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Date: Wed, 7 Feb 2024 14:27:54 -0800
From: Daeho Jeong <daeho43@...il.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 3/3] f2fs: kill zone-capacity support

On Tue, Feb 6, 2024 at 6:43 PM Jaegeuk Kim <jaegeuk@...nel.org> wrote:
>
> On 02/06, Jaegeuk Kim wrote:
> > Since we don't see any user, let's kill.
> >
> > Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> > ---
> >  Documentation/ABI/testing/sysfs-fs-f2fs |  6 --
> >  fs/f2fs/debug.c                         |  7 +-
> >  fs/f2fs/f2fs.h                          |  5 --
> >  fs/f2fs/file.c                          |  6 +-
> >  fs/f2fs/gc.c                            | 33 +++------
> >  fs/f2fs/gc.h                            | 26 -------
> >  fs/f2fs/segment.c                       | 93 +++----------------------
> >  fs/f2fs/segment.h                       | 41 ++++-------
> >  fs/f2fs/super.c                         | 16 +----
> >  fs/f2fs/sysfs.c                         |  6 --
> >  10 files changed, 43 insertions(+), 196 deletions(-)
> >
> > diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs
> > index 48c135e24eb5..dff8c87d87dd 100644
> > --- a/Documentation/ABI/testing/sysfs-fs-f2fs
> > +++ b/Documentation/ABI/testing/sysfs-fs-f2fs
> > @@ -628,12 +628,6 @@ Contact: "Jaegeuk Kim" <jaegeuk@...nel.org>
> >  Description: Controls max # of node block writes to be used for roll forward
> >               recovery. This can limit the roll forward recovery time.
> >
> > -What:                /sys/fs/f2fs/<disk>/unusable_blocks_per_sec
> > -Date:                June 2022
> > -Contact:     "Jaegeuk Kim" <jaegeuk@...nel.org>
> > -Description: Shows the number of unusable blocks in a section which was defined by
> > -             the zone capacity reported by underlying zoned device.
> > -
> >  What:                /sys/fs/f2fs/<disk>/current_atomic_write
> >  Date:                July 2022
> >  Contact:     "Daeho Jeong" <daehojeong@...gle.com>
> > diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
> > index 0d02224b99b7..6617195bd27e 100644
> > --- a/fs/f2fs/debug.c
> > +++ b/fs/f2fs/debug.c
> > @@ -32,21 +32,20 @@ static struct dentry *f2fs_debugfs_root;
> >  void f2fs_update_sit_info(struct f2fs_sb_info *sbi)
> >  {
> >       struct f2fs_stat_info *si = F2FS_STAT(sbi);
> > -     unsigned long long blks_per_sec, hblks_per_sec, total_vblocks;
> > +     unsigned long long hblks_per_sec, total_vblocks;
> >       unsigned long long bimodal, dist;
> >       unsigned int segno, vblocks;
> >       int ndirty = 0;
> >
> >       bimodal = 0;
> >       total_vblocks = 0;
> > -     blks_per_sec = CAP_BLKS_PER_SEC(sbi);
> > -     hblks_per_sec = blks_per_sec / 2;
> > +     hblks_per_sec = BLKS_PER_SEC(sbi) / 2;
> >       for (segno = 0; segno < MAIN_SEGS(sbi); segno += SEGS_PER_SEC(sbi)) {
> >               vblocks = get_valid_blocks(sbi, segno, true);
> >               dist = abs(vblocks - hblks_per_sec);
> >               bimodal += dist * dist;
> >
> > -             if (vblocks > 0 && vblocks < blks_per_sec) {
> > +             if (vblocks > 0 && vblocks < BLKS_PER_SEC(sbi)) {
> >                       total_vblocks += vblocks;
> >                       ndirty++;
> >               }
> > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > index 9a9e858083af..34d718301392 100644
> > --- a/fs/f2fs/f2fs.h
> > +++ b/fs/f2fs/f2fs.h
> > @@ -1618,7 +1618,6 @@ struct f2fs_sb_info {
> >       unsigned int meta_ino_num;              /* meta inode number*/
> >       unsigned int log_blocks_per_seg;        /* log2 blocks per segment */
> >       unsigned int blocks_per_seg;            /* blocks per segment */
> > -     unsigned int unusable_blocks_per_sec;   /* unusable blocks per section */
> >       unsigned int segs_per_sec;              /* segments per section */
