[PATCH] jbd2: If a journal checksum error is detected, propagate the error to ext4

[Theodore Ts'o <tytso@mit.edu>]

If a journal checksum error is detected, the ext4 filesystem will call
ext4_error(), and the mount will either continue, become a read-only
mount, or cause a kernel panic based on the superblock flags
indicating the user's preference of what to do in case of filesystem
corruption being detected.

XXX should we simply fail the mount instead in the panic case?

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
 fs/ext4/super.c          |    6 ++
 fs/jbd2/recovery.c       |    4 ++
 include/linux/jbd2.h     |    3 +
 scripts/package/Makefile |  100 +-----------------------------------
 scripts/package/builddeb |  126 ----------------------------------------------
 5 files changed, 15 insertions(+), 224 deletions(-)
 delete mode 100644 scripts/package/builddeb

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 09d9359..dd56c45 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2189,6 +2189,12 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent)
 	    EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) {
 		if (ext4_load_journal(sb, es, journal_devnum))
 			goto failed_mount3;
+		if (!(sb->s_flags & MS_RDONLY) &&
+		    EXT4_SB(sb)->s_journal->j_failed_commit) {
+			ext4_error(sb, "ext4_fill_super", 
+				   "Journal transaction %u is corrupt",
+				   EXT4_SB(sb)->s_journal->j_failed_commit);
+		}
 	} else if (journal_inum) {
 		if (ext4_create_journal(sb, es, journal_inum))
 			goto failed_mount3;
diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index 7199db5..1ded464 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -611,6 +611,8 @@ static int do_one_pass(journal_t *journal,
 				chksum_err = chksum_seen = 0;
 
 				if (info->end_transaction) {
+					journal->j_failed_commit =
+						info->end_transaction;
 					printk(KERN_ERR "JBD: Transaction %u "
 						"found to be corrupt.\n",
 						next_commit_ID - 1);
@@ -648,6 +650,8 @@ static int do_one_pass(journal_t *journal,
 						       "JBD: Transaction %u "
 						       "found to be corrupt.\n",
 						       next_commit_ID);
+						journal->j_failed_commit = 
+							next_commit_ID;
 						brelse(bh);
 						break;
 					}
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 05e2b30..d147f0f 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -919,6 +919,9 @@ struct journal_s
 	struct proc_dir_entry	*j_proc_entry;
 	struct transaction_stats_s j_stats;
 
