| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 22 Dec 2017 02:22:44 -0700
From: Andreas Dilger <adilger@...ger.ca>
To: tytso@....edu
Cc: linux-ext4@...r.kernel.org, Shuichi Ihara <sihara@....com>,
Li Xi <lixi@....com>, Wang Shilong <wshilong@....com>,
Andreas Dilger <adilger@...ger.ca>
Subject: [PATCH] misc: add e2mmpstatus utility
From: Shuichi Ihara <sihara@....com>
e2mmpstatus is an MMP helper utility to read status from an MMP block.
It outputs the latest MMP updated nodename and time for the device.
Signed-off-by: Shuichi Ihara <sihara@....com>
Signed-off-by: Li Xi <lixi@....com>
Signed-off-by: Wang Shilong <wshilong@....com>
Signed-off-by: Andreas Dilger <adilger@...ger.ca>
---
.gitignore | 2 +
configure | 36 ++++++-
configure.ac | 27 +++++
e2fsprogs.spec.in | 2 +
lib/config.h.in | 15 ++-
lib/ext2fs/mmp.c | 4 +-
misc/Makefile.in | 25 ++++-
misc/e2mmpstatus.8.in | 57 +++++++++++
misc/e2mmpstatus.c | 234 +++++++++++++++++++++++++++++++++++++++++++
tests/m_mmp_bad_csum/expect | 5 +
tests/m_mmp_bad_csum/script | 1 +
tests/m_mmp_bad_magic/expect | 5 +
tests/m_mmp_bad_magic/script | 1 +
tests/test_config | 1 +
14 files changed, 405 insertions(+), 10 deletions(-)
create mode 100644 misc/e2mmpstatus.8.in
create mode 100644 misc/e2mmpstatus.c
diff --git a/.gitignore b/.gitignore
index d3bcefc..30fd9cc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -169,6 +169,8 @@ misc/e2image
misc/e2image.8
misc/e2initrd_helper
misc/e2label.8
+misc/e2mmpstatus
+misc/e2mmpstatus.8
misc/e2undo
misc/e2undo.8
misc/e4defrag
diff --git a/configure b/configure
index b2701d2..110f010 100755
--- a/configure
+++ b/configure
@@ -736,6 +736,8 @@ TDB_CMT
UUIDD_CMT
E2INITRD_MAN
E2INITRD_PROG
+E2MMPSTATUS_MAN
+E2MMPSTATUS_PROG
FSCK_MAN
FSCK_PROG
DEFRAG_CMT
@@ -875,6 +877,7 @@ enable_imager
enable_resizer
enable_defrag
enable_fsck
+enable_e2mmpstatus
enable_e2initrd_helper
enable_tls
enable_uuidd
@@ -1549,6 +1552,7 @@ Optional Features:
--disable-resizer disable support of e2resize program
--disable-defrag disable support of e4defrag program
--enable-fsck build fsck wrapper program
+ --enable-e2mmpstatus build e2mmpstatus program
--enable-e2initrd-helper build e2initrd-helper program
--disable-tls disable use of thread local support
--disable-uuidd disable building the uuid daemon
@@ -5782,6 +5786,36 @@ fi
+# Check whether --enable-e2mmpstatus was given.
+if test "${enable_e2mmpstatus+set}" = set; then :
+ enableval=$enable_e2mmpstatus; if test "$enableval" = "no"
+then
+ E2MMPSTATUS_PROG='' E2MMPSTATUS_MAN=''
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: Not building e2mmpstatus" >&5
+$as_echo "Not building e2mmpstatus" >&6; }
+else
+ E2MMPSTATUS_PROG=e2mmpstatus E2MMPSTATUS_MAN=e2mmpstatus.8
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: Building e2mmpstatus" >&5
+$as_echo "Building e2mmpstatus" >&6; }
+fi
+
+else
+ case "$host_os" in
+ gnu*)
+ E2MMPSTATUS_PROG='' E2MMPSTATUS_MAN=''
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: No e2mmpstatus by default" >&5
+$as_echo "No e2mmpstatus by default" >&6; }
+ ;;
+ *)
+ E2MMPSTATUS_PROG=e2mmpstatus E2MMPSTATUS_MAN=e2mmpstatus.8
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: Building e2mmpstatus by default" >&5
