f2fs: support journalled quota

This patch supports to enable f2fs to accept quota information through
mount option:
- {usr,grp,prj}jquota=<quota file path>
- jqfmt=<quota type>

Then, in ->mount flow, we can recover quota file during log replaying,
by this, journelled quota can be supported.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
[Jaegeuk Kim: Fix wrong return values.]
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

4 files changed, 403 insertions, 30 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index da5b49183e09..04fe1df052b2 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -588,11 +588,24 @@ static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 int recover_orphan_inodes(struct f2fs_sb_info *sbi)
 {
 	block_t start_blk, orphan_blocks, i, j;
-	int err;
+	unsigned int s_flags = sbi->sb->s_flags;
+	int err = 0;
 
 	if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
 		return 0;
 
+	if (s_flags & MS_RDONLY) {
+		f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs");
+		sbi->sb->s_flags &= ~MS_RDONLY;
+	}
+
+#ifdef CONFIG_QUOTA
+	/* Needed for iput() to work correctly and not trash data */
+	sbi->sb->s_flags |= MS_ACTIVE;
+	/* Turn on quotas so that they are updated correctly */
+	f2fs_enable_quota_files(sbi);
+#endif
+
 	start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
 	orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
 
@@ -608,14 +621,21 @@ int recover_orphan_inodes(struct f2fs_sb_info *sbi)
 			err = recover_orphan_inode(sbi, ino);
 			if (err) {
 				f2fs_put_page(page, 1);
-				return err;
+				goto out;
 			}
 		}
 		f2fs_put_page(page, 1);
 	}
 	/* clear Orphan Flag */
 	clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
-	return 0;
+out:
+#ifdef CONFIG_QUOTA
+	/* Turn quotas off */
+	f2fs_quota_off_umount(sbi->sb);
+#endif
+	sbi->sb->s_flags = s_flags; /* Restore MS_RDONLY status */
+
+	return err;
 }
 
 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 0ccccbfdeeab..dddbe9269ceb 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -92,6 +92,7 @@ extern char *fault_name[FAULT_MAX];
 #define F2FS_MOUNT_USRQUOTA		0x00080000
 #define F2FS_MOUNT_GRPQUOTA		0x00100000
 #define F2FS_MOUNT_PRJQUOTA		0x00200000
+#define F2FS_MOUNT_QUOTA		0x00400000
 
 #define clear_opt(sbi, option)	((sbi)->mount_opt.opt &= ~F2FS_MOUNT_##option)
 #define set_opt(sbi, option)	((sbi)->mount_opt.opt |= F2FS_MOUNT_##option)
@@ -1117,6 +1118,12 @@ struct f2fs_sb_info {
 #ifdef CONFIG_F2FS_FAULT_INJECTION
 	struct f2fs_fault_info fault_info;
 #endif
+
+#ifdef CONFIG_QUOTA
+	/* Names of quota files with journalled quota */
+	char *s_qf_names[MAXQUOTAS];
+	int s_jquota_fmt;			/* Format of quota to use */
+#endif
 };
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
@@ -2429,6 +2436,8 @@ static inline int f2fs_add_link(struct dentry *dentry, struct inode *inode)
  */
 int f2fs_inode_dirtied(struct inode *inode, bool sync);
 void f2fs_inode_synced(struct inode *inode);
+void f2fs_enable_quota_files(struct f2fs_sb_info *sbi);
+void f2fs_quota_off_umount(struct super_block *sb);
 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
 int f2fs_sync_fs(struct super_block *sb, int sync);
 extern __printf(3, 4)
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 2d9b8182691f..a3d02613934a 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -69,20 +69,34 @@ static struct fsync_inode_entry *get_fsync_inode(struct list_head *head,
 }
 
 static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi,
-					struct list_head *head, nid_t ino)
+			struct list_head *head, nid_t ino, bool quota_inode)
 {
 	struct inode *inode;
 	struct fsync_inode_entry *entry;
+	int err;
 
 	inode = f2fs_iget_retry(sbi->sb, ino);
 	if (IS_ERR(inode))
 		return ERR_CAST(inode);
 
