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Diffstat (limited to 'fs/nilfs2/page.c')
-rw-r--r--fs/nilfs2/page.c93
1 files changed, 53 insertions, 40 deletions
diff --git a/fs/nilfs2/page.c b/fs/nilfs2/page.c
index 14e470fb8870..806b056d2260 100644
--- a/fs/nilfs2/page.c
+++ b/fs/nilfs2/page.c
@@ -39,7 +39,6 @@ static struct buffer_head *__nilfs_get_folio_block(struct folio *folio,
first_block = (unsigned long)index << (PAGE_SHIFT - blkbits);
bh = get_nth_bh(bh, block - first_block);
- touch_buffer(bh);
wait_on_buffer(bh);
return bh;
}
@@ -64,6 +63,7 @@ struct buffer_head *nilfs_grab_buffer(struct inode *inode,
folio_put(folio);
return NULL;
}
+ bh->b_bdev = inode->i_sb->s_bdev;
return bh;
}
@@ -77,7 +77,8 @@ void nilfs_forget_buffer(struct buffer_head *bh)
const unsigned long clear_bits =
(BIT(BH_Uptodate) | BIT(BH_Dirty) | BIT(BH_Mapped) |
BIT(BH_Async_Write) | BIT(BH_NILFS_Volatile) |
- BIT(BH_NILFS_Checked) | BIT(BH_NILFS_Redirected));
+ BIT(BH_NILFS_Checked) | BIT(BH_NILFS_Redirected) |
+ BIT(BH_Delay));
lock_buffer(bh);
set_mask_bits(&bh->b_state, clear_bits, 0);
@@ -98,16 +99,16 @@ void nilfs_forget_buffer(struct buffer_head *bh)
*/
void nilfs_copy_buffer(struct buffer_head *dbh, struct buffer_head *sbh)
{
- void *kaddr0, *kaddr1;
+ void *saddr, *daddr;
unsigned long bits;
- struct page *spage = sbh->b_page, *dpage = dbh->b_page;
+ struct folio *sfolio = sbh->b_folio, *dfolio = dbh->b_folio;
struct buffer_head *bh;
- kaddr0 = kmap_local_page(spage);
- kaddr1 = kmap_local_page(dpage);
- memcpy(kaddr1 + bh_offset(dbh), kaddr0 + bh_offset(sbh), sbh->b_size);
- kunmap_local(kaddr1);
- kunmap_local(kaddr0);
+ saddr = kmap_local_folio(sfolio, bh_offset(sbh));
+ daddr = kmap_local_folio(dfolio, bh_offset(dbh));
+ memcpy(daddr, saddr, sbh->b_size);
+ kunmap_local(daddr);
+ kunmap_local(saddr);
dbh->b_state = sbh->b_state & NILFS_BUFFER_INHERENT_BITS;
dbh->b_blocknr = sbh->b_blocknr;
@@ -121,21 +122,20 @@ void nilfs_copy_buffer(struct buffer_head *dbh, struct buffer_head *sbh)
unlock_buffer(bh);
}
if (bits & BIT(BH_Uptodate))
- SetPageUptodate(dpage);
+ folio_mark_uptodate(dfolio);
else
- ClearPageUptodate(dpage);
+ folio_clear_uptodate(dfolio);
if (bits & BIT(BH_Mapped))
- SetPageMappedToDisk(dpage);
+ folio_set_mappedtodisk(dfolio);
else
- ClearPageMappedToDisk(dpage);
+ folio_clear_mappedtodisk(dfolio);
}
/**
* nilfs_folio_buffers_clean - Check if a folio has dirty buffers or not.
* @folio: Folio to be checked.
*
- * nilfs_folio_buffers_clean() returns false if the folio has dirty buffers.
- * Otherwise, it returns true.
+ * Return: false if the folio has dirty buffers, true otherwise.
*/
bool nilfs_folio_buffers_clean(struct folio *folio)
{
@@ -262,7 +262,7 @@ repeat:
NILFS_FOLIO_BUG(folio, "inconsistent dirty state");
dfolio = filemap_grab_folio(dmap, folio->index);
- if (unlikely(IS_ERR(dfolio))) {
+ if (IS_ERR(dfolio)) {
/* No empty page is added to the page cache */
folio_unlock(folio);
err = PTR_ERR(dfolio);
@@ -357,9 +357,8 @@ repeat:
/**
* 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)
+void nilfs_clear_dirty_pages(struct address_space *mapping)
{
struct folio_batch fbatch;
unsigned int i;
@@ -380,7 +379,7 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
* was acquired. Skip processing in that case.
