Re: [PATCH v3] f2fs: rebuild nat_bits during umount

From: Chao Yu
Date: Mon Mar 04 2019 - 01:27:14 EST

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In reply to: Jaegeuk Kim: "Re: [PATCH v3] f2fs: rebuild nat_bits during umount"
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On 2019/3/2 1:55, Jaegeuk Kim wrote:
> On 02/28, Chao Yu wrote:
>> Ping,
>>
>> Could you please try this new version?
>
> It's in the queue, and I'll test this after the next pull request.

Okay. :)

Thanks,

>
>>
>> On 2019/2/17 6:26, Chao Yu wrote:
>>> From: Chao Yu <yuchao0@xxxxxxxxxx>
>>>
>>> If all free_nat_bitmap are available, we can rebuild nat_bits from
>>> free_nat_bitmap entirely during umount, let's make another chance
>>> to reenable nat_bits for image.
>>>
>>> Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
>>> ---
>>> v3:
>>> - fix to remove nat journal during umount.
>>> fs/f2fs/checkpoint.c | 23 +++++++++----
>>> fs/f2fs/f2fs.h | 29 ++--------------
>>> fs/f2fs/node.c | 82 +++++++++++++++++++++++++++++++++++++-------
>>> 3 files changed, 89 insertions(+), 45 deletions(-)
>>>
>>> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
>>> index 10a3ada28715..b4c9de4e6eb0 100644
>>> --- a/fs/f2fs/checkpoint.c
>>> +++ b/fs/f2fs/checkpoint.c
>>> @@ -1225,12 +1225,22 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
>>> unsigned long flags;
>>>
>>> - spin_lock_irqsave(&sbi->cp_lock, flags);
>>> + if (cpc->reason & CP_UMOUNT) {
>>> + if (le32_to_cpu(ckpt->cp_pack_total_block_count) >
>>> + sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks) {
>>> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>> + "Disable nat_bits due to no space");
>>> + } else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
>>> + f2fs_nat_bitmap_enabled(sbi)) {
>>> + f2fs_enable_nat_bits(sbi);
>>> + set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>> + "Rebuild and enable nat_bits");
>>> + }
>>> + }
>>>
>>> - if ((cpc->reason & CP_UMOUNT) &&
>>> - le32_to_cpu(ckpt->cp_pack_total_block_count) >
>>> - sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
>>> - disable_nat_bits(sbi, false);
>>> + spin_lock_irqsave(&sbi->cp_lock, flags);
>>>
>>> if (cpc->reason & CP_TRIMMED)
>>> __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
>>> @@ -1395,7 +1405,8 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> start_blk = __start_cp_next_addr(sbi);
>>>
>>> /* write nat bits */
>>> - if (enabled_nat_bits(sbi, cpc)) {
>>> + if ((cpc->reason & CP_UMOUNT) &&
>>> + is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
>>> __u64 cp_ver = cur_cp_version(ckpt);
>>> block_t blk;
>>>
>>> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
>>> index c0d30810ef8a..a543354fc6bf 100644
>>> --- a/fs/f2fs/f2fs.h
>>> +++ b/fs/f2fs/f2fs.h
>>> @@ -1615,33 +1615,6 @@ static inline void clear_ckpt_flags(struct f2fs_sb_info *sbi, unsigned int f)
>>> spin_unlock_irqrestore(&sbi->cp_lock, flags);
>>> }
>>>
>>> -static inline void disable_nat_bits(struct f2fs_sb_info *sbi, bool lock)
>>> -{
>>> - unsigned long flags;
>>> -
>>> - /*
>>> - * In order to re-enable nat_bits we need to call fsck.f2fs by
>>> - * set_sbi_flag(sbi, SBI_NEED_FSCK). But it may give huge cost,
>>> - * so let's rely on regular fsck or unclean shutdown.
>>> - */
>>> -
>>> - if (lock)
>>> - spin_lock_irqsave(&sbi->cp_lock, flags);
