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crash/lkcd_v5.c

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/* lkcd_v5.c - core analysis suite
*
* Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
* Copyright (C) 2002, 2003, 2004, 2005 David Anderson
* Copyright (C) 2002, 2003, 2004, 2005 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.
*/
#define LKCD_COMMON
#include "defs.h"
#include "lkcd_dump_v5.h"
static dump_header_t dump_header_v5 = { 0 };
static dump_page_t dump_page = { 0 };
static void mclx_cache_page_headers_v5(void);
/*
* Verify and initialize the LKCD environment, storing the common data
* in the global lkcd_environment structure.
*/
int
lkcd_dump_init_v5(FILE *fp, int fd)
{
int i;
int eof;
uint32_t pgcnt;
dump_header_t *dh;
dump_page_t *dp;
lkcd->fd = fd;
lkcd->fp = fp;
lseek(lkcd->fd, 0, SEEK_SET);
dh = &dump_header_v5;
dp = &dump_page;
if (read(lkcd->fd, dh, sizeof(dump_header_t)) !=
sizeof(dump_header_t))
return FALSE;
lkcd->dump_page = dp;
lkcd->dump_header = dh;
if (lkcd->debug)
dump_lkcd_environment(LKCD_DUMP_HEADER_ONLY);
/*
* Allocate and clear the benchmark offsets, one per megabyte.
*/
lkcd->page_size = dh->dh_page_size;
lkcd->page_shift = ffs(lkcd->page_size) - 1;
lkcd->bits = sizeof(long) * 8;
lkcd->benchmark_pages = (dh->dh_num_pages/LKCD_PAGES_PER_MEGABYTE())+1;
lkcd->total_pages = dh->dh_num_pages;
lkcd->zone_shift = ffs(ZONE_SIZE) - 1;
lkcd->zone_mask = ~(ZONE_SIZE - 1);
lkcd->num_zones = 0;
lkcd->max_zones = 0;
lkcd->zoned_offsets = 0;
lkcd->get_dp_flags = get_dp_flags_v5;
lkcd->get_dp_address = get_dp_address_v5;
lkcd->compression = dh->dh_dump_compress;
lkcd->page_header_size = sizeof(dump_page_t);
lkcd->get_dp_size = get_dp_size_v5;
lseek(lkcd->fd, LKCD_OFFSET_TO_FIRST_PAGE, SEEK_SET);
for (pgcnt = 0, eof = FALSE; !eof; pgcnt++) {
switch (lkcd_load_dump_page_header(dp, pgcnt))
{
case LKCD_DUMPFILE_OK:
case LKCD_DUMPFILE_END:
break;
case LKCD_DUMPFILE_EOF:
lkcd_print("reached EOF\n");
eof = TRUE;
continue;
}
if (dp->dp_flags &
~(DUMP_DH_COMPRESSED|DUMP_DH_RAW|DUMP_DH_END|LKCD_DUMP_MCLX_V0)) {
lkcd_print("unknown page flag in dump: %lx\n",
dp->dp_flags);
}
if (dp->dp_flags & (LKCD_DUMP_MCLX_V0|LKCD_DUMP_MCLX_V1))
lkcd->flags |= LKCD_MCLX;
if (dp->dp_size > 4096) {
lkcd_print("dp_size > 4096: %d\n", dp->dp_size);
dump_lkcd_environment(LKCD_DUMP_PAGE_ONLY);
}
if (dp->dp_flags & DUMP_DH_END) {
lkcd_print("found DUMP_DH_END\n");
break;
}
lseek(lkcd->fd, dp->dp_size, SEEK_CUR);
if (!LKCD_DEBUG(2))
break;
}
/*
* Allocate space for LKCD_CACHED_PAGES data pages plus one to
* contain a copy of the compressed data of the current page.
*/
if ((lkcd->page_cache_buf = (char *)malloc
(dh->dh_page_size * (LKCD_CACHED_PAGES))) == NULL)
return FALSE;
/*
* Clear the page data areas.
