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#include "abrtlib.h"
#include "KerneloopsScanner.h"
#include "DebugDump.h"
#include "ABRTException.h"
#include "CommLayerInner.h"
#include <assert.h>
#include <syslog.h>
#include <asm/unistd.h>
#define FILENAME_KERNELOOPS "kerneloops"
void CKerneloopsScanner::Run(const std::string& pActionDir,
const std::string& pArgs)
{
int cnt_FoundOopses;
/* Scan syslog file, on first call only */
if (!m_bSysLogFileScanned)
{
cnt_FoundOopses = ScanSysLogFile(m_sSysLogFile.c_str());
if (cnt_FoundOopses > 0) {
SaveOopsToDebugDump();
/*
* This marker in syslog file prevents us from
* re-parsing old oopses (any oops before it is
* ignored by ScanSysLogFile()). The only problem
* is that we can't be sure here that m_sSysLogFile
* is the file where syslog(xxx) stuff ends up.
*/
openlog("abrt", 0, LOG_KERN);
syslog(
LOG_WARNING,
"Kerneloops: Reported %u kernel oopses to Abrt",
cnt_FoundOopses
);
closelog();
}
m_bSysLogFileScanned = true;
}
/* Scan kernel's log buffer */
cnt_FoundOopses = ScanDmesg();
if (cnt_FoundOopses > 0)
SaveOopsToDebugDump();
}
void CKerneloopsScanner::SaveOopsToDebugDump()
{
comm_layer_inner_status("Creating kernel oops crash reports...");
time_t t = time(NULL);
CDebugDump debugDump;
std::list<COops> oopsList = m_pSysLog.GetOopsList();
m_pSysLog.ClearOopsList();
while (!oopsList.empty()) {
char path[PATH_MAX];
snprintf(path, sizeof(path), "%s/kerneloops-%lu-%lu",
DEBUG_DUMPS_DIR, (long)t, (long)oopsList.size());
COops oops = oopsList.back();
try
{
debugDump.Create(path, 0);
debugDump.SaveText(FILENAME_ANALYZER, "Kerneloops");
debugDump.SaveText(FILENAME_EXECUTABLE, "kernel");
debugDump.SaveText(FILENAME_KERNEL, oops.m_sVersion);
debugDump.SaveText(FILENAME_PACKAGE, "not_applicable");
debugDump.SaveText(FILENAME_KERNELOOPS, oops.m_sData);
debugDump.Close();
}
catch (CABRTException& e)
{
throw CABRTException(EXCEP_PLUGIN, std::string(__func__) + ": " + e.what());
}
oopsList.pop_back();
}
}
int CKerneloopsScanner::ScanDmesg()
{
comm_layer_inner_debug("Scanning dmesg...");
int cnt_FoundOopses;
char *buffer;
int pagesz = getpagesize();
buffer = (char*)xzalloc(pagesz + 1);
syscall(__NR_syslog, 3, buffer, pagesz);
cnt_FoundOopses = m_pSysLog.ExtractOops(buffer, strlen(buffer));
free(buffer);
return cnt_FoundOopses;
}
int CKerneloopsScanner::ScanSysLogFile(const char *filename)
{
comm_layer_inner_debug("Scanning syslog...");
char *buffer;
struct stat statb;
int fd;
int cnt_FoundOopses;
ssize_t sz;
fd = open(filename, O_RDONLY);
if (fd < 0)
return 0;
statb.st_size = 0; /* paranoia */
if (fstat(fd, &statb) != 0 || statb.st_size < 1)
return 0;
/*
* in theory there's a race here, since someone could spew
* to /var/log/messages before we read it in... we try to
* deal with it by reading at most 1023 bytes extra. If there's
* more than that.. any oops will be in dmesg anyway.
* Do not try to allocate an absurd amount of memory; ignore
* older log messages because they are unlikely to have
* sufficiently recent data to be useful. 32MB is more
* than enough; it's not worth looping through more log
* if the log is larger than that.
*/
sz = statb.st_size + 1024;
if (statb.st_size > (32*1024*1024 - 1024)) {
xlseek(fd, -(32*1024*1024 - 1024), SEEK_END);
sz = 32*1024*1024;
}
buffer = (char*)xzalloc(sz);
sz = full_read(fd, buffer, sz);
close(fd);
cnt_FoundOopses = 0;
if (sz > 0)
cnt_FoundOopses = m_pSysLog.ExtractOops(buffer, sz);
free(buffer);
return cnt_FoundOopses;
}
void CKerneloopsScanner::LoadSettings(const std::string& pPath)
{
map_plugin_settings_t settings;
plugin_load_settings(pPath, settings);
SetSettings(settings);
}
void CKerneloopsScanner::SetSettings(const map_plugin_settings_t& pSettings)
{
if (pSettings.find("SysLogFile") != pSettings.end())
{
m_sSysLogFile = pSettings.find("SysLogFile")->second;
}
}
map_plugin_settings_t CKerneloopsScanner::GetSettings()
{
map_plugin_settings_t ret;
ret["SysLogFile"] = m_sSysLogFile;
return ret;
}
PLUGIN_INFO(ACTION,
CKerneloopsScanner,
"KerneloopsScanner",
"0.0.1",
"Save new Kerneloops crashes into debug dump dir",
"anton@redhat.com",
"http://people.redhat.com/aarapov",
"");
/* for dumpoops tool */
extern "C" {
int scan_syslog_file(CKerneloopsScanner *This, const char *filename)
{
return This->ScanSysLogFile(filename);
}
void save_oops_to_debug_dump(CKerneloopsScanner *This)
{
This->SaveOopsToDebugDump();
}
}
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