OpenSolaris_b135/cmd/format/ix_altsctr.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* copyright (c) 1990, 1991 UNIX System Laboratories, Inc.
* copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T
* All rights reserved.
*/
/*
* Copyrighted as an unpublished work.
* (c) Copyright INTERACTIVE Systems Corporation 1986, 1988, 1990
* All rights reserved.
*/
#include <sys/types.h>
#include <ctype.h>
#include <fcntl.h>
#include <malloc.h>
#include <sys/stat.h>
#include <sys/swap.h>
#include <stdio.h>
#include <string.h>
#include <sys/vtoc.h>
#include <sys/param.h>
#include <sys/dkio.h>
#include <sys/dktp/altsctr.h>
#include <sys/dktp/fdisk.h>
#include "badsec.h"
#include "global.h"
#include "ctlr_ata.h"
#include "misc.h"
#define FAILURE 1
#define SUCCESS 0
#define CMD_READ 0
#define CMD_WRITE 1
struct badsec_lst *badsl_chain = NULL;
int badsl_chain_cnt = 0;
struct badsec_lst *gbadsl_chain = NULL;
int gbadsl_chain_cnt = 0;
static struct alts_mempart alts_part = { 0, NULL, 0 };
struct alts_mempart *ap = &alts_part; /* pointer to incore */
/* alts tables */
/* prototypes */
int updatebadsec(struct dkl_partition *, int);
int read_altsctr(struct dkl_partition *);
static int chk_badsec();
static int init_altsctr();
static int get_altsctr();
int wr_altsctr();
static void get_badsec();
static int count_badsec();
static int gen_alts_ent();
static int assign_altsctr();
static void expand_map();
static void compress_map();
static int altsmap_getbit(blkaddr_t);
static blkaddr_t altsmap_alloc(blkaddr_t, blkaddr_t, int, int);
static void ent_sort(struct alts_ent *, int);
static void ent_compress(struct alts_ent *, int);
static int ent_merge(struct alts_ent *, struct alts_ent *, int,
struct alts_ent *, int);
static int ent_bsearch(struct alts_ent *, int, struct alts_ent *);
static int chk_bad_altsctr(blkaddr_t);
/*
* updatebadsec () -- update bad sector/track mapping tables
*/
int
updatebadsec(part, init_flag)
int init_flag;
struct dkl_partition *part;
{
if (init_flag)
ap->ap_flag |= ALTS_ADDPART;
get_badsec();
(void) read_altsctr(part);
ent_sort(ap->ap_gbadp, ap->ap_gbadcnt);
ent_compress(ap->ap_gbadp, ap->ap_gbadcnt);
(void) gen_alts_ent();
compress_map();
return (SUCCESS);
}
/*
* read_altsctr( ptr to alternate sector partition )
* -- read the alternate sector partition tables
*/
int
read_altsctr(part)
struct dkl_partition *part;
{
if (ap->ap_tblp == NULL) {
/* allocate buffer for the alts partition table (sector size) */
ap->ap_tbl_secsiz = byte_to_secsiz(ALTS_PARTTBL_SIZE, NBPSCTR);
ap->ap_tblp = (struct alts_parttbl *)malloc(ap->ap_tbl_secsiz);
if (ap->ap_tblp == NULL) {
(void) fprintf(stderr,
"Unable to malloc alternate partition table.\n");
return (50);
}
/* allocate buffer for the alts partition map (sector size) */
/* buffers include the disk image bit map */
/* and the incore transformed char map */
if ((ap->ap_memmapp = (uchar_t *)malloc(part->p_size)) == NULL) {
(void) fprintf(stderr,
"Unable to malloc incore alternate partition map.\n");
