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btrfs: fix dirty_metadata_bytes for redirtied buffers

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commit f18cc97845 upstream.

dirty_metadata_bytes is decremented in both places that clear the dirty
bit in a buffer, but only incremented in btrfs_mark_buffer_dirty, which
means that a buffer that is redirtied using btrfs_redirty_list_add won't
be added to dirty_metadata_bytes, but it will be subtracted when written
out, leading an inconsistency in the counter.

Move the dirty_metadata_bytes from btrfs_mark_buffer_dirty into
set_extent_buffer_dirty to also account for the redirty case, and remove
the now unused set_extent_buffer_dirty return value.

Fixes: d3575156f6 ("btrfs: zoned: redirty released extent buffers")
CC: stable@vger.kernel.org # 5.15+
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Christoph Hellwig 2023-05-08 07:58:38 -07:00 committed by Greg Kroah-Hartman
parent 1b532748ba
commit 1ea89213cd
3 changed files with 6 additions and 10 deletions
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7
fs/btrfs/disk-io.c
View file

@ -4683,7 +4683,6 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
{
struct btrfs_fs_info *fs_info = buf->fs_info;
u64 transid = btrfs_header_generation(buf);
int was_dirty;
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
/*
@ -4698,11 +4697,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
if (transid != fs_info->generation)
WARN(1, KERN_CRIT "btrfs transid mismatch buffer %llu, found %llu running %llu\n",
buf->start, transid, fs_info->generation);
was_dirty = set_extent_buffer_dirty(buf);
if (!was_dirty)
percpu_counter_add_batch(&fs_info->dirty_metadata_bytes,
buf->len,
fs_info->dirty_metadata_batch);
set_extent_buffer_dirty(buf);
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
/*
* Since btrfs_mark_buffer_dirty() can be called with item pointer set

7
fs/btrfs/extent_io.c
View file

@ -4064,7 +4064,7 @@ void btrfs_clear_buffer_dirty(struct btrfs_trans_handle *trans,
WARN_ON(atomic_read(&eb->refs) == 0);
}
bool set_extent_buffer_dirty(struct extent_buffer *eb)
void set_extent_buffer_dirty(struct extent_buffer *eb)
{
int i;
int num_pages;
@ -4099,13 +4099,14 @@ bool set_extent_buffer_dirty(struct extent_buffer *eb)
eb->start, eb->len);
if (subpage)
unlock_page(eb->pages[0]);
percpu_counter_add_batch(&eb->fs_info->dirty_metadata_bytes,
eb->len,
eb->fs_info->dirty_metadata_batch);
}
#ifdef CONFIG_BTRFS_DEBUG
for (i = 0; i < num_pages; i++)
ASSERT(PageDirty(eb->pages[i]));
#endif
return was_dirty;
}
void clear_extent_buffer_uptodate(struct extent_buffer *eb)

2
fs/btrfs/extent_io.h
View file

@ -263,7 +263,7 @@ void extent_buffer_bitmap_set(const struct extent_buffer *eb, unsigned long star
void extent_buffer_bitmap_clear(const struct extent_buffer *eb,
unsigned long start, unsigned long pos,
unsigned long len);
bool set_extent_buffer_dirty(struct extent_buffer *eb);
void set_extent_buffer_dirty(struct extent_buffer *eb);
void set_extent_buffer_uptodate(struct extent_buffer *eb);
void clear_extent_buffer_uptodate(struct extent_buffer *eb);
int extent_buffer_under_io(const struct extent_buffer *eb);