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Message-ID: <CAL3q7H7WPE+26v1uCKa5C=BwcGpUN3OjnaPUkexPGD=mpJbkSA@mail.gmail.com>
Date: Wed, 30 Apr 2025 09:05:53 +0100
From: Filipe Manana <fdmanana@...nel.org>
To: Daniel Vacek <neelx@...e.com>
Cc: Chris Mason <clm@...com>, Josef Bacik <josef@...icpanda.com>, David Sterba <dsterba@...e.com>,
linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] btrfs: remove extent buffer's redundant `len` member field
On Tue, Apr 29, 2025 at 4:19 PM Daniel Vacek <neelx@...e.com> wrote:
>
> Even super block nowadays uses nodesize for eb->len. This is since commits
>
> 551561c34663 ("btrfs: don't pass nodesize to __alloc_extent_buffer()")
> da17066c4047 ("btrfs: pull node/sector/stripe sizes out of root and into fs_info")
> ce3e69847e3e ("btrfs: sink parameter len to alloc_extent_buffer")
> a83fffb75d09 ("btrfs: sink blocksize parameter to btrfs_find_create_tree_block")
>
> With these the eb->len is not really useful anymore. Let's use the nodesize
> directly where applicable.
>
> Signed-off-by: Daniel Vacek <neelx@...e.com>
> ---
> [RFC]
> * Shall the eb_len() helper better be called eb_nodesize()? Or even rather
> opencoded and not used at all?
>
> fs/btrfs/accessors.c | 4 +--
> fs/btrfs/disk-io.c | 11 ++++---
> fs/btrfs/extent-tree.c | 28 +++++++++--------
> fs/btrfs/extent_io.c | 54 ++++++++++++++------------------
> fs/btrfs/extent_io.h | 11 +++++--
> fs/btrfs/ioctl.c | 2 +-
> fs/btrfs/relocation.c | 2 +-
> fs/btrfs/subpage.c | 8 ++---
> fs/btrfs/tests/extent-io-tests.c | 12 +++----
> fs/btrfs/zoned.c | 2 +-
> 10 files changed, 67 insertions(+), 67 deletions(-)
>
> diff --git a/fs/btrfs/accessors.c b/fs/btrfs/accessors.c
> index e3716516ca387..a2bdbc7990906 100644
> --- a/fs/btrfs/accessors.c
> +++ b/fs/btrfs/accessors.c
> @@ -14,10 +14,10 @@ static bool check_setget_bounds(const struct extent_buffer *eb,
> {
> const unsigned long member_offset = (unsigned long)ptr + off;
>
> - if (unlikely(member_offset + size > eb->len)) {
> + if (unlikely(member_offset + size > eb_len(eb))) {
> btrfs_warn(eb->fs_info,
> "bad eb member %s: ptr 0x%lx start %llu member offset %lu size %d",
> - (member_offset > eb->len ? "start" : "end"),
> + (member_offset > eb_len(eb) ? "start" : "end"),
> (unsigned long)ptr, eb->start, member_offset, size);
> return false;
> }
> diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
> index 3592300ae3e2e..31eb7419fe11f 100644
> --- a/fs/btrfs/disk-io.c
> +++ b/fs/btrfs/disk-io.c
> @@ -190,7 +190,7 @@ static int btrfs_repair_eb_io_failure(const struct extent_buffer *eb,
> for (int i = 0; i < num_extent_folios(eb); i++) {
> struct folio *folio = eb->folios[i];
> u64 start = max_t(u64, eb->start, folio_pos(folio));
> - u64 end = min_t(u64, eb->start + eb->len,
> + u64 end = min_t(u64, eb->start + fs_info->nodesize,
> folio_pos(folio) + eb->folio_size);
> u32 len = end - start;
> phys_addr_t paddr = PFN_PHYS(folio_pfn(folio)) +
> @@ -230,7 +230,7 @@ int btrfs_read_extent_buffer(struct extent_buffer *eb,
> break;
>
> num_copies = btrfs_num_copies(fs_info,
> - eb->start, eb->len);
> + eb->start, fs_info->nodesize);
> if (num_copies == 1)
> break;
>
> @@ -260,6 +260,7 @@ blk_status_t btree_csum_one_bio(struct btrfs_bio *bbio)
> {
> struct extent_buffer *eb = bbio->private;
> struct btrfs_fs_info *fs_info = eb->fs_info;
> + u32 nodesize = fs_info->nodesize;
> u64 found_start = btrfs_header_bytenr(eb);
> u64 last_trans;
> u8 result[BTRFS_CSUM_SIZE];
> @@ -268,7 +269,7 @@ blk_status_t btree_csum_one_bio(struct btrfs_bio *bbio)
> /* Btree blocks are always contiguous on disk. */
> if (WARN_ON_ONCE(bbio->file_offset != eb->start))
> return BLK_STS_IOERR;
> - if (WARN_ON_ONCE(bbio->bio.bi_iter.bi_size != eb->len))
> + if (WARN_ON_ONCE(bbio->bio.bi_iter.bi_size != nodesize))
> return BLK_STS_IOERR;
>
> /*
> @@ -277,7 +278,7 @@ blk_status_t btree_csum_one_bio(struct btrfs_bio *bbio)
> * ordering of I/O without unnecessarily writing out data.