+$as_echo "Building e2mmpstatus by default" >&6; }
+esac
+
+fi
+
+
+
# Check whether --enable-e2initrd-helper was given.
if test "${enable_e2initrd_helper+set}" = set; then :
enableval=$enable_e2initrd_helper; if test "$enableval" = "no"
@@ -13097,7 +13131,7 @@ fi
if test -n "$DLOPEN_LIB" ; then
ac_cv_func_dlopen=yes
fi
-for ac_func in __secure_getenv add_key backtrace blkid_probe_get_topology blkid_probe_enable_partitions chflags dlopen fadvise64 fallocate fallocate64 fchown fcntl fdatasync fstat64 fsync ftruncate64 futimes getcwd getdtablesize getmntinfo getpwuid_r getrlimit getrusage jrand48 keyctl llistxattr llseek lseek64 mallinfo mbstowcs memalign mempcpy mmap msync nanosleep open64 pathconf posix_fadvise posix_fadvise64 posix_memalign prctl pread pwrite pread64 pwrite64 secure_getenv setmntent setresgid setresuid snprintf srandom stpcpy strcasecmp strdup strnlen strptime strtoull sync_file_range sysconf usleep utime utimes valloc
+for ac_func in __secure_getenv add_key backtrace blkid_probe_get_topology blkid_probe_enable_partitions chflags dlopen fadvise64 fallocate fallocate64 fchown fcntl fdatasync fstat64 fsync ftruncate64 futimes getcwd getdtablesize gethostname getmntinfo getpwuid_r getrlimit getrusage jrand48 keyctl llistxattr llseek lseek64 mallinfo mbstowcs memalign mempcpy mmap msync nanosleep open64 pathconf posix_fadvise posix_fadvise64 posix_memalign prctl pread pwrite pread64 pwrite64 secure_getenv setmntent setresgid setresuid snprintf srandom stpcpy strcasecmp strdup strnlen strptime strtoull sync_file_range sysconf usleep utime utimes valloc
do :
as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
diff --git a/configure.ac b/configure.ac
index 7392959..cfb5911 100644
--- a/configure.ac
+++ b/configure.ac
@@ -685,6 +685,32 @@ esac]
AC_SUBST(FSCK_PROG)
AC_SUBST(FSCK_MAN)
dnl
+dnl See whether to install the `e2mmpstatus' program
+dnl
+AC_ARG_ENABLE([e2mmpstatus],
+[ --enable-e2mmpstatus build e2mmpstatus program],
+[if test "$enableval" = "no"
+then
+ E2MMPSTATUS_PROG='' E2MMPSTATUS_MAN=''
+ AC_MSG_RESULT([Not building e2mmpstatus])
+else
+ E2MMPSTATUS_PROG=e2mmpstatus E2MMPSTATUS_MAN=e2mmpstatus.8
+ AC_MSG_RESULT([Building e2mmpstatus])
+fi]
+,
+[case "$host_os" in
+ gnu*)
+ E2MMPSTATUS_PROG='' E2MMPSTATUS_MAN=''
+ AC_MSG_RESULT([No e2mmpstatus by default])
+ ;;
+ *)
+ E2MMPSTATUS_PROG=e2mmpstatus E2MMPSTATUS_MAN=e2mmpstatus.8
+ AC_MSG_RESULT([Building e2mmpstatus by default])
