[PATCH v2 3/5] landlock_add_rule.2: Document missing reason for EINVAL

["Günther Noack" <gnoack@google.com>]

This documents a missing reason for why EINVAL might be returned.
The documented behavior exists since the first version of Landlock.

Reviewed-by: Mickaël Salaün <mic@digikod.net>
Signed-off-by: Günther Noack <gnoack@google.com>
---
 man/man2/landlock_add_rule.2 | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/man/man2/landlock_add_rule.2 b/man/man2/landlock_add_rule.2
index fa0b1f109..530b45947 100644
--- a/man/man2/landlock_add_rule.2
+++ b/man/man2/landlock_add_rule.2
@@ -101,6 +101,16 @@ The rule accesses are inconsistent (i.e.,
 .I rule_attr\->allowed_access
 is not a subset of the ruleset handled accesses).
 .TP
+.B EINVAL
+In
+.IR "struct landlock_path_beneath_attr" ,
+the rule accesses are not applicable to the file
+(i.e., some access rights in
+.I rule_attr\->allowed_access
+are only applicable to directories, but
+.I rule_attr\->parent_fd
+does not refer to a directory).
+.TP
 .B ENOMSG
 Empty accesses (i.e.,
 .I rule_attr\->allowed_access
-- 
2.45.2.1089.g2a221341d9-goog