[PATCH 5.4 038/214] f2fs: fix error path in do_recover_data()

Greg Kroah-Hartman
2020-09-01T16:41:57Z

From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit 9627a7b31f3c4ff8bc8f3be3683983ffe6eaebe6 ]

- don't panic kernel if f2fs_get_node_page() fails in
f2fs_recover_inline_data() or f2fs_recover_inline_xattr();
- return error number of f2fs_truncate_blocks() to
f2fs_recover_inline_data()'s caller;

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/f2fs.h | 4 ++--
fs/f2fs/inline.c | 19 ++++++++++++-------
fs/f2fs/node.c | 6 ++++--
fs/f2fs/recovery.c | 10 ++++++++--
4 files changed, 26 insertions(+), 13 deletions(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 03693d6b1c104..b3b7e63394be7 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3061,7 +3061,7 @@ bool f2fs_alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid);
void f2fs_alloc_nid_done(struct f2fs_sb_info *sbi, nid_t nid);
void f2fs_alloc_nid_failed(struct f2fs_sb_info *sbi, nid_t nid);
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_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);
int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
@@ -3487,7 +3487,7 @@ int f2fs_read_inline_data(struct inode *inode, struct page *page);
int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page);
int f2fs_convert_inline_inode(struct inode *inode);
int f2fs_write_inline_data(struct inode *inode, struct page *page);
-bool f2fs_recover_inline_data(struct inode *inode, struct page *npage);
+int f2fs_recover_inline_data(struct inode *inode, struct page *npage);
struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
struct fscrypt_name *fname, struct page **res_page);
int f2fs_make_empty_inline_dir(struct inode *inode, struct inode *parent,
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 896db0416f0e6..183388393c6a8 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -252,7 +252,7 @@ int f2fs_write_inline_data(struct inode *inode, struct page *page)
return 0;
}

-bool f2fs_recover_inline_data(struct inode *inode, struct page *npage)
+int f2fs_recover_inline_data(struct inode *inode, struct page *npage)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct f2fs_inode *ri = NULL;
@@ -274,7 +274,8 @@ bool f2fs_recover_inline_data(struct inode *inode, struct page *npage)
ri && (ri->i_inline & F2FS_INLINE_DATA)) {
process_inline:
ipage = f2fs_get_node_page(sbi, inode->i_ino);
- f2fs_bug_on(sbi, IS_ERR(ipage));
+ if (IS_ERR(ipage))
+ return PTR_ERR(ipage);

f2fs_wait_on_page_writeback(ipage, NODE, true, true);

@@ -287,21 +288,25 @@ process_inline:

set_page_dirty(ipage);
f2fs_put_page(ipage, 1);
- return true;
+ return 1;
}

if (f2fs_has_inline_data(inode)) {
ipage = f2fs_get_node_page(sbi, inode->i_ino);
- f2fs_bug_on(sbi, IS_ERR(ipage));
+ if (IS_ERR(ipage))
+ return PTR_ERR(ipage);
f2fs_truncate_inline_inode(inode, ipage, 0);
clear_inode_flag(inode, FI_INLINE_DATA);
f2fs_put_page(ipage, 1);
} else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
- if (f2fs_truncate_blocks(inode, 0, false))
- return false;
+ int ret;
+
+ ret = f2fs_truncate_blocks(inode, 0, false);
+ if (ret)
+ return ret;
goto process_inline;
}
- return false;
+ return 0;
}

struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir,
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 90a20bd129614..daeac4268c1ab 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2512,7 +2512,7 @@ int f2fs_try_to_free_nids(struct f2fs_sb_info *sbi, int nr_shrink)
return nr - nr_shrink;
}

-void f2fs_recover_inline_xattr(struct inode *inode, struct page *page)
+int f2fs_recover_inline_xattr(struct inode *inode, struct page *page)
{
void *src_addr, *dst_addr;
size_t inline_size;
@@ -2520,7 +2520,8 @@ void f2fs_recover_inline_xattr(struct inode *inode, struct page *page)
struct f2fs_inode *ri;

ipage = f2fs_get_node_page(F2FS_I_SB(inode), inode->i_ino);
- f2fs_bug_on(F2FS_I_SB(inode), IS_ERR(ipage));
+ if (IS_ERR(ipage))
+ return PTR_ERR(ipage);

ri = F2FS_INODE(page);
if (ri->i_inline & F2FS_INLINE_XATTR) {
@@ -2539,6 +2540,7 @@ void f2fs_recover_inline_xattr(struct inode *inode, struct page *page)
update_inode:
f2fs_update_inode(inode, ipage);
f2fs_put_page(ipage, 1);
+ return 0;
}

int f2fs_recover_xattr_data(struct inode *inode, struct page *page)
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 783773e4560de..5f230e981c483 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -514,7 +514,9 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,

/* step 1: recover xattr */
if (IS_INODE(page)) {
- f2fs_recover_inline_xattr(inode, page);
+ err = f2fs_recover_inline_xattr(inode, page);
+ if (err)
+ goto out;
} else if (f2fs_has_xattr_block(ofs_of_node(page))) {
err = f2fs_recover_xattr_data(inode, page);
if (!err)
@@ -523,8 +525,12 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
}

/* step 2: recover inline data */
- if (f2fs_recover_inline_data(inode, page))
+ err = f2fs_recover_inline_data(inode, page);
+ if (err) {
+ if (err == 1)
+ err = 0;
goto out;
+ }

/* step 3: recover data indices */
start = f2fs_start_bidx_of_node(ofs_of_node(page), inode);
--
2.25.1