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fix possible commit log init failure

This commit is contained in:
slguan 2019-08-01 11:36:47 +08:00
parent d6cfd14e8b
commit fbdeadbc23
1 changed files with 17 additions and 9 deletions
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26
src/system/src/vnodeCommit.c
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@ -28,10 +28,11 @@
#include "vnode.h"
typedef struct {
char action;
int sversion;
int sid;
int contLen;
int action:8;
int simpleCheck:24;
} SCommitHead;
int vnodeOpenCommitLog(int vnode, uint64_t firstV) {
@ -118,7 +119,7 @@ size_t vnodeRestoreDataFromLog(int vnode, char *fileName, uint64_t *firstV) {
fd = open(fileName, O_RDWR);
if (fd < 0) {
dError("vid:%d, failed to open:%s, reason:%s", vnode, fileName);
dError("vid:%d, failed to open:%s, reason:%s", vnode, fileName, strerror(errno));
goto _error;
}
@ -137,22 +138,26 @@ size_t vnodeRestoreDataFromLog(int vnode, char *fileName, uint64_t *firstV) {
}
SCommitHead head;
int simpleCheck = 0;
while (1) {
ret = read(fd, &head, sizeof(head));
if (ret < 0) goto _error;
if (ret == 0) break;
if (((head.sversion+head.sid+head.contLen+head.action) & 0xFFFFFF) != head.simpleCheck) break;
simpleCheck = head.simpleCheck;
// head.contLen validation is removed
if (head.sid >= pVnode->cfg.maxSessions || head.sid < 0 || head.action >= TSDB_ACTION_MAX) {
dError("vid, invalid commit head, sid:%d contLen:%d action:%d", head.sid, head.contLen, head.action);
} else {
if (head.contLen > 0) {
if (bufLen < head.contLen) { // pre-allocated buffer is not enough
cont = realloc(cont, head.contLen);
bufLen = head.contLen;
if (bufLen < head.contLen+sizeof(simpleCheck)) { // pre-allocated buffer is not enough
cont = realloc(cont, head.contLen+sizeof(simpleCheck));
bufLen = head.contLen+sizeof(simpleCheck);
}
if (read(fd, cont, head.contLen) < 0) goto _error;
if (read(fd, cont, head.contLen+sizeof(simpleCheck)) < 0) goto _error;
if (*(int *)(cont+head.contLen) != simpleCheck) break;
SMeterObj *pObj = pVnode->meterList[head.sid];
if (pObj == NULL) {
dError(
@ -171,7 +176,7 @@ size_t vnodeRestoreDataFromLog(int vnode, char *fileName, uint64_t *firstV) {
}
}
totalLen += sizeof(head) + head.contLen;
totalLen += sizeof(head) + head.contLen + sizeof(simpleCheck);
}
tclose(fd);
@ -253,19 +258,22 @@ int vnodeWriteToCommitLog(SMeterObj *pObj, char action, char *cont, int contLen,
head.action = action;
head.sversion = pObj->sversion;
head.contLen = contLen;
head.simpleCheck = (head.sversion+head.sid+head.contLen+head.action) & 0xFFFFFF;
int simpleCheck = head.simpleCheck;
pthread_mutex_lock(&(pVnode->logMutex));
// 100 bytes redundant mem space
if (pVnode->mappingSize - (pVnode->pWrite - pVnode->pMem) < contLen + sizeof(SCommitHead) + 100) {
if (pVnode->mappingSize - (pVnode->pWrite - pVnode->pMem) < contLen + sizeof(SCommitHead) + sizeof(simpleCheck) + 100) {
pthread_mutex_unlock(&(pVnode->logMutex));
dTrace("vid:%d, mem mapping space is not enough, wait for commit", pObj->vnode);
vnodeProcessCommitTimer(pVnode, NULL);
return TSDB_CODE_ACTION_IN_PROGRESS;
}
char *pWrite = pVnode->pWrite;
pVnode->pWrite += sizeof(head) + contLen;
pVnode->pWrite += sizeof(head) + contLen + sizeof(simpleCheck);
memcpy(pWrite, (char *)&head, sizeof(head));
memcpy(pWrite + sizeof(head), cont, contLen);
memcpy(pWrite + sizeof(head) + contLen, &simpleCheck, sizeof(simpleCheck));
pthread_mutex_unlock(&(pVnode->logMutex));
if (pVnode->pWrite - pVnode->pMem > pVnode->mappingThreshold) {