granicus.if.org Git - strace/blob - sg_io_v3.c

   1 /*
   2  * Copyright (c) 2007 Vladimir Nadvornik <nadvornik@suse.cz>
   3  * Copyright (c) 2007-2017 Dmitry V. Levin <ldv@altlinux.org>
   4  * Copyright (c) 2015 Bart Van Assche <bart.vanassche@sandisk.com>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include "defs.h"
  31
  32 #ifdef HAVE_SCSI_SG_H
  33
  34 #include DEF_MPERS_TYPE(struct_sg_io_hdr)
  35
  36 # include <scsi/sg.h>
  37
  38 typedef struct sg_io_hdr struct_sg_io_hdr;
  39
  40 #endif /* HAVE_SCSI_SG_H */
  41
  42 #include MPERS_DEFS
  43
  44 #include "xlat/sg_io_info.h"
  45
  46 #ifdef HAVE_SCSI_SG_H
  47 # include "xlat/sg_io_dxfer_direction.h"
  48 # include "xlat/sg_io_flags.h"
  49
  50 static void
  51 print_sg_io_buffer(struct tcb *const tcp, const kernel_ulong_t addr,
  52                    const unsigned int data_size, const unsigned int iovec_count)
  53 {
  54         if (iovec_count) {
  55                 tprint_iov_upto(tcp, iovec_count, addr, IOV_DECODE_STR,
  56                                 data_size);
  57         } else {
  58                 printstr_ex(tcp, addr, data_size, QUOTE_FORCE_HEX);
  59         }
  60 }
  61
  62 static int
  63 decode_request(struct tcb *const tcp, const kernel_ulong_t arg)
  64 {
  65         struct_sg_io_hdr sg_io;
  66         static const size_t skip_iid =
  67                 offsetof(struct_sg_io_hdr, dxfer_direction);
  68
  69         tprints("{interface_id='S', ");
  70         if (umoven_or_printaddr(tcp, arg + skip_iid, sizeof(sg_io) - skip_iid,
  71                                 &sg_io.dxfer_direction)) {
  72                 tprints("}");
  73                 return RVAL_DECODED | 1;
  74         }
  75
  76         tprints("dxfer_direction=");
  77         printxval(sg_io_dxfer_direction, sg_io.dxfer_direction,
  78                   "SG_DXFER_???");
  79         tprintf(", cmd_len=%u, cmdp=", sg_io.cmd_len);
  80         print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.cmdp), sg_io.cmd_len, 0);
  81         tprintf(", mx_sb_len=%d", sg_io.mx_sb_len);
  82         tprintf(", iovec_count=%d", sg_io.iovec_count);
  83         tprintf(", dxfer_len=%u", sg_io.dxfer_len);
  84         tprintf(", timeout=%u", sg_io.timeout);
  85         tprints(", flags=");
  86         printflags(sg_io_flags, sg_io.flags, "SG_FLAG_???");
  87
  88         if (sg_io.dxfer_direction == SG_DXFER_TO_DEV ||
  89             sg_io.dxfer_direction == SG_DXFER_TO_FROM_DEV) {
  90                 tprints(", dxferp=");
  91                 print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.dxferp),
  92                                    sg_io.dxfer_len, sg_io.iovec_count);
  93         }
  94
  95         struct_sg_io_hdr *entering_sg_io = malloc(sizeof(*entering_sg_io));
  96         if (entering_sg_io) {
  97                 memcpy(entering_sg_io, &sg_io, sizeof(sg_io));
  98                 entering_sg_io->interface_id = (unsigned char) 'S';
  99                 set_tcb_priv_data(tcp, entering_sg_io, free);
 100         }
 101
 102         return 1;
 103 }
 104
 105 static int
 106 decode_response(struct tcb *const tcp, const kernel_ulong_t arg)
 107 {
 108         struct_sg_io_hdr *entering_sg_io = get_tcb_priv_data(tcp);
 109         struct_sg_io_hdr sg_io;
 110
 111         if (umove(tcp, arg, &sg_io) < 0) {
 112                 /* print i/o fields fetched on entering syscall */
 113                 if (entering_sg_io->dxfer_direction == SG_DXFER_FROM_DEV) {
 114                         tprints(", dxferp=");
 115                         printaddr(ptr_to_kulong(entering_sg_io->dxferp));
 116                 }
 117                 tprints(", sbp=");
 118                 printaddr(ptr_to_kulong(entering_sg_io->sbp));
 119                 return RVAL_DECODED | 1;
 120         }
 121
 122         if (sg_io.interface_id != entering_sg_io->interface_id) {
 123                 tprintf(" => interface_id=%u", sg_io.interface_id);
 124                 return RVAL_DECODED | 1;
 125         }
 126
 127         if (sg_io.dxfer_direction == SG_DXFER_FROM_DEV ||
 128             sg_io.dxfer_direction == SG_DXFER_TO_FROM_DEV) {
 129                 uint32_t din_len = sg_io.dxfer_len;
 130
 131                 if (sg_io.resid > 0 && (unsigned int) sg_io.resid <= din_len)
 132                         din_len -= sg_io.resid;
 133                 if (sg_io.dxfer_direction == SG_DXFER_FROM_DEV) {
 134                         tprints(", dxferp=");
 135                 } else if (din_len) {
 136                         tprints(" => dxferp=");
 137                 }
 138                 if (sg_io.dxfer_direction == SG_DXFER_FROM_DEV || din_len) {
 139                         print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.dxferp),
 140                                            din_len, sg_io.iovec_count);
 141                 }
 142         }
 143         tprintf(", status=%#x", sg_io.status);
 144         tprintf(", masked_status=%#x", sg_io.masked_status);
 145         tprintf(", msg_status=%#x", sg_io.msg_status);
 146         tprintf(", sb_len_wr=%u, sbp=", sg_io.sb_len_wr);
 147         print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.sbp), sg_io.sb_len_wr, 0);
 148         tprintf(", host_status=%#x", sg_io.host_status);
 149         tprintf(", driver_status=%#x", sg_io.driver_status);
 150         tprintf(", resid=%d", sg_io.resid);
 151         tprintf(", duration=%u", sg_io.duration);
 152         tprints(", info=");
 153         printflags(sg_io_info, sg_io.info, "SG_INFO_???");
 154
 155         return RVAL_DECODED | 1;
 156 }
 157
 158 #else /* !HAVE_SCSI_SG_H */
 159
 160 static int
 161 decode_request(struct tcb *const tcp, const kernel_ulong_t arg)
 162 {
 163         tprints("{interface_id='S', ...}");
 164         return RVAL_DECODED | 1;
 165 }
 166
 167 static int
 168 decode_response(struct tcb *const tcp, const kernel_ulong_t arg)
 169 {
 170         return 0;
 171 }
 172
 173 #endif
 174
 175 MPERS_PRINTER_DECL(int, decode_sg_io_v3,
 176                    struct tcb *const tcp, const kernel_ulong_t arg)
 177 {
 178         return entering(tcp) ? decode_request(tcp, arg)
 179                              : decode_response(tcp, arg);
 180 }