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Date: Wed, 31 Aug 2011 17:36:02 -0700
From: "Darrick J. Wong" <djwong@...ibm.com>
To: Andreas Dilger <adilger.kernel@...ger.ca>,
Theodore Tso <tytso@....edu>,
"Darrick J. Wong" <djwong@...ibm.com>
Cc: Sunil Mushran <sunil.mushran@...cle.com>,
Amir Goldstein <amir73il@...il.com>,
Andi Kleen <andi@...stfloor.org>,
Mingming Cao <cmm@...ibm.com>,
Joel Becker <jlbec@...lplan.org>, linux-ext4@...r.kernel.org,
Coly Li <colyli@...il.com>
Subject: [PATCH 08/37] tune2fs: Add inode checksum support
This patch adds to tune2fs the ability to toggle the metadata checksum rocompat
feature flag, which will rewrite the inode table with checksums.
Signed-off-by: Darrick J. Wong <djwong@...ibm.com>
---
misc/tune2fs.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 75 insertions(+), 2 deletions(-)
diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 82833ad..283ad1d 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -82,6 +82,7 @@ static int stride_set, stripe_width_set;
static char *extended_cmd;
static unsigned long new_inode_size;
static char *ext_mount_opts;
+static int rewrite_checksums;
int journal_size, journal_flags;
char *journal_device;
@@ -131,7 +132,8 @@ static __u32 ok_features[3] = {
EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
- EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER
+ EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER |
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
};
static __u32 clear_ok_features[3] = {
@@ -147,7 +149,8 @@ static __u32 clear_ok_features[3] = {
EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
EXT4_FEATURE_RO_COMPAT_DIR_NLINK|
EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|
- EXT4_FEATURE_RO_COMPAT_GDT_CSUM
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM |
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
};
/*
@@ -330,6 +333,16 @@ static void update_mntopts(ext2_filsys fs, char *mntopts)
ext2fs_mark_super_dirty(fs);
}
+static int check_fsck_needed(ext2_filsys fs)
+{
+ if (fs->super->s_state & EXT2_VALID_FS)
+ return 0;
+ printf("\n%s\n", _(please_fsck));
+ if (mount_flags & EXT2_MF_READONLY)
+ printf(_("(and reboot afterwards!)\n"));
+ return 1;
+}
+
static void request_fsck_afterwards(ext2_filsys fs)
{
static int requested = 0;
@@ -343,6 +356,49 @@ static void request_fsck_afterwards(ext2_filsys fs)
}
/*
+ * Forcibly set checksums in all inodes.
+ */
+static void rewrite_inodes(ext2_filsys fs)
+{
+ struct ext2_inode_large inode;
+ ext2_inode_scan scan;
+ errcode_t retval;
+ ext2_ino_t ino;
+
+ if (fs->super->s_creator_os != EXT2_OS_LINUX)
+ return;
+
+ retval = ext2fs_open_inode_scan(fs, 0, &scan);
+ if (retval) {
+ com_err("set_csum", retval, "While opening inode scan");
+ exit(1);
+ }
+
+ do {
+ retval = ext2fs_get_next_inode(scan, &ino, &inode);
+ if (retval) {
+ com_err("set_csum", retval, "while getting next inode");
+ exit(1);
+ }
+ if (!ino)
+ break;
+ retval = ext2fs_write_inode(fs, ino, &inode);
+ if (retval) {
+ com_err("set_csum", retval, "while writing inode");
+ exit(1);
+ }
+ } while (ino);
+ ext2fs_close_inode_scan(scan);
+}
+
+static void rewrite_metadata_checksums(ext2_filsys fs)
+{
+ fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
+ rewrite_inodes(fs);
+ fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
+}
+
+/*
* Update the feature set as provided by the user.
*/
static void update_feature_set(ext2_filsys fs, char *features)
@@ -448,6 +504,20 @@ static void update_feature_set(ext2_filsys fs, char *features)
}
if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ if (check_fsck_needed(fs))
+ exit(1);
+ rewrite_checksums = 1;
+ }
+
+ if (FEATURE_OFF(E2P_FEATURE_RO_INCOMPAT,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ if (check_fsck_needed(fs))
+ exit(1);
+ rewrite_checksums = 1;
+ }
+
+ if (FEATURE_ON(E2P_FEATURE_RO_INCOMPAT,
EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
for (i = 0; i < fs->group_desc_count; i++) {
gd = ext2fs_group_desc(fs, fs->group_desc, i);
@@ -1824,7 +1894,10 @@ retry_open:
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
}
ext2fs_mark_super_dirty(fs);
+ rewrite_checksums = 1;
}
+ if (rewrite_checksums)
+ rewrite_metadata_checksums(fs);
if (I_flag) {
if (mount_flags & EXT2_MF_MOUNTED) {
fputs(_("The inode size may only be "
--
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