> */
> if (test_bit(EXTENT_BUFFER_ZONED_ZEROOUT, &eb->bflags)) {
> - memzero_extent_buffer(eb, 0, eb->len);
> + memzero_extent_buffer(eb, 0, nodesize);
> return BLK_STS_OK;
> }
>
> @@ -883,7 +884,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
> btrfs_set_root_generation(&root->root_item, trans->transid);
> btrfs_set_root_level(&root->root_item, 0);
> btrfs_set_root_refs(&root->root_item, 1);
> - btrfs_set_root_used(&root->root_item, leaf->len);
> + btrfs_set_root_used(&root->root_item, fs_info->nodesize);
> btrfs_set_root_last_snapshot(&root->root_item, 0);
> btrfs_set_root_dirid(&root->root_item, 0);
> if (is_fstree(objectid))
> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
> index e0811a86d0cbd..25560a162d93e 100644
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -2211,7 +2211,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
> extent_op->update_flags = true;
> extent_op->update_key = false;
>
> - ret = btrfs_add_delayed_extent_op(trans, eb->start, eb->len,
> + ret = btrfs_add_delayed_extent_op(trans, eb->start, eb_len(eb),
> btrfs_header_level(eb), extent_op);
> if (ret)
> btrfs_free_delayed_extent_op(extent_op);
> @@ -2660,10 +2660,10 @@ int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
> if (ret)
> goto out;
>
> - pin_down_extent(trans, cache, eb->start, eb->len, 0);
> + pin_down_extent(trans, cache, eb->start, eb_len(eb), 0);
>
> /* remove us from the free space cache (if we're there at all) */
> - ret = btrfs_remove_free_space(cache, eb->start, eb->len);
> + ret = btrfs_remove_free_space(cache, eb->start, eb_len(eb));
> out:
> btrfs_put_block_group(cache);
> return ret;
> @@ -3436,13 +3436,14 @@ int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
> {
> struct btrfs_fs_info *fs_info = trans->fs_info;
> struct btrfs_block_group *bg;
> + u32 nodesize = fs_info->nodesize;
> int ret;
>
> if (root_id != BTRFS_TREE_LOG_OBJECTID) {
> struct btrfs_ref generic_ref = {
> .action = BTRFS_DROP_DELAYED_REF,
> .bytenr = buf->start,
> - .num_bytes = buf->len,
> + .num_bytes = nodesize,
> .parent = parent,
> .owning_root = btrfs_header_owner(buf),
> .ref_root = root_id,
> @@ -3478,7 +3479,7 @@ int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
> bg = btrfs_lookup_block_group(fs_info, buf->start);
>
> if (btrfs_header_flag(buf, BTRFS_HEADER_FLAG_WRITTEN)) {
> - pin_down_extent(trans, bg, buf->start, buf->len, 1);
> + pin_down_extent(trans, bg, buf->start, nodesize, 1);
> btrfs_put_block_group(bg);
> goto out;
> }
> @@ -3502,17 +3503,17 @@ int btrfs_free_tree_block(struct btrfs_trans_handle *trans,
>
> if (test_bit(BTRFS_FS_TREE_MOD_LOG_USERS, &fs_info->flags)
> || btrfs_is_zoned(fs_info)) {
> - pin_down_extent(trans, bg, buf->start, buf->len, 1);
> + pin_down_extent(trans, bg, buf->start, nodesize, 1);
> btrfs_put_block_group(bg);
> goto out;
> }
>
> WARN_ON(test_bit(EXTENT_BUFFER_DIRTY, &buf->bflags));
>
> - btrfs_add_free_space(bg, buf->start, buf->len);
> - btrfs_free_reserved_bytes(bg, buf->len, 0);
> + btrfs_add_free_space(bg, buf->start, nodesize);
> + btrfs_free_reserved_bytes(bg, nodesize, 0);
> btrfs_put_block_group(bg);
> - trace_btrfs_reserved_extent_free(fs_info, buf->start, buf->len);
