dd4aba9f57
It uses new API from the part.c to work with partition tables. Update userboot's disk driver to use new API. Note that struct loader_callbacks_v1 has changed.
303 lines
7.3 KiB
C
303 lines
7.3 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* Copyright (c) 2012 Andrey V. Elsukov <ae@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/disk.h>
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#include <stand.h>
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#include <stdarg.h>
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#include <bootstrap.h>
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#include <part.h>
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#include "disk.h"
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#ifdef DISK_DEBUG
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# define DEBUG(fmt, args...) printf("%s: " fmt "\n" , __func__ , ## args)
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#else
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# define DEBUG(fmt, args...)
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#endif
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struct open_disk {
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struct ptable *table;
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off_t mediasize;
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u_int sectorsize;
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};
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struct print_args {
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struct disk_devdesc *dev;
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const char *prefix;
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int verbose;
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};
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/* Convert size to a human-readable number. */
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static char *
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display_size(uint64_t size, u_int sectorsize)
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{
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static char buf[80];
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char unit;
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size = size * sectorsize / 1024;
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unit = 'K';
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if (size >= 10485760000LL) {
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size /= 1073741824;
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unit = 'T';
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} else if (size >= 10240000) {
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size /= 1048576;
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unit = 'G';
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} else if (size >= 10000) {
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size /= 1024;
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unit = 'M';
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}
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sprintf(buf, "%ld%cB", (long)size, unit);
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return (buf);
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}
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static int
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ptblread(void *d, void *buf, size_t blocks, off_t offset)
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{
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struct disk_devdesc *dev;
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struct open_disk *od;
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dev = (struct disk_devdesc *)d;
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od = (struct open_disk *)dev->d_opendata;
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return (dev->d_dev->dv_strategy(dev, F_READ, offset,
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blocks * od->sectorsize, (char *)buf, NULL));
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}
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#define PWIDTH 35
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static void
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ptable_print(void *arg, const char *pname, const struct ptable_entry *part)
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{
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struct print_args *pa, bsd;
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struct open_disk *od;
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struct ptable *table;
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char line[80];
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pa = (struct print_args *)arg;
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od = (struct open_disk *)pa->dev->d_opendata;
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sprintf(line, " %s%s: %s", pa->prefix, pname,
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parttype2str(part->type));
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if (pa->verbose)
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sprintf(line, "%-*s%s", PWIDTH, line,
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display_size(part->end - part->start + 1,
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od->sectorsize));
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strcat(line, "\n");
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pager_output(line);
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if (part->type == PART_FREEBSD) {
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/* Open slice with BSD label */
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pa->dev->d_offset = part->start;
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table = ptable_open(pa->dev, part->end - part->start + 1,
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od->sectorsize, ptblread);
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if (table == NULL)
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return;
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sprintf(line, " %s%s", pa->prefix, pname);
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bsd.dev = pa->dev;
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bsd.prefix = line;
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bsd.verbose = pa->verbose;
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ptable_iterate(table, &bsd, ptable_print);
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ptable_close(table);
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}
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}
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#undef PWIDTH
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void
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disk_print(struct disk_devdesc *dev, char *prefix, int verbose)
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{
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struct open_disk *od;
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struct print_args pa;
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/* Disk should be opened */
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od = (struct open_disk *)dev->d_opendata;
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pa.dev = dev;
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pa.prefix = prefix;
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pa.verbose = verbose;
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ptable_iterate(od->table, &pa, ptable_print);
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}
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int
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disk_open(struct disk_devdesc *dev, off_t mediasize, u_int sectorsize)
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{
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struct open_disk *od;
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struct ptable *table;
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struct ptable_entry part;
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int rc;
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od = (struct open_disk *)malloc(sizeof(struct open_disk));
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if (od == NULL) {
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DEBUG("no memory");
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return (ENOMEM);
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}
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/*
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* While we are reading disk metadata, make sure we do it relative
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* to the start of the disk
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*/
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rc = 0;
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table = NULL;
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dev->d_offset = 0;
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dev->d_opendata = od;
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od->mediasize = mediasize;
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od->sectorsize = sectorsize;
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DEBUG("open '%s', unit %d slice %d partition %d",
