From c4a13ba483f08a81aa47479d2f763a470d95b2b0 Mon Sep 17 00:00:00 2001 From: Rob Norris Date: Tue, 9 Jan 2024 12:29:19 +1100 Subject: [PATCH] vdev_disk: make read/write IO function configurable This is just setting up for the next couple of commits, which will add a new IO function and a parameter to select it. Reviewed-by: Alexander Motin Reviewed-by: Brian Behlendorf Signed-off-by: Rob Norris Sponsored-by: Klara, Inc. Sponsored-by: Wasabi Technology, Inc. Closes #15533 Closes #15588 --- module/os/linux/zfs/vdev_disk.c | 23 +++++++++++++++++++++-- 1 file changed, 21 insertions(+), 2 deletions(-) diff --git a/module/os/linux/zfs/vdev_disk.c b/module/os/linux/zfs/vdev_disk.c index 51e7cef2f..de4dba72f 100644 --- a/module/os/linux/zfs/vdev_disk.c +++ b/module/os/linux/zfs/vdev_disk.c @@ -946,6 +946,8 @@ vdev_disk_io_trim(zio_t *zio) #endif } +int (*vdev_disk_io_rw_fn)(zio_t *zio) = NULL; + static void vdev_disk_io_start(zio_t *zio) { @@ -1029,7 +1031,7 @@ vdev_disk_io_start(zio_t *zio) case ZIO_TYPE_READ: case ZIO_TYPE_WRITE: zio->io_target_timestamp = zio_handle_io_delay(zio); - error = vdev_classic_physio(zio); + error = vdev_disk_io_rw_fn(zio); rw_exit(&vd->vd_lock); if (error) { zio->io_error = error; @@ -1102,8 +1104,25 @@ vdev_disk_rele(vdev_t *vd) /* XXX: Implement me as a vnode rele for the device */ } +/* + * At first use vdev use, set the submission function from the default value if + * it hasn't been set already. + */ +static int +vdev_disk_init(spa_t *spa, nvlist_t *nv, void **tsd) +{ + (void) spa; + (void) nv; + (void) tsd; + + if (vdev_disk_io_rw_fn == NULL) + vdev_disk_io_rw_fn = vdev_classic_physio; + + return (0); +} + vdev_ops_t vdev_disk_ops = { - .vdev_op_init = NULL, + .vdev_op_init = vdev_disk_init, .vdev_op_fini = NULL, .vdev_op_open = vdev_disk_open, .vdev_op_close = vdev_disk_close,