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iomap: Add some uptodate state handling helpers for ifs state bitmap

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This patch adds two of the helper routines ifs_is_fully_uptodate()
and ifs_block_is_uptodate() for managing uptodate state of "ifs" state
bitmap.

In later patches ifs state bitmap array will also handle dirty state of all
blocks of a folio. Hence this patch adds some helper routines for handling
uptodate state of the ifs state bitmap.

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Ritesh Harjani (IBM) 2023-07-10 14:12:22 -07:00
parent 3ea5c76cad
commit cc86181a3b
1 changed files with 20 additions and 8 deletions
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28
fs/iomap/buffered-io.c
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@ -36,6 +36,20 @@ struct iomap_folio_state {
static struct bio_set iomap_ioend_bioset;
static inline bool ifs_is_fully_uptodate(struct folio *folio,
struct iomap_folio_state *ifs)
{
struct inode *inode = folio->mapping->host;
return bitmap_full(ifs->state, i_blocks_per_folio(inode, folio));
}
static inline bool ifs_block_is_uptodate(struct iomap_folio_state *ifs,
unsigned int block)
{
return test_bit(block, ifs->state);
}
static void ifs_set_range_uptodate(struct folio *folio,
struct iomap_folio_state *ifs, size_t off, size_t len)
{
@ -47,7 +61,7 @@ static void ifs_set_range_uptodate(struct folio *folio,
spin_lock_irqsave(&ifs->state_lock, flags);
bitmap_set(ifs->state, first_blk, nr_blks);
if (bitmap_full(ifs->state, i_blocks_per_folio(inode, folio)))
if (ifs_is_fully_uptodate(folio, ifs))
folio_mark_uptodate(folio);
spin_unlock_irqrestore(&ifs->state_lock, flags);
}
@ -92,14 +106,12 @@ static struct iomap_folio_state *ifs_alloc(struct inode *inode,
static void ifs_free(struct folio *folio)
{
struct iomap_folio_state *ifs = folio_detach_private(folio);
struct inode *inode = folio->mapping->host;
unsigned int nr_blocks = i_blocks_per_folio(inode, folio);
if (!ifs)
return;
WARN_ON_ONCE(atomic_read(&ifs->read_bytes_pending));
WARN_ON_ONCE(atomic_read(&ifs->write_bytes_pending));
WARN_ON_ONCE(bitmap_full(ifs->state, nr_blocks) !=
WARN_ON_ONCE(ifs_is_fully_uptodate(folio, ifs) !=
folio_test_uptodate(folio));
kfree(ifs);
}
@ -130,7 +142,7 @@ static void iomap_adjust_read_range(struct inode *inode, struct folio *folio,
/* move forward for each leading block marked uptodate */
for (i = first; i <= last; i++) {
if (!test_bit(i, ifs->state))
if (!ifs_block_is_uptodate(ifs, i))
break;
*pos += block_size;
poff += block_size;
@ -140,7 +152,7 @@ static void iomap_adjust_read_range(struct inode *inode, struct folio *folio,
/* truncate len if we find any trailing uptodate block(s) */
for ( ; i <= last; i++) {
if (test_bit(i, ifs->state)) {
if (ifs_block_is_uptodate(ifs, i)) {
plen -= (last - i + 1) * block_size;
last = i - 1;
break;
@ -444,7 +456,7 @@ bool iomap_is_partially_uptodate(struct folio *folio, size_t from, size_t count)
last = (from + count - 1) >> inode->i_blkbits;
for (i = first; i <= last; i++)
if (!test_bit(i, ifs->state))
if (!ifs_block_is_uptodate(ifs, i))
return false;
return true;
}
@ -1621,7 +1633,7 @@ iomap_writepage_map(struct iomap_writepage_ctx *wpc,
* invalid, grab a new one.
*/
for (i = 0; i < nblocks && pos < end_pos; i++, pos += len) {
if (ifs && !test_bit(i, ifs->state))
if (ifs && !ifs_block_is_uptodate(ifs, i))
continue;
error = wpc->ops->map_blocks(wpc, inode, pos);