> >       unsigned int secs_per_zone;             /* sections per zone */
> >       unsigned int total_sections;            /* total section count */
> > @@ -3743,10 +3742,6 @@ void f2fs_destroy_segment_manager(struct f2fs_sb_info *sbi);
> >  int __init f2fs_create_segment_manager_caches(void);
> >  void f2fs_destroy_segment_manager_caches(void);
> >  int f2fs_rw_hint_to_seg_type(enum rw_hint hint);
> > -unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi,
> > -                     unsigned int segno);
> > -unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi,
> > -                     unsigned int segno);
> >
> >  #define DEF_FRAGMENT_SIZE    4
> >  #define MIN_FRAGMENT_SIZE    1
> > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > index b0be576b2090..2c13b340c8a0 100644
> > --- a/fs/f2fs/file.c
> > +++ b/fs/f2fs/file.c
> > @@ -1717,7 +1717,7 @@ static int f2fs_expand_inode_data(struct inode *inode, loff_t offset,
> >               return 0;
> >
> >       if (f2fs_is_pinned_file(inode)) {
> > -             block_t sec_blks = CAP_BLKS_PER_SEC(sbi);
> > +             block_t sec_blks = BLKS_PER_SEC(sbi);
> >               block_t sec_len = roundup(map.m_len, sec_blks);
> >
> >               map.m_len = sec_blks;
> > @@ -2525,7 +2525,7 @@ static int __f2fs_ioc_gc_range(struct file *filp, struct f2fs_gc_range *range)
> >                       ret = -EAGAIN;
> >               goto out;
> >       }
> > -     range->start += CAP_BLKS_PER_SEC(sbi);
> > +     range->start += BLKS_PER_SEC(sbi);
> >       if (range->start <= end)
> >               goto do_more;
> >  out:
> > @@ -2654,7 +2654,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
> >               goto out;
> >       }
> >
> > -     sec_num = DIV_ROUND_UP(total, CAP_BLKS_PER_SEC(sbi));
> > +     sec_num = DIV_ROUND_UP(total, BLKS_PER_SEC(sbi));
> >
> >       /*
> >        * make sure there are enough free section for LFS allocation, this can
> > diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> > index d61a60c1c844..0a1a50b68df8 100644
> > --- a/fs/f2fs/gc.c
> > +++ b/fs/f2fs/gc.c
> > @@ -340,14 +340,13 @@ static unsigned int get_cb_cost(struct f2fs_sb_info *sbi, unsigned int segno)
> >       unsigned char age = 0;
> >       unsigned char u;
> >       unsigned int i;
> > -     unsigned int usable_segs_per_sec = f2fs_usable_segs_in_sec(sbi, segno);
> >
> > -     for (i = 0; i < usable_segs_per_sec; i++)
> > +     for (i = 0; i < SEGS_PER_SEC(sbi); i++)
> >               mtime += get_seg_entry(sbi, start + i)->mtime;
> >       vblocks = get_valid_blocks(sbi, segno, true);
> >
> > -     mtime = div_u64(mtime, usable_segs_per_sec);
> > -     vblocks = div_u64(vblocks, usable_segs_per_sec);
> > +     mtime = div_u64(mtime, SEGS_PER_SEC(sbi));
> > +     vblocks = div_u64(vblocks, SEGS_PER_SEC(sbi));
> >
> >       u = (vblocks * 100) >> sbi->log_blocks_per_seg;
> >
> > @@ -530,7 +529,6 @@ static void atgc_lookup_victim(struct f2fs_sb_info *sbi,
> >       unsigned long long age, u, accu;
> >       unsigned long long max_mtime = sit_i->dirty_max_mtime;
> >       unsigned long long min_mtime = sit_i->dirty_min_mtime;
> > -     unsigned int sec_blocks = CAP_BLKS_PER_SEC(sbi);
> >       unsigned int vblocks;
> >       unsigned int dirty_threshold = max(am->max_candidate_count,
> >                                       am->candidate_ratio *
> > @@ -560,13 +558,13 @@ static void atgc_lookup_victim(struct f2fs_sb_info *sbi,
> >
> >       /* age = 10000 * x% * 60 */
> >       age = div64_u64(accu * (max_mtime - ve->mtime), total_time) *
> > -                                                             age_weight;
> > +                                                     age_weight;
> >
> >       vblocks = get_valid_blocks(sbi, ve->segno, true);
> > -     f2fs_bug_on(sbi, !vblocks || vblocks == sec_blocks);
> > +     f2fs_bug_on(sbi, !vblocks || vblocks == BLKS_PER_SEC(sbi));
