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-rw-r--r--fs/buffer.c96
1 files changed, 45 insertions, 51 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 10effe583d47..ed26cb1d381d 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -613,17 +613,14 @@ EXPORT_SYMBOL(mark_buffer_dirty_inode);
* FIXME: may need to call ->reservepage here as well. That's rather up to the
* address_space though.
*/
-int __set_page_dirty_buffers(struct page *page)
+bool block_dirty_folio(struct address_space *mapping, struct folio *folio)
{
- int newly_dirty;
- struct address_space *mapping = page_mapping(page);
-
- if (unlikely(!mapping))
- return !TestSetPageDirty(page);
+ struct buffer_head *head;
+ bool newly_dirty;
spin_lock(&mapping->private_lock);
- if (page_has_buffers(page)) {
- struct buffer_head *head = page_buffers(page);
+ head = folio_buffers(folio);
+ if (head) {
struct buffer_head *bh = head;
do {
@@ -635,21 +632,21 @@ int __set_page_dirty_buffers(struct page *page)
* Lock out page's memcg migration to keep PageDirty
* synchronized with per-memcg dirty page counters.
*/
- lock_page_memcg(page);
- newly_dirty = !TestSetPageDirty(page);
+ folio_memcg_lock(folio);
+ newly_dirty = !folio_test_set_dirty(folio);
spin_unlock(&mapping->private_lock);
if (newly_dirty)
- __set_page_dirty(page, mapping, 1);
+ __folio_mark_dirty(folio, mapping, 1);
- unlock_page_memcg(page);
+ folio_memcg_unlock(folio);
if (newly_dirty)
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
return newly_dirty;
}
-EXPORT_SYMBOL(__set_page_dirty_buffers);
+EXPORT_SYMBOL(block_dirty_folio);
/*
* Write out and wait upon a list of buffers.
@@ -1484,41 +1481,40 @@ static void discard_buffer(struct buffer_head * bh)
}
/**
- * block_invalidatepage - invalidate part or all of a buffer-backed page
- *
- * @page: the page which is affected
+ * block_invalidate_folio - Invalidate part or all of a buffer-backed folio.
+ * @folio: The folio which is affected.
* @offset: start of the range to invalidate
* @length: length of the range to invalidate
*
- * block_invalidatepage() is called when all or part of the page has become
+ * block_invalidate_folio() is called when all or part of the folio has been
* invalidated by a truncate operation.
*
- * block_invalidatepage() does not have to release all buffers, but it must
+ * block_invalidate_folio() does not have to release all buffers, but it must
* ensure that no dirty buffer is left outside @offset and that no I/O
* is underway against any of the blocks which are outside the truncation
* point. Because the caller is about to free (and possibly reuse) those
* blocks on-disk.
*/
-void block_invalidatepage(struct page *page, unsigned int offset,
- unsigned int length)
+void block_invalidate_folio(struct folio *folio, size_t offset, size_t length)
{
struct buffer_head *head, *bh, *next;
- unsigned int curr_off = 0;
- unsigned int stop = length + offset;
+ size_t curr_off = 0;
+ size_t stop = length + offset;
- BUG_ON(!PageLocked(page));
- if (!page_has_buffers(page))
- goto out;
+ BUG_ON(!folio_test_locked(folio));
/*
* Check for overflow
*/
- BUG_ON(stop > PAGE_SIZE || stop < length);
+ BUG_ON(stop > folio_size(folio) || stop < length);
+
+ head = folio_buffers(folio);
+ if (!head)
+ return;
- head = page_buffers(page);
bh = head;
do {
- unsigned int next_off = curr_off + bh->b_size;
+ size_t next_off = curr_off + bh->b_size;
next = bh->b_this_page;
/*
@@ -1537,21 +1533,21 @@ void block_invalidatepage(struct page *page, unsigned int offset,
} while (bh != head);
/*
- * We release buffers only if the entire page is being invalidated.