+esac]
+)
+AC_SUBST(E2MMPSTATUS_PROG)
+AC_SUBST(E2MMPSTATUS_MAN)
+dnl
dnl See whether to install the `e2initrd-helper' program
dnl
AC_ARG_ENABLE([e2initrd-helper],
@@ -1124,6 +1150,7 @@ AC_CHECK_FUNCS(m4_flatten([
futimes
getcwd
getdtablesize
+ gethostname
getmntinfo
getpwuid_r
getrlimit
diff --git a/e2fsprogs.spec.in b/e2fsprogs.spec.in
index b188b75..f42c4be 100644
--- a/e2fsprogs.spec.in
+++ b/e2fsprogs.spec.in
@@ -116,6 +116,7 @@ exit 0
%{_root_sbindir}/e2fsck
%{_root_sbindir}/e2image
%{_root_sbindir}/e2label
+%{_root_sbindir}/e2mmpstatus
%{_root_sbindir}/e2undo
%{_root_sbindir}/findfs
%{_root_sbindir}/fsck
@@ -167,6 +168,7 @@ exit 0
%{_mandir}/man8/fsck.ext4dev.8*
%{_mandir}/man8/e2image.8*
%{_mandir}/man8/e2label.8*
+%{_mandir}/man8/e2mmpstatus.8*
%{_mandir}/man8/e2undo.8*
%{_mandir}/man8/fsck.8*
%{_mandir}/man8/logsave.8*
diff --git a/lib/config.h.in b/lib/config.h.in
index 9cc0793..67a0548 100644
--- a/lib/config.h.in
+++ b/lib/config.h.in
@@ -147,6 +147,9 @@
/* Define to 1 if you have the `fchown' function. */
#undef HAVE_FCHOWN
+/* Define to 1 if you have the `fcntl' function. */
+#undef HAVE_FCNTL
+
/* Define to 1 if you have the `fdatasync' function. */
#undef HAVE_FDATASYNC
@@ -156,6 +159,9 @@
/* Define to 1 if you have the `fstat64' function. */
#undef HAVE_FSTAT64
+/* Define to 1 if you have the `fsync' function. */
+#undef HAVE_FSYNC
+
/* Define to 1 if you have the `ftruncate64' function. */
#undef HAVE_FTRUNCATE64
@@ -183,6 +189,9 @@
/* Define to 1 if you have the `getgid' function. */
#undef HAVE_GETGID
+/* Define to 1 if you have the `gethostname' function. */
+#undef HAVE_GETHOSTNAME
+
/* Define to 1 if you have the `getmntinfo' function. */
#undef HAVE_GETMNTINFO
@@ -253,6 +262,9 @@
/* Define to 1 if you have the <linux/major.h> header file. */
#undef HAVE_LINUX_MAJOR_H
+/* Define to 1 if you have the <linux/types.h> header file. */
+#undef HAVE_LINUX_TYPES_H
+
/* Define to 1 if you have the `llistxattr' function. */
#undef HAVE_LLISTXATTR
@@ -470,9 +482,6 @@
/* Define to 1 if you have the `sync_file_range' function. */
#undef HAVE_SYNC_FILE_RANGE
-/* Define to 1 if you have the 'fsync' function. */
-#undef HAVE_FSYNC
-
/* Define to 1 if you have the `sysconf' function. */
#undef HAVE_SYSCONF
diff --git a/lib/ext2fs/mmp.c b/lib/ext2fs/mmp.c
index 9a771de..85bd8ff 100644
--- a/lib/ext2fs/mmp.c
+++ b/lib/ext2fs/mmp.c
@@ -194,7 +194,7 @@ static errcode_t ext2fs_mmp_reset(ext2_filsys fs)