> >
> >       /* u = 10000 * x% * 40 */
> > -     u = div64_u64(accu * (sec_blocks - vblocks), sec_blocks) *
> > +     u = div64_u64(accu * (BLKS_PER_SEC(sbi) - vblocks), BLKS_PER_SEC(sbi)) *
> >                                                       (100 - age_weight);
> >
> >       f2fs_bug_on(sbi, age + u >= UINT_MAX);
> > @@ -1003,7 +1001,6 @@ static int gc_node_segment(struct f2fs_sb_info *sbi,
> >       int phase = 0;
> >       bool fggc = (gc_type == FG_GC);
> >       int submitted = 0;
> > -     unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
> >
> >       start_addr = START_BLOCK(sbi, segno);
> >
> > @@ -1013,7 +1010,7 @@ static int gc_node_segment(struct f2fs_sb_info *sbi,
> >       if (fggc && phase == 2)
> >               atomic_inc(&sbi->wb_sync_req[NODE]);
> >
> > -     for (off = 0; off < usable_blks_in_seg; off++, entry++) {
> > +     for (off = 0; off < BLKS_PER_SEG(sbi); off++, entry++) {
> >               nid_t nid = le32_to_cpu(entry->nid);
> >               struct page *node_page;
> >               struct node_info ni;
> > @@ -1498,14 +1495,13 @@ static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
> >       int off;
> >       int phase = 0;
> >       int submitted = 0;
> > -     unsigned int usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
> >
> >       start_addr = START_BLOCK(sbi, segno);
> >
> >  next_step:
> >       entry = sum;
> >
> > -     for (off = 0; off < usable_blks_in_seg; off++, entry++) {
> > +     for (off = 0; off < BLKS_PER_SEG(sbi); off++, entry++) {
> >               struct page *data_page;
> >               struct inode *inode;
> >               struct node_info dni; /* dnode info for the data */
> > @@ -1520,7 +1516,7 @@ static int gc_data_segment(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
> >                */
> >               if ((gc_type == BG_GC && has_not_enough_free_secs(sbi, 0, 0)) ||
> >                       (!force_migrate && get_valid_blocks(sbi, segno, true) ==
> > -                                                     CAP_BLKS_PER_SEC(sbi)))
> > +                                                     BLKS_PER_SEC(sbi)))
> >                       return submitted;
> >
> >               if (check_valid_map(sbi, segno, off) == 0)
> > @@ -1680,15 +1676,6 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
> >       if (__is_large_section(sbi))
> >               end_segno = rounddown(end_segno, SEGS_PER_SEC(sbi));
> >
> > -     /*
> > -      * zone-capacity can be less than zone-size in zoned devices,
> > -      * resulting in less than expected usable segments in the zone,
> > -      * calculate the end segno in the zone which can be garbage collected
> > -      */
> > -     if (f2fs_sb_has_blkzoned(sbi))
> > -             end_segno -= SEGS_PER_SEC(sbi) -
> > -                                     f2fs_usable_segs_in_sec(sbi, segno);
> > -
> >       sanity_check_seg_type(sbi, get_seg_entry(sbi, segno)->type);
> >
> >       /* readahead multi ssa blocks those have contiguous address */
> > @@ -1862,7 +1849,7 @@ int f2fs_gc(struct f2fs_sb_info *sbi, struct f2fs_gc_control *gc_control)
> >
> >       total_freed += seg_freed;
> >
> > -     if (seg_freed == f2fs_usable_segs_in_sec(sbi, segno)) {
> > +     if (seg_freed == SEGS_PER_SEC(sbi)) {
> >               sec_freed++;
> >               total_sec_freed++;
> >       }
> > diff --git a/fs/f2fs/gc.h b/fs/f2fs/gc.h
> > index 28a00942802c..e4a75aa4160f 100644
> > --- a/fs/f2fs/gc.h
> > +++ b/fs/f2fs/gc.h
> > @@ -68,34 +68,8 @@ struct victim_entry {
> >   * inline functions
> >   */
> >
> > -/*
> > - * On a Zoned device zone-capacity can be less than zone-size and if
> > - * zone-capacity is not aligned to f2fs segment size(2MB), then the segment
> > - * starting just before zone-capacity has some blocks spanning across the
> > - * zone-capacity, these blocks are not usable.
