[SCSI] target: Convert backend ->create_virtdevice() call to return ERR_PTR
This patch converts the target_core_store_dev_enable() -> struct
se_subsystem_api->create_virtdevice() call to return proper ERR_PTR values
back up to configfs logic during backend dependent struct se_device ENABLE
exception conditions.
Along with the change to target_core_configfs.c, this includes converting IBLOCK,
FILEIO, pSCSI, and RAMDISK_* backend subsystem plugins to obtain upper level
PTR_ERR return codes (where available), and return via ERR_PTR during a
*_create_virtdev() failure.
Reported-by: Fubo Chen <fubo.chen@gmail.com>
Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 96d98cc..0f4a509 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -129,10 +129,11 @@
struct request_queue *q;
struct queue_limits *limits;
u32 dev_flags = 0;
+ int ret = -EINVAL;
if (!(ib_dev)) {
printk(KERN_ERR "Unable to locate struct iblock_dev parameter\n");
- return 0;
+ return ERR_PTR(ret);
}
memset(&dev_limits, 0, sizeof(struct se_dev_limits));
/*
@@ -141,7 +142,7 @@
ib_dev->ibd_bio_set = bioset_create(32, 64);
if (!(ib_dev->ibd_bio_set)) {
printk(KERN_ERR "IBLOCK: Unable to create bioset()\n");
- return 0;
+ return ERR_PTR(-ENOMEM);
}
printk(KERN_INFO "IBLOCK: Created bio_set()\n");
/*
@@ -153,8 +154,10 @@
bd = blkdev_get_by_path(ib_dev->ibd_udev_path,
FMODE_WRITE|FMODE_READ|FMODE_EXCL, ib_dev);
- if (IS_ERR(bd))
+ if (IS_ERR(bd)) {
+ ret = PTR_ERR(bd);
goto failed;
+ }
/*
* Setup the local scope queue_limits from struct request_queue->limits
* to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
@@ -184,9 +187,7 @@
* the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
* in ATA and we need to set TPE=1
*/
- if (blk_queue_discard(bdev_get_queue(bd))) {
- struct request_queue *q = bdev_get_queue(bd);
-
+ if (blk_queue_discard(q)) {
DEV_ATTRIB(dev)->max_unmap_lba_count =
q->limits.max_discard_sectors;
/*
@@ -212,7 +213,7 @@
ib_dev->ibd_bd = NULL;
ib_dev->ibd_major = 0;
ib_dev->ibd_minor = 0;
- return NULL;
+ return ERR_PTR(ret);
}
static void iblock_free_device(void *p)
