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dev.c
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5018 lines (4415 loc) · 153 KB
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/* dev.c - core analysis suite
*
* Copyright (C) 2001, 2002 Mission Critical Linux, Inc.
* Copyright (C) 2002-2013 David Anderson
* Copyright (C) 2002-2013 Red Hat, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "defs.h"
#include "vmcore.h"
static void dump_blkdevs(ulong);
static void dump_chrdevs(ulong);
static void dump_blkdevs_v2(ulong);
static void dump_blkdevs_v3(ulong);
static ulong search_cdev_map_probes(char *, int, int, ulong *);
static ulong search_bdev_map_probes(char *, int, int, ulong *);
static ulong search_blockdev_inodes(int, ulong *);
static void do_pci(void);
static void do_pci2(void);
static void do_io(void);
static void do_resource_list(ulong, char *, int);
static const char *pci_strclass (uint, char *);
static const char *pci_strvendor(uint, char *);
static const char *pci_strdev(uint, uint, char *);
static void diskio_option(ulong flags);
static struct dev_table {
ulong flags;
} dev_table = { 0 };
struct dev_table *dt = &dev_table;
#define DEV_INIT 0x1
#define DISKIO_INIT 0x2
#define DIOF_ALL 1 << 0
#define DIOF_NONZERO 1 << 1
void
dev_init(void)
{
MEMBER_OFFSET_INIT(pci_dev_global_list, "pci_dev", "global_list");
MEMBER_OFFSET_INIT(pci_dev_next, "pci_dev", "next");
MEMBER_OFFSET_INIT(pci_dev_bus, "pci_dev", "bus");
MEMBER_OFFSET_INIT(pci_dev_dev, "pci_dev", "dev");
MEMBER_OFFSET_INIT(pci_dev_devfn, "pci_dev", "devfn");
MEMBER_OFFSET_INIT(pci_dev_class, "pci_dev", "class");
MEMBER_OFFSET_INIT(pci_dev_device, "pci_dev", "device");
MEMBER_OFFSET_INIT(pci_dev_hdr_type, "pci_dev", "hdr_type");
MEMBER_OFFSET_INIT(pci_dev_pcie_flags_reg, "pci_dev", "pcie_flags_reg");
MEMBER_OFFSET_INIT(pci_dev_vendor, "pci_dev", "vendor");
MEMBER_OFFSET_INIT(pci_bus_number, "pci_bus", "number");
MEMBER_OFFSET_INIT(pci_bus_node, "pci_bus", "node");
MEMBER_OFFSET_INIT(pci_bus_devices, "pci_bus", "devices");
MEMBER_OFFSET_INIT(pci_bus_dev, "pci_bus", "dev");
MEMBER_OFFSET_INIT(pci_bus_children, "pci_bus", "children");
MEMBER_OFFSET_INIT(pci_bus_parent, "pci_bus", "parent");
MEMBER_OFFSET_INIT(pci_bus_self, "pci_bus", "self");
MEMBER_OFFSET_INIT(device_kobj, "device", "kobj");
MEMBER_OFFSET_INIT(kobject_name, "kobject", "name");
STRUCT_SIZE_INIT(resource, "resource");
if ((VALID_STRUCT(resource) && symbol_exists("do_resource_list")) ||
(VALID_STRUCT(resource) &&
symbol_exists("iomem_resource") &&
symbol_exists("ioport_resource"))) {
MEMBER_OFFSET_INIT(resource_name, "resource", "name");
MEMBER_OFFSET_INIT(resource_start, "resource", "start");
MEMBER_OFFSET_INIT(resource_end, "resource", "end");
MEMBER_OFFSET_INIT(resource_sibling, "resource", "sibling");
MEMBER_OFFSET_INIT(resource_child, "resource", "child");
} else {
STRUCT_SIZE_INIT(resource_entry_t, "resource_entry_t");
if (VALID_SIZE(resource_entry_t)) {
MEMBER_OFFSET_INIT(resource_entry_t_from,
"resource_entry_t", "from");
MEMBER_OFFSET_INIT(resource_entry_t_num,
"resource_entry_t", "num");
MEMBER_OFFSET_INIT(resource_entry_t_name,
"resource_entry_t", "name");
MEMBER_OFFSET_INIT(resource_entry_t_next,
"resource_entry_t", "next");
}
}
dt->flags |= DEV_INIT;
}
/*
* Generic command for character and block device data.
