sync update dfs v2. (#8336)

9 files changed, 399 insertions, 87 deletions

diff --git a/components/dfs/dfs_v2/filesystems/devfs/devfs.c b/components/dfs/dfs_v2/filesystems/devfs/devfs.c
index 713ca49db7..b2e75d06d8 100644
--- a/components/dfs/dfs_v2/filesystems/devfs/devfs.c
+++ b/components/dfs/dfs_v2/filesystems/devfs/devfs.c
@@ -36,6 +36,12 @@ ssize_t dfs_devfs_write(struct dfs_file *file, const void *buf, size_t count, of
 int dfs_devfs_ioctl(struct dfs_file *file, int cmd, void *args);
 int dfs_devfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count);
 static int dfs_devfs_poll(struct dfs_file *file, struct rt_pollreq *req);
+int dfs_devfs_flush(struct dfs_file *file);
+off_t dfs_devfs_lseek(struct dfs_file *file, off_t offset, int wherece);
+int dfs_devfs_truncate(struct dfs_file *file, off_t offset);
+int dfs_devfs_mmap(struct dfs_file *file, struct lwp_avl_struct *mmap);
+int dfs_devfs_lock(struct dfs_file *file, struct file_lock *flock);
+int dfs_devfs_flock(struct dfs_file *file, int operation, struct file_lock *flock);
 
 int dfs_devfs_mount(struct dfs_mnt *mnt, unsigned long rwflag, const void *data);
 int dfs_devfs_umount(struct dfs_mnt *mnt);
@@ -48,14 +54,21 @@ static int dfs_devfs_free_vnode(struct dfs_vnode *vnode);
 
 static const struct dfs_file_ops _dev_fops =
 {
-    .open = dfs_devfs_open,
-    .close = dfs_devfs_close,
-    .lseek = generic_dfs_lseek,
-    .read = dfs_devfs_read,
-    .write = dfs_devfs_write,
-    .ioctl = dfs_devfs_ioctl,
-    .getdents = dfs_devfs_getdents,
-    .poll = dfs_devfs_poll,
+    .open       = dfs_devfs_open,
+    .close      = dfs_devfs_close,
+    .lseek      = generic_dfs_lseek,
+    .read       = dfs_devfs_read,
+    .write      = dfs_devfs_write,
+    .ioctl      = dfs_devfs_ioctl,
+    .getdents   = dfs_devfs_getdents,
+    .poll       = dfs_devfs_poll,
+
+    .flush      = dfs_devfs_flush,
+    .lseek      = dfs_devfs_lseek,
+    .truncate   = dfs_devfs_truncate,
+    .mmap       = dfs_devfs_mmap,
+    .lock       = dfs_devfs_lock,
+    .flock      = dfs_devfs_flock,
 };
 
 static const struct dfs_filesystem_ops _devfs_ops =
@@ -175,14 +188,7 @@ static struct dfs_vnode *dfs_devfs_lookup(struct dfs_dentry *dentry)
                 vnode->mode = _device_to_mode(device);
                 vnode->size = device->ref_count;
                 vnode->nlink = 1;
-                if (device->fops)
-                {
-                    vnode->fops = device->fops;
-                }
-                else
-                {
-                    vnode->fops = &_dev_fops;
-                }
+                vnode->fops = &_dev_fops;
                 vnode->data = device;
                 vnode->mnt = dentry->mnt;
                 vnode->type = FT_DEVICE;
@@ -259,64 +265,94 @@ int dfs_devfs_statfs(struct dfs_mnt *mnt, struct statfs *buf)
 
 int dfs_devfs_ioctl(struct dfs_file *file, int cmd, void *args)
 {
-    rt_err_t result;
-    rt_device_t dev_id;
+    rt_err_t result = RT_EOK;
+    rt_device_t device;
 
     RT_ASSERT(file != RT_NULL);
 
     /* get device handler */
-    dev_id = (rt_device_t)file->vnode->data;
-    RT_ASSERT(dev_id != RT_NULL);
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
 
     if ((file->dentry->pathname[0] == '/') && (file->dentry->pathname[1] == '\0'))
         return -RT_ENOSYS;
 
