On 2018/3/5 15:07, Yunlei He wrote:
> This patch check blkaddr more accuratly before issue a
> write or read bio.
>
> Signed-off-by: Yunlei He <heyun...@huawei.com>
> ---
> fs/f2fs/checkpoint.c | 2 ++
> fs/f2fs/data.c | 5 +++--
> fs/f2fs/f2fs.h | 1 +
> fs/f2fs/segment.h | 29 +++++++++++++++++++++++++----
> 4 files changed, 31 insertions(+), 6 deletions(-)
>
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index 5b2db75..bf77946 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -68,6 +68,7 @@ static struct page *__get_meta_page(struct f2fs_sb_info
> *sbi, pgoff_t index,
> .old_blkaddr = index,
> .new_blkaddr = index,
> .encrypted_page = NULL,
> + .is_meta = is_meta,
> };
>
> if (unlikely(!is_meta))
> @@ -162,6 +163,7 @@ int ra_meta_pages(struct f2fs_sb_info *sbi, block_t
> start, int nrpages,
> .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
> .encrypted_page = NULL,
> .in_list = false,
> + .is_meta = (type != META_POR),
> };
> struct blk_plug plug;
>
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 6c3c978..de036e8 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -383,6 +383,7 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
> struct page *page = fio->encrypted_page ?
> fio->encrypted_page : fio->page;
>
> + verify_block_addr(fio, fio->new_blkaddr);
> trace_f2fs_submit_page_bio(page, fio);
> f2fs_trace_ios(fio, 0);
>
> @@ -428,8 +429,8 @@ int f2fs_submit_page_write(struct f2fs_io_info *fio)
> }
>
> if (fio->old_blkaddr != NEW_ADDR)
> - verify_block_addr(sbi, fio->old_blkaddr);
> - verify_block_addr(sbi, fio->new_blkaddr);
> + verify_block_addr(fio, fio->old_blkaddr);
> + verify_block_addr(fio, fio->new_blkaddr);
>
> bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index f6dc706..842adea 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -980,6 +980,7 @@ struct f2fs_io_info {
> bool submitted; /* indicate IO submission */
> int need_lock; /* indicate we need to lock cp_rwsem */
> bool in_list; /* indicate fio is in io_list */
> + bool is_meta; /* indicate borrow meta inode mapping or not */
> enum iostat_type io_type; /* io type */
> struct writeback_control *io_wbc; /* writeback control */
> };
> diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
> index dbb774aa..dabe400 100644
> --- a/fs/f2fs/segment.h
> +++ b/fs/f2fs/segment.h
> @@ -632,10 +632,31 @@ static inline void check_seg_range(struct f2fs_sb_info
> *sbi, unsigned int segno)
> f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
> }
>
> -static inline void verify_block_addr(struct f2fs_sb_info *sbi, block_t
> blk_addr)
> -{
> - BUG_ON(blk_addr < SEG0_BLKADDR(sbi)
> - || blk_addr >= MAX_BLKADDR(sbi));
> +static inline void verify_block_addr(struct f2fs_io_info *fio, block_t
> blk_addr)
> +{
> + struct f2fs_sb_info *sbi = fio->sbi;
> + enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
> + struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
> + block_t seg0_blkaddr = le32_to_cpu(raw_super->segment0_blkaddr);
> + block_t main_blkaddr = le32_to_cpu(raw_super->main_blkaddr);
> + block_t max_blkaddr = (le32_to_cpu(raw_super->segment_count)
> + << sbi->log_blocks_per_seg) + seg0_blkaddr;
> +
> + if (is_read_io(fio->op)) {
> + if (btype == META && fio->is_meta)
> + BUG_ON(blk_addr < seg0_blkaddr
> + || blk_addr >= main_blkaddr);
> + else
> + BUG_ON(blk_addr < main_blkaddr
> + || blk_addr >= max_blkaddr);
> + } else {
> + if (btype == META)
> + BUG_ON(blk_addr < seg0_blkaddr
> + || blk_addr >= main_blkaddr);
> + else
> + BUG_ON(blk_addr < main_blkaddr
> + || blk_addr >= max_blkaddr);
> + }
Advertising
How about:
if (btype == META && (!is_read_io || fio->is_meta))
check_meta_area_range;
else
check_main_area_range;
Thanks,
> }
>
> /*
>
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