This patch adds to support bio allocation error injection to simulate out-of-memory test scenario.
Signed-off-by: Chao Yu <[email protected]> --- fs/f2fs/data.c | 4 ++-- fs/f2fs/f2fs.h | 23 +++++++++++++++++------ fs/f2fs/segment.c | 2 +- fs/f2fs/super.c | 1 + 4 files changed, 21 insertions(+), 9 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 7099f1d51bab..c5c926246658 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -172,7 +172,7 @@ 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; @@ -472,7 +472,7 @@ 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); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 6d2984abc50f..ddcd8f876938 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -47,6 +47,7 @@ enum { FAULT_KMALLOC, FAULT_PAGE_ALLOC, FAULT_PAGE_GET, + FAULT_ALLOC_BIO, FAULT_ALLOC_NID, FAULT_ORPHAN, FAULT_BLOCK, @@ -1906,15 +1907,25 @@ 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; - /* No failure on bio allocation */ - bio = bio_alloc(GFP_NOIO, npages); - if (!bio) - bio = bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages); - return 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, diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 2fe3343d876c..f75685418d9f 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -473,7 +473,7 @@ 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; diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 02d98401c52b..957e80602a7d 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -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", -- 2.13.1.388.g69e6b9b4f4a9 ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