-    /* close device handler */
-    result = rt_device_control(dev_id, cmd, args);
-    if (result == RT_EOK)
-        return RT_EOK;
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->ioctl)
+    {
+        result = device->fops->ioctl(file, cmd, args);
+    }
+    else if (device->ops)
+#else
+    if (device->ops)
+#endif /* RT_USING_POSIX_DEVIO */
+    {
+        result = rt_device_control(device, cmd, args);
+    }
 
     return result;
 }
 
 ssize_t dfs_devfs_read(struct dfs_file *file, void *buf, size_t count, off_t *pos)
 {
-    int result;
-    rt_device_t dev_id;
+    int result = -RT_EIO;
+    rt_device_t device;
 
     RT_ASSERT(file != RT_NULL);
 
     /* get device handler */
-    dev_id = (rt_device_t)file->vnode->data;
-    RT_ASSERT(dev_id != RT_NULL);
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
 
     if ((file->dentry->pathname[0] == '/') && (file->dentry->pathname[1] == '\0'))
         return -RT_ENOSYS;
 
-    /* read device data */
-    result = rt_device_read(dev_id, *pos, buf, count);
-    *pos += result;
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->read)
+    {
+        result = device->fops->read(file, buf, count, pos);
+    }
+    else if (device->ops)
+#else
+    if (device->ops)
+#endif /* RT_USING_POSIX_DEVIO */
+    {
+        /* read device data */
+        result = rt_device_read(device, *pos, buf, count);
+        *pos += result;
+    }
 
     return result;
 }
 
 ssize_t dfs_devfs_write(struct dfs_file *file, const void *buf, size_t count, off_t *pos)
 {
-    int result;
-    rt_device_t dev_id;
+    int result = -RT_EIO;
+    rt_device_t device;
 
     RT_ASSERT(file != RT_NULL);
 
     /* get device handler */
-    dev_id = (rt_device_t)file->vnode->data;
-    RT_ASSERT(dev_id != RT_NULL);
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
 
     if ((file->dentry->pathname[0] == '/') && (file->dentry->pathname[1] == '\0'))
         return -RT_ENOSYS;
 
-    /* read device data */
-    result = rt_device_write(dev_id, *pos, buf, count);
-    *pos += result;
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->write)
+    {
+        result = device->fops->write(file, buf, count, pos);
+    }
+    else if (device->ops)
+#else
+    if (device->ops)
+#endif /* RT_USING_POSIX_DEVIO */
+    {
+        /* read device data */
+        result = rt_device_write(device, *pos, buf, count);
+        *pos += result;
+    }
 
     return result;
 }
@@ -334,8 +370,19 @@ int dfs_devfs_close(struct dfs_file *file)
         device = (rt_device_t)file->vnode->data;
         RT_ASSERT(device != RT_NULL);
 
-        /* close device handler */
-        result = rt_device_close(device);
+#ifdef RT_USING_POSIX_DEVIO
+        if (device->fops && device->fops->close)
+        {
+            result = device->fops->close(file);
+        }
+        else if (device->ops)
+#else
+        if (device->ops)
+#endif /* RT_USING_POSIX_DEVIO */
+        {
+            /* close device handler */
+            result = rt_device_close(device);
+        }
     }
 
     return result;
@@ -361,21 +408,18 @@ int dfs_devfs_open(struct dfs_file *file)
         if (device)
         {
 #ifdef RT_USING_POSIX_DEVIO
-            if (device->fops)
+            if (device->fops && device->fops->open)
             {
-                /* use device fops */
-                file->fops = device->fops;
-                /* use fops->open */
-                if (file->vnode->fops->open)
+                result = device->fops->open(file);
+                if (result == RT_EOK || result == -RT_ENOSYS)
                 {
-                    result = file->vnode->fops->open(file);
-                    if (result == RT_EOK || result == -RT_ENOSYS)
-                    {
-                        return RT_EOK;
-                    }
+                    file->fops = &_dev_fops;
+                    return RT_EOK;
                 }
             }
-            else
+            else if (device->ops)
+#else
+            if (device->ops)
 #endif /* RT_USING_POSIX_DEVIO */
             {
                 result = rt_device_open(device, RT_DEVICE_OFLAG_RDWR);
@@ -395,18 +439,18 @@ int dfs_devfs_open(struct dfs_file *file)
 int dfs_devfs_unlink(struct dfs_dentry *dentry)
 {
 #ifdef RT_USING_DEV_BUS
-    rt_device_t dev_id;
+    rt_device_t device;
 