> + trace_btrfs_reserved_extent_free(fs_info, buf->start, nodesize);
>
> out:
> return 0;
> @@ -4768,7 +4769,7 @@ int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans,
> return -ENOSPC;
> }
>
> - ret = pin_down_extent(trans, cache, eb->start, eb->len, 1);
> + ret = pin_down_extent(trans, cache, eb->start, eb_len(eb), 1);
> btrfs_put_block_group(cache);
> return ret;
> }
> @@ -5050,6 +5051,7 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
> struct btrfs_fs_info *fs_info = root->fs_info;
> struct extent_buffer *buf;
> u64 lockdep_owner = owner;
> + u32 nodesize = fs_info->nodesize;
>
> buf = btrfs_find_create_tree_block(fs_info, bytenr, owner, level);
> if (IS_ERR(buf))
> @@ -5107,16 +5109,16 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
> */
> if (buf->log_index == 0)
> btrfs_set_extent_bit(&root->dirty_log_pages, buf->start,
> - buf->start + buf->len - 1,
> + buf->start + nodesize - 1,
> EXTENT_DIRTY, NULL);
> else
> btrfs_set_extent_bit(&root->dirty_log_pages, buf->start,
> - buf->start + buf->len - 1,
> + buf->start + nodesize - 1,
> EXTENT_NEW, NULL);
> } else {
> buf->log_index = -1;
> btrfs_set_extent_bit(&trans->transaction->dirty_pages, buf->start,
> - buf->start + buf->len - 1, EXTENT_DIRTY, NULL);
> + buf->start + nodesize - 1, EXTENT_DIRTY, NULL);
> }
> /* this returns a buffer locked for blocking */
> return buf;
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index 20cdddd924852..e4050fd5db285 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -76,8 +76,8 @@ void btrfs_extent_buffer_leak_debug_check(struct btrfs_fs_info *fs_info)
> eb = list_first_entry(&fs_info->allocated_ebs,
> struct extent_buffer, leak_list);
> pr_err(
> - "BTRFS: buffer leak start %llu len %u refs %d bflags %lu owner %llu\n",
> - eb->start, eb->len, atomic_read(&eb->refs), eb->bflags,
> + "BTRFS: buffer leak start %llu refs %d bflags %lu owner %llu\n",
> + eb->start, atomic_read(&eb->refs), eb->bflags,
> btrfs_header_owner(eb));
> list_del(&eb->leak_list);
> WARN_ON_ONCE(1);
> @@ -1746,8 +1746,8 @@ static noinline_for_stack bool lock_extent_buffer_for_io(struct extent_buffer *e
>
> btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
> percpu_counter_add_batch(&fs_info->dirty_metadata_bytes,
> - -eb->len,
> - fs_info->dirty_metadata_batch);
> + -fs_info->nodesize,
> + fs_info->dirty_metadata_batch);
> ret = true;
> } else {
> spin_unlock(&eb->refs_lock);
> @@ -1953,7 +1953,7 @@ static unsigned int buffer_tree_get_ebs_tag(struct btrfs_fs_info *fs_info,
> rcu_read_lock();
> while ((eb = find_get_eb(&xas, end, tag)) != NULL) {
> if (!eb_batch_add(batch, eb)) {
> - *start = (eb->start + eb->len) >> fs_info->sectorsize_bits;
> + *start = (eb->start + fs_info->nodesize) >> fs_info->sectorsize_bits;
> goto out;
> }
> }
> @@ -2020,7 +2020,7 @@ static void prepare_eb_write(struct extent_buffer *eb)
> nritems = btrfs_header_nritems(eb);
> if (btrfs_header_level(eb) > 0) {
> end = btrfs_node_key_ptr_offset(eb, nritems);
> - memzero_extent_buffer(eb, end, eb->len - end);
> + memzero_extent_buffer(eb, end, eb_len(eb) - end);
> } else {
> /*
> * Leaf:
> @@ -2056,7 +2056,7 @@ static noinline_for_stack void write_one_eb(struct extent_buffer *eb,
> struct folio *folio = eb->folios[i];