+ * We release buffers only if the entire folio is being invalidated.
* The get_block cached value has been unconditionally invalidated,
* so real IO is not possible anymore.
*/
- if (length == PAGE_SIZE)
- try_to_release_page(page, 0);
+ if (length == folio_size(folio))
+ filemap_release_folio(folio, 0);
out:
return;
}
-EXPORT_SYMBOL(block_invalidatepage);
+EXPORT_SYMBOL(block_invalidate_folio);
/*
* We attach and possibly dirty the buffers atomically wrt
- * __set_page_dirty_buffers() via private_lock. try_to_free_buffers
+ * block_dirty_folio() via private_lock. try_to_free_buffers
* is already excluded via the page lock.
*/
void create_empty_buffers(struct page *page,
@@ -1726,12 +1722,12 @@ int __block_write_full_page(struct inode *inode, struct page *page,
(1 << BH_Dirty)|(1 << BH_Uptodate));
/*
- * Be very careful. We have no exclusion from __set_page_dirty_buffers
+ * Be very careful. We have no exclusion from block_dirty_folio
* here, and the (potentially unmapped) buffers may become dirty at
* any time. If a buffer becomes dirty here after we've inspected it
* then we just miss that fact, and the page stays dirty.
*
- * Buffers outside i_size may be dirtied by __set_page_dirty_buffers;
+ * Buffers outside i_size may be dirtied by block_dirty_folio;
* handle that here by just cleaning them.
*/
@@ -2208,29 +2204,27 @@ int generic_write_end(struct file *file, struct address_space *mapping,
EXPORT_SYMBOL(generic_write_end);
/*
- * block_is_partially_uptodate checks whether buffers within a page are
+ * block_is_partially_uptodate checks whether buffers within a folio are
* uptodate or not.
*
- * Returns true if all buffers which correspond to a file portion
- * we want to read are uptodate.
+ * Returns true if all buffers which correspond to the specified part
+ * of the folio are uptodate.
*/
-int block_is_partially_uptodate(struct page *page, unsigned long from,
- unsigned long count)
+bool block_is_partially_uptodate(struct folio *folio, size_t from, size_t count)
{
unsigned block_start, block_end, blocksize;
unsigned to;
struct buffer_head *bh, *head;
- int ret = 1;
+ bool ret = true;
- if (!page_has_buffers(page))
- return 0;
-
- head = page_buffers(page);
+ head = folio_buffers(folio);
+ if (!head)
+ return false;
blocksize = head->b_size;
- to = min_t(unsigned, PAGE_SIZE - from, count);
+ to = min_t(unsigned, folio_size(folio) - from, count);
to = from + to;
- if (from < blocksize && to > PAGE_SIZE - blocksize)
- return 0;
+ if (from < blocksize && to > folio_size(folio) - blocksize)
+ return false;
bh = head;
block_start = 0;
@@ -2238,7 +2232,7 @@ int block_is_partially_uptodate(struct page *page, unsigned long from,
block_end = block_start + blocksize;
if (block_end > from && block_start < to) {
if (!buffer_uptodate(bh)) {
- ret = 0;
+ ret = false;
break;
}
if (block_end >= to)
@@ -3185,7 +3179,7 @@ EXPORT_SYMBOL(sync_dirty_buffer);
*
* The same applies to regular filesystem pages: if all the buffers are
* clean then we set the page clean and proceed. To do that, we require
- * total exclusion from __set_page_dirty_buffers(). That is obtained with
+ * total exclusion from block_dirty_folio(). That is obtained with
* private_lock.
*
* try_to_free_buffers() is non-blocking.
@@ -3252,7 +3246,7 @@ int try_to_free_buffers(struct page *page)
* the page also.
*
* private_lock must be held over this entire operation in order
- * to synchronise against __set_page_dirty_buffers and prevent the
+ * to synchronise against block_dirty_folio and prevent the
* dirty bit from being lost.
*/
if (ret)