fix: 修复获取容器信息失败

Signed-off-by: Nzhushengle <zhushengle@huawei.com>
Change-Id: Ie612d14337f7c24812c74f1510c0a8e6fca1c200

fs/proc/os_adapt/process_proc.c

@@ -103,6 +103,8 @@ static ssize_t ProcessContainerLink(unsigned int containerID, ContainerType type
 
 static ssize_t ProcessContainerReadLink(struct ProcDirEntry *entry, char *buffer, size_t bufLen)
 {
+    char *freeBuf = NULL;
+    char *buf = buffer;
     ssize_t count;
     unsigned int intSave;
     if (entry == NULL) {
@@ -112,17 +114,41 @@ static ssize_t ProcessContainerReadLink(struct ProcDirEntry *entry, char *buffer
     if (data == NULL) {
         return -EINVAL;
     }
+
+    if (LOS_IsUserAddressRange((VADDR_T)(UINTPTR)buffer, bufLen)) {
+        buf = LOS_MemAlloc(m_aucSysMem1, bufLen);
+        if (buf == NULL) {
+            return -ENOMEM;
+        }
+        (void)memset_s(buf, bufLen, 0, bufLen);
+        freeBuf = buf;
+    }
+
     LosProcessCB *processCB = ProcGetProcessCB(data);
     SCHEDULER_LOCK(intSave);
     UINT32 containerID = OsGetContainerID(processCB, (ContainerType)data->type);
     SCHEDULER_UNLOCK(intSave);
     if (containerID != OS_INVALID_VALUE) {
-        return ProcessContainerLink(containerID, (ContainerType)data->type, buffer, bufLen);
+        count = ProcessContainerLink(containerID, (ContainerType)data->type, buf, bufLen);
+    } else {
+        count = strlen("(unknown)");
+        if (memcpy_s(buf, bufLen, "(unknown)", count + 1) != EOK) {
+            (void)LOS_MemFree(m_aucSysMem1, freeBuf);
+            return -EBADF;
+        }
     }
-    count = strlen("(unknown)");
-    if (memcpy_s(buffer, bufLen, "(unknown)", count + 1) != EOK) {
-        return -EBADF;
+    if (count < 0) {
+        (void)LOS_MemFree(m_aucSysMem1, freeBuf);
+        return count;
+    }
+
+    if (LOS_IsUserAddressRange((VADDR_T)(UINTPTR)buffer, bufLen)) {
+        if (LOS_ArchCopyToUser(buffer, buf, bufLen) != 0) {
+            (void)LOS_MemFree(m_aucSysMem1, freeBuf);
+            return -EFAULT;
+        }
     }
+    (void)LOS_MemFree(m_aucSysMem1, freeBuf);
     return count;
 }
 

fs/vfs/vnode.c

@@ -138,7 +138,7 @@ int VnodeAlloc(struct VnodeOps *vop, struct Vnode **newVnode)
     VnodeHold();
     vnode = GetFromFreeList();
     if ((vnode == NULL) && g_totalVnodeSize < LOSCFG_MAX_VNODE_SIZE) {
-        vnode = (struct Vnode*)zalloc(sizeof(struct Vnode));
+        vnode = (struct Vnode *)zalloc(sizeof(struct Vnode));
         g_totalVnodeSize++;
     }
 

syscall/fs_syscall.c

@@ -321,7 +321,7 @@ static unsigned int ProcRealProcessIDGet(unsigned int pid)
 
     SCHEDULER_LOCK(intSave);
     LosProcessCB *pcb = OsGetPCBFromVpid(pid);
-    if (pcb == NULL) {
+    if (OsProcessIsInactive(pcb)) {
         SCHEDULER_UNLOCK(intSave);
         return 0;
     }

testsuites/unittest/process/fs/smoke/It_process_fs_013.cpp

@@ -30,19 +30,13 @@
 #include <gtest/gtest.h>
 #include "It_process_fs_test.h"
 
-static const int ini_process_max = 3;
-
 void ItProcessFs013(void)
 {
     std::string path;
     DIR *dirp = nullptr;
-    for (int i = 1; i <= ini_process_max; i++) {
-        if (i != 2) { /* 2: skip kernel process */
-            path = GenProcPidPath(i);
-            printf("path: %s\n", path.c_str());
-            dirp = opendir(path.data());
-            ASSERT_NE(dirp, nullptr);
-            (void)closedir(dirp);
-        };
-    }
+    path = GenProcPidPath(1);
+    printf("path: %s\n", path.c_str());
+    dirp = opendir(path.data());
+    ASSERT_NE(dirp, nullptr);
+    (void)closedir(dirp);
 }