*/
lkcd_free_memory();
for (i = 0; i < LKCD_CACHED_PAGES; i++) {
lkcd->page_cache_hdr[i].pg_bufptr =
&lkcd->page_cache_buf[i * dh->dh_page_size];
}
if ((lkcd->compressed_page = (char *)malloc(dh->dh_page_size)) == NULL)
return FALSE;
if ((lkcd->page_hash = (struct page_hash_entry *)calloc
(LKCD_PAGE_HASH, sizeof(struct page_hash_entry))) == NULL)
return FALSE;
lkcd->total_pages = eof || (pgcnt > dh->dh_num_pages) ?
pgcnt : dh->dh_num_pages;
lkcd->panic_task = (ulong)dh->dh_current_task;
lkcd->panic_string = (char *)&dh->dh_panic_string[0];
if (dh->dh_version & LKCD_DUMP_MCLX_V1)
mclx_cache_page_headers_v5();
if (!fp)
lkcd->flags |= LKCD_REMOTE;
lkcd->flags |= LKCD_VALID;
return TRUE;
}
/*
* Return the current page's dp_size.
*/
uint32_t
get_dp_size_v5(void)
{
dump_page_t *dp;
dp = (dump_page_t *)lkcd->dump_page;
return(dp->dp_size);
}
/*
* Return the current page's dp_flags.
*/
uint32_t
get_dp_flags_v5(void)
{
dump_page_t *dp;
dp = (dump_page_t *)lkcd->dump_page;
return(dp->dp_flags);
}
/*
* Return the current page's dp_address.
*/
uint64_t
get_dp_address_v5(void)
{
dump_page_t *dp;
dp = (dump_page_t *)lkcd->dump_page;
return(dp->dp_address);
}
/*
* help -S output, or as specified by arg.
*/
void
dump_lkcd_environment_v5(ulong arg)
{
int others;
dump_header_t *dh;
dump_page_t *dp;
dh = (dump_header_t *)lkcd->dump_header;
dp = (dump_page_t *)lkcd->dump_page;
if (arg == LKCD_DUMP_HEADER_ONLY)
goto dump_header_only;
if (arg == LKCD_DUMP_PAGE_ONLY)
goto dump_page_only;
dump_header_only:
lkcd_print(" dump_header:\n");
lkcd_print(" dh_magic_number: ");
lkcd_print(BITS32() ? "%llx " : "%lx ", dh->dh_magic_number);
if (dh->dh_magic_number == DUMP_MAGIC_NUMBER)
lkcd_print("(DUMP_MAGIC_NUMBER)\n");
else if (dh->dh_magic_number == DUMP_MAGIC_LIVE)
lkcd_print("(DUMP_MAGIC_LIVE)\n");
else
lkcd_print("(?)\n");
others = 0;
lkcd_print(" dh_version: ");
lkcd_print(BITS32() ? "%lx (" : "%x (", dh->dh_version);
switch (dh->dh_version & LKCD_DUMP_VERSION_NUMBER_MASK)
{
case LKCD_DUMP_V1:
lkcd_print("%sLKCD_DUMP_V1", others++ ? "|" : "");
break;
case LKCD_DUMP_V2:
lkcd_print("%sLKCD_DUMP_V2", others++ ? "|" : "");
break;
case LKCD_DUMP_V3:
lkcd_print("%sLKCD_DUMP_V3", others++ ? "|" : "");
break;
case LKCD_DUMP_V5:
lkcd_print("%sLKCD_DUMP_V5", others++ ? "|" : "");
break;
}
if (dh->dh_version & LKCD_DUMP_MCLX_V0)
lkcd_print("%sLKCD_DUMP_MCLX_V0", others++ ? "|" : "");
if (dh->dh_version & LKCD_DUMP_MCLX_V1)
lkcd_print("%sLKCD_DUMP_MCLX_V1", others++ ? "|" : "");
lkcd_print(")\n");
lkcd_print(" dh_header_size: ");
lkcd_print(BITS32() ? "%ld\n" : "%d\n", dh->dh_header_size);
lkcd_print(" dh_dump_level: ");
lkcd_print(BITS32() ? "%lx (" : "%x (", dh->dh_dump_level);