-    dev_id = rt_device_find(&dentry->pathname[1]);
-    if (dev_id == RT_NULL)
+    device = rt_device_find(&dentry->pathname[1]);
+    if (device == RT_NULL)
     {
         return -1;
     }
-    if (dev_id->type != RT_Device_Class_Bus)
+    if (device->type != RT_Device_Class_Bus)
     {
         return -1;
     }
-    rt_device_bus_destroy(dev_id);
+    rt_device_bus_destroy(device);
 #endif
     return RT_EOK;
 }
@@ -441,10 +485,10 @@ int dfs_devfs_stat(struct dfs_dentry *dentry, struct stat *st)
         }
         else
         {
-            rt_device_t dev_id;
+            rt_device_t device;
 
-            dev_id = rt_device_find(&path[1]);
-            if (dev_id != RT_NULL)
+            device = rt_device_find(&path[1]);
+            if (device != RT_NULL)
             {
                 st->st_dev = 0;
                 st->st_gid = vnode->gid;
@@ -505,10 +549,136 @@ int dfs_devfs_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t coun
 static int dfs_devfs_poll(struct dfs_file *file, struct rt_pollreq *req)
 {
     int mask = 0;
+    rt_device_t device;
+
+    /* get device handler */
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
+
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->poll)
+    {
+        mask = device->fops->poll(file, req);
+    }
+#endif /* RT_USING_POSIX_DEVIO */
 
     return mask;
 }
 
+int dfs_devfs_flush(struct dfs_file *file)
+{
+    int ret = 0;
+    rt_device_t device;
+
+    /* get device handler */
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
+
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->flush)
+    {
+        ret = device->fops->flush(file);
+    }
+#endif /* RT_USING_POSIX_DEVIO */
+
+    return ret;
+}
+
+off_t dfs_devfs_lseek(struct dfs_file *file, off_t offset, int wherece)
+{
+    off_t ret = 0;
+    rt_device_t device;
+
+    /* get device handler */
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
+
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->lseek)
+    {
+        ret = device->fops->lseek(file, offset, wherece);
+    }
+#endif /* RT_USING_POSIX_DEVIO */
+
+    return ret;
+}
+
+int dfs_devfs_truncate(struct dfs_file *file, off_t offset)
+{
+    int ret = 0;
+    rt_device_t device;
+
+    /* get device handler */
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
+
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->truncate)
+    {
+        ret = device->fops->truncate(file, offset);
+    }
+#endif /* RT_USING_POSIX_DEVIO */
+
+    return ret;
+}
+
+int dfs_devfs_mmap(struct dfs_file *file, struct lwp_avl_struct *mmap)
+{
+    int ret = 0;
+    rt_device_t device;
+
+    /* get device handler */
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
+
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->mmap)
+    {
+        ret = device->fops->mmap(file, mmap);
+    }
+#endif /* RT_USING_POSIX_DEVIO */
+
+    return ret;
+}
+
+int dfs_devfs_lock(struct dfs_file *file, struct file_lock *flock)
+{
+    int ret = 0;
+    rt_device_t device;
+
+    /* get device handler */
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
+
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->lock)
+    {
+        ret = device->fops->lock(file, flock);
+    }
+#endif /* RT_USING_POSIX_DEVIO */
+
+    return ret;
+}
+
+int dfs_devfs_flock(struct dfs_file *file, int operation, struct file_lock *flock)
+{
+    int ret = 0;
+    rt_device_t device;
+
+    /* get device handler */
+    device = (rt_device_t)file->vnode->data;
+    RT_ASSERT(device != RT_NULL);
+
+#ifdef RT_USING_POSIX_DEVIO
+    if (device->fops && device->fops->flock)
+    {
+        ret = device->fops->flock(file, operation, flock);
+    }
+#endif /* RT_USING_POSIX_DEVIO */
+
+    return ret;
+}
+
 int dfs_devfs_init(void)
 {
     /* register devfs file system */
diff --git a/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c b/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c
index 5ea5140fc1..c8d41f02f7 100644
--- a/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c
+++ b/components/dfs/dfs_v2/filesystems/elmfat/dfs_elm.c
@@ -38,6 +38,7 @@
 
 
 static int dfs_elm_free_vnode(struct dfs_vnode *vnode);
+static int dfs_elm_truncate(struct dfs_file *file, off_t offset);
 
