f2fs: support fault injection for dquot_initialize()

This patch adds a new function f2fs_dquot_initialize() to wrap
dquot_initialize(), and it supports to inject fault into
f2fs_dquot_initialize() to simulate inner failure occurs in
dquot_initialize().

Usage:
a) echo 65536 > /sys/fs/f2fs/<dev>/inject_type or
b) mount -o fault_type=65536 <dev> <mountpoint>

Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

Documentation/filesystems/f2fs.rst

@@ -197,6 +197,7 @@ fault_type=%d		 Support configuring fault injection type, should be
 			 FAULT_DISCARD		  0x000002000
 			 FAULT_WRITE_IO		  0x000004000
 			 FAULT_SLAB_ALLOC	  0x000008000
+			 FAULT_DQUOT_INIT	  0x000010000
 			 ===================	  ===========
 mode=%s			 Control block allocation mode which supports "adaptive"
 			 and "lfs". In "lfs" mode, there should be no random

fs/f2fs/checkpoint.c

@@ -653,7 +653,7 @@ static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 		return PTR_ERR(inode);
 	}
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err) {
 		iput(inode);
 		goto err_out;

fs/f2fs/f2fs.h

@@ -55,6 +55,7 @@ enum {
 	FAULT_DISCARD,
 	FAULT_WRITE_IO,
 	FAULT_SLAB_ALLOC,
+	FAULT_DQUOT_INIT,
 	FAULT_MAX,
 };
 
@@ -3376,6 +3377,7 @@ 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);
+int f2fs_dquot_initialize(struct inode *inode);
 int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly);
 int f2fs_quota_sync(struct super_block *sb, int type);
 loff_t max_file_blocks(struct inode *inode);

fs/f2fs/file.c

@@ -786,7 +786,7 @@ int f2fs_truncate(struct inode *inode)
 		return -EIO;
 	}
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		return err;
 
@@ -916,7 +916,7 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
 		return err;
 
 	if (is_quota_modification(inode, attr)) {
-		err = dquot_initialize(inode);
+		err = f2fs_dquot_initialize(inode);
 		if (err)
 			return err;
 	}
@@ -3020,7 +3020,7 @@ static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
 	}
 	f2fs_put_page(ipage, 1);
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		return err;
 

fs/f2fs/inline.c

@@ -192,7 +192,7 @@ int f2fs_convert_inline_inode(struct inode *inode)
 			f2fs_hw_is_readonly(sbi) || f2fs_readonly(sbi->sb))
 		return 0;
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		return err;
 

fs/f2fs/inode.c

@@ -754,7 +754,7 @@ void f2fs_evict_inode(struct inode *inode)
 	if (inode->i_nlink || is_bad_inode(inode))
 		goto no_delete;
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err) {
 		err = 0;
 		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);

fs/f2fs/namei.c

@@ -74,7 +74,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
 	if (err)
 		goto fail_drop;
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		goto fail_drop;
 
@@ -345,7 +345,7 @@ static int f2fs_create(struct user_namespace *mnt_userns, struct inode *dir,
 	if (!f2fs_is_checkpoint_ready(sbi))
 		return -ENOSPC;
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		return err;
 
@@ -404,7 +404,7 @@ static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
 			F2FS_I(old_dentry->d_inode)->i_projid)))
 		return -EXDEV;
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		return err;
 
@@ -460,7 +460,7 @@ static int __recover_dot_dentries(struct inode *dir, nid_t pino)
 		return 0;
 	}
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		return err;
 
@@ -598,10 +598,10 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
 		goto fail;
 	}
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		goto fail;
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		goto fail;
 
@@ -675,7 +675,7 @@ static int f2fs_symlink(struct user_namespace *mnt_userns, struct inode *dir,
 	if (err)
 		return err;
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		return err;
 
@@ -746,7 +746,7 @@ static int f2fs_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
 	if (unlikely(f2fs_cp_error(sbi)))
 		return -EIO;
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		return err;
 
@@ -803,7 +803,7 @@ static int f2fs_mknod(struct user_namespace *mnt_userns, struct inode *dir,
 	if (!f2fs_is_checkpoint_ready(sbi))
 		return -ENOSPC;
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		return err;
 