return (51);
}
ap->ap_tblp->alts_map_len = (part->p_size + 8 - 1) / 8;
ap->ap_map_secsiz = byte_to_secsiz(ap->ap_tblp->alts_map_len,
NBPSCTR);
ap->ap_map_sectot = ap->ap_map_secsiz / NBPSCTR;
if ((ap->ap_mapp = (uchar_t *)malloc(ap->ap_map_secsiz)) == NULL) {
(void) fprintf(stderr,
"Unable to malloc alternate partition map.\n");
return (52);
}
/* clear the buffers to zero */
(void) memset(ap->ap_memmapp, 0, part->p_size);
(void) memset(ap->ap_mapp, 0, ap->ap_map_secsiz);
ap->part = *part; /* struct copy */
/*
* if add alternate partition flag is set, then install the partition
* otherwise read the alts partition info from disk
* if failed, then assume the first installation
*/
if (ap->ap_flag & ALTS_ADDPART)
{
(void) fprintf(stderr,
"WARNING: Manually initializing alternate table.\n");
(void) init_altsctr();
} else {
if (get_altsctr() == SUCCESS)
(void) chk_badsec();
else
(void) init_altsctr();
}
}
return (SUCCESS);
}
/*
* checking duplicate bad sectors or bad sectors in ALTSCTR partition
*/
static int
chk_badsec()
{
blkaddr_t badsec;
blkaddr_t altsp_srtsec = ap->part.p_start;
blkaddr_t altsp_endsec = ap->part.p_start + ap->part.p_size - 1;
int cnt;
int status;
for (cnt = 0; cnt < ap->ap_gbadcnt; cnt++) {
badsec = (ap->ap_gbadp)[cnt].bad_start;
/* if bad sector is within the ATLSCTR partition */
if ((badsec >= altsp_srtsec) && (badsec <= altsp_endsec)) {
if ((ap->ap_memmapp)[badsec - altsp_srtsec] != ALTS_BAD) {
if ((badsec >= altsp_srtsec) && (badsec <= (altsp_srtsec +
ap->ap_tbl_secsiz / NBPSCTR - 1))) {
(void) fprintf(stderr,
"Alternate partition information table is bad.\n");
return (53);
}
if ((badsec >= altsp_srtsec+ap->ap_tblp->alts_map_base) &&
(badsec <= (altsp_srtsec + ap->ap_tblp->alts_map_base +
ap->ap_map_sectot - 1))) {
(void) fprintf(stderr,
"Alternate partition map is bad.\n");
return (54);
}
if ((badsec >= altsp_srtsec+ap->ap_tblp->alts_ent_base) &&
(badsec <= (altsp_srtsec + ap->ap_tblp->alts_ent_base +
ap->ap_ent_secsiz / NBPSCTR - 1))) {
(void) fprintf(stderr,
"Alternate partition entry table is bad.\n");
return (55);
}
(ap->ap_memmapp)[badsec - altsp_srtsec] = ALTS_BAD;
(ap->ap_gbadp)[cnt].bad_start = (uint32_t)ALTS_ENT_EMPTY;
} else {
status = chk_bad_altsctr(badsec);
(ap->ap_gbadp)[cnt].bad_start = (uint32_t)ALTS_ENT_EMPTY;
}
} else {
/*
* binary search for bad sector in the alts entry table
*/
status = ent_bsearch(ap->ap_entp, ap->ap_tblp->alts_ent_used,
&((ap->ap_gbadp)[cnt]));
/*
* if the bad sector had already been remapped(found in alts_entry)
* then ignore the bad sector
*/
if (status != -1) {
(ap->ap_gbadp)[cnt].bad_start = (uint32_t)ALTS_ENT_EMPTY;
}
}
}
return (SUCCESS);
}
/*
* initialize the alternate partition tables
*/
static int
init_altsctr()
{
blkaddr_t badsec;
blkaddr_t altsp_srtsec = ap->part.p_start;
blkaddr_t altsp_endsec = ap->part.p_start + ap->part.p_size - 1;
int cnt;
ap->ap_entp = NULL;
ap->ap_ent_secsiz = 0;
ap->ap_tblp->alts_sanity = ALTS_SANITY;
ap->ap_tblp->alts_version = ALTS_VERSION1;
