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kexec-tools/kexec-tools-2.0.4-kexec-i386-Add-cmdline_add_memmap_internal-to-reduce.patch

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Back port 2 revert commits In 2.0.4, Cliff from HP posted 2 patches: e35aa29 kexec: include reserved e820 sections in crash kernel 4932034 kexec: lengthen the kernel command line image However, with both of them kdump kernel may fail to boot, and are useless because of restriction in kernel side. In upstream, they have been reverted. Now back port these 2 revert commits. Also since the commit 1a4e90b has dependency, back port commit dc607e4 which is depended on by commit 1a4e90b too. 1a4e90b Revert "kexec: include reserved e820 sections in crash kernel" dc607e4 kexec: i386: Add cmdline_add_memmap_internal() to reduce the code duplication 8274916 Revert: "kexec: lengthen the kernel command line image"
2013-09-27 08:33:18 +00:00
From dc607e4d43308140b4cee6c4503ee71f32b827ad Mon Sep 17 00:00:00 2001
Message-Id: <dc607e4d43308140b4cee6c4503ee71f32b827ad.1380269355.git.bhe@redhat.com>
From: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Date: Thu, 28 Mar 2013 21:09:59 +0800
Subject: [PATCH] kexec: i386: Add cmdline_add_memmap_internal() to reduce the
code duplication
Functions:
- cmdline_add_memmap()
- cmdline_add_memmap_acpi()
- cmdline_add_memmap_reserved()
is kind of similar, So add a new function cmdline_add_memmap_internal() to
hold the common codes, reducing the duplication.
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Baoquan He <bhe@redhat.com>
---
kexec/arch/i386/crashdump-x86.c | 74 ++++++++++++++++++-----------------------
1 file changed, 33 insertions(+), 41 deletions(-)
diff --git a/kexec/arch/i386/crashdump-x86.c b/kexec/arch/i386/crashdump-x86.c
index 5462f8b..9ab648b 100644
--- a/kexec/arch/i386/crashdump-x86.c
+++ b/kexec/arch/i386/crashdump-x86.c
@@ -685,13 +685,40 @@ static void ultoa(unsigned long i, char *str)
}
}
+static void cmdline_add_memmap_internal(char *cmdline, unsigned long startk,
+ unsigned long endk, int type)
+{
+ int cmdlen, len;
+ char str_mmap[256], str_tmp[20];
+
+ strcpy (str_mmap, " memmap=");
+ ultoa((endk-startk), str_tmp);
+ strcat (str_mmap, str_tmp);
+
+ if (type == RANGE_RAM)
+ strcat (str_mmap, "K@");
+ else if (type == RANGE_RESERVED)
+ strcat (str_mmap, "K$");
+ else if (type == RANGE_ACPI || type == RANGE_ACPI_NVS)
+ strcat (str_mmap, "K#");
+
+ ultoa(startk, str_tmp);
+ strcat (str_mmap, str_tmp);
+ strcat (str_mmap, "K");
+ len = strlen(str_mmap);
+ cmdlen = strlen(cmdline) + len;
+ if (cmdlen > (COMMAND_LINE_SIZE - 1))
+ die("Command line overflow\n");
+ strcat(cmdline, str_mmap);
+}
+
/* Adds the appropriate memmap= options to command line, indicating the
* memory regions the new kernel can use to boot into. */
static int cmdline_add_memmap(char *cmdline, struct memory_range *memmap_p)
{
int i, cmdlen, len;
unsigned long min_sizek = 100;
- char str_mmap[256], str_tmp[20];
+ char str_mmap[256];
/* Exact map */
strcpy(str_mmap, " memmap=exactmap");
@@ -713,18 +740,7 @@ static int cmdline_add_memmap(char *cmdline, struct memory_range *memmap_p)
* up precious command line length. */
if ((endk - startk) < min_sizek)
continue;
- strcpy (str_mmap, " memmap=");
- ultoa((endk-startk), str_tmp);
- strcat (str_mmap, str_tmp);
- strcat (str_mmap, "K@");
- ultoa(startk, str_tmp);
- strcat (str_mmap, str_tmp);
- strcat (str_mmap, "K");
- len = strlen(str_mmap);
- cmdlen = strlen(cmdline) + len;
- if (cmdlen > (COMMAND_LINE_SIZE - 1))
- die("Command line overflow\n");
- strcat(cmdline, str_mmap);
+ cmdline_add_memmap_internal(cmdline, startk, endk, RANGE_RAM);
}
dbgprintf("Command line after adding memmap\n");
@@ -817,27 +833,15 @@ static enum coretype get_core_type(struct crash_elf_info *elf_info,
static int cmdline_add_memmap_acpi(char *cmdline, unsigned long start,
unsigned long end)
{
- int cmdlen, len, align = 1024;
+ int align = 1024;
unsigned long startk, endk;
- char str_mmap[256], str_tmp[20];
if (!(end - start))
return 0;
startk = start/1024;
endk = (end + align - 1)/1024;
- strcpy (str_mmap, " memmap=");
- ultoa((endk - startk), str_tmp);
- strcat (str_mmap, str_tmp);
- strcat (str_mmap, "K#");
- ultoa(startk, str_tmp);
- strcat (str_mmap, str_tmp);
- strcat (str_mmap, "K");
- len = strlen(str_mmap);
- cmdlen = strlen(cmdline) + len;
- if (cmdlen > (COMMAND_LINE_SIZE - 1))
- die("Command line overflow\n");
- strcat(cmdline, str_mmap);
+ cmdline_add_memmap_internal(cmdline, startk, endk, RANGE_ACPI);
dbgprintf("Command line after adding acpi memmap\n");
dbgprintf("%s\n", cmdline);
@@ -907,27 +911,15 @@ static void get_backup_area(struct kexec_info *info,
static int cmdline_add_memmap_reserved(char *cmdline, unsigned long start,
unsigned long end)
{
- int cmdlen, len, align = 1024;
+ int align = 1024;
unsigned long startk, endk;
- char str_mmap[256], str_tmp[20];
if (!(end - start))
return 0;
startk = start/1024;
endk = (end + align - 1)/1024;
- strcpy (str_mmap, " memmap=");
- ultoa((endk - startk), str_tmp);
- strcat (str_mmap, str_tmp);
- strcat (str_mmap, "K$");
- ultoa(startk, str_tmp);
- strcat (str_mmap, str_tmp);
- strcat (str_mmap, "K");
- len = strlen(str_mmap);
- cmdlen = strlen(cmdline) + len;
- if (cmdlen > (COMMAND_LINE_SIZE - 1))
- die("Command line overflow\n");
- strcat(cmdline, str_mmap);
+ cmdline_add_memmap_internal(cmdline, startk, endk, RANGE_RESERVED);
#ifdef DEBUG
printf("Command line after adding reserved memmap\n");
--
1.8.3.1
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