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/*
* Copyright (c) 2007 Vladimir Nadvornik <nadvornik@suse.cz>
* Copyright (c) 2007-2017 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015 Bart Van Assche <bart.vanassche@sandisk.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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 "print_fields.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, IOV_DECODE_STR,
data_size);
} else {
printstr_ex(tcp, addr, data_size, QUOTE_FORCE_HEX);
}
}
#define PRINT_FIELD_SG_IO_BUFFER(prefix_, where_, field_, size_, count_, tcp_) \
do { \
STRACE_PRINTF("%s%s=", (prefix_), #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);
tprints("{interface_id='S', ");
if (umoven_or_printaddr(tcp, arg + skip_iid, sizeof(sg_io) - skip_iid,
&sg_io.dxfer_direction)) {
tprints("}");
return RVAL_IOCTL_DECODED;
}
PRINT_FIELD_XVAL("", sg_io, dxfer_direction, sg_io_dxfer_direction,
"SG_DXFER_???");
PRINT_FIELD_U(", ", sg_io, cmd_len);
PRINT_FIELD_SG_IO_BUFFER(", ", sg_io, cmdp, sg_io.cmd_len, 0, tcp);
PRINT_FIELD_U(", ", sg_io, mx_sb_len);
PRINT_FIELD_U(", ", sg_io, iovec_count);
PRINT_FIELD_U(", ", sg_io, dxfer_len);
PRINT_FIELD_U(", ", sg_io, timeout);
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) {
PRINT_FIELD_SG_IO_BUFFER(", ", sg_io, dxferp, sg_io.dxfer_len, sg_io.iovec_count, tcp);
}
struct_sg_io_hdr *entering_sg_io = malloc(sizeof(*entering_sg_io));
if (entering_sg_io) {
memcpy(entering_sg_io, &sg_io, sizeof(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)
PRINT_FIELD_PTR(", ", *entering_sg_io, dxferp);
PRINT_FIELD_PTR(", ", *entering_sg_io, sbp);
return RVAL_IOCTL_DECODED;
}
if (sg_io.interface_id != entering_sg_io->interface_id) {
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;
const char *prefix = NULL;
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)
prefix = ", ";
else if (din_len)
prefix = " => ";
if (prefix) {
tprints(prefix);
PRINT_FIELD_SG_IO_BUFFER("", sg_io, dxferp, din_len,
sg_io.iovec_count, tcp);
}
}
PRINT_FIELD_X(", ", sg_io, status);
PRINT_FIELD_X(", ", sg_io, masked_status);
PRINT_FIELD_X(", ", sg_io, msg_status);
PRINT_FIELD_U(", ", sg_io, sb_len_wr);
PRINT_FIELD_SG_IO_BUFFER(", ", sg_io, sbp, sg_io.sb_len_wr, 0, tcp);
PRINT_FIELD_X(", ", sg_io, host_status);
PRINT_FIELD_X(", ", sg_io, driver_status);
PRINT_FIELD_D(", ", sg_io, resid);
PRINT_FIELD_U(", ", sg_io, duration);
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)
{
tprints("{interface_id='S', ...}");
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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