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Wong" , Matthew Wilcox , Christoph Hellwig , Brian Foster , Andreas Gruenbacher , "Ritesh Harjani (IBM)" , Christoph Hellwig Subject: [PATCHv11 3/8] iomap: Add some uptodate state handling helpers for ifs state bitmap Date: Sat, 1 Jul 2023 13:04:36 +0530 Message-Id: <04ba7f53e55649a908943b6c7c27ef333d47c71f.1688188958.git.ritesh.list@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org 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. Reviewed-by: Christoph Hellwig Signed-off-by: Ritesh Harjani (IBM) Reviewed-by: Darrick J. Wong --- fs/iomap/buffered-io.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 3ff7688b360a..e45368e91eca 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -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; } @@ -1620,7 +1632,7 @@ 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);