1 files changed, 58 insertions, 0 deletions

diff --git a/fs/efs/symlink.c b/fs/efs/symlink.c
new file mode 100644
index 000000000000..3d9a350e3e7f
--- /dev/null
+++ b/fs/efs/symlink.c
@@ -0,0 +1,58 @@
+/*
+ * symlink.c
+ *
+ * Copyright (c) 1999 Al Smith
+ *
+ * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
+ */
+
+#include <linux/string.h>
+#include <linux/efs_fs.h>
+#include <linux/pagemap.h>
+#include <linux/buffer_head.h>
+#include <linux/smp_lock.h>
+
+static int efs_symlink_readpage(struct file *file, struct page *page)
+{
+        char *link = kmap(page);
+        struct buffer_head * bh;
+        struct inode * inode = page->mapping->host;
+        efs_block_t size = inode->i_size;
+        int err;
+  
+        err = -ENAMETOOLONG;
+        if (size > 2 * EFS_BLOCKSIZE)
+                goto fail;
+  
+        lock_kernel();
+        /* read first 512 bytes of link target */
+        err = -EIO;
+        bh = sb_bread(inode->i_sb, efs_bmap(inode, 0));
+        if (!bh)
+                goto fail;
+        memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size);
+        brelse(bh);
+        if (size > EFS_BLOCKSIZE) {
+                bh = sb_bread(inode->i_sb, efs_bmap(inode, 1));
+                if (!bh)
+                        goto fail;
+                memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE);
+                brelse(bh);
+        }
+        link[size] = '\0';
+        unlock_kernel();
+        SetPageUptodate(page);
+        kunmap(page);
+        unlock_page(page);
+        return 0;
+fail:
+        unlock_kernel();
+        SetPageError(page);
+        kunmap(page);
+        unlock_page(page);
+        return err;
+}
+
+struct address_space_operations efs_symlink_aops = {
+        .readpage       = efs_symlink_readpage
+};