*/
if (likely(folio->mapping == mapping))
- nilfs_clear_folio_dirty(folio, silent);
+ nilfs_clear_folio_dirty(folio);
folio_unlock(folio);
}
@@ -392,54 +391,67 @@ void nilfs_clear_dirty_pages(struct address_space *mapping, bool silent)
/**
* nilfs_clear_folio_dirty - discard dirty folio
* @folio: dirty folio that will be discarded
- * @silent: suppress [true] or print [false] warning messages
+ *
+ * nilfs_clear_folio_dirty() clears working states including dirty state for
+ * the folio and its buffers. If the folio has buffers, clear only if it is
+ * confirmed that none of the buffer heads are busy (none have valid
+ * references and none are locked).
*/
-void nilfs_clear_folio_dirty(struct folio *folio, bool silent)
+void nilfs_clear_folio_dirty(struct folio *folio)
{
- struct inode *inode = folio->mapping->host;
- struct super_block *sb = inode->i_sb;
struct buffer_head *bh, *head;
BUG_ON(!folio_test_locked(folio));
- if (!silent)
- nilfs_warn(sb, "discard dirty page: offset=%lld, ino=%lu",
- folio_pos(folio), inode->i_ino);
-
- folio_clear_uptodate(folio);
- folio_clear_mappedtodisk(folio);
-
head = folio_buffers(folio);
if (head) {
const unsigned long clear_bits =
(BIT(BH_Uptodate) | BIT(BH_Dirty) | BIT(BH_Mapped) |
BIT(BH_Async_Write) | BIT(BH_NILFS_Volatile) |
- BIT(BH_NILFS_Checked) | BIT(BH_NILFS_Redirected));
+ BIT(BH_NILFS_Checked) | BIT(BH_NILFS_Redirected) |
+ BIT(BH_Delay));
+ bool busy, invalidated = false;
+recheck_buffers:
+ busy = false;
bh = head;
do {
- lock_buffer(bh);
- if (!silent)
- nilfs_warn(sb,
- "discard dirty block: blocknr=%llu, size=%zu",
- (u64)bh->b_blocknr, bh->b_size);
+ if (atomic_read(&bh->b_count) | buffer_locked(bh)) {
+ busy = true;
+ break;
+ }
+ } while (bh = bh->b_this_page, bh != head);
+ if (busy) {
+ if (invalidated)
+ return;
+ invalidate_bh_lrus();
+ invalidated = true;
+ goto recheck_buffers;
+ }
+
+ bh = head;
+ do {
+ lock_buffer(bh);
set_mask_bits(&bh->b_state, clear_bits, 0);
unlock_buffer(bh);
} while (bh = bh->b_this_page, bh != head);
}
+ folio_clear_uptodate(folio);
+ folio_clear_mappedtodisk(folio);
+ folio_clear_checked(folio);
__nilfs_clear_folio_dirty(folio);
}
-unsigned int nilfs_page_count_clean_buffers(struct page *page,
+unsigned int nilfs_page_count_clean_buffers(struct folio *folio,
unsigned int from, unsigned int to)
{
unsigned int block_start, block_end;
struct buffer_head *bh, *head;
unsigned int nc = 0;
- for (bh = head = page_buffers(page), block_start = 0;
+ for (bh = head = folio_buffers(folio), block_start = 0;
bh != head || !block_start;
block_start = block_end, bh = bh->b_this_page) {
block_end = block_start + bh->b_size;
@@ -487,8 +499,9 @@ void __nilfs_clear_folio_dirty(struct folio *folio)
* This function searches an extent of buffers marked "delayed" which
* starts from a block offset equal to or larger than @start_blk. If
* such an extent was found, this will store the start offset in
- * @blkoff and return its length in blocks. Otherwise, zero is
- * returned.
+ * @blkoff and return its length in blocks.
+ *
+ * Return: Length in blocks of found extent, 0 otherwise.
*/
unsigned long nilfs_find_uncommitted_extent(struct inode *inode,
sector_t start_blk,
generated by cgit (git 2.34.1) at 2025-07-23 21:50:57 +0000