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| <td width="10%" class="headerValue"><a href="../index.html">top level</a> - <a href="index.html">core</a> - nvram-format.c<span style="font-size: 80%;"> (source / <a href="nvram-format.c.func-c.html">functions</a>)</span></td> |
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| <td width="5%" class="headerCovTableHead">Coverage</td> |
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| <td class="headerItem">Test:</td> |
| <td class="headerValue">skiboot.info</td> |
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| <td class="headerItem">Lines:</td> |
| <td class="headerCovTableEntryMed">76.9 %</td> |
| <td class="headerCovTableEntry">147</td> |
| <td class="headerCovTableEntry">113</td> |
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| <td class="headerItem">Test Date:</td> |
| <td class="headerValue">2025-06-27 16:54:26</td> |
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| <td class="headerItem">Functions:</td> |
| <td class="headerCovTableEntryLo">54.5 %</td> |
| <td class="headerCovTableEntry">11</td> |
| <td class="headerCovTableEntry">6</td> |
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| <pre class="sourceHeading"> Branch data Line data Source code</pre> |
| <pre class="source"> |
| <span id="L1"><span class="lineNum"> 1</span> : : // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later</span> |
| <span id="L2"><span class="lineNum"> 2</span> : : /*</span> |
| <span id="L3"><span class="lineNum"> 3</span> : : * NVRAM Format as specified in PAPR</span> |
| <span id="L4"><span class="lineNum"> 4</span> : : *</span> |
| <span id="L5"><span class="lineNum"> 5</span> : : * Copyright 2013-2019 IBM Corp.</span> |
| <span id="L6"><span class="lineNum"> 6</span> : : */</span> |
| <span id="L7"><span class="lineNum"> 7</span> : : </span> |
| <span id="L8"><span class="lineNum"> 8</span> : : #include <skiboot.h></span> |
| <span id="L9"><span class="lineNum"> 9</span> : : #include <nvram.h></span> |
| <span id="L10"><span class="lineNum"> 10</span> : : </span> |
| <span id="L11"><span class="lineNum"> 11</span> : : struct chrp_nvram_hdr {</span> |
| <span id="L12"><span class="lineNum"> 12</span> : : uint8_t sig;</span> |
| <span id="L13"><span class="lineNum"> 13</span> : : uint8_t cksum;</span> |
| <span id="L14"><span class="lineNum"> 14</span> : : be16 len;</span> |
| <span id="L15"><span class="lineNum"> 15</span> : : char name[12];</span> |
| <span id="L16"><span class="lineNum"> 16</span> : : };</span> |
| <span id="L17"><span class="lineNum"> 17</span> : : </span> |
| <span id="L18"><span class="lineNum"> 18</span> : : static struct chrp_nvram_hdr *skiboot_part_hdr;</span> |
| <span id="L19"><span class="lineNum"> 19</span> : : </span> |
| <span id="L20"><span class="lineNum"> 20</span> : : #define NVRAM_SIG_FW_PRIV 0x51</span> |
| <span id="L21"><span class="lineNum"> 21</span> : : #define NVRAM_SIG_SYSTEM 0x70</span> |
| <span id="L22"><span class="lineNum"> 22</span> : : #define NVRAM_SIG_FREE 0x7f</span> |
| <span id="L23"><span class="lineNum"> 23</span> : : </span> |
| <span id="L24"><span class="lineNum"> 24</span> : : #define NVRAM_NAME_COMMON "common"</span> |
| <span id="L25"><span class="lineNum"> 25</span> : : #define NVRAM_NAME_FW_PRIV "ibm,skiboot"</span> |
| <span id="L26"><span class="lineNum"> 26</span> : : #define NVRAM_NAME_FREE "wwwwwwwwwwww"</span> |
| <span id="L27"><span class="lineNum"> 27</span> : : </span> |
| <span id="L28"><span class="lineNum"> 28</span> : : /* 64k should be enough, famous last words... */</span> |
| <span id="L29"><span class="lineNum"> 29</span> : : #define NVRAM_SIZE_COMMON 0x10000</span> |
| <span id="L30"><span class="lineNum"> 30</span> : : </span> |
| <span id="L31"><span class="lineNum"> 31</span> : : /* 4k should be enough, famous last words... */</span> |
| <span id="L32"><span class="lineNum"> 32</span> : : #define NVRAM_SIZE_FW_PRIV 0x1000</span> |
| <span id="L33"><span class="lineNum"> 33</span> : : </span> |
| <span id="L34"><span class="lineNum"> 34</span> :<span class="tlaGNC tlaBgGNC"> 82 : static uint8_t chrp_nv_cksum(struct chrp_nvram_hdr *hdr)</span></span> |
| <span id="L35"><span class="lineNum"> 35</span> : : {</span> |
| <span id="L36"><span class="lineNum"> 36</span> :<span class="tlaGNC"> 82 : struct chrp_nvram_hdr h_copy = *hdr;</span></span> |