ap->ap_tblp->alts_map_len = (ap->part.p_size + 8 - 1) / 8;
ap->ap_tblp->alts_ent_used = 0;
ap->ap_tblp->alts_ent_base = 0;
ap->ap_tblp->alts_ent_end = 0;
ap->ap_tblp->alts_resv_base = ap->part.p_size - 1;
for (cnt = 0; cnt < 5; cnt++)
ap->ap_tblp->alts_pad[cnt] = 0;
for (cnt = 0; cnt < ap->ap_gbadcnt; cnt++) {
badsec = (ap->ap_gbadp)[cnt].bad_start;
if ((badsec >= altsp_srtsec) && (badsec <= altsp_endsec)) {
if (badsec == altsp_srtsec) {
(void) fprintf(stderr,
"First sector of alternate partition is bad.\n");
return (56);
}
(ap->ap_memmapp)[badsec - altsp_srtsec] = ALTS_BAD;
(ap->ap_gbadp)[cnt].bad_start = (uint32_t)ALTS_ENT_EMPTY;
}
}
/* allocate the alts_map on disk skipping possible bad sectors */
ap->ap_tblp->alts_map_base =
altsmap_alloc(ap->ap_tbl_secsiz / NBPSCTR,
ap->part.p_size, ap->ap_map_sectot, ALTS_MAP_UP);
if (ap->ap_tblp->alts_map_base == NULL) {
perror("Unable to allocate alternate map on disk: ");
return (57);
}
(void) wr_altsctr();
return (SUCCESS);
}
/*
* read the alternate partition tables from disk
*/
static int
get_altsctr()
{
int mystatus = FAILURE;
int status = 0;
/* get alts partition table info */
status = ata_rdwr(DIR_READ, cur_file, altsec_offset,
ap->ap_tbl_secsiz / UBSIZE, (char *)ap->ap_tblp,
0, NULL);
if (status == FAILURE) {
perror("Unable to read alternate sector partition: ");
return (58);
}
if (ap->ap_tblp->alts_sanity != ALTS_SANITY)
return (mystatus);
/* get the alts map */
status = ata_rdwr(DIR_READ, cur_file,
(ap->ap_tblp->alts_map_base) + altsec_offset,
ap->ap_map_secsiz / UBSIZE, (char *)ap->ap_mapp, 0, NULL);
if (status == FAILURE) {
perror("Unable to read alternate sector partition map: ");
return (59);
}
/* transform the disk image bit-map to incore char map */
expand_map();
if (ap->ap_tblp->alts_ent_used == 0) {
ap->ap_entp = NULL;
ap->ap_ent_secsiz = 0;
} else {
ap->ap_ent_secsiz = byte_to_secsiz(
(ap->ap_tblp->alts_ent_used*ALTS_ENT_SIZE), NBPSCTR);
if ((ap->ap_entp =
(struct alts_ent *)malloc(ap->ap_ent_secsiz)) == NULL) {
(void) fprintf(stderr,
"Unable to malloc alternate sector entry table.\n");
return (60);
}
status = ata_rdwr(DIR_READ, cur_file,
(ap->ap_tblp->alts_ent_base) + altsec_offset,
ap->ap_ent_secsiz / UBSIZE, (char *)ap->ap_entp,
0, NULL);
if (status == FAILURE) {
perror("Unable to read alternate sector entry table: ");
return (61);
}
}
return (SUCCESS);
}
/*
* update the new alternate partition tables on disk
*/
int
wr_altsctr()
{
int status;
if (ap->ap_tblp == NULL)
return (0);
status = ata_rdwr(DIR_WRITE, cur_file, altsec_offset,
ap->ap_tbl_secsiz / UBSIZE, (char *)ap->ap_tblp, 0, NULL);
if (status) {
(void) printf("ata_rdwr status = %d need = %d\n",
status, ap->ap_tbl_secsiz / 512);
perror("Unable to write with ata_rdwr the alt sector part: ");
return (62);
}
if (ata_rdwr(DIR_WRITE, cur_file, (ap->ap_tblp->alts_map_base) +
altsec_offset, ap->ap_map_secsiz / UBSIZE,
(char *)ap->ap_mapp, 0, NULL) == FAILURE) {
perror("Unable to write alternate sector partition map: ");
