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btrfs: convert __process_pages_contig() to use filemap_get_folios_contig()

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Convert to use folios throughout.  This is in preparation for the removal
of find_get_pages_contig().  Now also supports large folios.

Since we may receive more than nr_pages pages, nr_pages may underflow. 
Since nr_pages > 0 is equivalent to index <= end_index, we replaced it
with this check instead.

Link: https://lkml.kernel.org/r/20220824004023.77310-3-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: David Sterba <dsterba@suse.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Chris Mason <clm@fb.com>
Cc: David Sterba <dsterb@suse.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Vishal Moola (Oracle) 2022-08-23 17:40:18 -07:00 committed by Andrew Morton
parent 35b471467f
commit 04c6b79ae4
1 changed files with 15 additions and 18 deletions
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33
fs/btrfs/extent_io.c
View file

@ -1900,9 +1900,8 @@ static int __process_pages_contig(struct address_space *mapping,
pgoff_t start_index = start >> PAGE_SHIFT;
pgoff_t end_index = end >> PAGE_SHIFT;
pgoff_t index = start_index;
unsigned long nr_pages = end_index - start_index + 1;
unsigned long pages_processed = 0;
struct page *pages[16];
struct folio_batch fbatch;
int err = 0;
int i;
@ -1911,16 +1910,17 @@ static int __process_pages_contig(struct address_space *mapping,
ASSERT(processed_end && *processed_end == start);
}
if ((page_ops & PAGE_SET_ERROR) && nr_pages > 0)
if ((page_ops & PAGE_SET_ERROR) && start_index <= end_index)
mapping_set_error(mapping, -EIO);
while (nr_pages > 0) {
int found_pages;
folio_batch_init(&fbatch);
while (index <= end_index) {
int found_folios;
found_pages = find_get_pages_contig(mapping, index,
min_t(unsigned long,
nr_pages, ARRAY_SIZE(pages)), pages);
if (found_pages == 0) {
found_folios = filemap_get_folios_contig(mapping, &index,
end_index, &fbatch);
if (found_folios == 0) {
/*
* Only if we're going to lock these pages, we can find
* nothing at @index.
@ -1930,23 +1930,20 @@ static int __process_pages_contig(struct address_space *mapping,
goto out;
}
for (i = 0; i < found_pages; i++) {
for (i = 0; i < found_folios; i++) {
int process_ret;
struct folio *folio = fbatch.folios[i];
process_ret = process_one_page(fs_info, mapping,
pages[i], locked_page, page_ops,
&folio->page, locked_page, page_ops,
start, end);
if (process_ret < 0) {
for (; i < found_pages; i++)
put_page(pages[i]);
err = -EAGAIN;
folio_batch_release(&fbatch);
goto out;
}
put_page(pages[i]);
pages_processed++;
pages_processed += folio_nr_pages(folio);
}
nr_pages -= found_pages;
index += found_pages;
folio_batch_release(&fbatch);
cond_resched();
}
out: