usr/src/cmd/format/disk_generic.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*
  27  * This file contains functions that implement the fdisk menu commands.
  28  */
  29 #include "global.h"
  30 #include <sys/time.h>
  31 #include <sys/resource.h>
  32 #include <sys/wait.h>
  33 #include <signal.h>
  34 #include <string.h>
  35 #include <sys/fcntl.h>
  36 #include <sys/stat.h>
  37
  38 #include <sys/dklabel.h>
  39 #include <errno.h>
  40
  41
  42 #include "main.h"
  43 #include "analyze.h"
  44 #include "menu.h"
  45 #include "menu_command.h"
  46 #include "menu_defect.h"
  47 #include "menu_partition.h"
  48 #if defined(_FIRMWARE_NEEDS_FDISK)
  49 #include "menu_fdisk.h"
  50 #endif  /* defined(_FIRMWARE_NEEDS_FDISK) */
  51 #include "param.h"
  52 #include "misc.h"
  53 #include "label.h"
  54 #include "startup.h"
  55 #include "partition.h"
  56 #include "prompts.h"
  57 #include "checkdev.h"
  58 #include "io.h"
  59 #include "ctlr_scsi.h"
  60 #include "auto_sense.h"
  61
  62 #ifdef  __STDC__
  63 /*
  64  *      Local prototypes for ANSI C compilers
  65  */
  66 static int      generic_ck_format(void);
  67 static int      generic_rdwr(int dir, int fd, diskaddr_t blkno, int secnt,
  68                         caddr_t bufaddr, int flags, int *xfercntp);
  69 #else   /* __STDC__ */
  70
  71 static int      generic_ck_format();
  72 static int      generic_rdwr();
  73
  74 #endif  /* __STDC__ */
  75
  76 struct  ctlr_ops genericops = {
  77         generic_rdwr,
  78         generic_ck_format,
  79         0,
  80         0,
  81         0,
  82         0,
  83         0,
  84 };
  85
  86
  87 /*
  88  * Check to see if the disk has been formatted.
  89  * If we are able to read the first track, we conclude that
  90  * the disk has been formatted.
  91  */
  92 static int
  93 generic_ck_format()
  94 {
  95         int     status;
  96
  97         /*
  98          * Try to read the first four blocks.
  99          */
 100         status = generic_rdwr(DIR_READ, cur_file, 0, 4, (caddr_t)cur_buf,
 101             F_SILENT, NULL);
 102         return (!status);
 103 }
 104
 105 /*
 106  * Read or write the disk.
 107  * Temporary interface until IOCTL interface finished.
 108  */
 109 /*ARGSUSED*/
 110 static int
 111 generic_rdwr(dir, fd, blkno, secnt, bufaddr, flags, xfercntp)
 112         int     dir;
 113         int     fd;
 114         diskaddr_t      blkno;
 115         int     secnt;
 116         caddr_t bufaddr;
 117         int     flags;
 118         int     *xfercntp;
 119 {
 120
 121         offset_t        tmpsec, status, tmpblk;
 122         int             ret;
 123
 124         tmpsec = (offset_t)secnt * cur_blksz;
 125         tmpblk = (offset_t)blkno * cur_blksz;
 126
 127 #if defined(_FIRMWARE_NEEDS_FDISK)
 128         /* Use "p0" file to seek/read the data  */
 129         (void) open_cur_file(FD_USE_P0_PATH);
 130 #endif
 131         if (dir == DIR_READ) {
 132                 status = llseek(fd, tmpblk, SEEK_SET);
 133                 if (status != tmpblk) {
 134                         ret = (int)status;
 135                         goto out;
 136                 }
 137
 138                 status = read(fd, bufaddr, (size_t)tmpsec);
 139                 if (status != tmpsec)
 140                         ret = (int)tmpsec;
 141                 else
 142                         ret = 0;
 143         } else {
 144                 status = llseek(fd, tmpblk, SEEK_SET);
 145                 if (status != tmpblk) {
 146                         ret = (int)status;
 147                         goto out;
 148                 }
 149
 150                 status = write(fd, bufaddr, (size_t)tmpsec);
 151                 if (status != tmpsec)
 152                         ret = (int)tmpsec;
 153                 else
 154                         ret = 0;
 155         }
 156 out:
 157 #if defined(_FIRMWARE_NEEDS_FDISK)
 158         /* Restore cur_file with cur_disk->disk_path */
 159         (void) open_cur_file(FD_USE_CUR_DISK_PATH);
 160 #endif
 161         return (ret);
 162 }