Change the acl so that everyone@ is granted the permissions set in the
other mask.
Signed-off-by: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
---
fs/richacl_compat.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c
index 14a1b4b..30bdc95 100644
--- a/fs/richacl_compat.c
+++ b/fs/richacl_compat.c
@@ -459,3 +459,38 @@ 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 &&
+ (acl->a_flags & RICHACL_WRITE_THROUGH) &&
+ (acl->a_flags & RICHACL_MASKED)))
+ 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
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