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target/configfs: Kill se_device->dev_link_magic

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Instead of using a hardcoded magic value in se_device when verifying
a target config_item symlink source during target_fabric_port_link(),
go ahead and use target_core_dev_item_ops directly instead.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Mike Christie <mchristi@redhat.com>
Cc: Hannes Reinecke <hare@suse.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2017-06-01 03:10:53 -07:00
parent 2237498f0b
commit c17cd24959
4 changed files with 12 additions and 9 deletions
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6
drivers/target/target_core_configfs.c
View File

@ -2236,7 +2236,11 @@ static void target_core_dev_release(struct config_item *item)
target_free_device(dev);
}
static struct configfs_item_operations target_core_dev_item_ops = {
/*
* Used in target_core_fabric_configfs.c to verify valid se_device symlink
* within target_fabric_port_link()
*/
struct configfs_item_operations target_core_dev_item_ops = {
.release = target_core_dev_release,
};

1
drivers/target/target_core_device.c
View File

@ -756,7 +756,6 @@ struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
if (!dev)
return NULL;
dev->dev_link_magic = SE_DEV_LINK_MAGIC;
dev->se_hba = hba;
dev->transport = hba->backend->ops;
dev->prot_length = sizeof(struct t10_pi_tuple);

12
drivers/target/target_core_fabric_configfs.c
View File

@ -620,6 +620,8 @@ static struct configfs_attribute *target_fabric_port_attrs[] = {
NULL,
};
extern struct configfs_item_operations target_core_dev_item_ops;
static int target_fabric_port_link(
struct config_item *lun_ci,
struct config_item *se_dev_ci)
@ -628,16 +630,16 @@ static int target_fabric_port_link(
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_portal_group *se_tpg;
struct se_device *dev =
container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
struct se_device *dev;
struct target_fabric_configfs *tf;
int ret;
if (dev->dev_link_magic != SE_DEV_LINK_MAGIC) {
pr_err("Bad dev->dev_link_magic, not a valid se_dev_ci pointer:"
" %p to struct se_device: %p\n", se_dev_ci, dev);
if (!se_dev_ci->ci_type ||
se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) {
pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci);
return -EFAULT;
}
dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
if (!(dev->dev_flags & DF_CONFIGURED)) {
pr_err("se_device not configured yet, cannot port link\n");

2
include/target/target_core_base.h
View File

@ -746,8 +746,6 @@ struct se_dev_stat_grps {
};
struct se_device {
#define SE_DEV_LINK_MAGIC 0xfeeddeef
u32 dev_link_magic;
/* RELATIVE TARGET PORT IDENTIFER Counter */
u16 dev_rpti_counter;
/* Used for SAM Task Attribute ordering */