 #ifdef RT_USING_PAGECACHE
 static ssize_t dfs_elm_page_read(struct dfs_file *file, struct dfs_page *page);
@@ -547,33 +548,14 @@ int dfs_elm_ioctl(struct dfs_file *file, int cmd, void *args)
     switch (cmd)
     {
     case RT_FIOFTRUNCATE:
-        {
-            FIL *fd;
-            FSIZE_t fptr, length;
-            FRESULT result = FR_OK;
-            fd = (FIL *)(file->vnode->data);
-            RT_ASSERT(fd != RT_NULL);
-
-            /* save file read/write point */
-            fptr = fd->fptr;
-            length = *(off_t*)args;
-            if (length <= fd->obj.objsize)
-            {
-                fd->fptr = length;
-                result = f_truncate(fd);
-            }
-            else
-            {
-                result = f_lseek(fd, length);
-            }
-            /* restore file read/write point */
-            fd->fptr = fptr;
-            return elm_result_to_dfs(result);
-        }
+    {
+        off_t offset = (off_t)(size_t)(args);
+        return dfs_elm_truncate(file, offset);
+    }
     case F_GETLK:
-            return 0;
+        return 0;
     case F_SETLK:
-            return 0;
+        return 0;
     }
     return -ENOSYS;
 }
@@ -701,6 +683,30 @@ off_t dfs_elm_lseek(struct dfs_file *file, off_t offset, int wherece)
     return elm_result_to_dfs(result);
 }
 
+static int dfs_elm_truncate(struct dfs_file *file, off_t offset)
+{
+    FIL *fd;
+    FSIZE_t fptr;
+    FRESULT result = FR_OK;
+    fd = (FIL *)(file->vnode->data);
+    RT_ASSERT(fd != RT_NULL);
+
+    /* save file read/write point */
+    fptr = fd->fptr;
+    if (offset <= fd->obj.objsize)
+    {
+        fd->fptr = offset;
+        result = f_truncate(fd);
+    }
+    else
+    {
+        result = f_lseek(fd, offset);
+    }
+    /* restore file read/write point */
+    fd->fptr = fptr;
+    return elm_result_to_dfs(result);
+}
+
 int dfs_elm_getdents(struct dfs_file *file, struct dirent *dirp, uint32_t count)
 {
     DIR *dir;
@@ -1065,6 +1071,7 @@ static const struct dfs_file_ops dfs_elm_fops =
     .write = dfs_elm_write,
     .flush = dfs_elm_flush,
     .lseek = dfs_elm_lseek,
+    .truncate = dfs_elm_truncate,
     .getdents = dfs_elm_getdents,
 };
 
diff --git a/components/dfs/dfs_v2/include/dfs.h b/components/dfs/dfs_v2/include/dfs.h
index aa3bd84f27..d68f2d222c 100644
--- a/components/dfs/dfs_v2/include/dfs.h
+++ b/components/dfs/dfs_v2/include/dfs.h
@@ -109,6 +109,9 @@ void dfs_unlock(void);
 rt_err_t dfs_file_lock(void);
 void dfs_file_unlock(void);
 
+int dfs_fdtable_dup(struct dfs_fdtable *fdt_dst, struct dfs_fdtable *fdt_src, int fd_src);
+int dfs_fdtable_drop_fd(struct dfs_fdtable *fdtab, int fd);
+
 #ifdef DFS_USING_POSIX
 /* FD APIs */
 int fdt_fd_new(struct dfs_fdtable *fdt);
diff --git a/components/dfs/dfs_v2/include/dfs_file.h b/components/dfs/dfs_v2/include/dfs_file.h
index 17027d93b2..9a47198e4d 100644
--- a/components/dfs/dfs_v2/include/dfs_file.h
+++ b/components/dfs/dfs_v2/include/dfs_file.h
@@ -181,6 +181,8 @@ int dfs_file_mmap2(struct dfs_file *file, struct dfs_mmap2_args *mmap2);
 int dfs_file_mmap(struct dfs_file *file, struct dfs_mmap2_args *mmap2);
 #endif
 
+char *dfs_nolink_path(struct dfs_mnt **mnt, char *fullpath, int mode);
+
 /* 0x5254 is just a magic number to make these relatively unique ("RT") */
 #define RT_FIOFTRUNCATE  0x52540000U
 #define RT_FIOGETADDR    0x52540001U
diff --git a/components/dfs/dfs_v2/src/dfs.c b/components/dfs/dfs_v2/src/dfs.c
index 06d353c180..e442421d16 100644
--- a/components/dfs/dfs_v2/src/dfs.c
+++ b/components/dfs/dfs_v2/src/dfs.c
@@ -421,6 +421,99 @@ struct dfs_fdtable *dfs_fdtable_get_global(void)
     return &_fdtab;
 }
 
