bh = bh->b_this_page;
} while (bh != head);
}
-EXPORT_SYMBOL(buffer_check_dirty_writeback);
/*
* Block until a buffer comes unlocked. This doesn't stop it
pgoff_t index;
struct buffer_head *bh;
struct buffer_head *head;
- struct page *page;
+ struct folio *folio;
int all_mapped = 1;
static DEFINE_RATELIMIT_STATE(last_warned, HZ, 1);
index = block >> (PAGE_SHIFT - bd_inode->i_blkbits);
- page = find_get_page_flags(bd_mapping, index, FGP_ACCESSED);
- if (!page)
+ folio = __filemap_get_folio(bd_mapping, index, FGP_ACCESSED, 0);
+ if (IS_ERR(folio))
goto out;
spin_lock(&bd_mapping->private_lock);
- if (!page_has_buffers(page))
+ head = folio_buffers(folio);
+ if (!head)
goto out_unlock;
- head = page_buffers(page);
bh = head;
do {
if (!buffer_mapped(bh))
}
out_unlock:
spin_unlock(&bd_mapping->private_lock);
- put_page(page);
+ folio_put(folio);
out:
return ret;
}
}
EXPORT_SYMBOL_GPL(alloc_page_buffers);
-static inline void
-link_dev_buffers(struct page *page, struct buffer_head *head)
+static inline void link_dev_buffers(struct folio *folio,
+ struct buffer_head *head)
{
struct buffer_head *bh, *tail;
bh = bh->b_this_page;
} while (bh);
tail->b_this_page = head;
- attach_page_private(page, head);
+ folio_attach_private(folio, head);
}
static sector_t blkdev_max_block(struct block_device *bdev, unsigned int size)
}
/*
- * Initialise the state of a blockdev page's buffers.
+ * Initialise the state of a blockdev folio's buffers.
*/
-static sector_t
-init_page_buffers(struct page *page, struct block_device *bdev,
- sector_t block, int size)
+static sector_t folio_init_buffers(struct folio *folio,
+ struct block_device *bdev, sector_t block, int size)
{
- struct buffer_head *head = page_buffers(page);
+ struct buffer_head *head = folio_buffers(folio);
struct buffer_head *bh = head;
- int uptodate = PageUptodate(page);
+ bool uptodate = folio_test_uptodate(folio);
sector_t end_block = blkdev_max_block(bdev, size);
do {
pgoff_t index, int size, int sizebits, gfp_t gfp)
{
struct inode *inode = bdev->bd_inode;
- struct page *page;
+ struct folio *folio;
struct buffer_head *bh;
sector_t end_block;
int ret = 0;
*/
gfp_mask |= __GFP_NOFAIL;
- page = find_or_create_page(inode->i_mapping, index, gfp_mask);
-
- BUG_ON(!PageLocked(page));
+ folio = __filemap_get_folio(inode->i_mapping, index,
+ FGP_LOCK | FGP_ACCESSED | FGP_CREAT, gfp_mask);
- if (page_has_buffers(page)) {
- bh = page_buffers(page);
+ bh = folio_buffers(folio);
+ if (bh) {
if (bh->b_size == size) {
- end_block = init_page_buffers(page, bdev,
- (sector_t)index << sizebits,
- size);
+ end_block = folio_init_buffers(folio, bdev,
+ (sector_t)index << sizebits, size);
goto done;
}
- if (!try_to_free_buffers(page_folio(page)))
+ if (!try_to_free_buffers(folio))
goto failed;
}
- /*
- * Allocate some buffers for this page
- */
- bh = alloc_page_buffers(page, size, true);
+ bh = folio_alloc_buffers(folio, size, true);
/*
- * Link the page to the buffers and initialise them. Take the
+ * Link the folio to the buffers and initialise them. Take the
* lock to be atomic wrt __find_get_block(), which does not
- * run under the page lock.
+ * run under the folio lock.
*/
spin_lock(&inode->i_mapping->private_lock);
- link_dev_buffers(page, bh);
- end_block = init_page_buffers(page, bdev, (sector_t)index << sizebits,
- size);
+ link_dev_buffers(folio, bh);
+ end_block = folio_init_buffers(folio, bdev,
+ (sector_t)index << sizebits, size);
spin_unlock(&inode->i_mapping->private_lock);
done:
ret = (block < end_block) ? 1 : -ENXIO;
failed:
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
return ret;
}
* WB_SYNC_ALL, the writes are posted using REQ_SYNC; this
* causes the writes to be flagged as synchronous writes.
