMaxPathLength = 65536;</td></tr>
190<tr><td class="num" id="LN111">111</td><td class="line"> <span class='comment'>// The absolute maximum path length (for getcwd() - this is not depending</span></td></tr>
191<tr><td class="num" id="LN112">112</td><td class="line"> <span class='comment'>// on PATH_MAX</span></td></tr>
192<tr><td class="num" id="LN113">113</td><td class="line"> </td></tr>
193<tr><td class="num" id="LN114">114</td><td class="line"> </td></tr>
194<tr><td class="num" id="LN115">115</td><td class="line"><span class='keyword'>struct</span> vnode_hash_key {</td></tr>
195<tr><td class="num" id="LN116">116</td><td class="line"> dev_t device;</td></tr>
196<tr><td class="num" id="LN117">117</td><td class="line"> ino_t vnode;</td></tr>
197<tr><td class="num" id="LN118">118</td><td class="line">};</td></tr>
198<tr><td class="num" id="LN119">119</td><td class="line"> </td></tr>
199<tr><td class="num" id="LN120">120</td><td class="line"><span class='keyword'>typedef</span> DoublyLinkedList&lt;vnode&gt; VnodeList;</td></tr>
200<tr><td class="num" id="LN121">121</td><td class="line"> </td></tr>
201<tr><td class="num" id="LN122">122</td><td class="line"><span class='comment'>/*! \brief Structure to manage a mounted file system</span></td></tr>
202<tr><td class="num" id="LN123">123</td><td class="line"> </td></tr>
203<tr><td class="num" id="LN124">124</td><td class="line"> <span class='comment'>Note: The root_vnode and root_vnode-&gt;covers fields (what others?) are</span></td></tr>
204<tr><td class="num" id="LN125">125</td><td class="line"> <span class='comment'>initialized in fs_mount() and not changed afterwards. That is as soon</span></td></tr>
205<tr><td class="num" id="LN126">126</td><td class="line"> <span class='comment'>as the mount is mounted and it is made sure it won't be unmounted</span></td></tr>
206<tr><td class="num" id="LN127">127</td><td class="line"> <span class='comment'>(e.g. by holding a reference to a vnode of that mount) (read) access</span></td></tr>
207<tr><td class="num" id="LN128">128</td><td class="line"> <span class='comment'>to those fields is always safe, even without additional locking. Morever</span></td></tr>
208<tr><td class="num" id="LN129">129</td><td class="line"> <span class='comment'>while mounted the mount holds a reference to the root_vnode-&gt;covers vnode,</span></td></tr>
209<tr><td class="num" id="LN130">130</td><td class="line"> <span class='comment'>and thus making the access path vnode-&gt;mount-&gt;root_vnode-&gt;covers-&gt;mount-&gt;...</span></td></tr>
210<tr><td class="num" id="LN131">131</td><td class="line"> <span class='comment'>safe if a reference to vnode is held (note that for the root mount</span></td></tr>
211<tr><td class="num" id="LN132">132</td><td class="line"> <span class='comment'>root_vnode-&gt;covers is NULL, though).</span></td></tr>
212<tr><td class="num" id="LN133">133</td><td class="line"><span class='comment'>*/</span></td></tr>
213<tr><td class="num" id="LN134">134</td><td class="line"><span class='keyword'>struct</span> fs_mount {</td></tr>
214<tr><td class="num" id="LN135">135</td><td class="line"> fs_mount()</td></tr>
215<tr><td class="num" id="LN136">136</td><td class="line"> :</td></tr>
216<tr><td class="num" id="LN137">137</td><td class="line"> volume(<span class='macro'>NULL<span class='expansion'>__null</span></span>),</td></tr>
217<tr><td class="num" id="LN138">138</td><td class="line"> device_name(<span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
218<tr><td class="num" id="LN139">139</td><td class="line"> {</td></tr>
219<tr><td class="num" id="LN140">140</td><td class="line"> recursive_lock_init(&amp;rlock, <span class='string_literal'>"mount rlock"</span>);</td></tr>
220<tr><td class="num" id="LN141">141</td><td class="line"> }</td></tr>
221<tr><td class="num" id="LN142">142</td><td class="line"> </td></tr>
222<tr><td class="num" id="LN143">143</td><td class="line"> ~fs_mount()</td></tr>
223<tr><td class="num" id="LN144">144</td><td class="line"> {</td></tr>
224<tr><td class="num" id="LN145">145</td><td class="line"> recursive_lock_destroy(&amp;rlock);</td></tr>
225<tr><td class="num" id="LN146">146</td><td class="line"> free(device_name);</td></tr>
226<tr><td class="num" id="LN147">147</td><td class="line"> </td></tr>
227<tr><td class="num" id="LN148">148</td><td class="line"> <span class='keyword'>while</span> (volume) {</td></tr>
228<tr><td class="num" id="LN149">149</td><td class="line"> fs_volume* superVolume = volume-&gt;super_volume;</td></tr>
229<tr><td class="num" id="LN150">150</td><td class="line"> </td></tr>
230<tr><td class="num" id="LN151">151</td><td class="line"> <span class='keyword'>if</span> (volume-&gt;file_system != <span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
231<tr><td class="num" id="LN152">152</td><td class="line"> put_module(volume-&gt;file_system-&gt;info.name);</td></tr>
232<tr><td class="num" id="LN153">153</td><td class="line"> </td></tr>
233<tr><td class="num" id="LN154">154</td><td class="line"> free(volume-&gt;file_system_name);</td></tr>
234<tr><td class="num" id="LN155">155</td><td class="line"> free(volume);</td></tr>
235<tr><td class="num" id="LN156">156</td><td class="line"> volume = superVolume;</td></tr>
236<tr><td class="num" id="LN157">157</td><td class="line"> }</td></tr>
237<tr><td class="num" id="LN158">158</td><td class="line"> }</td></tr>
238<tr><td class="num" id="LN159">159</td><td class="line"> </td></tr>
239<tr><td class="num" id="LN160">160</td><td class="line"> <span class='keyword'>struct</span> fs_mount* next;</td></tr>
240<tr><td class="num" id="LN161">161</td><td class="line"> dev_t id;</td></tr>
241<tr><td class="num" id="LN162">162</td><td class="line"> fs_volume* volume;</td></tr>
242<tr><td class="num" id="LN163">163</td><td class="line"> <span class='keyword'>char</span>* device_name;</td></tr>
243<tr><td class="num" id="LN164">164</td><td class="line"> recursive_lock rlock; <span class='comment'>// guards the vnodes list</span></td></tr>
244<tr><td class="num" id="LN165">165</td><td class="line"> <span class='comment'>// TODO: Make this a mutex! It is never used recursively.</span></td></tr>
245<tr><td class="num" id="LN166">166</td><td class="line"> <span class='keyword'>struct</span> vnode* root_vnode;</td></tr>
246<tr><td class="num" id="LN167">167</td><td class="line"> <span class='keyword'>struct</span> vnode* covers_vnode; <span class='comment'>// immutable</span></td></tr>
247<tr><td class="num" id="LN168">168</td><td class="line"> KPartition* partition;</td></tr>
248<tr><td class="num" id="LN169">169</td><td class="line"> VnodeList vnodes;</td></tr>
249<tr><td class="num" id="LN170">170</td><td class="line"> EntryCache entry_cache;</td></tr>
250<tr><td class="num" id="LN171">171</td><td class="line"> <span class='keyword'>bool</span> unmounting;</td></tr>
251<tr><td class="num" id="LN172">172</td><td class="line"> <span class='keyword'>bool</span> owns_file_device;</td></tr>
252<tr><td class="num" id="LN173">173</td><td class="line">};</td></tr>
253<tr><td class="num" id="LN174">174</td><td class="line"> </td></tr>
254<tr><td class="num" id="LN175">175</td><td class="line"><span class='keyword'>struct</span> advisory_lock : <span class='keyword'>public</span> DoublyLinkedListLinkImpl&lt;advisory_lock&gt; {</td></tr>
255<tr><td class="num" id="LN176">176</td><td class="line"> list_link link;</td></tr>
256<tr><td class="num" id="LN177">177</td><td class="line"> team_id team;</td></tr>
257<tr><td class="num" id="LN178">178</td><td class="line"> pid_t session;</td></tr>
258<tr><td class="num" id="LN179">179</td><td class="line"> off_t start;</td></tr>
259<tr><td class="num" id="LN180">180</td><td class="line"> off_t end;</td></tr>
260<tr><td class="num" id="LN181">181</td><td class="line"> <span class='keyword'>bool</span> shared;</td></tr>
261<tr><td class="num" id="LN182">182</td><td class="line">};</td></tr>
262<tr><td class="num" id="LN183">183</td><td class="line"> </td></tr>
263<tr><td class="num" id="LN184">184</td><td class="line"><span class='keyword'>typedef</span> DoublyLinkedList&lt;advisory_lock&gt; LockList;</td></tr>
264<tr><td class="num" id="LN185">185</td><td class="line"> </td></tr>
265<tr><td class="num" id="LN186">186</td><td class="line"><span class='keyword'>struct</span> advisory_locking {</td></tr>
266<tr><td class="num" id="LN187">187</td><td class="line"> sem_id lock;</td></tr>
267<tr><td class="num" id="LN188">188</td><td class="line"> sem_id wait_sem;</td></tr>
268<tr><td class="num" id="LN189">189</td><td class="line"> LockList locks;</td></tr>
269<tr><td class="num" id="LN190">190</td><td class="line"> </td></tr>
270<tr><td class="num" id="LN191">191</td><td class="line"> advisory_locking()</td></tr>
271<tr><td class="num" id="LN192">192</td><td class="line"> :</td></tr>
272<tr><td class="num" id="LN193">193</td><td class="line"> lock(-1),</td></tr>
273<tr><td class="num" id="LN194">194</td><td class="line"> wait_sem(-1)</td></tr>
274<tr><td class="num" id="LN195">195</td><td class="line"> {</td></tr>
275<tr><td class="num" id="LN196">196</td><td class="line"> }</td></tr>
276<tr><td class="num" id="LN197">197</td><td class="line"> </td></tr>
277<tr><td class="num" id="LN198">198</td><td class="line"> ~advisory_locking()</td></tr>
278<tr><td class="num" id="LN199">199</td><td class="line"> {</td></tr>
279<tr><td class="num" id="LN200">200</td><td class="line"> <span class='keyword'>if</span> (lock &gt;= 0)</td></tr>
280<tr><td class="num" id="LN201">201</td><td class="line"> delete_sem(lock);</td></tr>
281<tr><td class="num" id="LN202">202</td><td class="line"> <span class='keyword'>if</span> (wait_sem &gt;= 0)</td></tr>
282<tr><td class="num" id="LN203">203</td><td class="line"> delete_sem(wait_sem);</td></tr>
283<tr><td class="num" id="LN204">204</td><td class="line"> }</td></tr>
284<tr><td class="num" id="LN205">205</td><td class="line">};</td></tr>
285<tr><td class="num" id="LN206">206</td><td class="line"> </td></tr>
286<tr><td class="num" id="LN207">207</td><td class="line"><span class='comment'>/*! \brief Guards sMountsTable.</span></td></tr>
287<tr><td class="num" id="LN208">208</td><td class="line"> </td></tr>
288<tr><td class="num" id="LN209">209</td><td class="line"> <span class='comment'>The holder is allowed to read/write access the sMountsTable.</span></td></tr>
289<tr><td class="num" id="LN210">210</td><td class="line"> <span class='comment'>Manipulation of the fs_mount structures themselves</span></td></tr>
290<tr><td class="num" id="LN211">211</td><td class="line"> <span class='comment'>(and their destruction) requires different locks though.</span></td></tr>
291<tr><td class="num" id="LN212">212</td><td class="line"><span class='comment'>*/</span></td></tr>
292<tr><td class="num" id="LN213">213</td><td class="line"><span class='keyword'>static</span> mutex sMountMutex = <span class='macro'>MUTEX_INITIALIZER(<span class='string_literal'>"vfs_mount_lock"</span>)<span class='expansion'>{ "vfs_mount_lock", __null, -1, 0 }</span></span>;</td></tr>
293<tr><td class="num" id="LN214">214</td><td class="line"> </td></tr>
294<tr><td class="num" id="LN215">215</td><td class="line"><span class='comment'>/*! \brief Guards mount/unmount operations.</span></td></tr>
295<tr><td class="num" id="LN216">216</td><td class="line"> </td></tr>
296<tr><td class="num" id="LN217">217</td><td class="line"> <span class='comment'>The fs_mount() and fs_unmount() hold the lock during their whole operation.</span></td></tr>
297<tr><td class="num" id="LN218">218</td><td class="line"> <span class='comment'>That is locking the lock ensures that no FS is mounted/unmounted. In</span></td></tr>
298<tr><td class="num" id="LN219">219</td><td class="line"> <span class='comment'>particular this means that</span></td></tr>
299<tr><td class="num" id="LN220">220</td><td class="line"> <span class='comment'>- sMountsTable will not be modified,</span></td></tr>
300<tr><td class="num" id="LN221">221</td><td class="line"> <span class='comment'>- the fields immutable after initialization of the fs_mount structures in</span></td></tr>
301<tr><td class="num" id="LN222">222</td><td class="line"> <span class='comment'>sMountsTable will not be modified,</span></td></tr>
302<tr><td class="num" id="LN223">223</td><td class="line"> </td></tr>
303<tr><td class="num" id="LN224">224</td><td class="line"> <span class='comment'>The thread trying to lock the lock must not hold sVnodeLock or</span></td></tr>
304<tr><td class="num" id="LN225">225</td><td class="line"> <span class='comment'>sMountMutex.</span></td></tr>
305<tr><td class="num" id="LN226">226</td><td class="line"><span class='comment'>*/</span></td></tr>
306<tr><td class="num" id="LN227">227</td><td class="line"><span class='keyword'>static</span> recursive_lock sMountOpLock;</td></tr>
307<tr><td class="num" id="LN228">228</td><td class="line"> </td></tr>
308<tr><td class="num" id="LN229">229</td><td class="line"><span class='comment'>/*! \brief Guards sVnodeTable.</span></td></tr>
309<tr><td class="num" id="LN230">230</td><td class="line"> </td></tr>
310<tr><td class="num" id="LN231">231</td><td class="line"> <span class='comment'>The holder is allowed read/write access to sVnodeTable and to</span></td></tr>
311<tr><td class="num" id="LN232">232</td><td class="line"> <span class='comment'>any unbusy vnode in that table, save to the immutable fields (device, id,</span></td></tr>
312<tr><td class="num" id="LN233">233</td><td class="line"> <span class='comment'>private_node, mount) to which only read-only access is allowed.</span></td></tr>