> > - * Such spanning segments can be in free list so calculate the sum of usable
> > - * blocks in currently free segments including normal and spanning segments.
> > - */
> > -static inline block_t free_segs_blk_count_zoned(struct f2fs_sb_info *sbi)
> > -{
> > -     block_t free_seg_blks = 0;
> > -     struct free_segmap_info *free_i = FREE_I(sbi);
> > -     int j;
> > -
> > -     spin_lock(&free_i->segmap_lock);
> > -     for (j = 0; j < MAIN_SEGS(sbi); j++)
> > -             if (!test_bit(j, free_i->free_segmap))
> > -                     free_seg_blks += f2fs_usable_blks_in_seg(sbi, j);
> > -     spin_unlock(&free_i->segmap_lock);
> > -
> > -     return free_seg_blks;
> > -}
> > -
> >  static inline block_t free_segs_blk_count(struct f2fs_sb_info *sbi)
> >  {
> > -     if (f2fs_sb_has_blkzoned(sbi))
> > -             return free_segs_blk_count_zoned(sbi);
> > -
> >       return free_segments(sbi) << sbi->log_blocks_per_seg;
> >  }
> >
> > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > index 8d330664b925..1013276ad12a 100644
> > --- a/fs/f2fs/segment.c
> > +++ b/fs/f2fs/segment.c
> > @@ -769,7 +769,7 @@ static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
> >                               get_valid_blocks(sbi, segno, true);
> >
> >                       f2fs_bug_on(sbi, unlikely(!valid_blocks ||
> > -                                     valid_blocks == CAP_BLKS_PER_SEC(sbi)));
> > +                                     valid_blocks == BLKS_PER_SEC(sbi)));
> >
> >                       if (!IS_CURSEC(sbi, secno))
> >                               set_bit(secno, dirty_i->dirty_secmap);
> > @@ -805,7 +805,7 @@ static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
> >                       unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
> >
> >                       if (!valid_blocks ||
> > -                                     valid_blocks == CAP_BLKS_PER_SEC(sbi)) {
> > +                                     valid_blocks == BLKS_PER_SEC(sbi)) {
> >                               clear_bit(secno, dirty_i->dirty_secmap);
> >                               return;
> >                       }
> > @@ -825,22 +825,20 @@ static void locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno)
> >  {
> >       struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
> >       unsigned short valid_blocks, ckpt_valid_blocks;
> > -     unsigned int usable_blocks;
> >
> >       if (segno == NULL_SEGNO || IS_CURSEG(sbi, segno))
> >               return;
> >
> > -     usable_blocks = f2fs_usable_blks_in_seg(sbi, segno);
> >       mutex_lock(&dirty_i->seglist_lock);
> >
> >       valid_blocks = get_valid_blocks(sbi, segno, false);
> >       ckpt_valid_blocks = get_ckpt_valid_blocks(sbi, segno, false);
> >
> >       if (valid_blocks == 0 && (!is_sbi_flag_set(sbi, SBI_CP_DISABLED) ||
> > -             ckpt_valid_blocks == usable_blocks)) {
> > +             ckpt_valid_blocks == BLKS_PER_SEG(sbi))) {
> >               __locate_dirty_segment(sbi, segno, PRE);
> >               __remove_dirty_segment(sbi, segno, DIRTY);
> > -     } else if (valid_blocks < usable_blocks) {
> > +     } else if (valid_blocks < BLKS_PER_SEG(sbi)) {
> >               __locate_dirty_segment(sbi, segno, DIRTY);
> >       } else {
> >               /* Recovery routine with SSR needs this */
> > @@ -882,12 +880,7 @@ block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi)
> >       mutex_lock(&dirty_i->seglist_lock);
> >       for_each_set_bit(segno, dirty_i->dirty_segmap[DIRTY], MAIN_SEGS(sbi)) {
> >               se = get_seg_entry(sbi, segno);
> > -             if (IS_NODESEG(se->type))
> > -                     holes[NODE] += f2fs_usable_blks_in_seg(sbi, segno) -
> > -                                                     se->valid_blocks;
> > -             else
> > -                     holes[DATA] += f2fs_usable_blks_in_seg(sbi, segno) -
> > -                                                     se->valid_blocks;
> > +             holes[SE_PAGETYPE(se)] += BLKS_PER_SEG(sbi) - se->valid_blocks;
> >       }
> >       mutex_unlock(&dirty_i->seglist_lock);
> >
> > @@ -2406,8 +2399,7 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
> >       new_vblocks = se->valid_blocks + del;