+	err = dquot_initialize(inode);
+	if (err)
+		goto err_out;
+
+	if (quota_inode) {
+		err = dquot_alloc_inode(inode);
+		if (err)
+			goto err_out;
+	}
+
 	entry = f2fs_kmem_cache_alloc(fsync_entry_slab, GFP_F2FS_ZERO);
 	entry->inode = inode;
 	list_add_tail(&entry->list, head);
 
 	return entry;
+err_out:
+	iput(inode);
+	return ERR_PTR(err);
 }
 
 static void del_fsync_inode(struct fsync_inode_entry *entry)
@@ -107,7 +121,8 @@ static int recover_dentry(struct inode *inode, struct page *ipage,
 
 	entry = get_fsync_inode(dir_list, pino);
 	if (!entry) {
-		entry = add_fsync_inode(F2FS_I_SB(inode), dir_list, pino);
+		entry = add_fsync_inode(F2FS_I_SB(inode), dir_list,
+							pino, false);
 		if (IS_ERR(entry)) {
 			dir = ERR_CAST(entry);
 			err = PTR_ERR(entry);
@@ -140,6 +155,13 @@ retry:
 				err = -EEXIST;
 			goto out_unmap_put;
 		}
+
+		err = dquot_initialize(einode);
+		if (err) {
+			iput(einode);
+			goto out_unmap_put;
+		}
+
 		err = acquire_orphan_inode(F2FS_I_SB(inode));
 		if (err) {
 			iput(einode);
@@ -226,18 +248,22 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
 
 		entry = get_fsync_inode(head, ino_of_node(page));
 		if (!entry) {
+			bool quota_inode = false;
+
 			if (!check_only &&
 					IS_INODE(page) && is_dent_dnode(page)) {
 				err = recover_inode_page(sbi, page);
 				if (err)
 					break;
+				quota_inode = true;
 			}
 
 			/*
 			 * CP | dnode(F) | inode(DF)
 			 * For this case, we should not give up now.
 			 */
-			entry = add_fsync_inode(sbi, head, ino_of_node(page));
+			entry = add_fsync_inode(sbi, head, ino_of_node(page),
+								quota_inode);
 			if (IS_ERR(entry)) {
 				err = PTR_ERR(entry);
 				if (err == -ENOENT) {
@@ -328,10 +354,18 @@ got_it:
 	f2fs_put_page(node_page, 1);
 
 	if (ino != dn->inode->i_ino) {
+		int ret;
+
 		/* Deallocate previous index in the node page */
 		inode = f2fs_iget_retry(sbi->sb, ino);
 		if (IS_ERR(inode))
 			return PTR_ERR(inode);
+
+		ret = dquot_initialize(inode);
+		if (ret) {
+			iput(inode);
+			return ret;
+		}
 	} else {
 		inode = dn->inode;
 	}
@@ -558,12 +592,27 @@ int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
 	struct list_head dir_list;
 	int err;
 	int ret = 0;
+	unsigned long s_flags = sbi->sb->s_flags;
 	bool need_writecp = false;
 
+	if (s_flags & MS_RDONLY) {
+		f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs");
+		sbi->sb->s_flags &= ~MS_RDONLY;
+	}
+
+#ifdef CONFIG_QUOTA
+	/* Needed for iput() to work correctly and not trash data */
+	sbi->sb->s_flags |= MS_ACTIVE;
+	/* Turn on quotas so that they are updated correctly */
+	f2fs_enable_quota_files(sbi);
+#endif
+
 	fsync_entry_slab = f2fs_kmem_cache_create("f2fs_fsync_inode_entry",
 			sizeof(struct fsync_inode_entry));
-	if (!fsync_entry_slab)
-		return -ENOMEM;
+	if (!fsync_entry_slab) {
+		err = -ENOMEM;
+		goto out;
+	}
 
 	INIT_LIST_HEAD(&inode_list);
 	INIT_LIST_HEAD(&dir_list);
@@ -574,11 +623,11 @@ int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
 	/* step #1: find fsynced inode numbers */
 	err = find_fsync_dnodes(sbi, &inode_list, check_only);
 	if (err || list_empty(&inode_list))
-		goto out;
+		goto skip;
 
 	if (check_only) {
 		ret = 1;
-		goto out;
+		goto skip;
 	}
 
 	need_writecp = true;
@@ -587,7 +636,7 @@ int recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
 	err = recover_data(sbi, &inode_list, &dir_list);
 	if (!err)
 		f2fs_bug_on(sbi, !list_empty(&inode_list));
-out:
+skip:
 	destroy_fsync_dnodes(&inode_list);
 
 	/* truncate meta pages to be used by the recovery */
@@ -615,5 +664,12 @@ out:
 	}
 
 	kmem_cache_destroy(fsync_entry_slab);
+out:
+#ifdef CONFIG_QUOTA
+	/* Turn quotas off */
+	f2fs_quota_off_umount(sbi->sb);
+#endif
+	sbi->sb->s_flags = s_flags; /* Restore MS_RDONLY status */
+
 	return ret ? ret: err;
 }
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 54b8ff4c6fc9..52083d662197 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -25,6 +25,7 @@
 #include <linux/quotaops.h>
 #include <linux/f2fs_fs.h>
 #include <linux/sysfs.h>
+#include <linux/quota.h>
 
 #include "f2fs.h"
 #include "node.h"
@@ -107,9 +108,20 @@ enum {
 	Opt_fault_injection,
 	Opt_lazytime,
 	Opt_nolazytime,
+	Opt_quota,
+	Opt_noquota,
 	Opt_usrquota,
 	Opt_grpquota,
 	Opt_prjquota,
+	Opt_usrjquota,
+	Opt_grpjquota,
+	Opt_prjjquota,
+	Opt_offusrjquota,
+	Opt_offgrpjquota,
+	Opt_offprjjquota,
+	Opt_jqfmt_vfsold,
+	Opt_jqfmt_vfsv0,
+	Opt_jqfmt_vfsv1,
 	Opt_err,
 };
 
@@ -145,9 +157,20 @@ static match_table_t f2fs_tokens = {
 	{Opt_fault_injection, "fault_injection=%u"},
 	{Opt_lazytime, "lazytime"},
 	{Opt_nolazytime, "nolazytime"},
+	{Opt_quota, "quota"},
+	{Opt_noquota, "noquota"},
 	{Opt_usrquota, "usrquota"},
 	{Opt_grpquota, "grpquota"},
 	{Opt_prjquota, "prjquota"},
+	{Opt_usrjquota, "usrjquota=%s"},
+	{Opt_grpjquota, "grpjquota=%s"},
+	{Opt_prjjquota, "prjjquota=%s"},
+	{Opt_offusrjquota, "usrjquota="},
+	{Opt_offgrpjquota, "grpjquota="},
+	{Opt_offprjjquota, "prjjquota="},
+	{Opt_jqfmt_vfsold, "jqfmt=vfsold"},
+	{Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
+	{Opt_jqfmt_vfsv1, "jqfmt=vfsv1"},
 	{Opt_err, NULL},
 };
 
@@ -170,6 +193,104 @@ static void init_once(void *foo)
 	inode_init_once(&fi->vfs_inode);
 }
 
