On 03/05, Chao Yu wrote:
> This patch turns off nat_bits feature by default in Android,
> for other scenario, keep it on and keep an eye on it.
>
> Signed-off-by: Chao Yu <c...@kernel.org>
> ---
> fsck/mount.c | 3 ++-
> include/f2fs_fs.h | 6 ++++++
> mkfs/f2fs_format.c | 3 ++-
> mkfs/f2fs_format_main.c | 1 +
> 4 files changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/fsck/mount.c b/fsck/mount.c
> index a189ba7..2f4c631 100644
> --- a/fsck/mount.c
> +++ b/fsck/mount.c
> @@ -1708,7 +1708,8 @@ u32 update_nat_bits_flags(struct f2fs_super_block *sb,
> nat_bits_bytes = get_sb(segment_count_nat) << 5;
> nat_bits_blocks = F2FS_BYTES_TO_BLK((nat_bits_bytes << 1) + 8 +
> F2FS_BLKSIZE - 1);
> - if (get_cp(cp_pack_total_block_count) <=
> + if (!(c.disabled_feature & F2FS_FEATURE_NAT_BITS) &&
We need to set c.diabled_feature |= F2FS_FEATURE_NAT_BITS in fsck and others?
> + get_cp(cp_pack_total_block_count) <=
> (1 << get_sb(log_blocks_per_seg)) - nat_bits_blocks)
> flags |= CP_NAT_BITS_FLAG;
> else
> diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
> index 0cb9228..bb40adc 100644
> --- a/include/f2fs_fs.h
> +++ b/include/f2fs_fs.h
> @@ -1471,6 +1471,11 @@ enum {
>
> #define MAX_CACHE_SUMS 8
>
> +/* feature list in Android */
> +enum {
> + F2FS_FEATURE_NAT_BITS = 0x0001,
> +};
> +
> struct f2fs_configuration {
> uint32_t conf_reserved_sections;
> uint32_t reserved_segments;
> @@ -1537,6 +1542,7 @@ struct f2fs_configuration {
> int large_nat_bitmap;
> int fix_chksum; /* fix old cp.chksum position */
> unsigned int feature; /* defined features */
> + unsigned int disabled_feature; /* disabled feature, used for Android
> only */
> unsigned int quota_bits; /* quota bits */
> time_t fixed_time;
> int roll_forward;
> diff --git a/mkfs/f2fs_format.c b/mkfs/f2fs_format.c
> index 6635eed..c28ebb0 100644
> --- a/mkfs/f2fs_format.c
> +++ b/mkfs/f2fs_format.c
> @@ -893,7 +893,8 @@ static int f2fs_write_check_point_pack(void)
> /* cp page (2), data summaries (1), node summaries (3) */
> set_cp(cp_pack_total_block_count, 6 + get_sb(cp_payload));
> flags = CP_UMOUNT_FLAG | CP_COMPACT_SUM_FLAG;
> - if (get_cp(cp_pack_total_block_count) <=
> + if (!(c.disabled_feature & F2FS_FEATURE_NAT_BITS) &&
> + get_cp(cp_pack_total_block_count) <=
> (1 << get_sb(log_blocks_per_seg)) - nat_bits_blocks)
> flags |= CP_NAT_BITS_FLAG;
>
> diff --git a/mkfs/f2fs_format_main.c b/mkfs/f2fs_format_main.c
> index 9407f5b..5b4569d 100644
> --- a/mkfs/f2fs_format_main.c
> +++ b/mkfs/f2fs_format_main.c
> @@ -143,6 +143,7 @@ static void add_default_options(void)
> force_overwrite = 1;
> c.wanted_sector_size = F2FS_BLKSIZE;
> c.root_uid = c.root_gid = 0;
> + c.disabled_feature |= F2FS_FEATURE_NAT_BITS;
>
> /* RO doesn't need any other features */
> if (c.feature & F2FS_FEATURE_RO)
> --
> 2.48.1
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