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btrfs: introduce struct to consolidate extent buffer write context

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Introduce btrfs_eb_write_context to consolidate writeback_control and the
exntent buffer context.  This will help adding a block group context as
well.

While at it, move the eb context setting before
btrfs_check_meta_write_pointer(). We can set it here because we anyway need
to skip pages in the same eb if that eb is rejected by
btrfs_check_meta_write_pointer().

Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2023-08-08 01:12:31 +09:00 committed by David Sterba
parent 9c93c238c1
commit 861093eff4
2 changed files with 12 additions and 7 deletions
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14
fs/btrfs/extent_io.c
View File

@ -1805,9 +1805,9 @@ static int submit_eb_subpage(struct page *page, struct writeback_control *wbc)
* previous call.
* Return <0 for fatal error.
*/
static int submit_eb_page(struct page *page, struct writeback_control *wbc,
struct extent_buffer **eb_context)
static int submit_eb_page(struct page *page, struct btrfs_eb_write_context *ctx)
{
struct writeback_control *wbc = ctx->wbc;
struct address_space *mapping = page->mapping;
struct btrfs_block_group *cache = NULL;
struct extent_buffer *eb;
@ -1836,7 +1836,7 @@ static int submit_eb_page(struct page *page, struct writeback_control *wbc,
return 0;
}
if (eb == *eb_context) {
if (eb == ctx->eb) {
spin_unlock(&mapping->private_lock);
return 0;
}
@ -1845,6 +1845,8 @@ static int submit_eb_page(struct page *page, struct writeback_control *wbc,
if (!ret)
return 0;
ctx->eb = eb;
if (!btrfs_check_meta_write_pointer(eb->fs_info, eb, &cache)) {
/*
* If for_sync, this hole will be filled with
@ -1858,8 +1860,6 @@ static int submit_eb_page(struct page *page, struct writeback_control *wbc,
return ret;
}
*eb_context = eb;
if (!lock_extent_buffer_for_io(eb, wbc)) {
btrfs_revert_meta_write_pointer(cache, eb);
if (cache)
@ -1882,7 +1882,7 @@ static int submit_eb_page(struct page *page, struct writeback_control *wbc,
int btree_write_cache_pages(struct address_space *mapping,
struct writeback_control *wbc)
{
struct extent_buffer *eb_context = NULL;
struct btrfs_eb_write_context ctx = { .wbc = wbc };
struct btrfs_fs_info *fs_info = BTRFS_I(mapping->host)->root->fs_info;
int ret = 0;
int done = 0;
@ -1924,7 +1924,7 @@ retry:
for (i = 0; i < nr_folios; i++) {
struct folio *folio = fbatch.folios[i];
ret = submit_eb_page(&folio->page, wbc, &eb_context);
ret = submit_eb_page(&folio->page, &ctx);
if (ret == 0)
continue;
if (ret < 0) {

5
fs/btrfs/extent_io.h
View File

@ -93,6 +93,11 @@ struct extent_buffer {
#endif
};
struct btrfs_eb_write_context {
struct writeback_control *wbc;
struct extent_buffer *eb;
};
/*
* Get the correct offset inside the page of extent buffer.
*