Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / efs / file.c

diff --git a/kernel/fs/efs/file.c b/kernel/fs/efs/file.c
new file mode 100644 (file)
index 0000000..a37dcee
--- /dev/null
+++ b/kernel/fs/efs/file.c
@@ -0,0 +1,56 @@
+/*
+ * file.c
+ *
+ * Copyright (c) 1999 Al Smith
+ *
+ * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
+ */
+
+#include <linux/buffer_head.h>
+#include "efs.h"
+
+int efs_get_block(struct inode *inode, sector_t iblock,
+                 struct buffer_head *bh_result, int create)
+{
+       int error = -EROFS;
+       long phys;
+
+       if (create)
+               return error;
+       if (iblock >= inode->i_blocks) {
+#ifdef DEBUG
+               /*
+                * i have no idea why this happens as often as it does
+                */
+               pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
+                       __func__, block, inode->i_blocks, inode->i_size);
+#endif
+               return 0;
+       }
+       phys = efs_map_block(inode, iblock);
+       if (phys)
+               map_bh(bh_result, inode->i_sb, phys);
+       return 0;
+}
+
+int efs_bmap(struct inode *inode, efs_block_t block) {
+
+       if (block < 0) {
+               pr_warn("%s(): block < 0\n", __func__);
+               return 0;
+       }
+
+       /* are we about to read past the end of a file ? */
+       if (!(block < inode->i_blocks)) {
+#ifdef DEBUG
+               /*
+                * i have no idea why this happens as often as it does
+                */
+               pr_warn("%s(): block %d >= %ld (filesize %ld)\n",
+                       __func__, block, inode->i_blocks, inode->i_size);
+#endif
+               return 0;
+       }
+
+       return efs_map_block(inode, block);
+}