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Open Source and information security mailing list archives
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Date: Mon, 7 Dec 2020 18:14:56 +0100 From: Christoph Hellwig <hch@....de> To: Christian Brauner <christian.brauner@...ntu.com> Cc: Alexander Viro <viro@...iv.linux.org.uk>, Christoph Hellwig <hch@...radead.org>, linux-fsdevel@...r.kernel.org, John Johansen <john.johansen@...onical.com>, James Morris <jmorris@...ei.org>, Mimi Zohar <zohar@...ux.ibm.com>, Dmitry Kasatkin <dmitry.kasatkin@...il.com>, Stephen Smalley <stephen.smalley.work@...il.com>, Casey Schaufler <casey@...aufler-ca.com>, Arnd Bergmann <arnd@...db.de>, Andreas Dilger <adilger.kernel@...ger.ca>, OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>, Geoffrey Thomas <geofft@...reload.com>, Mrunal Patel <mpatel@...hat.com>, Josh Triplett <josh@...htriplett.org>, Andy Lutomirski <luto@...nel.org>, Theodore Tso <tytso@....edu>, Alban Crequy <alban@...volk.io>, Tycho Andersen <tycho@...ho.ws>, David Howells <dhowells@...hat.com>, James Bottomley <James.Bottomley@...senpartnership.com>, Seth Forshee <seth.forshee@...onical.com>, Stéphane Graber <stgraber@...ntu.com>, Aleksa Sarai <cyphar@...har.com>, Lennart Poettering <lennart@...ttering.net>, "Eric W. Biederman" <ebiederm@...ssion.com>, smbarber@...omium.org, Phil Estes <estesp@...il.com>, Serge Hallyn <serge@...lyn.com>, Kees Cook <keescook@...omium.org>, Todd Kjos <tkjos@...gle.com>, Paul Moore <paul@...l-moore.com>, Jonathan Corbet <corbet@....net>, containers@...ts.linux-foundation.org, linux-security-module@...r.kernel.org, linux-api@...r.kernel.org, linux-ext4@...r.kernel.org, linux-integrity@...r.kernel.org, selinux@...r.kernel.org, Christoph Hellwig <hch@....de> Subject: Re: [PATCH v4 06/40] fs: add mount_setattr() > + switch (attr->propagation) { > + case 0: > + kattr->propagation = 0; > + break; > + case MS_UNBINDABLE: > + kattr->propagation = MS_UNBINDABLE; > + break; > + case MS_PRIVATE: > + kattr->propagation = MS_PRIVATE; > + break; > + case MS_SLAVE: > + kattr->propagation = MS_SLAVE; > + break; > + case MS_SHARED: > + kattr->propagation = MS_SHARED; > + break; > + default: > + return -EINVAL; > + } This can be shortened to: #define MOUNT_SETATTR_PROPAGATION_FLAGS \ (MS_UNBINDABLE | MS_PRIVATE | MS_SLAVE | MS_SHARED) if (attr->propagation & ~MOUNT_SETATTR_PROPAGATION_FLAGS) return -EINVAL; if (hweight32(attr->propagation & MOUNT_SETATTR_PROPAGATION_FLAGS) > 1) return -EINVAL; kattr->propagation = attr->propagation; > +asmlinkage long sys_mount_setattr(int dfd, const char __user *path, unsigned int flags, Overly long line. Otherwise looks good: Reviewed-by: Christoph Hellwig <hch@....de>
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