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Commit 442e31ca authored by Jeff Layton's avatar Jeff Layton Committed by Al Viro
Browse files

vfs: fix linkat to retry once on ESTALE errors 



Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent f46d3567

fs/namei.c

+7 −2
Original line number Diff line number Diff line
@@ -3626,12 +3626,13 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname, 


	if (flags & AT_SYMLINK_FOLLOW)

		how |= LOOKUP_FOLLOW;



retry:

	error = user_path_at(olddfd, oldname, how, &old_path);

	if (error)

		return error;



	new_dentry = user_path_create(newdfd, newname, &new_path, 0);

	new_dentry = user_path_create(newdfd, newname, &new_path,

					(how & LOOKUP_REVAL));

	error = PTR_ERR(new_dentry);

	if (IS_ERR(new_dentry))

		goto out;
@@ -3648,6 +3649,10 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname, 
	error = vfs_link(old_path.dentry, new_path.dentry->d_inode, new_dentry);

out_dput:

	done_path_create(&new_path, new_dentry);

	if (retry_estale(error, how)) {

		how |= LOOKUP_REVAL;

		goto retry;

	}

out:

	path_put(&old_path);