[PATCH 2/4] f2fs: inject to produce some orphan inodes

[Jaegeuk Kim <jaegeuk@kernel.org>]

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/f2fs.h  | 3 +++
 fs/f2fs/inode.c | 5 +++++
 fs/f2fs/super.c | 1 +
 3 files changed, 9 insertions(+)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 5daba19..c4697b7 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -45,6 +45,7 @@ enum {
 	FAULT_ORPHAN,
 	FAULT_BLOCK,
 	FAULT_DIR_DEPTH,
+	FAULT_EVICT_INODE,
 	FAULT_MAX,
 };
 
@@ -74,6 +75,8 @@ static inline bool time_to_inject(int type)
 		return false;
 	else if (type == FAULT_DIR_DEPTH && !IS_FAULT_SET(type))
 		return false;
+	else if (type == FAULT_EVICT_INODE && !IS_FAULT_SET(type))
+		return false;
 
 	atomic_inc(&f2fs_fault.inject_ops);
 	if (atomic_read(&f2fs_fault.inject_ops) >= f2fs_fault.inject_rate) {
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index bdd814d..11cb60a 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -345,6 +345,11 @@ void f2fs_evict_inode(struct inode *inode)
 	if (inode->i_nlink || is_bad_inode(inode))
 		goto no_delete;
 
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+	if (time_to_inject(FAULT_EVICT_INODE))
+		goto no_delete;
+#endif
+
 	sb_start_intwrite(inode->i_sb);
 	set_inode_flag(inode, FI_NO_ALLOC);
 	i_size_write(inode, 0);
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index a5b5739..27f76819e 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -49,6 +49,7 @@ char *fault_name[FAULT_MAX] = {
 	[FAULT_ORPHAN]		= "orphan",
 	[FAULT_BLOCK]		= "no more block",
 	[FAULT_DIR_DEPTH]	= "too big dir depth",
+	[FAULT_EVICT_INODE]	= "evict_inode fail",
 };
 
 static void f2fs_build_fault_attr(unsigned int rate)
-- 
2.6.3