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 #ifdef HAVE_SCSI_SG_H
  45 # include "xlat/sg_io_dxfer_direction.h"
  46 # include "xlat/sg_io_flags.h"
  47
  48 static void
  49 print_sg_io_buffer(struct tcb *const tcp, const kernel_ulong_t addr,
  50                    const unsigned int len)
  51 {
  52         printstr_ex(tcp, addr, len, QUOTE_FORCE_HEX);
  53 }
  54
  55 static int
  56 decode_request(struct tcb *const tcp, const kernel_ulong_t arg)
  57 {
  58         struct_sg_io_hdr sg_io;
  59         static const size_t skip_iid =
  60                 offsetof(struct_sg_io_hdr, dxfer_direction);
  61
  62         tprints("{interface_id='S', ");
  63         if (umoven_or_printaddr(tcp, arg + skip_iid, sizeof(sg_io) - skip_iid,
  64                                 &sg_io.dxfer_direction)) {
  65                 tprints("}");
  66                 return RVAL_DECODED | 1;
  67         }
  68
  69         tprints("dxfer_direction=");
  70         printxval(sg_io_dxfer_direction, sg_io.dxfer_direction,
  71                   "SG_DXFER_???");
  72         tprintf(", cmd[%u]=", sg_io.cmd_len);
  73         print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.cmdp), sg_io.cmd_len);
  74         tprintf(", mx_sb_len=%d", sg_io.mx_sb_len);
  75         tprintf(", iovec_count=%d", sg_io.iovec_count);
  76         tprintf(", dxfer_len=%u", sg_io.dxfer_len);
  77         tprintf(", timeout=%u", sg_io.timeout);
  78         tprints(", flags=");
  79         printflags(sg_io_flags, sg_io.flags, "SG_FLAG_???");
  80
  81         if (sg_io.dxfer_direction == SG_DXFER_TO_DEV ||
  82             sg_io.dxfer_direction == SG_DXFER_TO_FROM_DEV) {
  83                 tprintf(", data[%u]=", sg_io.dxfer_len);
  84                 if (sg_io.iovec_count)
  85                         tprint_iov_upto(tcp, sg_io.iovec_count,
  86                                         ptr_to_kulong(sg_io.dxferp),
  87                                         IOV_DECODE_STR,
  88                                         sg_io.dxfer_len);
  89                 else
  90                         print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.dxferp),
  91                                            sg_io.dxfer_len);
  92         }
  93         return 1;
  94 }
  95
  96 static int
  97 decode_response(struct tcb *const tcp, const kernel_ulong_t arg)
  98 {
  99         struct_sg_io_hdr sg_io;
 100
 101         if (umove(tcp, arg, &sg_io) < 0) {
 102                 tprints(", ???");
 103                 return RVAL_DECODED | 1;
 104         }
 105
 106         if (sg_io.interface_id != (unsigned char) 'S') {
 107                 tprintf(" => interface_id=%u", sg_io.interface_id);
 108                 return RVAL_DECODED | 1;
 109         }
 110
 111         if (sg_io.dxfer_direction == SG_DXFER_FROM_DEV ||
 112             sg_io.dxfer_direction == SG_DXFER_TO_FROM_DEV) {
 113                 uint32_t din_len = sg_io.dxfer_len;
 114
 115                 if (sg_io.resid > 0)
 116                         din_len -= sg_io.resid;
 117                 tprintf(", data[%u]=", din_len);
 118                 if (sg_io.iovec_count)
 119                         tprint_iov_upto(tcp, sg_io.iovec_count,
 120                                         ptr_to_kulong(sg_io.dxferp),
 121                                         syserror(tcp) ? IOV_DECODE_ADDR :
 122                                         IOV_DECODE_STR, din_len);
 123                 else
 124                         print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.dxferp),
 125                                            din_len);
 126         }
 127         tprintf(", status=%02x", sg_io.status);
 128         tprintf(", masked_status=%02x", sg_io.masked_status);
 129         tprintf(", sb[%u]=", sg_io.sb_len_wr);
 130         print_sg_io_buffer(tcp, ptr_to_kulong(sg_io.sbp), sg_io.sb_len_wr);
 131         tprintf(", host_status=%#x", sg_io.host_status);
 132         tprintf(", driver_status=%#x", sg_io.driver_status);
 133         tprintf(", resid=%d", sg_io.resid);
 134         tprintf(", duration=%d", sg_io.duration);
 135         tprintf(", info=%#x", sg_io.info);
 136
 137         return RVAL_DECODED | 1;
 138 }
 139
 140 #else /* !HAVE_SCSI_SG_H */
 141
 142 static int
 143 decode_request(struct tcb *const tcp, const kernel_ulong_t arg)
 144 {
 145         tprints("{interface_id='S', ...}");
 146         return RVAL_DECODED | 1;
 147 }
 148
 149 static int
 150 decode_response(struct tcb *const tcp, const kernel_ulong_t arg)
 151 {
 152         return 0;
 153 }
 154
 155 #endif
 156
 157 MPERS_PRINTER_DECL(int, decode_sg_io_v3,
 158                    struct tcb *const tcp, const kernel_ulong_t arg)
 159 {
 160         return entering(tcp) ? decode_request(tcp, arg)
 161                              : decode_response(tcp, arg);
 162 }