| <span id="L37"><span class="lineNum"> 37</span> : : uint8_t b_data, i_sum, c_sum;</span> |
| <span id="L38"><span class="lineNum"> 38</span> :<span class="tlaGNC"> 82 : uint8_t *p = (uint8_t *)&h_copy;</span></span> |
| <span id="L39"><span class="lineNum"> 39</span> :<span class="tlaGNC"> 82 : unsigned int nbytes = sizeof(h_copy);</span></span> |
| <span id="L40"><span class="lineNum"> 40</span> : : </span> |
| <span id="L41"><span class="lineNum"> 41</span> :<span class="tlaGNC"> 82 : h_copy.cksum = 0;</span></span> |
| <span id="L42"><span class="lineNum"> 42</span> :<span class="tlaGNC"> 1394 : for (c_sum = 0; nbytes; nbytes--) {</span></span> |
| <span id="L43"><span class="lineNum"> 43</span> :<span class="tlaGNC"> 1312 : b_data = *(p++);</span></span> |
| <span id="L44"><span class="lineNum"> 44</span> :<span class="tlaGNC"> 1312 : i_sum = c_sum + b_data;</span></span> |
| <span id="L45"><span class="lineNum"> 45</span> :<span class="tlaGNC"> 1312 : if (i_sum < c_sum)</span></span> |
| <span id="L46"><span class="lineNum"> 46</span> :<span class="tlaGNC"> 345 : i_sum++;</span></span> |
| <span id="L47"><span class="lineNum"> 47</span> :<span class="tlaGNC"> 1312 : c_sum = i_sum;</span></span> |
| <span id="L48"><span class="lineNum"> 48</span> : : }</span> |
| <span id="L49"><span class="lineNum"> 49</span> :<span class="tlaGNC"> 82 : return c_sum;</span></span> |
| <span id="L50"><span class="lineNum"> 50</span> : : }</span> |
| <span id="L51"><span class="lineNum"> 51</span> : : </span> |
| <span id="L52"><span class="lineNum"> 52</span> :<span class="tlaGNC"> 17 : int nvram_format(void *nvram_image, uint32_t nvram_size)</span></span> |
| <span id="L53"><span class="lineNum"> 53</span> : : {</span> |
| <span id="L54"><span class="lineNum"> 54</span> : : struct chrp_nvram_hdr *h;</span> |
| <span id="L55"><span class="lineNum"> 55</span> :<span class="tlaGNC"> 17 : unsigned int offset = 0;</span></span> |
| <span id="L56"><span class="lineNum"> 56</span> : : </span> |
| <span id="L57"><span class="lineNum"> 57</span> :<span class="tlaGNC"> 17 : prerror("NVRAM: Re-initializing (size: 0x%08x)\n", nvram_size);</span></span> |
| <span id="L58"><span class="lineNum"> 58</span> :<span class="tlaGNC"> 17 : memset(nvram_image, 0, nvram_size);</span></span> |
| <span id="L59"><span class="lineNum"> 59</span> : : </span> |
| <span id="L60"><span class="lineNum"> 60</span> : : /* Create private partition */</span> |
| <span id="L61"><span class="lineNum"> 61</span> :<span class="tlaGNC"> 17 : if (nvram_size - offset < NVRAM_SIZE_FW_PRIV)</span></span> |
| <span id="L62"><span class="lineNum"> 62</span> :<span class="tlaGNC"> 1 : return -1;</span></span> |
| <span id="L63"><span class="lineNum"> 63</span> :<span class="tlaGNC"> 16 : h = nvram_image + offset;</span></span> |
| <span id="L64"><span class="lineNum"> 64</span> :<span class="tlaGNC"> 16 : h->sig = NVRAM_SIG_FW_PRIV;</span></span> |
| <span id="L65"><span class="lineNum"> 65</span> :<span class="tlaGNC"> 16 : h->len = cpu_to_be16(NVRAM_SIZE_FW_PRIV >> 4);</span></span> |
| <span id="L66"><span class="lineNum"> 66</span> :<span class="tlaGNC"> 16 : strcpy(h->name, NVRAM_NAME_FW_PRIV);</span></span> |
| <span id="L67"><span class="lineNum"> 67</span> :<span class="tlaGNC"> 16 : h->cksum = chrp_nv_cksum(h);</span></span> |
| <span id="L68"><span class="lineNum"> 68</span> :<span class="tlaGNC"> 16 : prlog(PR_DEBUG, "NVRAM: Created '%s' partition at 0x%08x"</span></span> |
| <span id="L69"><span class="lineNum"> 69</span> : : " for size 0x%08x with cksum 0x%02x\n",</span> |
| <span id="L70"><span class="lineNum"> 70</span> : : NVRAM_NAME_FW_PRIV, offset,</span> |
| <span id="L71"><span class="lineNum"> 71</span> : : be16_to_cpu(h->len), h->cksum);</span> |
| <span id="L72"><span class="lineNum"> 72</span> :<span class="tlaGNC"> 16 : offset += NVRAM_SIZE_FW_PRIV;</span></span> |
| <span id="L73"><span class="lineNum"> 73</span> : : </span> |
| <span id="L74"><span class="lineNum"> 74</span> : : /* Create common partition */</span> |
| <span id="L75"><span class="lineNum"> 75</span> :<span class="tlaGNC"> 16 : if (nvram_size - offset < NVRAM_SIZE_COMMON)</span></span> |
| <span id="L76"><span class="lineNum"> 76</span> :<span class="tlaGNC"> 2 : return -1;</span></span> |
| <span id="L77"><span class="lineNum"> 77</span> :<span class="tlaGNC"> 14 : h = nvram_image + offset;</span></span> |
