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Message-ID: <3f7cccac-455c-4094-a090-e57fe87e5a86@kernel.org>
Date: Fri, 9 Jan 2026 14:52:26 +0800
From: Chao Yu <chao@...nel.org>
To: Daeho Jeong <daeho43@...il.com>, linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com
Cc: chao@...nel.org, Daeho Jeong <daehojeong@...gle.com>
Subject: Re: [f2fs-dev] [PATCH] f2fs: support non-4KB block size without
packed_ssa feature
On 1/8/2026 9:46 AM, Daeho Jeong wrote:
> From: Daeho Jeong <daehojeong@...gle.com>
>
> Currently, F2FS requires the packed_ssa feature to be enabled when
> utilizing non-4KB block sizes (e.g., 16KB). This restriction limits
> the flexibility of filesystem formatting options.
>
> This patch allows F2FS to support non-4KB block sizes even when the
> packed_ssa feature is disabled. It adjusts the SSA calculation logic to
> correctly handle summary entries in larger blocks without the packed
> layout.
Can we consider to add testcases into xfsqa to cover recent revert patch
and packed_ssa feature which changes disk layout a bit? not sure, we may
miss some corner cases in keep compatibility, e.g. mount old/new image w/
new kernel.
>
> Fixes: 7ee8bc3942f2 ("f2fs: revert summary entry count from 2048 to 512 in 16kb block support")
Cc: stable@...nel.org
> Signed-off-by: Daeho Jeong <daehojeong@...gle.com>
> ---
> fs/f2fs/f2fs.h | 56 +++++++++++++++++++--------
> fs/f2fs/gc.c | 23 +++++------
> fs/f2fs/node.c | 12 +++---
> fs/f2fs/recovery.c | 6 +--
> fs/f2fs/segment.c | 86 ++++++++++++++++++++++-------------------
> fs/f2fs/segment.h | 10 ++---
> fs/f2fs/super.c | 14 -------
> include/linux/f2fs_fs.h | 73 ++++++++++++++++++++--------------
> 8 files changed, 157 insertions(+), 123 deletions(-)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 20edbb99b814..0ceae7d83a48 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -521,13 +521,36 @@ struct fsync_inode_entry {
> #define nats_in_cursum(jnl) (le16_to_cpu((jnl)->n_nats))
> #define sits_in_cursum(jnl) (le16_to_cpu((jnl)->n_sits))
>
> -#define nat_in_journal(jnl, i) ((jnl)->nat_j.entries[i].ne)
> -#define nid_in_journal(jnl, i) ((jnl)->nat_j.entries[i].nid)
> -#define sit_in_journal(jnl, i) ((jnl)->sit_j.entries[i].se)
> -#define segno_in_journal(jnl, i) ((jnl)->sit_j.entries[i].segno)
> -
> -#define MAX_NAT_JENTRIES(jnl) (NAT_JOURNAL_ENTRIES - nats_in_cursum(jnl))
> -#define MAX_SIT_JENTRIES(jnl) (SIT_JOURNAL_ENTRIES - sits_in_cursum(jnl))
> +#define nat_in_journal(jnl, i) \
> + (((struct nat_journal_entry *)(jnl)->nat_j.entries)[i].ne)
> +#define nid_in_journal(jnl, i) \
> + (((struct nat_journal_entry *)(jnl)->nat_j.entries)[i].nid)
> +#define sit_in_journal(jnl, i) \
> + (((struct sit_journal_entry *)(jnl)->sit_j.entries)[i].se)
> +#define segno_in_journal(jnl, i) \
> + (((struct sit_journal_entry *)(jnl)->sit_j.entries)[i].segno)
> +
> +#define F2FS_SUM_BLKSIZE(sbi) \
> + (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_PACKED_SSA) ? 4096 : (sbi)->blocksize)
What about caching F2FS_SUM_BLKSIZE() as sbi->sum_blksize to avoid rundandent
calculation in lots of places?
> +#define ENTRIES_IN_SUM(sbi) (F2FS_SUM_BLKSIZE(sbi) / 8)
> +#define SUM_ENTRY_SIZE(sbi) (SUMMARY_SIZE * ENTRIES_IN_SUM(sbi))
> +#define SUM_JOURNAL_SIZE(sbi) (F2FS_SUM_BLKSIZE(sbi) - SUM_FOOTER_SIZE - \
> + SUM_ENTRY_SIZE(sbi))
> +#define NAT_JOURNAL_ENTRIES(sbi) ((SUM_JOURNAL_SIZE(sbi) - 2) / \
> + sizeof(struct nat_journal_entry))
> +#define SIT_JOURNAL_ENTRIES(sbi) ((SUM_JOURNAL_SIZE(sbi) - 2) / \
> + sizeof(struct sit_journal_entry))
Ditto?