*/
-int __block_write_full_page(struct inode *inode, struct page *page,
+int __block_write_full_folio(struct inode *inode, struct folio *folio,
get_block_t *get_block, struct writeback_control *wbc,
bh_end_io_t *handler)
{
int nr_underway = 0;
blk_opf_t write_flags = wbc_to_write_flags(wbc);
- head = folio_create_buffers(page_folio(page), inode,
+ head = folio_create_buffers(folio, inode,
(1 << BH_Dirty) | (1 << BH_Uptodate));
/*
* 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.
+ * then we just miss that fact, and the folio stays dirty.
*
* Buffers outside i_size may be dirtied by block_dirty_folio;
* handle that here by just cleaning them.
blocksize = bh->b_size;
bbits = block_size_bits(blocksize);
- block = (sector_t)page->index << (PAGE_SHIFT - bbits);
+ block = (sector_t)folio->index << (PAGE_SHIFT - bbits);
last_block = (i_size_read(inode) - 1) >> bbits;
/*
if (block > last_block) {
/*
* mapped buffers outside i_size will occur, because
- * this page can be outside i_size when there is a
+ * this folio can be outside i_size when there is a
* truncate in progress.
*/
/*
continue;
/*
* If it's a fully non-blocking write attempt and we cannot
- * lock the buffer then redirty the page. Note that this can
+ * lock the buffer then redirty the folio. Note that this can
* potentially cause a busy-wait loop from writeback threads
* and kswapd activity, but those code paths have their own
* higher-level throttling.
if (wbc->sync_mode != WB_SYNC_NONE) {
lock_buffer(bh);
} else if (!trylock_buffer(bh)) {
- redirty_page_for_writepage(wbc, page);
+ folio_redirty_for_writepage(wbc, folio);
continue;
}
if (test_clear_buffer_dirty(bh)) {
} while ((bh = bh->b_this_page) != head);
/*
- * The page and its buffers are protected by PageWriteback(), so we can
- * drop the bh refcounts early.
+ * The folio and its buffers are protected by the writeback flag,
+ * so we can drop the bh refcounts early.
*/
- BUG_ON(PageWriteback(page));
- set_page_writeback(page);
+ BUG_ON(folio_test_writeback(folio));
+ folio_start_writeback(folio);
do {
struct buffer_head *next = bh->b_this_page;
}
bh = next;
} while (bh != head);
- unlock_page(page);
+ folio_unlock(folio);
err = 0;
done:
if (nr_underway == 0) {
/*
- * The page was marked dirty, but the buffers were
+ * The folio was marked dirty, but the buffers were
* clean. Someone wrote them back by hand with
* write_dirty_buffer/submit_bh. A rare case.
*/
- end_page_writeback(page);
+ folio_end_writeback(folio);
/*
- * The page and buffer_heads can be released at any time from
+ * The folio and buffer_heads can be released at any time from
* here on.
*/
}
* ENOSPC, or some other error. We may already have added some
* blocks to the file, so we need to write these out to avoid
* exposing stale data.
- * The page is currently locked and not marked for writeback
+ * The folio is currently locked and not marked for writeback
*/
bh = head;
/* Recovery: lock and submit the mapped buffers */
} else {
/*
* The buffer may have been set dirty during
- * attachment to a dirty page.
+ * attachment to a dirty folio.
*/
clear_buffer_dirty(bh);
}
} while ((bh = bh->b_this_page) != head);
- SetPageError(page);
- BUG_ON(PageWriteback(page));
- mapping_set_error(page->mapping, err);
- set_page_writeback(page);
+ folio_set_error(folio);
+ BUG_ON(folio_test_writeback(folio));
+ mapping_set_error(folio->mapping, err);
+ folio_start_writeback(folio);
do {
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
}
bh = next;
} while (bh != head);
- unlock_page(page);
+ folio_unlock(folio);
goto done;
}
-EXPORT_SYMBOL(__block_write_full_page);
+EXPORT_SYMBOL(__block_write_full_folio);
/*
- * If a page has any new buffers, zero them out here, and mark them uptodate
+ * If a folio has any new buffers, zero them out here, and mark them uptodate
* and dirty so they'll be written out (in order to prevent uninitialised
* block data from leaking). And clear the new bit.