>>> - __clear_ckpt_flags(F2FS_CKPT(sbi), CP_NAT_BITS_FLAG);
>>> - kvfree(NM_I(sbi)->nat_bits);
>>> - NM_I(sbi)->nat_bits = NULL;
>>> - if (lock)
>>> - spin_unlock_irqrestore(&sbi->cp_lock, flags);
>>> -}
>>> -
>>> -static inline bool enabled_nat_bits(struct f2fs_sb_info *sbi,
>>> - struct cp_control *cpc)
>>> -{
>>> - bool set = is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> -
>>> - return (cpc) ? (cpc->reason & CP_UMOUNT) && set : set;
>>> -}
>>> -
>>> static inline void f2fs_lock_op(struct f2fs_sb_info *sbi)
>>> {
>>> down_read(&sbi->cp_rwsem);
>>> @@ -2970,6 +2943,7 @@ int f2fs_truncate_inode_blocks(struct inode *inode, pgoff_t from);
>>> int f2fs_truncate_xattr_node(struct inode *inode);
>>> int f2fs_wait_on_node_pages_writeback(struct f2fs_sb_info *sbi,
>>> unsigned int seq_id);
>>> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi);
>>> int f2fs_remove_inode_page(struct inode *inode);
>>> struct page *f2fs_new_inode_page(struct inode *inode);
>>> struct page *f2fs_new_node_page(struct dnode_of_data *dn, unsigned int ofs);
>>> @@ -2993,6 +2967,7 @@ 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,
>>> unsigned int segno, struct f2fs_summary_block *sum);
>>> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi);
>>> int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
>>> int f2fs_build_node_manager(struct f2fs_sb_info *sbi);
>>> void f2fs_destroy_node_manager(struct f2fs_sb_info *sbi);
>>> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
>>> index f6ff84e29749..e364c6a84f3c 100644
>>> --- a/fs/f2fs/node.c
>>> +++ b/fs/f2fs/node.c
>>> @@ -2038,6 +2038,24 @@ static void __move_free_nid(struct f2fs_sb_info *sbi, struct free_nid *i,
>>> }
>>> }
>>>
>>> +bool f2fs_nat_bitmap_enabled(struct f2fs_sb_info *sbi)
>>> +{
>>> + struct f2fs_nm_info *nm_i = NM_I(sbi);
>>> + unsigned int i;
>>> + bool ret = true;
>>> +
>>> + down_read(&nm_i->nat_tree_lock);
>>> + for (i = 0; i < nm_i->nat_blocks; i++) {
>>> + if (!test_bit_le(i, nm_i->nat_block_bitmap)) {
>>> + ret = false;
>>> + break;
>>> + }
>>> + }
>>> + up_read(&nm_i->nat_tree_lock);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> static void update_free_nid_bitmap(struct f2fs_sb_info *sbi, nid_t nid,
>>> bool set, bool build)
>>> {
>>> @@ -2698,7 +2716,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
>>> int valid = 0;
>>> int i = 0;
>>>
>>> - if (!enabled_nat_bits(sbi, NULL))
>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>> return;
>>>
>>> if (nat_index == 0) {
>>> @@ -2722,6 +2740,43 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
>>> __clear_bit_le(nat_index, nm_i->full_nat_bits);
>>> }
>>>
>>> +void f2fs_enable_nat_bits(struct f2fs_sb_info *sbi)
>>> +{
>>> + struct f2fs_nm_info *nm_i = NM_I(sbi);
>>> + int nat_ofs;
>>> +
>>> + down_read(&nm_i->nat_tree_lock);
>>> +
>>> + for (nat_ofs = 0; nat_ofs < nm_i->nat_blocks; nat_ofs++) {
>>> + int valid = 0, nid_ofs = 0;
>>> +
>>> + if (nat_ofs == 0) {
>>> + valid = 1;
>>> + nid_ofs = 1;
>>> + }
>>> +
>>> + for (; nid_ofs < NAT_ENTRY_PER_BLOCK; nid_ofs++) {
>>> + if (!test_bit_le(nid_ofs,
>>> + nm_i->free_nid_bitmap[nat_ofs]))
>>> + valid++;
>>> + }
>>> +
>>> + if (valid == 0) {
>>> + __set_bit_le(nat_ofs, nm_i->empty_nat_bits);
>>> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
>>> + continue;
>>> + }
