From: Theodore Ts'o <tytso@xxxxxxx> commit d65d87a07476aa17df2dcb3ad18c22c154315bec upstream. If CONFIG_QFMT_V2 is not enabled, but CONFIG_QUOTA is enabled, when a user tries to mount a file system with the quota or project quota enabled, the kernel will emit a very confusing messsage: EXT4-fs warning (device vdc): ext4_enable_quotas:5914: Failed to enable quota tracking (type=0, err=-3). Please run e2fsck to fix. EXT4-fs (vdc): mount failed We will now report an explanatory message indicating which kernel configuration options have to be enabled, to avoid customer/sysadmin confusion. Link: https://lore.kernel.org/r/20200215012738.565735-1-tytso@xxxxxxx Google-Bug-Id: 149093531 Fixes: 7c319d328505b778 ("ext4: make quota as first class supported feature") Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Cc: stable@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ext4/super.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2743,17 +2743,11 @@ static int ext4_feature_set_ok(struct su return 0; } -#ifndef CONFIG_QUOTA - if (ext4_has_feature_quota(sb) && !readonly) { +#if !defined(CONFIG_QUOTA) || !defined(CONFIG_QFMT_V2) + if (!readonly && (ext4_has_feature_quota(sb) || + ext4_has_feature_project(sb))) { ext4_msg(sb, KERN_ERR, - "Filesystem with quota feature cannot be mounted RDWR " - "without CONFIG_QUOTA"); - return 0; - } - if (ext4_has_feature_project(sb) && !readonly) { - ext4_msg(sb, KERN_ERR, - "Filesystem with project quota feature cannot be mounted RDWR " - "without CONFIG_QUOTA"); + "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); return 0; } #endif /* CONFIG_QUOTA */