bcachefs: bios must be 512 byte algined

Fixes: 023f9ac9f70f bcachefs: Delete dio read alignment check
Reported-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

diff --git a/fs/bcachefs/fs-io-direct.c b/fs/bcachefs/fs-io-direct.c
index fdd57c5785c9cebf609959fb753ee30e55e85b92..e3b219e19e1008ccfe1ff61e966115795f9c1831 100644 (file)
--- a/fs/bcachefs/fs-io-direct.c
+++ b/fs/bcachefs/fs-io-direct.c
@@ -77,6 +77,10 @@ static int bch2_direct_IO_read(struct kiocb *req, struct iov_iter *iter)
 
        bch2_inode_opts_get(&opts, c, &inode->ei_inode);
 
+       /* bios must be 512 byte aligned: */
+       if ((offset|iter->count) & (SECTOR_SIZE - 1))
+               return -EINVAL;
+
        ret = min_t(loff_t, iter->count,
                    max_t(loff_t, 0, i_size_read(&inode->v) - offset));