Commit d62fe971 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: support bio allocation error injection 



This patch adds to support bio allocation error injection to simulate
out-of-memory test scenario.

Signed-off-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 01eccef7

fs/f2fs/data.c

+2 −2
Original line number Diff line number Diff line
@@ -173,7 +173,7 @@ static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, 
{

	struct bio *bio;



	bio = f2fs_bio_alloc(npages);

	bio = f2fs_bio_alloc(sbi, npages, true);



	f2fs_target_device(sbi, blk_addr, bio);

	bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io;
@@ -473,7 +473,7 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr, 
		f2fs_wait_on_block_writeback(sbi, blkaddr);

	}



	bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES));

	bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);

	if (!bio) {

		if (ctx)

			fscrypt_release_ctx(ctx);

fs/f2fs/f2fs.h

+17 −6
Original line number Diff line number Diff line
@@ -47,6 +47,7 @@ enum { 
	FAULT_KMALLOC,

	FAULT_PAGE_ALLOC,

	FAULT_PAGE_GET,

	FAULT_ALLOC_BIO,

	FAULT_ALLOC_NID,

	FAULT_ORPHAN,

	FAULT_BLOCK,
@@ -1898,16 +1899,26 @@ static inline void *f2fs_kmem_cache_alloc(struct kmem_cache *cachep, 
	return entry;

}



static inline struct bio *f2fs_bio_alloc(int npages)

static inline struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi,

						int npages, bool no_fail)

{

	struct bio *bio;



	if (no_fail) {

		/* No failure on bio allocation */

		bio = bio_alloc(GFP_NOIO, npages);

		if (!bio)

			bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages);

		return bio;

	}

#ifdef CONFIG_F2FS_FAULT_INJECTION

	if (time_to_inject(sbi, FAULT_ALLOC_BIO)) {

		f2fs_show_injection_info(FAULT_ALLOC_BIO);

		return NULL;

	}

#endif

	return bio_alloc(GFP_KERNEL, npages);

}



static inline void f2fs_radix_tree_insert(struct radix_tree_root *root,

				unsigned long index, void *item)

fs/f2fs/segment.c

+1 −1
Original line number Diff line number Diff line
@@ -511,7 +511,7 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi) 
static int __submit_flush_wait(struct f2fs_sb_info *sbi,

				struct block_device *bdev)

{

	struct bio *bio = f2fs_bio_alloc(0);

	struct bio *bio = f2fs_bio_alloc(sbi, 0, true);

	int ret;



	bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;

fs/f2fs/super.c

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ char *fault_name[FAULT_MAX] = { 
	[FAULT_KMALLOC]		= "kmalloc",

	[FAULT_PAGE_ALLOC]	= "page alloc",

	[FAULT_PAGE_GET]	= "page get",

	[FAULT_ALLOC_BIO]	= "alloc bio",

	[FAULT_ALLOC_NID]	= "alloc nid",

	[FAULT_ORPHAN]		= "orphan",

	[FAULT_BLOCK]		= "no more block",