Thanks,
> +
> +#define sum_entries(sum) ((struct f2fs_summary *)(sum))
> +#define sum_journal(sbi, sum) \
> + ((struct f2fs_journal *)((char *)(sum) + \
> + (ENTRIES_IN_SUM(sbi) * sizeof(struct f2fs_summary))))
> +#define sum_footer(sbi, sum) \
> + ((struct summary_footer *)((char *)(sum) + F2FS_SUM_BLKSIZE(sbi) - \
> + sizeof(struct summary_footer)))
> +
> +#define MAX_NAT_JENTRIES(sbi, jnl) (NAT_JOURNAL_ENTRIES(sbi) - nats_in_cursum(jnl))
> +#define MAX_SIT_JENTRIES(sbi, jnl) (SIT_JOURNAL_ENTRIES(sbi) - sits_in_cursum(jnl))
>
> static inline int update_nats_in_cursum(struct f2fs_journal *journal, int i)
> {
> @@ -545,14 +568,6 @@ static inline int update_sits_in_cursum(struct f2fs_journal *journal, int i)
> return before;
> }
>
> -static inline bool __has_cursum_space(struct f2fs_journal *journal,
> - int size, int type)
> -{
> - if (type == NAT_JOURNAL)
> - return size <= MAX_NAT_JENTRIES(journal);
> - return size <= MAX_SIT_JENTRIES(journal);
> -}
> -
> /* for inline stuff */
> #define DEF_INLINE_RESERVED_SIZE 1
> static inline int get_extra_isize(struct inode *inode);
> @@ -2813,6 +2828,14 @@ static inline block_t __start_sum_addr(struct f2fs_sb_info *sbi)
> return le32_to_cpu(F2FS_CKPT(sbi)->cp_pack_start_sum);
> }
>
> +static inline bool __has_cursum_space(struct f2fs_sb_info *sbi,
> + struct f2fs_journal *journal, int size, int type)
> +{
> + if (type == NAT_JOURNAL)
> + return size <= MAX_NAT_JENTRIES(sbi, journal);
> + return size <= MAX_SIT_JENTRIES(sbi, journal);
> +}
> +
> extern void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync);
> static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
> struct inode *inode, bool is_inode)
> @@ -3956,7 +3979,8 @@ void f2fs_wait_on_block_writeback_range(struct inode *inode, block_t blkaddr,
> block_t len);
> void f2fs_write_data_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
> void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk);
> -int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
> +int f2fs_lookup_journal_in_cursum(struct f2fs_sb_info *sbi,
> + struct f2fs_journal *journal, int type,
> unsigned int val, int alloc);
> void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc);
> int f2fs_check_and_fix_write_pointer(struct f2fs_sb_info *sbi);
> diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> index 384fa7e2085b..65c819d08807 100644
> --- a/fs/f2fs/gc.c
> +++ b/fs/f2fs/gc.c
> @@ -1769,8 +1769,8 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
>
> sanity_check_seg_type(sbi, get_seg_entry(sbi, segno)->type);
>
> - segno = rounddown(segno, SUMS_PER_BLOCK);
> - sum_blk_cnt = DIV_ROUND_UP(end_segno - segno, SUMS_PER_BLOCK);
> + segno = rounddown(segno, SUMS_PER_BLOCK(sbi));
> + sum_blk_cnt = DIV_ROUND_UP(end_segno - segno, SUMS_PER_BLOCK(sbi));
> /* readahead multi ssa blocks those have contiguous address */
> if (__is_large_section(sbi))
> f2fs_ra_meta_pages(sbi, GET_SUM_BLOCK(sbi, segno),
> @@ -1780,17 +1780,17 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
> while (segno < end_segno) {
> struct folio *sum_folio = f2fs_get_sum_folio(sbi, segno);
>
> - segno += SUMS_PER_BLOCK;
> + segno += SUMS_PER_BLOCK(sbi);
