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277 lines
6.8 KiB
277 lines
6.8 KiB
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 1999-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "defs.h"
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#include "print_fields.h"
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#include <linux/aio_abi.h>
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#include "xlat/aio_cmds.h"
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SYS_FUNC(io_setup)
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{
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if (entering(tcp))
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tprintf("%u, ", (unsigned int) tcp->u_arg[0]);
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else
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printnum_ptr(tcp, tcp->u_arg[1]);
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return 0;
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}
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SYS_FUNC(io_destroy)
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{
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printaddr(tcp->u_arg[0]);
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return RVAL_DECODED;
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}
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enum iocb_sub {
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SUB_NONE, SUB_COMMON, SUB_VECTOR
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};
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static enum iocb_sub
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tprint_lio_opcode(unsigned int cmd)
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{
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static const enum iocb_sub subs[] = {
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[IOCB_CMD_PREAD] = SUB_COMMON,
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[IOCB_CMD_PWRITE] = SUB_COMMON,
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[IOCB_CMD_FSYNC] = SUB_NONE,
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[IOCB_CMD_FDSYNC] = SUB_NONE,
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[IOCB_CMD_PREADX] = SUB_NONE,
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[IOCB_CMD_POLL] = SUB_NONE,
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[IOCB_CMD_NOOP] = SUB_NONE,
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[IOCB_CMD_PREADV] = SUB_VECTOR,
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[IOCB_CMD_PWRITEV] = SUB_VECTOR,
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};
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printxval_indexn_ex(ARRSZ_PAIR(aio_cmds), cmd, "IOCB_CMD_???",
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XLAT_STYLE_FMT_U);
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return cmd < ARRAY_SIZE(subs) ? subs[cmd] : SUB_NONE;
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}
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static void
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print_common_flags(struct tcb *tcp, const struct iocb *cb)
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{
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/* IOCB_FLAG_RESFD is available since v2.6.22-rc1~47 */
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#ifdef IOCB_FLAG_RESFD
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if (cb->aio_flags & IOCB_FLAG_RESFD)
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PRINT_FIELD_FD(", ", *cb, aio_resfd, tcp);
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if (cb->aio_flags & ~IOCB_FLAG_RESFD)
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PRINT_FIELD_X(", ", *cb, aio_flags);
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#endif
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}
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static bool
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iocb_is_valid(const struct iocb *cb)
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{
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return cb->aio_buf == (unsigned long) cb->aio_buf &&
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cb->aio_nbytes == (size_t) cb->aio_nbytes &&
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(ssize_t) cb->aio_nbytes >= 0;
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}
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static enum iocb_sub
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print_iocb_header(struct tcb *tcp, const struct iocb *cb)
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{
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enum iocb_sub sub;
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if (cb->aio_data){
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PRINT_FIELD_X("", *cb, aio_data);
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tprints(", ");
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}
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if (cb->aio_key) {
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PRINT_FIELD_U("", *cb, aio_key);
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tprints(", ");
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}
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tprints("aio_lio_opcode=");
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sub = tprint_lio_opcode(cb->aio_lio_opcode);
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if (cb->aio_reqprio)
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PRINT_FIELD_D(", ", *cb, aio_reqprio);
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PRINT_FIELD_FD(", ", *cb, aio_fildes, tcp);
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return sub;
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}
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static void
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print_iocb(struct tcb *tcp, const struct iocb *cb)
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{
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tprints("{");
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enum iocb_sub sub = print_iocb_header(tcp, cb);
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switch (sub) {
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case SUB_COMMON:
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if (cb->aio_lio_opcode == 1 && iocb_is_valid(cb)) {
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PRINT_FIELD_STRN(", ", *cb, aio_buf,
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cb->aio_nbytes, tcp);
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} else {
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PRINT_FIELD_X(", ", *cb, aio_buf);
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}
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PRINT_FIELD_U(", ", *cb, aio_nbytes);
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PRINT_FIELD_D(", ", *cb, aio_offset);
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print_common_flags(tcp, cb);
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break;
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case SUB_VECTOR:
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if (iocb_is_valid(cb)) {
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tprints(", aio_buf=");
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tprint_iov(tcp, cb->aio_nbytes, cb->aio_buf,
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cb->aio_lio_opcode == 8
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? IOV_DECODE_STR
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: IOV_DECODE_ADDR);
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} else {
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PRINT_FIELD_X(", ", *cb, aio_buf);
