linux-ext4 - [PATCH V4 04/11] misc/create

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Message-ID: <1393661175-459-5-git-send-email-liezhi.yang@windriver.com>
Date:	Sat, 1 Mar 2014 03:06:08 -0500
From:	Robert Yang <liezhi.yang@...driver.com>
To:	<tytso@....edu>, <dvhart@...ux.intel.com>
CC:	<linux-ext4@...r.kernel.org>
Subject: [PATCH V4 04/11] misc/create_inode.c: create symlink

The do_symlink_internal() is used for creating symlinks, most of the
code are from debugfs/debugfs.c, the debugfs/debugfs.c will be modified
to use this function.

Signed-off-by: Robert Yang <liezhi.yang@...driver.com>
Reviewed-by: Darren Hart <dvhart@...ux.intel.com>
---
 misc/create_inode.c |   32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/misc/create_inode.c b/misc/create_inode.c
index 4da8aff..f845103 100644
--- a/misc/create_inode.c
+++ b/misc/create_inode.c
@@ -88,6 +88,38 @@ errcode_t do_mknod_internal(ext2_ino_t cwd, const char *name, struct stat *st)
 /* Make a symlink name -> target */
 errcode_t do_symlink_internal(ext2_ino_t cwd, const char *name, char *target)
 {
+	char			*cp;
+	ext2_ino_t		parent_ino;
+	errcode_t		retval;
+	struct ext2_inode	inode;
+	struct stat		st;
+
+	cp = strrchr(name, '/');
+	if (cp) {
+		*cp = 0;
+		if ((retval =  ext2fs_namei(current_fs, root, cwd, name, &parent_ino))){
+			com_err(name, retval, 0);
+			return retval;
+		}
+		name = cp+1;
+	} else
+		parent_ino = cwd;
+
+try_again:
+	retval = ext2fs_symlink(current_fs, parent_ino, 0, name, target);
+	if (retval == EXT2_ET_DIR_NO_SPACE) {
+		retval = ext2fs_expand_dir(current_fs, parent_ino);
+		if (retval) {
+			com_err("do_symlink_internal", retval, "while expanding directory");
+			return retval;
+		}
+		goto try_again;
+	}
+	if (retval) {
+		com_err("ext2fs_symlink", retval, 0);
+		return retval;
+	}
+
 }
 
 /* Make a directory in the fs */
-- 
1.7.10.4

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