> u64 range_start = max_t(u64, eb->start, folio_pos(folio));
> u32 range_len = min_t(u64, folio_pos(folio) + folio_size(folio),
> - eb->start + eb->len) - range_start;
> + eb->start + fs_info->nodesize) - range_start;
>
> folio_lock(folio);
> btrfs_meta_folio_clear_dirty(folio, eb);
> @@ -2171,7 +2171,7 @@ int btree_write_cache_pages(struct address_space *mapping,
> if (ctx.zoned_bg) {
> /* Mark the last eb in the block group. */
> btrfs_schedule_zone_finish_bg(ctx.zoned_bg, eb);
> - ctx.zoned_bg->meta_write_pointer += eb->len;
> + ctx.zoned_bg->meta_write_pointer += fs_info->nodesize;
> }
> write_one_eb(eb, wbc);
> }
> @@ -2807,7 +2807,6 @@ static struct extent_buffer *__alloc_extent_buffer(struct btrfs_fs_info *fs_info
>
> eb = kmem_cache_zalloc(extent_buffer_cache, GFP_NOFS|__GFP_NOFAIL);
> eb->start = start;
> - eb->len = fs_info->nodesize;
> eb->fs_info = fs_info;
> init_rwsem(&eb->lock);
>
> @@ -2816,8 +2815,6 @@ static struct extent_buffer *__alloc_extent_buffer(struct btrfs_fs_info *fs_info
> spin_lock_init(&eb->refs_lock);
> atomic_set(&eb->refs, 1);
>
> - ASSERT(eb->len <= BTRFS_MAX_METADATA_BLOCKSIZE);
> -
> return eb;
> }
>
> @@ -3505,7 +3502,7 @@ void btrfs_clear_buffer_dirty(struct btrfs_trans_handle *trans,
> return;
>
> buffer_tree_clear_mark(eb, PAGECACHE_TAG_DIRTY);
> - percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, -eb->len,
> + percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, -fs_info->nodesize,
> fs_info->dirty_metadata_batch);
>
> for (int i = 0; i < num_extent_folios(eb); i++) {
> @@ -3557,8 +3554,8 @@ void set_extent_buffer_dirty(struct extent_buffer *eb)
> if (subpage)
> folio_unlock(eb->folios[0]);
> percpu_counter_add_batch(&eb->fs_info->dirty_metadata_bytes,
> - eb->len,
> - eb->fs_info->dirty_metadata_batch);
> + eb_len(eb),
> + eb->fs_info->dirty_metadata_batch);
> }
> #ifdef CONFIG_BTRFS_DEBUG
> for (int i = 0; i < num_extent_folios(eb); i++)
> @@ -3670,7 +3667,7 @@ int read_extent_buffer_pages_nowait(struct extent_buffer *eb, int mirror_num,
> struct folio *folio = eb->folios[i];
> u64 range_start = max_t(u64, eb->start, folio_pos(folio));
> u32 range_len = min_t(u64, folio_pos(folio) + folio_size(folio),
> - eb->start + eb->len) - range_start;
> + eb->start + eb_len(eb)) - range_start;
>
> bio_add_folio_nofail(&bbio->bio, folio, range_len,
> offset_in_folio(folio, range_start));
> @@ -3698,8 +3695,8 @@ static bool report_eb_range(const struct extent_buffer *eb, unsigned long start,
> unsigned long len)
> {
> btrfs_warn(eb->fs_info,
> - "access to eb bytenr %llu len %u out of range start %lu len %lu",
> - eb->start, eb->len, start, len);
> + "access to eb bytenr %llu out of range start %lu len %lu",
> + eb->start, start, len);
> DEBUG_WARN();
>
> return true;
> @@ -3717,8 +3714,8 @@ static inline int check_eb_range(const struct extent_buffer *eb,
> {
> unsigned long offset;
>
> - /* start, start + len should not go beyond eb->len nor overflow */
> - if (unlikely(check_add_overflow(start, len, &offset) || offset > eb->len))
> + /* start, start + len should not go beyond nodesize nor overflow */
> + if (unlikely(check_add_overflow(start, len, &offset) || offset > eb_len(eb)))