*/
void
cmd_dev(void)
{
int c;
int dd_index = -1;
char *outputfile = NULL;
ulong flags;
flags = 0;
while ((c = getopt(argcnt, args, "dDpiVv:")) != EOF) {
switch(c)
{
case 'd':
diskio_option(DIOF_ALL);
return;
case 'D':
diskio_option(DIOF_NONZERO);
return;
case 'i':
if (machine_type("S390X"))
option_not_supported(c);
do_io();
return;
case 'p':
if (machine_type("S390X"))
option_not_supported(c);
if (symbol_exists("pci_devices"))
do_pci();
else if (symbol_exists("pci_root_buses"))
do_pci2();
else
option_not_supported(c);
return;
case 'V':
if (KDUMP_DUMPFILE())
kdump_device_dump_info(fp);
else if (DISKDUMP_DUMPFILE())
diskdump_device_dump_info(fp);
else if (ACTIVE())
error(INFO, "-V option not supported on a live system\n");
else
error(INFO, "-V option not supported on this dumpfile type\n");
return;
case 'v':
dd_index = atoi(optarg);
break;
default:
argerrs++;
break;
}
}
if (argerrs)
cmd_usage(pc->curcmd, SYNOPSIS);
while (args[optind]) {
if (dd_index >= 0) {
if (!outputfile)
outputfile = args[optind];
else
cmd_usage(pc->curcmd, SYNOPSIS);
} else
cmd_usage(pc->curcmd, SYNOPSIS);
optind++;
}
if (dd_index >= 0) {
if (KDUMP_DUMPFILE())
kdump_device_dump_extract(dd_index, outputfile, fp);
else if (DISKDUMP_DUMPFILE())
diskdump_device_dump_extract(dd_index, outputfile, fp);
else if (ACTIVE())
error(INFO, "-v option not supported on a live system\n");
else
error(INFO, "-v option not supported on this dumpfile type\n");
return;
}
dump_chrdevs(flags);
fprintf(fp, "\n");
dump_blkdevs(flags);
}
#define MAX_DEV (255)
#define MINORBITS 20
#define MINORMASK ((1U << MINORBITS) - 1)
#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
char *chrdev_hdr = "CHRDEV NAME ";
char *blkdev_hdr = "BLKDEV NAME ";
/*
* Dump the character device data.
*/
static void
dump_chrdevs(ulong flags)
{
int i;
ulong addr, size;
char buf[BUFSIZE];
char buf2[BUFSIZE];
struct chrdevs {
ulong name;
ulong ops;
} chrdevs[MAX_DEV], *cp;
ulong *cdp;
char *char_device_struct_buf;
ulong next, savenext, name, fops, cdev;
int major, minor;
int name_typecode;
size_t name_size;
if (!symbol_exists("chrdevs"))
error(FATAL, "chrdevs: symbol does not exist\n");
addr = symbol_value("chrdevs");
size = VALID_STRUCT(char_device_struct) ?
