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

   1 /*
   2  * Copyright (c) 2007 Vladimir Nadvornik <nadvornik@suse.cz>
   3  * Copyright (c) 2007-2018 Dmitry V. Levin <ldv@altlinux.org>
   4  * All rights reserved.
   5  *
   6  * SPDX-License-Identifier: LGPL-2.1-or-later
   7  */
   8
   9 #include "defs.h"
  10
  11 #ifdef HAVE_SCSI_SG_H
  12 # include <scsi/sg.h>
  13 #endif
  14
  15 #define XLAT_MACROS_ONLY
  16 # include "xlat/scsi_sg_commands.h"
  17 #undef XLAT_MACROS_ONLY
  18 #include "xlat/sg_scsi_reset.h"
  19
  20 static int
  21 decode_sg_io(struct tcb *const tcp, const uint32_t iid,
  22              const kernel_ulong_t arg)
  23 {
  24         switch (iid) {
  25                 case 'S':
  26                         return decode_sg_io_v3(tcp, arg);
  27                 case 'Q':
  28                         return decode_sg_io_v4(tcp, arg);
  29                 default:
  30                         tprintf("[%u]", iid);
  31                         return RVAL_IOCTL_DECODED;
  32         }
  33
  34 }
  35
  36 #ifdef HAVE_SCSI_SG_H
  37
  38 static int
  39 decode_sg_scsi_id(struct tcb *const tcp, const kernel_ulong_t arg)
  40 {
  41         struct sg_scsi_id id;
  42
  43         if (entering(tcp))
  44                 return 0;
  45
  46         tprints(", ");
  47         if (!umove_or_printaddr(tcp, arg, &id)) {
  48                 tprintf("{host_no=%d"
  49                         ", channel=%d"
  50                         ", scsi_id=%#x"
  51                         ", lun=%d"
  52                         ", scsi_type=%#x"
  53                         ", h_cmd_per_lun=%hd"
  54                         ", d_queue_depth=%hd}",
  55                         id.host_no,
  56                         id.channel,
  57                         id.scsi_id,
  58                         id.lun,
  59                         id.scsi_type,
  60                         id.h_cmd_per_lun,
  61                         id.d_queue_depth);
  62         }
  63         return RVAL_IOCTL_DECODED;
  64 }
  65
  66 #endif /* HAVE_SCSI_SG_H */
  67
  68 int
  69 scsi_ioctl(struct tcb *const tcp, const unsigned int code,
  70            const kernel_ulong_t arg)
  71 {
  72         switch (code) {
  73         case SG_IO:
  74                 if (entering(tcp)) {
  75                         uint32_t iid;
  76
  77                         tprints(", ");
  78                         if (umove_or_printaddr(tcp, arg, &iid)) {
  79                                 break;
  80                         } else {
  81                                 return decode_sg_io(tcp, iid, arg);
  82                         }
  83                 } else {
  84                         uint32_t *piid = get_tcb_priv_data(tcp);
  85                         if (piid)
  86                                 decode_sg_io(tcp, *piid, arg);
  87                         tprints("}");
  88                         break;
  89                 }
  90
  91 #ifdef HAVE_SCSI_SG_H
  92         /* returns struct sg_scsi_id */
  93         case SG_GET_SCSI_ID:
  94                 return decode_sg_scsi_id(tcp, arg);
  95         /* returns struct sg_req_info */
  96         case SG_GET_REQUEST_TABLE:
  97                 return decode_sg_req_info(tcp, arg);
  98 #endif /* HAVE_SCSI_SG_H */
  99
 100         /* takes a value by pointer */
 101         case SG_SCSI_RESET: {
 102                 unsigned int val;
 103                 tprints(", ");
 104                 if (!umove_or_printaddr(tcp, arg, &val)) {
 105                         tprints("[");
 106                         if (val & SG_SCSI_RESET_NO_ESCALATE) {
 107                                 printxval(sg_scsi_reset,
 108                                           SG_SCSI_RESET_NO_ESCALATE, 0);
 109                                 tprints("|");
 110                         }
 111                         printxval(sg_scsi_reset,
 112                                   val & ~SG_SCSI_RESET_NO_ESCALATE,
 113                                   "SG_SCSI_RESET_???");
 114                         tprints("]");
 115
 116                 }
 117                 break;
 118         }
 119
 120         /* takes a signed int by pointer */
 121         case SG_NEXT_CMD_LEN:
 122         case SG_SET_COMMAND_Q:
 123         case SG_SET_DEBUG:
 124         case SG_SET_FORCE_LOW_DMA:
 125         case SG_SET_FORCE_PACK_ID:
 126         case SG_SET_KEEP_ORPHAN:
 127         case SG_SET_RESERVED_SIZE:
 128         case SG_SET_TIMEOUT:
 129                 tprints(", ");
 130                 printnum_int(tcp, arg, "%d");
 131                 break;
 132
 133         /* returns a signed int by pointer */
 134         case SG_EMULATED_HOST:
 135         case SG_GET_ACCESS_COUNT:
 136         case SG_GET_COMMAND_Q:
 137         case SG_GET_KEEP_ORPHAN:
 138         case SG_GET_LOW_DMA:
 139         case SG_GET_NUM_WAITING:
 140         case SG_GET_PACK_ID:
 141         case SG_GET_RESERVED_SIZE:
 142         case SG_GET_SG_TABLESIZE:
 143         case SG_GET_TRANSFORM:
 144         case SG_GET_VERSION_NUM:
 145                 if (entering(tcp))
 146                         return 0;
 147                 tprints(", ");
 148                 printnum_int(tcp, arg, "%d");
 149                 break;
 150
 151         /* takes an integer by value */
 152         case SG_SET_TRANSFORM:
 153                 tprintf(", %#x", (unsigned int) arg);
 154                 break;
 155
 156         /* no arguments */
 157         case SG_GET_TIMEOUT:
 158                 break;
 159
 160         default:
 161                 return RVAL_DECODED;
 162         }
 163
 164         return RVAL_IOCTL_DECODED;
 165 }