> return report_eb_range(eb, start, len);
>
> return false;
> @@ -3774,8 +3771,8 @@ int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb,
> unsigned long i = get_eb_folio_index(eb, start);
> int ret = 0;
>
> - WARN_ON(start > eb->len);
> - WARN_ON(start + len > eb->start + eb->len);
> + WARN_ON(start > eb_len(eb));
> + WARN_ON(start + len > eb->start + eb_len(eb));
>
> if (eb->addr) {
> if (copy_to_user_nofault(dstv, eb->addr + start, len))
> @@ -3866,8 +3863,8 @@ static void assert_eb_folio_uptodate(const struct extent_buffer *eb, int i)
> folio = eb->folios[0];
> ASSERT(i == 0);
> if (WARN_ON(!btrfs_subpage_test_uptodate(fs_info, folio,
> - eb->start, eb->len)))
> - btrfs_subpage_dump_bitmap(fs_info, folio, eb->start, eb->len);
> + eb->start, fs_info->nodesize)))
> + btrfs_subpage_dump_bitmap(fs_info, folio, eb->start, fs_info->nodesize);
> } else {
> WARN_ON(!folio_test_uptodate(folio));
> }
> @@ -3960,12 +3957,10 @@ void copy_extent_buffer_full(const struct extent_buffer *dst,
> const int unit_size = src->folio_size;
> unsigned long cur = 0;
>
> - ASSERT(dst->len == src->len);
> -
> - while (cur < src->len) {
> + while (cur < eb_len(src)) {
> unsigned long index = get_eb_folio_index(src, cur);
> unsigned long offset = get_eb_offset_in_folio(src, cur);
> - unsigned long cur_len = min(src->len, unit_size - offset);
> + unsigned long cur_len = min(eb_len(src), unit_size - offset);
> void *addr = folio_address(src->folios[index]) + offset;
>
> write_extent_buffer(dst, addr, cur, cur_len);
> @@ -3980,7 +3975,6 @@ void copy_extent_buffer(const struct extent_buffer *dst,
> unsigned long len)
> {
> const int unit_size = dst->folio_size;
> - u64 dst_len = dst->len;
> size_t cur;
> size_t offset;
> char *kaddr;
> @@ -3990,8 +3984,6 @@ void copy_extent_buffer(const struct extent_buffer *dst,
> check_eb_range(src, src_offset, len))
> return;
>
> - WARN_ON(src->len != dst_len);
> -
> offset = get_eb_offset_in_folio(dst, dst_offset);
>
> while (len > 0) {
> @@ -4266,7 +4258,7 @@ static int try_release_subpage_extent_buffer(struct folio *folio)
> xa_unlock_irq(&fs_info->buffer_tree);
> break;
> }
> - cur = eb->start + eb->len;
> + cur = eb->start + fs_info->nodesize;
>
> /*
> * The same as try_release_extent_buffer(), to ensure the eb
> diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
> index 1415679d7f88c..9a842eea47d6d 100644
> --- a/fs/btrfs/extent_io.h
> +++ b/fs/btrfs/extent_io.h
> @@ -16,6 +16,7 @@
> #include "messages.h"
> #include "ulist.h"
> #include "misc.h"
> +#include "fs.h"
>
> struct page;
> struct file;
> @@ -80,7 +81,6 @@ void __cold extent_buffer_free_cachep(void);
> #define INLINE_EXTENT_BUFFER_PAGES (BTRFS_MAX_METADATA_BLOCKSIZE / PAGE_SIZE)
> struct extent_buffer {
> u64 start;
> - u32 len;
> u32 folio_size;
> unsigned long bflags;
> struct btrfs_fs_info *fs_info;
> @@ -263,17 +263,22 @@ void btrfs_readahead_tree_block(struct btrfs_fs_info *fs_info,
> u64 bytenr, u64 owner_root, u64 gen, int level);
> void btrfs_readahead_node_child(struct extent_buffer *node, int slot);
>
> +static inline u32 eb_len(const struct extent_buffer *eb)
> +{
> + return eb->fs_info->nodesize;
> +}
Please always add a "btrfs_" prefix to the name of exported functions.