313<tr><td class="num" id="LN234">234</td><td class="line"> <span class='comment'>The mutable fields advisory_locking, mandatory_locked_by, and ref_count, as</span></td></tr>
314<tr><td class="num" id="LN235">235</td><td class="line"> <span class='comment'>well as the busy, removed, unused flags, and the vnode's type can also be</span></td></tr>
315<tr><td class="num" id="LN236">236</td><td class="line"> <span class='comment'>write accessed when holding a read lock to sVnodeLock *and* having the vnode</span></td></tr>
316<tr><td class="num" id="LN237">237</td><td class="line"> <span class='comment'>locked. Write access to covered_by and covers requires to write lock</span></td></tr>
317<tr><td class="num" id="LN238">238</td><td class="line"> <span class='comment'>sVnodeLock.</span></td></tr>
318<tr><td class="num" id="LN239">239</td><td class="line"> </td></tr>
319<tr><td class="num" id="LN240">240</td><td class="line"> <span class='comment'>The thread trying to acquire the lock must not hold sMountMutex.</span></td></tr>
320<tr><td class="num" id="LN241">241</td><td class="line"> <span class='comment'>You must not hold this lock when calling create_sem(), as this might call</span></td></tr>
321<tr><td class="num" id="LN242">242</td><td class="line"> <span class='comment'>vfs_free_unused_vnodes() and thus cause a deadlock.</span></td></tr>
322<tr><td class="num" id="LN243">243</td><td class="line"><span class='comment'>*/</span></td></tr>
323<tr><td class="num" id="LN244">244</td><td class="line"><span class='keyword'>static</span> rw_lock sVnodeLock = <span class='macro'>RW_LOCK_INITIALIZER(<span class='string_literal'>"vfs_vnode_lock"</span>)<span class='expansion'>{ "vfs_vnode_lock", __null, -1, 0, 0, 0 }</span></span>;</td></tr>
324<tr><td class="num" id="LN245">245</td><td class="line"> </td></tr>
325<tr><td class="num" id="LN246">246</td><td class="line"><span class='comment'>/*! \brief Guards io_context::root.</span></td></tr>
326<tr><td class="num" id="LN247">247</td><td class="line"> </td></tr>
327<tr><td class="num" id="LN248">248</td><td class="line"> <span class='comment'>Must be held when setting or getting the io_context::root field.</span></td></tr>
328<tr><td class="num" id="LN249">249</td><td class="line"> <span class='comment'>The only operation allowed while holding this lock besides getting or</span></td></tr>
329<tr><td class="num" id="LN250">250</td><td class="line"> <span class='comment'>setting the field is inc_vnode_ref_count() on io_context::root.</span></td></tr>
330<tr><td class="num" id="LN251">251</td><td class="line"><span class='comment'>*/</span></td></tr>
331<tr><td class="num" id="LN252">252</td><td class="line"><span class='keyword'>static</span> mutex sIOContextRootLock = <span class='macro'>MUTEX_INITIALIZER(<span class='string_literal'>"io_context::root lock"</span>)<span class='expansion'>{ "io_context::root lock", __null, -1, 0 }</span></span>;</td></tr>
332<tr><td class="num" id="LN253">253</td><td class="line"> </td></tr>
333<tr><td class="num" id="LN254">254</td><td class="line"> </td></tr>
334<tr><td class="num" id="LN255">255</td><td class="line"><span class='directive'>#define <span class='macro'>VNODE_HASH_TABLE_SIZE<span class='expansion'>1024</span></span> 1024</span></td></tr>
335<tr><td class="num" id="LN256">256</td><td class="line"><span class='keyword'>static</span> hash_table* sVnodeTable;</td></tr>
336<tr><td class="num" id="LN257">257</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> vnode* sRoot;</td></tr>
337<tr><td class="num" id="LN258">258</td><td class="line"> </td></tr>
338<tr><td class="num" id="LN259">259</td><td class="line"><span class='directive'>#define <span class='macro'>MOUNTS_HASH_TABLE_SIZE<span class='expansion'>16</span></span> 16</span></td></tr>
339<tr><td class="num" id="LN260">260</td><td class="line"><span class='keyword'>static</span> hash_table* sMountsTable;</td></tr>
340<tr><td class="num" id="LN261">261</td><td class="line"><span class='keyword'>static</span> dev_t sNextMountID = 1;</td></tr>
341<tr><td class="num" id="LN262">262</td><td class="line"> </td></tr>
342<tr><td class="num" id="LN263">263</td><td class="line"><span class='directive'>#define <span class='macro'>MAX_TEMP_IO_VECS<span class='expansion'>8</span></span> 8</span></td></tr>
343<tr><td class="num" id="LN264">264</td><td class="line"> </td></tr>
344<tr><td class="num" id="LN265">265</td><td class="line">mode_t __gUmask = 022;</td></tr>
345<tr><td class="num" id="LN266">266</td><td class="line"> </td></tr>
346<tr><td class="num" id="LN267">267</td><td class="line"><span class='comment'>/* function declarations */</span></td></tr>
347<tr><td class="num" id="LN268">268</td><td class="line"> </td></tr>
348<tr><td class="num" id="LN269">269</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> free_unused_vnodes();</td></tr>
349<tr><td class="num" id="LN270">270</td><td class="line"> </td></tr>
350<tr><td class="num" id="LN271">271</td><td class="line"><span class='comment'>// file descriptor operation prototypes</span></td></tr>
351<tr><td class="num" id="LN272">272</td><td class="line"><span class='keyword'>static</span> status_t file_read(<span class='keyword'>struct</span> file_descriptor* descriptor, off_t pos,</td></tr>
352<tr><td class="num" id="LN273">273</td><td class="line"> <span class='keyword'>void</span>* buffer, size_t* _bytes);</td></tr>
353<tr><td class="num" id="LN274">274</td><td class="line"><span class='keyword'>static</span> status_t file_write(<span class='keyword'>struct</span> file_descriptor* descriptor, off_t pos,</td></tr>
354<tr><td class="num" id="LN275">275</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>void</span>* buffer, size_t* _bytes);</td></tr>
355<tr><td class="num" id="LN276">276</td><td class="line"><span class='keyword'>static</span> off_t file_seek(<span class='keyword'>struct</span> file_descriptor* descriptor, off_t pos,</td></tr>
356<tr><td class="num" id="LN277">277</td><td class="line"> <span class='keyword'>int</span> seekType);</td></tr>
357<tr><td class="num" id="LN278">278</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> file_free_fd(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
358<tr><td class="num" id="LN279">279</td><td class="line"><span class='keyword'>static</span> status_t file_close(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
359<tr><td class="num" id="LN280">280</td><td class="line"><span class='keyword'>static</span> status_t file_select(<span class='keyword'>struct</span> file_descriptor* descriptor, uint8 event,</td></tr>
360<tr><td class="num" id="LN281">281</td><td class="line"> <span class='keyword'>struct</span> selectsync* sync);</td></tr>
361<tr><td class="num" id="LN282">282</td><td class="line"><span class='keyword'>static</span> status_t file_deselect(<span class='keyword'>struct</span> file_descriptor* descriptor, uint8 event,</td></tr>
362<tr><td class="num" id="LN283">283</td><td class="line"> <span class='keyword'>struct</span> selectsync* sync);</td></tr>
363<tr><td class="num" id="LN284">284</td><td class="line"><span class='keyword'>static</span> status_t dir_read(<span class='keyword'>struct</span> io_context* context,</td></tr>
364<tr><td class="num" id="LN285">285</td><td class="line"> <span class='keyword'>struct</span> file_descriptor* descriptor, <span class='keyword'>struct</span> dirent* buffer,</td></tr>
365<tr><td class="num" id="LN286">286</td><td class="line"> size_t bufferSize, uint32* _count);</td></tr>
366<tr><td class="num" id="LN287">287</td><td class="line"><span class='keyword'>static</span> status_t dir_read(<span class='keyword'>struct</span> io_context* ioContext, <span class='keyword'>struct</span> vnode* vnode,</td></tr>
367<tr><td class="num" id="LN288">288</td><td class="line"> <span class='keyword'>void</span>* cookie, <span class='keyword'>struct</span> dirent* buffer, size_t bufferSize, uint32* _count);</td></tr>
368<tr><td class="num" id="LN289">289</td><td class="line"><span class='keyword'>static</span> status_t dir_rewind(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
369<tr><td class="num" id="LN290">290</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> dir_free_fd(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
370<tr><td class="num" id="LN291">291</td><td class="line"><span class='keyword'>static</span> status_t dir_close(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
371<tr><td class="num" id="LN292">292</td><td class="line"><span class='keyword'>static</span> status_t attr_dir_read(<span class='keyword'>struct</span> io_context* context,</td></tr>
372<tr><td class="num" id="LN293">293</td><td class="line"> <span class='keyword'>struct</span> file_descriptor* descriptor, <span class='keyword'>struct</span> dirent* buffer,</td></tr>
373<tr><td class="num" id="LN294">294</td><td class="line"> size_t bufferSize, uint32* _count);</td></tr>
374<tr><td class="num" id="LN295">295</td><td class="line"><span class='keyword'>static</span> status_t attr_dir_rewind(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
375<tr><td class="num" id="LN296">296</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> attr_dir_free_fd(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
376<tr><td class="num" id="LN297">297</td><td class="line"><span class='keyword'>static</span> status_t attr_dir_close(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
377<tr><td class="num" id="LN298">298</td><td class="line"><span class='keyword'>static</span> status_t attr_read(<span class='keyword'>struct</span> file_descriptor* descriptor, off_t pos,</td></tr>
378<tr><td class="num" id="LN299">299</td><td class="line"> <span class='keyword'>void</span>* buffer, size_t* _bytes);</td></tr>
379<tr><td class="num" id="LN300">300</td><td class="line"><span class='keyword'>static</span> status_t attr_write(<span class='keyword'>struct</span> file_descriptor* descriptor, off_t pos,</td></tr>
380<tr><td class="num" id="LN301">301</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>void</span>* buffer, size_t* _bytes);</td></tr>
381<tr><td class="num" id="LN302">302</td><td class="line"><span class='keyword'>static</span> off_t attr_seek(<span class='keyword'>struct</span> file_descriptor* descriptor, off_t pos,</td></tr>
382<tr><td class="num" id="LN303">303</td><td class="line"> <span class='keyword'>int</span> seekType);</td></tr>
383<tr><td class="num" id="LN304">304</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> attr_free_fd(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
384<tr><td class="num" id="LN305">305</td><td class="line"><span class='keyword'>static</span> status_t attr_close(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
385<tr><td class="num" id="LN306">306</td><td class="line"><span class='keyword'>static</span> status_t attr_read_stat(<span class='keyword'>struct</span> file_descriptor* descriptor,</td></tr>
386<tr><td class="num" id="LN307">307</td><td class="line"> <span class='keyword'>struct</span> stat* statData);</td></tr>
387<tr><td class="num" id="LN308">308</td><td class="line"><span class='keyword'>static</span> status_t attr_write_stat(<span class='keyword'>struct</span> file_descriptor* descriptor,</td></tr>
388<tr><td class="num" id="LN309">309</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>struct</span> stat* stat, <span class='keyword'>int</span> statMask);</td></tr>
389<tr><td class="num" id="LN310">310</td><td class="line"><span class='keyword'>static</span> status_t index_dir_read(<span class='keyword'>struct</span> io_context* context,</td></tr>
390<tr><td class="num" id="LN311">311</td><td class="line"> <span class='keyword'>struct</span> file_descriptor* descriptor, <span class='keyword'>struct</span> dirent* buffer,</td></tr>
391<tr><td class="num" id="LN312">312</td><td class="line"> size_t bufferSize, uint32* _count);</td></tr>
392<tr><td class="num" id="LN313">313</td><td class="line"><span class='keyword'>static</span> status_t index_dir_rewind(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
393<tr><td class="num" id="LN314">314</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> index_dir_free_fd(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
394<tr><td class="num" id="LN315">315</td><td class="line"><span class='keyword'>static</span> status_t index_dir_close(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
395<tr><td class="num" id="LN316">316</td><td class="line"><span class='keyword'>static</span> status_t query_read(<span class='keyword'>struct</span> io_context* context,</td></tr>
396<tr><td class="num" id="LN317">317</td><td class="line"> <span class='keyword'>struct</span> file_descriptor* descriptor, <span class='keyword'>struct</span> dirent* buffer,</td></tr>
397<tr><td class="num" id="LN318">318</td><td class="line"> size_t bufferSize, uint32* _count);</td></tr>
398<tr><td class="num" id="LN319">319</td><td class="line"><span class='keyword'>static</span> status_t query_rewind(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
399<tr><td class="num" id="LN320">320</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> query_free_fd(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
400<tr><td class="num" id="LN321">321</td><td class="line"><span class='keyword'>static</span> status_t query_close(<span class='keyword'>struct</span> file_descriptor* descriptor);</td></tr>
401<tr><td class="num" id="LN322">322</td><td class="line"> </td></tr>
402<tr><td class="num" id="LN323">323</td><td class="line"><span class='keyword'>static</span> status_t common_ioctl(<span class='keyword'>struct</span> file_descriptor* descriptor, ulong op,</td></tr>