+	/* Failed journal commit ID */
+	unsigned int		j_failed_commit;
+
 	/*
 	 * An opaque pointer to fs-private information.  ext3 puts its
 	 * superblock pointer here
diff --git a/scripts/package/Makefile b/scripts/package/Makefile
index 5e32607..f758b75 100644
--- a/scripts/package/Makefile
+++ b/scripts/package/Makefile
@@ -1,98 +1,2 @@
-# Makefile for the different targets used to generate full packages of a kernel
-# It uses the generic clean infrastructure of kbuild
-
-# Ignore the following files/directories during tar operation
-TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS
-
-
-# RPM target
-# ---------------------------------------------------------------------------
-# The rpm target generates two rpm files:
-# /usr/src/packages/SRPMS/kernel-2.6.7rc2-1.src.rpm
-# /usr/src/packages/RPMS/i386/kernel-2.6.7rc2-1.<arch>.rpm
-# The src.rpm files includes all source for the kernel being built
-# The <arch>.rpm includes kernel configuration, modules etc.
-#
-# Process to create the rpm files
-# a) clean the kernel
-# b) Generate .spec file
-# c) Build a tar ball, using symlink to make kernel version
-#    first entry in the path
-# d) and pack the result to a tar.gz file
-# e) generate the rpm files, based on kernel.spec
-# - Use /. to avoid tar packing just the symlink
-
-# Do we have rpmbuild, otherwise fall back to the older rpm
-RPM := $(shell if [ -x "/usr/bin/rpmbuild" ]; then echo rpmbuild; \
-	           else echo rpm; fi)
-
-# Remove hyphens since they have special meaning in RPM filenames
-KERNELPATH := kernel-$(subst -,,$(KERNELRELEASE))
-MKSPEC     := $(srctree)/scripts/package/mkspec
-PREV       := set -e; cd ..;
-
-# rpm-pkg
-# ---------------------------------------------------------------------------
-$(objtree)/kernel.spec: $(MKSPEC) $(srctree)/Makefile
-	$(CONFIG_SHELL) $(MKSPEC) > $@
-
-rpm-pkg rpm: $(objtree)/kernel.spec FORCE
-	$(MAKE) clean
-	$(PREV) ln -sf $(srctree) $(KERNELPATH)
-	$(PREV) tar -cz $(RCS_TAR_IGNORE) -f $(KERNELPATH).tar.gz $(KERNELPATH)/.
-	$(PREV) rm $(KERNELPATH)
-
-	set -e; \
-	$(CONFIG_SHELL) $(srctree)/scripts/mkversion > $(objtree)/.tmp_version
-	set -e; \
-	mv -f $(objtree)/.tmp_version $(objtree)/.version
-
-	$(RPM) --target $(UTS_MACHINE) -ta ../$(KERNELPATH).tar.gz
-	rm ../$(KERNELPATH).tar.gz
-
-clean-files := $(objtree)/kernel.spec
-
-# binrpm-pkg
-# ---------------------------------------------------------------------------
-$(objtree)/binkernel.spec: $(MKSPEC) $(srctree)/Makefile
-	$(CONFIG_SHELL) $(MKSPEC) prebuilt > $@
-
-binrpm-pkg: $(objtree)/binkernel.spec FORCE
-	$(MAKE) KBUILD_SRC=
-	set -e; \
-	$(CONFIG_SHELL) $(srctree)/scripts/mkversion > $(objtree)/.tmp_version
-	set -e; \
-	mv -f $(objtree)/.tmp_version $(objtree)/.version
-
-	$(RPM) --define "_builddir $(srctree)" --target $(UTS_MACHINE) -bb $<
-
-clean-files += $(objtree)/binkernel.spec
-
-# Deb target
-# ---------------------------------------------------------------------------
-deb-pkg: FORCE
-	$(MAKE) KBUILD_SRC=
-	$(CONFIG_SHELL) $(srctree)/scripts/package/builddeb
-
-clean-dirs += $(objtree)/debian/
-
-
-# tarball targets
-# ---------------------------------------------------------------------------
-tar%pkg: FORCE
-	$(MAKE) KBUILD_SRC=
-	$(CONFIG_SHELL) $(srctree)/scripts/package/buildtar $@
-
-clean-dirs += $(objtree)/tar-install/
-
-
-# Help text displayed when executing 'make help'
-# ---------------------------------------------------------------------------
-help: FORCE
-	@echo '  rpm-pkg         - Build both source and binary RPM kernel packages'
-	@echo '  binrpm-pkg      - Build only the binary kernel package'
-	@echo '  deb-pkg         - Build the kernel as an deb package'
-	@echo '  tar-pkg         - Build the kernel as an uncompressed tarball'
-	@echo '  targz-pkg       - Build the kernel as a gzip compressed tarball'