| <span id="L78"><span class="lineNum"> 78</span> :<span class="tlaGNC"> 14 : h->sig = NVRAM_SIG_SYSTEM;</span></span> |
| <span id="L79"><span class="lineNum"> 79</span> :<span class="tlaGNC"> 14 : h->len = cpu_to_be16(NVRAM_SIZE_COMMON >> 4);</span></span> |
| <span id="L80"><span class="lineNum"> 80</span> :<span class="tlaGNC"> 14 : strcpy(h->name, NVRAM_NAME_COMMON);</span></span> |
| <span id="L81"><span class="lineNum"> 81</span> :<span class="tlaGNC"> 14 : h->cksum = chrp_nv_cksum(h);</span></span> |
| <span id="L82"><span class="lineNum"> 82</span> :<span class="tlaGNC"> 14 : prlog(PR_DEBUG, "NVRAM: Created '%s' partition at 0x%08x"</span></span> |
| <span id="L83"><span class="lineNum"> 83</span> : : " for size 0x%08x with cksum 0x%02x\n",</span> |
| <span id="L84"><span class="lineNum"> 84</span> : : NVRAM_NAME_COMMON, offset,</span> |
| <span id="L85"><span class="lineNum"> 85</span> : : be16_to_cpu(h->len), h->cksum);</span> |
| <span id="L86"><span class="lineNum"> 86</span> :<span class="tlaGNC"> 14 : offset += NVRAM_SIZE_COMMON;</span></span> |
| <span id="L87"><span class="lineNum"> 87</span> : : </span> |
| <span id="L88"><span class="lineNum"> 88</span> : : /* Create free space partition */</span> |
| <span id="L89"><span class="lineNum"> 89</span> :<span class="tlaGNC"> 14 : if (nvram_size - offset < sizeof(struct chrp_nvram_hdr))</span></span> |
| <span id="L90"><span class="lineNum"> 90</span> :<span class="tlaGNC"> 1 : return -1;</span></span> |
| <span id="L91"><span class="lineNum"> 91</span> :<span class="tlaGNC"> 13 : h = nvram_image + offset;</span></span> |
| <span id="L92"><span class="lineNum"> 92</span> :<span class="tlaGNC"> 13 : h->sig = NVRAM_SIG_FREE;</span></span> |
| <span id="L93"><span class="lineNum"> 93</span> :<span class="tlaGNC"> 13 : h->len = cpu_to_be16((nvram_size - offset) >> 4);</span></span> |
| <span id="L94"><span class="lineNum"> 94</span> : : /* We have the full 12 bytes here */</span> |
| <span id="L95"><span class="lineNum"> 95</span> :<span class="tlaGNC"> 13 : memcpy(h->name, NVRAM_NAME_FREE, 12);</span></span> |
| <span id="L96"><span class="lineNum"> 96</span> :<span class="tlaGNC"> 13 : h->cksum = chrp_nv_cksum(h);</span></span> |
| <span id="L97"><span class="lineNum"> 97</span> :<span class="tlaGNC"> 13 : prlog(PR_DEBUG, "NVRAM: Created '%s' partition at 0x%08x"</span></span> |
| <span id="L98"><span class="lineNum"> 98</span> : : " for size 0x%08x with cksum 0x%02x\n",</span> |
| <span id="L99"><span class="lineNum"> 99</span> : : NVRAM_NAME_FREE, offset, be16_to_cpu(h->len), h->cksum);</span> |
| <span id="L100"><span class="lineNum"> 100</span> :<span class="tlaGNC"> 13 : return 0;</span></span> |
| <span id="L101"><span class="lineNum"> 101</span> : : }</span> |
| <span id="L102"><span class="lineNum"> 102</span> : : </span> |
| <span id="L103"><span class="lineNum"> 103</span> : : /*</span> |
| <span id="L104"><span class="lineNum"> 104</span> : : * Check that the nvram partition layout is sane and that it</span> |
| <span id="L105"><span class="lineNum"> 105</span> : : * contains our required partitions. If not, we re-format the</span> |
| <span id="L106"><span class="lineNum"> 106</span> : : * lot of it</span> |
| <span id="L107"><span class="lineNum"> 107</span> : : */</span> |
| <span id="L108"><span class="lineNum"> 108</span> :<span class="tlaGNC"> 14 : int nvram_check(void *nvram_image, const uint32_t nvram_size)</span></span> |
| <span id="L109"><span class="lineNum"> 109</span> : : {</span> |
| <span id="L110"><span class="lineNum"> 110</span> :<span class="tlaGNC"> 14 : unsigned int offset = 0;</span></span> |
| <span id="L111"><span class="lineNum"> 111</span> :<span class="tlaGNC"> 14 : bool found_common = false;</span></span> |
| <span id="L112"><span class="lineNum"> 112</span> : : </span> |
| <span id="L113"><span class="lineNum"> 113</span> :<span class="tlaGNC"> 14 : skiboot_part_hdr = NULL;</span></span> |
| <span id="L114"><span class="lineNum"> 114</span> : : </span> |
| <span id="L115"><span class="lineNum"> 115</span> :<span class="tlaGNC"> 43 : while (offset + sizeof(struct chrp_nvram_hdr) < nvram_size) {</span></span> |
| <span id="L116"><span class="lineNum"> 116</span> :<span class="tlaGNC"> 33 : struct chrp_nvram_hdr *h = nvram_image + offset;</span></span> |
| <span id="L117"><span class="lineNum"> 117</span> : : </span> |
| <span id="L118"><span class="lineNum"> 118</span> :<span class="tlaGNC"> 33 : if (chrp_nv_cksum(h) != h->cksum) {</span></span> |
