Merge tag 'f2fs-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

Pull f2fs updates from Jaegeuk Kim:
 "In this round, we've mostly tuned f2fs to provide better user
  experience for Android. Especially, we've worked on atomic write
  feature again with SQLite community in order to support it officially.
  And we added or modified several facilities to analyze and enhance IO
  behaviors.

  Major changes include:
   - add app/fs io stat
   - add inode checksum feature
   - support project/journalled quota
   - enhance atomic write with new ioctl() which exposes feature set
   - enhance background gc/discard/fstrim flows with new gc_urgent mode
   - add F2FS_IOC_FS{GET,SET}XATTR
   - fix some quota flows"

* tag 'f2fs-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (63 commits)
  f2fs: hurry up to issue discard after io interruption
  f2fs: fix to show correct discard_granularity in sysfs
  f2fs: detect dirty inode in evict_inode
  f2fs: clear radix tree dirty tag of pages whose dirty flag is cleared
  f2fs: speed up gc_urgent mode with SSR
  f2fs: better to wait for fstrim completion
  f2fs: avoid race in between read xattr & write xattr
  f2fs: make get_lock_data_page to handle encrypted inode
  f2fs: use generic terms used for encrypted block management
  f2fs: introduce f2fs_encrypted_file for clean-up
  Revert "f2fs: add a new function get_ssr_cost"
  f2fs: constify super_operations
  f2fs: fix to wake up all sleeping flusher
  f2fs: avoid race in between atomic_read & atomic_inc
  f2fs: remove unneeded parameter of change_curseg
  f2fs: update i_flags correctly
  f2fs: don't check inode's checksum if it was dirtied or writebacked
  f2fs: don't need to update inode checksum for recovery
  f2fs: trigger fdatasync for non-atomic_write file
  f2fs: fix to avoid race in between aio and gc
  ...

1 files changed, 401 insertions, 32 deletions

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 32e4c025e97e..89f61eb3d167 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"
@@ -107,8 +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,
 };
 
@@ -144,8 +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},
 };
 
@@ -157,7 +182,7 @@ void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
 	va_start(args, fmt);
 	vaf.fmt = fmt;
 	vaf.va = &args;
-	printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
+	printk_ratelimited("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
 	va_end(args);
 }
 
@@ -168,6 +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);
@@ -175,6 +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;
@@ -386,15 +512,76 @@ 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;
 		case Opt_grpquota:
 			set_opt(sbi, GRPQUOTA);
 			break;
+		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;
@@ -406,6 +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,
@@ -439,6 +630,7 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb)
 	init_rwsem(&fi->dio_rwsem[READ]);
 	init_rwsem(&fi->dio_rwsem[WRITE]);
 	init_rwsem(&fi->i_mmap_sem);
+	init_rwsem(&fi->i_xattr_sem);
 
 #ifdef CONFIG_QUOTA
 	memset(&fi->i_dquot, 0, sizeof(fi->i_dquot));
@@ -446,6 +638,7 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb)
 #endif
 	/* Will be used by directory only */
 	fi->i_dir_level = F2FS_SB(sb)->dir_level;
+
 	return &fi->vfs_inode;
 }
 
@@ -584,7 +777,6 @@ 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);
@@ -642,7 +834,7 @@ static void f2fs_put_super(struct super_block *sb)
 
 	kfree(sbi->ckpt);
 
-	f2fs_exit_sysfs(sbi);
+	f2fs_unregister_sysfs(sbi);
 
 	sb->s_fs_info = NULL;
 	if (sbi->s_chksum_driver)
@@ -651,6 +843,10 @@ 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]);
@@ -664,6 +860,9 @@ 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;
 
@@ -698,6 +897,48 @@ static int f2fs_unfreeze(struct super_block *sb)
 	return 0;
 }
 
+#ifdef CONFIG_QUOTA
+static int f2fs_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 f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
 {
 	struct super_block *sb = dentry->d_sb;
@@ -733,9 +974,49 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_fsid.val[0] = (u32)id;
 	buf->f_fsid.val[1] = (u32)(id >> 32);
 
+#ifdef CONFIG_QUOTA
+	if (is_inode_flag_set(dentry->d_inode, FI_PROJ_INHERIT) &&
+			sb_has_quota_limits_enabled(sb, PRJQUOTA)) {
+		f2fs_statfs_project(sb, F2FS_I(dentry->d_inode)->i_projid, buf);
+	}
+#endif
 	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);
@@ -809,11 +1090,16 @@ 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))
 		seq_puts(seq, ",grpquota");
+	if (test_opt(sbi, PRJQUOTA))
+		seq_puts(seq, ",prjquota");
 #endif
+	f2fs_show_quota_options(seq, sbi->sb);
 
 	return 0;
 }
@@ -862,6 +1148,11 @@ 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
@@ -871,6 +1162,23 @@ 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);
@@ -952,6 +1260,11 @@ 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);
@@ -966,6 +1279,13 @@ 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;
@@ -1065,7 +1385,7 @@ static ssize_t f2fs_quota_write(struct super_block *sb, int type,
 	}
 
 	if (len == towrite)
-		return err;
+		return 0;
 	inode->i_version++;
 	inode->i_mtime = inode->i_ctime = current_time(inode);
 	f2fs_mark_inode_dirty_sync(inode, false);
@@ -1082,6 +1402,27 @@ 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);
@@ -1119,7 +1460,7 @@ static int f2fs_quota_on(struct super_block *sb, int type, int format_id,
 	struct inode *inode;
 	int err;
 
-	err = f2fs_quota_sync(sb, -1);
+	err = f2fs_quota_sync(sb, type);
 	if (err)
 		return err;
 
