diff mbox

[RFC,v3,30/45] richacl: Create richacl from mode values

Message ID b435787dd651572f42984f9dec2a68cbf38bc7bf.1429868795.git.agruenba@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Andreas Grünbacher April 24, 2015, 11:04 a.m. UTC 
Create a richacl that corresponds to given file mode permission bits.

Signed-off-by: Andreas Gruenbacher <agruen@kernel.org>
---
 fs/richacl_compat.c     | 38 ++++++++++++++++++++++++++++++++++++++
 include/linux/richacl.h |  1 +
 2 files changed, 39 insertions(+)

Comments

J. Bruce Fields May 28, 2015, 7:24 p.m. UTC | #1 
On Fri, Apr 24, 2015 at 01:04:27PM +0200, Andreas Gruenbacher wrote:
> Create a richacl that corresponds to given file mode permission bits.
> 
> Signed-off-by: Andreas Gruenbacher <agruen@kernel.org>
> ---
>  fs/richacl_compat.c     | 38 ++++++++++++++++++++++++++++++++++++++
>  include/linux/richacl.h |  1 +
>  2 files changed, 39 insertions(+)
> 
> diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c
> index 49af600..8ebe772 100644
> --- a/fs/richacl_compat.c
> +++ b/fs/richacl_compat.c
> @@ -750,3 +750,41 @@ richacl_apply_masks(struct richacl **acl)
>  	return 0;
>  }
>  EXPORT_SYMBOL_GPL(richacl_apply_masks);
> +
> +/**
> + * richacl_from_mode_unmasked  -  create an acl which corresponds to @mode
> + *
> + * The resulting acl doesn't have the RICHACL_MASKED flag set.

That seems to disagree with:

> + *
> + * @mode:	file mode including the file type
> + */
> +struct richacl *
> +richacl_from_mode_unmasked(mode_t mode)
> +{
> +	struct richacl *acl;
> +	struct richace *ace;
> +
> +	acl = richacl_alloc(1, GFP_KERNEL);
> +	if (!acl)
> +		return NULL;
> +	acl->a_flags = RICHACL_MASKED;

this line?

--b.

> +	acl->a_owner_mask = richacl_mode_to_mask(mode >> 6) |
> +			    RICHACE_POSIX_OWNER_ALLOWED;
> +	acl->a_group_mask = richacl_mode_to_mask(mode >> 3);
> +	acl->a_other_mask = richacl_mode_to_mask(mode);
> +
> +	ace = acl->a_entries;
> +	ace->e_type  = RICHACE_ACCESS_ALLOWED_ACE_TYPE;
> +	ace->e_flags = RICHACE_SPECIAL_WHO;
> +	ace->e_mask = RICHACE_POSIX_ALWAYS_ALLOWED |
> +		      RICHACE_POSIX_MODE_ALL |
> +		      RICHACE_POSIX_OWNER_ALLOWED;
> +	/* RICHACE_DELETE_CHILD is meaningless for non-directories. */
> +	if (!S_ISDIR(mode))
> +		ace->e_mask &= ~RICHACE_DELETE_CHILD;
> +	ace->e_id.special = RICHACE_EVERYONE_SPECIAL_ID;
> +
> +	return acl;
> +
> +}
> +EXPORT_SYMBOL_GPL(richacl_from_mode_unmasked);
> diff --git a/include/linux/richacl.h b/include/linux/richacl.h
> index 6a97dca..25ff4df 100644
> --- a/include/linux/richacl.h
> +++ b/include/linux/richacl.h
> @@ -327,5 +327,6 @@ extern struct richacl *richacl_create(struct inode *, struct inode *);
>  
>  /* richacl_compat.c */
>  extern int richacl_apply_masks(struct richacl **);
> +extern struct richacl *richacl_from_mode_unmasked(mode_t);
>  
>  #endif /* __RICHACL_H */
> -- 
> 2.1.0
> 
> --
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J. Bruce Fields May 28, 2015, 7:25 p.m. UTC | #2 
On Thu, May 28, 2015 at 03:24:13PM -0400, bfields wrote:
> On Fri, Apr 24, 2015 at 01:04:27PM +0200, Andreas Gruenbacher wrote:
> > Create a richacl that corresponds to given file mode permission bits.
> > 
> > Signed-off-by: Andreas Gruenbacher <agruen@kernel.org>
> > ---
> >  fs/richacl_compat.c     | 38 ++++++++++++++++++++++++++++++++++++++
> >  include/linux/richacl.h |  1 +
> >  2 files changed, 39 insertions(+)
> > 
> > diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c
> > index 49af600..8ebe772 100644
> > --- a/fs/richacl_compat.c
> > +++ b/fs/richacl_compat.c
> > @@ -750,3 +750,41 @@ richacl_apply_masks(struct richacl **acl)
> >  	return 0;
> >  }
> >  EXPORT_SYMBOL_GPL(richacl_apply_masks);
> > +
> > +/**
> > + * richacl_from_mode_unmasked  -  create an acl which corresponds to @mode
> > + *
> > + * The resulting acl doesn't have the RICHACL_MASKED flag set.
> 
> That seems to disagree with:
> 
> > + *
> > + * @mode:	file mode including the file type
> > + */
> > +struct richacl *
> > +richacl_from_mode_unmasked(mode_t mode)
> > +{
> > +	struct richacl *acl;
> > +	struct richace *ace;
> > +
> > +	acl = richacl_alloc(1, GFP_KERNEL);
> > +	if (!acl)
> > +		return NULL;
> > +	acl->a_flags = RICHACL_MASKED;
> 
> this line?