| <span id="L119"><span class="lineNum"> 119</span> :<span class="tlaGNC"> 2 : prerror("NVRAM: Partition at offset 0x%x"</span></span> |
| <span id="L120"><span class="lineNum"> 120</span> : : " has bad checksum: 0x%02x vs 0x%02x\n",</span> |
| <span id="L121"><span class="lineNum"> 121</span> : : offset, h->cksum, chrp_nv_cksum(h));</span> |
| <span id="L122"><span class="lineNum"> 122</span> :<span class="tlaGNC"> 2 : goto failed;</span></span> |
| <span id="L123"><span class="lineNum"> 123</span> : : }</span> |
| <span id="L124"><span class="lineNum"> 124</span> :<span class="tlaGNC"> 31 : if (be16_to_cpu(h->len) < 1) {</span></span> |
| <span id="L125"><span class="lineNum"> 125</span> :<span class="tlaGNC"> 1 : prerror("NVRAM: Partition at offset 0x%x"</span></span> |
| <span id="L126"><span class="lineNum"> 126</span> : : " has incorrect 0 length\n", offset);</span> |
| <span id="L127"><span class="lineNum"> 127</span> :<span class="tlaGNC"> 1 : goto failed;</span></span> |
| <span id="L128"><span class="lineNum"> 128</span> : : }</span> |
| <span id="L129"><span class="lineNum"> 129</span> : : </span> |
| <span id="L130"><span class="lineNum"> 130</span> :<span class="tlaGNC"> 30 : if (h->sig == NVRAM_SIG_SYSTEM &&</span></span> |
| <span id="L131"><span class="lineNum"> 131</span> :<span class="tlaGNC"> 10 : strcmp(h->name, NVRAM_NAME_COMMON) == 0)</span></span> |
| <span id="L132"><span class="lineNum"> 132</span> :<span class="tlaGNC"> 9 : found_common = true;</span></span> |
| <span id="L133"><span class="lineNum"> 133</span> : : </span> |
| <span id="L134"><span class="lineNum"> 134</span> :<span class="tlaGNC"> 30 : if (h->sig == NVRAM_SIG_FW_PRIV &&</span></span> |
| <span id="L135"><span class="lineNum"> 135</span> :<span class="tlaGNC"> 11 : strcmp(h->name, NVRAM_NAME_FW_PRIV) == 0)</span></span> |
| <span id="L136"><span class="lineNum"> 136</span> :<span class="tlaGNC"> 10 : skiboot_part_hdr = h;</span></span> |
| <span id="L137"><span class="lineNum"> 137</span> : : </span> |
| <span id="L138"><span class="lineNum"> 138</span> :<span class="tlaGNC"> 30 : offset += be16_to_cpu(h->len) << 4;</span></span> |
| <span id="L139"><span class="lineNum"> 139</span> :<span class="tlaGNC"> 30 : if (offset > nvram_size) {</span></span> |
| <span id="L140"><span class="lineNum"> 140</span> :<span class="tlaGNC"> 1 : prerror("NVRAM: Partition at offset 0x%x"</span></span> |
| <span id="L141"><span class="lineNum"> 141</span> : : " extends beyond end of nvram !\n", offset);</span> |
| <span id="L142"><span class="lineNum"> 142</span> :<span class="tlaGNC"> 1 : goto failed;</span></span> |
| <span id="L143"><span class="lineNum"> 143</span> : : }</span> |
| <span id="L144"><span class="lineNum"> 144</span> : : }</span> |
| <span id="L145"><span class="lineNum"> 145</span> :<span class="tlaGNC"> 10 : if (!found_common) {</span></span> |
| <span id="L146"><span class="lineNum"> 146</span> :<span class="tlaGNC"> 1 : prlog_once(PR_ERR, "NVRAM: Common partition not found !\n");</span></span> |
| <span id="L147"><span class="lineNum"> 147</span> :<span class="tlaGNC"> 1 : goto failed;</span></span> |
| <span id="L148"><span class="lineNum"> 148</span> : : }</span> |
| <span id="L149"><span class="lineNum"> 149</span> : : </span> |
| <span id="L150"><span class="lineNum"> 150</span> :<span class="tlaGNC"> 9 : if (!skiboot_part_hdr) {</span></span> |
| <span id="L151"><span class="lineNum"> 151</span> :<span class="tlaGNC"> 1 : prlog_once(PR_ERR, "NVRAM: Skiboot private partition not found !\n");</span></span> |
| <span id="L152"><span class="lineNum"> 152</span> :<span class="tlaGNC"> 1 : goto failed;</span></span> |
| <span id="L153"><span class="lineNum"> 153</span> : : } else {</span> |
| <span id="L154"><span class="lineNum"> 154</span> : : /*</span> |
| <span id="L155"><span class="lineNum"> 155</span> : : * The OF NVRAM format requires config strings to be NUL</span> |
| <span id="L156"><span class="lineNum"> 156</span> : : * terminated and unused memory to be set to zero. Well behaved</span> |
| <span id="L157"><span class="lineNum"> 157</span> : : * software should ensure this is done for us, but we should</span> |
| <span id="L158"><span class="lineNum"> 158</span> : : * always check.</span> |
| <span id="L159"><span class="lineNum"> 159</span> : : */</span> |
