Commit 11207646 authored Jan 20, 2026 by Chao Yu Committed by Jaegeuk Kim Jan 27, 2026

f2fs: introduce FAULT_SKIP_WRITE



In order to simulate skipped write during enable_checkpoint().

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

parent ab59919c

Documentation/ABI/testing/sysfs-fs-f2fs

+1 −0

Original line number	Diff line number	Diff line
		@@ -744,6 +744,7 @@ Description: Support configuring fault injection type, should be
		FAULT_ATOMIC_TIMEOUT 0x00400000 (1000ms)
		FAULT_VMALLOC 0x00800000
		FAULT_LOCK_TIMEOUT 0x01000000 (1000ms)
		FAULT_SKIP_WRITE 0x02000000
		=========================== ==========

		What: /sys/fs/f2fs/<disk>/discard_io_aware_gran

Documentation/filesystems/f2fs.rst

+1 −0

Original line number	Diff line number	Diff line
		@@ -218,6 +218,7 @@ fault_type=%d Support configuring fault injection type, should be
		FAULT_ATOMIC_TIMEOUT 0x00400000 (1000ms)
		FAULT_VMALLOC 0x00800000
		FAULT_LOCK_TIMEOUT 0x01000000 (1000ms)
		FAULT_SKIP_WRITE 0x02000000
		=========================== ==========
		mode=%s Control block allocation mode which supports "adaptive"
		and "lfs". In "lfs" mode, there should be no random

fs/f2fs/data.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -2921,6 +2921,10 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
		goto got_it;
		}

		if (is_sbi_flag_set(fio->sbi, SBI_ENABLE_CHECKPOINT) &&
		time_to_inject(fio->sbi, FAULT_SKIP_WRITE))
		return -EINVAL;

		/* Deadlock due to between page->lock and f2fs_lock_op */
		if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi, &lc))
		return -EAGAIN;

fs/f2fs/f2fs.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -66,6 +66,7 @@ enum {
		FAULT_ATOMIC_TIMEOUT,
		FAULT_VMALLOC,
		FAULT_LOCK_TIMEOUT,
		FAULT_SKIP_WRITE,
		FAULT_MAX,
		};

fs/f2fs/super.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -70,6 +70,7 @@ const char *f2fs_fault_name[FAULT_MAX] = {
		[FAULT_ATOMIC_TIMEOUT] = "atomic timeout",
		[FAULT_VMALLOC] = "vmalloc",
		[FAULT_LOCK_TIMEOUT] = "lock timeout",
		[FAULT_SKIP_WRITE] = "skip write",
		};

		int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate,