[PATCH v5 24/39] richacl: Set the other permissions to the other mask
From: Andreas Gruenbacher <hidden>
Date: 2015-07-22 13:03:14
Also in:
linux-fsdevel, linux-nfs, lkml
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
From: Andreas Gruenbacher <agruenba@redhat.com> Change the acl so that everyone@ is granted the permissions set in the other mask. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/richacl_compat.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+)
diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c
index db33b63..438859c 100644
--- a/fs/richacl_compat.c
+++ b/fs/richacl_compat.c@@ -441,3 +441,36 @@ richacl_set_owner_permissions(struct richacl_alloc *alloc) } return 0; } + +/** + * richacl_set_other_permissions - set the other permissions to the other mask + * + * Change the acl so that everyone@ is granted the permissions set in the other + * mask. This leaves at most one efective everyone@ allow entry at the end of + * the acl. + */ +static int +richacl_set_other_permissions(struct richacl_alloc *alloc) +{ + struct richacl *acl = alloc->acl; + unsigned int x = RICHACE_POSIX_ALWAYS_ALLOWED; + unsigned int other_mask = acl->a_other_mask & ~x; + struct richace *ace = acl->a_entries + acl->a_count - 1; + + if (!other_mask) + return 0; + + if (acl->a_count == 0 || + !richace_is_everyone(ace) || + richace_is_inherit_only(ace)) { + ace++; + if (richacl_insert_entry(alloc, &ace)) + return -1; + ace->e_type = RICHACE_ACCESS_ALLOWED_ACE_TYPE; + ace->e_flags = RICHACE_SPECIAL_WHO; + ace->e_mask = other_mask; + ace->e_id.special = RICHACE_EVERYONE_SPECIAL_ID; + } else + richace_change_mask(alloc, &ace, other_mask); + return 0; +}
--
2.4.3