+#ifdef CONFIG_QUOTA
+static const char * const quotatypes[] = INITQFNAMES;
+#define QTYPE2NAME(t) (quotatypes[t])
+static int f2fs_set_qf_name(struct super_block *sb, int qtype,
+							substring_t *args)
+{
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
+	char *qname;
+	int ret = -EINVAL;
+
+	if (sb_any_quota_loaded(sb) && !sbi->s_qf_names[qtype]) {
+		f2fs_msg(sb, KERN_ERR,
+			"Cannot change journaled "
+			"quota options when quota turned on");
+		return -EINVAL;
+	}
+	qname = match_strdup(args);
+	if (!qname) {
+		f2fs_msg(sb, KERN_ERR,
+			"Not enough memory for storing quotafile name");
+		return -EINVAL;
+	}
+	if (sbi->s_qf_names[qtype]) {
+		if (strcmp(sbi->s_qf_names[qtype], qname) == 0)
+			ret = 0;
+		else
+			f2fs_msg(sb, KERN_ERR,
+				 "%s quota file already specified",
+				 QTYPE2NAME(qtype));
+		goto errout;
+	}
+	if (strchr(qname, '/')) {
+		f2fs_msg(sb, KERN_ERR,
+			"quotafile must be on filesystem root");
+		goto errout;
+	}
+	sbi->s_qf_names[qtype] = qname;
+	set_opt(sbi, QUOTA);
+	return 0;
+errout:
+	kfree(qname);
+	return ret;
+}
+
+static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
+{
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
+
+	if (sb_any_quota_loaded(sb) && sbi->s_qf_names[qtype]) {
+		f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
+			" when quota turned on");
+		return -EINVAL;
+	}
+	kfree(sbi->s_qf_names[qtype]);
+	sbi->s_qf_names[qtype] = NULL;
+	return 0;
+}
+
+static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
+{
+	/*
+	 * 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(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi->sb)) {
+		f2fs_msg(sbi->sb, KERN_ERR, "Project quota feature not enabled. "
+			 "Cannot enable project quota enforcement.");
+		return -1;
+	}
+	if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA] ||
+			sbi->s_qf_names[PRJQUOTA]) {
+		if (test_opt(sbi, USRQUOTA) && sbi->s_qf_names[USRQUOTA])
+			clear_opt(sbi, USRQUOTA);
+
+		if (test_opt(sbi, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA])
+			clear_opt(sbi, GRPQUOTA);
+
+		if (test_opt(sbi, PRJQUOTA) && sbi->s_qf_names[PRJQUOTA])
+			clear_opt(sbi, PRJQUOTA);
+
+		if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
+				test_opt(sbi, PRJQUOTA)) {
+			f2fs_msg(sbi->sb, KERN_ERR, "old and new quota "
+					"format mixing");
+			return -1;
+		}
+
+		if (!sbi->s_jquota_fmt) {
+			f2fs_msg(sbi->sb, KERN_ERR, "journaled quota format "
+					"not specified");
+			return -1;
+		}
+	}
+	return 0;
+}
+#endif
+
 static int parse_options(struct super_block *sb, char *options)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
@@ -177,6 +298,9 @@ static int parse_options(struct super_block *sb, char *options)
 	substring_t args[MAX_OPT_ARGS];
 	char *p, *name;
 	int arg = 0;
+#ifdef CONFIG_QUOTA
+	int ret;
+#endif
 
