Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

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

1 files changed, 194 insertions, 0 deletions

diff --git a/source3/modules/vfs_crossrename.c b/source3/modules/vfs_crossrename.c
new file mode 100644
index 0000000..042144b
--- /dev/null
+++ b/source3/modules/vfs_crossrename.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) Björn Jacke 2010
+ *
+ * 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 "smbd/smbd.h"
+#include "system/filesys.h"
+#include "transfer_file.h"
+#include "smbprofile.h"
+
+#define MODULE "crossrename"
+static off_t module_sizelimit;
+
+static int crossrename_connect(
+                struct vfs_handle_struct *  handle,
+                const char *                service,
+                const char *                user)
+{
+	int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
+
+	if (ret < 0) {
+		return ret;
+	}
+
+	module_sizelimit = (off_t) lp_parm_int(SNUM(handle->conn),
+					MODULE, "sizelimit", 20);
+	/* convert from MiB to byte: */
+	module_sizelimit *= 1048576;
+
+	return 0;
+}
+
+/*********************************************************
+ For rename across filesystems initial Patch from Warren Birnbaum
+ <warrenb@hpcvscdp.cv.hp.com>
+**********************************************************/
+
+static NTSTATUS copy_reg(vfs_handle_struct *handle,
+			 struct files_struct *srcfsp,
+			 const struct smb_filename *source,
+			 struct files_struct *dstfsp,
+			 const struct smb_filename *dest)
+{
+	NTSTATUS status;
+	struct smb_filename *full_fname_src = NULL;
+	struct smb_filename *full_fname_dst = NULL;
+	int ret;
+
+	if (!VALID_STAT(source->st)) {
+		status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
+		goto out;
+	}
+	if (!S_ISREG(source->st.st_ex_mode)) {
+		status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
+		goto out;
+	}
+
+	if (source->st.st_ex_size > module_sizelimit) {
+		DBG_INFO("%s: size of %s larger than sizelimit (%lld > %lld), "
+			 "rename prohibited\n",
+			MODULE,
+			source->base_name,
+			(long long)source->st.st_ex_size,
+			(long long)module_sizelimit);
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto out;
+	}
+
+	full_fname_src = full_path_from_dirfsp_atname(talloc_tos(),
+						      srcfsp,
+						      source);
+	if (full_fname_src == NULL) {
+		status = NT_STATUS_NO_MEMORY;
+		goto out;
+	}
+	full_fname_dst = full_path_from_dirfsp_atname(talloc_tos(),
+						      dstfsp,
+						      dest);
+	if (full_fname_dst == NULL) {
+		status = NT_STATUS_NO_MEMORY;
+		goto out;
+	}
+
+	ret = SMB_VFS_NEXT_UNLINKAT(handle,
+				    dstfsp,
+				    dest,
+				    0);
+	if (ret == -1) {
+		status = map_nt_error_from_unix(errno);
+		goto out;
+	}
+
+	/*
+	 * copy_internals() takes attribute values from the NTrename call.
+	 *
+	 * From MS-CIFS:
+	 *
+	 * "If the attribute is 0x0000, then only normal files are renamed.
+	 * If the system file or hidden attributes are specified, then the
+	 * rename is inclusive of both special types."
+	 */
+	status = copy_internals(talloc_tos(),
+				handle->conn,
+				NULL,
+				srcfsp, /* src_dirfsp */
+				full_fname_src,
+				dstfsp, /* dst_dirfsp */
+				full_fname_dst,
+				FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM);
+	if (!NT_STATUS_IS_OK(status)) {
+		goto out;
+	}
+
+	ret = SMB_VFS_NEXT_UNLINKAT(handle,
+				    srcfsp,
+				    source,
+				    0);
+	if (ret == -1) {
+		status = map_nt_error_from_unix(errno);
+		goto out;
+	}
+
+  out:
+
+	TALLOC_FREE(full_fname_src);
+	TALLOC_FREE(full_fname_dst);
+	return status;
+}
+
+static int crossrename_renameat(vfs_handle_struct *handle,
+			files_struct *srcfsp,
+			const struct smb_filename *smb_fname_src,
+			files_struct *dstfsp,
+			const struct smb_filename *smb_fname_dst)
+{
+	int result = -1;
+
+	START_PROFILE(syscall_renameat);
+
+	if (smb_fname_src->stream_name || smb_fname_dst->stream_name) {
+		errno = ENOENT;
+		goto out;
+	}
+
+	result = SMB_VFS_NEXT_RENAMEAT(handle,
+				       srcfsp,
+				       smb_fname_src,
+				       dstfsp,
+				       smb_fname_dst);
+
+	if ((result == -1) && (errno == EXDEV)) {
+		/* Rename across filesystems needed. */
+		NTSTATUS status = copy_reg(handle,
+					   srcfsp,
+					   smb_fname_src,
+					   dstfsp,
+					   smb_fname_dst);
+		if (!NT_STATUS_IS_OK(status)) {
+			errno = map_errno_from_nt_status(status);
+			result = -1;
+		}
+	}
+
+ out:
+	END_PROFILE(syscall_renameat);
+	return result;
+}
+
+
+static struct vfs_fn_pointers vfs_crossrename_fns = {
+	.connect_fn = crossrename_connect,
+	.renameat_fn = crossrename_renameat
+};
+
+static_decl_vfs;
+NTSTATUS vfs_crossrename_init(TALLOC_CTX *ctx)
+{
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, MODULE,
+				&vfs_crossrename_fns);
+}
+