> >       offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
> >
> > -     f2fs_bug_on(sbi, (new_vblocks < 0 ||
> > -                     (new_vblocks > f2fs_usable_blks_in_seg(sbi, segno))));
> > +     f2fs_bug_on(sbi, new_vblocks < 0 || new_vblocks > BLKS_PER_SEG(sbi));
> >
> >       se->valid_blocks = new_vblocks;
> >
> > @@ -3449,7 +3441,7 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> >               if (F2FS_OPTION(sbi).fs_mode == FS_MODE_FRAGMENT_BLK)
> >                       f2fs_randomize_chunk(sbi, curseg);
> >       }
> > -     if (curseg->next_blkoff >= f2fs_usable_blks_in_seg(sbi, curseg->segno))
> > +     if (curseg->next_blkoff >= BLKS_PER_SEG(sbi))
> >               segment_full = true;
> >       stat_inc_block_count(sbi, curseg);
> >
> > @@ -4687,8 +4679,6 @@ static void init_free_segmap(struct f2fs_sb_info *sbi)
> >       struct seg_entry *sentry;
> >
> >       for (start = 0; start < MAIN_SEGS(sbi); start++) {
> > -             if (f2fs_usable_blks_in_seg(sbi, start) == 0)
> > -                     continue;
> >               sentry = get_seg_entry(sbi, start);
> >               if (!sentry->valid_blocks)
> >                       __set_free(sbi, start);
> > @@ -4710,7 +4700,7 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi)
> >       struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
> >       struct free_segmap_info *free_i = FREE_I(sbi);
> >       unsigned int segno = 0, offset = 0, secno;
> > -     block_t valid_blocks, usable_blks_in_seg;
> > +     block_t valid_blocks;
> >
> >       while (1) {
> >               /* find dirty segment based on free segmap */
> > @@ -4719,10 +4709,9 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi)
> >                       break;
> >               offset = segno + 1;
> >               valid_blocks = get_valid_blocks(sbi, segno, false);
> > -             usable_blks_in_seg = f2fs_usable_blks_in_seg(sbi, segno);
> > -             if (valid_blocks == usable_blks_in_seg || !valid_blocks)
> > +             if (valid_blocks == BLKS_PER_SEG(sbi) || !valid_blocks)
> >                       continue;
> > -             if (valid_blocks > usable_blks_in_seg) {
> > +             if (valid_blocks > BLKS_PER_SEG(sbi)) {
> >                       f2fs_bug_on(sbi, 1);
> >                       continue;
> >               }
> > @@ -4739,7 +4728,7 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi)
> >               valid_blocks = get_valid_blocks(sbi, segno, true);
> >               secno = GET_SEC_FROM_SEG(sbi, segno);
> >
> > -             if (!valid_blocks || valid_blocks == CAP_BLKS_PER_SEC(sbi))
> > +             if (!valid_blocks || valid_blocks == BLKS_PER_SEC(sbi))
> >                       continue;
> >               if (IS_CURSEC(sbi, secno))
> >                       continue;
> > @@ -5097,42 +5086,6 @@ int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
> >
> >       return 0;
> >  }
> > -
> > -/*
> > - * Return the number of usable blocks in a segment. The number of blocks
> > - * returned is always equal to the number of blocks in a segment for
> > - * segments fully contained within a sequential zone capacity or a
> > - * conventional zone. For segments partially contained in a sequential
> > - * zone capacity, the number of usable blocks up to the zone capacity
> > - * is returned. 0 is returned in all other cases.
> > - */
> > -static inline unsigned int f2fs_usable_zone_blks_in_seg(
> > -                     struct f2fs_sb_info *sbi, unsigned int segno)
> > -{
> > -     block_t seg_start, sec_start_blkaddr, sec_cap_blkaddr;
> > -     unsigned int secno;
> > -
> > -     if (!sbi->unusable_blocks_per_sec)
> > -             return BLKS_PER_SEG(sbi);
> > -
> > -     secno = GET_SEC_FROM_SEG(sbi, segno);
> > -     seg_start = START_BLOCK(sbi, segno);
> > -     sec_start_blkaddr = START_BLOCK(sbi, GET_SEG_FROM_SEC(sbi, secno));
> > -     sec_cap_blkaddr = sec_start_blkaddr + CAP_BLKS_PER_SEC(sbi);
> > -
> > -     /*
> > -      * If segment starts before zone capacity and spans beyond
> > -      * zone capacity, then usable blocks are from seg start to
> > -      * zone capacity. If the segment starts after the zone capacity,
> > -      * then there are no usable blocks.
> > -      */
> > -     if (seg_start >= sec_cap_blkaddr)
> > -             return 0;
> > -     if (seg_start + BLKS_PER_SEG(sbi) > sec_cap_blkaddr)
> > -             return sec_cap_blkaddr - seg_start;
> > -
> > -     return BLKS_PER_SEG(sbi);
> > -}
> >  #else
> >  int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
> >  {
> > @@ -5143,31 +5096,7 @@ int f2fs_check_write_pointer(struct f2fs_sb_info *sbi)
> >  {
> >       return 0;
> >  }
> > -
> > -static inline unsigned int f2fs_usable_zone_blks_in_seg(struct f2fs_sb_info *sbi,
> > -                                                     unsigned int segno)
> > -{
> > -     return 0;
> > -}
> > -
> >  #endif
> > -unsigned int f2fs_usable_blks_in_seg(struct f2fs_sb_info *sbi,
> > -                                     unsigned int segno)
> > -{
> > -     if (f2fs_sb_has_blkzoned(sbi))
> > -             return f2fs_usable_zone_blks_in_seg(sbi, segno);
> > -
> > -     return BLKS_PER_SEG(sbi);
> > -}
> > -
> > -unsigned int f2fs_usable_segs_in_sec(struct f2fs_sb_info *sbi,
> > -                                     unsigned int segno)
> > -{
> > -     if (f2fs_sb_has_blkzoned(sbi))
> > -             return CAP_SEGS_PER_SEC(sbi);
> > -
> > -     return SEGS_PER_SEC(sbi);
> > -}
> >
> >  /*
> >   * Update min, max modified time for cost-benefit GC algorithm
> > diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
> > index 96cec83012f1..b725ae1a7043 100644
> > --- a/fs/f2fs/segment.h
> > +++ b/fs/f2fs/segment.h
> > @@ -99,12 +99,6 @@ static inline void sanity_check_seg_type(struct f2fs_sb_info *sbi,
> >       ((!__is_valid_data_blkaddr(blk_addr)) ?                 \
> >       NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi),                 \
> >               GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
> > -#define CAP_BLKS_PER_SEC(sbi)                                        \
> > -     ((sbi)->segs_per_sec * (sbi)->blocks_per_seg -          \
> > -      (sbi)->unusable_blocks_per_sec)
> > -#define CAP_SEGS_PER_SEC(sbi)                                        \
> > -     ((sbi)->segs_per_sec - ((sbi)->unusable_blocks_per_sec >>\
> > -     (sbi)->log_blocks_per_seg))
> >  #define GET_SEC_FROM_SEG(sbi, segno)                         \
> >       (((segno) == -1) ? -1 : (segno) / (sbi)->segs_per_sec)
> >  #define GET_SEG_FROM_SEC(sbi, secno)                         \
> > @@ -440,7 +434,6 @@ static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno)
> >       unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
> >       unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno);
> >       unsigned int next;
> > -     unsigned int usable_segs = f2fs_usable_segs_in_sec(sbi, segno);
> >
> >       spin_lock(&free_i->segmap_lock);
> >       clear_bit(segno, free_i->free_segmap);
> > @@ -448,7 +441,7 @@ static inline void __set_free(struct f2fs_sb_info *sbi, unsigned int segno)
> >
> >       next = find_next_bit(free_i->free_segmap,
> >                       start_segno + SEGS_PER_SEC(sbi), start_segno);
> > -     if (next >= start_segno + usable_segs) {
> > +     if (next >= start_segno + SEGS_PER_SEC(sbi)) {
> >               clear_bit(secno, free_i->free_secmap);
> >               free_i->free_sections++;
> >       }
> > @@ -474,7 +467,6 @@ static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
> >       unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
> >       unsigned int start_segno = GET_SEG_FROM_SEC(sbi, secno);
> >       unsigned int next;
> > -     unsigned int usable_segs = f2fs_usable_segs_in_sec(sbi, segno);
> >
> >       spin_lock(&free_i->segmap_lock);
