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tools/vm: Switch to liblk library

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page-flags.c had some older version of debugfs_mount copied from perf so
convert it to using the version in the tools library.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Link: http://lkml.kernel.org/r/1361374353-30385-8-git-send-email-bp@alien8.de
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Borislav Petkov 2013-02-20 16:32:33 +01:00 committed by Arnaldo Carvalho de Melo
parent 1355915ac6
commit 5a439645ea
2 changed files with 21 additions and 81 deletions
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17
tools/vm/Makefile
View file

@ -1,11 +1,22 @@
# Makefile for vm tools
#
TARGETS=page-types slabinfo
LK_DIR = ../lib/lk
LIBLK = $(LK_DIR)/liblk.a
CC = $(CROSS_COMPILE)gcc
CFLAGS = -Wall -Wextra
CFLAGS = -Wall -Wextra -I../lib/
LDFLAGS = $(LIBLK)
$(TARGETS): liblk
liblk:
make -C $(LK_DIR)
all: page-types slabinfo
%: %.c
$(CC) $(CFLAGS) -o $@ $^
$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
clean:
$(RM) page-types slabinfo
make -C ../lib/lk clean

85
tools/vm/page-types.c
View file

@ -36,7 +36,7 @@
#include <sys/statfs.h>
#include "../../include/uapi/linux/magic.h"
#include "../../include/uapi/linux/kernel-page-flags.h"
#include <lk/debugfs.h>
#ifndef MAX_PATH
# define MAX_PATH 256
@ -178,7 +178,7 @@ static int kpageflags_fd;
static int opt_hwpoison;
static int opt_unpoison;
static char hwpoison_debug_fs[MAX_PATH+1];
static char *hwpoison_debug_fs;
static int hwpoison_inject_fd;
static int hwpoison_forget_fd;
@ -458,81 +458,6 @@ static uint64_t kpageflags_flags(uint64_t flags)
return flags;
}
/* verify that a mountpoint is actually a debugfs instance */
static int debugfs_valid_mountpoint(const char *debugfs)
{
struct statfs st_fs;
if (statfs(debugfs, &st_fs) < 0)
return -ENOENT;
else if (st_fs.f_type != (long) DEBUGFS_MAGIC)
return -ENOENT;
return 0;
}
/* find the path to the mounted debugfs */
static const char *debugfs_find_mountpoint(void)
{
const char *const *ptr;
char type[100];
FILE *fp;
ptr = debugfs_known_mountpoints;
while (*ptr) {
if (debugfs_valid_mountpoint(*ptr) == 0) {
strcpy(hwpoison_debug_fs, *ptr);
return hwpoison_debug_fs;
}
ptr++;
}
/* give up and parse /proc/mounts */
fp = fopen("/proc/mounts", "r");
if (fp == NULL)
perror("Can't open /proc/mounts for read");
while (fscanf(fp, "%*s %"
STR(MAX_PATH)
"s %99s %*s %*d %*d\n",
hwpoison_debug_fs, type) == 2) {
if (strcmp(type, "debugfs") == 0)
break;
}
fclose(fp);
if (strcmp(type, "debugfs") != 0)
return NULL;
return hwpoison_debug_fs;
}
/* mount the debugfs somewhere if it's not mounted */
static void debugfs_mount(void)
{
const char *const *ptr;
/* see if it's already mounted */
if (debugfs_find_mountpoint())
return;
ptr = debugfs_known_mountpoints;
while (*ptr) {
if (mount(NULL, *ptr, "debugfs", 0, NULL) == 0) {
/* save the mountpoint */
strcpy(hwpoison_debug_fs, *ptr);
break;
}
ptr++;
}
if (*ptr == NULL) {
perror("mount debugfs");
exit(EXIT_FAILURE);
}
}
/*
* page actions
*/
@ -541,7 +466,11 @@ static void prepare_hwpoison_fd(void)
{
char buf[MAX_PATH + 1];
debugfs_mount();
hwpoison_debug_fs = debugfs_mount(NULL);
if (!hwpoison_debug_fs) {
perror("mount debugfs");
exit(EXIT_FAILURE);
}
if (opt_hwpoison && !hwpoison_inject_fd) {
snprintf(buf, MAX_PATH, "%s/hwpoison/corrupt-pfn",