mmp_s->mmp_magic = EXT4_MMP_MAGIC;
mmp_s->mmp_seq = EXT4_MMP_SEQ_CLEAN;
mmp_s->mmp_time = 0;
-#if _BSD_SOURCE || _XOPEN_SOURCE >= 500
+#ifdef HAVE_GETHOSTNAME
gethostname(mmp_s->mmp_nodename, sizeof(mmp_s->mmp_nodename));
#else
mmp_s->mmp_nodename[0] = '\0';
@@ -332,7 +332,7 @@ clean_seq:
goto mmp_error;
mmp_s->mmp_seq = seq = ext2fs_mmp_new_seq();
-#if _BSD_SOURCE || _XOPEN_SOURCE >= 500
+#ifdef HAVE_GETHOSTNAME
gethostname(mmp_s->mmp_nodename, sizeof(mmp_s->mmp_nodename));
#else
strcpy(mmp_s->mmp_nodename, "unknown host");
diff --git a/misc/Makefile.in b/misc/Makefile.in
index 6f631eb..d7f9ceb 100644
--- a/misc/Makefile.in
+++ b/misc/Makefile.in
@@ -33,13 +33,14 @@ INSTALL = @INSTALL@
@FUSE_CMT@...E_PROG= fuse2fs
SPROGS= mke2fs badblocks tune2fs dumpe2fs $(BLKID_PROG) logsave \
- $(E2IMAGE_PROG) @FSCK_PROG@ e2undo
+ $(E2IMAGE_PROG) @FSCK_PROG@ @E2MMPSTATUS_PROG@ e2undo
USPROGS= mklost+found filefrag e2freefrag $(UUIDD_PROG) \
$(E4DEFRAG_PROG) $(E4CRYPT_PROG) $(FUSE_PROG)
SMANPAGES= tune2fs.8 mklost+found.8 mke2fs.8 dumpe2fs.8 badblocks.8 \
e2label.8 $(FINDFS_MAN) $(BLKID_MAN) $(E2IMAGE_MAN) \
logsave.8 filefrag.8 e2freefrag.8 e2undo.8 \
- $(UUIDD_MAN) $(E4DEFRAG_MAN) $(E4CRYPT_MAN) @FSCK_MAN@
+ $(UUIDD_MAN) $(E4DEFRAG_MAN) $(E4CRYPT_MAN) @FSCK_MAN@ \
+ @E2MMPSTATUS_MAN@
FMANPAGES= mke2fs.conf.5 ext4.5
UPROGS= chattr lsattr @UUID_CMT@ uuidgen
@@ -67,6 +68,7 @@ E4DEFRAG_OBJS= e4defrag.o
E4CRYPT_OBJS= e4crypt.o
E2FREEFRAG_OBJS= e2freefrag.o
E2FUZZ_OBJS= e2fuzz.o
+E2MMPSTATUS_OBJS= e2mmpstatus.o
FUSE2FS_OBJS= fuse2fs.o journal.o recovery.o revoke.o
PROFILED_TUNE2FS_OBJS= profiled/tune2fs.o profiled/util.o profiled/journal.o \
@@ -91,6 +93,7 @@ PROFILED_E2FREEFRAG_OBJS= profiled/e2freefrag.o
PROFILED_E2UNDO_OBJS= profiled/e2undo.o
PROFILED_E4DEFRAG_OBJS= profiled/e4defrag.o
PROFILED_E4CRYPT_OBJS= profiled/e4crypt.o
+PROFILED_E2MMPSTATUS_OBJS= profiled/e2mmpstatus.o
PROFILED_FUSE2FS_OJBS= profiled/fuse2fs.o profiled/journal.o \
profiled/recovery.o profiled/revoke.o
@@ -101,7 +104,7 @@ SRCS= $(srcdir)/tune2fs.c $(srcdir)/mklost+found.c $(srcdir)/mke2fs.c $(srcdir)/
$(srcdir)/filefrag.c $(srcdir)/base_device.c \
$(srcdir)/ismounted.c $(srcdir)/e2undo.c \
$(srcdir)/e2freefrag.c $(srcdir)/create_inode.c \
- $(srcdir)/fuse2fs.c \
+ $(srcdir)/e2mmpstatus.c $(srcdir)/fuse2fs.c \
$(srcdir)/../debugfs/journal.c $(srcdir)/../e2fsck/revoke.c \
$(srcdir)/../e2fsck/recovery.c
