GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/gmp/drv/osal/linux/kernel/osal_fileops.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) XMEDIA. All rights reserved.
+ */
+#include "osal.h"
+#include <linux/version.h>
+#include <linux/fs.h>
+#include <asm/uaccess.h>
+
+struct file *klib_fopen(const char *filename, int flags, int mode)
+{
+    struct file *filp = filp_open(filename, flags, mode);
+    return (IS_ERR(filp)) ? NULL : filp;
+}
+
+void klib_fclose(struct file *filp)
+{
+    if (filp != NULL) {
+        filp_close(filp, NULL);
+    }
+    return;
+}
+
+int klib_fwrite(const char *buf, int len, struct file *filp)
+{
+    int writelen;
+
+    if (filp == NULL) {
+        return -ENOENT;
+    }
+
+    writelen = __kernel_write(filp, buf, len, &filp->f_pos);
+    return writelen;
+}
+
+int klib_fread(char *buf, unsigned int len, struct file *filp)
+{
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
+    mm_segment_t old_fs;
+    int readlen;
+#endif
+    if (filp == NULL) {
+        return -ENOENT;
+    }
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
+    old_fs = get_fs();
+    set_fs(get_ds());
+    /* The cast to a user pointer is valid due to the set_fs() */
+    readlen = vfs_read(filp, (void __user *)buf, len, &filp->f_pos);
+    set_fs(old_fs);
+    return readlen;
+#else
+    return kernel_read(filp, (void __user*)buf, len, &filp->f_pos);
+#endif
+}
+
+void *osal_klib_fopen(const char *filename, int flags, int mode)
+{
+    return (void *)klib_fopen(filename, flags, mode);
+}
+EXPORT_SYMBOL(osal_klib_fopen);
+
+void osal_klib_fclose(void *filp)
+{
+    klib_fclose((struct file *)filp);
+}
+EXPORT_SYMBOL(osal_klib_fclose);
+
+int osal_klib_fwrite(const char *buf, int len, void *filp)
+{
+    return klib_fwrite(buf, len, (struct file *)filp);
+}
+EXPORT_SYMBOL(osal_klib_fwrite);
+
+int osal_klib_fread(char *buf, unsigned int len, void *filp)
+{
+    return klib_fread(buf, len, (struct file *)filp);
+}
+EXPORT_SYMBOL(osal_klib_fread);
+