> >       if (test_and_clear_bit(segno, free_i->free_segmap)) {
> > @@ -484,7 +476,7 @@ static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
> >                       goto skip_free;
> >               next = find_next_bit(free_i->free_segmap,
> >                               start_segno + SEGS_PER_SEC(sbi), start_segno);
> > -             if (next >= start_segno + usable_segs) {
> > +             if (next >= start_segno + SEGS_PER_SEC(sbi)) {
> >                       if (test_and_clear_bit(secno, free_i->free_secmap))
> >                               free_i->free_sections++;
> >               }
> > @@ -577,16 +569,15 @@ static inline bool has_curseg_enough_space(struct f2fs_sb_info *sbi,
> >       /* check current node segment */
> >       for (i = CURSEG_HOT_NODE; i <= CURSEG_COLD_NODE; i++) {
> >               segno = CURSEG_I(sbi, i)->segno;
> > -             left_blocks = f2fs_usable_blks_in_seg(sbi, segno) -
> > +             left_blocks = BLKS_PER_SEG(sbi) -
> >                               get_seg_entry(sbi, segno)->ckpt_valid_blocks;
> > -
> >               if (node_blocks > left_blocks)
> >                       return false;
> >       }
> >
> >       /* check current data segment */
> >       segno = CURSEG_I(sbi, CURSEG_HOT_DATA)->segno;
> > -     left_blocks = f2fs_usable_blks_in_seg(sbi, segno) -
> > +     left_blocks = BLKS_PER_SEG(sbi) -
> >                       get_seg_entry(sbi, segno)->ckpt_valid_blocks;
> >       if (dent_blocks > left_blocks)
> >               return false;
> > @@ -604,10 +595,10 @@ static inline void __get_secs_required(struct f2fs_sb_info *sbi,
> >                                       get_pages(sbi, F2FS_DIRTY_DENTS) +
> >                                       get_pages(sbi, F2FS_DIRTY_IMETA);
> >       unsigned int total_dent_blocks = get_pages(sbi, F2FS_DIRTY_DENTS);
> > -     unsigned int node_secs = total_node_blocks / CAP_BLKS_PER_SEC(sbi);
> > -     unsigned int dent_secs = total_dent_blocks / CAP_BLKS_PER_SEC(sbi);
> > -     unsigned int node_blocks = total_node_blocks % CAP_BLKS_PER_SEC(sbi);
> > -     unsigned int dent_blocks = total_dent_blocks % CAP_BLKS_PER_SEC(sbi);
> > +     unsigned int node_secs = total_node_blocks / BLKS_PER_SEC(sbi);
> > +     unsigned int dent_secs = total_dent_blocks / BLKS_PER_SEC(sbi);
> > +     unsigned int node_blocks = total_node_blocks % BLKS_PER_SEC(sbi);
> > +     unsigned int dent_blocks = total_dent_blocks % BLKS_PER_SEC(sbi);
> >
> >       if (lower_p)
> >               *lower_p = node_secs + dent_secs;
> > @@ -766,22 +757,21 @@ static inline int check_block_count(struct f2fs_sb_info *sbi,
> >       bool is_valid  = test_bit_le(0, raw_sit->valid_map) ? true : false;
> >       int valid_blocks = 0;
> >       int cur_pos = 0, next_pos;
> > -     unsigned int usable_blks_per_seg = f2fs_usable_blks_in_seg(sbi, segno);
> >
> >       /* check bitmap with valid block count */
> >       do {
> >               if (is_valid) {
> >                       next_pos = find_next_zero_bit_le(&raw_sit->valid_map,
> > -                                     usable_blks_per_seg,
> > +                                     BLKS_PER_SEG(sbi),
> >                                       cur_pos);
> >                       valid_blocks += next_pos - cur_pos;
> >               } else
> >                       next_pos = find_next_bit_le(&raw_sit->valid_map,
> > -                                     usable_blks_per_seg,
> > +                                     BLKS_PER_SEG(sbi),
> >                                       cur_pos);
> >               cur_pos = next_pos;
> >               is_valid = !is_valid;
