diff options
Diffstat (limited to 'linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c')
| -rw-r--r-- | linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c b/linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c index 02f90a6803..349ae64d0f 100644 --- a/linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c +++ b/linux-2.6-xen-sparse/drivers/xen/blkback/xenbus.c @@ -20,7 +20,6 @@ #include <stdarg.h> #include <linux/module.h> #include <linux/kthread.h> -#include <xen/xenbus.h> #include "common.h" #undef DPRINTK @@ -91,11 +90,13 @@ static void update_blkif_status(blkif_t *blkif) VBD_SHOW(oo_req, "%d\n", be->blkif->st_oo_req); VBD_SHOW(rd_req, "%d\n", be->blkif->st_rd_req); VBD_SHOW(wr_req, "%d\n", be->blkif->st_wr_req); +VBD_SHOW(br_req, "%d\n", be->blkif->st_br_req); static struct attribute *vbdstat_attrs[] = { &dev_attr_oo_req.attr, &dev_attr_rd_req.attr, &dev_attr_wr_req.attr, + &dev_attr_br_req.attr, NULL }; @@ -165,6 +166,19 @@ static int blkback_remove(struct xenbus_device *dev) return 0; } +int blkback_barrier(struct xenbus_transaction xbt, + struct backend_info *be, int state) +{ + struct xenbus_device *dev = be->dev; + int err; + + err = xenbus_printf(xbt, dev->nodename, "feature-barrier", + "%d", state); + if (err) + xenbus_dev_fatal(dev, err, "writing feature-barrier"); + + return err; +} /** * Entry point to this code when a new device is created. Allocate the basic @@ -366,13 +380,16 @@ static void connect(struct backend_info *be) /* Supply the information about the device the frontend needs */ again: err = xenbus_transaction_start(&xbt); - if (err) { xenbus_dev_fatal(dev, err, "starting transaction"); return; } - err = xenbus_printf(xbt, dev->nodename, "sectors", "%lu", + err = blkback_barrier(xbt, be, 1); + if (err) + goto abort; + + err = xenbus_printf(xbt, dev->nodename, "sectors", "%llu", vbd_size(&be->blkif->vbd)); if (err) { xenbus_dev_fatal(dev, err, "writing %s/sectors", |