> if (IS_ERR(sum_folio)) {
> int err = PTR_ERR(sum_folio);
>
> - end_segno = segno - SUMS_PER_BLOCK;
> - segno = rounddown(start_segno, SUMS_PER_BLOCK);
> + end_segno = segno - SUMS_PER_BLOCK(sbi);
> + segno = rounddown(start_segno, SUMS_PER_BLOCK(sbi));
> while (segno < end_segno) {
> sum_folio = filemap_get_folio(META_MAPPING(sbi),
> GET_SUM_BLOCK(sbi, segno));
> folio_put_refs(sum_folio, 2);
> - segno += SUMS_PER_BLOCK;
> + segno += SUMS_PER_BLOCK(sbi);
> }
> return err;
> }
> @@ -1806,8 +1806,8 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
> /* find segment summary of victim */
> struct folio *sum_folio = filemap_get_folio(META_MAPPING(sbi),
> GET_SUM_BLOCK(sbi, segno));
> - unsigned int block_end_segno = rounddown(segno, SUMS_PER_BLOCK)
> - + SUMS_PER_BLOCK;
> + unsigned int block_end_segno = rounddown(segno, SUMS_PER_BLOCK(sbi))
> + + SUMS_PER_BLOCK(sbi);
>
> if (block_end_segno > end_segno)
> block_end_segno = end_segno;
> @@ -1833,12 +1833,13 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
> migrated >= sbi->migration_granularity)
> continue;
>
> - sum = SUM_BLK_PAGE_ADDR(sum_folio, cur_segno);
> - if (type != GET_SUM_TYPE((&sum->footer))) {
> + sum = SUM_BLK_PAGE_ADDR(sbi, sum_folio, cur_segno);
> + if (type != GET_SUM_TYPE(sum_footer(sbi, sum))) {
> f2fs_err(sbi, "Inconsistent segment (%u) type "
> "[%d, %d] in SSA and SIT",
> cur_segno, type,
> - GET_SUM_TYPE((&sum->footer)));
> + GET_SUM_TYPE(
> + sum_footer(sbi, sum)));
> f2fs_stop_checkpoint(sbi, false,
> STOP_CP_REASON_CORRUPTED_SUMMARY);
> continue;
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index 482a362f2625..f78d53ec59d4 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -606,7 +606,7 @@ int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
> goto retry;
> }
>
> - i = f2fs_lookup_journal_in_cursum(journal, NAT_JOURNAL, nid, 0);
> + i = f2fs_lookup_journal_in_cursum(sbi, journal, NAT_JOURNAL, nid, 0);
> if (i >= 0) {
> ne = nat_in_journal(journal, i);
> node_info_from_raw_nat(ni, &ne);
> @@ -2937,7 +2937,7 @@ int f2fs_restore_node_summary(struct f2fs_sb_info *sbi,
> /* scan the node segment */
> last_offset = BLKS_PER_SEG(sbi);
> addr = START_BLOCK(sbi, segno);
> - sum_entry = &sum->entries[0];
> + sum_entry = sum_entries(sum);
>
> for (i = 0; i < last_offset; i += nrpages, addr += nrpages) {
> nrpages = bio_max_segs(last_offset - i);
> @@ -3078,7 +3078,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
> * #2, flush nat entries to nat page.
> */
> if (enabled_nat_bits(sbi, cpc) ||
> - !__has_cursum_space(journal, set->entry_cnt, NAT_JOURNAL))
> + !__has_cursum_space(sbi, journal, set->entry_cnt, NAT_JOURNAL))
> to_journal = false;
>
> if (to_journal) {
> @@ -3101,7 +3101,7 @@ static int __flush_nat_entry_set(struct f2fs_sb_info *sbi,
> f2fs_bug_on(sbi, nat_get_blkaddr(ne) == NEW_ADDR);
>
> if (to_journal) {
> - offset = f2fs_lookup_journal_in_cursum(journal,
> + offset = f2fs_lookup_journal_in_cursum(sbi, journal,
> NAT_JOURNAL, nid, 1);
> f2fs_bug_on(sbi, offset < 0);
> raw_ne = &nat_in_journal(journal, offset);
> @@ -3172,7 +3172,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> * into nat entry set.
