ext4: use ->invalidatepage() length argument
->invalidatepage() aop now accepts range to invalidate so we can make
use of it in all ext4 invalidatepage routines.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 694645e..11638d7 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1416,21 +1416,28 @@
}
static void ext4_da_page_release_reservation(struct page *page,
- unsigned long offset)
+ unsigned int offset,
+ unsigned int length)
{
int to_release = 0;
struct buffer_head *head, *bh;
unsigned int curr_off = 0;
struct inode *inode = page->mapping->host;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ unsigned int stop = offset + length;
int num_clusters;
ext4_fsblk_t lblk;
+ BUG_ON(stop > PAGE_CACHE_SIZE || stop < length);
+
head = page_buffers(page);
bh = head;
do {
unsigned int next_off = curr_off + bh->b_size;
+ if (next_off > stop)
+ break;
+
if ((offset <= curr_off) && (buffer_delay(bh))) {
to_release++;
clear_buffer_delay(bh);
@@ -2840,7 +2847,7 @@
if (!page_has_buffers(page))
goto out;
- ext4_da_page_release_reservation(page, offset);
+ ext4_da_page_release_reservation(page, offset, length);
out:
ext4_invalidatepage(page, offset, length);
@@ -2994,29 +3001,29 @@
static void ext4_invalidatepage(struct page *page, unsigned int offset,
unsigned int length)
{
- trace_ext4_invalidatepage(page, offset);
+ trace_ext4_invalidatepage(page, offset, length);
/* No journalling happens on data buffers when this function is used */
WARN_ON(page_has_buffers(page) && buffer_jbd(page_buffers(page)));
- block_invalidatepage(page, offset, PAGE_CACHE_SIZE - offset);
+ block_invalidatepage(page, offset, length);
}
static int __ext4_journalled_invalidatepage(struct page *page,
- unsigned long offset)
+ unsigned int offset,
+ unsigned int length)
{
journal_t *journal = EXT4_JOURNAL(page->mapping->host);
- trace_ext4_journalled_invalidatepage(page, offset);
+ trace_ext4_journalled_invalidatepage(page, offset, length);
/*
* If it's a full truncate we just forget about the pending dirtying
*/
- if (offset == 0)
+ if (offset == 0 && length == PAGE_CACHE_SIZE)
ClearPageChecked(page);
- return jbd2_journal_invalidatepage(journal, page, offset,
- PAGE_CACHE_SIZE - offset);
+ return jbd2_journal_invalidatepage(journal, page, offset, length);
}
/* Wrapper for aops... */
@@ -3024,7 +3031,7 @@
unsigned int offset,
unsigned int length)
{
- WARN_ON(__ext4_journalled_invalidatepage(page, offset) < 0);
+ WARN_ON(__ext4_journalled_invalidatepage(page, offset, length) < 0);
}
static int ext4_releasepage(struct page *page, gfp_t wait)
@@ -4628,7 +4635,8 @@
inode->i_size >> PAGE_CACHE_SHIFT);
if (!page)
return;
- ret = __ext4_journalled_invalidatepage(page, offset);
+ ret = __ext4_journalled_invalidatepage(page, offset,
+ PAGE_CACHE_SIZE - offset);
unlock_page(page);
page_cache_release(page);
if (ret != -EBUSY)