fix: 修复mqueue问题

【背景】
1.mqueue用例关于NFILE错误码压力测试中，不符合预期结果
2.mq_unlink对于fork出的mqueue不起效
3.已打开的mqueue，在fork后两进程共用一份mqpersonal不合理
【修改方案】
1. 确认是内核关于mqueue的fd_set定义位置不合理导致的，
将fd_set定义位置由mqarray结构体调未全局变量后，问题解决
2.不合理的unlink_ref++导致的，去除相关操作，使用mq_personal
链表判断何时需要删除
3.fork时内核复制一份mqpersonal
【影响】
对现有的产品编译不会有影响。

re #I43P4T

Signed-off-by: lanleinan <lanleinan@163.com>
Change-Id: I09f183cc3a88e5a65201dbc1fc4f4806f78971be

compat/posix/include/mqueue.h

@@ -95,7 +95,6 @@ struct mqarray {
     mode_s mode_data; /* mode data of mqueue */
     uid_t euid; /* euid of mqueue */
     gid_t egid; /* egid of mqueue */
-    fd_set mq_fdset; /* mqueue sysFd bit map */
     struct mqnotify mq_notify;
     LosQueueCB *mqcb;
     struct mqpersonal *mq_personal;
@@ -423,7 +422,7 @@ extern int mq_timedsend(mqd_t personal, const char *msg, size_t msgLen,
 extern ssize_t mq_timedreceive(mqd_t personal, char *msg, size_t msgLen,
                                unsigned int *msgPrio, const struct timespec *absTimeout);
 
-extern void mqueue_refer(int sysFd);
+extern void MqueueRefer(int sysFd);
 extern int OsMqNotify(mqd_t personal, const struct sigevent *sigev);
 
 #ifdef __cplusplus

compat/posix/src/mqueue.c

@@ -49,6 +49,7 @@
 #endif
 
 /* GLOBALS */
+STATIC fd_set g_queueFdSet;
 STATIC struct mqarray g_queueTable[LOSCFG_BASE_IPC_QUEUE_LIMIT];
 STATIC pthread_mutex_t g_mqueueMutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
 STATIC struct mqpersonal *g_mqPrivBuf[MAX_MQ_FD];
@@ -247,6 +248,44 @@ ERROUT:
     return (struct mqpersonal *)-1;
 }
 
+STATIC INT32 DoMqueueClose(struct mqpersonal *privateMqPersonal)
+{
+    struct mqarray *mqueueCB = NULL;
+    struct mqpersonal *tmp = NULL;
+
+    mqueueCB = privateMqPersonal->mq_posixdes;
+    if (mqueueCB == NULL || mqueueCB->mq_personal == NULL) {
+        errno = EBADF;
+        return LOS_NOK;
+    }
+
+    /* find the personal and remove */
+    if (mqueueCB->mq_personal == privateMqPersonal) {
+        mqueueCB->mq_personal = privateMqPersonal->mq_next;
+    } else {
+        for (tmp = mqueueCB->mq_personal; tmp->mq_next != NULL; tmp = tmp->mq_next) {
+            if (tmp->mq_next == privateMqPersonal) {
+                break;
+            }
+        }
+        if (tmp->mq_next == NULL) {
+            errno = EBADF;
+            return LOS_NOK;
+        }
+        tmp->mq_next = privateMqPersonal->mq_next;
+    }
+    /* flag no use */
+    privateMqPersonal->mq_status = 0;
+
+    /* free the personal */
+    (VOID)LOS_MemFree(OS_SYS_MEM_ADDR, privateMqPersonal);
+
+    if ((mqueueCB->unlinkflag == TRUE) && (mqueueCB->mq_personal == NULL)) {
+        return DoMqueueDelete(mqueueCB);
+    }
+    return LOS_OK;
+}
+
 /* Translate a sysFd into privateMqPersonal */
 STATIC struct mqpersonal *MqGetPrivDataBuff(mqd_t personal)
 {
@@ -272,29 +311,24 @@ STATIC struct mqpersonal *MqGetPrivDataBuff(mqd_t personal)
 STATIC INT32 MqAllocSysFd(int maxfdp, struct mqpersonal *privateMqPersonal)
 {
     INT32 i;
-    struct mqarray *mqueueCB = privateMqPersonal->mq_posixdes;
+    fd_set *fdset = &g_queueFdSet;
-    fd_set *fdset = &mqueueCB->mq_fdset;
     for (i = 0; i < maxfdp; i++) {
         /* sysFd: used bit setting, and get the index of swtmrID buffer */
-        if (!(fdset && FD_ISSET(i + MQUEUE_FD_OFFSET, fdset))) {
+        if (fdset && !(FD_ISSET(i + MQUEUE_FD_OFFSET, fdset))) {
             FD_SET(i + MQUEUE_FD_OFFSET, fdset);
             if (!g_mqPrivBuf[i]) {
-                g_mqPrivBuf[i] = mqueueCB->mq_personal;
+                g_mqPrivBuf[i] = privateMqPersonal;
                 return i + MQUEUE_FD_OFFSET;
             }
         }
     }
-    /* there are no more mq sysFd to use, free the personal */
-    LOS_MemFree(OS_SYS_MEM_ADDR, privateMqPersonal);
-    privateMqPersonal = NULL;
-    mqueueCB->mq_personal = NULL;
     return -1;
 }
 
