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      * @param[in] plugins - Vector of strings of plugins found in filesystem
243      */
244     void toJSON(message::Registry& registry,
245                 const std::vector<std::string>& plugins) const;
246 
247     /**
248      * @brief Sets the host transmission state in the User Header
249      *
250      * @param[in] state - The state value
251      */
252     void setHostTransmissionState(TransmissionState state)
253     {
254         _uh->setHostTransmissionState(static_cast<uint8_t>(state));
255     }
256 
257     /**
258      * @brief Returns the host transmission state
259      *
260      * @return HostTransmissionState - The state
261      */
262     TransmissionState hostTransmissionState() const
263     {
264         return static_cast<TransmissionState>(_uh->hostTransmissionState());
265     }
266 
267     /**
268      * @brief Sets the HMC transmission state in the User Header
269      *
270      * @param[in] state - The state value
271      */
272     void setHMCTransmissionState(TransmissionState state)
273     {
274         _uh->setHMCTransmissionState(static_cast<uint8_t>(state));
275     }
276 
277     /**
278      * @brief Returns the HMC transmission state
279      *
280      * @return HMCTransmissionState - The state
281      */
282     TransmissionState hmcTransmissionState() const
283     {
284         return static_cast<TransmissionState>(_uh->hmcTransmissionState());
285     }
286 
287     /**
288      * @brief Returns true if any callout is present in the primary SRC
289      *
290      * @return true if callout present, false otherwise
291      */
292     bool isCalloutPresent() const;
293 
294   private:
295     /**
296      * @brief Builds the section objects from a PEL data buffer
297      *
298      * Note: The data parameter cannot be const for the same reasons
299      * as listed in the constructor.
300      *
301      * @param[in] data - The PEL data
302      * @param[in] obmcLogID - The OpenBMC event log ID to use for that
303      *                        field in the Private Header.
304      */
305     void populateFromRawData(std::vector<uint8_t>& data, uint32_t obmcLogID);
306 
307     /**
308      * @brief Flattens the PEL objects into the buffer
309      *
310      * @param[out] pelBuffer - What the data will be written to
311      */
312     void flatten(std::vector<uint8_t>& pelBuffer) const;
313 
314     /**
315      * @brief Check that the PEL fields that need to be in agreement
316      *        with each other are, and fix them up if necessary.
317      */
318     void checkRulesAndFix();
319 
320     /**
321      * @brief Returns a map of the section IDs that appear more than once
322      *        in the PEL.  The data value for each entry will be set to 0.
323      *
324      * @return std::map<uint16_t, size_t>
325      */
326     std::map<uint16_t, size_t> getPluralSections() const;
327 
328     /**
329      * @brief Adds the UserData section to this PEL object,
330      *        shrinking it if necessary
331      *
332      * @param[in] userData - The section to add
333      *
334      * @return bool - If the section was added or not.
335      */
336     bool addUserDataSection(std::unique_ptr<UserData> userData);
337 
338     /**
339      * @brief helper function for printing PELs.
340      * @param[in] Section& - section object reference
341      * @param[in] std::string - PEL string
342      * @param[in|out] pluralSections - Map used to track sections counts for
343      *                                 when there is more than 1.
344      * @param[in] registry - Registry object reference
345      * @param[in] plugins - Vector of strings of plugins found in filesystem
346      * @param[in] creatorID - Creator Subsystem ID (only for UserData section)
347      */
348     void printSectionInJSON(const Section& section, std::string& buf,
349                             std::map<uint16_t, size_t>& pluralSections,
350                             message::Registry& registry,
351                             const std::vector<std::string>& plugins,
352                             uint8_t creatorID = 0) const;
353 
354     /**
355      * @brief Returns any callout JSON found in the FFDC files.
356      *
357      * Looks for an FFDC file that is JSON format and has the
358      * sub-type value set to 0xCA and returns its data as a JSON object.
359      *
360      * @param[in] ffdcFiles - FFCD files that go into UserData sections
361      *
362      * @return json - The callout JSON, or an empty object if not found
363      */
364     nlohmann::json getCalloutJSON(const PelFFDC& ffdcFiles);
365 
366     /**
367      * @brief The PEL Private Header section
368      */
369     std::unique_ptr<PrivateHeader> _ph;
370 
371     /**
372      * @brief The PEL User Header section
373      */
374     std::unique_ptr<UserHeader> _uh;
375 
376     /**
377      * @brief Holds all sections by the PH and UH.
378      */
379     std::vector<std::unique_ptr<Section>> _optionalSections;
380 
381     /**
382      * @brief The maximum size a PEL can be in bytes.
383      */
384     static constexpr size_t _maxPELSize = 16384;
385 };
386 
387 namespace util
388 {
389 
390 /**
391  * @brief Creates a UserData section object that contains JSON.
392  *
393  * @param[in] json - The JSON contents
394  *
395  * @return std::unique_ptr<UserData> - The UserData object
396  */
397 std::unique_ptr<UserData> makeJSONUserDataSection(const nlohmann::json& json);
398 
399 /**
400  * @brief Create a UserData section containing the AdditionalData
401  *        contents as a JSON string.
402  *
403  * @param[in] ad - The AdditionalData contents
404  *
405  * @return std::unique_ptr<UserData> - The section
406  */
407 std::unique_ptr<UserData> makeADUserDataSection(const AdditionalData& ad);
408 
409 /**
410  * @brief Create a UserData section containing various useful pieces
411  *        of system information as a JSON string.
412  *
413  * @param[in] ad - The AdditionalData contents
414  * @param[in] dataIface - The data interface object
415  *
416  * @return std::unique_ptr<UserData> - The section
417  */
418 std::unique_ptr<UserData>
419     makeSysInfoUserDataSection(const AdditionalData& ad,
420                                const DataInterfaceBase& dataIface);
421 
422 /**
423  * @brief Reads data from an opened file descriptor.
424  *
425  * @param[in] fd - The FD to read from
426  *
427  * @return std::vector<uint8_t> - The data read
428  */
429 std::vector<uint8_t> readFD(int fd);
430 
431 /**
432  * @brief Create a UserData section that contains the data in the file
433  *        pointed to by the file descriptor passed in.
434  *
435  * @param[in] componentID - The component ID of the PEL creator
436  * @param[in] file - The FFDC file information
437  */
438 std::unique_ptr<UserData> makeFFDCuserDataSection(uint16_t componentID,
439                                                   const PelFFDCfile& file);
440 } // namespace util
441 
442 } // namespace pels
443 } // namespace openpower
444