return (63);
}
if (ap->ap_tblp->alts_ent_used != 0) {
if (ata_rdwr(DIR_WRITE, cur_file,
(ap->ap_tblp->alts_ent_base)+ altsec_offset,
ap->ap_ent_secsiz / UBSIZE,
(char *)ap->ap_entp, 0, NULL) == FAILURE) {
perror("Unable to write alternate sector entry table: ");
return (64);
}
}
return (0);
}
/*
* get a list of bad sector
*/
static void
get_badsec()
{
int cnt;
struct badsec_lst *blc_p;
blkaddr_t curbad;
blkaddr_t maxsec = cur_dtype->dtype_nhead *
cur_dtype->dtype_ncyl *
cur_dtype->dtype_nsect;
struct alts_ent *growbadp;
int i;
cnt = count_badsec();
if (!cnt) {
ap->ap_gbadp = NULL;
ap->ap_gbadcnt = 0;
} else {
ap->ap_gbadp = malloc(cnt*ALTS_ENT_SIZE);
if (ap->ap_gbadp == NULL) {
err_print("get_badsec: unable to malloc %d bytes\n",
cnt*ALTS_ENT_SIZE);
fullabort();
}
(void) memset(ap->ap_gbadp, 0, cnt*ALTS_ENT_SIZE);
for (growbadp = ap->ap_gbadp, cnt = 0, blc_p = badsl_chain;
blc_p; blc_p = blc_p->bl_nxt) {
for (i = 0; i < blc_p->bl_cnt; i++) {
curbad = blc_p->bl_sec[i];
if (curbad < (blkaddr_t)cur_dtype->dtype_nsect) {
(void) fprintf(stderr,
"Ignoring bad sector %ld which is in first track of the drive.\n", curbad);
continue;
}
if (curbad >= maxsec) {
(void) fprintf(stderr,
"Ignoring bad sector %ld which is past the end of the drive.\n", curbad);
continue;
}
growbadp[cnt].bad_start = curbad;
growbadp[cnt].bad_end = curbad;
cnt++;
}
}
}
ap->ap_gbadcnt = cnt;
}
/*
* count number of bad sector on list
* merging the bad sector list from surface analysis and the
* one given through the command line
*/
static int
count_badsec()
{
struct badsec_lst *blc_p;
if (!badsl_chain)
badsl_chain = gbadsl_chain;
else {
for (blc_p = badsl_chain; blc_p->bl_nxt; blc_p = blc_p->bl_nxt)
;
blc_p->bl_nxt = gbadsl_chain;
}
badsl_chain_cnt += gbadsl_chain_cnt;
return (badsl_chain_cnt);
}
/*
* generate alternate entry table by merging the existing and
* the new entry list.
*/
static int
gen_alts_ent() {
uint_t ent_used;
struct alts_ent *entp;
if (ap->ap_gbadcnt == 0)
return (0);
ent_used = ap->ap_tblp->alts_ent_used + ap->ap_gbadcnt;
ap->ap_ent_secsiz = byte_to_secsiz(ent_used*ALTS_ENT_SIZE, NBPSCTR);
entp = malloc(ap->ap_ent_secsiz);
if (entp == NULL) {
err_print("get_alts_ent: unable to malloc %d bytes\n",
ap->ap_ent_secsiz);
fullabort();
}
ent_used = ent_merge(entp, ap->ap_entp, ap->ap_tblp->alts_ent_used,
ap->ap_gbadp, ap->ap_gbadcnt);
if (ap->ap_entp)
free(ap->ap_entp);
if (ap->ap_gbadp)
free(ap->ap_gbadp);
ap->ap_entp = entp;
ap->ap_ent_secsiz = byte_to_secsiz(ent_used*ALTS_ENT_SIZE, NBPSCTR);
ap->ap_tblp->alts_ent_used = ent_used;
ap->ap_gbadp = NULL;
ap->ap_gbadcnt = 0;
/* assign alternate sectors to the bad sectors */
(void) assign_altsctr();
/* allocate the alts_entry on disk skipping possible bad sectors */
ap->ap_tblp->alts_ent_base =
altsmap_alloc((blkaddr_t)ap->ap_tblp->alts_map_base +
ap->ap_map_sectot, (blkaddr_t)ap->part.p_size,
ap->ap_ent_secsiz / NBPSCTR, ALTS_MAP_UP);
if (ap->ap_tblp->alts_ent_base == NULL) {
perror("Unable to allocate alternate entry table on disk: ");