*/
-void page_zero_new_buffers(struct page *page, unsigned from, unsigned to)
+void folio_zero_new_buffers(struct folio *folio, size_t from, size_t to)
{
- unsigned int block_start, block_end;
+ size_t block_start, block_end;
struct buffer_head *head, *bh;
- BUG_ON(!PageLocked(page));
- if (!page_has_buffers(page))
+ BUG_ON(!folio_test_locked(folio));
+ head = folio_buffers(folio);
+ if (!head)
return;
- bh = head = page_buffers(page);
+ bh = head;
block_start = 0;
do {
block_end = block_start + bh->b_size;
if (buffer_new(bh)) {
if (block_end > from && block_start < to) {
- if (!PageUptodate(page)) {
- unsigned start, size;
+ if (!folio_test_uptodate(folio)) {
+ size_t start, xend;
start = max(from, block_start);
- size = min(to, block_end) - start;
+ xend = min(to, block_end);
- zero_user(page, start, size);
+ folio_zero_segment(folio, start, xend);
set_buffer_uptodate(bh);
}
bh = bh->b_this_page;
} while (bh != head);
}
-EXPORT_SYMBOL(page_zero_new_buffers);
+EXPORT_SYMBOL(folio_zero_new_buffers);
static void
iomap_to_bh(struct inode *inode, sector_t block, struct buffer_head *bh,
err = -EIO;
}
if (unlikely(err))
- page_zero_new_buffers(&folio->page, from, to);
+ folio_zero_new_buffers(folio, from, to);
return err;
}
}
EXPORT_SYMBOL(__block_write_begin);
-static int __block_commit_write(struct inode *inode, struct page *page,
- unsigned from, unsigned to)
+static int __block_commit_write(struct inode *inode, struct folio *folio,
+ size_t from, size_t to)
{
- unsigned block_start, block_end;
- int partial = 0;
+ size_t block_start, block_end;
+ bool partial = false;
unsigned blocksize;
struct buffer_head *bh, *head;
- bh = head = page_buffers(page);
+ bh = head = folio_buffers(folio);
blocksize = bh->b_size;
block_start = 0;
block_end = block_start + blocksize;
if (block_end <= from || block_start >= to) {
if (!buffer_uptodate(bh))
- partial = 1;
+ partial = true;
} else {
set_buffer_uptodate(bh);
mark_buffer_dirty(bh);
/*
* If this is a partial write which happened to make all buffers
* uptodate then we can optimize away a bogus read_folio() for
- * the next read(). Here we 'discover' whether the page went
+ * the next read(). Here we 'discover' whether the folio went
* uptodate as a result of this (potentially partial) write.
*/
if (!partial)
- SetPageUptodate(page);
+ folio_mark_uptodate(folio);
return 0;
}
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
+ struct folio *folio = page_folio(page);
struct inode *inode = mapping->host;
- unsigned start;
-
- start = pos & (PAGE_SIZE - 1);
+ size_t start = pos - folio_pos(folio);
if (unlikely(copied < len)) {
/*
* read_folio might come in and destroy our partial write.
*
* Do the simplest thing, and just treat any short write to a
- * non uptodate page as a zero-length write, and force the
+ * non uptodate folio as a zero-length write, and force the
* caller to redo the whole thing.
*/
- if (!PageUptodate(page))
+ if (!folio_test_uptodate(folio))
copied = 0;
- page_zero_new_buffers(page, start+copied, start+len);
+ folio_zero_new_buffers(folio, start+copied, start+len);
}
- flush_dcache_page(page);
+ flush_dcache_folio(folio);
/* This could be a short (even 0-length) commit */
- __block_commit_write(inode, page, start, start+copied);
+ __block_commit_write(inode, folio, start, start + copied);
return copied;
}
int block_commit_write(struct page *page, unsigned from, unsigned to)
{
- struct inode *inode = page->mapping->host;
- __block_commit_write(inode,page,from,to);
+ struct folio *folio = page_folio(page);
+ struct inode *inode = folio->mapping->host;
+ __block_commit_write(inode, folio, from, to);
return 0;
}
EXPORT_SYMBOL(block_commit_write);
int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
get_block_t get_block)
{
- struct page *page = vmf->page;
+ struct folio *folio = page_folio(vmf->page);
struct inode *inode = file_inode(vma->vm_file);
unsigned long end;
loff_t size;
int ret;
- lock_page(page);
+ folio_lock(folio);
size = i_size_read(inode);
- if ((page->mapping != inode->i_mapping) ||
- (page_offset(page) > size)) {
+ if ((folio->mapping != inode->i_mapping) ||
+ (folio_pos(folio) >= size)) {
/* We overload EFAULT to mean page got truncated */
ret = -EFAULT;
goto out_unlock;
}
- /* page is wholly or partially inside EOF */
- if (((page->index + 1) << PAGE_SHIFT) > size)
- end = size & ~PAGE_MASK;