+
+/**
+ * @brief  Dup the specified fd_src from fdt_src to fdt_dst.
+ *
+ * @param  fdt_dst is the fd table for destination, if empty, use global (_fdtab).
+ *
+ * @param  fdt_src is the fd table for source, if empty, use global (_fdtab).
+ *
+ * @param  fd_src is the fd in the designate fdt_src table.
+ *
+ * @return -1 on failed or the allocated file descriptor.
+ */
+int dfs_fdtable_dup(struct dfs_fdtable *fdt_dst, struct dfs_fdtable *fdt_src, int fd_src)
+{
+    int newfd = -1;
+
+    dfs_file_lock();
+
+    if (fdt_src == NULL)
+    {
+        fdt_src = &_fdtab;
+    }
+
+    if (fdt_dst == NULL)
+    {
+        fdt_dst = &_fdtab;
+    }
+
+    /* check fd */
+    if ((fd_src < 0) || (fd_src >= fdt_src->maxfd))
+    {
+        goto _EXIT;
+    }
+    if (!fdt_src->fds[fd_src])
+    {
+        goto _EXIT;
+    }
+
+    /* get a new fd*/
+    newfd = fdt_fd_new(fdt_dst);
+    if (newfd >= 0)
+    {
+        fdt_dst->fds[newfd]->mode = fdt_src->fds[fd_src]->mode;
+        fdt_dst->fds[newfd]->flags = fdt_src->fds[fd_src]->flags;
+        fdt_dst->fds[newfd]->fops = fdt_src->fds[fd_src]->fops;
+        fdt_dst->fds[newfd]->dentry = dfs_dentry_ref(fdt_src->fds[fd_src]->dentry);
+        fdt_dst->fds[newfd]->vnode = fdt_src->fds[fd_src]->vnode;
+        fdt_dst->fds[newfd]->mmap_context = RT_NULL;
+        fdt_dst->fds[newfd]->data = fdt_src->fds[fd_src]->data;
+
+        /*
+        * dma-buf/socket fd is without dentry, so should used the vnode reference.
+        */
+        if (!fdt_dst->fds[newfd]->dentry)
+        {
+            rt_atomic_add(&(fdt_dst->fds[newfd]->vnode->ref_count), 1);
+        }
+    }
+_EXIT:
+    dfs_file_unlock();
+
+    return newfd;
+}
+
+/**
+ * @brief  drop fd from the fd table.
+ *
+ * @param  fdt is the fd table, if empty, use global (_fdtab).
+ *
+ * @param  fd is the fd in the designate fd table.
+ *
+ * @return -1 on failed the drop file descriptor.
+ */
+int dfs_fdtable_drop_fd(struct dfs_fdtable *fdt, int fd)
+{
+    int err = 0;
+
+    if (fdt == NULL)
+    {
+        fdt = &_fdtab;
+    }
+
+    dfs_file_lock();
+    err = dfs_file_close(fdt->fds[fd]);
+    if (!err)
+    {
+        fdt_fd_release(fdt, fd);
+    }
+    dfs_file_unlock();
+
+    return err;
+}
+
 int dfs_dup(int oldfd, int startfd)
 {
     int newfd = -1;
diff --git a/components/dfs/dfs_v2/src/dfs_dentry.c b/components/dfs/dfs_v2/src/dfs_dentry.c
index 27054b1af5..f15aaa9cdd 100644
--- a/components/dfs/dfs_v2/src/dfs_dentry.c
+++ b/components/dfs/dfs_v2/src/dfs_dentry.c
@@ -131,6 +131,7 @@ struct dfs_dentry *dfs_dentry_unref(struct dfs_dentry *dentry)
                 LOG_I("free a dentry: %p", dentry);
                 rt_free(dentry->pathname);
                 rt_free(dentry);
+                dentry = RT_NULL;
             }
             else
             {
@@ -268,7 +269,7 @@ char* dfs_dentry_full_path(struct dfs_dentry* dentry)
         path = (char *) rt_malloc(mnt_len + path_len + 3);
         if (path)
         {
-            if (dentry->pathname[0] == '/')
+            if (dentry->pathname[0] == '/' || dentry->mnt->fullpath[mnt_len - 1] == '/')
             {
                 rt_snprintf(path, mnt_len + path_len + 2, "%s%s", dentry->mnt->fullpath,
                     dentry->pathname);
diff --git a/components/dfs/dfs_v2/src/dfs_file.c b/components/dfs/dfs_v2/src/dfs_file.c
index 9b9ff47ca3..e4f9094d67 100644
--- a/components/dfs/dfs_v2/src/dfs_file.c
+++ b/components/dfs/dfs_v2/src/dfs_file.c
@@ -429,7 +429,6 @@ int dfs_file_open(struct dfs_file *file, const char *path, int oflags, mode_t mo
                             dentry = dfs_dentry_create(mnt, fullpath);
                             if (dentry)
                             {
-                                mode &= ~S_IFMT;
                                 DLOG(msg, "dfs_file", mnt->fs_ops->name, DLOG_MSG, "fs_ops->create_vnode");
 
