提交 bfe8804d 编写于 作者: C Christoph Hellwig 提交者: Dave Chinner

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: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NDave Chinner <dchinner@redhat.com>
Signed-off-by: NDave Chinner <david@fromorbit.com>
上级 2b3d1d41
......@@ -4515,7 +4515,6 @@ int readlink_copy(char __user *buffer, int buflen, const char *link)
out:
return len;
}
EXPORT_SYMBOL(readlink_copy);
/*
* A helper for ->readlink(). This should be used *ONLY* for symlinks that
......
......@@ -277,7 +277,6 @@ xfs_readlink_by_handle(
{
struct dentry *dentry;
__u32 olen;
void *link;
int error;
if (!capable(CAP_SYS_ADMIN))
......@@ -288,7 +287,7 @@ xfs_readlink_by_handle(
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 @@ xfs_readlink_by_handle(
goto out_dput;
}
link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
if (!link) {
error = -ENOMEM;
goto out_dput;
}
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;
error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen);
out_kfree:
kfree(link);
out_dput:
dput(dentry);
return error;
......
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