Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 199 insertions, 0 deletions

diff --git a/source4/ntvfs/posix/pvfs_acl_nfs4.c b/source4/ntvfs/posix/pvfs_acl_nfs4.c
new file mode 100644
index 0000000..fc6c230
--- /dev/null
+++ b/source4/ntvfs/posix/pvfs_acl_nfs4.c
@@ -0,0 +1,199 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   POSIX NTVFS backend - NT ACLs mapped to NFS4 ACLs, as per
+   http://www.suse.de/~agruen/nfs4acl/
+
+   Copyright (C) Andrew Tridgell 2006
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "vfs_posix.h"
+#include "../lib/util/unix_privs.h"
+#include "librpc/gen_ndr/ndr_nfs4acl.h"
+#include "libcli/security/security.h"
+
+NTSTATUS pvfs_acl_nfs4_init(TALLOC_CTX *);
+
+#define ACE4_IDENTIFIER_GROUP 0x40
+
+/*
+  load the current ACL from system.nfs4acl
+*/
+static NTSTATUS pvfs_acl_load_nfs4(struct pvfs_state *pvfs, struct pvfs_filename *name, int fd,
+				   TALLOC_CTX *mem_ctx,
+				   struct security_descriptor **psd)
+{
+	NTSTATUS status;
+	struct nfs4acl *acl;
+	struct security_descriptor *sd;
+	int i, num_ids;
+	struct id_map *ids;
+
+	acl = talloc_zero(mem_ctx, struct nfs4acl);
+	NT_STATUS_HAVE_NO_MEMORY(acl);
+
+	status = pvfs_xattr_ndr_load(pvfs, mem_ctx, name->full_name, fd, 
+				     NFS4ACL_NDR_XATTR_NAME,
+				     acl, (void *) ndr_pull_nfs4acl);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(acl);
+		return status;
+	}
+
+	*psd = security_descriptor_initialise(mem_ctx);
+	NT_STATUS_HAVE_NO_MEMORY(*psd);
+
+	sd = *psd;
+
+	sd->type |= acl->a_flags;
+
+	/* the number of ids to map is the acl count plus uid and gid */
+	num_ids = acl->a_count +2;
+	ids = talloc_array(sd, struct id_map, num_ids);
+	NT_STATUS_HAVE_NO_MEMORY(ids);
+
+	ids[0].xid.id = name->st.st_uid;
+	ids[0].xid.type = ID_TYPE_UID;
+	ids[0].sid = NULL;
+	ids[0].status = ID_UNKNOWN;
+
+	ids[1].xid.id = name->st.st_gid;
+	ids[1].xid.type = ID_TYPE_GID;
+	ids[1].sid = NULL;
+	ids[1].status = ID_UNKNOWN;
+
+	for (i=0;i<acl->a_count;i++) {
+		struct nfs4ace *a = &acl->ace[i];
+		ids[i+2].xid.id = a->e_id;
+		if (a->e_flags & ACE4_IDENTIFIER_GROUP) {
+			ids[i+2].xid.type = ID_TYPE_GID;
+		} else {
+			ids[i+2].xid.type = ID_TYPE_UID;
+		}
+		ids[i+2].sid = NULL;
+		ids[i+2].status = ID_UNKNOWN;
+	}
+
+	/* Allocate memory for the sids from the security descriptor to be on
+	 * the safe side. */
+	status = wbc_xids_to_sids(ids, num_ids);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	sd->owner_sid = talloc_steal(sd, ids[0].sid);
+	sd->group_sid = talloc_steal(sd, ids[1].sid);
+
+	for (i=0;i<acl->a_count;i++) {
+		struct nfs4ace *a = &acl->ace[i];
+		struct security_ace ace;
+		ace.type = a->e_type;
+		ace.flags = a->e_flags;
+		ace.access_mask = a->e_mask;
+		ace.trustee = *ids[i+2].sid;
+		security_descriptor_dacl_add(sd, &ace);
+	}
+
+	return NT_STATUS_OK;
+}
+
+/*
+  save the acl for a file into system.nfs4acl
+*/
+static NTSTATUS pvfs_acl_save_nfs4(struct pvfs_state *pvfs, struct pvfs_filename *name, int fd,
+				   struct security_descriptor *sd)
+{
+	NTSTATUS status;
+	void *privs;
+	struct nfs4acl acl;
+	int i;
+	TALLOC_CTX *tmp_ctx;
+	struct id_map *ids;
+
+	tmp_ctx = talloc_new(pvfs);
+	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);
+
+	acl.a_version = 0;
+	acl.a_flags   = sd->type;
+	acl.a_count   = sd->dacl?sd->dacl->num_aces:0;
+	acl.a_owner_mask = 0;
+	acl.a_group_mask = 0;
+	acl.a_other_mask = 0;
+
+	acl.ace = talloc_array(tmp_ctx, struct nfs4ace, acl.a_count);
+	if (!acl.ace) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	ids = talloc_array(tmp_ctx, struct id_map, acl.a_count);
+	if (ids == NULL) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	for (i=0;i<acl.a_count;i++) {
+		struct security_ace *ace = &sd->dacl->aces[i];
+		ZERO_STRUCT(ids[i].xid);
+		ids[i].sid = dom_sid_dup(ids, &ace->trustee);
+		if (ids[i].sid == NULL) {
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+		ids[i].status = ID_UNKNOWN;
+	}
+
+	status = wbc_sids_to_xids(ids, acl.a_count);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		return status;
+	}
+
+	for (i=0;i<acl.a_count;i++) {
+		struct nfs4ace *a = &acl.ace[i];
+		struct security_ace *ace = &sd->dacl->aces[i];
+		a->e_type  = ace->type;
+		a->e_flags = ace->flags;
+		a->e_mask  = ace->access_mask;
+		if (ids[i].xid.type != ID_TYPE_UID) {
+			a->e_flags |= ACE4_IDENTIFIER_GROUP;
+		}
+		a->e_id = ids[i].xid.id;
+		a->e_who   = "";
+	}
+
+	privs = root_privileges();
+	status = pvfs_xattr_ndr_save(pvfs, name->full_name, fd, 
+				     NFS4ACL_NDR_XATTR_NAME,
+				     &acl, (void *) ndr_push_nfs4acl);
+	talloc_free(privs);
+
+	talloc_free(tmp_ctx);
+	return status;
+}
+
+
+/*
+  initialise pvfs acl NFS4 backend
+*/
+NTSTATUS pvfs_acl_nfs4_init(TALLOC_CTX *ctx)
+{
+	struct pvfs_acl_ops ops = {
+		.name = "nfs4acl",
+		.acl_load = pvfs_acl_load_nfs4,
+		.acl_save = pvfs_acl_save_nfs4
+	};
+	return pvfs_acl_register(ctx, &ops);
+}