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Commit b8a938e4 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: support get_page error injection 



This patch adds to support get_page 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 f2b91f22

fs/f2fs/data.c

+1 −1
Original line number Diff line number Diff line
@@ -1965,7 +1965,7 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping, 
	 * Do not use grab_cache_page_write_begin() to avoid deadlock due to

	 * wait_for_stable_page. Will wait that below with our IO control.

	 */

	page = pagecache_get_page(mapping, index,

	page = f2fs_pagecache_get_page(mapping, index,

				FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);

	if (!page) {

		err = -ENOMEM;

fs/f2fs/f2fs.h

+14 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ 
enum {

	FAULT_KMALLOC,

	FAULT_PAGE_ALLOC,

	FAULT_PAGE_GET,

	FAULT_ALLOC_NID,

	FAULT_ORPHAN,

	FAULT_BLOCK,
@@ -1835,6 +1836,19 @@ static inline struct page *f2fs_grab_cache_page(struct address_space *mapping, 
	return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);

}



static inline struct page *f2fs_pagecache_get_page(

				struct address_space *mapping, pgoff_t index,

				int fgp_flags, gfp_t gfp_mask)

{

#ifdef CONFIG_F2FS_FAULT_INJECTION

	if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_GET)) {

		f2fs_show_injection_info(FAULT_PAGE_GET);

		return NULL;

	}

#endif

	return pagecache_get_page(mapping, index, fgp_flags, gfp_mask);

}



static inline void f2fs_copy_page(struct page *src, struct page *dst)

{

	char *src_kaddr = kmap(src);

fs/f2fs/gc.c

+2 −2
Original line number Diff line number Diff line
@@ -650,8 +650,8 @@ static void move_data_block(struct inode *inode, block_t bidx, 
	allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr,

					&sum, CURSEG_COLD_DATA, NULL, false);



	fio.encrypted_page = pagecache_get_page(META_MAPPING(fio.sbi), newaddr,

					FGP_LOCK | FGP_CREAT, GFP_NOFS);

	fio.encrypted_page = f2fs_pagecache_get_page(META_MAPPING(fio.sbi),

				newaddr, FGP_LOCK | FGP_CREAT, GFP_NOFS);

	if (!fio.encrypted_page) {

		err = -ENOMEM;

		goto recover_block;

fs/f2fs/node.c

+2 −1
Original line number Diff line number Diff line
@@ -1218,7 +1218,8 @@ static void flush_inline_data(struct f2fs_sb_info *sbi, nid_t ino) 
	if (!inode)

		return;



	page = pagecache_get_page(inode->i_mapping, 0, FGP_LOCK|FGP_NOWAIT, 0);

	page = f2fs_pagecache_get_page(inode->i_mapping, 0,

					FGP_LOCK|FGP_NOWAIT, 0);

	if (!page)

		goto iput_out;

fs/f2fs/super.c

+1 −0
Original line number Diff line number Diff line
@@ -44,6 +44,7 @@ static struct kmem_cache *f2fs_inode_cachep; 
char *fault_name[FAULT_MAX] = {

	[FAULT_KMALLOC]		= "kmalloc",

	[FAULT_PAGE_ALLOC]	= "page alloc",

	[FAULT_PAGE_GET]	= "page get",

	[FAULT_ALLOC_NID]	= "alloc nid",

	[FAULT_ORPHAN]		= "orphan",

	[FAULT_BLOCK]		= "no more block",