[SCSI] lpfc 8.2.5 : Correct ndlp referencing issues
Correct ndlp referencing issues:
- Fix ndlp kref issues due to race conditions between threads
- Fix cancel els delay retry event which missed an ndlp reference count
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/lpfc/lpfc_disc.h b/drivers/scsi/lpfc/lpfc_disc.h
index cfe81c5..8eb0073 100644
--- a/drivers/scsi/lpfc/lpfc_disc.h
+++ b/drivers/scsi/lpfc/lpfc_disc.h
@@ -1,7 +1,7 @@
/*******************************************************************
* This file is part of the Emulex Linux Device Driver for *
* Fibre Channel Host Bus Adapters. *
- * Copyright (C) 2004-2007 Emulex. All rights reserved. *
+ * Copyright (C) 2004-2008 Emulex. All rights reserved. *
* EMULEX and SLI are trademarks of Emulex. *
* www.emulex.com *
* *
@@ -73,6 +73,12 @@
uint8_t nlp_fcp_info; /* class info, bits 0-3 */
#define NLP_FCP_2_DEVICE 0x10 /* FCP-2 device */
+ uint16_t nlp_usg_map; /* ndlp management usage bitmap */
+#define NLP_USG_NODE_ACT_BIT 0x1 /* Indicate ndlp is actively used */
+#define NLP_USG_IACT_REQ_BIT 0x2 /* Request to inactivate ndlp */
+#define NLP_USG_FREE_REQ_BIT 0x4 /* Request to invoke ndlp memory free */
+#define NLP_USG_FREE_ACK_BIT 0x8 /* Indicate ndlp memory free invoked */
+
struct timer_list nlp_delayfunc; /* Used for delayed ELS cmds */
struct fc_rport *rport; /* Corresponding FC transport
port structure */
@@ -105,6 +111,31 @@
#define NLP_NODEV_REMOVE 0x8000000 /* Defer removal till discovery ends */
#define NLP_TARGET_REMOVE 0x10000000 /* Target remove in process */
+/* ndlp usage management macros */
+#define NLP_CHK_NODE_ACT(ndlp) (((ndlp)->nlp_usg_map \
+ & NLP_USG_NODE_ACT_BIT) \
+ && \
+ !((ndlp)->nlp_usg_map \
+ & NLP_USG_FREE_ACK_BIT))
+#define NLP_SET_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_NODE_ACT_BIT)
+#define NLP_INT_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
+ = NLP_USG_NODE_ACT_BIT)
+#define NLP_CLR_NODE_ACT(ndlp) ((ndlp)->nlp_usg_map \
+ &= ~NLP_USG_NODE_ACT_BIT)
+#define NLP_CHK_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ & NLP_USG_IACT_REQ_BIT)
+#define NLP_SET_IACT_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_IACT_REQ_BIT)
+#define NLP_CHK_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ & NLP_USG_FREE_REQ_BIT)
+#define NLP_SET_FREE_REQ(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_FREE_REQ_BIT)
+#define NLP_CHK_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
+ & NLP_USG_FREE_ACK_BIT)
+#define NLP_SET_FREE_ACK(ndlp) ((ndlp)->nlp_usg_map \
+ |= NLP_USG_FREE_ACK_BIT)
+
/* There are 4 different double linked lists nodelist entries can reside on.
* The Port Login (PLOGI) list and Address Discovery (ADISC) list are used
* when Link Up discovery or Registered State Change Notification (RSCN)