sizeof(void *) : sizeof(struct chrdevs);
readmem(addr, KVADDR, &chrdevs[0], size * MAX_DEV,
"chrdevs array", FAULT_ON_ERROR);
fprintf(fp, "%s %s", chrdev_hdr, VADDR_PRLEN == 8 ? " " : "");
fprintf(fp, "%s ", mkstring(buf, VADDR_PRLEN, CENTER, "CDEV"));
fprintf(fp, "%s\n", mkstring(buf, VADDR_PRLEN, LJUST, "OPERATIONS"));
if (VALID_STRUCT(char_device_struct))
goto char_device_struct;
for (i = 0, cp = &chrdevs[0]; i < MAX_DEV; i++, cp++) {
if (!cp->ops)
continue;
fprintf(fp, " %3d ", i);
if (cp->name) {
if (read_string(cp->name, buf, BUFSIZE-1))
fprintf(fp, "%-11s ", buf);
else
fprintf(fp, "%-11s ", "(unknown)");
} else
fprintf(fp, "%-11s ", "(unknown)");
sprintf(buf, "%s%%%dlx ",
strlen("OPERATIONS") < VADDR_PRLEN ? " " : " ",
VADDR_PRLEN);
fprintf(fp, buf, cp->ops);
value_to_symstr(cp->ops, buf, 0);
if (strlen(buf))
fprintf(fp, "<%s>", buf);
fprintf(fp, "\n");
}
return;
char_device_struct:
char_device_struct_buf = GETBUF(SIZE(char_device_struct));
cdp = (ulong *)&chrdevs[0];
name_typecode = MEMBER_TYPE("char_device_struct", "name");
name_size = (size_t)MEMBER_SIZE("char_device_struct", "name");
for (i = 0; i < MAX_DEV; i++, cdp++) {
if (!(*cdp))
continue;
readmem(*cdp, KVADDR, char_device_struct_buf,
SIZE(char_device_struct),
"char_device_struct", FAULT_ON_ERROR);
next = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_next));
name = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_name));
switch (name_typecode)
{
case TYPE_CODE_ARRAY:
snprintf(buf, name_size, "%s",
char_device_struct_buf +
OFFSET(char_device_struct_name));
break;
case TYPE_CODE_PTR:
default:
if (!name || !read_string(name, buf, BUFSIZE-1))
break;
}
major = INT(char_device_struct_buf +
OFFSET(char_device_struct_major));
minor = INT(char_device_struct_buf +
OFFSET(char_device_struct_baseminor));
cdev = fops = 0;
if (VALID_MEMBER(char_device_struct_cdev) &&
VALID_STRUCT(cdev)) {
cdev = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_cdev));
if (cdev) {
addr = cdev + OFFSET(cdev_ops);
readmem(addr, KVADDR, &fops,
sizeof(void *),
"cdev ops", FAULT_ON_ERROR);
}
} else {
fops = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_fops));
}
if (!fops)
fops = search_cdev_map_probes(buf, major, minor, &cdev);
if (!fops) {
fprintf(fp, " %3d ", major);
fprintf(fp, "%-13s ", buf);
fprintf(fp, "%s%s\n", VADDR_PRLEN == 8 ? " " : " ",
mkstring(buf, VADDR_PRLEN, CENTER, "(none)"));
} else {
fprintf(fp, " %3d ", major);
fprintf(fp, "%-13s ", buf);
sprintf(buf2, "%s%%%dlx ",
strlen("OPERATIONS") < VADDR_PRLEN ? " " : " ",
VADDR_PRLEN);
fprintf(fp, buf2, cdev);
value_to_symstr(fops, buf2, 0);
if (strlen(buf2))
fprintf(fp, "%s", buf2);
else
fprintf(fp, "%lx", fops);
fprintf(fp, "\n");
}
if (CRASHDEBUG(1))
fprintf(fp,
"%lx: major: %d minor: %d name: %s next: %lx cdev: %lx fops: %lx\n",
*cdp, major, minor, buf, next, cdev, fops);
while (next) {
readmem(savenext = next, KVADDR, char_device_struct_buf,
SIZE(char_device_struct),
"char_device_struct", FAULT_ON_ERROR);
next = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_next));
name = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_name));
switch (name_typecode)
{
case TYPE_CODE_ARRAY:
snprintf(buf, name_size, "%s",
char_device_struct_buf +
OFFSET(char_device_struct_name));
break;
case TYPE_CODE_PTR:
default:
if (!name || !read_string(name, buf, BUFSIZE-1))
sprintf(buf, "(unknown)");
break;
}
major = INT(char_device_struct_buf +
OFFSET(char_device_struct_major));
minor = INT(char_device_struct_buf +
OFFSET(char_device_struct_baseminor));
fops = cdev = 0;
if (VALID_MEMBER(char_device_struct_cdev) &&
VALID_STRUCT(cdev)) {
cdev = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_cdev));
if (cdev) {
addr = cdev + OFFSET(cdev_ops);
readmem(addr, KVADDR, &fops,
sizeof(void *),
"cdev ops", FAULT_ON_ERROR);
}
} else {
fops = ULONG(char_device_struct_buf +
OFFSET(char_device_struct_fops));
}
if (!fops)
fops = search_cdev_map_probes(buf, major, minor, &cdev);
if (!fops) {
fprintf(fp, " %3d ", major);
fprintf(fp, "%-13s ", buf);
fprintf(fp, "%s%s\n", VADDR_PRLEN == 8 ? " " : " ",
mkstring(buf, VADDR_PRLEN, CENTER, "(none)"));
} else {
fprintf(fp, " %3d ", major);
fprintf(fp, "%-13s ", buf);
sprintf(buf2, "%s%%%dlx ",
strlen("OPERATIONS") < VADDR_PRLEN ?
