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HDFS-16014: Fix an issue in checking native pmdk lib by 'hadoop checknative' command (#3762)

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PHILO-HE 2021-12-14 17:15:12 +08:00 committed by GitHub
parent d29f0e83a9
commit 8e08f43e03
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2 changed files with 13 additions and 4 deletions
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2
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/nativeio/NativeIO.java
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@ -141,7 +141,7 @@ public String getMessage() {
}
}
// Denotes the state of supporting PMDK. The value is set by JNI.
// Denotes the state of supporting PMDK. The actual value is set via JNI.
private static SupportState pmdkSupportState =
SupportState.UNSUPPORTED;

13
hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/nativeio/pmdk_load.c
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@ -35,13 +35,14 @@
#endif
PmdkLibLoader * pmdkLoader;
// 1 represents loaded. Otherwise, not loaded.
int pmdkLoaded;
/**
* pmdk_load.c
* Utility of loading the libpmem library and the required functions.
* Building of this codes won't rely on any libpmem source codes, but running
* into this will rely on successfully loading of the dynamic library.
*
*/
static const char* load_functions() {
@ -56,6 +57,10 @@ static const char* load_functions() {
return NULL;
}
/**
* It should be idempotent to call this function for checking
* whether PMDK lib is successfully loaded.
*/
void load_pmdk_lib(char* err, size_t err_len) {
const char* errMsg;
const char* library = NULL;
@ -67,10 +72,13 @@ void load_pmdk_lib(char* err, size_t err_len) {
err[0] = '\0';
if (pmdkLoader != NULL) {
if (pmdkLoaded == 1) {
return;
}
if (pmdkLoader == NULL) {
pmdkLoader = calloc(1, sizeof(PmdkLibLoader));
}
// Load PMDK library
#ifdef UNIX
@ -103,4 +111,5 @@ void load_pmdk_lib(char* err, size_t err_len) {
}
pmdkLoader->libname = strdup(library);
pmdkLoaded = 1;
}