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/*
* Copyright (c) 2007 Vladimir Nadvornik <nadvornik@suse.cz>
* Copyright (c) 2007-2021 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2015 Bart Van Assche <bart.vanassche@sandisk.com>
* Copyright (c) 2021-2023 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "defs.h"
#ifdef HAVE_SCSI_SG_H
# include DEF_MPERS_TYPE(struct_sg_io_hdr)
# include <scsi/sg.h>
typedef struct sg_io_hdr struct_sg_io_hdr;
#endif /* HAVE_SCSI_SG_H */
#include MPERS_DEFS
#include "xlat/sg_io_info.h"
#ifdef HAVE_SCSI_SG_H
# include "xlat/sg_io_dxfer_direction.h"
# include "xlat/sg_io_flags.h"
static void
print_sg_io_buffer(struct tcb *const tcp, const kernel_ulong_t addr,
const unsigned int data_size, const unsigned int iovec_count)
{
if (iovec_count) {
tprint_iov_upto(tcp, iovec_count, addr, data_size,
iov_decode_str, NULL);
} else {
printstr_ex(tcp, addr, data_size, QUOTE_FORCE_HEX);
}
}
# define PRINT_FIELD_SG_IO_BUFFER(where_, field_, size_, count_, tcp_) \
do { \
tprints_field_name(#field_); \
print_sg_io_buffer((tcp_), (mpers_ptr_t)((where_).field_), \
(size_), (count_)); \
} while (0)
static int
decode_request(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_sg_io_hdr sg_io;
static const size_t skip_iid =
offsetof(struct_sg_io_hdr, dxfer_direction);
tprint_struct_begin();
tprints_field_name("interface_id");
tprints_string("'S'");
tprint_struct_next();
if (umoven_or_printaddr(tcp, arg + skip_iid, sizeof(sg_io) - skip_iid,
&sg_io.dxfer_direction)) {
tprint_struct_end();
return RVAL_IOCTL_DECODED;
}
PRINT_FIELD_XVAL(sg_io, dxfer_direction, sg_io_dxfer_direction,
"SG_DXFER_???");
tprint_struct_next();
PRINT_FIELD_U(sg_io, cmd_len);
tprint_struct_next();
PRINT_FIELD_SG_IO_BUFFER(sg_io, cmdp, sg_io.cmd_len, 0, tcp);
tprint_struct_next();
PRINT_FIELD_U(sg_io, mx_sb_len);
tprint_struct_next();
PRINT_FIELD_U(sg_io, iovec_count);
tprint_struct_next();
PRINT_FIELD_U(sg_io, dxfer_len);
tprint_struct_next();
PRINT_FIELD_U(sg_io, timeout);
tprint_struct_next();
PRINT_FIELD_FLAGS(sg_io, flags, sg_io_flags, "SG_FLAG_???");
if (sg_io.dxfer_direction == SG_DXFER_TO_DEV ||
sg_io.dxfer_direction == SG_DXFER_TO_FROM_DEV) {
tprint_struct_next();
PRINT_FIELD_SG_IO_BUFFER(sg_io, dxferp, sg_io.dxfer_len, sg_io.iovec_count, tcp);
}
struct_sg_io_hdr *entering_sg_io = xobjdup(&sg_io);
entering_sg_io->interface_id = (unsigned char) 'S';
set_tcb_priv_data(tcp, entering_sg_io, free);
return 0;
}
static int
decode_response(struct tcb *const tcp, const kernel_ulong_t arg)
{
struct_sg_io_hdr *entering_sg_io = get_tcb_priv_data(tcp);
struct_sg_io_hdr sg_io;
if (umove(tcp, arg, &sg_io) < 0) {
/* print i/o fields fetched on entering syscall */
if (entering_sg_io->dxfer_direction == SG_DXFER_FROM_DEV) {
tprint_struct_next();
PRINT_FIELD_PTR(*entering_sg_io, dxferp);
}
tprint_struct_next();
PRINT_FIELD_PTR(*entering_sg_io, sbp);
return RVAL_IOCTL_DECODED;
}
if (sg_io.interface_id != entering_sg_io->interface_id) {
tprint_value_changed();
PRINT_FIELD_U(sg_io, interface_id);
return RVAL_IOCTL_DECODED;
}
if (sg_io.dxfer_direction == SG_DXFER_FROM_DEV ||
sg_io.dxfer_direction == SG_DXFER_TO_FROM_DEV) {
uint32_t din_len = sg_io.dxfer_len;
bool print_buffer = false;
if (sg_io.resid > 0 && (unsigned int) sg_io.resid <= din_len)
din_len -= sg_io.resid;
if (sg_io.dxfer_direction == SG_DXFER_FROM_DEV) {
tprint_struct_next();
print_buffer = true;
} else if (din_len) {
tprint_value_changed();
print_buffer = true;
}
if (print_buffer) {
PRINT_FIELD_SG_IO_BUFFER(sg_io, dxferp, din_len,
sg_io.iovec_count, tcp);
}
}
tprint_struct_next();
PRINT_FIELD_X(sg_io, status);
tprint_struct_next();
PRINT_FIELD_X(sg_io, masked_status);
tprint_struct_next();
PRINT_FIELD_X(sg_io, msg_status);
tprint_struct_next();
PRINT_FIELD_U(sg_io, sb_len_wr);
tprint_struct_next();
PRINT_FIELD_SG_IO_BUFFER(sg_io, sbp, sg_io.sb_len_wr, 0, tcp);
tprint_struct_next();
PRINT_FIELD_X(sg_io, host_status);
tprint_struct_next();
PRINT_FIELD_X(sg_io, driver_status);
tprint_struct_next();
PRINT_FIELD_D(sg_io, resid);
tprint_struct_next();
PRINT_FIELD_U(sg_io, duration);
tprint_struct_next();
PRINT_FIELD_FLAGS(sg_io, info, sg_io_info, "SG_INFO_???");
return RVAL_IOCTL_DECODED;
}
#else /* !HAVE_SCSI_SG_H */
static int
decode_request(struct tcb *const tcp, const kernel_ulong_t arg)
{
tprint_struct_begin();
tprints_field_name("interface_id");
tprints_string("'S'");
tprint_struct_next();
tprint_more_data_follows();
tprint_struct_end();
return RVAL_IOCTL_DECODED;
}
static int
decode_response(struct tcb *const tcp, const kernel_ulong_t arg)
{
return 0;
}
#endif
MPERS_PRINTER_DECL(int, decode_sg_io_v3,
struct tcb *const tcp, const kernel_ulong_t arg)
{
return entering(tcp) ? decode_request(tcp, arg)
: decode_response(tcp, arg);
}
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