| <span id="L160"><span class="lineNum"> 160</span> :<span class="tlaGNC"> 16 : const char *last_byte = (const char *) skiboot_part_hdr +</span></span> |
| <span id="L161"><span class="lineNum"> 161</span> :<span class="tlaGNC"> 8 : be16_to_cpu(skiboot_part_hdr->len) * 16 - 1;</span></span> |
| <span id="L162"><span class="lineNum"> 162</span> : : </span> |
| <span id="L163"><span class="lineNum"> 163</span> :<span class="tlaGNC"> 8 : if (*last_byte != 0) {</span></span> |
| <span id="L164"><span class="lineNum"> 164</span> :<span class="tlaGNC"> 1 : prerror("NVRAM: Skiboot private partition is not NUL terminated");</span></span> |
| <span id="L165"><span class="lineNum"> 165</span> :<span class="tlaGNC"> 1 : goto failed;</span></span> |
| <span id="L166"><span class="lineNum"> 166</span> : : }</span> |
| <span id="L167"><span class="lineNum"> 167</span> : : }</span> |
| <span id="L168"><span class="lineNum"> 168</span> : : </span> |
| <span id="L169"><span class="lineNum"> 169</span> :<span class="tlaGNC"> 7 : prlog(PR_INFO, "NVRAM: Layout appears sane\n");</span></span> |
| <span id="L170"><span class="lineNum"> 170</span> :<span class="tlaGNC"> 7 : assert(skiboot_part_hdr);</span></span> |
| <span id="L171"><span class="lineNum"> 171</span> :<span class="tlaGNC"> 7 : return 0;</span></span> |
| <span id="L172"><span class="lineNum"> 172</span> :<span class="tlaGNC"> 7 : failed:</span></span> |
| <span id="L173"><span class="lineNum"> 173</span> :<span class="tlaGNC"> 7 : return -1;</span></span> |
| <span id="L174"><span class="lineNum"> 174</span> : : }</span> |
| <span id="L175"><span class="lineNum"> 175</span> : : </span> |
| <span id="L176"><span class="lineNum"> 176</span> :<span class="tlaGNC"> 7 : static const char *find_next_key(const char *start, const char *end)</span></span> |
| <span id="L177"><span class="lineNum"> 177</span> : : {</span> |
| <span id="L178"><span class="lineNum"> 178</span> : : /*</span> |
| <span id="L179"><span class="lineNum"> 179</span> : : * Unused parts of the partition are set to NUL. If we hit two</span> |
| <span id="L180"><span class="lineNum"> 180</span> : : * NULs in a row then we assume that we have hit the end of the</span> |
| <span id="L181"><span class="lineNum"> 181</span> : : * partition.</span> |
| <span id="L182"><span class="lineNum"> 182</span> : : */</span> |
| <span id="L183"><span class="lineNum"> 183</span> :<span class="tlaGNC"> 7 : if (*start == 0)</span></span> |
| <span id="L184"><span class="lineNum"> 184</span> :<span class="tlaGNC"> 3 : return NULL;</span></span> |
| <span id="L185"><span class="lineNum"> 185</span> : : </span> |
| <span id="L186"><span class="lineNum"> 186</span> :<span class="tlaGNC"> 9 : while (start < end) {</span></span> |
| <span id="L187"><span class="lineNum"> 187</span> :<span class="tlaGNC"> 9 : if (*start == 0)</span></span> |
| <span id="L188"><span class="lineNum"> 188</span> :<span class="tlaGNC"> 4 : return start + 1;</span></span> |
| <span id="L189"><span class="lineNum"> 189</span> : : </span> |
| <span id="L190"><span class="lineNum"> 190</span> :<span class="tlaGNC"> 5 : start++;</span></span> |
| <span id="L191"><span class="lineNum"> 191</span> : : }</span> |
| <span id="L192"><span class="lineNum"> 192</span> : : </span> |
| <span id="L193"><span class="lineNum"> 193</span> :<span class="tlaUNC tlaBgUNC"> 0 : return NULL;</span></span> |
| <span id="L194"><span class="lineNum"> 194</span> : : }</span> |
| <span id="L195"><span class="lineNum"> 195</span> : : </span> |
| <span id="L196"><span class="lineNum"> 196</span> :<span class="tlaUNC"> 0 : static void nvram_dangerous(const char *key)</span></span> |
| <span id="L197"><span class="lineNum"> 197</span> : : {</span> |
| <span id="L198"><span class="lineNum"> 198</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " ___________________________________________________________\n");</span></span> |
| <span id="L199"><span class="lineNum"> 199</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, "< Dangerous NVRAM option: %s\n", key);</span></span> |
| <span id="L200"><span class="lineNum"> 200</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " -----------------------------------------------------------\n");</span></span> |
| <span id="L201"><span class="lineNum"> 201</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " \\ \n");</span></span> |
| <span id="L202"><span class="lineNum"> 202</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " \\ WW \n");</span></span> |
