1 #pragma once
2 
3 #include "additional_data.hpp"
4 #include "data_interface.hpp"
5 #include "private_header.hpp"
6 #include "registry.hpp"
7 #include "src.hpp"
8 #include "user_data.hpp"
9 #include "user_data_formats.hpp"
10 #include "user_header.hpp"
11 
12 #include <memory>
13 #include <vector>
14 
15 namespace openpower
16 {
17 namespace pels
18 {
19 
20 /**
21  * @brief Contains information about an FFDC file.
22  */
23 struct PelFFDCfile
24 {
25     UserDataFormat format;
26     uint8_t subType;
27     uint8_t version;
28     int fd;
29 };
30 
31 using PelFFDC = std::vector<PelFFDCfile>;
32 
33 /** @class PEL
34  *
35  * @brief This class represents a specific event log format referred to as a
36  * Platform Event Log.
37  *
38  * Every field in a PEL are in structures call sections, of which there are
39  * several types.  Some sections are required, and some are optional.  In some
40  * cases there may be more than one instance of a section type.
41  *
42  * The only two required sections for every type of PEL are the Private Header
43  * section and User Header section, which must be in the first and second
44  * positions, respectively.
45  *
46  * Every section starts with an 8 byte section header, which has the section
47  * size and type, among other things.
48  *
49  * This class represents all sections with objects.
50  *
51  * The class can be constructed:
52  * - From a full formed flattened PEL.
53  * - From scratch based on an OpenBMC event and its corresponding PEL message
54  *   registry entry.
55  *
56  * The data() method allows one to retrieve the PEL as a vector<uint8_t>.  This
57  * is the format in which it is stored and transmitted.
58  */
59 class PEL
60 {
61   public:
62     PEL() = delete;
63     ~PEL() = default;
64     PEL(const PEL&) = delete;
65     PEL& operator=(const PEL&) = delete;
66     PEL(PEL&&) = delete;
67     PEL& operator=(PEL&&) = delete;
68 
69     /**
70      * @brief Constructor
71      *
72      * Build a PEL from raw data.
73      *
74      * Note: Neither this nor the following constructor can take a const vector&
75      * because the Stream class that is used to read from the vector cannot take
76      * a const.  The alternative is to make a copy of the data, but as PELs can
77      * be up to 16KB that is undesireable.
78      *
79      * @param[in] data - The PEL data
80      */
81     PEL(std::vector<uint8_t>& data);
82 
83     /**
84      * @brief Constructor
85      *
86      * Build a PEL from the raw data.
87      *
88      * @param[in] data - the PEL data
89      * @param[in] obmcLogID - the corresponding OpenBMC event log ID
90      */
91     PEL(std::vector<uint8_t>& data, uint32_t obmcLogID);
92 
93     /**
94      * @brief Constructor
95      *
96      * Creates a PEL from an OpenBMC event log and its message
97      * registry entry.
98      *
99      * @param[in] entry - The message registry entry for this error
100      * @param[in] obmcLogID - ID of corresponding OpenBMC event log
101      * @param[in] timestamp - Timestamp from the event log
102      * @param[in] severity - Severity from the event log
103      * @param[in] additionalData - The AdditionalData contents
104      * @param[in] ffdcFiles - FFCD files that go into UserData sections
105      * @param[in] dataIface - The data interface object
106      */
107     PEL(const openpower::pels::message::Entry& entry, uint32_t obmcLogID,
108         uint64_t timestamp, phosphor::logging::Entry::Level severity,
109         const AdditionalData& additionalData, const PelFFDC& ffdcFiles,
110         const DataInterfaceBase& dataIface);
111 
112     /**
113      * @brief Convenience function to return the log ID field from the
114      *        Private Header section.
115      *
116      * @return uint32_t - the ID
117      */
118     uint32_t id() const
119     {
120         return _ph->id();
121     }
122 
123     /**
124      * @brief Convenience function to return the PLID field from the
125      *        Private Header section.
126      *
127      * @return uint32_t - the PLID
128      */
129     uint32_t plid() const
130     {
131         return _ph->plid();
132     }
133 
134     /**
135      * @brief Convenience function to return the OpenBMC event log ID field
136      * from the Private Header section.
137      *
138      * @return uint32_t - the OpenBMC event log ID
139      */
140     uint32_t obmcLogID() const
141     {
142         return _ph->obmcLogID();
143     }
144 
145     /**
146      * @brief Convenience function to return the commit time field from
147      *        the Private Header section.
148      *
149      * @return BCDTime - the timestamp
150      */
151     BCDTime commitTime() const
152     {
153         return _ph->commitTimestamp();
154     }
155 
156     /**
157      * @brief Convenience function to return the create time field from
158      *        the Private Header section.
159      *
160      * @return BCDTime - the timestamp
161      */
162     BCDTime createTime() const
163     {
164         return _ph->createTimestamp();
165     }
166 
167     /**
168      * @brief Gives access to the Private Header section class
169      *
170      * @return const PrivateHeader& - the private header
171      */
172     const PrivateHeader& privateHeader() const
173     {
174         return *_ph;
175     }
176 
177     /**
178      * @brief Gives access to the User Header section class
179      *
180      * @return const UserHeader& - the user header
181      */
182     const UserHeader& userHeader() const
183     {
184         return *_uh;
185     }
186 
187     /**
188      * @brief Gives access to the primary SRC's section class
189      *
190      * This is technically an optional section, so the return
191      * value is an std::optional<SRC*>.
192      *
193      * @return std::optional<SRC*> - the SRC section object
194      */
195     std::optional<SRC*> primarySRC() const;
196 
197     /**
198      * @brief Returns the optional sections, which is everything but
199      *        the Private and User Headers.
