wmi-1.3.16 from opsview.com

2019-02-16 00:16:52 +01:00
parent 163fdd3d1b
commit 17b3af2911
2146 changed files with 678824 additions and 0 deletions
@@ -0,0 +1,233 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   POSIX NTVFS backend - xattr support using a tdb
+
+   Copyright (C) Andrew Tridgell 2004
+
+   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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "vfs_posix.h"
+#include "lib/tdb/include/tdb.h"
+#include "db_wrap.h"
+
+#define XATTR_LIST_ATTR ".xattr_list"
+
+/*
+  we need to maintain a list of attributes on each file, so that unlink
+  can automatically clean them up
+*/
+static NTSTATUS xattr_tdb_add_list(struct pvfs_state *pvfs, const char *attr_name, 
+				   const char *fname, int fd)
+{
+	DATA_BLOB blob;
+	TALLOC_CTX *mem_ctx;
+	const char *s;
+	NTSTATUS status;
+	size_t len;
+
+	if (strcmp(attr_name, XATTR_LIST_ATTR) == 0) {
+		return NT_STATUS_OK;
+	}
+
+	mem_ctx = talloc_new(pvfs);
+
+	status = pull_xattr_blob_tdb(pvfs, mem_ctx, XATTR_LIST_ATTR, 
+				     fname, fd, 100, &blob);
+	if (!NT_STATUS_IS_OK(status)) {
+		blob = data_blob(NULL, 0);
+	}
+
+	for (s=(const char *)blob.data; s < (const char *)(blob.data+blob.length); s += strlen(s) + 1) {
+		if (strcmp(attr_name, s) == 0) {
+			talloc_free(mem_ctx);
+			return NT_STATUS_OK;
+		}
+	}
+
+	len = strlen(attr_name) + 1;
+
+	blob.data = talloc_realloc(mem_ctx, blob.data, uint8_t, blob.length + len);
+	if (blob.data == NULL) {
+		talloc_free(mem_ctx);
+		return NT_STATUS_NO_MEMORY;		
+	}
+	memcpy(blob.data + blob.length, attr_name, len);
+	blob.length += len;
+
+	status = push_xattr_blob_tdb(pvfs, XATTR_LIST_ATTR, fname, fd, &blob);
+	talloc_free(mem_ctx);
+
+	return status;
+}
+
+/*
+  form a key for using in the ea_db
+*/
+static NTSTATUS get_ea_db_key(TALLOC_CTX *mem_ctx,
+			      const char *attr_name,
+			      const char *fname, int fd, 
+			      TDB_DATA *key)
+{
+	struct stat st;
+	size_t len = strlen(attr_name);
+
+	if (fd == -1) {
+		if (stat(fname, &st) == -1) {
+			return NT_STATUS_NOT_FOUND;
+		}
+	} else {
+		if (fstat(fd, &st) == -1) {
+			return NT_STATUS_NOT_FOUND;
+		}
+	}
+
+	key->dptr = talloc_array(mem_ctx, uint8_t, 16 + len);
+	if (key->dptr == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+	key->dsize = 16 + len;
+
+	SBVAL(key->dptr, 0, st.st_dev);
+	SBVAL(key->dptr, 8, st.st_ino);
+	memcpy(key->dptr+16, attr_name, len);
+	
+	return NT_STATUS_OK;
+}
+
+/*
+  pull a xattr as a blob, using the ea_db tdb
+*/
+NTSTATUS pull_xattr_blob_tdb(struct pvfs_state *pvfs,
+			     TALLOC_CTX *mem_ctx,
+			     const char *attr_name, 
+			     const char *fname, 
+			     int fd, 
+			     size_t estimated_size,
+			     DATA_BLOB *blob)
+{
+	TDB_DATA tkey, tdata;
+	NTSTATUS status;
+
+	status = get_ea_db_key(mem_ctx, attr_name, fname, fd, &tkey);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+
+	tdata = tdb_fetch(pvfs->ea_db->tdb, tkey);
+	if (tdata.dptr == NULL) {
+		return NT_STATUS_NOT_FOUND;
+	}
+
+	*blob = data_blob_talloc(mem_ctx, tdata.dptr, tdata.dsize);
+	free(tdata.dptr);
+	if (blob->data == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	return NT_STATUS_OK;	
+}
+
+/*
+  push a xattr as a blob, using ea_db
+*/
+NTSTATUS push_xattr_blob_tdb(struct pvfs_state *pvfs,
+			     const char *attr_name, 
+			     const char *fname, 
+			     int fd, 
+			     const DATA_BLOB *blob)
+{
+	TDB_DATA tkey, tdata;
+	NTSTATUS status;
+
+	status = get_ea_db_key(pvfs, attr_name, fname, fd, &tkey);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+	
+	tdata.dptr = blob->data;
+	tdata.dsize = blob->length;
+
+	if (tdb_chainlock(pvfs->ea_db->tdb, tkey) != 0) {
+		talloc_free(tkey.dptr);
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	status = xattr_tdb_add_list(pvfs, attr_name, fname, fd);
+	if (!NT_STATUS_IS_OK(status)) {
+		goto done;
+	}
+
+	if (tdb_store(pvfs->ea_db->tdb, tkey, tdata, TDB_REPLACE) == -1) {
+		status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+done:
+	tdb_chainunlock(pvfs->ea_db->tdb, tkey);
+	talloc_free(tkey.dptr);
+	return status;	
+}
+
+
+/*
+  delete a xattr
+*/
+NTSTATUS delete_xattr_tdb(struct pvfs_state *pvfs, const char *attr_name, 
+			  const char *fname, int fd)
+{
+	TDB_DATA tkey;
+	NTSTATUS status;
+
+	status = get_ea_db_key(NULL, attr_name, fname, fd, &tkey);
+	if (!NT_STATUS_IS_OK(status)) {
+		return status;
+	}
+	
+	if (tdb_delete(pvfs->ea_db->tdb, tkey) == -1) {
+		talloc_free(tkey.dptr);
+		return NT_STATUS_INTERNAL_DB_CORRUPTION;
+	}
+
+	talloc_free(tkey.dptr);
+	return NT_STATUS_OK;	
+}
+
+
+
+/*
+  delete all xattrs for a file
+*/
+NTSTATUS unlink_xattr_tdb(struct pvfs_state *pvfs, const char *fname)
+{
+	TALLOC_CTX *mem_ctx = talloc_new(pvfs);
+	DATA_BLOB blob;
+	const char *s;
+	NTSTATUS status;
+
+	status = pull_xattr_blob_tdb(pvfs, mem_ctx, XATTR_LIST_ATTR, 
+				     fname, -1, 100, &blob);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(mem_ctx);
+		return NT_STATUS_OK;
+	}
+
+	for (s=(const char *)blob.data; s < (const char *)(blob.data+blob.length); s += strlen(s) + 1) {
+		delete_xattr_tdb(pvfs, s, fname, -1);
+	}
+
+	return delete_xattr_tdb(pvfs, XATTR_LIST_ATTR, fname, -1);
+}