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Subject[PATCH 5/5] f2fs: fix to propagate error from __get_meta_page()
Date
From: Chao Yu <yuchao0@huawei.com>

If caller of __get_meta_page() can handle error, let's propagate error
from __get_meta_page().

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/checkpoint.c | 21 +++++++++++++++++----
fs/f2fs/f2fs.h | 2 +-
fs/f2fs/node.c | 27 +++++++++++++++++++--------
fs/f2fs/recovery.c | 8 ++++++++
fs/f2fs/segment.c | 33 +++++++++++++++++++++++++++------
5 files changed, 72 insertions(+), 19 deletions(-)

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 41e6e5769a2c..cae2b5785bbb 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -71,6 +71,7 @@ static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
.encrypted_page = NULL,
.is_meta = is_meta,
};
+ int err;

if (unlikely(!is_meta))
fio.op_flags &= ~REQ_META;
@@ -85,11 +86,11 @@ static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,

fio.page = page;

- if (f2fs_submit_page_bio(&fio)) {
+ err = f2fs_submit_page_bio(&fio);
+ if (err) {
memset(page_address(page), 0, PAGE_SIZE);
f2fs_stop_checkpoint(sbi, false);
- f2fs_bug_on(sbi, 1);
- return page;
+ return ERR_PTR(err);
}

lock_page(page);
@@ -106,6 +107,7 @@ static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
if (unlikely(!PageUptodate(page))) {
memset(page_address(page), 0, PAGE_SIZE);
f2fs_stop_checkpoint(sbi, false);
+ return ERR_PTR(-EIO);
}
out:
return page;
@@ -658,9 +660,15 @@ int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);

for (i = 0; i < orphan_blocks; i++) {
- struct page *page = f2fs_get_meta_page(sbi, start_blk + i);
+ struct page *page;
struct f2fs_orphan_block *orphan_blk;

+ page = f2fs_get_meta_page(sbi, start_blk + i);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto out;
+ }
+
orphan_blk = (struct f2fs_orphan_block *)page_address(page);
for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
@@ -751,6 +759,9 @@ static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
__u32 crc = 0;

*cp_page = f2fs_get_meta_page(sbi, cp_addr);
+ if (IS_ERR(*cp_page))
+ return PTR_ERR(*cp_page);
+
*cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);

crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
@@ -876,6 +887,8 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
unsigned char *ckpt = (unsigned char *)sbi->ckpt;

cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
+ if (IS_ERR(cur_page))
+ goto free_fail_no_cp;
sit_bitmap_ptr = page_address(cur_page);
memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
f2fs_put_page(cur_page, 1);
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 359526d88d3f..76b51a0de3cd 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2864,7 +2864,7 @@ int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink);
void f2fs_recover_inline_xattr(struct inode *inode, struct page *page);
int f2fs_recover_xattr_data(struct inode *inode, struct page *page);
int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page);
-void f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
+int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
unsigned int segno, struct f2fs_summary_block *sum);
void f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index c48e2a2e5e82..248d401bf40a 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -113,25 +113,26 @@ static void clear_node_page_dirty(struct page *page)

static struct page *get_current_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
{
- pgoff_t index = current_nat_addr(sbi, nid);
- return f2fs_get_meta_page(sbi, index);
+ struct page *page;
+
+ page = f2fs_get_meta_page(sbi, current_nat_addr(sbi, nid));
+ BUG_ON(IS_ERR(page));
+ return page;
}

static struct page *get_next_nat_page(struct f2fs_sb_info *sbi, nid_t nid)
{
struct page *src_page;
struct page *dst_page;
- pgoff_t src_off;
pgoff_t dst_off;
void *src_addr;
void *dst_addr;
struct f2fs_nm_info *nm_i = NM_I(sbi);

- src_off = current_nat_addr(sbi, nid);
- dst_off = next_nat_addr(sbi, src_off);
+ dst_off = next_nat_addr(sbi, current_nat_addr(sbi, nid));

/* get current nat block page with lock */
- src_page = f2fs_get_meta_page(sbi, src_off);
+ src_page = get_current_nat_page(sbi, nid);
dst_page = f2fs_grab_meta_page(sbi, dst_off);
f2fs_bug_on(sbi, PageDirty(src_page));

@@ -2502,7 +2503,7 @@ int f2fs_recover_inode_page(struct f2fs_sb_info *sbi, struct page *page)
return 0;
}

-void f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
+int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
unsigned int segno, struct f2fs_summary_block *sum)
{
struct f2fs_node *rn;
@@ -2524,6 +2525,9 @@ void f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
for (idx = addr; idx < addr + nrpages; idx++) {
struct page *page = f2fs_get_tmp_page(sbi, idx);

