add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/fat/namei_msdos.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  *  linux/fs/msdos/namei.c
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  *
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@@ -250,7 +251,7 @@
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 	if (err)
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 		return err;
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-	dir->i_ctime = dir->i_mtime = *ts;
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+	fat_truncate_time(dir, ts, S_CTIME|S_MTIME);
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 	if (IS_DIRSYNC(dir))
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 		(void)fat_sync_inode(dir);
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 	else
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@@ -294,7 +295,7 @@
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 		err = PTR_ERR(inode);
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 		goto out;
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 	}
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-	inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
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+	fat_truncate_time(inode, &ts, S_ATIME|S_CTIME|S_MTIME);
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 	/* timestamp is already written, so mark_inode_dirty() is unneeded. */
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 	d_instantiate(dentry, inode);
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@@ -327,7 +328,7 @@
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 	drop_nlink(dir);
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 	clear_nlink(inode);
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-	inode->i_ctime = current_time(inode);
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+	fat_truncate_time(inode, NULL, S_CTIME);
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 	fat_detach(inode);
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 out:
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 	mutex_unlock(&MSDOS_SB(sb)->s_lock);
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@@ -380,7 +381,7 @@
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 		goto out;
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 	}
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 	set_nlink(inode, 2);
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-	inode->i_mtime = inode->i_atime = inode->i_ctime = ts;
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+	fat_truncate_time(inode, &ts, S_ATIME|S_CTIME|S_MTIME);
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 	/* timestamp is already written, so mark_inode_dirty() is unneeded. */
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 	d_instantiate(dentry, inode);
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@@ -413,7 +414,7 @@
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 	if (err)
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 		goto out;
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 	clear_nlink(inode);
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-	inode->i_ctime = current_time(inode);
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+	fat_truncate_time(inode, NULL, S_CTIME);
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 	fat_detach(inode);
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 out:
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 	mutex_unlock(&MSDOS_SB(sb)->s_lock);
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@@ -478,7 +479,7 @@
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 				mark_inode_dirty(old_inode);
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 			inode_inc_iversion(old_dir);
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-			old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
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+			fat_truncate_time(old_dir, NULL, S_CTIME|S_MTIME);
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 			if (IS_DIRSYNC(old_dir))
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 				(void)fat_sync_inode(old_dir);
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 			else
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@@ -538,7 +539,7 @@
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 	if (err)
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 		goto error_dotdot;
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 	inode_inc_iversion(old_dir);
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-	old_dir->i_ctime = old_dir->i_mtime = ts;
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+	fat_truncate_time(old_dir, &ts, S_CTIME|S_MTIME);
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 	if (IS_DIRSYNC(old_dir))
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 		(void)fat_sync_inode(old_dir);
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 	else
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@@ -548,7 +549,7 @@
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 		drop_nlink(new_inode);
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 		if (is_dir)
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 			drop_nlink(new_inode);
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-		new_inode->i_ctime = ts;
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+		fat_truncate_time(new_inode, &ts, S_CTIME);
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 	}
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 out:
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 	brelse(sinfo.bh);
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@@ -637,6 +638,7 @@
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 	.rename		= msdos_rename,
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 	.setattr	= fat_setattr,
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 	.getattr	= fat_getattr,
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+	.update_time	= fat_update_time,
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 };
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 static void setup(struct super_block *sb)
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@@ -678,6 +680,7 @@
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 }
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 MODULE_LICENSE("GPL");
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+MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
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 MODULE_AUTHOR("Werner Almesberger");
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 MODULE_DESCRIPTION("MS-DOS filesystem support");
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