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-rw-r--r--fs/nilfs2/page.c70
1 files changed, 52 insertions, 18 deletions
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 07f76db04ec7..0ba679866e50 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -370,7 +370,12 @@ repeat:
goto repeat;
}
-void nilfs_clear_dirty_pages(struct address_space *mapping)
+/**
+ * nilfs_clear_dirty_pages - discard dirty pages in address space
+ * @mapping: address space with dirty pages for discarding
+ * @silent: suppress [true] or print [false] warning messages
+ */
+void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
{
struct pagevec pvec;
unsigned int i;
@@ -382,25 +387,9 @@ void nilfs_clear_dirty_pages(struct address_space *mapping)
PAGEVEC_SIZE)) {
for (i = 0; i < pagevec_count(&pvec); i++) {
struct page *page = pvec.pages[i];
- struct buffer_head *bh, *head;
lock_page(page);
- ClearPageUptodate(page);
- ClearPageMappedToDisk(page);
- bh = head = page_buffers(page);
- do {
- lock_buffer(bh);
- clear_buffer_dirty(bh);
- clear_buffer_nilfs_volatile(bh);
- clear_buffer_nilfs_checked(bh);
- clear_buffer_nilfs_redirected(bh);
- clear_buffer_uptodate(bh);
- clear_buffer_mapped(bh);
- unlock_buffer(bh);
- bh = bh->b_this_page;
- } while (bh != head);
-
- __nilfs_clear_page_dirty(page);
+ nilfs_clear_dirty_page(page, silent);
unlock_page(page);
}
pagevec_release(&pvec);
@@ -408,6 +397,51 @@ void nilfs_clear_dirty_pages(struct address_space *mapping)
}
}
+/**
+ * nilfs_clear_dirty_page - discard dirty page
+ * @page: dirty page that will be discarded
+ * @silent: suppress [true] or print [false] warning messages
+ */
+void nilfs_clear_dirty_page(struct page *page, bool silent)
+{
+ struct inode *inode = page->mapping->host;
+ struct super_block *sb = inode->i_sb;
+
+ BUG_ON(!PageLocked(page));
+
+ if (!silent) {
+ nilfs_warning(sb, __func__,
+ "discard page: offset %lld, ino %lu",
+ page_offset(page), inode->i_ino);
+ }
+
+ ClearPageUptodate(page);
+ ClearPageMappedToDisk(page);
+
+ if (page_has_buffers(page)) {
+ struct buffer_head *bh, *head;
+
+ bh = head = page_buffers(page);
+ do {
+ lock_buffer(bh);
+ if (!silent) {
+ nilfs_warning(sb, __func__,
+ "discard block %llu, size %zu",
+ (u64)bh->b_blocknr, bh->b_size);
+ }
+ clear_buffer_dirty(bh);
+ clear_buffer_nilfs_volatile(bh);
+ clear_buffer_nilfs_checked(bh);
+ clear_buffer_nilfs_redirected(bh);
+ clear_buffer_uptodate(bh);
+ clear_buffer_mapped(bh);
+ unlock_buffer(bh);
+ } while (bh = bh->b_this_page, bh != head);
+ }
+
+ __nilfs_clear_page_dirty(page);
+}
+
unsigned nilfs_page_count_clean_buffers(struct page *page,
unsigned from, unsigned to)
{