@@ -137,7 +140,7 @@ all:: profiled $(SPROGS) $(UPROGS) $(USPROGS) $(SMANPAGES) $(UMANPAGES) \
e2undo.profiled mke2fs.profiled dumpe2fs.profiled fsck.profiled \
logsave.profiled filefrag.profiled uuidgen.profiled $(UUIDD_PROFILED) \
e2image.profiled e4defrag.profiled e4crypt.profiled \
- e2freefrag.profiled
+ e2freefrag.profiled e2mmpstatus.profiled
profiled:
@PROFILE_CMT@ $(E) " MKDIR $@"
@@ -247,6 +250,16 @@ e4crypt.profiled: $(E4CRYPT_OBJS) $(DEPPROFILED_LIBUUID) $(PROFILED_DEPLIBS)
$(PROFILED_E4CRYPT_OBJS) $(PROFILED_LIBUUID) $(PROFILED_LIBS) \
$(SYSLIBS)
+e2mmpstatus: $(E2MMPSTATUS_OBJS) $(DEPLIBBLKID)
+ $(E) " LD $@"
+ $(Q) $(CC) $(ALL_LDFLAGS) -o e2mmpstatus $(E2MMPSTATUS_OBJS) \
+ $(LIBBLKID) $(LIBINTL) $(LIBS)
+
+e2mmpstatus.profiled: $(E2MMPSTATUS_OBJS) $(PROFILED_DEPLIBBLKID)
+ $(E) " LD $@"
+ $(Q) $(CC) $(ALL_LDFLAGS) -g -pg -o e2mmpstatus.profiled \
+ $(PROFILED_E2MMPSTATUS_OBJS) $(PROFILED_LIBBLKID) $(LIBINTL)
+
base_device: base_device.c
$(E) " LD $@"
$(Q) $(CC) $(ALL_CFLAGS) $(ALL_LDFLAGS) $(srcdir)/base_device.c \
@@ -459,6 +472,10 @@ e4crypt.8: $(DEP_SUBSTITUTE) $(srcdir)/e4crypt.8.in
$(E) " SUBST $@"
$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/e4crypt.8.in e4crypt.8
+e2mmpstatus.8: $(DEP_SUBSTITUTE) $(srcdir)/e2mmpstatus.8.in
+ $(E) " SUBST $@"
+ $(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/e2mmpstatus.8.in e2mmpstatus.8
+
dumpe2fs.8: $(DEP_SUBSTITUTE) $(srcdir)/dumpe2fs.8.in
$(E) " SUBST $@"
$(Q) $(SUBSTITUTE_UPTIME) $(srcdir)/dumpe2fs.8.in dumpe2fs.8
diff --git a/misc/e2mmpstatus.8.in b/misc/e2mmpstatus.8.in
new file mode 100644
index 0000000..805fa19
--- /dev/null
+++ b/misc/e2mmpstatus.8.in
@@ -0,0 +1,57 @@
+.\" -*- nroff -*-
+.\" This file may be copied under the terms of the GNU Public License.
+.\"
+.TH E2MMPSTATUS 8 "@E2FSPROGS_MONTH@ @E2FSPROGS_YEAR@" "E2fsprogs version @E2FSPROGS_VERSION@"
+.SH NAME
+e2mmpstatus \- Check MMP status of an ext4 filesystem
+.SH SYNOPSIS
+.B e2mmpstatus
+.RB [ \-i | \--info ]
+.RI < filesystem >
+.SH OPTIONS
+.TP
+.B \-i, \--info
+prints out the MMP information rather than check it.
+.SH DESCRIPTION
+.B e2mmpstatus
+is used to check Multiple-Mount Protection (MMP) status of an ext4 file
+system with the
+.B mmp
+feature enabled. The
+.I filesystem
+can be a device name (e.g.
+.IR /dev/hdc1 ", " /dev/sdb2 ),
+or an ext4 filesystem label or UUID, for example
+.B UUID=8868abf6-88c5-4a83-98b8-bfc24057f7bd
+or
+.BR LABEL=root .
