1 files changed, 158 insertions, 0 deletions
diff --git a/src/fs_0x94_ioctl.c b/src/fs_0x94_ioctl.c
new file mode 100644
index 000000000..e980d1761
--- /dev/null
+++ b/src/fs_0x94_ioctl.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2016 Jeff Mahoney <jeffm@suse.com>
+ * Copyright (c) 2016-2021 The strace developers.
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#include "defs.h"
+#include "types/fs_0x94.h"
+#define XLAT_MACROS_ONLY
+# include "xlat/fs_0x94_ioctl_cmds.h"
+#undef XLAT_MACROS_ONLY
+
+static void
+decode_file_clone_range(struct tcb *const tcp, const kernel_ulong_t arg)
+{
+	struct_file_clone_range range;
+
+	tprints(", ");
+	if (!umove_or_printaddr(tcp, arg, &range)) {
+		tprint_struct_begin();
+		PRINT_FIELD_FD(range, src_fd, tcp);
+		tprint_struct_next();
+		PRINT_FIELD_U(range, src_offset);
+		tprint_struct_next();
+		PRINT_FIELD_U(range, src_length);
+		tprint_struct_next();
+		PRINT_FIELD_U(range, dest_offset);
+		tprint_struct_end();
+	}
+}
+
+static bool
+print_file_dedupe_range_info(struct tcb *tcp, void *elem_buf,
+			     size_t elem_size, void *data)
+{
+	const struct_file_dedupe_range_info *info = elem_buf;
+	unsigned int *count = data;
+
+	if (count) {
+		if (*count == 0) {
+			tprint_more_data_follows();
+			return false;
+		}
+		--*count;
+	}
+
+	if (entering(tcp)) {
+		tprint_struct_begin();
+		PRINT_FIELD_FD(*info, dest_fd, tcp);
+		tprint_struct_next();
+		PRINT_FIELD_U(*info, dest_offset);
+	} else {
+		tprint_struct_begin();
+		PRINT_FIELD_U(*info, bytes_deduped);
+		tprint_struct_next();
+		PRINT_FIELD_D(*info, status);
+	}
+	tprint_struct_end();
+
+	return true;
+}
+
+static int
+decode_file_dedupe_range(struct tcb *const tcp, const kernel_ulong_t arg)
+{
+	struct_file_dedupe_range range;
+	struct_file_dedupe_range_info info;
+	unsigned int *limit = NULL;
+	unsigned int count = 2;
+	bool rc;
+
+	if (entering(tcp))
+		tprints(", ");
+	else if (syserror(tcp))
+		return RVAL_IOCTL_DECODED;
+	else
+		tprint_value_changed();
+
+	if (umove_or_printaddr(tcp, arg, &range))
+		return RVAL_IOCTL_DECODED;
+
+	tprint_struct_begin();
+
+	if (entering(tcp)) {
+		PRINT_FIELD_U(range, src_offset);
+		tprint_struct_next();
+		PRINT_FIELD_U(range, src_length);
+		tprint_struct_next();
+		PRINT_FIELD_U(range, dest_count);
+		tprints(", ");
+	}
+
+	tprints_field_name("info");
+
+	/* Limit how many elements we print in abbrev mode. */
+	if (abbrev(tcp) && range.dest_count > count)
+		limit = &count;
+
+	rc = print_array(tcp, arg + offsetof(typeof(range), info),
+			 range.dest_count, &info, sizeof(info),
+			 tfetch_mem,
+			 print_file_dedupe_range_info, limit);
+
+	tprint_struct_end();
+
+	if (!rc || exiting(tcp))
+		return RVAL_IOCTL_DECODED;
+
+	return 0;
+}
+
+static void
+decode_fslabel(struct tcb *const tcp, const kernel_ulong_t arg)
+{
+	fs_0x94_label_t label;
+
+	tprints(", ");
+	if (!umove_or_printaddr(tcp, arg, &label))
+		print_quoted_cstring(label, sizeof(label));
+}
+
+int
+fs_0x94_ioctl(struct tcb *const tcp, const unsigned int code,
+	      const kernel_ulong_t arg)
+{
+	switch (code) {
+	case FICLONE:	/* W */
+		tprintf(", %d", (int) arg);
+		break;
+
+	case FICLONERANGE:	/* W */
+		decode_file_clone_range(tcp, arg);
+		break;
+
+	case FIDEDUPERANGE:	/* WR */
+		return decode_file_dedupe_range(tcp, arg);
+
+	case FS_IOC_GETFSLABEL:	/* R */
+		if (entering(tcp))
+			return 0;
+		ATTRIBUTE_FALLTHROUGH;
+
+	case FS_IOC_SETFSLABEL:	/* W */
+		decode_fslabel(tcp, arg);
+		break;
+
+	default:
+#ifdef HAVE_LINUX_BTRFS_H
+		return btrfs_ioctl(tcp, code, arg);
+#else
+		return RVAL_DECODED;
+#endif
+	};
+
+	return RVAL_IOCTL_DECODED;
+}