 	if (!options)
 		return 0;
@@ -388,6 +512,7 @@ static int parse_options(struct super_block *sb, char *options)
 			sb->s_flags &= ~MS_LAZYTIME;
 			break;
 #ifdef CONFIG_QUOTA
+		case Opt_quota:
 		case Opt_usrquota:
 			set_opt(sbi, USRQUOTA);
 			break;
@@ -397,10 +522,66 @@ static int parse_options(struct super_block *sb, char *options)
 		case Opt_prjquota:
 			set_opt(sbi, PRJQUOTA);
 			break;
+		case Opt_usrjquota:
+			ret = f2fs_set_qf_name(sb, USRQUOTA, &args[0]);
+			if (ret)
+				return ret;
+			break;
+		case Opt_grpjquota:
+			ret = f2fs_set_qf_name(sb, GRPQUOTA, &args[0]);
+			if (ret)
+				return ret;
+			break;
+		case Opt_prjjquota:
+			ret = f2fs_set_qf_name(sb, PRJQUOTA, &args[0]);
+			if (ret)
+				return ret;
+			break;
+		case Opt_offusrjquota:
+			ret = f2fs_clear_qf_name(sb, USRQUOTA);
+			if (ret)
+				return ret;
+			break;
+		case Opt_offgrpjquota:
+			ret = f2fs_clear_qf_name(sb, GRPQUOTA);
+			if (ret)
+				return ret;
+			break;
+		case Opt_offprjjquota:
+			ret = f2fs_clear_qf_name(sb, PRJQUOTA);
+			if (ret)
+				return ret;
+			break;
+		case Opt_jqfmt_vfsold:
+			sbi->s_jquota_fmt = QFMT_VFS_OLD;
+			break;
+		case Opt_jqfmt_vfsv0:
+			sbi->s_jquota_fmt = QFMT_VFS_V0;
+			break;
+		case Opt_jqfmt_vfsv1:
+			sbi->s_jquota_fmt = QFMT_VFS_V1;
+			break;
+		case Opt_noquota:
+			clear_opt(sbi, QUOTA);
+			clear_opt(sbi, USRQUOTA);
+			clear_opt(sbi, GRPQUOTA);
+			clear_opt(sbi, PRJQUOTA);
+			break;
 #else
+		case Opt_quota:
 		case Opt_usrquota:
 		case Opt_grpquota:
 		case Opt_prjquota:
+		case Opt_usrjquota:
+		case Opt_grpjquota:
+		case Opt_prjjquota:
+		case Opt_offusrjquota:
+		case Opt_offgrpjquota:
+		case Opt_offprjjquota:
+		case Opt_jqfmt_vfsold:
+		case Opt_jqfmt_vfsv0:
+		case Opt_jqfmt_vfsv1:
+		case Opt_noquota:
 			f2fs_msg(sb, KERN_INFO,
 					"quota operations not supported");
 			break;
@@ -412,6 +593,10 @@ static int parse_options(struct super_block *sb, char *options)
 			return -EINVAL;
 		}
 	}
+#ifdef CONFIG_QUOTA
+	if (f2fs_check_quota_options(sbi))
+		return -EINVAL;
+#endif
 
 	if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
 		f2fs_msg(sb, KERN_ERR,
@@ -591,7 +776,6 @@ static void destroy_device_list(struct f2fs_sb_info *sbi)
 	kfree(sbi->devs);
 }
 
-static void f2fs_quota_off_umount(struct super_block *sb);
 static void f2fs_put_super(struct super_block *sb)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
@@ -658,6 +842,10 @@ static void f2fs_put_super(struct super_block *sb)
 
 	destroy_device_list(sbi);
 	mempool_destroy(sbi->write_io_dummy);
+#ifdef CONFIG_QUOTA
+	for (i = 0; i < MAXQUOTAS; i++)
+		kfree(sbi->s_qf_names[i]);
+#endif
 	destroy_percpu_info(sbi);
 	for (i = 0; i < NR_PAGE_TYPE; i++)
 		kfree(sbi->write_io[i]);
@@ -671,6 +859,9 @@ int f2fs_sync_fs(struct super_block *sb, int sync)
 
 	trace_f2fs_sync_fs(sb, sync);
 
+	if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
+		return -EAGAIN;
+
 	if (sync) {
 		struct cp_control cpc;
 
@@ -791,6 +982,40 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	return 0;
 }
 
+static inline void f2fs_show_quota_options(struct seq_file *seq,
+					   struct super_block *sb)
+{
+#ifdef CONFIG_QUOTA
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
+
+	if (sbi->s_jquota_fmt) {
+		char *fmtname = "";
+
+		switch (sbi->s_jquota_fmt) {
+		case QFMT_VFS_OLD:
+			fmtname = "vfsold";
+			break;
+		case QFMT_VFS_V0:
+			fmtname = "vfsv0";
+			break;
+		case QFMT_VFS_V1:
+			fmtname = "vfsv1";
+			break;
+		}
+		seq_printf(seq, ",jqfmt=%s", fmtname);
+	}
+
+	if (sbi->s_qf_names[USRQUOTA])
+		seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]);
+
+	if (sbi->s_qf_names[GRPQUOTA])
+		seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]);
+
+	if (sbi->s_qf_names[PRJQUOTA])
+		seq_show_option(seq, "prjjquota", sbi->s_qf_names[PRJQUOTA]);
+#endif
+}
+
 static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 {
 	struct f2fs_sb_info *sbi = F2FS_SB(root->d_sb);
@@ -864,6 +1089,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 				sbi->fault_info.inject_rate);
 #endif
 #ifdef CONFIG_QUOTA
+	if (test_opt(sbi, QUOTA))
+		seq_puts(seq, ",quota");
 	if (test_opt(sbi, USRQUOTA))
 		seq_puts(seq, ",usrquota");
 	if (test_opt(sbi, GRPQUOTA))
@@ -871,6 +1098,7 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 	if (test_opt(sbi, PRJQUOTA))
 		seq_puts(seq, ",prjquota");
 #endif
+	f2fs_show_quota_options(seq, sbi->sb);
 
