[PATCH 2/2] f2fs: add an option to avoid unnecessary BUG_ONs

From: Jaegeuk Kim
Date: Tue Oct 29 2013 - 02:54:36 EST

If you want to remove unnecessary BUG_ONs, you can just turn off F2FS_CHECK_FS
in your kernel config.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@xxxxxxxxxxx>
---
fs/f2fs/checkpoint.c | 10 +++++-----
fs/f2fs/data.c | 4 ++--
fs/f2fs/dir.c | 2 +-
fs/f2fs/f2fs.h | 22 ++++++++++++++--------
fs/f2fs/file.c | 2 +-
fs/f2fs/inode.c | 2 +-
fs/f2fs/node.c | 42 +++++++++++++++++++++---------------------
fs/f2fs/recovery.c | 10 +++++-----
fs/f2fs/segment.c | 16 ++++++++--------
fs/f2fs/segment.h | 10 ++++++----
fs/f2fs/xattr.c | 2 +-
11 files changed, 65 insertions(+), 57 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 6526f50..d430157 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -142,8 +142,8 @@ long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
for (i = 0; i < nr_pages; i++) {
struct page *page = pvec.pages[i];
lock_page(page);
- BUG_ON(page->mapping != mapping);
- BUG_ON(!PageDirty(page));
+ f2fs_bug_on(page->mapping != mapping);
+ f2fs_bug_on(!PageDirty(page));
clear_page_dirty_for_io(page);
if (f2fs_write_meta_page(page, &wbc)) {
unlock_page(page);
@@ -208,7 +208,7 @@ int acquire_orphan_inode(struct f2fs_sb_info *sbi)
void release_orphan_inode(struct f2fs_sb_info *sbi)
{
mutex_lock(&sbi->orphan_inode_mutex);
- BUG_ON(sbi->n_orphans == 0);
+ f2fs_bug_on(sbi->n_orphans == 0);
sbi->n_orphans--;
mutex_unlock(&sbi->orphan_inode_mutex);
}
@@ -252,7 +252,7 @@ void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
if (orphan->ino == ino) {
list_del(&orphan->list);
kmem_cache_free(orphan_entry_slab, orphan);
- BUG_ON(sbi->n_orphans == 0);
+ f2fs_bug_on(sbi->n_orphans == 0);
sbi->n_orphans--;
break;
}
@@ -263,7 +263,7 @@ void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
{
struct inode *inode = f2fs_iget(sbi->sb, ino);
- BUG_ON(IS_ERR(inode));
+ f2fs_bug_on(IS_ERR(inode));
clear_nlink(inode);

/* truncate all the data during iput */
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index c8887d8..aa3438c 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -110,7 +110,7 @@ void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn)
pgoff_t fofs, start_fofs, end_fofs;
block_t start_blkaddr, end_blkaddr;

- BUG_ON(blk_addr == NEW_ADDR);
+ f2fs_bug_on(blk_addr == NEW_ADDR);
fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) +
dn->ofs_in_node;

@@ -436,7 +436,7 @@ static int get_data_block_ro(struct inode *inode, sector_t iblock,
}

/* It does not support data allocation */
- BUG_ON(create);
+ f2fs_bug_on(create);

if (dn.data_blkaddr != NEW_ADDR && dn.data_blkaddr != NULL_ADDR) {
int i;
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index c9d53fc..594fc1b 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -139,7 +139,7 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir,
bool room = false;
int max_slots = 0;

- BUG_ON(level > MAX_DIR_HASH_DEPTH);
+ f2fs_bug_on(level > MAX_DIR_HASH_DEPTH);

nbucket = dir_buckets(level);
nblock = bucket_blocks(level);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index a61cc5f..6aaefdb 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -20,6 +20,12 @@
#include <linux/kobject.h>
#include <linux/sched.h>