| <span id="L203"><span class="lineNum"> 203</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " <^ \\___/| \n");</span></span> |
| <span id="L204"><span class="lineNum"> 204</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " \\ / \n");</span></span> |
| <span id="L205"><span class="lineNum"> 205</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " \\_ _/ \n");</span></span> |
| <span id="L206"><span class="lineNum"> 206</span> :<span class="tlaUNC"> 0 : prlog(PR_ERR, " }{ \n");</span></span> |
| <span id="L207"><span class="lineNum"> 207</span> :<span class="tlaUNC"> 0 : }</span></span> |
| <span id="L208"><span class="lineNum"> 208</span> : : </span> |
| <span id="L209"><span class="lineNum"> 209</span> : : </span> |
| <span id="L210"><span class="lineNum"> 210</span> : : /*</span> |
| <span id="L211"><span class="lineNum"> 211</span> : : * nvram_query_safe/dangerous() - Searches skiboot NVRAM partition</span> |
| <span id="L212"><span class="lineNum"> 212</span> : : * for a key=value pair.</span> |
| <span id="L213"><span class="lineNum"> 213</span> : : *</span> |
| <span id="L214"><span class="lineNum"> 214</span> : : * Dangerous means it should only be used for testing as it may</span> |
| <span id="L215"><span class="lineNum"> 215</span> : : * mask issues. Safe is ok for long term use.</span> |
| <span id="L216"><span class="lineNum"> 216</span> : : *</span> |
| <span id="L217"><span class="lineNum"> 217</span> : : * Returns a pointer to a NUL terminated string that contains the value</span> |
| <span id="L218"><span class="lineNum"> 218</span> : : * associated with the given key.</span> |
| <span id="L219"><span class="lineNum"> 219</span> : : */</span> |
| <span id="L220"><span class="lineNum"> 220</span> :<span class="tlaGNC tlaBgGNC"> 5 : static const char *__nvram_query(const char *key, bool dangerous)</span></span> |
| <span id="L221"><span class="lineNum"> 221</span> : : {</span> |
| <span id="L222"><span class="lineNum"> 222</span> : : const char *part_end, *start;</span> |
| <span id="L223"><span class="lineNum"> 223</span> :<span class="tlaGNC"> 5 : int key_len = strlen(key);</span></span> |
| <span id="L224"><span class="lineNum"> 224</span> : : </span> |
| <span id="L225"><span class="lineNum"> 225</span> :<span class="tlaGNC"> 5 : assert(key);</span></span> |
| <span id="L226"><span class="lineNum"> 226</span> : : </span> |
| <span id="L227"><span class="lineNum"> 227</span> :<span class="tlaGNC"> 5 : if (!nvram_has_loaded()) {</span></span> |
| <span id="L228"><span class="lineNum"> 228</span> :<span class="tlaUNC tlaBgUNC"> 0 : prlog(PR_DEBUG,</span></span> |
| <span id="L229"><span class="lineNum"> 229</span> : : "NVRAM: Query for '%s' must wait for NVRAM to load\n",</span> |
| <span id="L230"><span class="lineNum"> 230</span> : : key);</span> |
| <span id="L231"><span class="lineNum"> 231</span> :<span class="tlaUNC"> 0 : if (!nvram_wait_for_load()) {</span></span> |
| <span id="L232"><span class="lineNum"> 232</span> :<span class="tlaUNC"> 0 : prlog(PR_CRIT, "NVRAM: Failed to load\n");</span></span> |
| <span id="L233"><span class="lineNum"> 233</span> :<span class="tlaUNC"> 0 : return NULL;</span></span> |
| <span id="L234"><span class="lineNum"> 234</span> : : }</span> |
| <span id="L235"><span class="lineNum"> 235</span> : : }</span> |
| <span id="L236"><span class="lineNum"> 236</span> : : </span> |
| <span id="L237"><span class="lineNum"> 237</span> : : /*</span> |
| <span id="L238"><span class="lineNum"> 238</span> : : * The running OS can modify the NVRAM as it pleases so we need to be</span> |
| <span id="L239"><span class="lineNum"> 239</span> : : * a little paranoid and check that it's ok before we try parse it.</span> |
| <span id="L240"><span class="lineNum"> 240</span> : : *</span> |
| <span id="L241"><span class="lineNum"> 241</span> : : * NB: nvram_validate() can update skiboot_part_hdr</span> |
| <span id="L242"><span class="lineNum"> 242</span> : : */</span> |
| <span id="L243"><span class="lineNum"> 243</span> :<span class="tlaGNC tlaBgGNC"> 5 : if (!nvram_validate())</span></span> |
| <span id="L244"><span class="lineNum"> 244</span> :<span class="tlaUNC tlaBgUNC"> 0 : return NULL;</span></span> |
| <span id="L245"><span class="lineNum"> 245</span> : : </span> |
| <span id="L246"><span class="lineNum"> 246</span> :<span class="tlaGNC tlaBgGNC"> 5 : assert(skiboot_part_hdr);</span></span> |
