ext4: add project quota support
This patch adds mount options for enabling/disabling project quota
accounting and enforcement. A new specific inode is also used for
project quota accounting.
[ Includes fix from Dan Carpenter to crrect error checking from dqget(). ]
Signed-off-by: Li Xi <lixi@ddn.com>
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Jan Kara <jack@suse.cz>
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 844c95d..3aea58a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1097,8 +1097,8 @@
}
#ifdef CONFIG_QUOTA
-#define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group")
-#define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
+static char *quotatypes[] = INITQFNAMES;
+#define QTYPE2NAME(t) (quotatypes[t])
static int ext4_write_dquot(struct dquot *dquot);
static int ext4_acquire_dquot(struct dquot *dquot);
@@ -2558,6 +2558,12 @@
"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");
+ return 0;
+ }
#endif /* CONFIG_QUOTA */
return 1;
}
@@ -3686,7 +3692,7 @@
sb->s_qcop = &dquot_quotactl_sysfile_ops;
else
sb->s_qcop = &ext4_qctl_operations;
- sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
+ sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
#endif
memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid));
@@ -4822,6 +4828,48 @@
return err;
}
+#ifdef CONFIG_QUOTA
+static int ext4_statfs_project(struct super_block *sb,
+ kprojid_t projid, struct kstatfs *buf)
+{
+ struct kqid qid;
+ struct dquot *dquot;
+ u64 limit;
+ u64 curblock;
+
+ qid = make_kqid_projid(projid);
+ dquot = dqget(sb, qid);
+ if (IS_ERR(dquot))
+ return PTR_ERR(dquot);
+ spin_lock(&dq_data_lock);
+
+ limit = (dquot->dq_dqb.dqb_bsoftlimit ?
+ dquot->dq_dqb.dqb_bsoftlimit :
+ dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits;
+ if (limit && buf->f_blocks > limit) {
+ curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits;
+ buf->f_blocks = limit;
+ buf->f_bfree = buf->f_bavail =
+ (buf->f_blocks > curblock) ?
+ (buf->f_blocks - curblock) : 0;
+ }
+
+ limit = dquot->dq_dqb.dqb_isoftlimit ?
+ dquot->dq_dqb.dqb_isoftlimit :
+ dquot->dq_dqb.dqb_ihardlimit;
+ if (limit && buf->f_files > limit) {
+ buf->f_files = limit;
+ buf->f_ffree =
+ (buf->f_files > dquot->dq_dqb.dqb_curinodes) ?
+ (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0;
+ }
+
+ spin_unlock(&dq_data_lock);
+ dqput(dquot);
+ return 0;
+}
+#endif
+
static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
@@ -4854,6 +4902,11 @@
buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
+#ifdef CONFIG_QUOTA
+ if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) &&
+ sb_has_quota_limits_enabled(sb, PRJQUOTA))
+ ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf);
+#endif
return 0;
}
@@ -5018,7 +5071,8 @@
struct inode *qf_inode;
unsigned long qf_inums[EXT4_MAXQUOTAS] = {
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
- le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
+ le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),
+ le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)
};
BUG_ON(!ext4_has_feature_quota(sb));
@@ -5046,7 +5100,8 @@
int type, err = 0;
unsigned long qf_inums[EXT4_MAXQUOTAS] = {
le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum),
- le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum)
+ le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum),
+ le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum)
};
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE;