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f2fs: support get_page error injection

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

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2017-10-28 16:52:30 +08:00 committed by Jaegeuk Kim
parent b32d73abc6
commit 01eccef793
5 changed files with 20 additions and 4 deletions
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2
fs/f2fs/data.c
View file

@ -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;

14
fs/f2fs/f2fs.h
View file

@ -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);

4
fs/f2fs/gc.c
View file

@ -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;

3
fs/f2fs/node.c
View file

@ -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;

1
fs/f2fs/super.c
View file

@ -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",