403<tr><td class="num" id="LN324">324</td><td class="line"> <span class='keyword'>void</span>* buffer, size_t length);</td></tr>
404<tr><td class="num" id="LN325">325</td><td class="line"><span class='keyword'>static</span> status_t common_read_stat(<span class='keyword'>struct</span> file_descriptor* descriptor,</td></tr>
405<tr><td class="num" id="LN326">326</td><td class="line"> <span class='keyword'>struct</span> stat* statData);</td></tr>
406<tr><td class="num" id="LN327">327</td><td class="line"><span class='keyword'>static</span> status_t common_write_stat(<span class='keyword'>struct</span> file_descriptor* descriptor,</td></tr>
407<tr><td class="num" id="LN328">328</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>struct</span> stat* statData, <span class='keyword'>int</span> statMask);</td></tr>
408<tr><td class="num" id="LN329">329</td><td class="line"><span class='keyword'>static</span> status_t common_path_read_stat(<span class='keyword'>int</span> fd, <span class='keyword'>char</span>* path, <span class='keyword'>bool</span> traverseLeafLink,</td></tr>
409<tr><td class="num" id="LN330">330</td><td class="line"> <span class='keyword'>struct</span> stat* stat, <span class='keyword'>bool</span> kernel);</td></tr>
410<tr><td class="num" id="LN331">331</td><td class="line"> </td></tr>
411<tr><td class="num" id="LN332">332</td><td class="line"><span class='keyword'>static</span> status_t vnode_path_to_vnode(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>char</span>* path,</td></tr>
412<tr><td class="num" id="LN333">333</td><td class="line"> <span class='keyword'>bool</span> traverseLeafLink, <span class='keyword'>int</span> count, <span class='keyword'>bool</span> kernel,</td></tr>
413<tr><td class="num" id="LN334">334</td><td class="line"> <span class='keyword'>struct</span> vnode** _vnode, ino_t* _parentID);</td></tr>
414<tr><td class="num" id="LN335">335</td><td class="line"><span class='keyword'>static</span> status_t dir_vnode_to_path(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>char</span>* buffer,</td></tr>
415<tr><td class="num" id="LN336">336</td><td class="line"> size_t bufferSize, <span class='keyword'>bool</span> kernel);</td></tr>
416<tr><td class="num" id="LN337">337</td><td class="line"><span class='keyword'>static</span> status_t fd_and_path_to_vnode(<span class='keyword'>int</span> fd, <span class='keyword'>char</span>* path, <span class='keyword'>bool</span> traverseLeafLink,</td></tr>
417<tr><td class="num" id="LN338">338</td><td class="line"> <span class='keyword'>struct</span> vnode** _vnode, ino_t* _parentID, <span class='keyword'>bool</span> kernel);</td></tr>
418<tr><td class="num" id="LN339">339</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span> inc_vnode_ref_count(<span class='keyword'>struct</span> vnode* vnode);</td></tr>
419<tr><td class="num" id="LN340">340</td><td class="line"><span class='keyword'>static</span> status_t dec_vnode_ref_count(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>bool</span> alwaysFree,</td></tr>
420<tr><td class="num" id="LN341">341</td><td class="line"> <span class='keyword'>bool</span> reenter);</td></tr>
421<tr><td class="num" id="LN342">342</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>inline</span> <span class='keyword'>void</span> put_vnode(<span class='keyword'>struct</span> vnode* vnode);</td></tr>
422<tr><td class="num" id="LN343">343</td><td class="line"><span class='keyword'>static</span> status_t fs_unmount(<span class='keyword'>char</span>* path, dev_t mountID, uint32 flags,</td></tr>
423<tr><td class="num" id="LN344">344</td><td class="line"> <span class='keyword'>bool</span> kernel);</td></tr>
424<tr><td class="num" id="LN345">345</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>int</span> open_vnode(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>int</span> openMode, <span class='keyword'>bool</span> kernel);</td></tr>
425<tr><td class="num" id="LN346">346</td><td class="line"> </td></tr>
426<tr><td class="num" id="LN347">347</td><td class="line"> </td></tr>
427<tr><td class="num" id="LN348">348</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fd_ops sFileOps = {</td></tr>
428<tr><td class="num" id="LN349">349</td><td class="line"> file_read,</td></tr>
429<tr><td class="num" id="LN350">350</td><td class="line"> file_write,</td></tr>
430<tr><td class="num" id="LN351">351</td><td class="line"> file_seek,</td></tr>
431<tr><td class="num" id="LN352">352</td><td class="line"> common_ioctl,</td></tr>
432<tr><td class="num" id="LN353">353</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// set_flags</span></td></tr>
433<tr><td class="num" id="LN354">354</td><td class="line"> file_select,</td></tr>
434<tr><td class="num" id="LN355">355</td><td class="line"> file_deselect,</td></tr>
435<tr><td class="num" id="LN356">356</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read_dir()</span></td></tr>
436<tr><td class="num" id="LN357">357</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// rewind_dir()</span></td></tr>
437<tr><td class="num" id="LN358">358</td><td class="line"> common_read_stat,</td></tr>
438<tr><td class="num" id="LN359">359</td><td class="line"> common_write_stat,</td></tr>
439<tr><td class="num" id="LN360">360</td><td class="line"> file_close,</td></tr>
440<tr><td class="num" id="LN361">361</td><td class="line"> file_free_fd</td></tr>
441<tr><td class="num" id="LN362">362</td><td class="line">};</td></tr>
442<tr><td class="num" id="LN363">363</td><td class="line"> </td></tr>
443<tr><td class="num" id="LN364">364</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fd_ops sDirectoryOps = {</td></tr>
444<tr><td class="num" id="LN365">365</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read()</span></td></tr>
445<tr><td class="num" id="LN366">366</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write()</span></td></tr>
446<tr><td class="num" id="LN367">367</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// seek()</span></td></tr>
447<tr><td class="num" id="LN368">368</td><td class="line"> common_ioctl,</td></tr>
448<tr><td class="num" id="LN369">369</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// set_flags</span></td></tr>
449<tr><td class="num" id="LN370">370</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// select()</span></td></tr>
450<tr><td class="num" id="LN371">371</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// deselect()</span></td></tr>
451<tr><td class="num" id="LN372">372</td><td class="line"> dir_read,</td></tr>
452<tr><td class="num" id="LN373">373</td><td class="line"> dir_rewind,</td></tr>
453<tr><td class="num" id="LN374">374</td><td class="line"> common_read_stat,</td></tr>
454<tr><td class="num" id="LN375">375</td><td class="line"> common_write_stat,</td></tr>
455<tr><td class="num" id="LN376">376</td><td class="line"> dir_close,</td></tr>
456<tr><td class="num" id="LN377">377</td><td class="line"> dir_free_fd</td></tr>
457<tr><td class="num" id="LN378">378</td><td class="line">};</td></tr>
458<tr><td class="num" id="LN379">379</td><td class="line"> </td></tr>
459<tr><td class="num" id="LN380">380</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fd_ops sAttributeDirectoryOps = {</td></tr>
460<tr><td class="num" id="LN381">381</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read()</span></td></tr>
461<tr><td class="num" id="LN382">382</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write()</span></td></tr>
462<tr><td class="num" id="LN383">383</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// seek()</span></td></tr>
463<tr><td class="num" id="LN384">384</td><td class="line"> common_ioctl,</td></tr>
464<tr><td class="num" id="LN385">385</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// set_flags</span></td></tr>
465<tr><td class="num" id="LN386">386</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// select()</span></td></tr>
466<tr><td class="num" id="LN387">387</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// deselect()</span></td></tr>
467<tr><td class="num" id="LN388">388</td><td class="line"> attr_dir_read,</td></tr>
468<tr><td class="num" id="LN389">389</td><td class="line"> attr_dir_rewind,</td></tr>
469<tr><td class="num" id="LN390">390</td><td class="line"> common_read_stat,</td></tr>
470<tr><td class="num" id="LN391">391</td><td class="line"> common_write_stat,</td></tr>
471<tr><td class="num" id="LN392">392</td><td class="line"> attr_dir_close,</td></tr>
472<tr><td class="num" id="LN393">393</td><td class="line"> attr_dir_free_fd</td></tr>
473<tr><td class="num" id="LN394">394</td><td class="line">};</td></tr>
474<tr><td class="num" id="LN395">395</td><td class="line"> </td></tr>
475<tr><td class="num" id="LN396">396</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fd_ops sAttributeOps = {</td></tr>
476<tr><td class="num" id="LN397">397</td><td class="line"> attr_read,</td></tr>
477<tr><td class="num" id="LN398">398</td><td class="line"> attr_write,</td></tr>
478<tr><td class="num" id="LN399">399</td><td class="line"> attr_seek,</td></tr>
479<tr><td class="num" id="LN400">400</td><td class="line"> common_ioctl,</td></tr>
480<tr><td class="num" id="LN401">401</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// set_flags</span></td></tr>
481<tr><td class="num" id="LN402">402</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// select()</span></td></tr>
482<tr><td class="num" id="LN403">403</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// deselect()</span></td></tr>
483<tr><td class="num" id="LN404">404</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read_dir()</span></td></tr>
484<tr><td class="num" id="LN405">405</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// rewind_dir()</span></td></tr>
485<tr><td class="num" id="LN406">406</td><td class="line"> attr_read_stat,</td></tr>
486<tr><td class="num" id="LN407">407</td><td class="line"> attr_write_stat,</td></tr>
487<tr><td class="num" id="LN408">408</td><td class="line"> attr_close,</td></tr>
488<tr><td class="num" id="LN409">409</td><td class="line"> attr_free_fd</td></tr>
489<tr><td class="num" id="LN410">410</td><td class="line">};</td></tr>
490<tr><td class="num" id="LN411">411</td><td class="line"> </td></tr>
491<tr><td class="num" id="LN412">412</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fd_ops sIndexDirectoryOps = {</td></tr>
492<tr><td class="num" id="LN413">413</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read()</span></td></tr>
493<tr><td class="num" id="LN414">414</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write()</span></td></tr>
494<tr><td class="num" id="LN415">415</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// seek()</span></td></tr>
495<tr><td class="num" id="LN416">416</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// ioctl()</span></td></tr>
496<tr><td class="num" id="LN417">417</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// set_flags</span></td></tr>
497<tr><td class="num" id="LN418">418</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// select()</span></td></tr>
498<tr><td class="num" id="LN419">419</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// deselect()</span></td></tr>
499<tr><td class="num" id="LN420">420</td><td class="line"> index_dir_read,</td></tr>
500<tr><td class="num" id="LN421">421</td><td class="line"> index_dir_rewind,</td></tr>
501<tr><td class="num" id="LN422">422</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read_stat()</span></td></tr>
502<tr><td class="num" id="LN423">423</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write_stat()</span></td></tr>
503<tr><td class="num" id="LN424">424</td><td class="line"> index_dir_close,</td></tr>
504<tr><td class="num" id="LN425">425</td><td class="line"> index_dir_free_fd</td></tr>
505<tr><td class="num" id="LN426">426</td><td class="line">};</td></tr>
506<tr><td class="num" id="LN427">427</td><td class="line"> </td></tr>
507<tr><td class="num" id="LN428">428</td><td class="line"><span class='directive'>#if 0</span></td></tr>
508<tr><td class="num" id="LN429">429</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fd_ops sIndexOps = {</td></tr>
509<tr><td class="num" id="LN430">430</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read()</span></td></tr>
510<tr><td class="num" id="LN431">431</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write()</span></td></tr>
511<tr><td class="num" id="LN432">432</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// seek()</span></td></tr>
512<tr><td class="num" id="LN433">433</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// ioctl()</span></td></tr>
513<tr><td class="num" id="LN434">434</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// set_flags</span></td></tr>
514<tr><td class="num" id="LN435">435</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// select()</span></td></tr>
515<tr><td class="num" id="LN436">436</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// deselect()</span></td></tr>
516<tr><td class="num" id="LN437">437</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// dir_read()</span></td></tr>
517<tr><td class="num" id="LN438">438</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// dir_rewind()</span></td></tr>
518<tr><td class="num" id="LN439">439</td><td class="line"> index_read_stat, <span class='comment'>// read_stat()</span></td></tr>
519<tr><td class="num" id="LN440">440</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write_stat()</span></td></tr>
520<tr><td class="num" id="LN441">441</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// dir_close()</span></td></tr>
