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Message-Id: <20180813213909.3125189-1-arnd@arndb.de>
Date: Mon, 13 Aug 2018 23:38:06 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <yuchao0@...wei.com>
Cc: Arnd Bergmann <arnd@...db.de>, Yunlei He <heyunlei@...wei.com>,
Sheng Yong <shengyong1@...wei.com>,
linux-f2fs-devel@...ts.sourceforge.net,
linux-kernel@...r.kernel.org
Subject: [PATCH] f2fs: rework fault injection handling to avoid a warning
When CONFIG_F2FS_FAULT_INJECTION is disabled, we get a warning about an
unused label:
fs/f2fs/segment.c: In function '__submit_discard_cmd':
fs/f2fs/segment.c:1059:1: error: label 'submit' defined but not used [-Werror=unused-label]
This could be fixed by adding another #ifdef around it, but the more
reliable way of doing this seems to be to remove the other #ifdefs
where that is easily possible.
By defining time_to_inject() as a trivial stub, most of the checks for
CONFIG_F2FS_FAULT_INJECTION can go away. This also leads to nicer
formatting of the code.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
fs/f2fs/checkpoint.c | 3 +--
fs/f2fs/data.c | 2 --
fs/f2fs/dir.c | 3 +--
fs/f2fs/f2fs.h | 50 ++++++++++++++++++++++----------------------
fs/f2fs/file.c | 3 +--
fs/f2fs/gc.c | 2 --
fs/f2fs/inode.c | 3 +--
fs/f2fs/node.c | 3 +--
fs/f2fs/recovery.c | 5 ++---
fs/f2fs/segment.c | 4 ----
10 files changed, 32 insertions(+), 46 deletions(-)
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 3ab7a00c0641..e8b6b89bddb8 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -555,13 +555,12 @@ int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi)
spin_lock(&im->ino_lock);
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_ORPHAN)) {
spin_unlock(&im->ino_lock);
f2fs_show_injection_info(FAULT_ORPHAN);
return -ENOSPC;
}
-#endif
+
if (unlikely(im->ino_num >= sbi->max_orphans))
err = -ENOSPC;
else
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 67dc5fd8d4d5..773f82bbb618 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -126,12 +126,10 @@ static bool f2fs_bio_post_read_required(struct bio *bio)
static void f2fs_read_end_io(struct bio *bio)
{
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(F2FS_P_SB(bio_first_page_all(bio)), FAULT_IO)) {
f2fs_show_injection_info(FAULT_IO);
bio->bi_status = BLK_STS_IOERR;
}
-#endif
if (f2fs_bio_post_read_required(bio)) {
struct bio_post_read_ctx *ctx = bio->bi_private;
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 9c2a23242f64..01006085904a 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -517,12 +517,11 @@ int f2fs_add_regular_entry(struct inode *dir, const struct qstr *new_name,
}
start:
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(F2FS_I_SB(dir), FAULT_DIR_DEPTH)) {
f2fs_show_injection_info(FAULT_DIR_DEPTH);
return -ENOSPC;
}
-#endif
+
if (unlikely(current_depth == MAX_DIR_HASH_DEPTH))
return -ENOSPC;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a8ae1c73d3b3..8d2086e2571b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -41,7 +41,6 @@
} while (0)
#endif
-#ifdef CONFIG_F2FS_FAULT_INJECTION
enum {
FAULT_KMALLOC,
FAULT_KVMALLOC,
@@ -60,6 +59,7 @@ enum {
FAULT_MAX,
};
+#ifdef CONFIG_F2FS_FAULT_INJECTION
#define F2FS_ALL_FAULT_TYPE ((1 << FAULT_MAX) - 1)
struct f2fs_fault_info {
@@ -1326,6 +1326,12 @@ static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
}
return false;
}
+#else
+#define f2fs_show_injection_info(type) do { } while (0)
+static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
+{
+ return false;
+}
#endif
/* For write statistics. Suppose sector size is 512 bytes,
@@ -1678,13 +1684,12 @@ static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
if (ret)
return ret;
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_BLOCK)) {
f2fs_show_injection_info(FAULT_BLOCK);
release = *count;
goto enospc;
}
-#endif
+
/*
* let's increase this in prior to actual block count change in order
* for f2fs_sync_file to avoid data races when deciding checkpoint.
