Commit 8b10d365 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: introduce FAULT_NO_SEGMENT 



Use it to simulate no free segment case during block allocation.

Signed-off-by: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent ea59b12a

Documentation/ABI/testing/sysfs-fs-f2fs

+1 −0
Original line number Diff line number Diff line
@@ -724,6 +724,7 @@ Description: Support configuring fault injection type, should be 
		FAULT_LOCK_OP                    0x000020000

		FAULT_BLKADDR_VALIDITY           0x000040000

		FAULT_BLKADDR_CONSISTENCE        0x000080000

		FAULT_NO_SEGMENT                 0x000100000

		===========================      ===========



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

Documentation/filesystems/f2fs.rst

+1 −0
Original line number Diff line number Diff line
@@ -205,6 +205,7 @@ fault_type=%d Support configuring fault injection type, should be 
			 FAULT_LOCK_OP                    0x000020000

			 FAULT_BLKADDR_VALIDITY           0x000040000

			 FAULT_BLKADDR_CONSISTENCE        0x000080000

			 FAULT_NO_SEGMENT                 0x000100000

			 ===========================      ===========

mode=%s			 Control block allocation mode which supports "adaptive"

			 and "lfs". In "lfs" mode, there should be no random

fs/f2fs/f2fs.h

+1 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ enum { 
	FAULT_LOCK_OP,

	FAULT_BLKADDR_VALIDITY,

	FAULT_BLKADDR_CONSISTENCE,

	FAULT_NO_SEGMENT,

	FAULT_MAX,

};

fs/f2fs/segment.c

+5 −0
Original line number Diff line number Diff line
@@ -2656,6 +2656,11 @@ static int get_new_segment(struct f2fs_sb_info *sbi, 


	spin_lock(&free_i->segmap_lock);



	if (time_to_inject(sbi, FAULT_NO_SEGMENT)) {

		ret = -ENOSPC;

		goto out_unlock;

	}



	if (!new_sec && ((*newseg + 1) % SEGS_PER_SEC(sbi))) {

		segno = find_next_zero_bit(free_i->free_segmap,

			GET_SEG_FROM_SEC(sbi, hint + 1), *newseg + 1);

fs/f2fs/super.c

+1 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ const char *f2fs_fault_name[FAULT_MAX] = { 
	[FAULT_LOCK_OP]			= "lock_op",

	[FAULT_BLKADDR_VALIDITY]	= "invalid blkaddr",

	[FAULT_BLKADDR_CONSISTENCE]	= "inconsistent blkaddr",

	[FAULT_NO_SEGMENT]		= "no free segment",

};



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