| Message ID | 20231006184922.252188-18-aalbersh@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | fs-verity support for XFS | expand |
On Fri, Oct 06, 2023 at 08:49:11PM +0200, Andrey Albershteyn wrote: > The Merkle tree blocks and descriptor are stored in the extended > attributes of the inode. Add new attribute type for fs-verity > metadata. Add XFS_ATTR_INTERNAL_MASK to skip parent pointer and > fs-verity attributes as those are only for internal use. While we're > at it add a few comments in relevant places that internally visible > attributes are not suppose to be handled via interface defined in > xfs_xattr.c. > > Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com> > --- > fs/xfs/libxfs/xfs_da_format.h | 10 +++++++++- > fs/xfs/libxfs/xfs_log_format.h | 1 + > fs/xfs/xfs_ioctl.c | 5 +++++ > fs/xfs/xfs_trace.h | 1 + > fs/xfs/xfs_xattr.c | 9 +++++++++ > 5 files changed, 25 insertions(+), 1 deletion(-) > > diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h > index 6deefe03207f..b56bdae83563 100644 > --- a/fs/xfs/libxfs/xfs_da_format.h > +++ b/fs/xfs/libxfs/xfs_da_format.h > @@ -699,14 +699,22 @@ struct xfs_attr3_leafblock { > #define XFS_ATTR_ROOT_BIT 1 /* limit access to trusted attrs */ > #define XFS_ATTR_SECURE_BIT 2 /* limit access to secure attrs */ > #define XFS_ATTR_PARENT_BIT 3 /* parent pointer attrs */ > +#define XFS_ATTR_VERITY_BIT 4 /* verity merkle tree and descriptor */ > #define XFS_ATTR_INCOMPLETE_BIT 7 /* attr in middle of create/delete */ > #define XFS_ATTR_LOCAL (1u << XFS_ATTR_LOCAL_BIT) > #define XFS_ATTR_ROOT (1u << XFS_ATTR_ROOT_BIT) > #define XFS_ATTR_SECURE (1u << XFS_ATTR_SECURE_BIT) > #define XFS_ATTR_PARENT (1u << XFS_ATTR_PARENT_BIT) > +#define XFS_ATTR_VERITY (1u << XFS_ATTR_VERITY_BIT) > #define XFS_ATTR_INCOMPLETE (1u << XFS_ATTR_INCOMPLETE_BIT) > #define XFS_ATTR_NSP_ONDISK_MASK \ > - (XFS_ATTR_ROOT | XFS_ATTR_SECURE | XFS_ATTR_PARENT) > + (XFS_ATTR_ROOT | XFS_ATTR_SECURE | XFS_ATTR_PARENT | \ > + XFS_ATTR_VERITY) > + > +/* > + * Internal attributes not exposed to the user > + */ > +#define XFS_ATTR_INTERNAL_MASK (XFS_ATTR_PARENT | XFS_ATTR_VERITY) > > /* > * Alignment for namelist and valuelist entries (since they are mixed > diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h > index 0bc1749fb7bb..c42cc58cd152 100644 > --- a/fs/xfs/libxfs/xfs_log_format.h > +++ b/fs/xfs/libxfs/xfs_log_format.h > @@ -975,6 +975,7 @@ struct xfs_icreate_log { > #define XFS_ATTRI_FILTER_MASK (XFS_ATTR_ROOT | \ > XFS_ATTR_SECURE | \ > XFS_ATTR_PARENT | \ > + XFS_ATTR_VERITY | \ > XFS_ATTR_INCOMPLETE) > > /* > diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c > index 55bb01173cde..3d6d680b6cf3 100644 > --- a/fs/xfs/xfs_ioctl.c > +++ b/fs/xfs/xfs_ioctl.c > @@ -351,6 +351,11 @@ static unsigned int > xfs_attr_filter( > u32 ioc_flags) > { > + /* > + * Only externally visible attributes should be specified here. > + * Internally used attributes (such as parent pointers or fs-verity) > + * should not be exposed to userspace. > + */ > if (ioc_flags & XFS_IOC_ATTR_ROOT) > return XFS_ATTR_ROOT; > if (ioc_flags & XFS_IOC_ATTR_SECURE) > diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h > index 3926cf7f2a6e..3696709907bf 100644 > --- a/fs/xfs/xfs_trace.h > +++ b/fs/xfs/xfs_trace.h > @@ -82,6 +82,7 @@ struct xfs_perag; > #define XFS_ATTR_FILTER_FLAGS \ > { XFS_ATTR_ROOT, "ROOT" }, \ > { XFS_ATTR_SECURE, "SECURE" }, \ > + { XFS_ATTR_VERITY, "VERITY" }, \ > { XFS_ATTR_INCOMPLETE, "INCOMPLETE" } > > DECLARE_EVENT_CLASS(xfs_attr_list_class, > diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c > index a3975f325f4e..56f7f4122fcb 100644 > --- a/fs/xfs/xfs_xattr.c > +++ b/fs/xfs/xfs_xattr.c > @@ -20,6 +20,12 @@ > > #include <linux/posix_acl_xattr.h> > > +/* > + * This file defines interface to work with externally visible extended > + * attributes, such as those in system or security namespaces. This interface "...such as those in user, system, or security namespaces." With that fixed, Reviewed-by: Darrick J. Wong <djwong@kernel.org> --D > + * should not be used for internally used attributes (consider xfs_attr.c). > + */ > + > /* > * Get permission to use log-assisted atomic exchange of file extents. > * > @@ -241,6 +247,9 @@ xfs_xattr_put_listent( > > ASSERT(context->count >= 0); > > + if (flags & XFS_ATTR_INTERNAL_MASK) > + return; > + > if (flags & XFS_ATTR_ROOT) { > #ifdef CONFIG_XFS_POSIX_ACL > if (namelen == SGI_ACL_FILE_SIZE && > -- > 2.40.1 >
diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h index 6deefe03207f..b56bdae83563 100644 --- a/fs/xfs/libxfs/xfs_da_format.h +++ b/fs/xfs/libxfs/xfs_da_format.h @@ -699,14 +699,22 @@ struct xfs_attr3_leafblock { #define XFS_ATTR_ROOT_BIT 1 /* limit access to trusted attrs */ #define XFS_ATTR_SECURE_BIT 2 /* limit access to secure attrs */ #define XFS_ATTR_PARENT_BIT 3 /* parent pointer attrs */ +#define XFS_ATTR_VERITY_BIT 4 /* verity merkle tree and descriptor */ #define XFS_ATTR_INCOMPLETE_BIT 7 /* attr in middle of create/delete */ #define XFS_ATTR_LOCAL (1u << XFS_ATTR_LOCAL_BIT) #define XFS_ATTR_ROOT (1u << XFS_ATTR_ROOT_BIT) #define XFS_ATTR_SECURE (1u << XFS_ATTR_SECURE_BIT) #define XFS_ATTR_PARENT (1u << XFS_ATTR_PARENT_BIT) +#define XFS_ATTR_VERITY (1u << XFS_ATTR_VERITY_BIT) #define XFS_ATTR_INCOMPLETE (1u << XFS_ATTR_INCOMPLETE_BIT) #define XFS_ATTR_NSP_ONDISK_MASK \ - (XFS_ATTR_ROOT | XFS_ATTR_SECURE | XFS_ATTR_PARENT) + (XFS_ATTR_ROOT | XFS_ATTR_SECURE | XFS_ATTR_PARENT | \ + XFS_ATTR_VERITY) + +/* + * Internal attributes not exposed to the user + */ +#define XFS_ATTR_INTERNAL_MASK (XFS_ATTR_PARENT | XFS_ATTR_VERITY) /* * Alignment for namelist and valuelist entries (since they are mixed diff --git a/fs/xfs/libxfs/xfs_log_format.h b/fs/xfs/libxfs/xfs_log_format.h index 0bc1749fb7bb..c42cc58cd152 100644 --- a/fs/xfs/libxfs/xfs_log_format.h +++ b/fs/xfs/libxfs/xfs_log_format.h @@ -975,6 +975,7 @@ struct xfs_icreate_log { #define XFS_ATTRI_FILTER_MASK (XFS_ATTR_ROOT | \ XFS_ATTR_SECURE | \ XFS_ATTR_PARENT | \ + XFS_ATTR_VERITY | \ XFS_ATTR_INCOMPLETE) /* diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 55bb01173cde..3d6d680b6cf3 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -351,6 +351,11 @@ static unsigned int xfs_attr_filter( u32 ioc_flags) { + /* + * Only externally visible attributes should be specified here. + * Internally used attributes (such as parent pointers or fs-verity) + * should not be exposed to userspace. + */ if (ioc_flags & XFS_IOC_ATTR_ROOT) return XFS_ATTR_ROOT; if (ioc_flags & XFS_IOC_ATTR_SECURE) diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h index 3926cf7f2a6e..3696709907bf 100644 --- a/fs/xfs/xfs_trace.h +++ b/fs/xfs/xfs_trace.h @@ -82,6 +82,7 @@ struct xfs_perag; #define XFS_ATTR_FILTER_FLAGS \ { XFS_ATTR_ROOT, "ROOT" }, \ { XFS_ATTR_SECURE, "SECURE" }, \ + { XFS_ATTR_VERITY, "VERITY" }, \ { XFS_ATTR_INCOMPLETE, "INCOMPLETE" } DECLARE_EVENT_CLASS(xfs_attr_list_class, diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c index a3975f325f4e..56f7f4122fcb 100644 --- a/fs/xfs/xfs_xattr.c +++ b/fs/xfs/xfs_xattr.c @@ -20,6 +20,12 @@ #include <linux/posix_acl_xattr.h> +/* + * This file defines interface to work with externally visible extended + * attributes, such as those in system or security namespaces. This interface + * should not be used for internally used attributes (consider xfs_attr.c). + */ + /* * Get permission to use log-assisted atomic exchange of file extents. * @@ -241,6 +247,9 @@ xfs_xattr_put_listent( ASSERT(context->count >= 0); + if (flags & XFS_ATTR_INTERNAL_MASK) + return; + if (flags & XFS_ATTR_ROOT) { #ifdef CONFIG_XFS_POSIX_ACL if (namelen == SGI_ACL_FILE_SIZE &&
The Merkle tree blocks and descriptor are stored in the extended attributes of the inode. Add new attribute type for fs-verity metadata. Add XFS_ATTR_INTERNAL_MASK to skip parent pointer and fs-verity attributes as those are only for internal use. While we're at it add a few comments in relevant places that internally visible attributes are not suppose to be handled via interface defined in xfs_xattr.c. Signed-off-by: Andrey Albershteyn <aalbersh@redhat.com> --- fs/xfs/libxfs/xfs_da_format.h | 10 +++++++++- fs/xfs/libxfs/xfs_log_format.h | 1 + fs/xfs/xfs_ioctl.c | 5 +++++ fs/xfs/xfs_trace.h | 1 + fs/xfs/xfs_xattr.c | 9 +++++++++ 5 files changed, 25 insertions(+), 1 deletion(-)