                                 if (dfs_is_mounted(mnt) == 0)
@@ -565,7 +564,6 @@ int dfs_file_open(struct dfs_file *file, const char *path, int oflags, mode_t mo
                     {
                         ret = -EINVAL;
                     }
-
                 }
             }
 
diff --git a/components/dfs/dfs_v2/src/dfs_file_mmap.c b/components/dfs/dfs_v2/src/dfs_file_mmap.c
index b7754f8909..430839112a 100644
--- a/components/dfs/dfs_v2/src/dfs_file_mmap.c
+++ b/components/dfs/dfs_v2/src/dfs_file_mmap.c
@@ -350,6 +350,38 @@ rt_err_t on_varea_merge(struct rt_varea *merge_to, struct rt_varea *merge_from)
     return -RT_ERROR;
 }
 
+void *on_varea_mremap(struct rt_varea *varea, rt_size_t new_size, int flags, void *new_address)
+{
+    void *vaddr = RT_NULL;
+    struct dfs_file *file = dfs_mem_obj_get_file(varea->mem_obj);
+
+#ifndef MREMAP_MAYMOVE
+#define MREMAP_MAYMOVE 1
+#endif
+
+    if (file && flags == MREMAP_MAYMOVE)
+    {
+        int ret;
+        rt_mem_obj_t mem_obj = dfs_get_mem_obj(file);
+
+        vaddr = new_address ? new_address : varea->start;
+        new_size = (new_size + ARCH_PAGE_SIZE - 1);
+        new_size &= ~ARCH_PAGE_MASK;
+        ret = rt_aspace_map(varea->aspace, &vaddr, new_size, varea->attr, varea->flag, mem_obj, varea->offset);
+        if (ret != RT_EOK)
+        {
+            LOG_E("failed to map %lx with size %lx with errno %d", vaddr, new_size, ret);
+            vaddr = RT_NULL;
+        }
+        else
+        {
+            LOG_I("old: %p size: %p new: %p size: %p", varea->start, varea->size, vaddr, new_size);
+        }
+    }
+
+    return vaddr;
+}
+
 static struct rt_mem_obj _mem_obj =
 {
     .hint_free      = hint_free,
@@ -365,6 +397,8 @@ static struct rt_mem_obj _mem_obj =
     .on_varea_expand    = on_varea_expand,
     .on_varea_split     = on_varea_split,
     .on_varea_merge     = on_varea_merge,
+
+    .on_varea_mremap    = on_varea_mremap,
 };
 
 struct dfs_mem_obj {
diff --git a/components/dfs/dfs_v2/src/dfs_pcache.c b/components/dfs/dfs_v2/src/dfs_pcache.c
index 00118a756d..e71bacf802 100644
--- a/components/dfs/dfs_v2/src/dfs_pcache.c
+++ b/components/dfs/dfs_v2/src/dfs_pcache.c
@@ -1355,6 +1355,10 @@ int dfs_aspace_unmap(struct dfs_file *file, struct rt_varea *varea)
 
                             if (map && varea == map->varea)
                             {
+                                void *vaddr = dfs_aspace_vaddr(map->varea, page->fpos);
+
+                                rt_varea_unmap_page(map->varea, vaddr);
+
                                 if (varea->attr == MMU_MAP_U_RWCB && page->fpos < page->aspace->vnode->size)
                                 {
                                     dfs_page_dirty(page);