others = 0;
if (dh->dh_dump_level & DUMP_LEVEL_HEADER)
lkcd_print("%sDUMP_LEVEL_HEADER", others++ ? "|" : "");
if (dh->dh_dump_level & DUMP_LEVEL_KERN)
lkcd_print("%sDUMP_LEVEL_KERN", others++ ? "|" : "");
if (dh->dh_dump_level & DUMP_LEVEL_USED)
lkcd_print("%sDUMP_LEVEL_USED", others++ ? "|" : "");
if (dh->dh_dump_level & DUMP_LEVEL_ALL)
lkcd_print("%sDUMP_LEVEL_ALL", others++ ? "|" : "");
lkcd_print(")\n");
lkcd_print(" dh_page_size: ");
lkcd_print(BITS32() ? "%ld\n" : "%d\n", dh->dh_page_size);
lkcd_print(" dh_memory_size: ");
lkcd_print(BITS32() ? "%lld\n" : "%ld\n", dh->dh_memory_size);
lkcd_print(" dh_memory_start: ");
lkcd_print(BITS32() ? "%llx\n" : "%lx\n", dh->dh_memory_start);
lkcd_print(" dh_memory_end: ");
lkcd_print(BITS32() ? "%llx\n" : "%lx\n", dh->dh_memory_end);
lkcd_print(" dh_num_pages: ");
lkcd_print(BITS32() ? "%ld\n" : "%d\n", dh->dh_num_pages);
lkcd_print(" dh_panic_string: %s%s", dh->dh_panic_string,
dh && strstr(dh->dh_panic_string, "\n") ? "" : "\n");
lkcd_print(" dh_time: %s\n",
strip_linefeeds(ctime(&(dh->dh_time.tv_sec))));
lkcd_print("dh_utsname_sysname: %s\n", dh->dh_utsname_sysname);
lkcd_print("dh_utsname_nodename: %s\n", dh->dh_utsname_nodename);
lkcd_print("dh_utsname_release: %s\n", dh->dh_utsname_release);
lkcd_print("dh_utsname_version: %s\n", dh->dh_utsname_version);
lkcd_print("dh_utsname_machine: %s\n", dh->dh_utsname_machine);
lkcd_print("dh_utsname_domainname: %s\n", dh->dh_utsname_domainname);
lkcd_print(" dh_current_task: %lx\n", dh->dh_current_task);
lkcd_print(" dh_dump_compress: ");
lkcd_print(BITS32() ? "%lx (" : "%x (", dh->dh_dump_compress);
others = 0;
if (dh->dh_dump_compress == DUMP_COMPRESS_NONE)
lkcd_print("%sDUMP_COMPRESS_NONE", others++ ? "|" : "");
if (dh->dh_dump_compress & DUMP_COMPRESS_RLE)
lkcd_print("%sDUMP_COMPRESS_RLE", others++ ? "|" : "");
if (dh->dh_dump_compress & DUMP_COMPRESS_GZIP)
lkcd_print("%sDUMP_COMPRESS_GZIP", others++ ? "|" : "");
lkcd_print(")\n");
lkcd_print(" dh_dump_flags: ");
others = 0;
lkcd_print(BITS32() ? "%lx (" : "%x (", dh->dh_dump_flags);
if (dh->dh_dump_flags & DUMP_FLAGS_NONDISRUPT)
lkcd_print("%sDUMP_FLAGS_NONDISRUPT", others++ ? "|" : "");
lkcd_print(")\n");
lkcd_print(" dh_dump_device: ");
lkcd_print(BITS32() ? "%lx\n" : "%x\n", dh->dh_dump_device);
if (arg == LKCD_DUMP_HEADER_ONLY)
return;
dump_page_only:
lkcd_print(" dump_page:\n");
lkcd_print(" dp_address: ");
lkcd_print(BITS32() ? "%llx\n" : "%lx\n", dp->dp_address);
lkcd_print(" dp_size: ");
lkcd_print(BITS32() ? "%ld\n" : "%d\n", dp->dp_size);
lkcd_print(" dp_flags: ");
lkcd_print(BITS32() ? "%lx (" : "%x (", dp->dp_flags);
others = 0;