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PRINT_FIELD_U(", ", *cb, aio_nbytes);
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}
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PRINT_FIELD_D(", ", *cb, aio_offset);
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print_common_flags(tcp, cb);
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break;
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case SUB_NONE:
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break;
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}
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tprints("}");
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}
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static bool
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print_iocbp(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
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{
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kernel_ulong_t addr;
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struct iocb cb;
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if (elem_size < sizeof(kernel_ulong_t)) {
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addr = *(unsigned int *) elem_buf;
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} else {
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addr = *(kernel_ulong_t *) elem_buf;
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}
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if (!umove_or_printaddr(tcp, addr, &cb))
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print_iocb(tcp, &cb);
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return true;
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}
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SYS_FUNC(io_submit)
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{
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const kernel_long_t nr =
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truncate_klong_to_current_wordsize(tcp->u_arg[1]);
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const kernel_ulong_t addr = tcp->u_arg[2];
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kernel_ulong_t iocbp;
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printaddr(tcp->u_arg[0]);
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tprintf(", %" PRI_kld ", ", nr);
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if (nr < 0)
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printaddr(addr);
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else
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print_array(tcp, addr, nr, &iocbp, current_wordsize,
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tfetch_mem, print_iocbp, 0);
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return RVAL_DECODED;
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}
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static bool
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print_io_event(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
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{
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struct io_event *event = elem_buf;
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PRINT_FIELD_X("{", *event, data);
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PRINT_FIELD_X(", ", *event, obj);
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PRINT_FIELD_D(", ", *event, res);
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PRINT_FIELD_D(", ", *event, res2);
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tprints("}");
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return true;
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}
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SYS_FUNC(io_cancel)
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{
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if (entering(tcp)) {
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printaddr(tcp->u_arg[0]);
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tprints(", ");
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struct iocb cb;
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if (!umove_or_printaddr(tcp, tcp->u_arg[1], &cb)) {
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tprints("{");
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print_iocb_header(tcp, &cb);
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tprints("}");
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}
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tprints(", ");
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} else {
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struct io_event event;
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if (!umove_or_printaddr(tcp, tcp->u_arg[2], &event))
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print_io_event(tcp, &event, sizeof(event), 0);
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}
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return 0;
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}
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static int
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print_io_getevents(struct tcb *tcp, bool has_usig)
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{
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if (entering(tcp)) {
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printaddr(tcp->u_arg[0]);
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tprintf(", %" PRI_kld ", %" PRI_kld ", ",
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truncate_klong_to_current_wordsize(tcp->u_arg[1]),
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truncate_klong_to_current_wordsize(tcp->u_arg[2]));
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} else {
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struct io_event buf;
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print_array(tcp, tcp->u_arg[3], tcp->u_rval, &buf, sizeof(buf),
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tfetch_mem, print_io_event, 0);
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tprints(", ");
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/*
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* Since the timeout and usig parameters are read by the kernel
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* on entering syscall, it has to be decoded the same way
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* whether the syscall has failed or not.
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*/
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temporarily_clear_syserror(tcp);
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print_timespec(tcp, tcp->u_arg[4]);
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if (has_usig) {
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tprints(", ");
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print_aio_sigset(tcp, tcp->u_arg[5]);
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}
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restore_cleared_syserror(tcp);
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}
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return 0;
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}
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SYS_FUNC(io_getevents)
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{
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return print_io_getevents(tcp, false);
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}
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SYS_FUNC(io_pgetevents)
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{
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return print_io_getevents(tcp, true);
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}
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