+ if (IS_ERR(page))
+ return PTR_ERR(page);
+
rn = F2FS_NODE(page);
sum_entry->nid = rn->footer.nid;
sum_entry->version = 0;
@@ -2535,6 +2539,7 @@ void f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
invalidate_mapping_pages(META_MAPPING(sbi), addr,
addr + nrpages);
}
+ return 0;
}

static void remove_nats_in_journal(struct f2fs_sb_info *sbi)
@@ -2771,7 +2776,13 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
nat_bits_addr = __start_cp_addr(sbi) + sbi->blocks_per_seg -
nm_i->nat_bits_blocks;
for (i = 0; i < nm_i->nat_bits_blocks; i++) {
- struct page *page = f2fs_get_meta_page(sbi, nat_bits_addr++);
+ struct page *page;
+
+ page = f2fs_get_meta_page(sbi, nat_bits_addr++);
+ if (IS_ERR(page)) {
+ disable_nat_bits(sbi, true);
+ return PTR_ERR(page);
+ }

memcpy(nm_i->nat_bits + (i << F2FS_BLKSIZE_BITS),
page_address(page), F2FS_BLKSIZE);
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 0d927ae26c48..ac70d5547a97 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -256,6 +256,10 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
return 0;

page = f2fs_get_tmp_page(sbi, blkaddr);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ break;
+ }

if (!is_recoverable_dnode(page))
break;
@@ -574,6 +578,10 @@ static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list,
f2fs_ra_meta_pages_cond(sbi, blkaddr);

page = f2fs_get_tmp_page(sbi, blkaddr);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ break;
+ }

if (!is_recoverable_dnode(page)) {
f2fs_put_page(page, 1);
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index e55188975fcc..22600002c690 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -2096,7 +2096,11 @@ int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
*/
struct page *f2fs_get_sum_page(struct f2fs_sb_info *sbi, unsigned int segno)
{
- return f2fs_get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
+ struct page *page;
+
+ page = f2fs_get_meta_page(sbi, GET_SUM_BLOCK(sbi, segno));
+ BUG_ON(IS_ERR(page));
+ return page;
}

void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
@@ -3122,7 +3126,7 @@ void f2fs_wait_on_block_writeback(struct f2fs_sb_info *sbi, block_t blkaddr)
}
}

-static void read_compacted_summaries(struct f2fs_sb_info *sbi)
+static int read_compacted_summaries(struct f2fs_sb_info *sbi)
{
struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
struct curseg_info *seg_i;
@@ -3134,6 +3138,8 @@ static void read_compacted_summaries(struct f2fs_sb_info *sbi)
start = start_sum_block(sbi);

page = f2fs_get_meta_page(sbi, start++);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
kaddr = (unsigned char *)page_address(page);

/* Step 1: restore nat cache */
@@ -3174,11 +3180,14 @@ static void read_compacted_summaries(struct f2fs_sb_info *sbi)
page = NULL;

page = f2fs_get_meta_page(sbi, start++);
+ if (IS_ERR(page))
+ return PTR_ERR(page);
kaddr = (unsigned char *)page_address(page);
offset = 0;
}
}
f2fs_put_page(page, 1);
+ return 0;
}

static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
@@ -3190,6 +3199,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
unsigned short blk_off;
unsigned int segno = 0;
block_t blk_addr = 0;
+ int err = 0;

/* get segment number and block addr */
if (IS_DATASEG(type)) {
@@ -3213,6 +3223,8 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
}

new = f2fs_get_meta_page(sbi, blk_addr);
+ if (IS_ERR(new))
+ return PTR_ERR(new);
sum = (struct f2fs_summary_block *)page_address(new);

if (IS_NODESEG(type)) {
@@ -3224,7 +3236,9 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
ns->ofs_in_node = 0;
}
} else {
- f2fs_restore_node_summary(sbi, segno, sum);
+ err = f2fs_restore_node_summary(sbi, segno, sum);
+ if (err)
+ goto out;
}
}

@@ -3244,8 +3258,9 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
curseg->alloc_type = ckpt->alloc_type[type];
curseg->next_blkoff = blk_off;
mutex_unlock(&curseg->curseg_mutex);
+out:
f2fs_put_page(new, 1);
- return 0;
+ return err;
}

static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
@@ -3263,7 +3278,9 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
META_CP, true);

/* restore for compacted data summary */
- read_compacted_summaries(sbi);
+ err = read_compacted_summaries(sbi);
+ if (err)
+ return err;
type = CURSEG_HOT_NODE;
}

@@ -3394,7 +3411,11 @@ int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
static struct page *get_current_sit_page(struct f2fs_sb_info *sbi,
unsigned int segno)
{
- return f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
+ struct page *page;
+
+ page = f2fs_get_meta_page(sbi, current_sit_addr(sbi, segno));
+ BUG_ON(IS_ERR(page));
+ return page;
}

static struct page *get_next_sit_page(struct f2fs_sb_info *sbi,
--
2.16.2.17.g38e79b1fd
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