In this case I don't think adding this helper adds any value.
We can just do eb->fs_info->nodesize everywhere and in some places we
already have fs_info in a local variable and can just do
fs_info->nodesize.
Thanks.
> +
> /* Note: this can be used in for loops without caching the value in a variable. */
> static inline int __pure num_extent_pages(const struct extent_buffer *eb)
> {
> /*
> * For sectorsize == PAGE_SIZE case, since nodesize is always aligned to
> - * sectorsize, it's just eb->len >> PAGE_SHIFT.
> + * sectorsize, it's just nodesize >> PAGE_SHIFT.
> *
> * For sectorsize < PAGE_SIZE case, we could have nodesize < PAGE_SIZE,
> * thus have to ensure we get at least one page.
> */
> - return (eb->len >> PAGE_SHIFT) ?: 1;
> + return (eb_len(eb) >> PAGE_SHIFT) ?: 1;
> }
>
> /*
> diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
> index 68fac77fb95d1..6be2d56d44917 100644
> --- a/fs/btrfs/ioctl.c
> +++ b/fs/btrfs/ioctl.c
> @@ -598,7 +598,7 @@ static noinline int create_subvol(struct mnt_idmap *idmap,
> btrfs_set_root_generation(root_item, trans->transid);
> btrfs_set_root_level(root_item, 0);
> btrfs_set_root_refs(root_item, 1);
> - btrfs_set_root_used(root_item, leaf->len);
> + btrfs_set_root_used(root_item, fs_info->nodesize);
> btrfs_set_root_last_snapshot(root_item, 0);
>
> btrfs_set_root_generation_v2(root_item,
> diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
> index 6287e71ebad5f..5086485a4ae21 100644
> --- a/fs/btrfs/relocation.c
> +++ b/fs/btrfs/relocation.c
> @@ -4352,7 +4352,7 @@ int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
> mark_block_processed(rc, node);
>
> if (first_cow && level > 0)
> - rc->nodes_relocated += buf->len;
> + rc->nodes_relocated += fs_info->nodesize;
> }
>
> if (level == 0 && first_cow && rc->stage == UPDATE_DATA_PTRS)
> diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c
> index d4f0192334936..711792f32e9ce 100644
> --- a/fs/btrfs/subpage.c
> +++ b/fs/btrfs/subpage.c
> @@ -631,7 +631,7 @@ void btrfs_meta_folio_set_##name(struct folio *folio, const struct extent_buffer
> folio_set_func(folio); \
> return; \
> } \
> - btrfs_subpage_set_##name(eb->fs_info, folio, eb->start, eb->len); \
> + btrfs_subpage_set_##name(eb->fs_info, folio, eb->start, eb_len(eb)); \
> } \
> void btrfs_meta_folio_clear_##name(struct folio *folio, const struct extent_buffer *eb) \
> { \
> @@ -639,13 +639,13 @@ void btrfs_meta_folio_clear_##name(struct folio *folio, const struct extent_buff
> folio_clear_func(folio); \
> return; \
> } \
> - btrfs_subpage_clear_##name(eb->fs_info, folio, eb->start, eb->len); \
> + btrfs_subpage_clear_##name(eb->fs_info, folio, eb->start, eb_len(eb)); \
> } \
> bool btrfs_meta_folio_test_##name(struct folio *folio, const struct extent_buffer *eb) \
> { \
> if (!btrfs_meta_is_subpage(eb->fs_info)) \
> return folio_test_func(folio); \
> - return btrfs_subpage_test_##name(eb->fs_info, folio, eb->start, eb->len); \
> + return btrfs_subpage_test_##name(eb->fs_info, folio, eb->start, eb_len(eb)); \
> }
> IMPLEMENT_BTRFS_PAGE_OPS(uptodate, folio_mark_uptodate, folio_clear_uptodate,
