Function zio_write

freebsd/contrib/openzfs/module/zfs/zio.c:1125–1168

}

zio_t *
zio_write(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp,
    abd_t *data, uint64_t lsize, uint64_t psize, const zio_prop_t *zp,
    zio_done_func_t *ready, zio_done_func_t *children_ready,
    zio_done_func_t *physdone, zio_done_func_t *done,
    void *private, zio_priority_t priority, enum zio_flag flags,
    const zbookmark_phys_t *zb)
{
	zio_t *zio;

	ASSERT(zp->zp_checksum >= ZIO_CHECKSUM_OFF &&
	    zp->zp_checksum < ZIO_CHECKSUM_FUNCTIONS &&
	    zp->zp_compress >= ZIO_COMPRESS_OFF &&
	    zp->zp_compress < ZIO_COMPRESS_FUNCTIONS &&
	    DMU_OT_IS_VALID(zp->zp_type) &&
	    zp->zp_level < 32 &&
	    zp->zp_copies > 0 &&
	    zp->zp_copies <= spa_max_replication(spa));

	zio = zio_create(pio, spa, txg, bp, data, lsize, psize, done, private,
	    ZIO_TYPE_WRITE, priority, flags, NULL, 0, zb,
	    ZIO_STAGE_OPEN, (flags & ZIO_FLAG_DDT_CHILD) ?
	    ZIO_DDT_CHILD_WRITE_PIPELINE : ZIO_WRITE_PIPELINE);

	zio->io_ready = ready;
	zio->io_children_ready = children_ready;
	zio->io_physdone = physdone;
	zio->io_prop = *zp;

	/*
	 * Data can be NULL if we are going to call zio_write_override() to
	 * provide the already-allocated BP.  But we may need the data to
	 * verify a dedup hit (if requested).  In this case, don't try to
	 * dedup (just take the already-allocated BP verbatim). Encrypted
	 * dedup blocks need data as well so we also disable dedup in this
	 * case.
	 */
	if (data == NULL &&
	    (zio->io_prop.zp_dedup_verify || zio->io_prop.zp_encrypt)) {
		zio->io_prop.zp_dedup = zio->io_prop.zp_dedup_verify = B_FALSE;
	}

	return (zio);
}

zio_t *
zio_rewrite(zio_t *pio, spa_t *spa, uint64_t txg, blkptr_t *bp, abd_t *data,