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From ca35619b7209a50ee0fd1f2799cbe232277f39cc Mon Sep 17 00:00:00 2001
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From: Eryu Guan <guaneryu@gmail.com>
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Date: Thu, 4 Jul 2013 17:05:10 +0800
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Subject: [PATCH 3/8] mke2fs: disable resize_inode feature if 64bit feature is
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enabled
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Since auto_64-bit_support is on by default, resize_inode feature will
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be disabled when creating a >16T ext4 according to mke2fs.conf(5).
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This should also be done when making ext4 with "-O 64bit" to enable
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64bit feature explicitly. Otherwise online resize to enlarge a
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over-16T fs to larger would fail.
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[root@localhost resize]# truncate -s 50t fs.img
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[root@localhost resize]# losetup /dev/loop0 fs.img
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[root@localhost resize]# mkfs -t ext4 -O 64bit /dev/loop0 30t
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[root@localhost resize]# mount /dev/loop0 mnt
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[root@localhost resize]# resize2fs /dev/loop0
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resize2fs 1.42.7 (21-Jan-2013)
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Filesystem at /dev/loop0 is mounted on /root/resize/mnt; on-line resizing required
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old_desc_blocks = 3840, new_desc_blocks = 6400
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resize2fs: Invalid argument While checking for on-line resizing support
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And dmesg shows
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[688378.442623] EXT4-fs (loop0): resizing filesystem from 6710886400 to 13421772800 blocks
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[688378.443216] EXT4-fs warning (device loop0): verify_reserved_gdb:700: reserved GDT 3201 missing grp 177147 (5804756097)
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[688378.443222] EXT4-fs (loop0): resized filesystem to 8858370048
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[688378.528451] EXT4-fs warning (device loop0): ext4_group_extend:1710: can't shrink FS - resize aborted
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With this fix resize2fs could do the online enlarge correctly.
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Signed-off-by: Eryu Guan <guaneryu@gmail.com>
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---
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misc/mke2fs.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/misc/mke2fs.c b/misc/mke2fs.c
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index e970bbe..76ea60b 100644
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--- a/misc/mke2fs.c
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+++ b/misc/mke2fs.c
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@@ -1836,6 +1836,9 @@ profile_error:
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* 32-bit vs 64-bit block number support.
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*/
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if ((fs_blocks_count > MAX_32_NUM) &&
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+ (fs_param.s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT))
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+ fs_param.s_feature_compat &= ~EXT2_FEATURE_COMPAT_RESIZE_INODE;
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+ if ((fs_blocks_count > MAX_32_NUM) &&
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!(fs_param.s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT) &&
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get_bool_from_profile(fs_types, "auto_64-bit_support", 0)) {
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fs_param.s_feature_incompat |= EXT4_FEATURE_INCOMPAT_64BIT;
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--
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1.8.3.1
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