@@ -841,7 +841,7 @@ static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry,
 	struct inode *inode;
 	int err;
 
-	err = dquot_initialize(dir);
+	err = f2fs_dquot_initialize(dir);
 	if (err)
 		return err;
 
@@ -965,16 +965,16 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
 			return err;
 	}
 
-	err = dquot_initialize(old_dir);
+	err = f2fs_dquot_initialize(old_dir);
 	if (err)
 		goto out;
 
-	err = dquot_initialize(new_dir);
+	err = f2fs_dquot_initialize(new_dir);
 	if (err)
 		goto out;
 
 	if (new_inode) {
-		err = dquot_initialize(new_inode);
+		err = f2fs_dquot_initialize(new_inode);
 		if (err)
 			goto out;
 	}
@@ -1138,11 +1138,11 @@ static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
 			F2FS_I(new_dentry->d_inode)->i_projid)))
 		return -EXDEV;
 
-	err = dquot_initialize(old_dir);
+	err = f2fs_dquot_initialize(old_dir);
 	if (err)
 		goto out;
 
-	err = dquot_initialize(new_dir);
+	err = f2fs_dquot_initialize(new_dir);
 	if (err)
 		goto out;
 

fs/f2fs/recovery.c

@@ -81,7 +81,7 @@ static struct fsync_inode_entry *add_fsync_inode(struct f2fs_sb_info *sbi,
 	if (IS_ERR(inode))
 		return ERR_CAST(inode);
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		goto err_out;
 
@@ -203,7 +203,7 @@ retry:
 			goto out_put;
 		}
 
-		err = dquot_initialize(einode);
+		err = f2fs_dquot_initialize(einode);
 		if (err) {
 			iput(einode);
 			goto out_put;
@@ -508,7 +508,7 @@ got_it:
 		if (IS_ERR(inode))
 			return PTR_ERR(inode);
 
-		ret = dquot_initialize(inode);
+		ret = f2fs_dquot_initialize(inode);
 		if (ret) {
 			iput(inode);
 			return ret;

fs/f2fs/super.c

@@ -58,6 +58,7 @@ const char *f2fs_fault_name[FAULT_MAX] = {
 	[FAULT_DISCARD]		= "discard error",
 	[FAULT_WRITE_IO]	= "write IO error",
 	[FAULT_SLAB_ALLOC]	= "slab alloc",
+	[FAULT_DQUOT_INIT]	= "dquot initialize",
 };
 
 void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
@@ -2499,6 +2500,16 @@ retry:
 	return len - towrite;
 }
 
+int f2fs_dquot_initialize(struct inode *inode)
+{
+	if (time_to_inject(F2FS_I_SB(inode), FAULT_DQUOT_INIT)) {
+		f2fs_show_injection_info(F2FS_I_SB(inode), FAULT_DQUOT_INIT);
+		return -ESRCH;
+	}
+
+	return dquot_initialize(inode);
+}
+
 static struct dquot **f2fs_get_dquots(struct inode *inode)
 {
 	return F2FS_I(inode)->i_dquot;
@@ -2883,6 +2894,11 @@ static const struct quotactl_ops f2fs_quotactl_ops = {
 	.get_nextdqblk	= dquot_get_next_dqblk,
 };
 #else
+int f2fs_dquot_initialize(struct inode *inode)
+{
+	return 0;
+}
+
 int f2fs_quota_sync(struct super_block *sb, int type)
 {
 	return 0;

fs/f2fs/verity.c

@@ -136,7 +136,7 @@ static int f2fs_begin_enable_verity(struct file *filp)
 	 * here and not rely on ->open() doing it.  This must be done before
 	 * evicting the inline data.
 	 */
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		return err;
 

fs/f2fs/xattr.c

@@ -773,7 +773,7 @@ int f2fs_setxattr(struct inode *inode, int index, const char *name,
 	if (!f2fs_is_checkpoint_ready(sbi))
 		return -ENOSPC;
 
-	err = dquot_initialize(inode);
+	err = f2fs_dquot_initialize(inode);
 	if (err)
 		return err;