200      *
201      * @return const std::vector<std::unique_ptr<Section>>&
202      */
203     const std::vector<std::unique_ptr<Section>>& optionalSections() const
204     {
205         return _optionalSections;
206     }
207 
208     /**
209      * @brief Returns the PEL data.
210      *
211      * @return std::vector<uint8_t> - the raw PEL data
212      */
213     std::vector<uint8_t> data() const;
214 
215     /**
216      * @brief Returns the size of the PEL
217      *
218      * @return size_t The PEL size in bytes
219      */
220     size_t size() const;
221 
222     /**
223      * @brief Says if the PEL is valid (the sections are all valid)
224      *
225      * @return bool - if the PEL is valid
226      */
227     bool valid() const;
228 
229     /**
230      * @brief Sets the commit timestamp to the current time
231      */
232     void setCommitTime();
233 
234     /**
235      * @brief Sets the error log ID field to a unique ID.
236      */
237     void assignID();
238 
239     /**
240      * @brief Output a PEL in JSON.
241      * @param[in] registry - Registry object reference
242      */
243     void toJSON(message::Registry& registry) const;
244 
245     /**
246      * @brief Sets the host transmission state in the User Header
247      *
248      * @param[in] state - The state value
249      */
250     void setHostTransmissionState(TransmissionState state)
251     {
252         _uh->setHostTransmissionState(static_cast<uint8_t>(state));
253     }
254 
255     /**
256      * @brief Returns the host transmission state
257      *
258      * @return HostTransmissionState - The state
259      */
260     TransmissionState hostTransmissionState() const
261     {
262         return static_cast<TransmissionState>(_uh->hostTransmissionState());
263     }
264 
265     /**
266      * @brief Sets the HMC transmission state in the User Header
267      *
268      * @param[in] state - The state value
269      */
270     void setHMCTransmissionState(TransmissionState state)
271     {
272         _uh->setHMCTransmissionState(static_cast<uint8_t>(state));
273     }
274 
275     /**
276      * @brief Returns the HMC transmission state
277      *
278      * @return HMCTransmissionState - The state
279      */
280     TransmissionState hmcTransmissionState() const
281     {
282         return static_cast<TransmissionState>(_uh->hmcTransmissionState());
283     }
284 
285   private:
286     /**
287      * @brief Builds the section objects from a PEL data buffer
288      *
289      * Note: The data parameter cannot be const for the same reasons
290      * as listed in the constructor.
291      *
292      * @param[in] data - The PEL data
293      * @param[in] obmcLogID - The OpenBMC event log ID to use for that
294      *                        field in the Private Header.
295      */
296     void populateFromRawData(std::vector<uint8_t>& data, uint32_t obmcLogID);
297 
298     /**
299      * @brief Flattens the PEL objects into the buffer
300      *
301      * @param[out] pelBuffer - What the data will be written to
302      */
303     void flatten(std::vector<uint8_t>& pelBuffer) const;
304 
305     /**
306      * @brief Check that the PEL fields that need to be in agreement
307      *        with each other are, and fix them up if necessary.
308      */
309     void checkRulesAndFix();
310 
311     /**
312      * @brief Returns a map of the section IDs that appear more than once
313      *        in the PEL.  The data value for each entry will be set to 0.
314      *
315      * @return std::map<uint16_t, size_t>
316      */
317     std::map<uint16_t, size_t> getPluralSections() const;
318 
319     /**
320      * @brief The PEL Private Header section
321      */
322     std::unique_ptr<PrivateHeader> _ph;
323 
324     /**
325      * @brief The PEL User Header section
326      */
327     std::unique_ptr<UserHeader> _uh;
328 
329     /**
330      * @brief Holds all sections by the PH and UH.
331      */
332     std::vector<std::unique_ptr<Section>> _optionalSections;
333 
334     /**
335      * @brief helper function for printing PELs.
336      * @param[in] Section& - section object reference
337      * @param[in] std::string - PEL string
338      * @param[in|out] pluralSections - Map used to track sections counts for
339      *                                 when there is more than 1.
340      * @param[in] registry - Registry object reference
341      */
342     void printSectionInJSON(const Section& section, std::string& buf,
343                             std::map<uint16_t, size_t>& pluralSections,
344                             message::Registry& registry) const;
345 
346     /**
347      * @brief The maximum size a PEL can be in bytes.
348      */
349     static constexpr size_t _maxPELSize = 16384;
350 };
351 
352 namespace util
353 {
354 
355 /**
356  * @brief Create a UserData section containing the AdditionalData
357  *        contents as a JSON string.
358  *
359  * @param[in] ad - The AdditionalData contents
360  *
361  * @return std::unique_ptr<UserData> - The section
362  */
363 std::unique_ptr<UserData> makeADUserDataSection(const AdditionalData& ad);
364 
365 /**
366  * @brief Create a UserData section containing various useful pieces
367  *        of system information as a JSON string.
368  *
369  * @param[in] ad - The AdditionalData contents
370  * @param[in] dataIface - The data interface object
371  *
372  * @return std::unique_ptr<UserData> - The section
373  */
374 std::unique_ptr<UserData>
375     makeSysInfoUserDataSection(const AdditionalData& ad,
376                                const DataInterfaceBase& dataIface);
377 
378 /**
379  * @brief Create a UserData section that contains the data in the file
380  *        pointed to by the file descriptor passed in.
381  *
382  * @param[in] componentID - The component ID of the PEL creator
383  * @param[in] file - The FFDC file information
384  */
385 std::unique_ptr<UserData> makeFFDCuserDataSection(uint16_t componentID,
386                                                   const PelFFDCfile& file);
387 } // namespace util
388 
389 } // namespace pels
390 } // namespace openpower
391