blob: e55808f79afb4d96d33b4039ff124d81141d0e9c [file] [log] [blame]
#pragma once
#include "bcd_time.hpp"
#include "pel.hpp"
#include <algorithm>
#include <bitset>
#include <filesystem>
#include <map>
namespace openpower
{
namespace pels
{
/**
* @class Repository
*
* The class handles saving and retrieving PELs on the BMC.
*/
class Repository
{
public:
/**
* @brief Structure of commonly used PEL attributes.
*/
struct PELAttributes
{
std::filesystem::path path;
std::bitset<16> actionFlags;
TransmissionState hostState;
TransmissionState hmcState;
PELAttributes() = delete;
PELAttributes(const std::filesystem::path& p, uint16_t flags,
TransmissionState hostState, TransmissionState hmcState) :
path(p),
actionFlags(flags), hostState(hostState), hmcState(hmcState)
{
}
};
/**
* @brief A structure that holds both the PEL and corresponding
* OpenBMC IDs.
* Used for correlating the IDs with their data files for quick
* lookup. To find a PEL based on just one of the IDs, just use
* the constructor that takes that ID.
*/
struct LogID
{
struct Pel
{
uint32_t id;
explicit Pel(uint32_t i) : id(i)
{
}
};
struct Obmc
{
uint32_t id;
explicit Obmc(uint32_t i) : id(i)
{
}
};
Pel pelID;
Obmc obmcID;
LogID(Pel pel, Obmc obmc) : pelID(pel), obmcID(obmc)
{
}
explicit LogID(Pel id) : pelID(id), obmcID(0)
{
}
explicit LogID(Obmc id) : pelID(0), obmcID(id)
{
}
LogID() = delete;
/**
* @brief A == operator that will match on either ID
* being equal if the other is zero, so that
* one can look up a PEL with just one of the IDs.
*/
bool operator==(const LogID& id) const
{
if (id.pelID.id != 0)
{
return id.pelID.id == pelID.id;
}
if (id.obmcID.id != 0)
{
return id.obmcID.id == obmcID.id;
}
return false;
}
bool operator<(const LogID& id) const
{
return pelID.id < id.pelID.id;
}
};
Repository() = delete;
~Repository() = default;
Repository(const Repository&) = default;
Repository& operator=(const Repository&) = default;
Repository(Repository&&) = default;
Repository& operator=(Repository&&) = default;
/**
* @brief Constructor
*
* @param[in] basePath - the base filesystem path for the repository
*/
Repository(const std::filesystem::path& basePath);
/**
* @brief Adds a PEL to the repository
*
* Throws File.Error.Open or File.Error.Write exceptions on failure
*
* @param[in] pel - the PEL to add
*/
void add(std::unique_ptr<PEL>& pel);
/**
* @brief Removes a PEL from the repository
*
* @param[in] id - the ID (either the pel ID, OBMC ID, or both) to remove
*/
void remove(const LogID& id);
/**
* @brief Generates the filename to use for the PEL ID and BCDTime.
*
* @param[in] pelID - the PEL ID
* @param[in] time - the BCD time
*
* @return string - A filename string of <BCD_time>_<pelID>
*/
static std::string getPELFilename(uint32_t pelID, const BCDTime& time);
/**
* @brief Returns true if the PEL with the specified ID is in the repo.
*
* @param[in] id - the ID (either the pel ID, OBMC ID, or both)
* @return bool - true if that PEL is present
*/
inline bool hasPEL(const LogID& id)
{
return findPEL(id) != _pelAttributes.end();
}
/**
* @brief Returns the PEL data based on its ID.
*
* If the data can't be found for that ID, then the optional object
* will be empty.
*
* @param[in] id - the LogID to get the PEL for, which can be either a
* PEL ID or OpenBMC log ID.
* @return std::optional<std::vector<uint8_t>> - the PEL data
*/
std::optional<std::vector<uint8_t>> getPELData(const LogID& id);
/**
* @brief Get a file descriptor to the PEL data
*
* @param[in] id - The ID to get the FD for
*
* @return std::optional<sdbusplus::message::unix_fd> -
* The FD, or an empty optional object.
*/
std::optional<sdbusplus::message::unix_fd> getPELFD(const LogID& id);
using ForEachFunc = std::function<bool(const PEL&)>;
/**
* @brief Run a user defined function on every PEL in the repository.
*
* ForEachFunc takes a const PEL reference, and should return
* true to stop iterating and return out of for_each.
*
* For example, to save up to 100 IDs in the repo into a vector:
*
* std::vector<uint32_t> ids;
* ForEachFunc f = [&ids](const PEL& pel) {
* ids.push_back(pel.id());
* return ids.size() == 100 ? true : false;
* };
*
* @param[in] func - The function to run.
