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Commit ca99fdd2 authored by Lukas Czerner's avatar Lukas Czerner Committed by Theodore Ts'o
Browse files

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: default avatarLukas Czerner <lczerner@redhat.com>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
parent 259709b0

fs/ext4/inode.c

+19 −11
Original line number Diff line number Diff line
@@ -1416,21 +1416,28 @@ static void ext4_da_release_space(struct inode *inode, int to_free) 
}



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 @@ static void ext4_da_invalidatepage(struct page *page, unsigned int offset, 
	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 @@ ext4_readpages(struct file *file, struct address_space *mapping, 
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 @@ static void ext4_journalled_invalidatepage(struct page *page, 
					   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 @@ static void ext4_wait_for_tail_page_commit(struct inode *inode) 
				      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)

include/trace/events/ext4.h

+12 −10
Original line number Diff line number Diff line
@@ -444,16 +444,16 @@ DEFINE_EVENT(ext4__page_op, ext4_releasepage, 
);



DECLARE_EVENT_CLASS(ext4_invalidatepage_op,

	TP_PROTO(struct page *page, unsigned long offset),

	TP_PROTO(struct page *page, unsigned int offset, unsigned int length),



	TP_ARGS(page, offset),

	TP_ARGS(page, offset, length),



	TP_STRUCT__entry(

		__field(	dev_t,	dev			)

		__field(	ino_t,	ino			)

		__field(	pgoff_t, index			)

		__field(	unsigned long, offset		)



		__field(	unsigned int, offset		)

		__field(	unsigned int, length		)

	),



	TP_fast_assign(
@@ -461,24 +461,26 @@ DECLARE_EVENT_CLASS(ext4_invalidatepage_op, 
		__entry->ino	= page->mapping->host->i_ino;

		__entry->index	= page->index;

		__entry->offset	= offset;

		__entry->length	= length;

	),



	TP_printk("dev %d,%d ino %lu page_index %lu offset %lu",

	TP_printk("dev %d,%d ino %lu page_index %lu offset %u length %u",

		  MAJOR(__entry->dev), MINOR(__entry->dev),

		  (unsigned long) __entry->ino,

		  (unsigned long) __entry->index, __entry->offset)

		  (unsigned long) __entry->index,

		  __entry->offset, __entry->length)

);



DEFINE_EVENT(ext4_invalidatepage_op, ext4_invalidatepage,

	TP_PROTO(struct page *page, unsigned long offset),

	TP_PROTO(struct page *page, unsigned int offset, unsigned int length),



	TP_ARGS(page, offset)

	TP_ARGS(page, offset, length)

);



DEFINE_EVENT(ext4_invalidatepage_op, ext4_journalled_invalidatepage,

	TP_PROTO(struct page *page, unsigned long offset),

	TP_PROTO(struct page *page, unsigned int offset, unsigned int length),



	TP_ARGS(page, offset)

	TP_ARGS(page, offset, length)

);



TRACE_EVENT(ext4_discard_blocks,