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ext4: support large block size in mpage_map_and_submit_buffers()

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Use the EXT4_PG_TO_LBLK/EXT4_LBLK_TO_PG macros to complete the conversion
between folio indexes and blocks to avoid negative left/right shifts after
supporting blocksize greater than PAGE_SIZE.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Message-ID: <20251121090654.631996-19-libaokun@huaweicloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Baokun Li 2025-11-21 17:06:48 +08:00 committed by Theodore Ts'o
parent bff6235d62
commit b967ab7487
1 changed files with 3 additions and 4 deletions
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7
fs/ext4/inode.c
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@ -2299,15 +2299,14 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)
struct folio_batch fbatch;
unsigned nr, i;
struct inode *inode = mpd->inode;
int bpp_bits = PAGE_SHIFT - inode->i_blkbits;
pgoff_t start, end;
ext4_lblk_t lblk;
ext4_fsblk_t pblock;
int err;
bool map_bh = false;
start = mpd->map.m_lblk >> bpp_bits;
end = (mpd->map.m_lblk + mpd->map.m_len - 1) >> bpp_bits;
start = EXT4_LBLK_TO_PG(inode, mpd->map.m_lblk);
end = EXT4_LBLK_TO_PG(inode, mpd->map.m_lblk + mpd->map.m_len - 1);
pblock = mpd->map.m_pblk;
folio_batch_init(&fbatch);
@ -2318,7 +2317,7 @@ static int mpage_map_and_submit_buffers(struct mpage_da_data *mpd)
for (i = 0; i < nr; i++) {
struct folio *folio = fbatch.folios[i];
lblk = folio->index << bpp_bits;
lblk = EXT4_PG_TO_LBLK(inode, folio->index);
err = mpage_process_folio(mpd, folio, &lblk, &pblock,
&map_bh);
/*