521<tr><td class="num" id="LN442">442</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span> <span class='comment'>// free_fd()</span></td></tr>
522<tr><td class="num" id="LN443">443</td><td class="line">};</td></tr>
523<tr><td class="num" id="LN444">444</td><td class="line"><span class='directive'>#endif</span></td></tr>
524<tr><td class="num" id="LN445">445</td><td class="line"> </td></tr>
525<tr><td class="num" id="LN446">446</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fd_ops sQueryOps = {</td></tr>
526<tr><td class="num" id="LN447">447</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read()</span></td></tr>
527<tr><td class="num" id="LN448">448</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write()</span></td></tr>
528<tr><td class="num" id="LN449">449</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// seek()</span></td></tr>
529<tr><td class="num" id="LN450">450</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// ioctl()</span></td></tr>
530<tr><td class="num" id="LN451">451</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// set_flags</span></td></tr>
531<tr><td class="num" id="LN452">452</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// select()</span></td></tr>
532<tr><td class="num" id="LN453">453</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// deselect()</span></td></tr>
533<tr><td class="num" id="LN454">454</td><td class="line"> query_read,</td></tr>
534<tr><td class="num" id="LN455">455</td><td class="line"> query_rewind,</td></tr>
535<tr><td class="num" id="LN456">456</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// read_stat()</span></td></tr>
536<tr><td class="num" id="LN457">457</td><td class="line"> <span class='macro'>NULL<span class='expansion'>__null</span></span>, <span class='comment'>// write_stat()</span></td></tr>
537<tr><td class="num" id="LN458">458</td><td class="line"> query_close,</td></tr>
538<tr><td class="num" id="LN459">459</td><td class="line"> query_free_fd</td></tr>
539<tr><td class="num" id="LN460">460</td><td class="line">};</td></tr>
540<tr><td class="num" id="LN461">461</td><td class="line"> </td></tr>
541<tr><td class="num" id="LN462">462</td><td class="line"> </td></tr>
542<tr><td class="num" id="LN463">463</td><td class="line"><span class='comment'>// VNodePutter</span></td></tr>
543<tr><td class="num" id="LN464">464</td><td class="line"><span class='keyword'>class</span> VNodePutter {</td></tr>
544<tr><td class="num" id="LN465">465</td><td class="line"><span class='keyword'>public</span>:</td></tr>
545<tr><td class="num" id="LN466">466</td><td class="line"> VNodePutter(<span class='keyword'>struct</span> vnode* vnode = <span class='macro'>NULL<span class='expansion'>__null</span></span>) : fVNode(vnode) {}</td></tr>
546<tr><td class="num" id="LN467">467</td><td class="line"> </td></tr>
547<tr><td class="num" id="LN468">468</td><td class="line"> ~VNodePutter()</td></tr>
548<tr><td class="num" id="LN469">469</td><td class="line"> {</td></tr>
549<tr><td class="num" id="LN470">470</td><td class="line"> Put();</td></tr>
550<tr><td class="num" id="LN471">471</td><td class="line"> }</td></tr>
551<tr><td class="num" id="LN472">472</td><td class="line"> </td></tr>
552<tr><td class="num" id="LN473">473</td><td class="line"> <span class='keyword'>void</span> SetTo(<span class='keyword'>struct</span> vnode* vnode)</td></tr>
553<tr><td class="num" id="LN474">474</td><td class="line"> {</td></tr>
554<tr><td class="num" id="LN475">475</td><td class="line"> Put();</td></tr>
555<tr><td class="num" id="LN476">476</td><td class="line"> fVNode = vnode;</td></tr>
556<tr><td class="num" id="LN477">477</td><td class="line"> }</td></tr>
557<tr><td class="num" id="LN478">478</td><td class="line"> </td></tr>
558<tr><td class="num" id="LN479">479</td><td class="line"> <span class='keyword'>void</span> Put()</td></tr>
559<tr><td class="num" id="LN480">480</td><td class="line"> {</td></tr>
560<tr><td class="num" id="LN481">481</td><td class="line"> <span class='keyword'>if</span> (fVNode) {</td></tr>
561<tr><td class="num" id="LN482">482</td><td class="line"> put_vnode(fVNode);</td></tr>
562<tr><td class="num" id="LN483">483</td><td class="line"> fVNode = <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
563<tr><td class="num" id="LN484">484</td><td class="line"> }</td></tr>
564<tr><td class="num" id="LN485">485</td><td class="line"> }</td></tr>
565<tr><td class="num" id="LN486">486</td><td class="line"> </td></tr>
566<tr><td class="num" id="LN487">487</td><td class="line"> <span class='keyword'>struct</span> vnode* Detach()</td></tr>
567<tr><td class="num" id="LN488">488</td><td class="line"> {</td></tr>
568<tr><td class="num" id="LN489">489</td><td class="line"> <span class='keyword'>struct</span> vnode* vnode = fVNode;</td></tr>
569<tr><td class="num" id="LN490">490</td><td class="line"> fVNode = <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
570<tr><td class="num" id="LN491">491</td><td class="line"> <span class='keyword'>return</span> vnode;</td></tr>
571<tr><td class="num" id="LN492">492</td><td class="line"> }</td></tr>
572<tr><td class="num" id="LN493">493</td><td class="line"> </td></tr>
573<tr><td class="num" id="LN494">494</td><td class="line"><span class='keyword'>private</span>:</td></tr>
574<tr><td class="num" id="LN495">495</td><td class="line"> <span class='keyword'>struct</span> vnode* fVNode;</td></tr>
575<tr><td class="num" id="LN496">496</td><td class="line">};</td></tr>
576<tr><td class="num" id="LN497">497</td><td class="line"> </td></tr>
577<tr><td class="num" id="LN498">498</td><td class="line"> </td></tr>
578<tr><td class="num" id="LN499">499</td><td class="line"><span class='keyword'>class</span> FDCloser {</td></tr>
579<tr><td class="num" id="LN500">500</td><td class="line"><span class='keyword'>public</span>:</td></tr>
580<tr><td class="num" id="LN501">501</td><td class="line"> FDCloser() : fFD(-1), fKernel(<span class='keyword'>true</span>) {}</td></tr>
581<tr><td class="num" id="LN502">502</td><td class="line"> </td></tr>
582<tr><td class="num" id="LN503">503</td><td class="line"> FDCloser(<span class='keyword'>int</span> fd, <span class='keyword'>bool</span> kernel) : fFD(fd), fKernel(kernel) {}</td></tr>
583<tr><td class="num" id="LN504">504</td><td class="line"> </td></tr>
584<tr><td class="num" id="LN505">505</td><td class="line"> ~FDCloser()</td></tr>
585<tr><td class="num" id="LN506">506</td><td class="line"> {</td></tr>
586<tr><td class="num" id="LN507">507</td><td class="line"> Close();</td></tr>
587<tr><td class="num" id="LN508">508</td><td class="line"> }</td></tr>
588<tr><td class="num" id="LN509">509</td><td class="line"> </td></tr>
589<tr><td class="num" id="LN510">510</td><td class="line"> <span class='keyword'>void</span> SetTo(<span class='keyword'>int</span> fd, <span class='keyword'>bool</span> kernel)</td></tr>
590<tr><td class="num" id="LN511">511</td><td class="line"> {</td></tr>
591<tr><td class="num" id="LN512">512</td><td class="line"> Close();</td></tr>
592<tr><td class="num" id="LN513">513</td><td class="line"> fFD = fd;</td></tr>
593<tr><td class="num" id="LN514">514</td><td class="line"> fKernel = kernel;</td></tr>
594<tr><td class="num" id="LN515">515</td><td class="line"> }</td></tr>
595<tr><td class="num" id="LN516">516</td><td class="line"> </td></tr>
596<tr><td class="num" id="LN517">517</td><td class="line"> <span class='keyword'>void</span> Close()</td></tr>
597<tr><td class="num" id="LN518">518</td><td class="line"> {</td></tr>
598<tr><td class="num" id="LN519">519</td><td class="line"> <span class='keyword'>if</span> (fFD &gt;= 0) {</td></tr>
599<tr><td class="num" id="LN520">520</td><td class="line"> <span class='keyword'>if</span> (fKernel)</td></tr>
600<tr><td class="num" id="LN521">521</td><td class="line"> _kern_close(fFD);</td></tr>
601<tr><td class="num" id="LN522">522</td><td class="line"> <span class='keyword'>else</span></td></tr>
602<tr><td class="num" id="LN523">523</td><td class="line"> _user_close(fFD);</td></tr>
603<tr><td class="num" id="LN524">524</td><td class="line"> fFD = -1;</td></tr>
604<tr><td class="num" id="LN525">525</td><td class="line"> }</td></tr>
605<tr><td class="num" id="LN526">526</td><td class="line"> }</td></tr>
606<tr><td class="num" id="LN527">527</td><td class="line"> </td></tr>
607<tr><td class="num" id="LN528">528</td><td class="line"> <span class='keyword'>int</span> Detach()</td></tr>
608<tr><td class="num" id="LN529">529</td><td class="line"> {</td></tr>
609<tr><td class="num" id="LN530">530</td><td class="line"> <span class='keyword'>int</span> fd = fFD;</td></tr>
610<tr><td class="num" id="LN531">531</td><td class="line"> fFD = -1;</td></tr>
611<tr><td class="num" id="LN532">532</td><td class="line"> <span class='keyword'>return</span> fd;</td></tr>
612<tr><td class="num" id="LN533">533</td><td class="line"> }</td></tr>
613<tr><td class="num" id="LN534">534</td><td class="line"> </td></tr>
614<tr><td class="num" id="LN535">535</td><td class="line"><span class='keyword'>private</span>:</td></tr>
615<tr><td class="num" id="LN536">536</td><td class="line"> <span class='keyword'>int</span> fFD;</td></tr>
616<tr><td class="num" id="LN537">537</td><td class="line"> <span class='keyword'>bool</span> fKernel;</td></tr>
617<tr><td class="num" id="LN538">538</td><td class="line">};</td></tr>
618<tr><td class="num" id="LN539">539</td><td class="line"> </td></tr>
619<tr><td class="num" id="LN540">540</td><td class="line"> </td></tr>
620<tr><td class="num" id="LN541">541</td><td class="line"><span class='directive'>#if VFS_PAGES_IO_TRACING</span></td></tr>
621<tr><td class="num" id="LN542">542</td><td class="line"> </td></tr>
622<tr><td class="num" id="LN543">543</td><td class="line"><span class='keyword'>namespace</span> VFSPagesIOTracing {</td></tr>
623<tr><td class="num" id="LN544">544</td><td class="line"> </td></tr>
624<tr><td class="num" id="LN545">545</td><td class="line"><span class='keyword'>class</span> PagesIOTraceEntry : <span class='keyword'>public</span> AbstractTraceEntry {</td></tr>
625<tr><td class="num" id="LN546">546</td><td class="line"><span class='keyword'>protected</span>:</td></tr>
626<tr><td class="num" id="LN547">547</td><td class="line"> PagesIOTraceEntry(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>void</span>* cookie, off_t pos,</td></tr>
627<tr><td class="num" id="LN548">548</td><td class="line"> <span class='keyword'>const</span> generic_io_vec* vecs, uint32 count, uint32 flags,</td></tr>
628<tr><td class="num" id="LN549">549</td><td class="line"> generic_size_t bytesRequested, status_t status,</td></tr>
629<tr><td class="num" id="LN550">550</td><td class="line"> generic_size_t bytesTransferred)</td></tr>
630<tr><td class="num" id="LN551">551</td><td class="line"> :</td></tr>
631<tr><td class="num" id="LN552">552</td><td class="line"> fVnode(vnode),</td></tr>
632<tr><td class="num" id="LN553">553</td><td class="line"> fMountID(vnode-&gt;mount-&gt;id),</td></tr>
633<tr><td class="num" id="LN554">554</td><td class="line"> fNodeID(vnode-&gt;id),</td></tr>
634<tr><td class="num" id="LN555">555</td><td class="line"> fCookie(cookie),</td></tr>
635<tr><td class="num" id="LN556">556</td><td class="line"> fPos(pos),</td></tr>
636<tr><td class="num" id="LN557">557</td><td class="line"> fCount(count),</td></tr>
637<tr><td class="num" id="LN558">558</td><td class="line"> fFlags(flags),</td></tr>
638<tr><td class="num" id="LN559">559</td><td class="line"> fBytesRequested(bytesRequested),</td></tr>
639<tr><td class="num" id="LN560">560</td><td class="line"> fStatus(status),</td></tr>
640<tr><td class="num" id="LN561">561</td><td class="line"> fBytesTransferred(bytesTransferred)</td></tr>
641<tr><td class="num" id="LN562">562</td><td class="line"> {</td></tr>
642<tr><td class="num" id="LN563">563</td><td class="line"> fVecs = (generic_io_vec*)alloc_tracing_buffer_memcpy(vecs,</td></tr>
643<tr><td class="num" id="LN564">564</td><td class="line"> <span class='keyword'>sizeof</span>(generic_io_vec) * count, <span class='keyword'>false</span>);</td></tr>
644<tr><td class="num" id="LN565">565</td><td class="line"> }</td></tr>
645<tr><td class="num" id="LN566">566</td><td class="line"> </td></tr>
646<tr><td class="num" id="LN567">567</td><td class="line"> <span class='keyword'>void</span> AddDump(TraceOutput&amp; out, <span class='keyword'>const</span> <span class='keyword'>char</span>* mode)</td></tr>
647<tr><td class="num" id="LN568">568</td><td class="line"> {</td></tr>
648<tr><td class="num" id="LN569">569</td><td class="line"> out.Print(<span class='string_literal'>"vfs pages io %5s: vnode: %p (%"</span> <span class='macro'>B_PRId32<span class='expansion'>"l" "d"</span></span> <span class='string_literal'>", %"</span> <span class='macro'>B_PRId64<span class='expansion'>"ll" "d"</span></span> <span class='string_literal'>"), "</span></td></tr>
649<tr><td class="num" id="LN570">570</td><td class="line"> <span class='string_literal'>"cookie: %p, pos: %"</span> <span class='macro'>B_PRIdOFF<span class='expansion'>"ll" "d"</span></span> <span class='string_literal'>", size: %"</span> <span class='macro'>B_PRIu64<span class='expansion'>"ll" "u"</span></span> <span class='string_literal'>", vecs: {"</span>,</td></tr>
650<tr><td class="num" id="LN571">571</td><td class="line"> mode, fVnode, fMountID, fNodeID, fCookie, fPos,</td></tr>
651<tr><td class="num" id="LN572">572</td><td class="line"> (uint64)fBytesRequested);</td></tr>
652<tr><td class="num" id="LN573">573</td><td class="line"> </td></tr>
653<tr><td class="num" id="LN574">574</td><td class="line"> <span class='keyword'>if</span> (fVecs != <span class='macro'>NULL<span class='expansion'>__null</span></span>) {</td></tr>