> */
> if (enabled_nat_bits(sbi, cpc) ||
> - !__has_cursum_space(journal,
> + !__has_cursum_space(sbi, journal,
> nm_i->nat_cnt[DIRTY_NAT], NAT_JOURNAL))
> remove_nats_in_journal(sbi);
>
> @@ -3183,7 +3183,7 @@ int f2fs_flush_nat_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> set_idx = setvec[found - 1]->set + 1;
> for (idx = 0; idx < found; idx++)
> __adjust_nat_entry_set(setvec[idx], &sets,
> - MAX_NAT_JENTRIES(journal));
> + MAX_NAT_JENTRIES(sbi, journal));
> }
>
> /* flush dirty nats in nat entry set */
> diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
> index c3415ebb9f50..a6bfc8e759cf 100644
> --- a/fs/f2fs/recovery.c
> +++ b/fs/f2fs/recovery.c
> @@ -514,7 +514,7 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
> struct curseg_info *curseg = CURSEG_I(sbi, i);
>
> if (curseg->segno == segno) {
> - sum = curseg->sum_blk->entries[blkoff];
> + sum = sum_entries(curseg->sum_blk)[blkoff];
> goto got_it;
> }
> }
> @@ -522,8 +522,8 @@ static int check_index_in_prev_nodes(struct f2fs_sb_info *sbi,
> sum_folio = f2fs_get_sum_folio(sbi, segno);
> if (IS_ERR(sum_folio))
> return PTR_ERR(sum_folio);
> - sum_node = SUM_BLK_PAGE_ADDR(sum_folio, segno);
> - sum = sum_node->entries[blkoff];
> + sum_node = SUM_BLK_PAGE_ADDR(sbi, sum_folio, segno);
> + sum = sum_entries(sum_node)[blkoff];
> f2fs_folio_put(sum_folio, true);
> got_it:
> /* Use the locked dnode page and inode */
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index c26424f47686..9a73b979b2e6 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -2685,12 +2685,12 @@ int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra)
> valid_sum_count += f2fs_curseg_valid_blocks(sbi, i);
> }
>
> - sum_in_page = (PAGE_SIZE - 2 * SUM_JOURNAL_SIZE -
> + sum_in_page = (F2FS_SUM_BLKSIZE(sbi) - 2 * SUM_JOURNAL_SIZE(sbi) -
> SUM_FOOTER_SIZE) / SUMMARY_SIZE;
> if (valid_sum_count <= sum_in_page)
> return 1;
> else if ((valid_sum_count - sum_in_page) <=
> - (PAGE_SIZE - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
> + (F2FS_SUM_BLKSIZE(sbi) - SUM_FOOTER_SIZE) / SUMMARY_SIZE)
> return 2;
> return 3;
> }
> @@ -2710,7 +2710,7 @@ void f2fs_update_meta_page(struct f2fs_sb_info *sbi,
> {
> struct folio *folio;
>
> - if (SUMS_PER_BLOCK == 1)
> + if (!f2fs_sb_has_packed_ssa(sbi))
> folio = f2fs_grab_meta_folio(sbi, blk_addr);
> else
> folio = f2fs_get_meta_folio_retry(sbi, blk_addr);
> @@ -2728,7 +2728,7 @@ static void write_sum_page(struct f2fs_sb_info *sbi,
> {
> struct folio *folio;
>
> - if (SUMS_PER_BLOCK == 1)
> + if (!f2fs_sb_has_packed_ssa(sbi))
> return f2fs_update_meta_page(sbi, (void *)sum_blk,
> GET_SUM_BLOCK(sbi, segno));
>
> @@ -2736,7 +2736,8 @@ static void write_sum_page(struct f2fs_sb_info *sbi,
> if (IS_ERR(folio))
> return;
>
> - memcpy(SUM_BLK_PAGE_ADDR(folio, segno), sum_blk, sizeof(*sum_blk));
> + memcpy(SUM_BLK_PAGE_ADDR(sbi, folio, segno), sum_blk,
> + F2FS_SUM_BLKSIZE(sbi));
> folio_mark_dirty(folio);
> f2fs_folio_put(folio, true);
> }
> @@ -2755,11 +2756,11 @@ static void write_current_sum_page(struct f2fs_sb_info *sbi,
> mutex_lock(&curseg->curseg_mutex);
>
> down_read(&curseg->journal_rwsem);
> - memcpy(&dst->journal, curseg->journal, SUM_JOURNAL_SIZE);
> + memcpy(sum_journal(sbi, dst), curseg->journal, SUM_JOURNAL_SIZE(sbi));
> up_read(&curseg->journal_rwsem);
>
> - memcpy(dst->entries, src->entries, SUM_ENTRY_SIZE);
> - memcpy(&dst->footer, &src->footer, SUM_FOOTER_SIZE);
> + memcpy(sum_entries(dst), sum_entries(src), SUM_ENTRY_SIZE(sbi));
> + memcpy(sum_footer(sbi, dst), sum_footer(sbi, src), SUM_FOOTER_SIZE);
>
> mutex_unlock(&curseg->curseg_mutex);
>
> @@ -2932,7 +2933,7 @@ static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
> curseg->next_blkoff = 0;
> curseg->next_segno = NULL_SEGNO;
>
> - sum_footer = &(curseg->sum_blk->footer);
> + sum_footer = sum_footer(sbi, curseg->sum_blk);
> memset(sum_footer, 0, sizeof(struct summary_footer));
>
> sanity_check_seg_type(sbi, seg_type);
> @@ -3078,11 +3079,11 @@ static int change_curseg(struct f2fs_sb_info *sbi, int type)
> sum_folio = f2fs_get_sum_folio(sbi, new_segno);
> if (IS_ERR(sum_folio)) {
> /* GC won't be able to use stale summary pages by cp_error */
> - memset(curseg->sum_blk, 0, SUM_ENTRY_SIZE);
> + memset(curseg->sum_blk, 0, SUM_ENTRY_SIZE(sbi));
> return PTR_ERR(sum_folio);
> }
> - sum_node = SUM_BLK_PAGE_ADDR(sum_folio, new_segno);
> - memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE);
> + sum_node = SUM_BLK_PAGE_ADDR(sbi, sum_folio, new_segno);
> + memcpy(curseg->sum_blk, sum_node, SUM_ENTRY_SIZE(sbi));
> f2fs_folio_put(sum_folio, true);
> return 0;
> }
> @@ -3814,7 +3815,7 @@ int f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct folio *folio,
>
> f2fs_wait_discard_bio(sbi, *new_blkaddr);
>
> - curseg->sum_blk->entries[curseg->next_blkoff] = *sum;
> + sum_entries(curseg->sum_blk)[curseg->next_blkoff] = *sum;
> if (curseg->alloc_type == SSR) {
> curseg->next_blkoff = f2fs_find_next_ssr_block(sbi, curseg);
> } else {
> @@ -4183,7 +4184,7 @@ void f2fs_do_replace_block(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
> }
>
> curseg->next_blkoff = GET_BLKOFF_FROM_SEG0(sbi, new_blkaddr);
> - curseg->sum_blk->entries[curseg->next_blkoff] = *sum;
> + sum_entries(curseg->sum_blk)[curseg->next_blkoff] = *sum;
>
> if (!recover_curseg || recover_newaddr) {
> if (!from_gc)
> @@ -4303,12 +4304,12 @@ static int read_compacted_summaries(struct f2fs_sb_info *sbi)
>
> /* Step 1: restore nat cache */
> seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
> - memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE);
> + memcpy(seg_i->journal, kaddr, SUM_JOURNAL_SIZE(sbi));
>
> /* Step 2: restore sit cache */
> seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
> - memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE, SUM_JOURNAL_SIZE);
> - offset = 2 * SUM_JOURNAL_SIZE;
> + memcpy(seg_i->journal, kaddr + SUM_JOURNAL_SIZE(sbi), SUM_JOURNAL_SIZE(sbi));
> + offset = 2 * SUM_JOURNAL_SIZE(sbi);
>
> /* Step 3: restore summary entries */
> for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
> @@ -4330,9 +4331,9 @@ static int read_compacted_summaries(struct f2fs_sb_info *sbi)
> struct f2fs_summary *s;
>
> s = (struct f2fs_summary *)(kaddr + offset);
> - seg_i->sum_blk->entries[j] = *s;
> + sum_entries(seg_i->sum_blk)[j] = *s;
> offset += SUMMARY_SIZE;
> - if (offset + SUMMARY_SIZE <= PAGE_SIZE -
> + if (offset + SUMMARY_SIZE <= F2FS_SUM_BLKSIZE(sbi) -
> SUM_FOOTER_SIZE)
> continue;
>
> @@ -4388,7 +4389,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
>
> if (IS_NODESEG(type)) {
> if (__exist_node_summaries(sbi)) {
> - struct f2fs_summary *ns = &sum->entries[0];
> + struct f2fs_summary *ns = sum_entries(sum);
> int i;
>
> for (i = 0; i < BLKS_PER_SEG(sbi); i++, ns++) {
> @@ -4408,11 +4409,13 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
>
> /* update journal info */
> down_write(&curseg->journal_rwsem);
> - memcpy(curseg->journal, &sum->journal, SUM_JOURNAL_SIZE);