- else
- end = PAGE_SIZE;
+ end = folio_size(folio);
+ /* folio is wholly or partially inside EOF */
+ if (folio_pos(folio) + end > size)
+ end = size - folio_pos(folio);
- ret = __block_write_begin(page, 0, end, get_block);
+ ret = __block_write_begin_int(folio, 0, end, get_block, NULL);
if (!ret)
- ret = block_commit_write(page, 0, end);
+ ret = __block_commit_write(inode, folio, 0, end);
if (unlikely(ret < 0))
goto out_unlock;
- set_page_dirty(page);
- wait_for_stable_page(page);
+ folio_mark_dirty(folio);
+ folio_wait_stable(folio);
return 0;
out_unlock:
- unlock_page(page);
+ folio_unlock(folio);
return ret;
}
EXPORT_SYMBOL(block_page_mkwrite);
loff_t from, get_block_t *get_block)
{
pgoff_t index = from >> PAGE_SHIFT;
- unsigned offset = from & (PAGE_SIZE-1);
unsigned blocksize;
sector_t iblock;
- unsigned length, pos;
+ size_t offset, length, pos;
struct inode *inode = mapping->host;
- struct page *page;
+ struct folio *folio;
struct buffer_head *bh;
int err = 0;
blocksize = i_blocksize(inode);
- length = offset & (blocksize - 1);
+ length = from & (blocksize - 1);
/* Block boundary? Nothing to do */
if (!length)
length = blocksize - length;
iblock = (sector_t)index << (PAGE_SHIFT - inode->i_blkbits);
- page = grab_cache_page(mapping, index);
- if (!page)
- return -ENOMEM;
+ folio = filemap_grab_folio(mapping, index);
+ if (IS_ERR(folio))
+ return PTR_ERR(folio);
- if (!page_has_buffers(page))
- create_empty_buffers(page, blocksize, 0);
+ bh = folio_buffers(folio);
+ if (!bh) {
+ folio_create_empty_buffers(folio, blocksize, 0);
+ bh = folio_buffers(folio);
+ }
/* Find the buffer that contains "offset" */
- bh = page_buffers(page);
+ offset = offset_in_folio(folio, from);
pos = blocksize;
while (offset >= pos) {
bh = bh->b_this_page;
}
/* Ok, it's mapped. Make sure it's up-to-date */
- if (PageUptodate(page))
+ if (folio_test_uptodate(folio))
set_buffer_uptodate(bh);
if (!buffer_uptodate(bh) && !buffer_delay(bh) && !buffer_unwritten(bh)) {
goto unlock;
}
- zero_user(page, offset, length);
+ folio_zero_range(folio, offset, length);
mark_buffer_dirty(bh);
unlock:
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
return err;
}
int block_write_full_page(struct page *page, get_block_t *get_block,
struct writeback_control *wbc)
{
- struct inode * const inode = page->mapping->host;
+ struct folio *folio = page_folio(page);
+ struct inode * const inode = folio->mapping->host;
loff_t i_size = i_size_read(inode);
- const pgoff_t end_index = i_size >> PAGE_SHIFT;
- unsigned offset;
- /* Is the page fully inside i_size? */
- if (page->index < end_index)
- return __block_write_full_page(inode, page, get_block, wbc,
+ /* Is the folio fully inside i_size? */
+ if (folio_pos(folio) + folio_size(folio) <= i_size)
+ return __block_write_full_folio(inode, folio, get_block, wbc,
end_buffer_async_write);
- /* Is the page fully outside i_size? (truncate in progress) */
- offset = i_size & (PAGE_SIZE-1);
- if (page->index >= end_index+1 || !offset) {
- unlock_page(page);
+ /* Is the folio fully outside i_size? (truncate in progress) */
+ if (folio_pos(folio) >= i_size) {
+ folio_unlock(folio);
return 0; /* don't care */
}
/*
- * The page straddles i_size. It must be zeroed out on each and every
+ * The folio straddles i_size. It must be zeroed out on each and every
* writepage invocation because it may be mmapped. "A file is mapped
* in multiples of the page size. For a file that is not a multiple of
- * the page size, the remaining memory is zeroed when mapped, and
+ * the page size, the remaining memory is zeroed when mapped, and
* writes to that region are not written out to the file."
*/
- zero_user_segment(page, offset, PAGE_SIZE);
- return __block_write_full_page(inode, page, get_block, wbc,
- end_buffer_async_write);
+ folio_zero_segment(folio, offset_in_folio(folio, i_size),
+ folio_size(folio));
+ return __block_write_full_folio(inode, folio, get_block, wbc,
+ end_buffer_async_write);
}
EXPORT_SYMBOL(block_write_full_page);
bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
- bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh));
- BUG_ON(bio->bi_iter.bi_size != bh->b_size);
+ __bio_add_page(bio, bh->b_page, bh->b_size, bh_offset(bh));
bio->bi_end_io = end_bio_bh_io_sync;
bio->bi_private = bh;
projects / platform / kernel / linux-starfive.git / blobdiff