| <span id="L247"><span class="lineNum"> 247</span> : : </span> |
| <span id="L248"><span class="lineNum"> 248</span> :<span class="tlaGNC"> 10 : part_end = (const char *) skiboot_part_hdr</span></span> |
| <span id="L249"><span class="lineNum"> 249</span> :<span class="tlaGNC"> 5 : + be16_to_cpu(skiboot_part_hdr->len) * 16 - 1;</span></span> |
| <span id="L250"><span class="lineNum"> 250</span> : : </span> |
| <span id="L251"><span class="lineNum"> 251</span> :<span class="tlaGNC"> 5 : start = (const char *) skiboot_part_hdr</span></span> |
| <span id="L252"><span class="lineNum"> 252</span> : : + sizeof(*skiboot_part_hdr);</span> |
| <span id="L253"><span class="lineNum"> 253</span> : : </span> |
| <span id="L254"><span class="lineNum"> 254</span> :<span class="tlaGNC"> 5 : if (!key_len) {</span></span> |
| <span id="L255"><span class="lineNum"> 255</span> :<span class="tlaUNC tlaBgUNC"> 0 : prlog(PR_WARNING, "NVRAM: search key is empty!\n");</span></span> |
| <span id="L256"><span class="lineNum"> 256</span> :<span class="tlaUNC"> 0 : return NULL;</span></span> |
| <span id="L257"><span class="lineNum"> 257</span> : : }</span> |
| <span id="L258"><span class="lineNum"> 258</span> : : </span> |
| <span id="L259"><span class="lineNum"> 259</span> :<span class="tlaGNC tlaBgGNC"> 5 : if (key_len > 32)</span></span> |
| <span id="L260"><span class="lineNum"> 260</span> :<span class="tlaUNC tlaBgUNC"> 0 : prlog(PR_WARNING, "NVRAM: search key '%s' is longer than 32 chars\n", key);</span></span> |
| <span id="L261"><span class="lineNum"> 261</span> : : </span> |
| <span id="L262"><span class="lineNum"> 262</span> :<span class="tlaGNC tlaBgGNC"> 12 : while (start) {</span></span> |
| <span id="L263"><span class="lineNum"> 263</span> :<span class="tlaGNC"> 9 : int remaining = part_end - start;</span></span> |
| <span id="L264"><span class="lineNum"> 264</span> : : </span> |
| <span id="L265"><span class="lineNum"> 265</span> :<span class="tlaGNC"> 9 : prlog(PR_TRACE, "NVRAM: '%s' (%lu)\n",</span></span> |
| <span id="L266"><span class="lineNum"> 266</span> : : start, strlen(start));</span> |
| <span id="L267"><span class="lineNum"> 267</span> : : </span> |
| <span id="L268"><span class="lineNum"> 268</span> :<span class="tlaGNC"> 9 : if (key_len + 1 > remaining)</span></span> |
| <span id="L269"><span class="lineNum"> 269</span> :<span class="tlaUNC tlaBgUNC"> 0 : return NULL;</span></span> |
| <span id="L270"><span class="lineNum"> 270</span> : : </span> |
| <span id="L271"><span class="lineNum"> 271</span> :<span class="tlaGNC tlaBgGNC"> 9 : if (!strncmp(key, start, key_len) && start[key_len] == '=') {</span></span> |
| <span id="L272"><span class="lineNum"> 272</span> :<span class="tlaGNC"> 2 : const char *value = &start[key_len + 1];</span></span> |
| <span id="L273"><span class="lineNum"> 273</span> : : </span> |
| <span id="L274"><span class="lineNum"> 274</span> :<span class="tlaGNC"> 2 : prlog(PR_DEBUG, "NVRAM: Searched for '%s' found '%s'\n",</span></span> |
| <span id="L275"><span class="lineNum"> 275</span> : : key, value);</span> |
| <span id="L276"><span class="lineNum"> 276</span> : : </span> |
| <span id="L277"><span class="lineNum"> 277</span> :<span class="tlaGNC"> 2 : if (dangerous)</span></span> |
| <span id="L278"><span class="lineNum"> 278</span> :<span class="tlaUNC tlaBgUNC"> 0 : nvram_dangerous(start);</span></span> |
| <span id="L279"><span class="lineNum"> 279</span> :<span class="tlaGNC tlaBgGNC"> 2 : return value;</span></span> |
| <span id="L280"><span class="lineNum"> 280</span> : : }</span> |
| <span id="L281"><span class="lineNum"> 281</span> : : </span> |
| <span id="L282"><span class="lineNum"> 282</span> :<span class="tlaGNC"> 7 : start = find_next_key(start, part_end);</span></span> |
| <span id="L283"><span class="lineNum"> 283</span> : : }</span> |
| <span id="L284"><span class="lineNum"> 284</span> : : </span> |
| <span id="L285"><span class="lineNum"> 285</span> :<span class="tlaGNC"> 3 : prlog(PR_DEBUG, "NVRAM: '%s' not found\n", key);</span></span> |
| <span id="L286"><span class="lineNum"> 286</span> : : </span> |
| <span id="L287"><span class="lineNum"> 287</span> :<span class="tlaGNC"> 3 : return NULL;</span></span> |
| <span id="L288"><span class="lineNum"> 288</span> : : }</span> |
| <span id="L289"><span class="lineNum"> 289</span> : : </span> |