+#ifdef CONFIG_F2FS_CHECK_FS
+#define f2fs_bug_on(condition) BUG_ON(condition)
+#else
+#define f2fs_bug_on(condition)
+#endif
+
/*
* For mount options
*/
@@ -584,8 +590,8 @@ static inline int dec_valid_block_count(struct f2fs_sb_info *sbi,
blkcnt_t count)
{
spin_lock(&sbi->stat_lock);
- BUG_ON(sbi->total_valid_block_count < (block_t) count);
- BUG_ON(inode->i_blocks < count);
+ f2fs_bug_on(sbi->total_valid_block_count < (block_t) count);
+ f2fs_bug_on(inode->i_blocks < count);
inode->i_blocks -= count;
sbi->total_valid_block_count -= (block_t)count;
spin_unlock(&sbi->stat_lock);
@@ -717,9 +723,9 @@ static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
{
spin_lock(&sbi->stat_lock);

- BUG_ON(sbi->total_valid_block_count < count);
- BUG_ON(sbi->total_valid_node_count < count);
- BUG_ON(inode->i_blocks < count);
+ f2fs_bug_on(sbi->total_valid_block_count < count);
+ f2fs_bug_on(sbi->total_valid_node_count < count);
+ f2fs_bug_on(inode->i_blocks < count);

inode->i_blocks -= count;
sbi->total_valid_node_count -= count;
@@ -740,7 +746,7 @@ static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
{
spin_lock(&sbi->stat_lock);
- BUG_ON(sbi->total_valid_inode_count == sbi->total_node_count);
+ f2fs_bug_on(sbi->total_valid_inode_count == sbi->total_node_count);
sbi->total_valid_inode_count++;
spin_unlock(&sbi->stat_lock);
}
@@ -748,7 +754,7 @@ static inline void inc_valid_inode_count(struct f2fs_sb_info *sbi)
static inline int dec_valid_inode_count(struct f2fs_sb_info *sbi)
{
spin_lock(&sbi->stat_lock);
- BUG_ON(!sbi->total_valid_inode_count);
+ f2fs_bug_on(!sbi->total_valid_inode_count);
sbi->total_valid_inode_count--;
spin_unlock(&sbi->stat_lock);
return 0;
@@ -769,7 +775,7 @@ static inline void f2fs_put_page(struct page *page, int unlock)
return;

if (unlock) {
- BUG_ON(!PageLocked(page));
+ f2fs_bug_on(!PageLocked(page));
unlock_page(page);
}
page_cache_release(page);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 2d4190a..58ed19a 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -296,7 +296,7 @@ static int truncate_blocks(struct inode *inode, u64 from)
count = ADDRS_PER_BLOCK;

count -= dn.ofs_in_node;
- BUG_ON(count < 0);
+ f2fs_bug_on(count < 0);

if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
truncate_data_blocks_range(&dn, count);
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 7377ca3..d0eaa9f 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -266,7 +266,7 @@ void f2fs_evict_inode(struct inode *inode)
inode->i_ino == F2FS_META_INO(sbi))
goto no_delete;

- BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
+ f2fs_bug_on(atomic_read(&F2FS_I(inode)->dirty_dents));
remove_dirty_dir_inode(inode);

if (inode->i_nlink || is_bad_inode(inode))
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 304d5ce..8e331d5 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -204,7 +204,7 @@ retry:
}
e->ni = *ni;
e->checkpointed = true;
- BUG_ON(ni->blk_addr == NEW_ADDR);
+ f2fs_bug_on(ni->blk_addr == NEW_ADDR);
} else if (new_blkaddr == NEW_ADDR) {
/*
* when nid is reallocated,
@@ -212,19 +212,19 @@ retry:
* So, reinitialize it with new information.
*/
e->ni = *ni;
- BUG_ON(ni->blk_addr != NULL_ADDR);
+ f2fs_bug_on(ni->blk_addr != NULL_ADDR);
}

if (new_blkaddr == NEW_ADDR)
e->checkpointed = false;