" " : " ", VADDR_PRLEN);
fprintf(fp, buf2, cdev);
value_to_symstr(fops, buf2, 0);
if (strlen(buf2))
fprintf(fp, "%s", buf2);
else
fprintf(fp, "%lx", fops);
fprintf(fp, "\n");
}
if (CRASHDEBUG(1))
fprintf(fp,
"%lx: major: %d minor: %d name: %s next: %lx cdev: %lx fops: %lx\n",
savenext, major, minor, buf, next, cdev, fops);
}
}
FREEBUF(char_device_struct_buf);
}
/*
* Search for a major/minor match by following the list headed
* by the kobj_map.probes[major] array entry. The "data" member
* points to a cdev structure containing the file_operations
* pointer.
*/
static ulong
search_cdev_map_probes(char *name, int major, int minor, ulong *cdev)
{
char *probe_buf;
ulong probes[MAX_DEV];
ulong cdev_map, addr, next, ops, probe_data;
uint probe_dev;
if (kernel_symbol_exists("cdev_map"))
get_symbol_data("cdev_map", sizeof(ulong), &cdev_map);
else
return 0;
addr = cdev_map + OFFSET(kobj_map_probes);
if (!readmem(addr, KVADDR, &probes[0], sizeof(void *) * MAX_DEV,
"cdev_map.probes[]", QUIET|RETURN_ON_ERROR))
return 0;
ops = 0;
probe_buf = GETBUF(SIZE(probe));
next = probes[major];
while (next) {
if (!readmem(next, KVADDR, probe_buf, SIZE(probe),
"struct probe", QUIET|RETURN_ON_ERROR))
break;
probe_dev = UINT(probe_buf + OFFSET(probe_dev));
if ((MAJOR(probe_dev) == major) &&
(MINOR(probe_dev) == minor)) {
probe_data = ULONG(probe_buf + OFFSET(probe_data));
addr = probe_data + OFFSET(cdev_ops);
if (!readmem(addr, KVADDR, &ops, sizeof(void *),
"cdev ops", QUIET|RETURN_ON_ERROR))
ops = 0;
else
*cdev = probe_data;
break;
}
next = ULONG(probe_buf + OFFSET(probe_next));
}
FREEBUF(probe_buf);
return ops;
}
/*
* Dump the block device data.
