[v3,5/6] ext4: convert to multigrain timestamps

diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index 27fcbddfb148..1f9cf0bdbd3f 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -259,7 +259,7 @@  ext4_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
 	error = __ext4_set_acl(handle, inode, type, acl, 0 /* xattr_flags */);
 	if (!error && update_mode) {
 		inode->i_mode = mode;
-		inode->i_ctime = current_time(inode);
+		inode->i_ctime = current_ctime(inode);
 		error = ext4_mark_inode_dirty(handle, inode);
 	}
 out_stop:
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 3559ea6b0781..76ac6790869e 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4484,7 +4484,7 @@  static int ext4_alloc_file_blocks(struct file *file, ext4_lblk_t offset,
 		map.m_lblk += ret;
 		map.m_len = len = len - ret;
 		epos = (loff_t)map.m_lblk << inode->i_blkbits;
-		inode->i_ctime = current_time(inode);
+		inode->i_ctime = current_ctime(inode);
 		if (new_size) {
 			if (epos > new_size)
 				epos = new_size;
@@ -4618,7 +4618,7 @@  static long ext4_zero_range(struct file *file, loff_t offset,
 		}
 		/* Now release the pages and zero block aligned part of pages */
 		truncate_pagecache_range(inode, start, end - 1);
-		inode->i_mtime = inode->i_ctime = current_time(inode);
+		inode->i_mtime = inode->i_ctime = current_ctime(inode);
 
 		ret = ext4_alloc_file_blocks(file, lblk, max_blocks, new_size,
 					     flags);
@@ -4643,7 +4643,7 @@  static long ext4_zero_range(struct file *file, loff_t offset,
 		goto out_mutex;
 	}
 
-	inode->i_mtime = inode->i_ctime = current_time(inode);
+	inode->i_mtime = inode->i_ctime = current_ctime(inode);
 	if (new_size)
 		ext4_update_inode_size(inode, new_size);
 	ret = ext4_mark_inode_dirty(handle, inode);
@@ -5392,7 +5392,7 @@  static int ext4_collapse_range(struct file *file, loff_t offset, loff_t len)
 	up_write(&EXT4_I(inode)->i_data_sem);
 	if (IS_SYNC(inode))
 		ext4_handle_sync(handle);
-	inode->i_mtime = inode->i_ctime = current_time(inode);
+	inode->i_mtime = inode->i_ctime = current_ctime(inode);
 	ret = ext4_mark_inode_dirty(handle, inode);
 	ext4_update_inode_fsync_trans(handle, inode, 1);
 
@@ -5509,7 +5509,7 @@  static int ext4_insert_range(struct file *file, loff_t offset, loff_t len)
 	/* Expand file to avoid data loss if there is error while shifting */
 	inode->i_size += len;
 	EXT4_I(inode)->i_disksize += len;
-	inode->i_mtime = inode->i_ctime = current_time(inode);
+	inode->i_mtime = inode->i_ctime = current_ctime(inode);
 	ret = ext4_mark_inode_dirty(handle, inode);
 	if (ret)
 		goto out_stop;
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 157663031f8c..cf6973286acc 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1248,7 +1248,7 @@  struct inode *__ext4_new_inode(struct mnt_idmap *idmap,
 	inode->i_ino = ino + group * EXT4_INODES_PER_GROUP(sb);
 	/* This is the optimal IO size (for stat), not the fs block size */
 	inode->i_blocks = 0;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+	inode->i_mtime = inode->i_atime = inode->i_ctime = current_ctime(inode);
 	ei->i_crtime = inode->i_mtime;
 
 	memset(ei->i_data, 0, sizeof(ei->i_data));
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 1602d74b5eeb..6dbbd1a31fbe 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1054,7 +1054,7 @@  static int ext4_add_dirent_to_inline(handle_t *handle,
 	 * happen is that the times are slightly out of date
 	 * and/or different from the directory change time.
 	 */
-	dir->i_mtime = dir->i_ctime = current_time(dir);
+	dir->i_mtime = dir->i_ctime = current_ctime(dir);
 	ext4_update_dx_flag(dir);
 	inode_inc_iversion(dir);
 	return 1;
@@ -2015,7 +2015,7 @@  int ext4_inline_data_truncate(struct inode *inode, int *has_inline)
 		ext4_orphan_del(handle, inode);
 
 	if (err == 0) {
-		inode->i_mtime = inode->i_ctime = current_time(inode);
+		inode->i_mtime = inode->i_ctime = current_ctime(inode);
 		err = ext4_mark_inode_dirty(handle, inode);
 		if (IS_SYNC(inode))
 			ext4_handle_sync(handle);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index bf0b7dea4900..135fa0bf445c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4201,7 +4201,7 @@  int ext4_punch_hole(struct file *file, loff_t offset, loff_t length)
 	if (IS_SYNC(inode))
 		ext4_handle_sync(handle);
 