/* sanity check */
- BUG_ON(nat_get_blkaddr(e) != ni->blk_addr);
- BUG_ON(nat_get_blkaddr(e) == NULL_ADDR &&
+ f2fs_bug_on(nat_get_blkaddr(e) != ni->blk_addr);
+ f2fs_bug_on(nat_get_blkaddr(e) == NULL_ADDR &&
new_blkaddr == NULL_ADDR);
- BUG_ON(nat_get_blkaddr(e) == NEW_ADDR &&
+ f2fs_bug_on(nat_get_blkaddr(e) == NEW_ADDR &&
new_blkaddr == NEW_ADDR);
- BUG_ON(nat_get_blkaddr(e) != NEW_ADDR &&
+ f2fs_bug_on(nat_get_blkaddr(e) != NEW_ADDR &&
nat_get_blkaddr(e) != NULL_ADDR &&
new_blkaddr == NEW_ADDR);

@@ -495,10 +495,10 @@ static void truncate_node(struct dnode_of_data *dn)

get_node_info(sbi, dn->nid, &ni);
if (dn->inode->i_blocks == 0) {
- BUG_ON(ni.blk_addr != NULL_ADDR);
+ f2fs_bug_on(ni.blk_addr != NULL_ADDR);
goto invalidate;
}
- BUG_ON(ni.blk_addr == NULL_ADDR);
+ f2fs_bug_on(ni.blk_addr == NULL_ADDR);

/* Deallocate node address */
invalidate_blocks(sbi, ni.blk_addr);
@@ -822,7 +822,7 @@ int remove_inode_page(struct inode *inode)
}

/* 0 is possible, after f2fs_new_inode() is failed */
- BUG_ON(inode->i_blocks != 0 && inode->i_blocks != 1);
+ f2fs_bug_on(inode->i_blocks != 0 && inode->i_blocks != 1);
set_new_dnode(&dn, inode, page, page, ino);
truncate_node(&dn);
return 0;
@@ -863,7 +863,7 @@ struct page *new_node_page(struct dnode_of_data *dn,
get_node_info(sbi, dn->nid, &old_ni);

/* Reinitialize old_ni with new node page */
- BUG_ON(old_ni.blk_addr != NULL_ADDR);
+ f2fs_bug_on(old_ni.blk_addr != NULL_ADDR);
new_ni = old_ni;
new_ni.ino = dn->inode->i_ino;
set_node_addr(sbi, &new_ni, NEW_ADDR);
@@ -969,7 +969,7 @@ repeat:
goto repeat;
}
got_it:
- BUG_ON(nid != nid_of_node(page));
+ f2fs_bug_on(nid != nid_of_node(page));
mark_page_accessed(page);
return page;
}
@@ -1163,7 +1163,7 @@ static int f2fs_write_node_page(struct page *page,

/* get old block addr of this node page */
nid = nid_of_node(page);
- BUG_ON(page->index != nid);
+ f2fs_bug_on(page->index != nid);

get_node_info(sbi, nid, &ni);

@@ -1349,7 +1349,7 @@ static void scan_nat_page(struct f2fs_nm_info *nm_i,
break;

blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
- BUG_ON(blk_addr == NEW_ADDR);
+ f2fs_bug_on(blk_addr == NEW_ADDR);
if (blk_addr == NULL_ADDR) {
if (add_free_nid(nm_i, start_nid, true) < 0)
break;
@@ -1420,14 +1420,14 @@ retry:

/* We should not use stale free nids created by build_free_nids */
if (nm_i->fcnt && !sbi->on_build_free_nids) {
- BUG_ON(list_empty(&nm_i->free_nid_list));
+ f2fs_bug_on(list_empty(&nm_i->free_nid_list));
list_for_each(this, &nm_i->free_nid_list) {
i = list_entry(this, struct free_nid, list);
if (i->state == NID_NEW)
break;
}