return (65);
}
ap->ap_tblp->alts_ent_end = ap->ap_tblp->alts_ent_base +
(ap->ap_ent_secsiz / NBPSCTR) - 1;
return (0);
}
/*
* assign alternate sectors for bad sector mapping
*/
static int
assign_altsctr()
{
uint_t i;
uint_t j;
blkaddr_t alts_ind;
uint_t cluster;
for (i = 0; i < ap->ap_tblp->alts_ent_used; i++) {
if ((ap->ap_entp)[i].bad_start == (uint32_t)ALTS_ENT_EMPTY)
continue;
if ((ap->ap_entp)[i].good_start != 0)
continue;
cluster = (ap->ap_entp)[i].bad_end-(ap->ap_entp)[i].bad_start +1;
alts_ind =
altsmap_alloc(ap->part.p_size-1, ap->ap_tblp->alts_map_base +
ap->ap_map_sectot - 1, cluster, ALTS_MAP_DOWN);
if (alts_ind == NULL) {
(void) fprintf(stderr,
"Unable to allocate alternates for bad starting sector %u.\n",
(ap->ap_entp)[i].bad_start);
return (65);
}
alts_ind = alts_ind - cluster + 1;
(ap->ap_entp)[i].good_start = alts_ind +ap->part.p_start;
for (j = 0; j < cluster; j++) {
(ap->ap_memmapp)[alts_ind+j] = ALTS_BAD;
}
}
return (SUCCESS);
}
/*
* transform the disk image alts bit map to incore char map
*/
static void
expand_map()
{
int i;
for (i = 0; i < ap->part.p_size; i++) {
(ap->ap_memmapp)[i] = altsmap_getbit(i);
}
}
/*
* transform the incore alts char map to the disk image bit map
*/
static void
compress_map()
{
int i;
int bytesz;
char mask = 0;
int maplen = 0;
for (i = 0, bytesz = 7; i < ap->part.p_size; i++) {
mask |= ((ap->ap_memmapp)[i] << bytesz--);
if (bytesz < 0) {
(ap->ap_mapp)[maplen++] = mask;
bytesz = 7;
mask = 0;
}
}
/*
* if partition size != multiple number of bytes
* then record the last partial byte
*/
if (bytesz != 7)
(ap->ap_mapp)[maplen] = mask;
}
/*
* given a bad sector number, search in the alts bit map
* and identify the sector as good or bad
*/
static int
altsmap_getbit(badsec)
blkaddr_t badsec;
{
uint_t slot = badsec / 8;
uint_t field = badsec % 8;
uchar_t mask;
mask = ALTS_BAD<<7;
mask >>= field;
if ((ap->ap_mapp)[slot] & mask)
return (ALTS_BAD);
return (ALTS_GOOD);
}
/*
* allocate a range of sectors from the alternate partition
*/
static blkaddr_t
altsmap_alloc(srt_ind, end_ind, cnt, dir)
blkaddr_t srt_ind;
blkaddr_t end_ind;
int cnt;
int dir;
{
blkaddr_t i;
blkaddr_t total;
blkaddr_t first_ind;
for (i = srt_ind, first_ind = srt_ind, total = 0;
i != end_ind; i += dir) {
if ((ap->ap_memmapp)[i] == ALTS_BAD) {
total = 0;
first_ind = i + dir;
continue;
}
total++;
if (total == cnt)
return (first_ind);
}
return (NULL);
}
/*
* bubble sort the entry table into ascending order
*/
static void
ent_sort(buf, cnt)
struct alts_ent buf[];
int cnt;
{
struct alts_ent temp;
int flag;
int i, j;
for (i = 0; i < cnt-1; i++) {
temp = buf[cnt-1];
flag = 1;
for (j = cnt-1; j > i; j--) {
if (buf[j-1].bad_start < temp.bad_start) {
buf[j] = temp;
temp = buf[j-1];
} else {
buf[j] = buf[j-1];
flag = 0;
}
}
buf[i] = temp;
if (flag) break;
}
}
/*
* compress all the contiguous bad sectors into a single entry
* in the entry table. The entry table must be sorted into ascending
* before the compression.
