blob: a07d8eb2fcc3912d6af27a9232f702a8e0a082e5 [file] [log] [blame]
/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 1999-2018 The strace developers.
* 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"
#include "print_fields.h"
#include <linux/aio_abi.h>
#include "xlat/aio_cmds.h"
SYS_FUNC(io_setup)
{
if (entering(tcp))
tprintf("%u, ", (unsigned int) tcp->u_arg[0]);
else
printnum_ptr(tcp, tcp->u_arg[1]);
return 0;
}
SYS_FUNC(io_destroy)
{
printaddr(tcp->u_arg[0]);
return RVAL_DECODED;
}
enum iocb_sub {
SUB_NONE, SUB_COMMON, SUB_VECTOR
};
static enum iocb_sub
tprint_lio_opcode(unsigned int cmd)
{
static const enum iocb_sub subs[] = {
[IOCB_CMD_PREAD] = SUB_COMMON,
[IOCB_CMD_PWRITE] = SUB_COMMON,
[IOCB_CMD_FSYNC] = SUB_NONE,
[IOCB_CMD_FDSYNC] = SUB_NONE,
[IOCB_CMD_PREADX] = SUB_NONE,
[IOCB_CMD_POLL] = SUB_NONE,
[IOCB_CMD_NOOP] = SUB_NONE,
[IOCB_CMD_PREADV] = SUB_VECTOR,
[IOCB_CMD_PWRITEV] = SUB_VECTOR,
};
printxval_indexn_ex(ARRSZ_PAIR(aio_cmds), cmd, "IOCB_CMD_???",
XLAT_STYLE_FMT_U);
return cmd < ARRAY_SIZE(subs) ? subs[cmd] : SUB_NONE;
}
static void
print_common_flags(struct tcb *tcp, const struct iocb *cb)
{
/* IOCB_FLAG_RESFD is available since v2.6.22-rc1~47 */
#ifdef IOCB_FLAG_RESFD
if (cb->aio_flags & IOCB_FLAG_RESFD)
PRINT_FIELD_FD(", ", *cb, aio_resfd, tcp);
if (cb->aio_flags & ~IOCB_FLAG_RESFD)
PRINT_FIELD_X(", ", *cb, aio_flags);
#endif
}
static bool
iocb_is_valid(const struct iocb *cb)
{
return cb->aio_buf == (unsigned long) cb->aio_buf &&
cb->aio_nbytes == (size_t) cb->aio_nbytes &&
(ssize_t) cb->aio_nbytes >= 0;
}
static enum iocb_sub
print_iocb_header(struct tcb *tcp, const struct iocb *cb)
{
enum iocb_sub sub;
if (cb->aio_data){
PRINT_FIELD_X("", *cb, aio_data);
tprints(", ");
}
if (cb->aio_key) {
PRINT_FIELD_U("", *cb, aio_key);
tprints(", ");
}
tprints("aio_lio_opcode=");
sub = tprint_lio_opcode(cb->aio_lio_opcode);
if (cb->aio_reqprio)
PRINT_FIELD_D(", ", *cb, aio_reqprio);
PRINT_FIELD_FD(", ", *cb, aio_fildes, tcp);
return sub;
}
static void
print_iocb(struct tcb *tcp, const struct iocb *cb)
{
tprints("{");
enum iocb_sub sub = print_iocb_header(tcp, cb);
switch (sub) {
case SUB_COMMON:
if (cb->aio_lio_opcode == 1 && iocb_is_valid(cb)) {
PRINT_FIELD_STRN(", ", *cb, aio_buf,
cb->aio_nbytes, tcp);
} else {
PRINT_FIELD_X(", ", *cb, aio_buf);
}
PRINT_FIELD_U(", ", *cb, aio_nbytes);
PRINT_FIELD_D(", ", *cb, aio_offset);
print_common_flags(tcp, cb);
break;
case SUB_VECTOR:
if (iocb_is_valid(cb)) {
tprints(", aio_buf=");
tprint_iov(tcp, cb->aio_nbytes, cb->aio_buf,
cb->aio_lio_opcode == 8
? IOV_DECODE_STR
: IOV_DECODE_ADDR);
} else {
PRINT_FIELD_X(", ", *cb, aio_buf);
PRINT_FIELD_U(", ", *cb, aio_nbytes);
}
PRINT_FIELD_D(", ", *cb, aio_offset);
print_common_flags(tcp, cb);
break;
case SUB_NONE:
break;
}
tprints("}");
}
static bool
print_iocbp(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
kernel_ulong_t addr;
struct iocb cb;
if (elem_size < sizeof(kernel_ulong_t)) {
addr = *(unsigned int *) elem_buf;
} else {
addr = *(kernel_ulong_t *) elem_buf;
}
if (!umove_or_printaddr(tcp, addr, &cb))
print_iocb(tcp, &cb);
return true;
}
SYS_FUNC(io_submit)
{
const kernel_long_t nr =
truncate_klong_to_current_wordsize(tcp->u_arg[1]);
const kernel_ulong_t addr = tcp->u_arg[2];
kernel_ulong_t iocbp;
printaddr(tcp->u_arg[0]);
tprintf(", %" PRI_kld ", ", nr);
if (nr < 0)
printaddr(addr);
else
print_array(tcp, addr, nr, &iocbp, current_wordsize,
tfetch_mem, print_iocbp, 0);
return RVAL_DECODED;
}
static bool
print_io_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
{
struct io_event *event = elem_buf;
PRINT_FIELD_X("{", *event, data);
PRINT_FIELD_X(", ", *event, obj);
PRINT_FIELD_D(", ", *event, res);
PRINT_FIELD_D(", ", *event, res2);
tprints("}");
return true;
}
SYS_FUNC(io_cancel)
{
if (entering(tcp)) {
printaddr(tcp->u_arg[0]);
tprints(", ");
struct iocb cb;
if (!umove_or_printaddr(tcp, tcp->u_arg[1], &cb)) {
tprints("{");
print_iocb_header(tcp, &cb);
tprints("}");
}
tprints(", ");
} else {
struct io_event event;
if (!umove_or_printaddr(tcp, tcp->u_arg[2], &event))
print_io_event(tcp, &event, sizeof(event), 0);
}
return 0;
}
static int
print_io_getevents(struct tcb *tcp, bool has_usig)
{
if (entering(tcp)) {
printaddr(tcp->u_arg[0]);
tprintf(", %" PRI_kld ", %" PRI_kld ", ",
truncate_klong_to_current_wordsize(tcp->u_arg[1]),
truncate_klong_to_current_wordsize(tcp->u_arg[2]));
} else {
struct io_event buf;
print_array(tcp, tcp->u_arg[3], tcp->u_rval, &buf, sizeof(buf),
tfetch_mem, print_io_event, 0);
tprints(", ");
/*
* Since the timeout and usig parameters are read by the kernel
* on entering syscall, it has to be decoded the same way
* whether the syscall has failed or not.
*/
temporarily_clear_syserror(tcp);
print_timespec(tcp, tcp->u_arg[4]);
if (has_usig) {
tprints(", ");
print_aio_sigset(tcp, tcp->u_arg[5]);
}
restore_cleared_syserror(tcp);
}
return 0;
}
SYS_FUNC(io_getevents)
{
return print_io_getevents(tcp, false);
}
SYS_FUNC(io_pgetevents)
{
return print_io_getevents(tcp, true);
}