*/
void for_each(ForEachFunc func) const;
using AddCallback = std::function<void(const PEL&)>;
/**
* @brief Subscribe to PELs being added to the repository.
*
* Every time a PEL is added to the repository, the provided
* function will be called with the new PEL as the argument.
*
* The function must be of type void(const PEL&).
*
* @param[in] name - The subscription name
* @param[in] func - The callback function
*/
void subscribeToAdds(const std::string& name, AddCallback func)
{
if (_addSubscriptions.find(name) == _addSubscriptions.end())
{
_addSubscriptions.emplace(name, func);
}
}
/**
* @brief Unsubscribe from new PELs.
*
* @param[in] name - The subscription name
*/
void unsubscribeFromAdds(const std::string& name)
{
_addSubscriptions.erase(name);
}
using DeleteCallback = std::function<void(uint32_t)>;
/**
* @brief Subscribe to PELs being deleted from the repository.
*
* Every time a PEL is deleted from the repository, the provided
* function will be called with the PEL ID as the argument.
*
* The function must be of type void(const uint32_t).
*
* @param[in] name - The subscription name
* @param[in] func - The callback function
*/
void subscribeToDeletes(const std::string& name, DeleteCallback func)
{
if (_deleteSubscriptions.find(name) == _deleteSubscriptions.end())
{
_deleteSubscriptions.emplace(name, func);
}
}
/**
* @brief Unsubscribe from deleted PELs.
*
* @param[in] name - The subscription name
*/
void unsubscribeFromDeletes(const std::string& name)
{
_deleteSubscriptions.erase(name);
}
/**
* @brief Get the PEL attributes for a PEL
*
* @param[in] id - The ID to find the attributes for
*
* @return The attributes or an empty optional if not found
*/
std::optional<std::reference_wrapper<const PELAttributes>>
getPELAttributes(const LogID& id) const;
/**
* @brief Sets the host transmission state on a PEL file
*
* Writes the host transmission state field in the User Header
* section in the PEL data specified by the ID.
*
* @param[in] pelID - The PEL ID
* @param[in] state - The state to write
*/
void setPELHostTransState(uint32_t pelID, TransmissionState state);
/**
* @brief Sets the HMC transmission state on a PEL file
*
* Writes the HMC transmission state field in the User Header
* section in the PEL data specified by the ID.
*
* @param[in] pelID - The PEL ID
* @param[in] state - The state to write
*/
void setPELHMCTransState(uint32_t pelID, TransmissionState state);
private:
using PELUpdateFunc = std::function<void(PEL&)>;
/**
* @brief Lets a function modify a PEL and saves the results
*
* Runs updateFunc (a void(PEL&) function) on the PEL data
* on the file specified, and writes the results back to the file.
*
* @param[in] path - The file path to use
* @param[in] updateFunc - The function to run to update the PEL.
*/
void updatePEL(const std::filesystem::path& path, PELUpdateFunc updateFunc);
/**
* @brief Finds an entry in the _pelAttributes map.
*
* @param[in] id - the ID (either the pel ID, OBMC ID, or both)
*
* @return an iterator to the entry
*/
std::map<LogID, PELAttributes>::const_iterator
findPEL(const LogID& id) const
{
return std::find_if(_pelAttributes.begin(), _pelAttributes.end(),
[&id](const auto& a) { return a.first == id; });
}
/**
* @brief Call any subscribed functions for new PELs
*
* @param[in] pel - The new PEL
*/
void processAddCallbacks(const PEL& pel) const;
/**
* @brief Call any subscribed functions for deleted PELs
*
* @param[in] id - The ID of the deleted PEL
*/
void processDeleteCallbacks(uint32_t id) const;
/**
* @brief Restores the _pelAttributes map on startup based on the existing
* PEL data files.
*/
void restore();
/**
* @brief Stores a PEL object in the filesystem.
*
* @param[in] pel - The PEL to write
* @param[in] path - The file to write to
*
* Throws exceptions on failures.
*/
void write(const PEL& pel, const std::filesystem::path& path);
/**
* @brief The filesystem path to the PEL logs.
*/
const std::filesystem::path _logPath;
/**
* @brief A map of the PEL/OBMC IDs to PEL attributes.
*/
std::map<LogID, PELAttributes> _pelAttributes;
/**
* @brief Subcriptions for new PELs.
*/
std::map<std::string, AddCallback> _addSubscriptions;
/**
* @brief Subscriptions for deleted PELs.
*/
std::map<std::string, DeleteCallback> _deleteSubscriptions;
};
} // namespace pels
} // namespace openpower