OK, looks like that's a temporary issue, fixed by the next patch.
Might be simpler just to squash the two patches and skip this step?

--b.

> 
> --b.
> 
> > +	acl->a_owner_mask = richacl_mode_to_mask(mode >> 6) |
> > +			    RICHACE_POSIX_OWNER_ALLOWED;
> > +	acl->a_group_mask = richacl_mode_to_mask(mode >> 3);
> > +	acl->a_other_mask = richacl_mode_to_mask(mode);
> > +
> > +	ace = acl->a_entries;
> > +	ace->e_type  = RICHACE_ACCESS_ALLOWED_ACE_TYPE;
> > +	ace->e_flags = RICHACE_SPECIAL_WHO;
> > +	ace->e_mask = RICHACE_POSIX_ALWAYS_ALLOWED |
> > +		      RICHACE_POSIX_MODE_ALL |
> > +		      RICHACE_POSIX_OWNER_ALLOWED;
> > +	/* RICHACE_DELETE_CHILD is meaningless for non-directories. */
> > +	if (!S_ISDIR(mode))
> > +		ace->e_mask &= ~RICHACE_DELETE_CHILD;
> > +	ace->e_id.special = RICHACE_EVERYONE_SPECIAL_ID;
> > +
> > +	return acl;
> > +
> > +}
> > +EXPORT_SYMBOL_GPL(richacl_from_mode_unmasked);
> > diff --git a/include/linux/richacl.h b/include/linux/richacl.h
> > index 6a97dca..25ff4df 100644
> > --- a/include/linux/richacl.h
> > +++ b/include/linux/richacl.h
> > @@ -327,5 +327,6 @@ extern struct richacl *richacl_create(struct inode *, struct inode *);
> >  
> >  /* richacl_compat.c */
> >  extern int richacl_apply_masks(struct richacl **);
> > +extern struct richacl *richacl_from_mode_unmasked(mode_t);
> >  
> >  #endif /* __RICHACL_H */
> > -- 
> > 2.1.0
> > 
> > --
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> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
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Andreas Grünbacher May 28, 2015, 7:58 p.m. UTC | #3 
2015-05-28 21:25 GMT+02:00 J. Bruce Fields <bfields@fieldses.org>:
> OK, looks like that's a temporary issue, fixed by the next patch.
> Might be simpler just to squash the two patches and skip this step?

Yes, sorry for the mistake. I've already squashed these two commits.

Thanks,
Andreas
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diff mbox

Patch

diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c
index 49af600..8ebe772 100644
--- a/fs/richacl_compat.c
+++ b/fs/richacl_compat.c
@@ -750,3 +750,41 @@  richacl_apply_masks(struct richacl **acl)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(richacl_apply_masks);
+
+/**
+ * richacl_from_mode_unmasked  -  create an acl which corresponds to @mode
+ *
+ * The resulting acl doesn't have the RICHACL_MASKED flag set.
+ *
+ * @mode:	file mode including the file type
+ */
+struct richacl *
+richacl_from_mode_unmasked(mode_t mode)
+{
+	struct richacl *acl;
+	struct richace *ace;
+
+	acl = richacl_alloc(1, GFP_KERNEL);
+	if (!acl)
+		return NULL;
+	acl->a_flags = RICHACL_MASKED;
+	acl->a_owner_mask = richacl_mode_to_mask(mode >> 6) |
+			    RICHACE_POSIX_OWNER_ALLOWED;
+	acl->a_group_mask = richacl_mode_to_mask(mode >> 3);
+	acl->a_other_mask = richacl_mode_to_mask(mode);
+
+	ace = acl->a_entries;
+	ace->e_type  = RICHACE_ACCESS_ALLOWED_ACE_TYPE;
+	ace->e_flags = RICHACE_SPECIAL_WHO;
+	ace->e_mask = RICHACE_POSIX_ALWAYS_ALLOWED |
+		      RICHACE_POSIX_MODE_ALL |
+		      RICHACE_POSIX_OWNER_ALLOWED;
+	/* RICHACE_DELETE_CHILD is meaningless for non-directories. */
+	if (!S_ISDIR(mode))
+		ace->e_mask &= ~RICHACE_DELETE_CHILD;
+	ace->e_id.special = RICHACE_EVERYONE_SPECIAL_ID;
+
+	return acl;
+
+}
+EXPORT_SYMBOL_GPL(richacl_from_mode_unmasked);
diff --git a/include/linux/richacl.h b/include/linux/richacl.h
index 6a97dca..25ff4df 100644
--- a/include/linux/richacl.h
+++ b/include/linux/richacl.h
@@ -327,5 +327,6 @@  extern struct richacl *richacl_create(struct inode *, struct inode *);
 
 /* richacl_compat.c */
 extern int richacl_apply_masks(struct richacl **);
+extern struct richacl *richacl_from_mode_unmasked(mode_t);
 
 #endif /* __RICHACL_H */