Re: [PATCH-v2 2/9] target/pr: Use atomic bitop for se_dev_entry->pr_reg reservation check

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 05/22/15 08:11, Nicholas A. Bellinger wrote:
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index e2c0eaf..def5bc8 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -638,7 +638,6 @@ struct se_lun_acl {
  };

  struct se_dev_entry {
-	bool			def_pr_registered;
  	/* See transport_lunflags_table */
  	u32			lun_flags;
  	u32			mapped_lun;
@@ -655,7 +654,8 @@ struct se_dev_entry {
  	struct se_node_acl	*se_node_acl;
  	struct se_lun_acl __rcu	*se_lun_acl;
  	spinlock_t		ua_lock;
-	struct se_lun		*se_lun;
+	struct se_lun __rcu	*se_lun;
+	unsigned long		pr_reg;
  	struct list_head	alua_port_list;
  	struct list_head	ua_list;
  	struct hlist_node	link;

Hello Nic,

This change causes the "se_lun = deve->se_lun" assignment in transport_lookup_cmd_lun() to assign an RCU pointer to a non-RCU pointer. Shouldn't such an assignment be protected via rcu_dereference() ?

Thanks,

Bart.
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]
  Powered by Linux