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disk_fmtdev(dev), dev->d_unit, dev->d_slice, dev->d_partition);
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/* Determine disk layout. */
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od->table = ptable_open(dev, mediasize / sectorsize, sectorsize,
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ptblread);
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if (od->table == NULL) {
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DEBUG("Can't read partition table");
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rc = ENXIO;
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goto out;
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}
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if (dev->d_slice > 0) {
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/* Try to get information about partition */
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rc = ptable_getpart(od->table, &part, dev->d_slice);
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if (rc != 0) /* Partition doesn't exist */
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goto out;
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dev->d_offset = part.start;
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if (dev->d_partition == -1 ||
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dev->d_partition == 255)
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goto out; /* Nothing more to do */
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/* Try to read BSD label */
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table = ptable_open(dev, part.end - part.start + 1,
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od->sectorsize, ptblread);
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if (table == NULL) {
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DEBUG("Can't read BSD label");
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rc = ENXIO;
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goto out;
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}
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rc = ptable_getpart(table, &part, dev->d_partition);
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if (rc != 0)
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goto out;
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dev->d_offset += part.start;
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} else if (dev->d_slice == 0) {
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rc = ptable_getbestpart(od->table, &part);
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if (rc != 0)
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goto out;
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/* Save the slice number of best partition to dev */
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dev->d_slice = part.index;
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dev->d_offset = part.start;
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}
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out:
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if (table != NULL)
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ptable_close(table);
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if (rc != 0) {
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if (od->table != NULL)
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ptable_close(od->table);
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free(od);
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}
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return (rc);
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}
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int
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disk_close(struct disk_devdesc *dev)
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{
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struct open_disk *od;
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od = (struct open_disk *)dev->d_opendata;
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ptable_close(od->table);
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free(od);
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return (0);
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}
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char*
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disk_fmtdev(struct disk_devdesc *dev)
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{
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static char buf[128];
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char *cp;
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cp = buf + sprintf(buf, "%s%d", dev->d_dev->dv_name, dev->d_unit);
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if (dev->d_slice > 0) {
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#ifdef LOADER_GPT_SUPPORT
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if (dev->d_partition == 255) {
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sprintf(cp, "p%d:", dev->d_slice);
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return (buf);
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} else
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#endif
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#ifdef LOADER_MBR_SUPPORT
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cp += sprintf(cp, "s%d", dev->d_slice);
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#endif
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if (dev->d_partition >= 0)
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cp += sprintf(cp, "%c", dev->d_partition + 'a');
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}
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strcat(cp, ":");
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return (buf);
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}
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int
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disk_parsedev(struct disk_devdesc *dev, const char *devspec, const char **path)
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{
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int unit, slice, partition;
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const char *np;
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char *cp;
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np = devspec;
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unit = slice = partition = -1;
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if (*np != '\0' && *np != ':') {
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unit = strtol(np, &cp, 10);
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if (cp == np)
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return (EUNIT);
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#ifdef LOADER_GPT_SUPPORT
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if (*cp == 'p') {
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np = cp + 1;
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slice = strtol(np, &cp, 10);
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if (np == cp)
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return (ESLICE);
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/* we don't support nested partitions on GPT */
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if (*cp != '\0' && *cp != ':')
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return (EINVAL);
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partition = 255;
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} else
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#endif
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#ifdef LOADER_MBR_SUPPORT
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if (*cp == 's') {
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np = cp + 1;
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slice = strtol(np, &cp, 10);
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if (np == cp)
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return (ESLICE);
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}
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#endif
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if (*cp != '\0' && *cp != ':') {
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partition = *cp - 'a';
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if (partition < 0)
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return (EPART);
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cp++;
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}
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} else
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return (EINVAL);
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if (*cp != '\0' && *cp != ':')
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return (EINVAL);
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dev->d_unit = unit;
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dev->d_slice = slice;
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dev->d_partition = partition;
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if (path != NULL)
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*path = (*cp == '\0') ? cp: cp + 1;
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return (0);
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}
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