*/
static void
dump_blkdevs(ulong flags)
{
int i;
ulong addr;
char buf[BUFSIZE];
struct blkdevs {
ulong name;
ulong ops;
} blkdevs[MAX_DEV], *bp;
if (kernel_symbol_exists("major_names") &&
(kernel_symbol_exists("bdev_map") ||
kernel_symbol_exists("blockdev_superblock"))) {
dump_blkdevs_v3(flags);
return;
}
if (symbol_exists("all_bdevs")) {
dump_blkdevs_v2(flags);
return;
}
if (!symbol_exists("blkdevs"))
error(FATAL, "blkdevs or all_bdevs: symbols do not exist\n");
addr = symbol_value("blkdevs");
readmem(addr, KVADDR, &blkdevs[0], sizeof(struct blkdevs) * MAX_DEV,
"blkdevs array", FAULT_ON_ERROR);
fprintf(fp, "%s%s\n", blkdev_hdr,
mkstring(buf, VADDR_PRLEN, CENTER, "OPERATIONS"));
for (i = 0, bp = &blkdevs[0]; i < MAX_DEV; i++, bp++) {
if (!bp->ops)
continue;
fprintf(fp, " %3d ", i);
if (bp->name) {
if (read_string(bp->name, buf, BUFSIZE-1))
fprintf(fp, "%-11s ", buf);
else
fprintf(fp, "%-11s ", "(unknown)");
} else
fprintf(fp, "%-11s ", "(unknown)");
sprintf(buf, "%s%%%dlx ",
strlen("OPERATIONS") < VADDR_PRLEN ? " " : " ",
VADDR_PRLEN);
fprintf(fp, buf, bp->ops);
value_to_symstr(bp->ops, buf, 0);
if (strlen(buf))
fprintf(fp, "<%s>", buf);
fprintf(fp, "\n");
}
}
/*
* block device dump for 2.6
*/
static void
dump_blkdevs_v2(ulong flags)
{
struct list_data list_data, *ld;
ulong *major_fops, *bdevlist, *gendisklist, *majorlist;
int i, j, bdevcnt, len;
char *block_device_buf, *gendisk_buf, *blk_major_name_buf;
ulong next, savenext, fops;
int major, total;
char buf[BUFSIZE];
if (!symbol_exists("major_names"))
error(FATAL,
"major_names[] array doesn't exist in this kernel\n");
len = get_array_length("major_names", NULL, 0);
block_device_buf = GETBUF(SIZE(block_device));
gendisk_buf = GETBUF(SIZE(gendisk));
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
get_symbol_data("all_bdevs", sizeof(void *), &ld->start);
ld->end = symbol_value("all_bdevs");
ld->list_head_offset = OFFSET(block_device_bd_list);
hq_open();
bdevcnt = do_list(ld);
bdevlist = (ulong *)GETBUF(bdevcnt * sizeof(ulong));
gendisklist = (ulong *)GETBUF(bdevcnt * sizeof(ulong));
bdevcnt = retrieve_list(bdevlist, bdevcnt);
hq_close();
total = MAX(len, bdevcnt);
major_fops = (ulong *)GETBUF(sizeof(void *) * total);
/*
* go through the block_device list, emulating:
*
* ret += bdev->bd_inode->i_mapping->nrpages;
*/
for (i = 0; i < bdevcnt; i++) {
readmem(bdevlist[i], KVADDR, block_device_buf,
SIZE(block_device), "block_device buffer",
FAULT_ON_ERROR);
gendisklist[i] = ULONG(block_device_buf +
OFFSET(block_device_bd_disk));
if (CRASHDEBUG(1))
fprintf(fp, "[%d] %lx -> %lx\n",
i, bdevlist[i], gendisklist[i]);
}
for (i = 1; i < bdevcnt; i++) {
for (j = 0; j < i; j++) {
if (gendisklist[i] == gendisklist[j])
gendisklist[i] = 0;
}
}
for (i = 0; i < bdevcnt; i++) {
if (!gendisklist[i])
continue;
readmem(gendisklist[i], KVADDR, gendisk_buf,
SIZE(gendisk), "gendisk buffer",
FAULT_ON_ERROR);
fops = ULONG(gendisk_buf + OFFSET(gendisk_fops));
major = UINT(gendisk_buf + OFFSET(gendisk_major));
strncpy(buf, gendisk_buf + OFFSET(gendisk_disk_name), 32);