654<tr><td class="num" id="LN575">575</td><td class="line"> <span class='keyword'>for</span> (uint32 i = 0; i &lt; fCount; i++) {</td></tr>
655<tr><td class="num" id="LN576">576</td><td class="line"> <span class='keyword'>if</span> (i &gt; 0)</td></tr>
656<tr><td class="num" id="LN577">577</td><td class="line"> out.Print(<span class='string_literal'>", "</span>);</td></tr>
657<tr><td class="num" id="LN578">578</td><td class="line"> out.Print(<span class='string_literal'>"(%"</span> <span class='macro'>B_PRIx64<span class='expansion'>"ll" "x"</span></span> <span class='string_literal'>", %"</span> <span class='macro'>B_PRIu64<span class='expansion'>"ll" "u"</span></span> <span class='string_literal'>")"</span>, (uint64)fVecs[i].base,</td></tr>
658<tr><td class="num" id="LN579">579</td><td class="line"> (uint64)fVecs[i].length);</td></tr>
659<tr><td class="num" id="LN580">580</td><td class="line"> }</td></tr>
660<tr><td class="num" id="LN581">581</td><td class="line"> }</td></tr>
661<tr><td class="num" id="LN582">582</td><td class="line"> </td></tr>
662<tr><td class="num" id="LN583">583</td><td class="line"> out.Print(<span class='string_literal'>"}, flags: %#"</span> <span class='macro'>B_PRIx32<span class='expansion'>"l" "x"</span></span> <span class='string_literal'>" -&gt; status: %#"</span> <span class='macro'>B_PRIx32<span class='expansion'>"l" "x"</span></span> <span class='string_literal'>", "</span></td></tr>
663<tr><td class="num" id="LN584">584</td><td class="line"> <span class='string_literal'>"transferred: %"</span> <span class='macro'>B_PRIu64<span class='expansion'>"ll" "u"</span></span>, fFlags, fStatus,</td></tr>
664<tr><td class="num" id="LN585">585</td><td class="line"> (uint64)fBytesTransferred);</td></tr>
665<tr><td class="num" id="LN586">586</td><td class="line"> }</td></tr>
666<tr><td class="num" id="LN587">587</td><td class="line"> </td></tr>
667<tr><td class="num" id="LN588">588</td><td class="line"><span class='keyword'>protected</span>:</td></tr>
668<tr><td class="num" id="LN589">589</td><td class="line"> <span class='keyword'>struct</span> vnode* fVnode;</td></tr>
669<tr><td class="num" id="LN590">590</td><td class="line"> dev_t fMountID;</td></tr>
670<tr><td class="num" id="LN591">591</td><td class="line"> ino_t fNodeID;</td></tr>
671<tr><td class="num" id="LN592">592</td><td class="line"> <span class='keyword'>void</span>* fCookie;</td></tr>
672<tr><td class="num" id="LN593">593</td><td class="line"> off_t fPos;</td></tr>
673<tr><td class="num" id="LN594">594</td><td class="line"> generic_io_vec* fVecs;</td></tr>
674<tr><td class="num" id="LN595">595</td><td class="line"> uint32 fCount;</td></tr>
675<tr><td class="num" id="LN596">596</td><td class="line"> uint32 fFlags;</td></tr>
676<tr><td class="num" id="LN597">597</td><td class="line"> generic_size_t fBytesRequested;</td></tr>
677<tr><td class="num" id="LN598">598</td><td class="line"> status_t fStatus;</td></tr>
678<tr><td class="num" id="LN599">599</td><td class="line"> generic_size_t fBytesTransferred;</td></tr>
679<tr><td class="num" id="LN600">600</td><td class="line">};</td></tr>
680<tr><td class="num" id="LN601">601</td><td class="line"> </td></tr>
681<tr><td class="num" id="LN602">602</td><td class="line"> </td></tr>
682<tr><td class="num" id="LN603">603</td><td class="line"><span class='keyword'>class</span> ReadPages : <span class='keyword'>public</span> PagesIOTraceEntry {</td></tr>
683<tr><td class="num" id="LN604">604</td><td class="line"><span class='keyword'>public</span>:</td></tr>
684<tr><td class="num" id="LN605">605</td><td class="line"> ReadPages(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>void</span>* cookie, off_t pos,</td></tr>
685<tr><td class="num" id="LN606">606</td><td class="line"> <span class='keyword'>const</span> generic_io_vec* vecs, uint32 count, uint32 flags,</td></tr>
686<tr><td class="num" id="LN607">607</td><td class="line"> generic_size_t bytesRequested, status_t status,</td></tr>
687<tr><td class="num" id="LN608">608</td><td class="line"> generic_size_t bytesTransferred)</td></tr>
688<tr><td class="num" id="LN609">609</td><td class="line"> :</td></tr>
689<tr><td class="num" id="LN610">610</td><td class="line"> PagesIOTraceEntry(vnode, cookie, pos, vecs, count, flags,</td></tr>
690<tr><td class="num" id="LN611">611</td><td class="line"> bytesRequested, status, bytesTransferred)</td></tr>
691<tr><td class="num" id="LN612">612</td><td class="line"> {</td></tr>
692<tr><td class="num" id="LN613">613</td><td class="line"> Initialized();</td></tr>
693<tr><td class="num" id="LN614">614</td><td class="line"> }</td></tr>
694<tr><td class="num" id="LN615">615</td><td class="line"> </td></tr>
695<tr><td class="num" id="LN616">616</td><td class="line"> <span class='keyword'>virtual</span> <span class='keyword'>void</span> AddDump(TraceOutput&amp; out)</td></tr>
696<tr><td class="num" id="LN617">617</td><td class="line"> {</td></tr>
697<tr><td class="num" id="LN618">618</td><td class="line"> PagesIOTraceEntry::AddDump(out, <span class='string_literal'>"read"</span>);</td></tr>
698<tr><td class="num" id="LN619">619</td><td class="line"> }</td></tr>
699<tr><td class="num" id="LN620">620</td><td class="line">};</td></tr>
700<tr><td class="num" id="LN621">621</td><td class="line"> </td></tr>
701<tr><td class="num" id="LN622">622</td><td class="line"> </td></tr>
702<tr><td class="num" id="LN623">623</td><td class="line"><span class='keyword'>class</span> WritePages : <span class='keyword'>public</span> PagesIOTraceEntry {</td></tr>
703<tr><td class="num" id="LN624">624</td><td class="line"><span class='keyword'>public</span>:</td></tr>
704<tr><td class="num" id="LN625">625</td><td class="line"> WritePages(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>void</span>* cookie, off_t pos,</td></tr>
705<tr><td class="num" id="LN626">626</td><td class="line"> <span class='keyword'>const</span> generic_io_vec* vecs, uint32 count, uint32 flags,</td></tr>
706<tr><td class="num" id="LN627">627</td><td class="line"> generic_size_t bytesRequested, status_t status,</td></tr>
707<tr><td class="num" id="LN628">628</td><td class="line"> generic_size_t bytesTransferred)</td></tr>
708<tr><td class="num" id="LN629">629</td><td class="line"> :</td></tr>
709<tr><td class="num" id="LN630">630</td><td class="line"> PagesIOTraceEntry(vnode, cookie, pos, vecs, count, flags,</td></tr>
710<tr><td class="num" id="LN631">631</td><td class="line"> bytesRequested, status, bytesTransferred)</td></tr>
711<tr><td class="num" id="LN632">632</td><td class="line"> {</td></tr>
712<tr><td class="num" id="LN633">633</td><td class="line"> Initialized();</td></tr>
713<tr><td class="num" id="LN634">634</td><td class="line"> }</td></tr>
714<tr><td class="num" id="LN635">635</td><td class="line"> </td></tr>
715<tr><td class="num" id="LN636">636</td><td class="line"> <span class='keyword'>virtual</span> <span class='keyword'>void</span> AddDump(TraceOutput&amp; out)</td></tr>
716<tr><td class="num" id="LN637">637</td><td class="line"> {</td></tr>
717<tr><td class="num" id="LN638">638</td><td class="line"> PagesIOTraceEntry::AddDump(out, <span class='string_literal'>"write"</span>);</td></tr>
718<tr><td class="num" id="LN639">639</td><td class="line"> }</td></tr>
719<tr><td class="num" id="LN640">640</td><td class="line">};</td></tr>
720<tr><td class="num" id="LN641">641</td><td class="line"> </td></tr>
721<tr><td class="num" id="LN642">642</td><td class="line">} <span class='comment'>// namespace VFSPagesIOTracing</span></td></tr>
722<tr><td class="num" id="LN643">643</td><td class="line"> </td></tr>
723<tr><td class="num" id="LN644">644</td><td class="line"><span class='directive'># define <span class='macro'>TPIO(x)<span class='expansion'>;</span></span> new(std::nothrow) VFSPagesIOTracing::x;</span></td></tr>
724<tr><td class="num" id="LN645">645</td><td class="line"><span class='directive'>#else</span></td></tr>
725<tr><td class="num" id="LN646">646</td><td class="line"><span class='directive'># define <span class='macro'>TPIO(x)<span class='expansion'>;</span></span> ;</span></td></tr>
726<tr><td class="num" id="LN647">647</td><td class="line"><span class='directive'>#endif // VFS_PAGES_IO_TRACING</span></td></tr>
727<tr><td class="num" id="LN648">648</td><td class="line"> </td></tr>
728<tr><td class="num" id="LN649">649</td><td class="line"> </td></tr>
729<tr><td class="num" id="LN650">650</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>int</span></td></tr>
730<tr><td class="num" id="LN651">651</td><td class="line">mount_compare(<span class='keyword'>void</span>* _m, <span class='keyword'>const</span> <span class='keyword'>void</span>* _key)</td></tr>
731<tr><td class="num" id="LN652">652</td><td class="line">{</td></tr>
732<tr><td class="num" id="LN653">653</td><td class="line"> <span class='keyword'>struct</span> fs_mount* mount = (fs_mount*)_m;</td></tr>
733<tr><td class="num" id="LN654">654</td><td class="line"> <span class='keyword'>const</span> dev_t* id = (dev_t*)_key;</td></tr>
734<tr><td class="num" id="LN655">655</td><td class="line"> </td></tr>
735<tr><td class="num" id="LN656">656</td><td class="line"> <span class='keyword'>if</span> (mount-&gt;id == *id)</td></tr>
736<tr><td class="num" id="LN657">657</td><td class="line"> <span class='keyword'>return</span> 0;</td></tr>
737<tr><td class="num" id="LN658">658</td><td class="line"> </td></tr>
738<tr><td class="num" id="LN659">659</td><td class="line"> <span class='keyword'>return</span> -1;</td></tr>
739<tr><td class="num" id="LN660">660</td><td class="line">}</td></tr>
740<tr><td class="num" id="LN661">661</td><td class="line"> </td></tr>
741<tr><td class="num" id="LN662">662</td><td class="line"> </td></tr>
742<tr><td class="num" id="LN663">663</td><td class="line"><span class='keyword'>static</span> uint32</td></tr>
743<tr><td class="num" id="LN664">664</td><td class="line">mount_hash(<span class='keyword'>void</span>* _m, <span class='keyword'>const</span> <span class='keyword'>void</span>* _key, uint32 range)</td></tr>
744<tr><td class="num" id="LN665">665</td><td class="line">{</td></tr>
745<tr><td class="num" id="LN666">666</td><td class="line"> <span class='keyword'>struct</span> fs_mount* mount = (fs_mount*)_m;</td></tr>
746<tr><td class="num" id="LN667">667</td><td class="line"> <span class='keyword'>const</span> dev_t* id = (dev_t*)_key;</td></tr>
747<tr><td class="num" id="LN668">668</td><td class="line"> </td></tr>
748<tr><td class="num" id="LN669">669</td><td class="line"> <span class='keyword'>if</span> (mount)</td></tr>
749<tr><td class="num" id="LN670">670</td><td class="line"> <span class='keyword'>return</span> mount-&gt;id % range;</td></tr>
750<tr><td class="num" id="LN671">671</td><td class="line"> </td></tr>
751<tr><td class="num" id="LN672">672</td><td class="line"> <span class='keyword'>return</span> (uint32)*id % range;</td></tr>
752<tr><td class="num" id="LN673">673</td><td class="line">}</td></tr>
753<tr><td class="num" id="LN674">674</td><td class="line"> </td></tr>
754<tr><td class="num" id="LN675">675</td><td class="line"> </td></tr>
755<tr><td class="num" id="LN676">676</td><td class="line"><span class='comment'>/*! Finds the mounted device (the fs_mount structure) with the given ID.</span></td></tr>
756<tr><td class="num" id="LN677">677</td><td class="line"> <span class='comment'>Note, you must hold the gMountMutex lock when you call this function.</span></td></tr>
757<tr><td class="num" id="LN678">678</td><td class="line"><span class='comment'>*/</span></td></tr>
758<tr><td class="num" id="LN679">679</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> fs_mount*</td></tr>
759<tr><td class="num" id="LN680">680</td><td class="line">find_mount(dev_t id)</td></tr>
760<tr><td class="num" id="LN681">681</td><td class="line">{</td></tr>
761<tr><td class="num" id="LN682">682</td><td class="line"> <span class='macro'>ASSERT_LOCKED_MUTEX(&amp;sMountMutex)<span class='expansion'>{ do { if (!(find_thread(__null) == (&amp;sMountMutex)-&gt;holder<br>)) { panic("ASSERT FAILED (%s:%d): %s", "/home/haiku/haiku/haiku/src/system/kernel/fs/vfs.cpp"<br>, 682, "find_thread(__null) == (&amp;sMountMutex)-&gt;holder"<br>); } } while (0); }</span></span>;</td></tr>
762<tr><td class="num" id="LN683">683</td><td class="line"> </td></tr>
763<tr><td class="num" id="LN684">684</td><td class="line"> <span class='keyword'>return</span> (fs_mount*)hash_lookup(sMountsTable, (<span class='keyword'>void</span>*)&amp;id);</td></tr>
764<tr><td class="num" id="LN685">685</td><td class="line">}</td></tr>
765<tr><td class="num" id="LN686">686</td><td class="line"> </td></tr>
766<tr><td class="num" id="LN687">687</td><td class="line"> </td></tr>
767<tr><td class="num" id="LN688">688</td><td class="line"><span class='keyword'>static</span> status_t</td></tr>
768<tr><td class="num" id="LN689">689</td><td class="line">get_mount(dev_t id, <span class='keyword'>struct</span> fs_mount** _mount)</td></tr>
769<tr><td class="num" id="LN690">690</td><td class="line">{</td></tr>
770<tr><td class="num" id="LN691">691</td><td class="line"> <span class='keyword'>struct</span> fs_mount* mount;</td></tr>
771<tr><td class="num" id="LN692">692</td><td class="line"> </td></tr>
772<tr><td class="num" id="LN693">693</td><td class="line"> ReadLocker nodeLocker(sVnodeLock);</td></tr>
773<tr><td class="num" id="LN694">694</td><td class="line"> MutexLocker mountLocker(sMountMutex);</td></tr>
774<tr><td class="num" id="LN695">695</td><td class="line"> </td></tr>
775<tr><td class="num" id="LN696">696</td><td class="line"> mount = find_mount(id);</td></tr>