if (dp->dp_flags & DUMP_DH_COMPRESSED)
lkcd_print("DUMP_DH_COMPRESSED", others++);
if (dp->dp_flags & DUMP_DH_RAW)
lkcd_print("%sDUMP_DH_RAW", others++ ? "|" : "");
if (dp->dp_flags & DUMP_DH_END)
lkcd_print("%sDUMP_DH_END", others++ ? "|" : "");
if (dp->dp_flags & LKCD_DUMP_MCLX_V0)
lkcd_print("%sLKCD_DUMP_MCLX_V0", others++ ? "|" : "");
lkcd_print(")\n");
}
void
dump_dump_page_v5(char *s, void *dpp)
{
dump_page_t *dp;
uint32_t flags;
int others;
console(s);
dp = (dump_page_t *)dpp;
others = 0;
console(BITS32() ? "dp_address: %llx " : "dp_address: %lx ",
dp->dp_address);
console("dp_size: %ld ", dp->dp_size);
console("dp_flags: %lx (", flags = dp->dp_flags);
if (flags & DUMP_DH_COMPRESSED)
console("DUMP_DH_COMPRESSED", others++);
if (flags & DUMP_DH_RAW)
console("%sDUMP_DH_RAW", others++ ? "|" : "");
if (flags & DUMP_DH_END)
console("%sDUMP_DH_END", others++ ? "|" : "");
if (flags & LKCD_DUMP_MCLX_V0)
console("%sLKCD_DUMP_MCLX_V0", others++ ? "|" : "");
console(")\n");
}
/*
* Read the MCLX-enhanced page header cache. Verify the first one, which
* is a pointer to the page header for address 1MB, and take the rest at
* blind faith. Note that the page headers do not include the 64K dump
* header offset, which must be added to the values found.
*/
static void
mclx_cache_page_headers_v5(void)
{
int i;
uint64_t physaddr1, physaddr2, page_headers[MCLX_PAGE_HEADERS];
dump_page_t dump_page, *dp;
ulong granularity;
if (LKCD_DEBUG(2)) /* dump headers have all been read */
return;
if (lkcd->total_pages > MEGABYTES(1))/* greater than 4G not supported */
return;
if (lseek(lkcd->fd, sizeof(dump_header_t), SEEK_SET) == -1)
return;
if (read(lkcd->fd, page_headers, MCLX_V1_PAGE_HEADER_CACHE) !=
MCLX_V1_PAGE_HEADER_CACHE)
return;
dp = &dump_page;
/*
* Determine the granularity between offsets.
*/
if (lseek(lkcd->fd, page_headers[0] + LKCD_OFFSET_TO_FIRST_PAGE,
SEEK_SET) == -1)
return;
if (read(lkcd->fd, dp, lkcd->page_header_size) !=
lkcd->page_header_size)
return;
physaddr1 = (dp->dp_address - lkcd->kvbase) << lkcd->page_shift;
if (lseek(lkcd->fd, page_headers[1] + LKCD_OFFSET_TO_FIRST_PAGE,
SEEK_SET) == -1)
return;
if (read(lkcd->fd, dp, lkcd->page_header_size)
!= lkcd->page_header_size)
return;
physaddr2 = (dp->dp_address - lkcd->kvbase) << lkcd->page_shift;
if ((physaddr1 % MEGABYTES(1)) || (physaddr2 % MEGABYTES(1)) ||
(physaddr2 < physaddr1))
return;
granularity = physaddr2 - physaddr1;
for (i = 0; i < (MCLX_PAGE_HEADERS-1); i++) {
if (!page_headers[i])
break;
lkcd->curhdroffs = page_headers[i] + LKCD_OFFSET_TO_FIRST_PAGE;
set_mb_benchmark((granularity * (i+1))/lkcd->page_size);
}
}
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