@@ -1893,12 +1898,10 @@ static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
return ret;
}
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_BLOCK)) {
f2fs_show_injection_info(FAULT_BLOCK);
goto enospc;
}
-#endif
spin_lock(&sbi->stat_lock);
@@ -1983,22 +1986,23 @@ static inline s64 valid_inode_count(struct f2fs_sb_info *sbi)
static inline struct page *f2fs_grab_cache_page(struct address_space *mapping,
pgoff_t index, bool for_write)
{
-#ifdef CONFIG_F2FS_FAULT_INJECTION
struct page *page;
- if (!for_write)
- page = find_get_page_flags(mapping, index,
- FGP_LOCK | FGP_ACCESSED);
- else
- page = find_lock_page(mapping, index);
- if (page)
- return page;
+ if (IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION)) {
+ if (!for_write)
+ page = find_get_page_flags(mapping, index,
+ FGP_LOCK | FGP_ACCESSED);
+ else
+ page = find_lock_page(mapping, index);
+ if (page)
+ return page;
- if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC)) {
- f2fs_show_injection_info(FAULT_PAGE_ALLOC);
- return NULL;
+ if (time_to_inject(F2FS_M_SB(mapping), FAULT_PAGE_ALLOC)) {
+ f2fs_show_injection_info(FAULT_PAGE_ALLOC);
+ return NULL;
+ }
}
-#endif
+
if (!for_write)
return grab_cache_page(mapping, index);
return grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS);
@@ -2008,12 +2012,11 @@ 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);
}
@@ -2078,12 +2081,11 @@ static inline struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi,
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);
}
@@ -2618,12 +2620,11 @@ static inline bool f2fs_may_extent_tree(struct inode *inode)
static inline void *f2fs_kmalloc(struct f2fs_sb_info *sbi,
size_t size, gfp_t flags)
{
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_KMALLOC)) {
f2fs_show_injection_info(FAULT_KMALLOC);
return NULL;
}
-#endif
+
return kmalloc(size, flags);
}
@@ -2636,12 +2637,11 @@ static inline void *f2fs_kzalloc(struct f2fs_sb_info *sbi,
static inline void *f2fs_kvmalloc(struct f2fs_sb_info *sbi,
size_t size, gfp_t flags)
{
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_KVMALLOC)) {
f2fs_show_injection_info(FAULT_KVMALLOC);
return NULL;
}
-#endif
+
return kvmalloc(size, flags);
}
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 560751adba01..6f14e7d16e9d 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -668,12 +668,11 @@ int f2fs_truncate(struct inode *inode)
trace_f2fs_truncate(inode);
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
f2fs_show_injection_info(FAULT_TRUNCATE);
return -EIO;
}
-#endif
+
/* we should check inline_data size */
if (!f2fs_may_inline_data(inode)) {
err = f2fs_convert_inline_inode(inode);
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 87a6b4675987..c598ae5ecbfa 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -53,12 +53,10 @@ static int gc_thread_func(void *data)
continue;
}
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
f2fs_show_injection_info(FAULT_CHECKPOINT);
f2fs_stop_checkpoint(sbi, false);
}
-#endif
if (!sb_start_write_trylock(sbi->sb))
continue;
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index fc2c98b9e255..6908896a1950 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -659,12 +659,11 @@ void f2fs_evict_inode(struct inode *inode)
if (F2FS_HAS_BLOCKS(inode))
err = f2fs_truncate(inode);
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
f2fs_show_injection_info(FAULT_EVICT_INODE);
err = -EIO;
}
-#endif
+
if (!err) {
f2fs_lock_op(sbi);
err = f2fs_remove_inode_page(inode);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 3c93f6cbc3cd..0bae5eda056a 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2321,12 +2321,11 @@ bool f2fs_alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid)
struct f2fs_nm_info *nm_i = NM_I(sbi);
struct free_nid *i = NULL;
retry:
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_ALLOC_NID)) {
f2fs_show_injection_info(FAULT_ALLOC_NID);
return false;
}
-#endif
+
spin_lock(&nm_i->nid_list_lock);
if (unlikely(nm_i->available_nids == 0)) {
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 64e5a59a270a..95511ed11a22 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -518,10 +518,9 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
if (src == NULL_ADDR) {
err = f2fs_reserve_new_block(&dn);
-#ifdef CONFIG_F2FS_FAULT_INJECTION
- while (err)
+ while (err &&
+ IS_ENABLED(CONFIG_F2FS_FAULT_INJECTION))
err = f2fs_reserve_new_block(&dn);
-#endif
/* We should not get -ENOSPC */
f2fs_bug_on(sbi, err);
if (err)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 43f127b48447..41769c77b7cc 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -474,12 +474,10 @@ int f2fs_commit_inmem_pages(struct inode *inode)
*/
void f2fs_balance_fs(struct f2fs_sb_info *sbi, bool need)
{
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_CHECKPOINT)) {
f2fs_show_injection_info(FAULT_CHECKPOINT);
f2fs_stop_checkpoint(sbi, false);
}
-#endif
/* balance_fs_bg is able to be pending */
if (need && excess_cached_nats(sbi))
@@ -1045,13 +1043,11 @@ static int __submit_discard_cmd(struct f2fs_sb_info *sbi,
dc->len += len;
-#ifdef CONFIG_F2FS_FAULT_INJECTION
if (time_to_inject(sbi, FAULT_DISCARD)) {
f2fs_show_injection_info(FAULT_DISCARD);
err = -EIO;
goto submit;
}
-#endif
err = __blkdev_issue_discard(bdev,
SECTOR_FROM_BLOCK(start),
SECTOR_FROM_BLOCK(len),
--
2.18.0
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