if (CRASHDEBUG(1))
fprintf(fp, "%lx: name: [%s] major: %d fops: %lx\n",
gendisklist[i], buf, major, fops);
if (fops && (major < total))
major_fops[major] = fops;
}
FREEBUF(bdevlist);
FREEBUF(gendisklist);
FREEBUF(block_device_buf);
FREEBUF(gendisk_buf);
if (CRASHDEBUG(1))
fprintf(fp, "major_names[%d]\n", len);
majorlist = (ulong *)GETBUF(len * sizeof(void *));
blk_major_name_buf = GETBUF(SIZE(blk_major_name));
readmem(symbol_value("major_names"), KVADDR, &majorlist[0],
sizeof(void *) * len, "major_names array", FAULT_ON_ERROR);
fprintf(fp, "%s%s\n", blkdev_hdr,
mkstring(buf, VADDR_PRLEN, CENTER, "OPERATIONS"));
for (i = 0; i < len; i++) {
if (!majorlist[i])
continue;
readmem(majorlist[i], KVADDR, blk_major_name_buf,
SIZE(blk_major_name), "blk_major_name buffer",
FAULT_ON_ERROR);
major = UINT(blk_major_name_buf +
OFFSET(blk_major_name_major));
buf[0] = NULLCHAR;
strncpy(buf, blk_major_name_buf +
OFFSET(blk_major_name_name), 16);
next = ULONG(blk_major_name_buf +
OFFSET(blk_major_name_next));
if (CRASHDEBUG(1))
fprintf(fp,
"[%d] %lx major: %d name: %s next: %lx fops: %lx\n",
i, majorlist[i], major, buf, next,
major_fops[major]);
fprintf(fp, " %3d ", major);
fprintf(fp, "%-12s ", strlen(buf) ? buf : "(unknown)");
if (major_fops[major]) {
sprintf(buf, "%s%%%dlx ",
strlen("OPERATIONS") < VADDR_PRLEN ? " " : " ",
VADDR_PRLEN);
fprintf(fp, buf, major_fops[major]);
value_to_symstr(major_fops[major], buf, 0);
if (strlen(buf))
fprintf(fp, "<%s>", buf);
} else
fprintf(fp, " (unknown)");
fprintf(fp, "\n");
while (next) {
readmem(savenext = next, KVADDR, blk_major_name_buf,
SIZE(blk_major_name), "blk_major_name buffer",
FAULT_ON_ERROR);
major = UINT(blk_major_name_buf +
OFFSET(blk_major_name_major));
strncpy(buf, blk_major_name_buf +
OFFSET(blk_major_name_name), 16);
next = ULONG(blk_major_name_buf +
OFFSET(blk_major_name_next));
if (CRASHDEBUG(1))
fprintf(fp,
"[%d] %lx major: %d name: %s next: %lx fops: %lx\n",
i, savenext, major, buf, next,
major_fops[major]);
fprintf(fp, " %3d ", major);
fprintf(fp, "%-12s ", strlen(buf) ? buf : "(unknown)");
if (major_fops[major]) {
sprintf(buf, "%s%%%dlx ",
strlen("OPERATIONS") < VADDR_PRLEN ?
" " : " ", VADDR_PRLEN);
fprintf(fp, buf, major_fops[major]);
value_to_symstr(major_fops[major], buf, 0);
if (strlen(buf))
fprintf(fp, "<%s>", buf);
} else
fprintf(fp, " (unknown)");
fprintf(fp, "\n");
}
}
FREEBUF(majorlist);
FREEBUF(major_fops);
FREEBUF(blk_major_name_buf);
}
static void
dump_blkdevs_v3(ulong flags)
{
int i, len;
ulong blk_major_name;
char *blk_major_name_buf;
char buf[BUFSIZE];
uint major;
ulong gendisk, addr, fops;
int use_bdev_map = kernel_symbol_exists("bdev_map");
if (!(len = get_array_length("major_names", NULL, 0)))
len = MAX_DEV;
fprintf(fp, "%s %s", blkdev_hdr, VADDR_PRLEN == 8 ? " " : "");
fprintf(fp, "%s ", mkstring(buf, VADDR_PRLEN, CENTER|RJUST, "GENDISK"));
fprintf(fp, "%s\n", mkstring(buf, VADDR_PRLEN, LJUST, "OPERATIONS"));
blk_major_name_buf = GETBUF(SIZE(blk_major_name));
gendisk = 0;