> + memcpy(curseg->journal, sum_journal(sbi, sum), SUM_JOURNAL_SIZE(sbi));
> up_write(&curseg->journal_rwsem);
>
> - memcpy(curseg->sum_blk->entries, sum->entries, SUM_ENTRY_SIZE);
> - memcpy(&curseg->sum_blk->footer, &sum->footer, SUM_FOOTER_SIZE);
> + memcpy(sum_entries(curseg->sum_blk), sum_entries(sum),
> + SUM_ENTRY_SIZE(sbi));
> + memcpy(sum_footer(sbi, curseg->sum_blk), sum_footer(sbi, sum),
> + SUM_FOOTER_SIZE);
> curseg->next_segno = segno;
> reset_curseg(sbi, type, 0);
> curseg->alloc_type = ckpt->alloc_type[type];
> @@ -4456,8 +4459,8 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
> }
>
> /* sanity check for summary blocks */
> - if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
> - sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) {
> + if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES(sbi) ||
> + sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES(sbi)) {
> f2fs_err(sbi, "invalid journal entries nats %u sits %u",
> nats_in_cursum(nat_j), sits_in_cursum(sit_j));
> return -EINVAL;
> @@ -4481,13 +4484,13 @@ static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
>
> /* Step 1: write nat cache */
> seg_i = CURSEG_I(sbi, CURSEG_HOT_DATA);
> - memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE);
> - written_size += SUM_JOURNAL_SIZE;
> + memcpy(kaddr, seg_i->journal, SUM_JOURNAL_SIZE(sbi));
> + written_size += SUM_JOURNAL_SIZE(sbi);
>
> /* Step 2: write sit cache */
> seg_i = CURSEG_I(sbi, CURSEG_COLD_DATA);
> - memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE);
> - written_size += SUM_JOURNAL_SIZE;
> + memcpy(kaddr + written_size, seg_i->journal, SUM_JOURNAL_SIZE(sbi));
> + written_size += SUM_JOURNAL_SIZE(sbi);
>
> /* Step 3: write summary entries */
> for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_DATA; i++) {
> @@ -4500,7 +4503,7 @@ static void write_compacted_summaries(struct f2fs_sb_info *sbi, block_t blkaddr)
> written_size = 0;
> }
> summary = (struct f2fs_summary *)(kaddr + written_size);
> - *summary = seg_i->sum_blk->entries[j];
> + *summary = sum_entries(seg_i->sum_blk)[j];
> written_size += SUMMARY_SIZE;
>
> if (written_size + SUMMARY_SIZE <= PAGE_SIZE -
> @@ -4545,8 +4548,9 @@ void f2fs_write_node_summaries(struct f2fs_sb_info *sbi, block_t start_blk)
> write_normal_summaries(sbi, start_blk, CURSEG_HOT_NODE);
> }
>
> -int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
> - unsigned int val, int alloc)
> +int f2fs_lookup_journal_in_cursum(struct f2fs_sb_info *sbi,
> + struct f2fs_journal *journal, int type,
> + unsigned int val, int alloc)
> {
> int i;
>
> @@ -4555,13 +4559,13 @@ int f2fs_lookup_journal_in_cursum(struct f2fs_journal *journal, int type,
> if (le32_to_cpu(nid_in_journal(journal, i)) == val)
> return i;
> }
> - if (alloc && __has_cursum_space(journal, 1, NAT_JOURNAL))
> + if (alloc && __has_cursum_space(sbi, journal, 1, NAT_JOURNAL))
> return update_nats_in_cursum(journal, 1);
> } else if (type == SIT_JOURNAL) {
> for (i = 0; i < sits_in_cursum(journal); i++)
> if (le32_to_cpu(segno_in_journal(journal, i)) == val)
> return i;
> - if (alloc && __has_cursum_space(journal, 1, SIT_JOURNAL))
> + if (alloc && __has_cursum_space(sbi, journal, 1, SIT_JOURNAL))
> return update_sits_in_cursum(journal, 1);
> }
> return -1;
> @@ -4709,8 +4713,8 @@ void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> * entries, remove all entries from journal and add and account
> * them in sit entry set.