-STATIC VOID MqFreeSysFd(struct mqarray *mqueueCB, mqd_t personal)
+STATIC VOID MqFreeSysFd(mqd_t personal)
 {
     INT32 sysFd = (INT32)personal;
-    fd_set *fdset = &mqueueCB->mq_fdset;
+    fd_set *fdset = &g_queueFdSet;
     if (fdset && FD_ISSET(sysFd, fdset)) {
         FD_CLR(sysFd, fdset);
         g_mqPrivBuf[sysFd - MQUEUE_FD_OFFSET] = NULL;
@@ -302,7 +336,7 @@ STATIC VOID MqFreeSysFd(struct mqarray *mqueueCB, mqd_t personal)
 }
 
 /* Mqueue fd reference count */
-void mqueue_refer(int sysFd)
+void MqueueRefer(int sysFd)
 {
     struct mqarray *mqueueCB = NULL;
     struct mqpersonal *privateMqPersonal = NULL;
@@ -317,10 +351,11 @@ void mqueue_refer(int sysFd)
     if (mqueueCB == NULL) {
         goto OUT_UNLOCK;
     }
+
     privateMqPersonal->mq_refcount++;
-    mqueueCB->unlink_ref++;
 OUT_UNLOCK:
     (VOID)pthread_mutex_unlock(&g_mqueueMutex);
+    return;
 }
 
 STATIC INT32 MqTryClose(struct mqpersonal *privateMqPersonal)
@@ -339,15 +374,6 @@ STATIC INT32 MqTryClose(struct mqpersonal *privateMqPersonal)
     return FALSE;
 }
 
-STATIC INT32 MqTryUnlink(struct mqarray *mqueueCB)
-{
-    if (mqueueCB->unlink_ref == 0) {
-        return TRUE;
-    }
-    mqueueCB->unlink_ref--;
-    return FALSE;
-}
-
 /* Set the mode data bit,for consumer's mode comparing. */
 STATIC INT32 MqueueModeAnalysisSet(struct mqpersonal *privateMqPersonal)
 {
@@ -494,6 +520,9 @@ mqd_t mq_open(const char *mqName, int openFlag, ...)
         }
         /* Set mode data bit ,just for the first node */
         if (MqueueModeAnalysisSet(privateMqPersonal)) {
+            if ((INT32)(UINTPTR)privateMqPersonal > 0) {
+                (VOID)DoMqueueClose(privateMqPersonal);
+            }
             goto OUT;
         }
     } else {
@@ -502,15 +531,18 @@ mqd_t mq_open(const char *mqName, int openFlag, ...)
         }
         privateMqPersonal = DoMqueueOpen(mqueueCB, openFlag);
     }
-OUT:
+
     if ((INT32)(UINTPTR)privateMqPersonal > 0) {
         /* alloc sysFd */
         sysFd = MqAllocSysFd(MAX_MQ_FD, privateMqPersonal);
         if (sysFd == -1) {
+            /* there are no more mq sysFd to use, close the personal */
+            (VOID)DoMqueueClose(privateMqPersonal);
             errno = ENFILE;
         }
         mqFd = (mqd_t)sysFd;
     }
+OUT:
     (VOID)pthread_mutex_unlock(&g_mqueueMutex);
     return mqFd;
 }
@@ -518,9 +550,7 @@ OUT:
 int mq_close(mqd_t personal)
 {
     INT32 ret = -1;
-    struct mqarray *mqueueCB = NULL;
     struct mqpersonal *privateMqPersonal = NULL;
-    struct mqpersonal *tmp = NULL;
 
