/* * Copyright (c) 1991, 1992 Paul Kranenburg * Copyright (c) 1993 Branko Lankester * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey * Copyright (c) 1996-1999 Wichert Akkerman * Copyright (c) 1999-2017 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 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 struct { const char *name; enum iocb_sub sub; } cmds[] = { { "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 }, }; if (cmd < ARRAY_SIZE(cmds)) { tprints(cmds[cmd].name); return cmds[cmd].sub; } tprintf("%u", cmd); tprints_comment("IOCB_CMD_???"); return 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) { 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; } } 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; } tprints("{"); if (!umove_or_printaddr(tcp, addr, &cb)) print_iocb(tcp, &cb); tprints("}"); 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; } SYS_FUNC(io_getevents) { 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 parameter is 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]); restore_cleared_syserror(tcp); } return 0; }