> */
> - if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL) ||
> - !to_journal)
> + if (!__has_cursum_space(sbi, journal,
> + sit_i->dirty_sentries, SIT_JOURNAL) || !to_journal)
> remove_sits_in_journal(sbi);
>
> /*
> @@ -4727,7 +4731,8 @@ void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> unsigned int segno = start_segno;
>
> if (to_journal &&
> - !__has_cursum_space(journal, ses->entry_cnt, SIT_JOURNAL))
> + !__has_cursum_space(sbi, journal, ses->entry_cnt,
> + SIT_JOURNAL))
> to_journal = false;
>
> if (to_journal) {
> @@ -4755,7 +4760,7 @@ void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> }
>
> if (to_journal) {
> - offset = f2fs_lookup_journal_in_cursum(journal,
> + offset = f2fs_lookup_journal_in_cursum(sbi, journal,
> SIT_JOURNAL, segno, 1);
> f2fs_bug_on(sbi, offset < 0);
> segno_in_journal(journal, offset) =
> @@ -4962,12 +4967,13 @@ static int build_curseg(struct f2fs_sb_info *sbi)
>
> for (i = 0; i < NO_CHECK_TYPE; i++) {
> mutex_init(&array[i].curseg_mutex);
> - array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL);
> + array[i].sum_blk = f2fs_kzalloc(sbi, F2FS_SUM_BLKSIZE(sbi),
> + GFP_KERNEL);
> if (!array[i].sum_blk)
> return -ENOMEM;
> init_rwsem(&array[i].journal_rwsem);
> array[i].journal = f2fs_kzalloc(sbi,
> - sizeof(struct f2fs_journal), GFP_KERNEL);
> + SUM_JOURNAL_SIZE(sbi), GFP_KERNEL);
> if (!array[i].journal)
> return -ENOMEM;
> array[i].seg_type = log_type_to_seg_type(i);
> diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
> index 07dcbcbeb7c6..8b38f3693b1a 100644
> --- a/fs/f2fs/segment.h
> +++ b/fs/f2fs/segment.h
> @@ -90,12 +90,12 @@ static inline void sanity_check_seg_type(struct f2fs_sb_info *sbi,
> #define GET_ZONE_FROM_SEG(sbi, segno) \
> GET_ZONE_FROM_SEC(sbi, GET_SEC_FROM_SEG(sbi, segno))
>
> -#define SUMS_PER_BLOCK (F2FS_BLKSIZE / F2FS_SUM_BLKSIZE)
> +#define SUMS_PER_BLOCK(sbi) ((sbi)->blocksize / F2FS_SUM_BLKSIZE(sbi))
> #define GET_SUM_BLOCK(sbi, segno) \
> - (SM_I(sbi)->ssa_blkaddr + (segno / SUMS_PER_BLOCK))
> -#define GET_SUM_BLKOFF(segno) (segno % SUMS_PER_BLOCK)
> -#define SUM_BLK_PAGE_ADDR(folio, segno) \
> - (folio_address(folio) + GET_SUM_BLKOFF(segno) * F2FS_SUM_BLKSIZE)
> + (SM_I(sbi)->ssa_blkaddr + (segno / SUMS_PER_BLOCK(sbi)))
> +#define GET_SUM_BLKOFF(sbi, segno) (segno % SUMS_PER_BLOCK(sbi))
> +#define SUM_BLK_PAGE_ADDR(sbi, folio, segno) \
> + (folio_address(folio) + GET_SUM_BLKOFF(sbi, segno) * F2FS_SUM_BLKSIZE(sbi))
>
> #define GET_SUM_TYPE(footer) ((footer)->entry_type)
> #define SET_SUM_TYPE(footer, type) ((footer)->entry_type = (type))
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index c4c225e09dc4..253a23a7b67d 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -4080,20 +4080,6 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
> if (sanity_check_area_boundary(sbi, folio, index))
> return -EFSCORRUPTED;
>
> - /*
> - * Check for legacy summary layout on 16KB+ block devices.
> - * Modern f2fs-tools packs multiple 4KB summary areas into one block,
> - * whereas legacy versions used one block per summary, leading
> - * to a much larger SSA.
> - */
> - if (SUMS_PER_BLOCK > 1 &&
> - !(__F2FS_HAS_FEATURE(raw_super, F2FS_FEATURE_PACKED_SSA))) {
> - f2fs_info(sbi, "Error: Device formatted with a legacy version. "
> - "Please reformat with a tool supporting the packed ssa "
> - "feature for block sizes larger than 4kb.");
> - return -EOPNOTSUPP;
> - }
> -
> return 0;
> }
>
> diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
> index a7880787cad3..394f7af3a102 100644
> --- a/include/linux/f2fs_fs.h
> +++ b/include/linux/f2fs_fs.h
> @@ -17,7 +17,6 @@
> #define F2FS_LOG_SECTORS_PER_BLOCK (PAGE_SHIFT - 9) /* log number for sector/blk */
> #define F2FS_BLKSIZE PAGE_SIZE /* support only block == page */
> #define F2FS_BLKSIZE_BITS PAGE_SHIFT /* bits for F2FS_BLKSIZE */
> -#define F2FS_SUM_BLKSIZE 4096 /* only support 4096 byte sum block */
> #define F2FS_MAX_EXTENSION 64 /* # of extension entries */
> #define F2FS_EXTENSION_LEN 8 /* max size of extension */
>
> @@ -442,10 +441,8 @@ struct f2fs_sit_block {
> * from node's page's beginning to get a data block address.