776<tr><td class="num" id="LN697">697</td><td class="line"> <span class='keyword'>if</span> (mount == <span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
777<tr><td class="num" id="LN698">698</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>B_BAD_VALUE<span class='expansion'>((-2147483647 - 1) + 5)</span></span>;</td></tr>
778<tr><td class="num" id="LN699">699</td><td class="line"> </td></tr>
779<tr><td class="num" id="LN700">700</td><td class="line"> <span class='keyword'>struct</span> vnode* rootNode = mount-&gt;root_vnode;</td></tr>
780<tr><td class="num" id="LN701">701</td><td class="line"> <span class='keyword'>if</span> (rootNode == <span class='macro'>NULL<span class='expansion'>__null</span></span> || rootNode-&gt;IsBusy() || rootNode-&gt;ref_count == 0) {</td></tr>
781<tr><td class="num" id="LN702">702</td><td class="line"> <span class='comment'>// might have been called during a mount/unmount operation</span></td></tr>
782<tr><td class="num" id="LN703">703</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>B_BUSY<span class='expansion'>((-2147483647 - 1) + 14)</span></span>;</td></tr>
783<tr><td class="num" id="LN704">704</td><td class="line"> }</td></tr>
784<tr><td class="num" id="LN705">705</td><td class="line"> </td></tr>
785<tr><td class="num" id="LN706">706</td><td class="line"> inc_vnode_ref_count(mount-&gt;root_vnode);</td></tr>
786<tr><td class="num" id="LN707">707</td><td class="line"> *_mount = mount;</td></tr>
787<tr><td class="num" id="LN708">708</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>B_OK<span class='expansion'>((int)0)</span></span>;</td></tr>
788<tr><td class="num" id="LN709">709</td><td class="line">}</td></tr>
789<tr><td class="num" id="LN710">710</td><td class="line"> </td></tr>
790<tr><td class="num" id="LN711">711</td><td class="line"> </td></tr>
791<tr><td class="num" id="LN712">712</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span></td></tr>
792<tr><td class="num" id="LN713">713</td><td class="line">put_mount(<span class='keyword'>struct</span> fs_mount* mount)</td></tr>
793<tr><td class="num" id="LN714">714</td><td class="line">{</td></tr>
794<tr><td class="num" id="LN715">715</td><td class="line"> <span class='keyword'>if</span> (mount)</td></tr>
795<tr><td class="num" id="LN716">716</td><td class="line"> put_vnode(mount-&gt;root_vnode);</td></tr>
796<tr><td class="num" id="LN717">717</td><td class="line">}</td></tr>
797<tr><td class="num" id="LN718">718</td><td class="line"> </td></tr>
798<tr><td class="num" id="LN719">719</td><td class="line"> </td></tr>
799<tr><td class="num" id="LN720">720</td><td class="line"><span class='comment'>/*! Tries to open the specified file system module.</span></td></tr>
800<tr><td class="num" id="LN721">721</td><td class="line"> <span class='comment'>Accepts a file system name of the form "bfs" or "file_systems/bfs/v1".</span></td></tr>
801<tr><td class="num" id="LN722">722</td><td class="line"> <span class='comment'>Returns a pointer to file system module interface, or NULL if it</span></td></tr>
802<tr><td class="num" id="LN723">723</td><td class="line"> <span class='comment'>could not open the module.</span></td></tr>
803<tr><td class="num" id="LN724">724</td><td class="line"><span class='comment'>*/</span></td></tr>
804<tr><td class="num" id="LN725">725</td><td class="line"><span class='keyword'>static</span> file_system_module_info*</td></tr>
805<tr><td class="num" id="LN726">726</td><td class="line">get_file_system(<span class='keyword'>const</span> <span class='keyword'>char</span>* fsName)</td></tr>
806<tr><td class="num" id="LN727">727</td><td class="line">{</td></tr>
807<tr><td class="num" id="LN728">728</td><td class="line"> <span class='keyword'>char</span> name[<span class='macro'>B_FILE_NAME_LENGTH<span class='expansion'>(256)</span></span>];</td></tr>
808<tr><td class="num" id="LN729">729</td><td class="line"> <span class='keyword'>if</span> (strncmp(fsName, <span class='string_literal'>"file_systems/"</span>, strlen(<span class='string_literal'>"file_systems/"</span>))) {</td></tr>
809<tr><td class="num" id="LN730">730</td><td class="line"> <span class='comment'>// construct module name if we didn't get one</span></td></tr>
810<tr><td class="num" id="LN731">731</td><td class="line"> <span class='comment'>// (we currently support only one API)</span></td></tr>
811<tr><td class="num" id="LN732">732</td><td class="line"> snprintf(name, <span class='keyword'>sizeof</span>(name), <span class='string_literal'>"file_systems/%s/v1"</span>, fsName);</td></tr>
812<tr><td class="num" id="LN733">733</td><td class="line"> fsName = <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
813<tr><td class="num" id="LN734">734</td><td class="line"> }</td></tr>
814<tr><td class="num" id="LN735">735</td><td class="line"> </td></tr>
815<tr><td class="num" id="LN736">736</td><td class="line"> file_system_module_info* info;</td></tr>
816<tr><td class="num" id="LN737">737</td><td class="line"> <span class='keyword'>if</span> (get_module(fsName ? fsName : name, (module_info**)&amp;info) != <span class='macro'>B_OK<span class='expansion'>((int)0)</span></span>)</td></tr>
817<tr><td class="num" id="LN738">738</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
818<tr><td class="num" id="LN739">739</td><td class="line"> </td></tr>
819<tr><td class="num" id="LN740">740</td><td class="line"> <span class='keyword'>return</span> info;</td></tr>
820<tr><td class="num" id="LN741">741</td><td class="line">}</td></tr>
821<tr><td class="num" id="LN742">742</td><td class="line"> </td></tr>
822<tr><td class="num" id="LN743">743</td><td class="line"> </td></tr>
823<tr><td class="num" id="LN744">744</td><td class="line"><span class='comment'>/*! Accepts a file system name of the form "bfs" or "file_systems/bfs/v1"</span></td></tr>
824<tr><td class="num" id="LN745">745</td><td class="line"> <span class='comment'>and returns a compatible fs_info.fsh_name name ("bfs" in both cases).</span></td></tr>
825<tr><td class="num" id="LN746">746</td><td class="line"> <span class='comment'>The name is allocated for you, and you have to free() it when you're</span></td></tr>
826<tr><td class="num" id="LN747">747</td><td class="line"> <span class='comment'>done with it.</span></td></tr>
827<tr><td class="num" id="LN748">748</td><td class="line"> <span class='comment'>Returns NULL if the required memory is not available.</span></td></tr>
828<tr><td class="num" id="LN749">749</td><td class="line"><span class='comment'>*/</span></td></tr>
829<tr><td class="num" id="LN750">750</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>char</span>*</td></tr>
830<tr><td class="num" id="LN751">751</td><td class="line">get_file_system_name(<span class='keyword'>const</span> <span class='keyword'>char</span>* fsName)</td></tr>
831<tr><td class="num" id="LN752">752</td><td class="line">{</td></tr>
832<tr><td class="num" id="LN753">753</td><td class="line"> <span class='keyword'>const</span> size_t length = strlen(<span class='string_literal'>"file_systems/"</span>);</td></tr>
833<tr><td class="num" id="LN754">754</td><td class="line"> </td></tr>
834<tr><td class="num" id="LN755">755</td><td class="line"> <span class='keyword'>if</span> (strncmp(fsName, <span class='string_literal'>"file_systems/"</span>, length)) {</td></tr>
835<tr><td class="num" id="LN756">756</td><td class="line"> <span class='comment'>// the name already seems to be the module's file name</span></td></tr>
836<tr><td class="num" id="LN757">757</td><td class="line"> <span class='keyword'>return</span> strdup(fsName);</td></tr>
837<tr><td class="num" id="LN758">758</td><td class="line"> }</td></tr>
838<tr><td class="num" id="LN759">759</td><td class="line"> </td></tr>
839<tr><td class="num" id="LN760">760</td><td class="line"> fsName += length;</td></tr>
840<tr><td class="num" id="LN761">761</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>char</span>* end = strchr(fsName, '/');</td></tr>
841<tr><td class="num" id="LN762">762</td><td class="line"> <span class='keyword'>if</span> (end == <span class='macro'>NULL<span class='expansion'>__null</span></span>) {</td></tr>
842<tr><td class="num" id="LN763">763</td><td class="line"> <span class='comment'>// this doesn't seem to be a valid name, but well...</span></td></tr>
843<tr><td class="num" id="LN764">764</td><td class="line"> <span class='keyword'>return</span> strdup(fsName);</td></tr>
844<tr><td class="num" id="LN765">765</td><td class="line"> }</td></tr>
845<tr><td class="num" id="LN766">766</td><td class="line"> </td></tr>
846<tr><td class="num" id="LN767">767</td><td class="line"> <span class='comment'>// cut off the trailing /v1</span></td></tr>
847<tr><td class="num" id="LN768">768</td><td class="line"> </td></tr>
848<tr><td class="num" id="LN769">769</td><td class="line"> <span class='keyword'>char</span>* name = (<span class='keyword'>char</span>*)malloc(end + 1 - fsName);</td></tr>
849<tr><td class="num" id="LN770">770</td><td class="line"> <span class='keyword'>if</span> (name == <span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
850<tr><td class="num" id="LN771">771</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
851<tr><td class="num" id="LN772">772</td><td class="line"> </td></tr>
852<tr><td class="num" id="LN773">773</td><td class="line"> strlcpy(name, fsName, end + 1 - fsName);</td></tr>
853<tr><td class="num" id="LN774">774</td><td class="line"> <span class='keyword'>return</span> name;</td></tr>
854<tr><td class="num" id="LN775">775</td><td class="line">}</td></tr>
855<tr><td class="num" id="LN776">776</td><td class="line"> </td></tr>
856<tr><td class="num" id="LN777">777</td><td class="line"> </td></tr>
857<tr><td class="num" id="LN778">778</td><td class="line"><span class='comment'>/*! Accepts a list of file system names separated by a colon, one for each</span></td></tr>
858<tr><td class="num" id="LN779">779</td><td class="line"> <span class='comment'>layer and returns the file system name for the specified layer.</span></td></tr>
859<tr><td class="num" id="LN780">780</td><td class="line"> <span class='comment'>The name is allocated for you, and you have to free() it when you're</span></td></tr>
860<tr><td class="num" id="LN781">781</td><td class="line"> <span class='comment'>done with it.</span></td></tr>
861<tr><td class="num" id="LN782">782</td><td class="line"> <span class='comment'>Returns NULL if the required memory is not available or if there is no</span></td></tr>
862<tr><td class="num" id="LN783">783</td><td class="line"> <span class='comment'>name for the specified layer.</span></td></tr>
863<tr><td class="num" id="LN784">784</td><td class="line"><span class='comment'>*/</span></td></tr>
864<tr><td class="num" id="LN785">785</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>char</span>*</td></tr>
865<tr><td class="num" id="LN786">786</td><td class="line">get_file_system_name_for_layer(<span class='keyword'>const</span> <span class='keyword'>char</span>* fsNames, int32 layer)</td></tr>
866<tr><td class="num" id="LN787">787</td><td class="line">{</td></tr>
867<tr><td class="num" id="LN788">788</td><td class="line"> <span class='keyword'>while</span> (layer &gt;= 0) {</td></tr>
868<tr><td class="num"></td><td class="line"><div id="Path18" class="msg msgControl" style="margin-left:9ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">18</div></td><td><div class="PathNav"><a href="#Path17" title="Previous event (17)">&#x2190;</a></div></td></td><td>Loop condition is true. Entering loop body</td><td><div class="PathNav"><a href="#Path19" title="Next event (19)">&#x2192;</a></div></td></tr></table></div></td></tr>
869<tr><td class="num"></td><td class="line"><div id="Path21" class="msg msgControl" style="margin-left:9ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">21</div></td><td><div class="PathNav"><a href="#Path20" title="Previous event (20)">&#x2190;</a></div></td></td><td>Loop condition is true. Entering loop body</td><td><div class="PathNav"><a href="#Path22" title="Next event (22)">&#x2192;</a></div></td></tr></table></div></td></tr>
870<tr><td class="num" id="LN789">789</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>char</span>* end = strchr(fsNames, ':');</td></tr>
871<tr><td class="num" id="LN790">790</td><td class="line"> <span class='keyword'>if</span> (end == <span class='macro'>NULL<span class='expansion'>__null</span></span>) {</td></tr>
872<tr><td class="num"></td><td class="line"><div id="Path19" class="msg msgControl" style="margin-left:17ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">19</div></td><td><div class="PathNav"><a href="#Path18" title="Previous event (18)">&#x2190;</a></div></td></td><td>Taking false branch</td><td><div class="PathNav"><a href="#Path20" title="Next event (20)">&#x2192;</a></div></td></tr></table></div></td></tr>
873<tr><td class="num"></td><td class="line"><div id="Path22" class="msg msgControl" style="margin-left:17ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">22</div></td><td><div class="PathNav"><a href="#Path21" title="Previous event (21)">&#x2190;</a></div></td></td><td>Taking true branch</td><td><div class="PathNav"><a href="#Path23" title="Next event (23)">&#x2192;</a></div></td></tr></table></div></td></tr>
874<tr><td class="num" id="LN791">791</td><td class="line"> <span class='keyword'>if</span> (layer == 0)</td></tr>
875<tr><td class="num"></td><td class="line"><div id="Path23" class="msg msgControl" style="margin-left:25ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">23</div></td><td><div class="PathNav"><a href="#Path22" title="Previous event (22)">&#x2190;</a></div></td></td><td>Taking true branch</td><td><div class="PathNav"><a href="#Path24" title="Next event (24)">&#x2192;</a></div></td></tr></table></div></td></tr>
