ext4: enable quota enforcement based on mount options
When quota information is stored in quota files, we enable only quota
accounting on mount and enforcement is enabled only in response to
Q_QUOTAON quotactl. To make ext4 behavior consistent with XFS, we add a
possibility to enable quota enforcement on mount by specifying
corresponding quota mount option (usrquota, grpquota, prjquota).
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 3ec8708..5819b0e 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1267,7 +1267,7 @@
Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota,
Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err,
- Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax,
+ Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax,
Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit,
Opt_lazytime, Opt_nolazytime,
Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity,
@@ -1327,6 +1327,7 @@
{Opt_noquota, "noquota"},
{Opt_quota, "quota"},
{Opt_usrquota, "usrquota"},
+ {Opt_prjquota, "prjquota"},
{Opt_barrier, "barrier=%u"},
{Opt_barrier, "barrier"},
{Opt_nobarrier, "nobarrier"},
@@ -1546,8 +1547,11 @@
MOPT_SET | MOPT_Q},
{Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA,
MOPT_SET | MOPT_Q},
+ {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA,
+ MOPT_SET | MOPT_Q},
{Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA |
- EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q},
+ EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA),
+ MOPT_CLEAR | MOPT_Q},
{Opt_usrjquota, 0, MOPT_Q},
{Opt_grpjquota, 0, MOPT_Q},
{Opt_offusrjquota, 0, MOPT_Q},
@@ -1836,13 +1840,17 @@
return 0;
}
#ifdef CONFIG_QUOTA
- if (ext4_has_feature_quota(sb) &&
- (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) {
- ext4_msg(sb, KERN_INFO, "Quota feature enabled, usrquota and grpquota "
- "mount options ignored.");
- clear_opt(sb, USRQUOTA);
- clear_opt(sb, GRPQUOTA);
- } else if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
+ /*
+ * We do the test below only for project quotas. 'usrquota' and
+ * 'grpquota' mount options are allowed even without quota feature
+ * to support legacy quotas in quota files.
+ */
+ if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) {
+ ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. "
+ "Cannot enable project quota enforcement.");
+ return 0;
+ }
+ if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) {
if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
clear_opt(sb, USRQUOTA);
@@ -5250,12 +5258,18 @@
le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),
le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)
};
+ bool quota_mopt[EXT4_MAXQUOTAS] = {
+ test_opt(sb, USRQUOTA),
+ test_opt(sb, GRPQUOTA),
+ test_opt(sb, PRJQUOTA),
+ };
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;
for (type = 0; type < EXT4_MAXQUOTAS; type++) {
if (qf_inums[type]) {
err = ext4_quota_enable(sb, type, QFMT_VFS_V1,
- DQUOT_USAGE_ENABLED);
+ DQUOT_USAGE_ENABLED |
+ (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
if (err) {
ext4_warning(sb,
"Failed to enable quota tracking "