+By default, the
+.B e2mmpstatus
+program checks whether it is safe to mount the filesystem without taking
+the risk of mounting it more than once.
+.PP
+MMP (multiple-mount protection) is a feature that protects
+the filesystem from being mounted simultaneously to more than one node.
+It is NOT safe to mount a filesystem when one of the following condition
+is true:
+.br
+\ 1. The MMP block shows that fsck is running on the filesystem.
+.br
+\ 2. The MMP block is being updated by another node.
+.br
+The
+.B e2mmpstatus
+program might wait for some time to see whether MMP is updated by any node
+during this period. The time taken depends on how often the MMP block is
+being written by the other node.
+.SH RETURN CODE
+The exit code returned by
+.B e2mmpstatus
+is 0 when it is safe to mount the filesystem, 1 when it is NOT safe to mount
+the filesystem, and 2 on some other failure. When
+.B \-i
+flag is specified, the exit code
+is 0 on success, 2 on failure.
+.SH SEE ALSO
+.BR fstab (5),
+.BR fsck (8),
diff --git a/misc/e2mmpstatus.c b/misc/e2mmpstatus.c
new file mode 100644
index 0000000..b269daa
--- /dev/null
+++ b/misc/e2mmpstatus.c
@@ -0,0 +1,234 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (C) 2012 DataDirect Networks, Inc.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <time.h>
+#include <getopt.h>
+#include <sys/time.h>
+#include "ext2fs/ext2fs.h"
+#include "blkid/blkid.h"
+
+#ifndef min
+#define min(x, y) ((x) < (y) ? (x) : (y))
+#endif
+
+int check_mmp(const char *program, ext2_filsys filesystem, int dump)
+{
+ struct ext2_super_block *sb;
+ struct mmp_struct *mmp_s;
+ unsigned int interval;
+ __u32 seq;
+ int ret;
+
+ assert(filesystem);
+ sb = filesystem->super;
+
+ if (filesystem->mmp_buf == NULL) {
+ ret = ext2fs_get_mem(filesystem->blocksize,
+ &filesystem->mmp_buf);
+ if (ret) {
+ fprintf(stderr, "%s: failed to alloc MMP buffer\n",
+ program);
+ ret = 2;
+ goto out;
+ }
+ }
+
+ mmp_s = filesystem->mmp_buf;
+ ret = ext2fs_mmp_read(filesystem, filesystem->super->s_mmp_block,
+ filesystem->mmp_buf);
+
+ if (ret) {
+ fprintf(stderr, "%s: failed to read MMP block\n", program);
+ ret = 2;
+ goto out;
+ }
+
+ if (dump) {
+ time_t mmp_time = mmp_s->mmp_time;
+ char *ctimep, *ctimelf;
+
+ fprintf(stdout, "MMP_information:\n");
+ fprintf(stdout, " mmp_magic: 0x%x\n", mmp_s->mmp_magic);
+ fprintf(stdout, " block_number: %llu\n",
+ filesystem->super->s_mmp_block);
+ fprintf(stdout, " update_interval: %d\n",
+ filesystem->super->s_mmp_update_interval);
+ fprintf(stdout, " check_interval: %d\n",
+ mmp_s->mmp_check_interval);
+ fprintf(stdout, " sequence: %08x\n", mmp_s->mmp_seq);
+ fprintf(stdout, " update_seconds: %lld\n", mmp_s->mmp_time);
+ ctimep = ctime(&mmp_time);
+ ctimelf = strchr(ctimep, '\n');
+ if (ctimelf) /* this should always be true */
+ *ctimelf = '\0';