876<tr><td class="num" id="LN792">792</td><td class="line"> <span class='keyword'>return</span> <span class="mrange">strdup(fsNames)</span>;</td></tr>
877<tr><td class="num"></td><td class="line"><div id="Path24" class="msg msgEvent" style="margin-left:40ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexEvent">24</div></td><td><div class="PathNav"><a href="#Path23" title="Previous event (23)">&#x2190;</a></div></td></td><td>Memory is allocated</td><td><div class="PathNav"><a href="#Path25" title="Next event (25)">&#x2192;</a></div></td></tr></table></div></td></tr>
878<tr><td class="num" id="LN793">793</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
879<tr><td class="num" id="LN794">794</td><td class="line"> }</td></tr>
880<tr><td class="num" id="LN795">795</td><td class="line"> </td></tr>
881<tr><td class="num" id="LN796">796</td><td class="line"> <span class='keyword'>if</span> (layer == 0) {</td></tr>
882<tr><td class="num"></td><td class="line"><div id="Path20" class="msg msgControl" style="margin-left:17ex"><table class="msgT"><tr><td valign="top"><div class="PathIndex PathIndexControl">20</div></td><td><div class="PathNav"><a href="#Path19" title="Previous event (19)">&#x2190;</a></div></td></td><td>Taking false branch</td><td><div class="PathNav"><a href="#Path21" title="Next event (21)">&#x2192;</a></div></td></tr></table></div></td></tr>
883<tr><td class="num" id="LN797">797</td><td class="line"> size_t length = end - fsNames + 1;</td></tr>
884<tr><td class="num" id="LN798">798</td><td class="line"> <span class='keyword'>char</span>* result = (<span class='keyword'>char</span>*)malloc(length);</td></tr>
885<tr><td class="num" id="LN799">799</td><td class="line"> strlcpy(result, fsNames, length);</td></tr>
886<tr><td class="num" id="LN800">800</td><td class="line"> <span class='keyword'>return</span> result;</td></tr>
887<tr><td class="num" id="LN801">801</td><td class="line"> }</td></tr>
888<tr><td class="num" id="LN802">802</td><td class="line"> </td></tr>
889<tr><td class="num" id="LN803">803</td><td class="line"> fsNames = end + 1;</td></tr>
890<tr><td class="num" id="LN804">804</td><td class="line"> layer--;</td></tr>
891<tr><td class="num" id="LN805">805</td><td class="line"> }</td></tr>
892<tr><td class="num" id="LN806">806</td><td class="line"> </td></tr>
893<tr><td class="num" id="LN807">807</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>NULL<span class='expansion'>__null</span></span>;</td></tr>
894<tr><td class="num" id="LN808">808</td><td class="line">}</td></tr>
895<tr><td class="num" id="LN809">809</td><td class="line"> </td></tr>
896<tr><td class="num" id="LN810">810</td><td class="line"> </td></tr>
897<tr><td class="num" id="LN811">811</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>int</span></td></tr>
898<tr><td class="num" id="LN812">812</td><td class="line">vnode_compare(<span class='keyword'>void</span>* _vnode, <span class='keyword'>const</span> <span class='keyword'>void</span>* _key)</td></tr>
899<tr><td class="num" id="LN813">813</td><td class="line">{</td></tr>
900<tr><td class="num" id="LN814">814</td><td class="line"> <span class='keyword'>struct</span> vnode* vnode = (<span class='keyword'>struct</span> vnode*)_vnode;</td></tr>
901<tr><td class="num" id="LN815">815</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>struct</span> vnode_hash_key* key = (vnode_hash_key*)_key;</td></tr>
902<tr><td class="num" id="LN816">816</td><td class="line"> </td></tr>
903<tr><td class="num" id="LN817">817</td><td class="line"> <span class='keyword'>if</span> (vnode-&gt;device == key-&gt;device &amp;&amp; vnode-&gt;id == key-&gt;vnode)</td></tr>
904<tr><td class="num" id="LN818">818</td><td class="line"> <span class='keyword'>return</span> 0;</td></tr>
905<tr><td class="num" id="LN819">819</td><td class="line"> </td></tr>
906<tr><td class="num" id="LN820">820</td><td class="line"> <span class='keyword'>return</span> -1;</td></tr>
907<tr><td class="num" id="LN821">821</td><td class="line">}</td></tr>
908<tr><td class="num" id="LN822">822</td><td class="line"> </td></tr>
909<tr><td class="num" id="LN823">823</td><td class="line"> </td></tr>
910<tr><td class="num" id="LN824">824</td><td class="line"><span class='keyword'>static</span> uint32</td></tr>
911<tr><td class="num" id="LN825">825</td><td class="line">vnode_hash(<span class='keyword'>void</span>* _vnode, <span class='keyword'>const</span> <span class='keyword'>void</span>* _key, uint32 range)</td></tr>
912<tr><td class="num" id="LN826">826</td><td class="line">{</td></tr>
913<tr><td class="num" id="LN827">827</td><td class="line"> <span class='keyword'>struct</span> vnode* vnode = (<span class='keyword'>struct</span> vnode*)_vnode;</td></tr>
914<tr><td class="num" id="LN828">828</td><td class="line"> <span class='keyword'>const</span> <span class='keyword'>struct</span> vnode_hash_key* key = (vnode_hash_key*)_key;</td></tr>
915<tr><td class="num" id="LN829">829</td><td class="line"> </td></tr>
916<tr><td class="num" id="LN830">830</td><td class="line"><span class='directive'>#define VHASH(mountid, vnodeid) \</span></td></tr>
917<tr><td class="num" id="LN831">831</td><td class="line"> <span class='directive'>(((uint32)((vnodeid) &gt;&gt; 32) + (uint32)(vnodeid)) ^ (uint32)(mountid))</span></td></tr>
918<tr><td class="num" id="LN832">832</td><td class="line"> </td></tr>
919<tr><td class="num" id="LN833">833</td><td class="line"> <span class='keyword'>if</span> (vnode != <span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
920<tr><td class="num" id="LN834">834</td><td class="line"> <span class='keyword'>return</span> VHASH(vnode-&gt;device, vnode-&gt;id) % range;</td></tr>
921<tr><td class="num" id="LN835">835</td><td class="line"> </td></tr>
922<tr><td class="num" id="LN836">836</td><td class="line"> <span class='keyword'>return</span> VHASH(key-&gt;device, key-&gt;vnode) % range;</td></tr>
923<tr><td class="num" id="LN837">837</td><td class="line"> </td></tr>
924<tr><td class="num" id="LN838">838</td><td class="line"><span class='directive'>#undef VHASH</span></td></tr>
925<tr><td class="num" id="LN839">839</td><td class="line">}</td></tr>
926<tr><td class="num" id="LN840">840</td><td class="line"> </td></tr>
927<tr><td class="num" id="LN841">841</td><td class="line"> </td></tr>
928<tr><td class="num" id="LN842">842</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span></td></tr>
929<tr><td class="num" id="LN843">843</td><td class="line">add_vnode_to_mount_list(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>struct</span> fs_mount* mount)</td></tr>
930<tr><td class="num" id="LN844">844</td><td class="line">{</td></tr>
931<tr><td class="num" id="LN845">845</td><td class="line"> RecursiveLocker _(mount-&gt;rlock);</td></tr>
932<tr><td class="num" id="LN846">846</td><td class="line"> mount-&gt;vnodes.Add(vnode);</td></tr>
933<tr><td class="num" id="LN847">847</td><td class="line">}</td></tr>
934<tr><td class="num" id="LN848">848</td><td class="line"> </td></tr>
935<tr><td class="num" id="LN849">849</td><td class="line"> </td></tr>
936<tr><td class="num" id="LN850">850</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span></td></tr>
937<tr><td class="num" id="LN851">851</td><td class="line">remove_vnode_from_mount_list(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>struct</span> fs_mount* mount)</td></tr>
938<tr><td class="num" id="LN852">852</td><td class="line">{</td></tr>
939<tr><td class="num" id="LN853">853</td><td class="line"> RecursiveLocker _(mount-&gt;rlock);</td></tr>
940<tr><td class="num" id="LN854">854</td><td class="line"> mount-&gt;vnodes.Remove(vnode);</td></tr>
941<tr><td class="num" id="LN855">855</td><td class="line">}</td></tr>
942<tr><td class="num" id="LN856">856</td><td class="line"> </td></tr>
943<tr><td class="num" id="LN857">857</td><td class="line"> </td></tr>
944<tr><td class="num" id="LN858">858</td><td class="line"><span class='comment'>/*! \brief Looks up a vnode by mount and node ID in the sVnodeTable.</span></td></tr>
945<tr><td class="num" id="LN859">859</td><td class="line"> </td></tr>
946<tr><td class="num" id="LN860">860</td><td class="line"> <span class='comment'>The caller must hold the sVnodeLock (read lock at least).</span></td></tr>
947<tr><td class="num" id="LN861">861</td><td class="line"> </td></tr>
948<tr><td class="num" id="LN862">862</td><td class="line"> <span class='comment'>\param mountID the mount ID.</span></td></tr>
949<tr><td class="num" id="LN863">863</td><td class="line"> <span class='comment'>\param vnodeID the node ID.</span></td></tr>
950<tr><td class="num" id="LN864">864</td><td class="line"> </td></tr>
951<tr><td class="num" id="LN865">865</td><td class="line"> <span class='comment'>\return The vnode structure, if it was found in the hash table, \c NULL</span></td></tr>
952<tr><td class="num" id="LN866">866</td><td class="line"> <span class='comment'>otherwise.</span></td></tr>
953<tr><td class="num" id="LN867">867</td><td class="line"><span class='comment'>*/</span></td></tr>
954<tr><td class="num" id="LN868">868</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>struct</span> vnode*</td></tr>
955<tr><td class="num" id="LN869">869</td><td class="line">lookup_vnode(dev_t mountID, ino_t vnodeID)</td></tr>
956<tr><td class="num" id="LN870">870</td><td class="line">{</td></tr>
957<tr><td class="num" id="LN871">871</td><td class="line"> <span class='keyword'>struct</span> vnode_hash_key key;</td></tr>
958<tr><td class="num" id="LN872">872</td><td class="line"> </td></tr>
959<tr><td class="num" id="LN873">873</td><td class="line"> key.device = mountID;</td></tr>
960<tr><td class="num" id="LN874">874</td><td class="line"> key.vnode = vnodeID;</td></tr>
961<tr><td class="num" id="LN875">875</td><td class="line"> </td></tr>
962<tr><td class="num" id="LN876">876</td><td class="line"> <span class='keyword'>return</span> (vnode*)hash_lookup(sVnodeTable, &amp;key);</td></tr>
963<tr><td class="num" id="LN877">877</td><td class="line">}</td></tr>
964<tr><td class="num" id="LN878">878</td><td class="line"> </td></tr>
965<tr><td class="num" id="LN879">879</td><td class="line"> </td></tr>
966<tr><td class="num" id="LN880">880</td><td class="line"><span class='comment'>/*! Creates a new vnode with the given mount and node ID.</span></td></tr>
967<tr><td class="num" id="LN881">881</td><td class="line"> <span class='comment'>If the node already exists, it is returned instead and no new node is</span></td></tr>
968<tr><td class="num" id="LN882">882</td><td class="line"> <span class='comment'>created. In either case -- but not, if an error occurs -- the function write</span></td></tr>
969<tr><td class="num" id="LN883">883</td><td class="line"> <span class='comment'>locks \c sVnodeLock and keeps it locked for the caller when returning. On</span></td></tr>
970<tr><td class="num" id="LN884">884</td><td class="line"> <span class='comment'>error the lock is not not held on return.</span></td></tr>
971<tr><td class="num" id="LN885">885</td><td class="line"> </td></tr>
972<tr><td class="num" id="LN886">886</td><td class="line"> <span class='comment'>\param mountID The mount ID.</span></td></tr>
973<tr><td class="num" id="LN887">887</td><td class="line"> <span class='comment'>\param vnodeID The vnode ID.</span></td></tr>
974<tr><td class="num" id="LN888">888</td><td class="line"> <span class='comment'>\param _vnode Will be set to the new vnode on success.</span></td></tr>
975<tr><td class="num" id="LN889">889</td><td class="line"> <span class='comment'>\param _nodeCreated Will be set to \c true when the returned vnode has</span></td></tr>
976<tr><td class="num" id="LN890">890</td><td class="line"> <span class='comment'>been newly created, \c false when it already existed. Will not be</span></td></tr>
977<tr><td class="num" id="LN891">891</td><td class="line"> <span class='comment'>changed on error.</span></td></tr>
978<tr><td class="num" id="LN892">892</td><td class="line"> <span class='comment'>\return \c B_OK, when the vnode was successfully created and inserted or</span></td></tr>
979<tr><td class="num" id="LN893">893</td><td class="line"> <span class='comment'>a node with the given ID was found, \c B_NO_MEMORY or</span></td></tr>
980<tr><td class="num" id="LN894">894</td><td class="line"> <span class='comment'>\c B_ENTRY_NOT_FOUND on error.</span></td></tr>
981<tr><td class="num" id="LN895">895</td><td class="line"><span class='comment'>*/</span></td></tr>
982<tr><td class="num" id="LN896">896</td><td class="line"><span class='keyword'>static</span> status_t</td></tr>
983<tr><td class="num" id="LN897">897</td><td class="line">create_new_vnode_and_lock(dev_t mountID, ino_t vnodeID, <span class='keyword'>struct</span> vnode*&amp; _vnode,</td></tr>
984<tr><td class="num" id="LN898">898</td><td class="line"> <span class='keyword'>bool</span>&amp; _nodeCreated)</td></tr>
985<tr><td class="num" id="LN899">899</td><td class="line">{</td></tr>
986<tr><td class="num" id="LN900">900</td><td class="line"> <span class='macro'>FUNCTION((<span class='string_literal'>"create_new_vnode_and_lock()\n"</span>))<span class='expansion'>;</span></span>;</td></tr>
987<tr><td class="num" id="LN901">901</td><td class="line"> </td></tr>
988<tr><td class="num" id="LN902">902</td><td class="line"> <span class='keyword'>struct</span> vnode* vnode = (<span class='keyword'>struct</span> vnode*)malloc(<span class='keyword'>sizeof</span>(<span class='keyword'>struct</span> vnode));</td></tr>