-	inode->i_mtime = inode->i_ctime = current_time(inode);
+	inode->i_mtime = inode->i_ctime = current_ctime(inode);
 	ret2 = ext4_mark_inode_dirty(handle, inode);
 	if (unlikely(ret2))
 		ret = ret2;
@@ -4361,7 +4361,7 @@  int ext4_truncate(struct inode *inode)
 	if (inode->i_nlink)
 		ext4_orphan_del(handle, inode);
 
-	inode->i_mtime = inode->i_ctime = current_time(inode);
+	inode->i_mtime = inode->i_ctime = current_ctime(inode);
 	err2 = ext4_mark_inode_dirty(handle, inode);
 	if (unlikely(err2 && !err))
 		err = err2;
@@ -4424,6 +4424,19 @@  static int ext4_inode_blocks_set(struct ext4_inode *raw_inode,
 	return 0;
 }
 
+static void ext4_inode_set_ctime(struct inode *inode, struct ext4_inode *raw_inode)
+{
+	struct timespec64 ctime = ctime_peek(inode);
+
+	if (EXT4_FITS_IN_INODE(raw_inode, EXT4_I(inode), i_ctime_extra)) {
+		raw_inode->i_ctime = cpu_to_le32(ctime.tv_sec);
+		raw_inode->i_ctime_extra = ext4_encode_extra_time(&ctime);
+	} else {
+		raw_inode->i_ctime = cpu_to_le32(clamp_t(int32_t,
+					ctime.tv_sec, S32_MIN, S32_MAX));
+	}
+}
+
 static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode)
 {
 	struct ext4_inode_info *ei = EXT4_I(inode);
@@ -4464,7 +4477,7 @@  static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode
 	}
 	raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
 
-	EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
+	ext4_inode_set_ctime(inode, raw_inode);
 	EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
 	EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
 	EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
@@ -5172,7 +5185,7 @@  static void __ext4_update_other_inode_time(struct super_block *sb,
 		spin_unlock(&inode->i_lock);
 
 		spin_lock(&ei->i_raw_lock);
-		EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
+		ext4_inode_set_ctime(inode, raw_inode);
 		EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
 		EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
 		ext4_inode_csum_set(inode, raw_inode, ei);
@@ -5568,7 +5581,7 @@  int ext4_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 			 * update c/mtime in shrink case below
 			 */
 			if (!shrink) {
-				inode->i_mtime = current_time(inode);
+				inode->i_mtime = current_ctime(inode);
 				inode->i_ctime = inode->i_mtime;
 			}
 
@@ -5729,6 +5742,7 @@  int ext4_getattr(struct mnt_idmap *idmap, const struct path *path,
 				  STATX_ATTR_VERITY);
 
 	generic_fillattr(idmap, inode, stat);
+	generic_fill_multigrain_cmtime(request_mask, inode, stat);
 	return 0;
 }
 
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index f9a430152063..4244ea049065 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -449,7 +449,7 @@  static long swap_inode_boot_loader(struct super_block *sb,
 	diff = size - size_bl;
 	swap_inode_data(inode, inode_bl);
 
-	inode->i_ctime = inode_bl->i_ctime = current_time(inode);
+	inode->i_ctime = inode_bl->i_ctime = current_ctime(inode);
 	inode_inc_iversion(inode);
 
 	inode->i_generation = get_random_u32();
@@ -663,7 +663,7 @@  static int ext4_ioctl_setflags(struct inode *inode,
 
 	ext4_set_inode_flags(inode, false);
 
-	inode->i_ctime = current_time(inode);
+	inode->i_ctime = current_ctime(inode);
 	inode_inc_iversion(inode);
 
 	err = ext4_mark_iloc_dirty(handle, inode, &iloc);
@@ -774,7 +774,7 @@  static int ext4_ioctl_setproject(struct inode *inode, __u32 projid)
 	}
 