+ fprintf(stdout, " update_time: \"%s\"\n", ctimep);
+ fprintf(stdout, " node_name: %s\n", mmp_s->mmp_nodename);
+ fprintf(stdout, " device_name: %s\n", mmp_s->mmp_bdevname);
+ } else {
+ if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN) {
+ fprintf(stdout,
+ "%s: it is safe to mount '%s', MMP is clean\n",
+ program, mmp_s->mmp_bdevname);
+ ret = 1;
+ goto out;
+ } else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK) {
+ fprintf(stdout, "%s: filesystem '%s' used by e2fsck\n",
+ program, mmp_s->mmp_nodename);
+ ret = 0;
+ goto out;
+ }
+ seq = mmp_s->mmp_seq;
+
+ interval = filesystem->super->s_mmp_update_interval;
+ if (interval < mmp_s->mmp_check_interval)
+ interval = mmp_s->mmp_check_interval;
+ interval = min(interval * 2 + 1, interval + 60);
+ assert(interval > 0);
+
+ fprintf(stderr, "%s: wait for %d seconds to check MMP\n",
+ program, interval);
+ sleep(interval);
+
+ ret = ext2fs_mmp_read(filesystem,
+ filesystem->super->s_mmp_block,
+ filesystem->mmp_buf);
+ if (ret) {
+ fprintf(stderr, "%s: failed to read '%s' MMP block\n",
+ program, mmp_s->mmp_bdevname);
+ ret = 2;
+ goto out;
+ }
+
+ if (mmp_s->mmp_seq == EXT4_MMP_SEQ_CLEAN) {
+ fprintf(stdout, "%s: it is safe to mount '%s', "
+ "MMP became clean while checking\n",
+ program, mmp_s->mmp_bdevname);
+ ret = 0;
+ } else if (mmp_s->mmp_seq == EXT4_MMP_SEQ_FSCK) {
+ fprintf(stdout,
+ "%s: e2fsck started on '%s' while checking\n",
+ program, mmp_s->mmp_bdevname);
+ ret = 1;
+ } else if (mmp_s->mmp_seq == seq) {
+ fprintf(stdout,
+ "%s: it is safe to mount '%s', MMP is idle\n",
+ program, mmp_s->mmp_bdevname);
+ ret = 0;
+ } else {
+ /* MMP updated */
+ fprintf(stdout,
+ "%s: MMP updated by '%s' %u times in %ds\n",
+ program, mmp_s->mmp_nodename,
+ mmp_s->mmp_seq - seq, interval);
+ ret = 1;
+ }
+ }
+
+out:
+ return ret;
+}
+
+void usage(const char *program)
+{
+ fprintf(stderr, "usage: %s [-i|--info] device\n"
+ "\t-i: print out MMP information rather than check status\n",
+ program);
+}
+
+/*
+ * Return 1 when MMP is being updated,
+ * 0 if not, and 2 on falure
+ */
+int main(int argc, char **argv)
+{
+ char *device_name;
+ int open_flags = 0;
+ blk64_t superblock = 0;
+ blk64_t blocksize = 0;
+ ext2_filsys filesystem = NULL;
+ int ret;
+ struct option long_opts[] = {
+ {"info", no_argument, 0, 'i'},
+ {"help", no_argument, 0, 'h'},
+ {0, 0, 0, 0}
+ };
+ int c;
+ int info = 0;
+
+ while ((c = getopt_long_only(argc, argv, "ih",
+ long_opts, NULL)) >= 0) {
+ switch (c) {
+ case 'i':
+ info++;
+ break;
+ case 'h':
+ usage(argv[0]);
+ ret = 2;
+ goto out;
+ default:
+ fprintf(stderr, "%s: option '%s' unrecognized\n",
+ argv[0], argv[optind - 1]);
+ usage(argv[0]);
+ ret = 2;
+ goto out;
+ }
+ }
+
+ if (optind != argc - 1) {
+ usage(argv[0]);
+ ret = 2;
+ goto out;
+ }
+
+ device_name = blkid_get_devname(NULL, argv[optind], NULL);
