* calls into generic code.
*/
static noinline int btrfs_copy_from_user(loff_t pos, size_t write_bytes,
- struct page *page, struct iov_iter *i)
+ struct folio *folio, struct iov_iter *i)
{
size_t copied = 0;
size_t total_copied = 0;
/*
* Copy data from userspace to the current page
*/
- copied = copy_page_from_iter_atomic(page, offset, count, i);
+ copied = copy_folio_from_iter_atomic(folio, offset, count, i);
/* Flush processor's dcache for this page */
- flush_dcache_page(page);
+ flush_dcache_folio(folio);
/*
* if we get a partial write, we can end up with
* back to page at a time copies after we return 0.
*/
if (unlikely(copied < count)) {
- if (!PageUptodate(page)) {
+ if (!folio_test_uptodate(folio)) {
iov_iter_revert(i, copied);
copied = 0;
}
}
/*
- * unlocks pages after btrfs_file_write is done with them
+ * Unlock folio after btrfs_file_write() is done with it.
*/
-static void btrfs_drop_page(struct btrfs_fs_info *fs_info, struct page *page,
- u64 pos, u64 copied)
+static void btrfs_drop_folio(struct btrfs_fs_info *fs_info, struct folio *folio,
+ u64 pos, u64 copied)
{
u64 block_start = round_down(pos, fs_info->sectorsize);
u64 block_len = round_up(pos + copied, fs_info->sectorsize) - block_start;
ASSERT(block_len <= U32_MAX);
/*
- * Page checked is some magic around finding pages that have been
- * modified without going through btrfs_set_page_dirty clear it here.
+ * Folio checked is some magic around finding folios that have been
+ * modified without going through btrfs_dirty_folio(). Clear it here.
* There should be no need to mark the pages accessed as
- * prepare_one_page() should have marked them accessed in
- * prepare_one_page() via find_or_create_page()
+ * prepare_one_folio() should have marked them accessed in
+ * prepare_one_folio() via find_or_create_page()
*/
- btrfs_folio_clamp_clear_checked(fs_info, page_folio(page), block_start,
- block_len);
- unlock_page(page);
- put_page(page);
+ btrfs_folio_clamp_clear_checked(fs_info, folio, block_start, block_len);
+ folio_unlock(folio);
+ folio_put(folio);
}
/*
* After btrfs_copy_from_user(), update the following things for delalloc:
- * - Mark newly dirtied pages as DELALLOC in the io tree.
+ * - Mark newly dirtied folio as DELALLOC in the io tree.
* Used to advise which range is to be written back.
- * - Mark modified pages as Uptodate/Dirty and not needing COW fixup
+ * - Mark modified folio as Uptodate/Dirty and not needing COW fixup
* - Update inode size for past EOF write
*/
-int btrfs_dirty_page(struct btrfs_inode *inode, struct page *page, loff_t pos,
- size_t write_bytes, struct extent_state **cached, bool noreserve)
+int btrfs_dirty_folio(struct btrfs_inode *inode, struct folio *folio, loff_t pos,
+ size_t write_bytes, struct extent_state **cached, bool noreserve)
{
struct btrfs_fs_info *fs_info = inode->root->fs_info;
int ret = 0;
u64 start_pos;
u64 end_of_last_block;
u64 end_pos = pos + write_bytes;
- struct folio *folio = page_folio(page);
loff_t isize = i_size_read(&inode->vfs_inode);
unsigned int extra_bits = 0;
}
/*
- * on error we return an unlocked page and the error value
- * on success we return a locked page and 0
+ * On error return an unlocked folio and the error value
+ * On success return a locked folio and 0
*/
-static int prepare_uptodate_page(struct inode *inode,
- struct page *page, u64 pos,
- u64 len, bool force_uptodate)
+static int prepare_uptodate_folio(struct inode *inode, struct folio *folio, u64 pos,
+ u64 len, bool force_uptodate)
{
- struct folio *folio = page_folio(page);
u64 clamp_start = max_t(u64, pos, folio_pos(folio));
u64 clamp_end = min_t(u64, pos + len, folio_pos(folio) + folio_size(folio));
int ret = 0;
* The private flag check is essential for subpage as we need to store
* extra bitmap using folio private.
*/
- if (page->mapping != inode->i_mapping || !folio_test_private(folio)) {
+ if (folio->mapping != inode->i_mapping || !folio_test_private(folio)) {
folio_unlock(folio);
return -EAGAIN;
}
return 0;
}
-static fgf_t get_prepare_fgp_flags(bool nowait)
-{
- fgf_t fgp_flags = FGP_LOCK | FGP_ACCESSED | FGP_CREAT;
-
- if (nowait)
- fgp_flags |= FGP_NOWAIT;
-
- return fgp_flags;
-}
-
static gfp_t get_prepare_gfp_flags(struct inode *inode, bool nowait)
{
gfp_t gfp;
}
/*
- * this just gets page into the page cache and locks them down.
+ * Get folio into the page cache and lock it.