 	return 0;
 }
@@ -919,6 +1147,11 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
 #ifdef CONFIG_F2FS_FAULT_INJECTION
 	struct f2fs_fault_info ffi = sbi->fault_info;
 #endif
+#ifdef CONFIG_QUOTA
+	int s_jquota_fmt;
+	char *s_qf_names[MAXQUOTAS];
+	int i, j;
+#endif
 
 	/*
 	 * Save the old mount options in case we
@@ -928,6 +1161,23 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
 	old_sb_flags = sb->s_flags;
 	active_logs = sbi->active_logs;
 
+#ifdef CONFIG_QUOTA
+	s_jquota_fmt = sbi->s_jquota_fmt;
+	for (i = 0; i < MAXQUOTAS; i++) {
+		if (sbi->s_qf_names[i]) {
+			s_qf_names[i] = kstrdup(sbi->s_qf_names[i],
+							 GFP_KERNEL);
+			if (!s_qf_names[i]) {
+				for (j = 0; j < i; j++)
+					kfree(s_qf_names[j]);
+				return -ENOMEM;
+			}
+		} else {
+			s_qf_names[i] = NULL;
+		}
+	}
+#endif
+
 	/* recover superblocks we couldn't write due to previous RO mount */
 	if (!(*flags & MS_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
 		err = f2fs_commit_super(sbi, false);
@@ -1009,6 +1259,11 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
 			goto restore_gc;
 	}
 skip:
+#ifdef CONFIG_QUOTA
+	/* Release old quota file names */
+	for (i = 0; i < MAXQUOTAS; i++)
+		kfree(s_qf_names[i]);
+#endif
 	/* Update the POSIXACL Flag */
 	sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
 		(test_opt(sbi, POSIX_ACL) ? MS_POSIXACL : 0);
@@ -1023,6 +1278,13 @@ restore_gc:
 		stop_gc_thread(sbi);
 	}
 restore_opts:
+#ifdef CONFIG_QUOTA
+	sbi->s_jquota_fmt = s_jquota_fmt;
+	for (i = 0; i < MAXQUOTAS; i++) {
+		kfree(sbi->s_qf_names[i]);
+		sbi->s_qf_names[i] = s_qf_names[i];
+	}
+#endif
 	sbi->mount_opt = org_mount_opt;
 	sbi->active_logs = active_logs;
 	sb->s_flags = old_sb_flags;
@@ -1139,6 +1401,27 @@ static qsize_t *f2fs_get_reserved_space(struct inode *inode)
 	return &F2FS_I(inode)->i_reserved_quota;
 }
 
+static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
+{
+	return dquot_quota_on_mount(sbi->sb, sbi->s_qf_names[type],
+						sbi->s_jquota_fmt, type);
+}
+
+void f2fs_enable_quota_files(struct f2fs_sb_info *sbi)
+{
+	int i, ret;
+
+	for (i = 0; i < MAXQUOTAS; i++) {
+		if (sbi->s_qf_names[i]) {
+			ret = f2fs_quota_on_mount(sbi, i);
+			if (ret < 0)
+				f2fs_msg(sbi->sb, KERN_ERR,
+					"Cannot turn on journaled "
+					"quota: error %d", ret);
+		}
+	}
+}
+
 static int f2fs_quota_sync(struct super_block *sb, int type)
 {
 	struct quota_info *dqopt = sb_dqopt(sb);
@@ -1220,7 +1503,7 @@ out_put:
 	return err;
 }
 
