From d4b16573966d2b5e45a3a83d75fe0827ce9dc4be Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Sat, 1 Jan 2005 04:25:46 +0000
Subject: [PATCH] r4464: added pvfs backend support for the special
 CREATOR_OWNER and CREATOR_GROUP inheritance rules (This used to be commit
 0a29fb45c310b4b8c348d187b8ff1833deaac6c3)

---
 source4/ntvfs/posix/pvfs_acl.c  | 38 ++++++++++++++++++++++++++++++++-
 source4/ntvfs/posix/vfs_posix.c |  4 ++++
 source4/ntvfs/posix/vfs_posix.h |  6 ++++++
 3 files changed, 47 insertions(+), 1 deletion(-)

diff --git a/source4/ntvfs/posix/pvfs_acl.c b/source4/ntvfs/posix/pvfs_acl.c
index ce5f3a248b2..ba5fa96b076 100644
--- a/source4/ntvfs/posix/pvfs_acl.c
+++ b/source4/ntvfs/posix/pvfs_acl.c
@@ -470,11 +470,15 @@ static NTSTATUS pvfs_acl_inherit_aces(struct pvfs_state *pvfs,
 	for (i=0;i<parent_sd->dacl->num_aces;i++) {
 		struct security_ace ace = parent_sd->dacl->aces[i];
 		NTSTATUS status;
+		const struct dom_sid *creator = NULL, *new_id = NULL;
+		uint32_t orig_flags;
 
 		if (!pvfs_inheritable_ace(pvfs, &ace, container)) {
 			continue;
 		}
 
+		orig_flags = ace.flags;
+
 		/* see the RAW-ACLS inheritance test for details on these rules */
 		if (!container) {
 			ace.flags = 0;
@@ -489,7 +493,39 @@ static NTSTATUS pvfs_acl_inherit_aces(struct pvfs_state *pvfs,
 			}
 		}
 
-		status = security_descriptor_dacl_add(sd, &ace);
+		/* the CREATOR sids are special when inherited */
+		if (dom_sid_equal(&ace.trustee, pvfs->sid_cache.creator_owner)) {
+			creator = pvfs->sid_cache.creator_owner;
+			new_id = sd->owner_sid;
+		} else if (dom_sid_equal(&ace.trustee, pvfs->sid_cache.creator_group)) {
+			creator = pvfs->sid_cache.creator_group;
+			new_id = sd->group_sid;
+		} else {
+			new_id = &ace.trustee;
+		}
+
+		if (creator && container && 
+		    (ace.flags & SEC_ACE_FLAG_CONTAINER_INHERIT)) {
+			uint32_t flags = ace.flags;
+
+			ace.trustee = *new_id;
+			ace.flags = 0;
+			status = security_descriptor_dacl_add(sd, &ace);
+			if (!NT_STATUS_IS_OK(status)) {
+				return status;
+			}
+
+			ace.trustee = *creator;
+			ace.flags = flags | SEC_ACE_FLAG_INHERIT_ONLY;
+			status = security_descriptor_dacl_add(sd, &ace);
+		} else if (container && 
+			   !(orig_flags & SEC_ACE_FLAG_NO_PROPAGATE_INHERIT)) {
+			status = security_descriptor_dacl_add(sd, &ace);
+		} else {
+			ace.trustee = *new_id;
+			status = security_descriptor_dacl_add(sd, &ace);
+		}
+
 		if (!NT_STATUS_IS_OK(status)) {
 			return status;
 		}
diff --git a/source4/ntvfs/posix/vfs_posix.c b/source4/ntvfs/posix/vfs_posix.c
index eecc379064a..e5bdc3faae4 100644
--- a/source4/ntvfs/posix/vfs_posix.c
+++ b/source4/ntvfs/posix/vfs_posix.c
@@ -26,6 +26,7 @@
 
 #include "includes.h"
 #include "vfs_posix.h"
+#include "librpc/gen_ndr/ndr_security.h"
 
 
 /*
@@ -82,6 +83,9 @@ static void pvfs_setup_options(struct pvfs_state *pvfs)
 	if (pvfs->flags & PVFS_FLAG_XATTR_ENABLE) {
 		pvfs->fs_attribs |= FS_ATTR_PERSISTANT_ACLS;
 	}
+
+	pvfs->sid_cache.creator_owner = dom_sid_parse_talloc(pvfs, SID_CREATOR_OWNER);
+	pvfs->sid_cache.creator_group = dom_sid_parse_talloc(pvfs, SID_CREATOR_GROUP);
 }
 
 
diff --git a/source4/ntvfs/posix/vfs_posix.h b/source4/ntvfs/posix/vfs_posix.h
index e80790f6fa1..f7bf19c3dc1 100644
--- a/source4/ntvfs/posix/vfs_posix.h
+++ b/source4/ntvfs/posix/vfs_posix.h
@@ -60,6 +60,12 @@ struct pvfs_state {
 
 	/* if posix:eadb is set, then this gets setup */
 	struct tdb_wrap *ea_db;
+
+	/* used to accelerate acl mapping */
+	struct {
+		const struct dom_sid *creator_owner;
+		const struct dom_sid *creator_group;		
+	} sid_cache;
 };
 
 /* this is the basic information needed about a file from the filesystem */
-- 
2.34.1