> > -     } while (cur_pos < usable_blks_per_seg);
> > +     } while (cur_pos < BLKS_PER_SEG(sbi));
> >
> >       if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) {
> >               f2fs_err(sbi, "Mismatch valid blocks %d vs. %d",
> > @@ -791,14 +781,9 @@ static inline int check_block_count(struct f2fs_sb_info *sbi,
> >               return -EFSCORRUPTED;
> >       }
> >
> > -     if (usable_blks_per_seg < BLKS_PER_SEG(sbi))
> > -             f2fs_bug_on(sbi, find_next_bit_le(&raw_sit->valid_map,
> > -                             BLKS_PER_SEG(sbi),
> > -                             usable_blks_per_seg) != BLKS_PER_SEG(sbi));
> > -
> >       /* check segment usage, and check boundary of a given segment number */
> > -     if (unlikely(GET_SIT_VBLOCKS(raw_sit) > usable_blks_per_seg
> > -                                     || !valid_main_segno(sbi, segno))) {
> > +     if (unlikely(GET_SIT_VBLOCKS(raw_sit) > BLKS_PER_SEG(sbi) ||
> > +                             !valid_main_segno(sbi, segno))) {
> >               f2fs_err(sbi, "Wrong valid blocks %d or segno %u",
> >                        GET_SIT_VBLOCKS(raw_sit), segno);
> >               set_sbi_flag(sbi, SBI_NEED_FSCK);
> > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> > index c0688c124aa7..e75b8651fe54 100644
> > --- a/fs/f2fs/super.c
> > +++ b/fs/f2fs/super.c
> > @@ -3836,20 +3836,10 @@ struct f2fs_report_zones_args {
> >  static int f2fs_report_zone_cb(struct blk_zone *zone, unsigned int idx,
> >                             void *data)
> >  {
> > -     struct f2fs_report_zones_args *rz_args = data;
> > -     block_t unusable_blocks = (zone->len - zone->capacity) >>
> > -                                     F2FS_LOG_SECTORS_PER_BLOCK;
> > +     if (zone->capacity) {
>
> Had to fix this by
>         if (zone->len != zone->capacity) {
>
> > +             struct f2fs_report_zones_args *rz_args = data;
> >
> > -     if (zone->type == BLK_ZONE_TYPE_CONVENTIONAL)
> > -             return 0;
> > -
> > -     set_bit(idx, rz_args->dev->blkz_seq);

Can we remove this part? I think we still might need this one.

> > -     if (!rz_args->sbi->unusable_blocks_per_sec) {
> > -             rz_args->sbi->unusable_blocks_per_sec = unusable_blocks;
> > -             return 0;
> > -     }
> > -     if (rz_args->sbi->unusable_blocks_per_sec != unusable_blocks) {
> > -             f2fs_err(rz_args->sbi, "F2FS supports single zone capacity\n");
> > +             f2fs_err(rz_args->sbi, "F2FS does not support zone capacity.\n");
> >               return -EINVAL;
> >       }
> >       return 0;
> > diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
> > index 906d2af2d849..2689cc9c3bf8 100644
> > --- a/fs/f2fs/sysfs.c
> > +++ b/fs/f2fs/sysfs.c
> > @@ -1018,9 +1018,6 @@ F2FS_SBI_GENERAL_RW_ATTR(revoked_atomic_block);
> >  F2FS_SBI_GENERAL_RW_ATTR(hot_data_age_threshold);
> >  F2FS_SBI_GENERAL_RW_ATTR(warm_data_age_threshold);
> >  F2FS_SBI_GENERAL_RW_ATTR(last_age_weight);
> > -#ifdef CONFIG_BLK_DEV_ZONED
> > -F2FS_SBI_GENERAL_RO_ATTR(unusable_blocks_per_sec);
> > -#endif
> >
> >  /* STAT_INFO ATTR */
> >  #ifdef CONFIG_F2FS_STAT_FS
> > @@ -1172,9 +1169,6 @@ static struct attribute *f2fs_attrs[] = {
> >       ATTR_LIST(moved_blocks_background),
> >       ATTR_LIST(avg_vblocks),
> >  #endif
> > -#ifdef CONFIG_BLK_DEV_ZONED
> > -     ATTR_LIST(unusable_blocks_per_sec),
> > -#endif
> >  #ifdef CONFIG_F2FS_FS_COMPRESSION
> >       ATTR_LIST(compr_written_block),
> >       ATTR_LIST(compr_saved_block),
> > --
> > 2.43.0.594.gd9cf4e227d-goog
>
>
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