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/*
* Copyright (c) 2019-2021 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#include <linux/fcntl.h>
#include <linux/mount.h>
#include "xlat/mount_setattr_flags.h"
#include "xlat/mount_attr_attr.h"
#include "xlat/mount_attr_propagation.h"
static void
print_mount_attr(struct tcb *const tcp,
const kernel_ulong_t addr,
const kernel_ulong_t size)
{
struct mount_attr attr;
if (size < MOUNT_ATTR_SIZE_VER0) {
printaddr(addr);
return;
}
if (umoven_or_printaddr(tcp, addr, MIN(sizeof(attr), size), &attr))
return;
tprint_struct_begin();
PRINT_FIELD_FLAGS(attr, attr_set, mount_attr_attr, "MOUNT_ATTR_???");
tprint_struct_next();
PRINT_FIELD_FLAGS(attr, attr_clr, mount_attr_attr, "MOUNT_ATTR_???");
tprint_struct_next();
PRINT_FIELD_XVAL(attr, propagation, mount_attr_propagation, "MS_???");
tprint_struct_next();
if (attr.userns_fd > INT_MAX ||
!((attr.attr_set | attr.attr_clr) & MOUNT_ATTR_IDMAP)) {
PRINT_FIELD_U(attr, userns_fd);
} else {
PRINT_FIELD_FD(attr, userns_fd, tcp);
}
if (size > sizeof(attr)) {
print_nonzero_bytes(tcp, tprint_struct_next, addr, sizeof(attr),
MIN(size, get_pagesize()), QUOTE_FORCE_HEX);
}
tprint_struct_end();
}
SYS_FUNC(mount_setattr)
{
/* dirfd */
print_dirfd(tcp, tcp->u_arg[0]);
tprint_arg_next();
/* pathname */
printpath(tcp, tcp->u_arg[1]);
tprint_arg_next();
/* flags */
printflags(mount_setattr_flags, tcp->u_arg[2], "AT_???");
tprint_arg_next();
/* uattr */
print_mount_attr(tcp, tcp->u_arg[3], tcp->u_arg[4]);
tprint_arg_next();
/* usize */
PRINT_VAL_U(tcp->u_arg[4]);
return RVAL_DECODED | RVAL_FD;
}
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