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| author | Chao Yu <chao2.yu@samsung.com> | 2015-08-07 17:58:43 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-08-14 16:02:14 -0700 |
| commit | 8c14bfadeac2a01b305ef4434907295b81b58db2 (patch) | |
| tree | 3eda77311b4fefdb284ef157e46ff50a21710873 /fs/f2fs | |
| parent | 47e70ca46f9074efe6573263c0de5bef0af829de (diff) | |
| download | lwn-8c14bfadeac2a01b305ef4434907295b81b58db2.tar.gz lwn-8c14bfadeac2a01b305ef4434907295b81b58db2.zip | |
f2fs: handle error of f2fs_iget correctly
In recover_orphan_inode, whenever f2fs_iget fail, we will make kernel panic,
but it's not reasonable, because f2fs_iget can fail due to a lot of reasons
including out of memory.
So we change error handling method as below:
a) when finding no entry for the orphan inode, bug_on for catching bugs;
b) for other reasons, report it to caller.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/checkpoint.c | 31 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 2 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 4 |
3 files changed, 28 insertions, 9 deletions
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c index c3111769d382..0958c8399d8e 100644 --- a/fs/f2fs/checkpoint.c +++ b/fs/f2fs/checkpoint.c @@ -468,22 +468,34 @@ void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) __remove_ino_entry(sbi, ino, ORPHAN_INO); } -static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) +static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) { - struct inode *inode = f2fs_iget(sbi->sb, ino); - f2fs_bug_on(sbi, IS_ERR(inode)); + struct inode *inode; + + inode = f2fs_iget(sbi->sb, ino); + if (IS_ERR(inode)) { + /* + * there should be a bug that we can't find the entry + * to orphan inode. + */ + f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT); + return PTR_ERR(inode); + } + clear_nlink(inode); /* truncate all the data during iput */ iput(inode); + return 0; } -void recover_orphan_inodes(struct f2fs_sb_info *sbi) +int recover_orphan_inodes(struct f2fs_sb_info *sbi) { block_t start_blk, orphan_blocks, i, j; + int err; if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG)) - return; + return 0; set_sbi_flag(sbi, SBI_POR_DOING); @@ -499,14 +511,19 @@ void recover_orphan_inodes(struct f2fs_sb_info *sbi) 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]); - recover_orphan_inode(sbi, ino); + err = recover_orphan_inode(sbi, ino); + if (err) { + f2fs_put_page(page, 1); + clear_sbi_flag(sbi, SBI_POR_DOING); + return err; + } } f2fs_put_page(page, 1); } /* clear Orphan Flag */ clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG); clear_sbi_flag(sbi, SBI_POR_DOING); - return; + return 0; } static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk) diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 38847942edeb..cc07b1595a92 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1748,7 +1748,7 @@ int acquire_orphan_inode(struct f2fs_sb_info *); void release_orphan_inode(struct f2fs_sb_info *); void add_orphan_inode(struct f2fs_sb_info *, nid_t); void remove_orphan_inode(struct f2fs_sb_info *, nid_t); -void recover_orphan_inodes(struct f2fs_sb_info *); +int recover_orphan_inodes(struct f2fs_sb_info *); int get_valid_checkpoint(struct f2fs_sb_info *); void update_dirty_page(struct inode *, struct page *); void add_dirty_dir_inode(struct inode *); diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index a79b6b5a4eeb..4db5cd9fb4b9 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1245,7 +1245,9 @@ try_onemore: f2fs_join_shrinker(sbi); /* if there are nt orphan nodes free them */ - recover_orphan_inodes(sbi); + err = recover_orphan_inodes(sbi); + if (err) + goto free_node_inode; /* read root inode and dentry */ root = f2fs_iget(sb, F2FS_ROOT_INO(sbi)); |