+ if (device_name == NULL) {
+ fprintf(stderr, "%s: failed to get device for '%s'\n",
+ argv[0], argv[optind]);
+ ret = 2;
+ goto out;
+ }
+
+ ret = ext2fs_open(device_name, open_flags, superblock, blocksize,
+ unix_io_manager, &filesystem);
+ if (ret) {
+ fprintf(stderr, "%s: failed to open filesystem '%s', "
+ "is it a valid ext4 filesystem?\n",
+ argv[0], device_name);
+ ret = 2;
+ goto out_free_device;
+ }
+
+ ret = check_mmp(argv[0], filesystem, info);
+ ext2fs_close(filesystem);
+out_free_device:
+ free(device_name);
+out:
+ assert(ret == 0 || ret == 1 || ret == 2);
+ return ret;
+}
diff --git a/tests/m_mmp_bad_csum/expect b/tests/m_mmp_bad_csum/expect
index e15e7b4..4a71f0e 100644
--- a/tests/m_mmp_bad_csum/expect
+++ b/tests/m_mmp_bad_csum/expect
@@ -7,3 +7,8 @@ Pass 4: Checking reference counts
Pass 5: Checking group summary information
test_filesys: 11/128 files (0.0% non-contiguous), 19/512 blocks
Exit status is 0
+MMP_information:
+ mmp_magic: 0x4d4d50
+ block_number: 8
+ check_interval: 5
+ sequence: ff4d4d50
diff --git a/tests/m_mmp_bad_csum/script b/tests/m_mmp_bad_csum/script
index 09e870c..1ae4051 100644
--- a/tests/m_mmp_bad_csum/script
+++ b/tests/m_mmp_bad_csum/script
@@ -14,6 +14,7 @@ OUT=$test_name.log
EXP=$test_dir/expect
$FSCK -fy $TMPFILE 2>&1 | sed -f $cmd_dir/filter.sed > $OUT
echo Exit status is $? >> $OUT
+$E2MMPSTATUS -i $TMPFILE | egrep -v "node_name:|update_|device_name:" >> $OUT
rm -f $TMPFILE
cmp -s $OUT $EXP
diff --git a/tests/m_mmp_bad_magic/expect b/tests/m_mmp_bad_magic/expect
index b5dfb89..787a1de 100644
--- a/tests/m_mmp_bad_magic/expect
+++ b/tests/m_mmp_bad_magic/expect
@@ -7,3 +7,8 @@ Pass 4: Checking reference counts
Pass 5: Checking group summary information
test_filesys: 11/128 files (0.0% non-contiguous), 19/512 blocks
Exit status is 0
+MMP_information:
+ mmp_magic: 0x4d4d50
+ block_number: 8
+ check_interval: 5
+ sequence: ff4d4d50
diff --git a/tests/m_mmp_bad_magic/script b/tests/m_mmp_bad_magic/script
index 09e870c..1ae4051 100644
--- a/tests/m_mmp_bad_magic/script
+++ b/tests/m_mmp_bad_magic/script
@@ -14,6 +14,7 @@ OUT=$test_name.log
EXP=$test_dir/expect
$FSCK -fy $TMPFILE 2>&1 | sed -f $cmd_dir/filter.sed > $OUT
echo Exit status is $? >> $OUT
+$E2MMPSTATUS -i $TMPFILE | egrep -v "node_name:|update_|device_name:" >> $OUT
rm -f $TMPFILE
cmp -s $OUT $EXP
diff --git a/tests/test_config b/tests/test_config
index c13aa74..fe79c02 100644
--- a/tests/test_config
+++ b/tests/test_config
@@ -18,6 +18,7 @@ RESIZE2FS_EXE="../resize/resize2fs"
RESIZE2FS="$USE_VALGRIND $RESIZE2FS_EXE"
E2UNDO_EXE="../misc/e2undo"
E2UNDO="$USE_VALGRIND $E2UNDO_EXE"
+E2MMPSTATUS="$USE_VALGRIND ../misc/e2mmpstatus"
TEST_REL=../tests/progs/test_rel
TEST_ICOUNT=../tests/progs/test_icount
CRCSUM=../tests/progs/crcsum
--
1.8.0
Powered by blists - more mailing lists