| <span id="L290"><span class="lineNum"> 290</span> :<span class="tlaGNC"> 5 : const char *nvram_query_safe(const char *key)</span></span> |
| <span id="L291"><span class="lineNum"> 291</span> : : {</span> |
| <span id="L292"><span class="lineNum"> 292</span> :<span class="tlaGNC"> 5 : return __nvram_query(key, false);</span></span> |
| <span id="L293"><span class="lineNum"> 293</span> : : }</span> |
| <span id="L294"><span class="lineNum"> 294</span> : : </span> |
| <span id="L295"><span class="lineNum"> 295</span> :<span class="tlaUNC tlaBgUNC"> 0 : const char *nvram_query_dangerous(const char *key)</span></span> |
| <span id="L296"><span class="lineNum"> 296</span> : : {</span> |
| <span id="L297"><span class="lineNum"> 297</span> :<span class="tlaUNC"> 0 : return __nvram_query(key, true);</span></span> |
| <span id="L298"><span class="lineNum"> 298</span> : : }</span> |
| <span id="L299"><span class="lineNum"> 299</span> : : </span> |
| <span id="L300"><span class="lineNum"> 300</span> : : /*</span> |
| <span id="L301"><span class="lineNum"> 301</span> : : * nvram_query_eq_safe/dangerous() - Check if the given 'key' exists</span> |
| <span id="L302"><span class="lineNum"> 302</span> : : * and is set to 'value'.</span> |
| <span id="L303"><span class="lineNum"> 303</span> : : *</span> |
| <span id="L304"><span class="lineNum"> 304</span> : : * Dangerous means it should only be used for testing as it may</span> |
| <span id="L305"><span class="lineNum"> 305</span> : : * mask issues. Safe is ok for long term use.</span> |
| <span id="L306"><span class="lineNum"> 306</span> : : *</span> |
| <span id="L307"><span class="lineNum"> 307</span> : : * Note: Its an error to check for non-existence of a key</span> |
| <span id="L308"><span class="lineNum"> 308</span> : : * by passing 'value == NULL' as a key's value can never be</span> |
| <span id="L309"><span class="lineNum"> 309</span> : : * NULL in nvram.</span> |
| <span id="L310"><span class="lineNum"> 310</span> : : */</span> |
| <span id="L311"><span class="lineNum"> 311</span> :<span class="tlaUNC"> 0 : static bool __nvram_query_eq(const char *key, const char *value, bool dangerous)</span></span> |
| <span id="L312"><span class="lineNum"> 312</span> : : {</span> |
| <span id="L313"><span class="lineNum"> 313</span> :<span class="tlaUNC"> 0 : const char *s = __nvram_query(key, dangerous);</span></span> |
| <span id="L314"><span class="lineNum"> 314</span> : : </span> |
| <span id="L315"><span class="lineNum"> 315</span> :<span class="tlaUNC"> 0 : if (!s)</span></span> |
| <span id="L316"><span class="lineNum"> 316</span> :<span class="tlaUNC"> 0 : return false;</span></span> |
| <span id="L317"><span class="lineNum"> 317</span> : : </span> |
| <span id="L318"><span class="lineNum"> 318</span> :<span class="tlaUNC"> 0 : assert(value != NULL);</span></span> |
| <span id="L319"><span class="lineNum"> 319</span> :<span class="tlaUNC"> 0 : return !strcmp(s, value);</span></span> |
| <span id="L320"><span class="lineNum"> 320</span> : : }</span> |
| <span id="L321"><span class="lineNum"> 321</span> : : </span> |
| <span id="L322"><span class="lineNum"> 322</span> :<span class="tlaUNC"> 0 : bool nvram_query_eq_safe(const char *key, const char *value)</span></span> |
| <span id="L323"><span class="lineNum"> 323</span> : : {</span> |
| <span id="L324"><span class="lineNum"> 324</span> :<span class="tlaUNC"> 0 : return __nvram_query_eq(key, value, false);</span></span> |
| <span id="L325"><span class="lineNum"> 325</span> : : }</span> |
| <span id="L326"><span class="lineNum"> 326</span> : : </span> |
| <span id="L327"><span class="lineNum"> 327</span> :<span class="tlaUNC"> 0 : bool nvram_query_eq_dangerous(const char *key, const char *value)</span></span> |
| <span id="L328"><span class="lineNum"> 328</span> : : {</span> |
| <span id="L329"><span class="lineNum"> 329</span> :<span class="tlaUNC"> 0 : return __nvram_query_eq(key, value, true);</span></span> |
| <span id="L330"><span class="lineNum"> 330</span> : : }</span> |
| <span id="L331"><span class="lineNum"> 331</span> : : </span> |
| </pre> |
| </td> |
| </tr> |
| </table> |
| <br> |
| |
| <table width="100%" border=0 cellspacing=0 cellpadding=0> |
| <tr><td class="ruler"><img src="../glass.png" width=3 height=3 alt=""></td></tr> |
| <tr><td class="versionInfo">Generated by: <a href="https://github.com//linux-test-project/lcov" target="_parent">LCOV version 2.0-1</a></td></tr> |
| </table> |
| <br> |
| |
| </body> |
| </html> |