> folio_test_uptodate);
> @@ -765,7 +765,7 @@ bool btrfs_meta_folio_clear_and_test_dirty(struct folio *folio, const struct ext
> return true;
> }
>
> - last = btrfs_subpage_clear_and_test_dirty(eb->fs_info, folio, eb->start, eb->len);
> + last = btrfs_subpage_clear_and_test_dirty(eb->fs_info, folio, eb->start, eb_len(eb));
> if (last) {
> folio_clear_dirty_for_io(folio);
> return true;
> diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
> index 00da54f0164c9..657f8f1d9263e 100644
> --- a/fs/btrfs/tests/extent-io-tests.c
> +++ b/fs/btrfs/tests/extent-io-tests.c
> @@ -342,7 +342,7 @@ static int check_eb_bitmap(unsigned long *bitmap, struct extent_buffer *eb)
> {
> unsigned long i;
>
> - for (i = 0; i < eb->len * BITS_PER_BYTE; i++) {
> + for (i = 0; i < eb_len(eb) * BITS_PER_BYTE; i++) {
> int bit, bit1;
>
> bit = !!test_bit(i, bitmap);
> @@ -411,7 +411,7 @@ static int test_bitmap_clear(const char *name, unsigned long *bitmap,
> static int __test_eb_bitmaps(unsigned long *bitmap, struct extent_buffer *eb)
> {
> unsigned long i, j;
> - unsigned long byte_len = eb->len;
> + unsigned long byte_len = eb_len(eb);
> u32 x;
> int ret;
>
> @@ -670,7 +670,7 @@ static int test_find_first_clear_extent_bit(void)
> static void dump_eb_and_memory_contents(struct extent_buffer *eb, void *memory,
> const char *test_name)
> {
> - for (int i = 0; i < eb->len; i++) {
> + for (int i = 0; i < eb_len(eb); i++) {
> struct page *page = folio_page(eb->folios[i >> PAGE_SHIFT], 0);
> void *addr = page_address(page) + offset_in_page(i);
>
> @@ -686,7 +686,7 @@ static void dump_eb_and_memory_contents(struct extent_buffer *eb, void *memory,
> static int verify_eb_and_memory(struct extent_buffer *eb, void *memory,
> const char *test_name)
> {
> - for (int i = 0; i < (eb->len >> PAGE_SHIFT); i++) {
> + for (int i = 0; i < (eb_len(eb) >> PAGE_SHIFT); i++) {
> void *eb_addr = folio_address(eb->folios[i]);
>
> if (memcmp(memory + (i << PAGE_SHIFT), eb_addr, PAGE_SIZE) != 0) {
> @@ -703,8 +703,8 @@ static int verify_eb_and_memory(struct extent_buffer *eb, void *memory,
> */
> static void init_eb_and_memory(struct extent_buffer *eb, void *memory)
> {
> - get_random_bytes(memory, eb->len);
> - write_extent_buffer(eb, memory, 0, eb->len);
> + get_random_bytes(memory, eb_len(eb));
> + write_extent_buffer(eb, memory, 0, eb_len(eb));
> }
>
> static int test_eb_mem_ops(u32 sectorsize, u32 nodesize)
> diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
> index 9d42bf2bfd746..c7a8cdd87c509 100644
> --- a/fs/btrfs/zoned.c
> +++ b/fs/btrfs/zoned.c
> @@ -2422,7 +2422,7 @@ void btrfs_schedule_zone_finish_bg(struct btrfs_block_group *bg,
> struct extent_buffer *eb)
> {
> if (!test_bit(BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE, &bg->runtime_flags) ||
> - eb->start + eb->len * 2 <= bg->start + bg->zone_capacity)
> + eb->start + eb_len(eb) * 2 <= bg->start + bg->zone_capacity)
> return;
>
> if (WARN_ON(bg->zone_finish_work.func == btrfs_zone_finish_endio_workfn)) {
> --
> 2.47.2
>
>
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