*/
static void
ent_compress(buf, cnt)
struct alts_ent buf[];
int cnt;
{
int keyp;
int movp;
int i;
for (i = 0; i < cnt; i++) {
if (buf[i].bad_start == (uint32_t)ALTS_ENT_EMPTY)
continue;
for (keyp = i, movp = i+1; movp < cnt; movp++) {
if (buf[movp].bad_start == (uint32_t)ALTS_ENT_EMPTY)
continue;
if (buf[keyp].bad_end+1 != buf[movp].bad_start)
break;
buf[keyp].bad_end++;
buf[movp].bad_start = (uint32_t)ALTS_ENT_EMPTY;
}
if (movp == cnt) break;
}
}
/*
* merging two entry tables into a single table. In addition,
* all empty slots in the entry table will be removed.
*/
static int
ent_merge(buf, list1, lcnt1, list2, lcnt2)
struct alts_ent buf[];
struct alts_ent list1[];
int lcnt1;
struct alts_ent list2[];
int lcnt2;
{
int i;
int j1, j2;
for (i = 0, j1 = 0, j2 = 0; j1 < lcnt1 && j2 < lcnt2; ) {
if (list1[j1].bad_start == (uint32_t)ALTS_ENT_EMPTY) {
j1++;
continue;
}
if (list2[j2].bad_start == (uint32_t)ALTS_ENT_EMPTY) {
j2++;
continue;
}
if (list1[j1].bad_start < list2[j2].bad_start)
buf[i++] = list1[j1++];
else
buf[i++] = list2[j2++];
}
for (; j1 < lcnt1; j1++) {
if (list1[j1].bad_start == (uint32_t)ALTS_ENT_EMPTY)
continue;
buf[i++] = list1[j1];
}
for (; j2 < lcnt2; j2++) {
if (list2[j2].bad_start == (uint32_t)ALTS_ENT_EMPTY)
continue;
buf[i++] = list2[j2];
}
return (i);
}
/*
* binary search for bad sector in the alternate entry table
*/
static int
ent_bsearch(buf, cnt, key)
struct alts_ent buf[];
int cnt;
struct alts_ent *key;
{
int i;
int ind;
int interval;
int mystatus = -1;
if (!cnt)
return (mystatus);
for (i = 1; i <= cnt; i <<= 1)
ind = i;
for (interval = ind; interval; ) {
if ((key->bad_start >= buf[ind-1].bad_start) &&
(key->bad_start <= buf[ind-1].bad_end)) {
return (mystatus = ind-1);
} else {
interval >>= 1;
if (!interval) break;
if (key->bad_start < buf[ind-1].bad_start) {
ind = ind - interval;
} else {
/* if key is larger than the last element then break */
if (ind == cnt) break;
if ((ind+interval) <= cnt)
ind += interval;
}
}
}
return (mystatus);
}
/*
* check for bad sector in assigned alternate sectors
*/
static int
chk_bad_altsctr(badsec)
blkaddr_t badsec;
{
int i;
blkaddr_t numsec;
int cnt = ap->ap_tblp->alts_ent_used;
/*
* daddr_t intv[3];
*/
for (i = 0; i < cnt; i++) {
numsec = (ap->ap_entp)[i].bad_end - (ap->ap_entp)[i].bad_start;
if ((badsec >= (ap->ap_entp)[i].good_start) &&
(badsec <= ((ap->ap_entp)[i].good_start + numsec))) {
(void) fprintf(stderr,
"Bad sector %ld is an assigned alternate sector.\n", badsec);
return (66);
/*
* if (!numsec) {
* (ap->ap_entp)[i].good_start = 0;
* return (FAILURE);
* }
* intv[0] = badsec - (ap->ap_entp)[i].good_start;
* intv[1] = 1;
* intv[2] = (ap->ap_entp)[i].good_start + numsec - badsec;
*/
}
}
/* the bad sector has already been identified as bad */
return (SUCCESS);
}