989<tr><td class="num" id="LN903">903</td><td class="line"> <span class='keyword'>if</span> (vnode == <span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
990<tr><td class="num" id="LN904">904</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>B_NO_MEMORY<span class='expansion'>((-2147483647 - 1) + 0)</span></span>;</td></tr>
991<tr><td class="num" id="LN905">905</td><td class="line"> </td></tr>
992<tr><td class="num" id="LN906">906</td><td class="line"> <span class='comment'>// initialize basic values</span></td></tr>
993<tr><td class="num" id="LN907">907</td><td class="line"> memset(vnode, 0, <span class='keyword'>sizeof</span>(<span class='keyword'>struct</span> vnode));</td></tr>
994<tr><td class="num" id="LN908">908</td><td class="line"> vnode-&gt;device = mountID;</td></tr>
995<tr><td class="num" id="LN909">909</td><td class="line"> vnode-&gt;id = vnodeID;</td></tr>
996<tr><td class="num" id="LN910">910</td><td class="line"> vnode-&gt;ref_count = 1;</td></tr>
997<tr><td class="num" id="LN911">911</td><td class="line"> vnode-&gt;SetBusy(<span class='keyword'>true</span>);</td></tr>
998<tr><td class="num" id="LN912">912</td><td class="line"> </td></tr>
999<tr><td class="num" id="LN913">913</td><td class="line"> <span class='comment'>// look up the the node -- it might have been added by someone else in the</span></td></tr>
1000<tr><td class="num" id="LN914">914</td><td class="line"> <span class='comment'>// meantime</span></td></tr>
1001<tr><td class="num" id="LN915">915</td><td class="line"> rw_lock_write_lock(&amp;sVnodeLock);</td></tr>
1002<tr><td class="num" id="LN916">916</td><td class="line"> <span class='keyword'>struct</span> vnode* existingVnode = lookup_vnode(mountID, vnodeID);</td></tr>
1003<tr><td class="num" id="LN917">917</td><td class="line"> <span class='keyword'>if</span> (existingVnode != <span class='macro'>NULL<span class='expansion'>__null</span></span>) {</td></tr>
1004<tr><td class="num" id="LN918">918</td><td class="line"> free(vnode);</td></tr>
1005<tr><td class="num" id="LN919">919</td><td class="line"> _vnode = existingVnode;</td></tr>
1006<tr><td class="num" id="LN920">920</td><td class="line"> _nodeCreated = <span class='keyword'>false</span>;</td></tr>
1007<tr><td class="num" id="LN921">921</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>B_OK<span class='expansion'>((int)0)</span></span>;</td></tr>
1008<tr><td class="num" id="LN922">922</td><td class="line"> }</td></tr>
1009<tr><td class="num" id="LN923">923</td><td class="line"> </td></tr>
1010<tr><td class="num" id="LN924">924</td><td class="line"> <span class='comment'>// get the mount structure</span></td></tr>
1011<tr><td class="num" id="LN925">925</td><td class="line"> mutex_lock(&amp;sMountMutex);</td></tr>
1012<tr><td class="num" id="LN926">926</td><td class="line"> vnode-&gt;mount = find_mount(mountID);</td></tr>
1013<tr><td class="num" id="LN927">927</td><td class="line"> <span class='keyword'>if</span> (!vnode-&gt;mount || vnode-&gt;mount-&gt;unmounting) {</td></tr>
1014<tr><td class="num" id="LN928">928</td><td class="line"> mutex_unlock(&amp;sMountMutex);</td></tr>
1015<tr><td class="num" id="LN929">929</td><td class="line"> rw_lock_write_unlock(&amp;sVnodeLock);</td></tr>
1016<tr><td class="num" id="LN930">930</td><td class="line"> free(vnode);</td></tr>
1017<tr><td class="num" id="LN931">931</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>B_ENTRY_NOT_FOUND<span class='expansion'>(((-2147483647 - 1) + 0x6000) + 3)</span></span>;</td></tr>
1018<tr><td class="num" id="LN932">932</td><td class="line"> }</td></tr>
1019<tr><td class="num" id="LN933">933</td><td class="line"> </td></tr>
1020<tr><td class="num" id="LN934">934</td><td class="line"> <span class='comment'>// add the vnode to the mount's node list and the hash table</span></td></tr>
1021<tr><td class="num" id="LN935">935</td><td class="line"> hash_insert(sVnodeTable, vnode);</td></tr>
1022<tr><td class="num" id="LN936">936</td><td class="line"> add_vnode_to_mount_list(vnode, vnode-&gt;mount);</td></tr>
1023<tr><td class="num" id="LN937">937</td><td class="line"> </td></tr>
1024<tr><td class="num" id="LN938">938</td><td class="line"> mutex_unlock(&amp;sMountMutex);</td></tr>
1025<tr><td class="num" id="LN939">939</td><td class="line"> </td></tr>
1026<tr><td class="num" id="LN940">940</td><td class="line"> _vnode = vnode;</td></tr>
1027<tr><td class="num" id="LN941">941</td><td class="line"> _nodeCreated = <span class='keyword'>true</span>;</td></tr>
1028<tr><td class="num" id="LN942">942</td><td class="line"> </td></tr>
1029<tr><td class="num" id="LN943">943</td><td class="line"> <span class='comment'>// keep the vnode lock locked</span></td></tr>
1030<tr><td class="num" id="LN944">944</td><td class="line"> <span class='keyword'>return</span> <span class='macro'>B_OK<span class='expansion'>((int)0)</span></span>;</td></tr>
1031<tr><td class="num" id="LN945">945</td><td class="line">}</td></tr>
1032<tr><td class="num" id="LN946">946</td><td class="line"> </td></tr>
1033<tr><td class="num" id="LN947">947</td><td class="line"> </td></tr>
1034<tr><td class="num" id="LN948">948</td><td class="line"><span class='comment'>/*! Frees the vnode and all resources it has acquired, and removes</span></td></tr>
1035<tr><td class="num" id="LN949">949</td><td class="line"> <span class='comment'>it from the vnode hash as well as from its mount structure.</span></td></tr>
1036<tr><td class="num" id="LN950">950</td><td class="line"> <span class='comment'>Will also make sure that any cache modifications are written back.</span></td></tr>
1037<tr><td class="num" id="LN951">951</td><td class="line"><span class='comment'>*/</span></td></tr>
1038<tr><td class="num" id="LN952">952</td><td class="line"><span class='keyword'>static</span> <span class='keyword'>void</span></td></tr>
1039<tr><td class="num" id="LN953">953</td><td class="line">free_vnode(<span class='keyword'>struct</span> vnode* vnode, <span class='keyword'>bool</span> reenter)</td></tr>
1040<tr><td class="num" id="LN954">954</td><td class="line">{</td></tr>
1041<tr><td class="num" id="LN955">955</td><td class="line"> <span class='macro'>ASSERT_PRINT(vnode-&gt;ref_count == 0 &amp;&amp; vnode-&gt;IsBusy(), <span class='string_literal'>"vnode: %p\n"</span>,<span class='expansion'>do { if (!(vnode-&gt;ref_count == 0 &amp;&amp; vnode-&gt;IsBusy<br>())) { panic("ASSERT FAILED (%s:%d): %s; " "vnode: %p\n", "/home/haiku/haiku/haiku/src/system/kernel/fs/vfs.cpp"<br>, 956, "vnode-&gt;ref_count == 0 &amp;&amp; vnode-&gt;IsBusy()"<br>, vnode); } } while (0)</span></span></td></tr>
1042<tr><td class="num" id="LN956">956</td><td class="line"> <span class='macro'>vnode)<span class='expansion'>do { if (!(vnode-&gt;ref_count == 0 &amp;&amp; vnode-&gt;IsBusy<br>())) { panic("ASSERT FAILED (%s:%d): %s; " "vnode: %p\n", "/home/haiku/haiku/haiku/src/system/kernel/fs/vfs.cpp"<br>, 956, "vnode-&gt;ref_count == 0 &amp;&amp; vnode-&gt;IsBusy()"<br>, vnode); } } while (0)</span></span>;</td></tr>
1043<tr><td class="num" id="LN957">957</td><td class="line"> </td></tr>
1044<tr><td class="num" id="LN958">958</td><td class="line"> <span class='comment'>// write back any changes in this vnode's cache -- but only</span></td></tr>
1045<tr><td class="num" id="LN959">959</td><td class="line"> <span class='comment'>// if the vnode won't be deleted, in which case the changes</span></td></tr>
1046<tr><td class="num" id="LN960">960</td><td class="line"> <span class='comment'>// will be discarded</span></td></tr>
1047<tr><td class="num" id="LN961">961</td><td class="line"> </td></tr>
1048<tr><td class="num" id="LN962">962</td><td class="line"> <span class='keyword'>if</span> (!vnode-&gt;IsRemoved() &amp;&amp; <span class='macro'>HAS_FS_CALL(vnode, fsync)<span class='expansion'>(vnode-&gt;ops-&gt;fsync != __null)</span></span>)</td></tr>
1049<tr><td class="num" id="LN963">963</td><td class="line"> <span class='macro'>FS_CALL_NO_PARAMS(vnode, fsync)<span class='expansion'>( (vnode-&gt;ops-&gt;fsync != __null) ? vnode-&gt;ops-&gt;fsync<br>(vnode-&gt;mount-&gt;volume, vnode) : (panic("FS_CALL_NO_PARAMS op "<br> "fsync" " is NULL"), 0))</span></span>;</td></tr>
1050<tr><td class="num" id="LN964">964</td><td class="line"> </td></tr>
1051<tr><td class="num" id="LN965">965</td><td class="line"> <span class='comment'>// Note: If this vnode has a cache attached, there will still be two</span></td></tr>
1052<tr><td class="num" id="LN966">966</td><td class="line"> <span class='comment'>// references to that cache at this point. The last one belongs to the vnode</span></td></tr>
1053<tr><td class="num" id="LN967">967</td><td class="line"> <span class='comment'>// itself (cf. vfs_get_vnode_cache()) and one belongs to the node's file</span></td></tr>
1054<tr><td class="num" id="LN968">968</td><td class="line"> <span class='comment'>// cache. Each but the last reference to a cache also includes a reference</span></td></tr>
1055<tr><td class="num" id="LN969">969</td><td class="line"> <span class='comment'>// to the vnode. The file cache, however, released its reference (cf.</span></td></tr>
1056<tr><td class="num" id="LN970">970</td><td class="line"> <span class='comment'>// file_cache_create()), so that this vnode's ref count has the chance to</span></td></tr>
1057<tr><td class="num" id="LN971">971</td><td class="line"> <span class='comment'>// ever drop to 0. Deleting the file cache now, will cause the next to last</span></td></tr>
1058<tr><td class="num" id="LN972">972</td><td class="line"> <span class='comment'>// cache reference to be released, which will also release a (no longer</span></td></tr>
1059<tr><td class="num" id="LN973">973</td><td class="line"> <span class='comment'>// existing) vnode reference. To avoid problems, we set the vnode's ref</span></td></tr>
1060<tr><td class="num" id="LN974">974</td><td class="line"> <span class='comment'>// count, so that it will neither become negative nor 0.</span></td></tr>
1061<tr><td class="num" id="LN975">975</td><td class="line"> vnode-&gt;ref_count = 2;</td></tr>
1062<tr><td class="num" id="LN976">976</td><td class="line"> </td></tr>
1063<tr><td class="num" id="LN977">977</td><td class="line"> <span class='keyword'>if</span> (!vnode-&gt;IsUnpublished()) {</td></tr>
1064<tr><td class="num" id="LN978">978</td><td class="line"> <span class='keyword'>if</span> (vnode-&gt;IsRemoved())</td></tr>
1065<tr><td class="num" id="LN979">979</td><td class="line"> <span class='macro'>FS_CALL(vnode, remove_vnode, reenter)<span class='expansion'>( (vnode-&gt;ops-&gt;remove_vnode != __null) ? vnode-&gt;ops-&gt;<br>remove_vnode(vnode-&gt;mount-&gt;volume, vnode, reenter) : (panic<br>("FS_CALL op " "remove_vnode" " is NULL"), 0))</span></span>;</td></tr>
1066<tr><td class="num" id="LN980">980</td><td class="line"> <span class='keyword'>else</span></td></tr>
1067<tr><td class="num" id="LN981">981</td><td class="line"> <span class='macro'>FS_CALL(vnode, put_vnode, reenter)<span class='expansion'>( (vnode-&gt;ops-&gt;put_vnode != __null) ? vnode-&gt;ops-&gt;<br>put_vnode(vnode-&gt;mount-&gt;volume, vnode, reenter) : (panic<br>("FS_CALL op " "put_vnode" " is NULL"), 0))</span></span>;</td></tr>
1068<tr><td class="num" id="LN982">982</td><td class="line"> }</td></tr>
1069<tr><td class="num" id="LN983">983</td><td class="line"> </td></tr>
1070<tr><td class="num" id="LN984">984</td><td class="line"> <span class='comment'>// If the vnode has a VMCache attached, make sure that it won't try to get</span></td></tr>
1071<tr><td class="num" id="LN985">985</td><td class="line"> <span class='comment'>// another reference via VMVnodeCache::AcquireUnreferencedStoreRef(). As</span></td></tr>
1072<tr><td class="num" id="LN986">986</td><td class="line"> <span class='comment'>// long as the vnode is busy and in the hash, that won't happen, but as</span></td></tr>
1073<tr><td class="num" id="LN987">987</td><td class="line"> <span class='comment'>// soon as we've removed it from the hash, it could reload the vnode -- with</span></td></tr>
1074<tr><td class="num" id="LN988">988</td><td class="line"> <span class='comment'>// a new cache attached!</span></td></tr>
1075<tr><td class="num" id="LN989">989</td><td class="line"> <span class='keyword'>if</span> (vnode-&gt;cache != <span class='macro'>NULL<span class='expansion'>__null</span></span>)</td></tr>
1076<tr><td class="num" id="LN990">990</td><td class="line"> ((VMVnodeCache*)vnode-&gt;cache)-&gt;VnodeDeleted();</td></tr>
1077<tr><td class="num" id="LN991">991</td><td class="line"> </td></tr>
1078<tr><td class="num" id="LN992">992</td><td class="line"> <span class='comment'>// The file system has removed the resources of the vnode now, so we can</span></td></tr>
1079<tr><td class="num" id="LN993">993</td><td class="line"> <span class='comment'>// make it available again (by removing the busy vnode from the hash).</span></td></tr>
1080<tr><td class="num" id="LN994">994</td><td class="line"> rw_lock_write_lock(&amp;sVnodeLock);</td></tr>
1081<tr><td class="num" id="LN995">995</td><td class="line"> hash_remove(sVnodeTable, vnode);</td></tr>
1082<tr><td class="num" id="LN996">996</td><td class="line"> rw_lock_write_unlock(&amp;sVnodeLock);</td></tr>
1083<tr><td class="num" id="LN997">997</td><td class="line"> </td></tr>
1084<tr><td class="num" id="LN998">998</td><td class="line"> <span class='comment'>// if we have a VMCache attached, remove it</span></td></tr>
1085<tr><td class="num" id="LN999">999</td><td class="line"> <span class='keyword'>if</span> (vnode-&gt;cache)</td></tr>
1086<tr><td class="num" id="LN1000">1000</td><td class="line"> vnode-&gt;cache-&gt;ReleaseRef();</td></tr>
1087<tr><td class="num" id="LN1001">1001</