for (i = 0; i < len; i++) {
addr = symbol_value("major_names") + (i * sizeof(void *));
readmem(addr, KVADDR, &blk_major_name, sizeof(void *),
"major_names[] entry", FAULT_ON_ERROR);
if (!blk_major_name)
continue;
readmem(blk_major_name, KVADDR, blk_major_name_buf,
SIZE(blk_major_name), "blk_major_name", FAULT_ON_ERROR);
major = UINT(blk_major_name_buf +
OFFSET(blk_major_name_major));
buf[0] = NULLCHAR;
strncpy(buf, blk_major_name_buf +
OFFSET(blk_major_name_name), 16);
if (use_bdev_map)
fops = search_bdev_map_probes(buf, major == i ? major : i,
UNUSED, &gendisk);
else /* v5.11 and later */
fops = search_blockdev_inodes(major, &gendisk);
if (CRASHDEBUG(1))
fprintf(fp, "blk_major_name: %lx block major: %d name: %s gendisk: %lx fops: %lx\n",
blk_major_name, major, buf, gendisk, fops);
if (!fops) {
fprintf(fp, " %3d ", major);
fprintf(fp, "%-13s ",
strlen(buf) ? buf : "(unknown)");
fprintf(fp, "%s%s\n", VADDR_PRLEN == 8 ? " " : " ",
mkstring(buf, VADDR_PRLEN, CENTER, "(none)"));
continue;
}
fprintf(fp, " %3d ", major);
fprintf(fp, "%-13s ", strlen(buf) ? buf : "(unknown)");
sprintf(buf, "%s%%%dlx ",
strlen("OPERATIONS") < VADDR_PRLEN ? " " : " ",
VADDR_PRLEN);
fprintf(fp, buf, gendisk);
value_to_symstr(fops, buf, 0);
if (strlen(buf))
fprintf(fp, "%s", buf);
else
fprintf(fp, "%lx", fops);
fprintf(fp, "\n");
}
}
static ulong
search_bdev_map_probes(char *name, int major, int minor, ulong *gendisk)
{
char *probe_buf, *gendisk_buf;
ulong probes[MAX_DEV];
ulong bdev_map, addr, next, probe_data, fops;
uint probe_dev;
get_symbol_data("bdev_map", sizeof(ulong), &bdev_map);
addr = bdev_map + OFFSET(kobj_map_probes);
if (!readmem(addr, KVADDR, &probes[0], sizeof(void *) * MAX_DEV,
"bdev_map.probes[]", QUIET|RETURN_ON_ERROR))
return 0;
probe_buf = GETBUF(SIZE(probe));
gendisk_buf = GETBUF(SIZE(gendisk));
fops = 0;
for (next = probes[major]; next;
next = ULONG(probe_buf + OFFSET(probe_next))) {
if (!readmem(next, KVADDR, probe_buf, SIZE(probe),
"struct probe", QUIET|RETURN_ON_ERROR))
break;
probe_data = ULONG(probe_buf + OFFSET(probe_data));
if (!probe_data)
continue;
probe_dev = UINT(probe_buf + OFFSET(probe_dev));
if (MAJOR(probe_dev) != major)
continue;
if (!readmem(probe_data, KVADDR, gendisk_buf,
SIZE(gendisk), "gendisk buffer",
QUIET|RETURN_ON_ERROR))
break;
fops = ULONG(gendisk_buf + OFFSET(gendisk_fops));
if (fops) {
*gendisk = probe_data;
break;
}
}
FREEBUF(probe_buf);
FREEBUF(gendisk_buf);
return fops;
}
/* For bdev_inode. See block/bdev.c */
#define I_BDEV(inode) (inode - SIZE(block_device))
static ulong
search_blockdev_inodes(int major, ulong *gendisk)
{
struct list_data list_data, *ld;
ulong addr, bd_sb, disk, fops = 0;
int i, inode_count, gendisk_major;
char *gendisk_buf;
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
get_symbol_data("blockdev_superblock", sizeof(void *), &bd_sb);
addr = bd_sb + OFFSET(super_block_s_inodes);
if (!readmem(addr, KVADDR, &ld->start, sizeof(ulong),
"blockdev_superblock.s_inodes", QUIET|RETURN_ON_ERROR))
return 0;
if (empty_list(ld->start))
return 0;