-static void f2fs_quota_off_umount(struct super_block *sb)
+void f2fs_quota_off_umount(struct super_block *sb)
 {
 	int type;
 
@@ -1258,7 +1541,7 @@ static const struct quotactl_ops f2fs_quotactl_ops = {
 	.get_nextdqblk	= dquot_get_next_dqblk,
 };
 #else
-static inline void f2fs_quota_off_umount(struct super_block *sb)
+void f2fs_quota_off_umount(struct super_block *sb)
 {
 }
 #endif
@@ -2178,11 +2461,6 @@ try_onemore:
 	if (err)
 		goto free_nm;
 
-	/* if there are nt orphan nodes free them */
-	err = recover_orphan_inodes(sbi);
-	if (err)
-		goto free_node_inode;
-
 	/* read root inode and dentry */
 	root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
 	if (IS_ERR(root)) {
@@ -2206,6 +2484,11 @@ try_onemore:
 	if (err)
 		goto free_root_inode;
 
+	/* if there are nt orphan nodes free them */
+	err = recover_orphan_inodes(sbi);
+	if (err)
+		goto free_sysfs;
+
 	/* recover fsynced data */
 	if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
 		/*
@@ -2215,7 +2498,7 @@ try_onemore:
 		if (bdev_read_only(sb->s_bdev) &&
 				!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
 			err = -EROFS;
-			goto free_sysfs;
+			goto free_meta;
 		}
 
 		if (need_fsck)
@@ -2229,7 +2512,7 @@ try_onemore:
 			need_fsck = true;
 			f2fs_msg(sb, KERN_ERR,
 				"Cannot recover all fsync data errno=%d", err);
-			goto free_sysfs;
+			goto free_meta;
 		}
 	} else {
 		err = recover_fsync_data(sbi, true);
@@ -2253,7 +2536,7 @@ skip_recovery:
 		/* After POR, we can run background GC thread.*/
 		err = start_gc_thread(sbi);
 		if (err)
-			goto free_sysfs;
+			goto free_meta;
 	}
 	kfree(options);
 
@@ -2271,8 +2554,16 @@ skip_recovery:
 	f2fs_update_time(sbi, REQ_TIME);
 	return 0;
 
-free_sysfs:
+free_meta:
 	f2fs_sync_inode_meta(sbi);
+	/*
+	 * Some dirty meta pages can be produced by recover_orphan_inodes()
+	 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
+	 * followed by write_checkpoint() through f2fs_write_node_pages(), which
+	 * falls into an infinite loop in sync_meta_pages().
+	 */
+	truncate_inode_pages_final(META_MAPPING(sbi));
+free_sysfs:
 	f2fs_unregister_sysfs(sbi);
 free_root_inode:
 	dput(sb->s_root);
@@ -2282,13 +2573,6 @@ free_node_inode:
 	mutex_lock(&sbi->umount_mutex);
 	release_ino_entry(sbi, true);
 	f2fs_leave_shrinker(sbi);
-	/*
-	 * Some dirty meta pages can be produced by recover_orphan_inodes()
-	 * failed by EIO. Then, iput(node_inode) can trigger balance_fs_bg()
-	 * followed by write_checkpoint() through f2fs_write_node_pages(), which
-	 * falls into an infinite loop in sync_meta_pages().
-	 */
-	truncate_inode_pages_final(META_MAPPING(sbi));
 	iput(sbi->node_inode);
 	mutex_unlock(&sbi->umount_mutex);
 	f2fs_destroy_stats(sbi);
@@ -2308,6 +2592,10 @@ free_options:
 	for (i = 0; i < NR_PAGE_TYPE; i++)
 		kfree(sbi->write_io[i]);
 	destroy_percpu_info(sbi);
+#ifdef CONFIG_QUOTA
+	for (i = 0; i < MAXQUOTAS; i++)
+		kfree(sbi->s_qf_names[i]);
+#endif
 	kfree(options);
 free_sb_buf:
 	kfree(raw_super);