- BUG_ON(i->state != NID_NEW);
+ f2fs_bug_on(i->state != NID_NEW);
*nid = i->nid;
i->state = NID_ALLOC;
nm_i->fcnt--;
@@ -1455,7 +1455,7 @@ void alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid)

spin_lock(&nm_i->free_nid_list_lock);
i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
- BUG_ON(!i || i->state != NID_ALLOC);
+ f2fs_bug_on(!i || i->state != NID_ALLOC);
__del_from_free_nid_list(i);
spin_unlock(&nm_i->free_nid_list_lock);
}
@@ -1473,7 +1473,7 @@ void alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid)

spin_lock(&nm_i->free_nid_list_lock);
i = __lookup_free_nid_list(nid, &nm_i->free_nid_list);
- BUG_ON(!i || i->state != NID_ALLOC);
+ f2fs_bug_on(!i || i->state != NID_ALLOC);
if (nm_i->fcnt > 2 * MAX_FREE_NIDS) {
__del_from_free_nid_list(i);
} else {
@@ -1676,7 +1676,7 @@ to_nat_page:
nat_blk = page_address(page);
}

- BUG_ON(!nat_blk);
+ f2fs_bug_on(!nat_blk);
raw_ne = nat_blk->entries[nid - start_nid];
flush_now:
new_blkaddr = nat_get_blkaddr(ne);
@@ -1780,11 +1780,11 @@ void destroy_node_manager(struct f2fs_sb_info *sbi)
/* destroy free nid list */
spin_lock(&nm_i->free_nid_list_lock);
list_for_each_entry_safe(i, next_i, &nm_i->free_nid_list, list) {
- BUG_ON(i->state == NID_ALLOC);
+ f2fs_bug_on(i->state == NID_ALLOC);
__del_from_free_nid_list(i);
nm_i->fcnt--;
}
- BUG_ON(nm_i->fcnt);
+ f2fs_bug_on(nm_i->fcnt);
spin_unlock(&nm_i->free_nid_list_lock);

/* destroy nat cache */
@@ -1798,7 +1798,7 @@ void destroy_node_manager(struct f2fs_sb_info *sbi)
__del_from_nat_cache(nm_i, e);
}
}
- BUG_ON(nm_i->nat_cnt);
+ f2fs_bug_on(nm_i->nat_cnt);
write_unlock(&nm_i->nat_tree_lock);

kfree(nm_i->nat_bitmap);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index b278c68..fdc8116 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -311,8 +311,8 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
wait_on_page_writeback(dn.node_page);

get_node_info(sbi, dn.nid, &ni);
- BUG_ON(ni.ino != ino_of_node(page));
- BUG_ON(ofs_of_node(dn.node_page) != ofs_of_node(page));
+ f2fs_bug_on(ni.ino != ino_of_node(page));
+ f2fs_bug_on(ofs_of_node(dn.node_page) != ofs_of_node(page));

for (; start < end; start++) {
block_t src, dest;
@@ -322,9 +322,9 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,

if (src != dest && dest != NEW_ADDR && dest != NULL_ADDR) {
if (src == NULL_ADDR) {
- int err = reserve_new_block(&dn);
+ err = reserve_new_block(&dn);
/* We should not get -ENOSPC */
- BUG_ON(err);
+ f2fs_bug_on(err);
}

/* Check the previous node page having this index */
@@ -447,7 +447,7 @@ int recover_fsync_data(struct f2fs_sb_info *sbi)

/* step #2: recover data */
err = recover_data(sbi, &inode_list, CURSEG_WARM_NODE);
- BUG_ON(!list_empty(&inode_list));
+ f2fs_bug_on(!list_empty(&inode_list));
out:
destroy_fsync_dnodes(&inode_list);
kmem_cache_destroy(fsync_entry_slab);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 8f92c18..c7161de 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -192,7 +192,7 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
new_vblocks = se->valid_blocks + del;
offset = GET_SEGOFF_FROM_SEG0(sbi, blkaddr) & (sbi->blocks_per_seg - 1);

- BUG_ON((new_vblocks >> (sizeof(unsigned short) << 3) ||
+ f2fs_bug_on((new_vblocks >> (sizeof(unsigned short) << 3) ||
(new_vblocks > sbi->blocks_per_seg)));

se->valid_blocks = new_vblocks;
@@ -232,7 +232,7 @@ void invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
unsigned int segno = GET_SEGNO(sbi, addr);
struct sit_info *sit_i = SIT_I(sbi);