 	EXT4_I(inode)->i_projid = kprojid;
-	inode->i_ctime = current_time(inode);
+	inode->i_ctime = current_ctime(inode);
 	inode_inc_iversion(inode);
 out_dirty:
 	rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
@@ -1257,7 +1257,7 @@  static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		}
 		err = ext4_reserve_inode_write(handle, inode, &iloc);
 		if (err == 0) {
-			inode->i_ctime = current_time(inode);
+			inode->i_ctime = current_ctime(inode);
 			inode_inc_iversion(inode);
 			inode->i_generation = generation;
 			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index a5010b5b8a8c..1615ae8f8026 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2187,7 +2187,7 @@  static int add_dirent_to_buf(handle_t *handle, struct ext4_filename *fname,
 	 * happen is that the times are slightly out of date
 	 * and/or different from the directory change time.
 	 */
-	dir->i_mtime = dir->i_ctime = current_time(dir);
+	dir->i_mtime = dir->i_ctime = current_ctime(dir);
 	ext4_update_dx_flag(dir);
 	inode_inc_iversion(dir);
 	err2 = ext4_mark_inode_dirty(handle, dir);
@@ -3176,7 +3176,7 @@  static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
 	 * recovery. */
 	inode->i_size = 0;
 	ext4_orphan_add(handle, inode);
-	inode->i_ctime = dir->i_ctime = dir->i_mtime = current_time(inode);
+	inode->i_ctime = dir->i_ctime = dir->i_mtime = current_ctime(inode);
 	retval = ext4_mark_inode_dirty(handle, inode);
 	if (retval)
 		goto end_rmdir;
@@ -3250,7 +3250,7 @@  int __ext4_unlink(struct inode *dir, const struct qstr *d_name,
 		retval = ext4_delete_entry(handle, dir, de, bh);
 		if (retval)
 			goto out_handle;
-		dir->i_ctime = dir->i_mtime = current_time(dir);
+		dir->i_ctime = dir->i_mtime = current_ctime(dir);
 		ext4_update_dx_flag(dir);
 		retval = ext4_mark_inode_dirty(handle, dir);
 		if (retval)
@@ -3265,7 +3265,7 @@  int __ext4_unlink(struct inode *dir, const struct qstr *d_name,
 		drop_nlink(inode);
 	if (!inode->i_nlink)
 		ext4_orphan_add(handle, inode);
-	inode->i_ctime = current_time(inode);
+	inode->i_ctime = current_ctime(inode);
 	retval = ext4_mark_inode_dirty(handle, inode);
 	if (dentry && !retval)
 		ext4_fc_track_unlink(handle, dentry);
@@ -3442,7 +3442,7 @@  int __ext4_link(struct inode *dir, struct inode *inode, struct dentry *dentry)
 	if (IS_DIRSYNC(dir))
 		ext4_handle_sync(handle);
 
-	inode->i_ctime = current_time(inode);
+	inode->i_ctime = current_ctime(inode);
 	ext4_inc_count(inode);
 	ihold(inode);
 
@@ -3621,7 +3621,7 @@  static int ext4_setent(handle_t *handle, struct ext4_renament *ent,
 		ent->de->file_type = file_type;
 	inode_inc_iversion(ent->dir);
 	ent->dir->i_ctime = ent->dir->i_mtime =
-		current_time(ent->dir);
+		current_ctime(ent->dir);
 	retval = ext4_mark_inode_dirty(handle, ent->dir);
 	BUFFER_TRACE(ent->bh, "call ext4_handle_dirty_metadata");
 	if (!ent->inlined) {
@@ -3929,7 +3929,7 @@  static int ext4_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 	 * Like most other Unix systems, set the ctime for inodes on a
 	 * rename.
 	 */
-	old.inode->i_ctime = current_time(old.inode);
+	old.inode->i_ctime = current_ctime(old.inode);
 	retval = ext4_mark_inode_dirty(handle, old.inode);
 	if (unlikely(retval))
 		goto end_rename;
@@ -3943,9 +3943,9 @@  static int ext4_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 
 	if (new.inode) {
 		ext4_dec_count(new.inode);
-		new.inode->i_ctime = current_time(new.inode);
+		new.inode->i_ctime = current_ctime(new.inode);
 	}
-	old.dir->i_ctime = old.dir->i_mtime = current_time(old.dir);
+	old.dir->i_ctime = old.dir->i_mtime = current_ctime(old.dir);
 	ext4_update_dx_flag(old.dir);
 	if (old.dir_bh) {
 		retval = ext4_rename_dir_finish(handle, &old, new.dir->i_ino);
@@ -4139,7 +4139,7 @@  static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 	 * Like most other Unix systems, set the ctime for inodes on a
 	 * rename.
 	 */
-	ctime = current_time(old.inode);
+	ctime = current_ctime(old.inode);
 	old.inode->i_ctime = ctime;
 	new.inode->i_ctime = ctime;
 	retval = ext4_mark_inode_dirty(handle, old.inode);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index f43e526112ae..cca7726eceff 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -7051,7 +7051,7 @@  static int ext4_quota_off(struct super_block *sb, int type)
 	}
 	EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL);
 	inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
-	inode->i_mtime = inode->i_ctime = current_time(inode);
+	inode->i_mtime = inode->i_ctime = current_ctime(inode);
 	err = ext4_mark_inode_dirty(handle, inode);
 	ext4_journal_stop(handle);
 out_unlock:
@@ -7227,7 +7227,7 @@  static struct file_system_type ext4_fs_type = {
 	.init_fs_context	= ext4_init_fs_context,
 	.parameters		= ext4_param_specs,
 	.kill_sb		= kill_block_super,
-	.fs_flags		= FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
+	.fs_flags		= FS_REQUIRES_DEV | FS_ALLOW_IDMAP | FS_MULTIGRAIN_TS,
 };
 MODULE_ALIAS_FS("ext4");
 
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 767454d74cd6..160f203d211e 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -2475,7 +2475,7 @@  ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
 	}
 	if (!error) {
 		ext4_xattr_update_super_block(handle, inode->i_sb);
-		inode->i_ctime = current_time(inode);
+		inode->i_ctime = current_ctime(inode);
 		inode_inc_iversion(inode);
 		if (!value)
 			no_expand = 0;