xfs: use ->readlink to implement the readlink_by_handle ioctl
Also drop the now unused readlink_copy export.
[dchinner: use d_inode(dentry) rather than dentry->d_inode]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
diff --git a/fs/namei.c b/fs/namei.c
index 794f81d..cdd0419 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -4515,7 +4515,6 @@
out:
return len;
}
-EXPORT_SYMBOL(readlink_copy);
/*
* A helper for ->readlink(). This should be used *ONLY* for symlinks that
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index bcb6c19..5414bca 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -277,7 +277,6 @@
{
struct dentry *dentry;
__u32 olen;
- void *link;
int error;
if (!capable(CAP_SYS_ADMIN))
@@ -288,7 +287,7 @@
return PTR_ERR(dentry);
/* Restrict this handle operation to symlinks only. */
- if (!d_is_symlink(dentry)) {
+ if (!d_inode(dentry)->i_op->readlink) {
error = -EINVAL;
goto out_dput;
}
@@ -298,21 +297,8 @@
goto out_dput;
}
- link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
- if (!link) {
- error = -ENOMEM;
- goto out_dput;
- }
+ error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen);
- error = xfs_readlink(XFS_I(d_inode(dentry)), link);
- if (error)
- goto out_kfree;
- error = readlink_copy(hreq->ohandle, olen, link);
- if (error)
- goto out_kfree;
-
- out_kfree:
- kfree(link);
out_dput:
dput(dentry);
return error;