- BUG_ON(addr == NULL_ADDR);
+ f2fs_bug_on(addr == NULL_ADDR);
if (addr == NEW_ADDR)
return;

@@ -347,7 +347,7 @@ find_other_zone:
if (dir == ALLOC_RIGHT) {
secno = find_next_zero_bit(free_i->free_secmap,
TOTAL_SECS(sbi), 0);
- BUG_ON(secno >= TOTAL_SECS(sbi));
+ f2fs_bug_on(secno >= TOTAL_SECS(sbi));
} else {
go_left = 1;
left_start = hint - 1;
@@ -363,7 +363,7 @@ find_other_zone:
}
left_start = find_next_zero_bit(free_i->free_secmap,
TOTAL_SECS(sbi), 0);
- BUG_ON(left_start >= TOTAL_SECS(sbi));
+ f2fs_bug_on(left_start >= TOTAL_SECS(sbi));
break;
}
secno = left_start;
@@ -402,7 +402,7 @@ skip_left:
}
got_it:
/* set it as dirty segment in free segmap */
- BUG_ON(test_bit(segno, free_i->free_segmap));
+ f2fs_bug_on(test_bit(segno, free_i->free_segmap));
__set_inuse(sbi, segno);
*newseg = segno;
write_unlock(&free_i->segmap_lock);
@@ -773,7 +773,7 @@ static int __get_segment_type(struct page *page, enum page_type p_type)
return __get_segment_type_4(page, p_type);
}
/* NR_CURSEG_TYPE(6) logs by default */
- BUG_ON(sbi->active_logs != NR_CURSEG_TYPE);
+ f2fs_bug_on(sbi->active_logs != NR_CURSEG_TYPE);
return __get_segment_type_6(page, p_type);
}

@@ -850,7 +850,7 @@ void write_data_page(struct inode *inode, struct page *page,
struct f2fs_summary sum;
struct node_info ni;

- BUG_ON(old_blkaddr == NULL_ADDR);
+ f2fs_bug_on(old_blkaddr == NULL_ADDR);
get_node_info(sbi, dn->nid, &ni);
set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);

@@ -1240,7 +1240,7 @@ static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
/* get current sit block page without lock */
src_page = get_meta_page(sbi, src_off);
dst_page = grab_meta_page(sbi, dst_off);
- BUG_ON(PageDirty(src_page));
+ f2fs_bug_on(PageDirty(src_page));

src_addr = page_address(src_page);
dst_addr = page_address(dst_page);
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index abe7094..001d4c4 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -522,16 +522,13 @@ static inline unsigned short curseg_blkoff(struct f2fs_sb_info *sbi, int type)
return curseg->next_blkoff;
}

+#ifdef CONFIG_F2FS_CHECK_FS
static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
{
unsigned int end_segno = SM_I(sbi)->segment_count - 1;
BUG_ON(segno > end_segno);
}

-/*
- * This function is used for only debugging.
- * NOTE: In future, we have to remove this function.
- */
static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t blk_addr)
{
struct f2fs_sm_info *sm_info = SM_I(sbi);
@@ -565,6 +562,11 @@ static inline void check_block_count(struct f2fs_sb_info *sbi,
valid_blocks++;
BUG_ON(GET_SIT_VBLOCKS(raw_sit) != valid_blocks);
}
+#else
+#define check_seg_range(sbi, segno)
+#define verify_block_addr(sbi, blk_addr)
+#define check_block_count(sbi, segno, raw_sit)
+#endif

static inline pgoff_t current_sit_addr(struct f2fs_sb_info *sbi,
unsigned int start)
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index f685138..89d506d 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -372,7 +372,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
alloc_nid_failed(sbi, new_nid);
return PTR_ERR(xpage);
}
- BUG_ON(new_nid);
+ f2fs_bug_on(new_nid);
} else {
struct dnode_of_data dn;
set_new_dnode(&dn, inode, NULL, NULL, new_nid);
--
1.8.4.474.g128a96c

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