@@ -1147,7 +1488,7 @@ static int f2fs_quota_off(struct super_block *sb, int type)
 	if (!inode || !igrab(inode))
 		return dquot_quota_off(sb, type);
 
-	f2fs_quota_sync(sb, -1);
+	f2fs_quota_sync(sb, type);
 
 	err = dquot_quota_off(sb, type);
 	if (err)
@@ -1163,7 +1504,7 @@ 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;
 
@@ -1171,6 +1512,12 @@ static void f2fs_quota_off_umount(struct super_block *sb)
 		f2fs_quota_off(sb, type);
 }
 
+int f2fs_get_projid(struct inode *inode, kprojid_t *projid)
+{
+	*projid = F2FS_I(inode)->i_projid;
+	return 0;
+}
+
 static const struct dquot_operations f2fs_quota_operations = {
 	.get_reserved_space = f2fs_get_reserved_space,
 	.write_dquot	= dquot_commit,
@@ -1180,6 +1527,7 @@ static const struct dquot_operations f2fs_quota_operations = {
 	.write_info	= dquot_commit_info,
 	.alloc_dquot	= dquot_alloc,
 	.destroy_dquot	= dquot_destroy,
+	.get_projid	= f2fs_get_projid,
 	.get_next_id	= dquot_get_next_id,
 };
 
@@ -1194,12 +1542,12 @@ 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
 
-static struct super_operations f2fs_sops = {
+static const struct super_operations f2fs_sops = {
 	.alloc_inode	= f2fs_alloc_inode,
 	.drop_inode	= f2fs_drop_inode,
 	.destroy_inode	= f2fs_destroy_inode,
@@ -1303,9 +1651,16 @@ static const struct export_operations f2fs_export_ops = {
 
 static loff_t max_file_blocks(void)
 {
-	loff_t result = (DEF_ADDRS_PER_INODE - F2FS_INLINE_XATTR_ADDRS);
+	loff_t result = 0;
 	loff_t leaf_count = ADDRS_PER_BLOCK;
 
+	/*
+	 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
+	 * F2FS_INLINE_XATTR_ADDRS), but now f2fs try to reserve more
+	 * space in inode.i_addr, it will be more safe to reassign
+	 * result as zero.
+	 */
+
 	/* two direct node blocks */
 	result += (leaf_count * 2);
 
@@ -1922,6 +2277,11 @@ try_onemore:
 	sb->s_fs_info = sbi;
 	sbi->raw_super = raw_super;
 
+	/* precompute checksum seed for metadata */
+	if (f2fs_sb_has_inode_chksum(sb))
+		sbi->s_chksum_seed = f2fs_chksum(sbi, ~0, raw_super->uuid,
+						sizeof(raw_super->uuid));
+
 	/*
 	 * The BLKZONED feature indicates that the drive was formatted with
 	 * zone alignment optimization. This is optional for host-aware
@@ -1956,7 +2316,7 @@ try_onemore:
 #ifdef CONFIG_QUOTA
 	sb->dq_op = &f2fs_quota_operations;
 	sb->s_qcop = &f2fs_quotactl_ops;
-	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
+	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
 #endif
 
 	sb->s_op = &f2fs_sops;
@@ -1980,6 +2340,10 @@ try_onemore:
 	set_sbi_flag(sbi, SBI_POR_DOING);
 	spin_lock_init(&sbi->stat_lock);
 
+	/* init iostat info */
+	spin_lock_init(&sbi->iostat_lock);
+	sbi->iostat_enable = false;
+
 	for (i = 0; i < NR_PAGE_TYPE; i++) {
 		int n = (i == META) ? 1: NR_TEMP_TYPE;
 		int j;
@@ -2098,11 +2462,6 @@ 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)) {
@@ -2122,10 +2481,15 @@ try_onemore:
 		goto free_root_inode;
 	}
 
-	err = f2fs_init_sysfs(sbi);
+	err = f2fs_register_sysfs(sbi);
 	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)) {
 		/*
@@ -2135,7 +2499,7 @@ 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)
@@ -2149,7 +2513,7 @@ 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);
@@ -2173,7 +2537,7 @@ 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);
 
@@ -2191,9 +2555,17 @@ skip_recovery:
 	f2fs_update_time(sbi, REQ_TIME);
 	return 0;
 
-free_sysfs:
+free_meta:
 	f2fs_sync_inode_meta(sbi);
-	f2fs_exit_sysfs(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);
 	sb->s_root = NULL;
@@ -2202,13 +2574,6 @@ 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);
@@ -2228,6 +2593,10 @@ 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);
@@ -2311,7 +2680,7 @@ static int __init init_f2fs_fs(void)
 	err = create_extent_cache();
 	if (err)
 		goto free_checkpoint_caches;
-	err = f2fs_register_sysfs();
+	err = f2fs_init_sysfs();
 	if (err)
 		goto free_extent_cache;
 	err = register_shrinker(&f2fs_shrinker_info);
@@ -2330,7 +2699,7 @@ free_filesystem:
 free_shrinker:
 	unregister_shrinker(&f2fs_shrinker_info);
 free_sysfs:
-	f2fs_unregister_sysfs();
+	f2fs_exit_sysfs();
 free_extent_cache:
 	destroy_extent_cache();
 free_checkpoint_caches:
@@ -2350,7 +2719,7 @@ static void __exit exit_f2fs_fs(void)
 	f2fs_destroy_root_stats();
 	unregister_filesystem(&f2fs_fs_type);
 	unregister_shrinker(&f2fs_shrinker_info);
-	f2fs_unregister_sysfs();
+	f2fs_exit_sysfs();
 	destroy_extent_cache();
 	destroy_checkpoint_caches();
 	destroy_segment_manager_caches();