>>> +
>>> + __clear_bit_le(nat_ofs, nm_i->empty_nat_bits);
>>> + if (valid == NAT_ENTRY_PER_BLOCK)
>>> + __set_bit_le(nat_ofs, nm_i->full_nat_bits);
>>> + else
>>> + __clear_bit_le(nat_ofs, nm_i->full_nat_bits);
>>> + }
>>> +
>>> + up_read(&nm_i->nat_tree_lock);
>>> +}
>>> +
>>> static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
>>> struct nat_entry_set *set, struct cp_control *cpc)
>>> {
>>> @@ -2738,7 +2793,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
>>> * #1, flush nat entries to journal in current hot data summary block.
>>> * #2, flush nat entries to nat page.
>>> */
>>> - if (enabled_nat_bits(sbi, cpc) ||
>>> + if ((cpc->reason & CP_UMOUNT) ||
>>> !__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
>>> to_journal = false;
>>>
>>> @@ -2813,7 +2868,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> int err = 0;
>>>
>>> /* during unmount, let's flush nat_bits before checking dirty_nat_cnt */
>>> - if (enabled_nat_bits(sbi, cpc)) {
>>> + if (cpc->reason & CP_UMOUNT) {
>>> down_write(&nm_i->nat_tree_lock);
>>> remove_nats_in_journal(sbi);
>>> up_write(&nm_i->nat_tree_lock);
>>> @@ -2829,7 +2884,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
>>> * entries, remove all entries from journal and merge them
>>> * into nat entry set.
>>> */
>>> - if (enabled_nat_bits(sbi, cpc) ||
>>> + if ((cpc->reason & CP_UMOUNT) ||
>>> !__has_cursum_space(journal, nm_i->dirty_nat_cnt, NAT_JOURNAL))
>>> remove_nats_in_journal(sbi);
>>>
>>> @@ -2864,15 +2919,18 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
>>> __u64 cp_ver = cur_cp_version(ckpt);
>>> block_t nat_bits_addr;
>>>
>>> - if (!enabled_nat_bits(sbi, NULL))
>>> - return 0;
>>> -
>>> nm_i->nat_bits_blocks = F2FS_BLK_ALIGN((nat_bits_bytes << 1) + 8);
>>> nm_i->nat_bits = f2fs_kzalloc(sbi,
>>> nm_i->nat_bits_blocks << F2FS_BLKSIZE_BITS, GFP_KERNEL);
>>> if (!nm_i->nat_bits)
>>> return -ENOMEM;
>>>
>>> + nm_i->full_nat_bits = nm_i->nat_bits + 8;
>>> + nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
>>> +
>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>> + return 0;
>>> +
>>> 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++) {
>>> @@ -2889,13 +2947,13 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
>>>
>>> cp_ver |= (cur_cp_crc(ckpt) << 32);
>>> if (cpu_to_le64(cp_ver) != *(__le64 *)nm_i->nat_bits) {
>>> - disable_nat_bits(sbi, true);
>>> + clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
>>> + f2fs_msg(sbi->sb, KERN_NOTICE,
>>> + "Disable nat_bits due to incorrect cp_ver (%llu, %llu)",
>>> + cp_ver, le64_to_cpu(*(__le64 *)nm_i->nat_bits));
>>> return 0;
>>> }
>>>
>>> - nm_i->full_nat_bits = nm_i->nat_bits + 8;
>>> - nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
>>> -
>>> f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
>>> return 0;
>>> }
>>> @@ -2906,7 +2964,7 @@ static inline void load_free_nid_bitmap(struct f2fs_sb_info *sbi)
>>> unsigned int i = 0;
>>> nid_t nid, last_nid;
>>>
>>> - if (!enabled_nat_bits(sbi, NULL))
>>> + if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG))
>>> return;
>>>
>>> for (i = 0; i < nm_i->nat_blocks; i++) {
>>>
>
> .
>

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In reply to: Jaegeuk Kim: "Re: [PATCH v3] f2fs: rebuild nat_bits during umount"
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