commit 98ffffd90fb19adcbcd48e4d8c477305d8203349
author Jaegeuk Kim <jaegeuk@kernel.org> Fri Apr 29 16:29:22 2016 -0700
committer chrmhoffmann <chrmhoffmann@gmail.com> Mon Nov 13 22:14:38 2017 +0100
tree 9c68982c51ee31e697a058dd97d7dcf0fafcd3a7
parent e3fff18dd2bbb6cfc69953b9512297ab44b0fa50

f2fs: inject ENOSPC failures

This patch injects ENOSPC failures.

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

fs/f2fs/checkpoint.c

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 6e5d752..e39ff1d 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -475,6 +475,13 @@
 	int err = 0;
 
 	spin_lock(&im->ino_lock);
+
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+	if (time_to_inject(FAULT_ORPHAN)) {
+		spin_unlock(&im->ino_lock);
+		return -ENOSPC;
+	}
+#endif
 	if (unlikely(im->ino_num >= sbi->max_orphans))
 		err = -ENOSPC;
 	else

fs/f2fs/dir.c

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 6a525d3..22236ab 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -537,6 +537,10 @@
 	}
 
 start:
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+	if (time_to_inject(FAULT_DIR_DEPTH))
+		return -ENOSPC;
+#endif
 	if (unlikely(current_depth == MAX_DIR_HASH_DEPTH))
 		return -ENOSPC;
 

fs/f2fs/f2fs.h

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 954dfa1..7205a4d 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -41,6 +41,10 @@
 enum {
 	FAULT_KMALLOC,
 	FAULT_PAGE_ALLOC,
+	FAULT_ALLOC_NID,
+	FAULT_ORPHAN,
+	FAULT_BLOCK,
+	FAULT_DIR_DEPTH,
 	FAULT_MAX,
 };
 
@@ -1114,6 +1118,12 @@
 	block_t	valid_block_count;
 
 	spin_lock(&sbi->stat_lock);
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+	if (time_to_inject(FAULT_BLOCK)) {
+		spin_unlock(&sbi->stat_lock);
+		return false;
+	}
+#endif
 	valid_block_count =
 		sbi->total_valid_block_count + (block_t)count;
 	if (unlikely(valid_block_count > sbi->user_block_count)) {

fs/f2fs/node.c

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 3326cd9..2a753a8 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1853,6 +1853,10 @@
 	struct f2fs_nm_info *nm_i = NM_I(sbi);
 	struct free_nid *i = NULL;
 retry:
+#ifdef CONFIG_F2FS_FAULT_INJECTION
+	if (time_to_inject(FAULT_ALLOC_NID))
+		return false;
+#endif
 	if (unlikely(sbi->total_valid_node_count + 1 > nm_i->available_nids))
 		return false;
 

fs/f2fs/super.c

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index ca7532a..e80f0a4 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -46,6 +46,10 @@
 char *fault_name[FAULT_MAX] = {
 	[FAULT_KMALLOC]		= "kmalloc",
 	[FAULT_PAGE_ALLOC]	= "page alloc",
+	[FAULT_ALLOC_NID]	= "alloc nid",
+	[FAULT_ORPHAN]		= "orphan",
+	[FAULT_BLOCK]		= "no more block",
+	[FAULT_DIR_DEPTH]	= "too big dir depth",
 };
 #endif