[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/qnx4/dir.c b/src/kernel/linux/v4.14/fs/qnx4/dir.c
new file mode 100644
index 0000000..a6ee23a
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/qnx4/dir.c
@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * QNX4 file system, Linux implementation.
+ *
+ * Version : 0.2.1
+ *
+ * Using parts of the xiafs filesystem.
+ *
+ * History :
+ *
+ * 28-05-1998 by Richard Frowijn : first release.
+ * 20-06-1998 by Frank Denis : Linux 2.1.99+ & dcache support.
+ */
+
+#include <linux/buffer_head.h>
+#include "qnx4.h"
+
+static int qnx4_readdir(struct file *file, struct dir_context *ctx)
+{
+ struct inode *inode = file_inode(file);
+ unsigned int offset;
+ struct buffer_head *bh;
+ struct qnx4_inode_entry *de;
+ struct qnx4_link_info *le;
+ unsigned long blknum;
+ int ix, ino;
+ int size;
+
+ QNX4DEBUG((KERN_INFO "qnx4_readdir:i_size = %ld\n", (long) inode->i_size));
+ QNX4DEBUG((KERN_INFO "pos = %ld\n", (long) ctx->pos));
+
+ while (ctx->pos < inode->i_size) {
+ blknum = qnx4_block_map(inode, ctx->pos >> QNX4_BLOCK_SIZE_BITS);
+ bh = sb_bread(inode->i_sb, blknum);
+ if (bh == NULL) {
+ printk(KERN_ERR "qnx4_readdir: bread failed (%ld)\n", blknum);
+ return 0;
+ }
+ ix = (ctx->pos >> QNX4_DIR_ENTRY_SIZE_BITS) % QNX4_INODES_PER_BLOCK;
+ for (; ix < QNX4_INODES_PER_BLOCK; ix++, ctx->pos += QNX4_DIR_ENTRY_SIZE) {
+ offset = ix * QNX4_DIR_ENTRY_SIZE;
+ de = (struct qnx4_inode_entry *) (bh->b_data + offset);
+ if (!de->di_fname[0])
+ continue;
+ if (!(de->di_status & (QNX4_FILE_USED|QNX4_FILE_LINK)))
+ continue;
+ if (!(de->di_status & QNX4_FILE_LINK))
+ size = QNX4_SHORT_NAME_MAX;
+ else
+ size = QNX4_NAME_MAX;
+ size = strnlen(de->di_fname, size);
+ QNX4DEBUG((KERN_INFO "qnx4_readdir:%.*s\n", size, de->di_fname));
+ if (!(de->di_status & QNX4_FILE_LINK))
+ ino = blknum * QNX4_INODES_PER_BLOCK + ix - 1;
+ else {
+ le = (struct qnx4_link_info*)de;
+ ino = ( le32_to_cpu(le->dl_inode_blk) - 1 ) *
+ QNX4_INODES_PER_BLOCK +
+ le->dl_inode_ndx;
+ }
+ if (!dir_emit(ctx, de->di_fname, size, ino, DT_UNKNOWN)) {
+ brelse(bh);
+ return 0;
+ }
+ }
+ brelse(bh);
+ }
+ return 0;
+}
+
+const struct file_operations qnx4_dir_operations =
+{
+ .llseek = generic_file_llseek,
+ .read = generic_read_dir,
+ .iterate_shared = qnx4_readdir,
+ .fsync = generic_file_fsync,
+};
+
+const struct inode_operations qnx4_dir_inode_operations =
+{
+ .lookup = qnx4_lookup,
+};