*/
-static noinline int prepare_one_page(struct inode *inode, struct page **page_ret,
- loff_t pos, size_t write_bytes,
- bool force_uptodate, bool nowait)
+static noinline int prepare_one_folio(struct inode *inode, struct folio **folio_ret,
+ loff_t pos, size_t write_bytes,
+ bool force_uptodate, bool nowait)
{
unsigned long index = pos >> PAGE_SHIFT;
gfp_t mask = get_prepare_gfp_flags(inode, nowait);
- fgf_t fgp_flags = get_prepare_fgp_flags(nowait);
- struct page *page;
+ fgf_t fgp_flags = (nowait ? FGP_WRITEBEGIN | FGP_NOWAIT : FGP_WRITEBEGIN);
+ struct folio *folio;
int ret = 0;
again:
- page = pagecache_get_page(inode->i_mapping, index, fgp_flags,
- mask | __GFP_WRITE);
- if (!page) {
+ folio = __filemap_get_folio(inode->i_mapping, index, fgp_flags, mask);
+ if (IS_ERR(folio)) {
if (nowait)
ret = -EAGAIN;
else
- ret = -ENOMEM;
+ ret = PTR_ERR(folio);
return ret;
}
- ret = set_page_extent_mapped(page);
+ /* Only support page sized folio yet. */
+ ASSERT(folio_order(folio) == 0);
+ ret = set_folio_extent_mapped(folio);
if (ret < 0) {
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
return ret;
}
- ret = prepare_uptodate_page(inode, page, pos, write_bytes, force_uptodate);
+ ret = prepare_uptodate_folio(inode, folio, pos, write_bytes, force_uptodate);
if (ret) {
- /* The page is already unlocked. */
- put_page(page);
+ /* The folio is already unlocked. */
+ folio_put(folio);
if (!nowait && ret == -EAGAIN) {
ret = 0;
goto again;
}
return ret;
}
- wait_on_page_writeback(page);
- *page_ret = page;
+ *folio_ret = folio;
return 0;
}
/*
- * This function locks the extent and properly waits for data=ordered extents
- * to finish before allowing the pages to be modified if need.
+ * Locks the extent and properly waits for data=ordered extents to finish
+ * before allowing the folios to be modified if need.
*
- * The return value:
+ * Return:
* 1 - the extent is locked
* 0 - the extent is not locked, and everything is OK
- * -EAGAIN - need re-prepare the pages
+ * -EAGAIN - need to prepare the folios again
*/
static noinline int
-lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct page *page,
+lock_and_cleanup_extent_if_need(struct btrfs_inode *inode, struct folio *folio,
loff_t pos, size_t write_bytes,
u64 *lockstart, u64 *lockend, bool nowait,
struct extent_state **cached_state)
if (nowait) {
if (!try_lock_extent(&inode->io_tree, start_pos, last_pos,
cached_state)) {
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
return -EAGAIN;
}
} else {
ordered->file_offset <= last_pos) {
unlock_extent(&inode->io_tree, start_pos, last_pos,
cached_state);
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
btrfs_start_ordered_extent(ordered);
btrfs_put_ordered_extent(ordered);
return -EAGAIN;
}
/*
- * We should be called after prepare_one_page() which should have locked
+ * We should be called after prepare_one_folio() which should have locked
* all pages in the range.
*/
- WARN_ON(!PageLocked(page));
+ WARN_ON(!folio_test_locked(folio));
return ret;
}
size_t copied;
size_t dirty_sectors;
size_t num_sectors;
- struct page *page = NULL;
+ struct folio *folio = NULL;
int extents_locked;
bool force_page_uptodate = false;
/*
- * Fault pages before locking them in prepare_one_page()
+ * Fault pages before locking them in prepare_one_folio()
* to avoid recursive lock
*/
if (unlikely(fault_in_iov_iter_readable(i, write_bytes))) {
break;
}
- ret = prepare_one_page(inode, &page, pos, write_bytes,
- force_page_uptodate, false);
+ ret = prepare_one_folio(inode, &folio, pos, write_bytes,
+ force_page_uptodate, false);
if (ret) {
btrfs_delalloc_release_extents(BTRFS_I(inode),
reserve_bytes);
}
extents_locked = lock_and_cleanup_extent_if_need(BTRFS_I(inode),
- page, pos, write_bytes, &lockstart,
+ folio, pos, write_bytes, &lockstart,
&lockend, nowait, &cached_state);
if (extents_locked < 0) {
if (!nowait && extents_locked == -EAGAIN)
break;
}
- copied = btrfs_copy_from_user(pos, write_bytes, page, i);
+ copied = btrfs_copy_from_user(pos, write_bytes, folio, i);
num_sectors = BTRFS_BYTES_TO_BLKS(fs_info, reserve_bytes);
dirty_sectors = round_up(copied + sector_offset,
release_bytes = round_up(copied + sector_offset,
fs_info->sectorsize);
- ret = btrfs_dirty_page(BTRFS_I(inode), page, pos, copied,
- &cached_state, only_release_metadata);
+ ret = btrfs_dirty_folio(BTRFS_I(inode), folio, pos, copied,
+ &cached_state, only_release_metadata);
/*
* If we have not locked the extent range, because the range's
btrfs_delalloc_release_extents(BTRFS_I(inode), reserve_bytes);
if (ret) {
- btrfs_drop_page(fs_info, page, pos, copied);
+ btrfs_drop_folio(fs_info, folio, pos, copied);
break;
}
if (only_release_metadata)
btrfs_check_nocow_unlock(BTRFS_I(inode));
- btrfs_drop_page(fs_info, page, pos, copied);
+ btrfs_drop_folio(fs_info, folio, pos, copied);
cond_resched();
projects / users / hch / misc.git / commitdiff