> * ex) data_blkaddr = (block_t)(nodepage_start_address + ofs_in_node)
> */
> -#define ENTRIES_IN_SUM (F2FS_SUM_BLKSIZE / 8)
> #define SUMMARY_SIZE (7) /* sizeof(struct f2fs_summary) */
> #define SUM_FOOTER_SIZE (5) /* sizeof(struct summary_footer) */
> -#define SUM_ENTRY_SIZE (SUMMARY_SIZE * ENTRIES_IN_SUM)
>
> /* a summary entry for a block in a segment */
> struct f2fs_summary {
> @@ -468,22 +465,6 @@ struct summary_footer {
> __le32 check_sum; /* summary checksum */
> } __packed;
>
> -#define SUM_JOURNAL_SIZE (F2FS_SUM_BLKSIZE - SUM_FOOTER_SIZE -\
> - SUM_ENTRY_SIZE)
> -#define NAT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\
> - sizeof(struct nat_journal_entry))
> -#define NAT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\
> - sizeof(struct nat_journal_entry))
> -#define SIT_JOURNAL_ENTRIES ((SUM_JOURNAL_SIZE - 2) /\
> - sizeof(struct sit_journal_entry))
> -#define SIT_JOURNAL_RESERVED ((SUM_JOURNAL_SIZE - 2) %\
> - sizeof(struct sit_journal_entry))
> -
> -/* Reserved area should make size of f2fs_extra_info equals to
> - * that of nat_journal and sit_journal.
> - */
> -#define EXTRA_INFO_RESERVED (SUM_JOURNAL_SIZE - 2 - 8)
> -
> /*
> * frequently updated NAT/SIT entries can be stored in the spare area in
> * summary blocks
> @@ -498,9 +479,16 @@ struct nat_journal_entry {
> struct f2fs_nat_entry ne;
> } __packed;
>
> +/*
> + * The nat_journal structure is a placeholder whose actual size varies depending
> + * on the use of packed_ssa. Therefore, it must always be accessed only through
> + * specific sets of macros, and size calculations should use size-related macros
> + * instead of sizeof().
> + * Relevant macros: NAT_JOURNAL_ENTRIES, nat_in_journal, nid_in_journal,
> + * MAX_NAT_JENTRIES.
> + */
> struct nat_journal {
> - struct nat_journal_entry entries[NAT_JOURNAL_ENTRIES];
> - __u8 reserved[NAT_JOURNAL_RESERVED];
> + struct nat_journal_entry entries[0];
> } __packed;
>
> struct sit_journal_entry {
> @@ -508,14 +496,21 @@ struct sit_journal_entry {
> struct f2fs_sit_entry se;
> } __packed;
>
> +/*
> + * The sit_journal structure is a placeholder whose actual size varies depending
> + * on the use of packed_ssa. Therefore, it must always be accessed only through
> + * specific sets of macros, and size calculations should use size-related macros
> + * instead of sizeof().
> + * Relevant macros: SIT_JOURNAL_ENTRIES, sit_in_journal, segno_in_journal,
> + * MAX_SIT_JENTRIES.
> + */
> struct sit_journal {
> - struct sit_journal_entry entries[SIT_JOURNAL_ENTRIES];
> - __u8 reserved[SIT_JOURNAL_RESERVED];
> + struct sit_journal_entry entries[0];
> } __packed;
>
> struct f2fs_extra_info {
> __le64 kbytes_written;
> - __u8 reserved[EXTRA_INFO_RESERVED];
> + __u8 reserved[];
> } __packed;
>
> struct f2fs_journal {
> @@ -531,11 +526,33 @@ struct f2fs_journal {
> };
> } __packed;
>
> -/* Block-sized summary block structure */
> +/*
> + * Block-sized summary block structure
> + *
> + * The f2fs_summary_block structure is a placeholder whose actual size varies
> + * depending on the use of packed_ssa. Therefore, it must always be accessed
> + * only through specific sets of macros, and size calculations should use
> + * size-related macros instead of sizeof().
> + * Relevant macros: F2FS_SUM_BLKSIZE, ENTRIES_IN_SUM, SUM_ENTRY_SIZE,
> + * sum_entries, sum_journal, sum_footer.
> + *
> + * Summary Block Layout
> + *
> + * +-----------------------+ <--- Block Start
> + * | struct f2fs_summary |
> + * | entries[0] |
> + * | ... |
> + * | entries[N-1] |
> + * +-----------------------+
> + * | struct f2fs_journal |
> + * +-----------------------+
> + * | struct summary_footer |
> + * +-----------------------+ <--- Block End
> + */
> struct f2fs_summary_block {
> - struct f2fs_summary entries[ENTRIES_IN_SUM];
> - struct f2fs_journal journal;
> - struct summary_footer footer;
> + struct f2fs_summary entries[0];
> + // struct f2fs_journal journal;
> + // struct summary_footer footer;
> } __packed;
>
> /*
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