ld->flags |= LIST_ALLOCATE;
ld->end = bd_sb + OFFSET(super_block_s_inodes);
ld->list_head_offset = OFFSET(inode_i_sb_list);
inode_count = do_list(ld);
gendisk_buf = GETBUF(SIZE(gendisk));
for (i = 0; i < inode_count; i++) {
addr = I_BDEV(ld->list_ptr[i]) + OFFSET(block_device_bd_disk);
if (!readmem(addr, KVADDR, &disk, sizeof(ulong),
"block_device.bd_disk", QUIET|RETURN_ON_ERROR))
continue;
if (!disk)
continue;
if (!readmem(disk, KVADDR, gendisk_buf, SIZE(gendisk),
"gendisk buffer", QUIET|RETURN_ON_ERROR))
continue;
gendisk_major = INT(gendisk_buf + OFFSET(gendisk_major));
if (gendisk_major != major)
continue;
fops = ULONG(gendisk_buf + OFFSET(gendisk_fops));
if (fops) {
*gendisk = disk;
break;
}
}
FREEBUF(ld->list_ptr);
FREEBUF(gendisk_buf);
return fops;
}
void
dump_dev_table(void)
{
struct dev_table *dt;
int others;
dt = &dev_table;
others = 0;
fprintf(fp, " flags: %lx (", dt->flags);
if (dt->flags & DEV_INIT)
fprintf(fp, "%sDEV_INIT", others++ ? "|" : "");
if (dt->flags & DISKIO_INIT)
fprintf(fp, "%sDISKIO_INIT", others++ ? "|" : "");
fprintf(fp, ")\n");
}
/*
* Dump the I/O ports.
*/
static void
do_io(void)
{
int i, c, len, wrap, cnt, size;
ulong *resource_list, name, start, end;
char *resource_buf, *p1;
struct list_data list_data, *ld;
char buf1[BUFSIZE];
char buf2[BUFSIZE];
if (symbol_exists("get_ioport_list")) /* linux 2.2 */
goto ioport_list;
if (symbol_exists("do_resource_list")) /* linux 2.4 */
goto resource_list;
if (symbol_exists("iomem_resource") && symbol_exists("ioport_resource"))
goto resource_list;
return;
ioport_list:
/*
* ioport
*/
fprintf(fp, "%s %s NAME\n",
mkstring(buf1, VADDR_PRLEN, CENTER|LJUST, "RESOURCE"),
mkstring(buf2, 9, CENTER|LJUST, "RANGE"));
wrap = VADDR_PRLEN + 2 + 9 + 2;
resource_buf = GETBUF(SIZE(resource_entry_t));
ld = &list_data;
BZERO(ld, sizeof(struct list_data));
ld->start = 0xc026cf20;
readmem(symbol_value("iolist") + OFFSET(resource_entry_t_next),
KVADDR, &ld->start, sizeof(void *), "iolist.next",
FAULT_ON_ERROR);
ld->member_offset = OFFSET(resource_entry_t_next);
hq_open();
cnt = do_list(ld);
if (!cnt)
return;
resource_list = (ulong *)GETBUF(cnt * sizeof(ulong));
cnt = retrieve_list(resource_list, cnt);
hq_close();
for (i = 0; i < cnt; i++) {
fprintf(fp, "%lx ", resource_list[i]);
readmem(resource_list[i], KVADDR, resource_buf,
SIZE(resource_entry_t), "resource_entry_t",
FAULT_ON_ERROR);
start = ULONG(resource_buf + OFFSET(resource_entry_t_from));
end = ULONG(resource_buf + OFFSET(resource_entry_t_num));
end += start;
fprintf(fp, "%04lx-%04lx ", start, end);
name = ULONG(resource_buf + OFFSET(resource_entry_t_name));
if (!read_string(name, buf1, BUFSIZE-1))
sprintf(buf1, "(unknown)");
if (wrap + strlen(buf1) <= 80)
fprintf(fp, "%s\n", buf1);
else {
len = wrap + strlen(buf1) - 80;
for (c = 0, p1 = &buf1[strlen(buf1)-1];
p1 > buf1; p1--, c++) {
if (*p1 != ' ')
continue;
if (c >= len) {
*p1 = NULLCHAR;
break;
}
}
fprintf(fp, "%s\n", buf1);
if (*p1 == NULLCHAR) {
pad_line(fp, wrap, ' ');
fprintf(fp, "%s\n", p1+1);
}
}
}
return;