     (VOID)pthread_mutex_lock(&g_mqueueMutex);
 
@@ -534,47 +564,18 @@ int mq_close(mqd_t personal)
         errno = EBADF;
         goto OUT_UNLOCK;
     }
-    /* there have other thread used the fd */
+
     if (!MqTryClose(privateMqPersonal)) {
         ret = 0;
         goto OUT_UNLOCK;
     }
-    mqueueCB = privateMqPersonal->mq_posixdes;
+
-    if (mqueueCB->mq_personal == NULL) {
+    ret = DoMqueueClose(privateMqPersonal);
-        errno = EBADF;
+    if (ret < 0) {
         goto OUT_UNLOCK;
     }
+    MqFreeSysFd(personal);
 
-    /* find the personal and remove */
-    if (mqueueCB->mq_personal == privateMqPersonal) {
-        mqueueCB->mq_personal = privateMqPersonal->mq_next;
-    } else {
-        for (tmp = mqueueCB->mq_personal; tmp->mq_next != NULL; tmp = tmp->mq_next) {
-            if (tmp->mq_next == privateMqPersonal) {
-                break;
-            }
-        }
-        if (tmp->mq_next == NULL) {
-            errno = EBADF;
-            goto OUT_UNLOCK;
-        }
-        tmp->mq_next = privateMqPersonal->mq_next;
-    }
-    /* flag no use */
-    privateMqPersonal->mq_status = 0;
-    MqFreeSysFd(mqueueCB, personal);
-
-    /* free the personal */
-    ret = LOS_MemFree(OS_SYS_MEM_ADDR, privateMqPersonal);
-    if (ret != LOS_OK) {
-        errno = EFAULT;
-        ret = -1;
-        goto OUT_UNLOCK;
-    }
-
-    if ((mqueueCB->unlinkflag == TRUE) && (mqueueCB->mq_personal == NULL)) {
-        ret = DoMqueueDelete(mqueueCB);
-    }
 OUT_UNLOCK:
     (VOID)pthread_mutex_unlock(&g_mqueueMutex);
     return ret;
@@ -667,10 +668,7 @@ int mq_unlink(const char *mqName)
         errno = ENOENT;
         goto ERROUT_UNLOCK;
     }
-    if (!MqTryUnlink(mqueueCB)) {
+
-        (VOID)pthread_mutex_unlock(&g_mqueueMutex);
-        return 0;
-    }
     if (mqueueCB->mq_personal != NULL) {
         mqueueCB->unlinkflag = TRUE;
     } else if (mqueueCB->unlink_ref == 0) {

fs/vfs/operation/fs_file.c

@@ -317,7 +317,7 @@ static void FdRefer(int sysFd)
 #endif
 #if defined(LOSCFG_COMPAT_POSIX)
     if ((sysFd >= MQUEUE_FD_OFFSET) && (sysFd < (MQUEUE_FD_OFFSET + CONFIG_NQUEUE_DESCRIPTORS))) {
-        mqueue_refer(sysFd);
+        MqueueRefer(sysFd);
     }
 #endif
 }