-	@echo '  tarbz2-pkg      - Build the kernel as a bzip2 compressed tarball'
-
+# Dummy file 
+help:
diff --git a/scripts/package/builddeb b/scripts/package/builddeb
deleted file mode 100644
index ba6bf5d..0000000
--- a/scripts/package/builddeb
+++ /dev/null
@@ -1,126 +0,0 @@
-#!/bin/sh
-#
-# builddeb 1.2
-# Copyright 2003 Wichert Akkerman <wichert@wiggy.net>
-#
-# Simple script to generate a deb package for a Linux kernel. All the
-# complexity of what to do with a kernel after it is installer or removed
-# is left to other scripts and packages: they can install scripts in the
-# /etc/kernel/{pre,post}{inst,rm}.d/ directories that will be called on
-# package install and removal.
-
-set -e
-
-# Some variables and settings used throughout the script
-version=$KERNELRELEASE
-revision=`cat .version`
-tmpdir="$objtree/debian/tmp"
-packagename=linux-$version
-
-if [ "$ARCH" == "um" ] ; then
-	packagename=user-mode-linux-$version
-fi
-
-# Setup the directory structure
-rm -rf "$tmpdir"
-mkdir -p "$tmpdir/DEBIAN" "$tmpdir/lib" "$tmpdir/boot"
-if [ "$ARCH" == "um" ] ; then
-	mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/share/doc/$packagename" "$tmpdir/usr/bin"
-fi
-
-# Build and install the kernel
-if [ "$ARCH" == "um" ] ; then
-	$MAKE linux
-	cp System.map "$tmpdir/usr/lib/uml/modules/$version/System.map"
-	cp .config "$tmpdir/usr/share/doc/$packagename/config"
-	gzip "$tmpdir/usr/share/doc/$packagename/config"
-	cp $KBUILD_IMAGE "$tmpdir/usr/bin/linux-$version"
-else 
-	cp System.map "$tmpdir/boot/System.map-$version"
-	cp .config "$tmpdir/boot/config-$version"
-	cp $KBUILD_IMAGE "$tmpdir/boot/vmlinuz-$version"
-fi
-
-if grep -q '^CONFIG_MODULES=y' .config ; then
-	INSTALL_MOD_PATH="$tmpdir" make KBUILD_SRC= modules_install
-	if [ "$ARCH" == "um" ] ; then
-		mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/"
-		rmdir "$tmpdir/lib/modules/$version"
-	fi
-fi
-
-# Install the maintainer scripts
-for script in postinst postrm preinst prerm ; do
-	mkdir -p "$tmpdir/etc/kernel/$script.d"
-	cat <<EOF > "$tmpdir/DEBIAN/$script"
-#!/bin/sh
-
-set -e
-
-test -d /etc/kernel/$script.d && run-parts --arg="$version" /etc/kernel/$script.d
-exit 0
-EOF
-	chmod 755 "$tmpdir/DEBIAN/$script"
-done
-
-name="Kernel Compiler <$(id -nu)@$(hostname -f)>"
-# Generate a simple changelog template
-cat <<EOF > debian/changelog
-linux ($version-$revision) unstable; urgency=low
-
-  * A standard release
-
- -- $name  $(date -R)
-EOF
-
-# Generate a control file
-if [ "$ARCH" == "um" ]; then
-
-cat <<EOF > debian/control
-Source: linux
-Section: base
-Priority: optional
-Maintainer: $name
-Standards-Version: 3.6.1
-
-Package: $packagename
-Provides: kernel-image-$version, linux-image-$version
-Architecture: any
-Description: User Mode Linux kernel, version $version
- User-mode Linux is a port of the Linux kernel to its own system call
- interface.  It provides a kind of virtual machine, which runs Linux
- as a user process under another Linux kernel.  This is useful for
- kernel development, sandboxes, jails, experimentation, and
- many other things.
- .
- This package contains the Linux kernel, modules and corresponding other
- files version $version
-EOF
-
-else
-cat <<EOF > debian/control
-Source: linux
-Section: base
-Priority: optional
-Maintainer: $name
-Standards-Version: 3.6.1
-
-Package: $packagename
-Provides: kernel-image-$version, linux-image-$version
-Architecture: any
-Description: Linux kernel, version $version
- This package contains the Linux kernel, modules and corresponding other
- files version $version
-EOF
-fi
-
-# Fix some ownership and permissions
-chown -R root:root "$tmpdir"
-chmod -R go-w "$tmpdir"
-
-# Perform the final magic
-dpkg-gencontrol -isp
-dpkg --build "$tmpdir" ..
-
-exit 0