aboutsummaryrefslogtreecommitdiff
path: root/block
diff options
context:
space:
mode:
authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2007-03-28 13:29:24 +0200
committerJens Axboe <jens.axboe@oracle.com>2007-07-16 08:52:46 +0200
commit4e2872d6b0252d33f28ea67f33704208ca781978 (patch)
treef65f01929d9a262d57e779705ff3cc643ad0ffd0 /block
parentd351af01b9307566135cb0f355ca65d0952c10b5 (diff)
downloadlinux-linaro-4e2872d6b0252d33f28ea67f33704208ca781978.tar.gz
bind bsg to all SCSI devices
This patch binds bsg to all SCSI devices (their request queues) like the current sg driver does. We can send SCSI commands to non disk and cdrom scsi devices like OSD via bsg. This patch removes bsg_register_queue from blk_register_queue so bsg devices aren't bound to non SCSI block devices. If they want bsg, I'll send a patch to do that. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/bsg.c59
-rw-r--r--block/ll_rw_blk.c8
2 files changed, 52 insertions, 15 deletions
diff --git a/block/bsg.c b/block/bsg.c
index 4ea4bedb413..cd0221c61bf 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -29,6 +29,8 @@
#include <scsi/scsi.h>
#include <scsi/scsi_ioctl.h>
#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_driver.h>
#include <scsi/sg.h>
static char bsg_version[] = "block layer sg (bsg) 0.4";
@@ -962,6 +964,8 @@ int bsg_register_queue(struct request_queue *q, char *name)
{
struct bsg_class_device *bcd;
dev_t dev;
+ int ret;
+ struct class_device *class_dev = NULL;
/*
* we need a proper transport to send commands, not a stacked device
@@ -978,22 +982,54 @@ int bsg_register_queue(struct request_queue *q, char *name)
bcd->minor = bsg_device_nr;
bsg_device_nr++;
bcd->queue = q;
- bcd->class_dev = class_device_create(bsg_class, NULL, dev, bcd->dev, "%s", name);
- if (!bcd->class_dev)
+ class_dev = class_device_create(bsg_class, NULL, dev, bcd->dev, "%s", name);
+ if (IS_ERR(class_dev)) {
+ ret = PTR_ERR(class_dev);
goto err;
+ }
+ bcd->class_dev = class_dev;
+
+ if (q->kobj.dentry) {
+ ret = sysfs_create_link(&q->kobj, &bcd->class_dev->kobj, "bsg");
+ if (ret)
+ goto err;
+ }
+
list_add_tail(&bcd->list, &bsg_class_list);
- if (sysfs_create_link(&q->kobj, &bcd->class_dev->kobj, "bsg"))
- goto err;
+
mutex_unlock(&bsg_mutex);
return 0;
err:
bsg_device_nr--;
- if (bcd->class_dev)
+ if (class_dev)
class_device_destroy(bsg_class, MKDEV(BSG_MAJOR, bcd->minor));
mutex_unlock(&bsg_mutex);
- return -ENOMEM;
+ return ret;
+}
+
+static int bsg_add(struct class_device *cl_dev, struct class_interface *cl_intf)
+{
+ int ret;
+ struct scsi_device *sdp = to_scsi_device(cl_dev->dev);
+ struct request_queue *rq = sdp->request_queue;
+
+ if (rq->kobj.parent)
+ ret = bsg_register_queue(rq, kobject_name(rq->kobj.parent));
+ else
+ ret = bsg_register_queue(rq, kobject_name(&sdp->sdev_gendev.kobj));
+ return ret;
}
+static void bsg_remove(struct class_device *cl_dev, struct class_interface *cl_intf)
+{
+ bsg_unregister_queue(to_scsi_device(cl_dev->dev)->request_queue);
+}
+
+static struct class_interface bsg_intf = {
+ .add = bsg_add,
+ .remove = bsg_remove,
+};
+
static int __init bsg_init(void)
{
int ret, i;
@@ -1021,6 +1057,15 @@ static int __init bsg_init(void)
return ret;
}
+ ret = scsi_register_interface(&bsg_intf);
+ if (ret) {
+ printk(KERN_ERR "bsg: failed register scsi interface %d\n", ret);
+ kmem_cache_destroy(bsg_cmd_cachep);
+ class_destroy(bsg_class);
+ unregister_chrdev(BSG_MAJOR, "bsg");
+ return ret;
+ }
+
printk(KERN_INFO "%s loaded\n", bsg_version);
return 0;
}
@@ -1029,4 +1074,4 @@ MODULE_AUTHOR("Jens Axboe");
MODULE_DESCRIPTION("Block layer SGSI generic (sg) driver");
MODULE_LICENSE("GPL");
-subsys_initcall(bsg_init);
+device_initcall(bsg_init);
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 74a5498c29a..ef42bb2b12b 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -4091,13 +4091,6 @@ int blk_register_queue(struct gendisk *disk)
return ret;
}
- ret = bsg_register_queue(q, disk->disk_name);
- if (ret) {
- elv_unregister_queue(q);
- kobject_unregister(&q->kobj);
- return ret;
- }
-
return 0;
}
@@ -4106,7 +4099,6 @@ void blk_unregister_queue(struct gendisk *disk)
request_queue_t *q = disk->queue;
if (q && q->request_fn) {
- bsg_unregister_queue(q);
elv_unregister_queue(q);
kobject_uevent(&q->kobj, KOBJ_REMOVE);