From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robert Love Subject: [PATCH 09/15] libfc: Add runtime debugging with debug_logging module parameter Date: Fri, 03 Apr 2009 14:58:47 -0700 Message-ID: <20090403215846.10856.99436.stgit@fritz> References: <20090403215758.10856.6946.stgit@fritz> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com ([134.134.136.20]:28234 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759769AbZDCV6s (ORCPT ); Fri, 3 Apr 2009 17:58:48 -0400 In-Reply-To: <20090403215758.10856.6946.stgit@fritz> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James.Bottomley@HansenPartnership.com, linux-scsi@vger.kernel.org This patch adds the /sys/module/libfc/parameters/debug_logging file to sysfs as a module parameter. It accepts an integer bitmask for logging. Currently it supports: bit LSB 0 = general libfc debugging 1 = lport debugging 2 = disc debugging 3 = rport debugging 4 = fcp debugging 5 = EM debugging 6 = exch/seq debugging 7 = scsi logging (mostly error handling) the other bits are not used at this time. Signed-off-by: Robert Love --- drivers/scsi/libfc/fc_fcp.c | 4 +++ include/scsi/libfc.h | 67 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 71 insertions(+), 0 deletions(-) diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c index f555ae9..f21fbcc 100644 --- a/drivers/scsi/libfc/fc_fcp.c +++ b/drivers/scsi/libfc/fc_fcp.c @@ -43,6 +43,10 @@ MODULE_AUTHOR("Open-FCoE.org"); MODULE_DESCRIPTION("libfc"); MODULE_LICENSE("GPL v2"); +unsigned int fc_debug_logging; +module_param_named(debug_logging, fc_debug_logging, int, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); + static int fc_fcp_debug; #define FC_DEBUG_FCP(fmt...) \ diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h index 45f9cc6..3afa005 100644 --- a/include/scsi/libfc.h +++ b/include/scsi/libfc.h @@ -46,6 +46,73 @@ #define FC_DBG(fmt, args...) #endif +#define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */ +#define FC_LPORT_LOGGING 0x02 /* lport layer logging */ +#define FC_DISC_LOGGING 0x04 /* discovery layer logging */ +#define FC_RPORT_LOGGING 0x08 /* rport layer logging */ +#define FC_FCP_LOGGING 0x10 /* I/O path logging */ +#define FC_EM_LOGGING 0x20 /* Exchange Manager logging */ +#define FC_EXCH_LOGGING 0x40 /* Exchange/Sequence logging */ +#define FC_SCSI_LOGGING 0x80 /* SCSI logging (mostly error handling) */ + +extern unsigned int fc_debug_logging; + +#define FC_CHECK_LOGGING(LEVEL, CMD) \ +do { \ + if (unlikely(fc_debug_logging & LEVEL)) \ + do { \ + CMD; \ + } while (0); \ +} while (0); + +#define FC_LIBFC_DBG(fmt, args...) \ + FC_CHECK_LOGGING(FC_LIBFC_LOGGING, \ + printk(KERN_INFO "libfc: " fmt, ##args);) + +#define FC_LPORT_DBG(lport, fmt, args...) \ + FC_CHECK_LOGGING(FC_LPORT_LOGGING, \ + printk(KERN_INFO "lport: %6x: " fmt, \ + fc_host_port_id(lport->host), ##args);) + +#define FC_DISC_DBG(disc, fmt, args...) \ + FC_CHECK_LOGGING(FC_DISC_LOGGING, \ + printk(KERN_INFO "disc: %6x: " fmt, \ + fc_host_port_id(disc->lport->host), \ + ##args);) + +#define FC_RPORT_DBG(rport, fmt, args...) \ +do { \ + struct fc_rport_libfc_priv *rdata = rport->dd_data; \ + struct fc_lport *lport = rdata->local_port; \ + FC_CHECK_LOGGING(FC_RPORT_LOGGING, \ + printk(KERN_INFO "rport: %6x: %6x: " fmt, \ + fc_host_port_id(lport->host), \ + rport->port_id, ##args);) \ +} while (0); + +#define FC_FCP_DBG(pkt, fmt, args...) \ + FC_CHECK_LOGGING(FC_FCP_LOGGING, \ + printk(KERN_INFO "fcp: %6x: %6x: " fmt, \ + fc_host_port_id(pkt->lp->host), \ + pkt->rport->port_id, ##args);) + +#define FC_EM_DBG(em, fmt, args...) \ + FC_CHECK_LOGGING(FC_EM_LOGGING, \ + printk(KERN_INFO "em: %6x: " fmt, \ + fc_host_port_id(em->lp->host), \ + ##args);) + +#define FC_EXCH_DBG(exch, fmt, args...) \ + FC_CHECK_LOGGING(FC_EXCH_LOGGING, \ + printk(KERN_INFO "exch: %6x: %4x: " fmt, \ + fc_host_port_id(exch->lp->host), \ + exch->xid, ##args);) + +#define FC_SCSI_DBG(lport, fmt, args...) \ + FC_CHECK_LOGGING(FC_SCSI_LOGGING, \ + printk(KERN_INFO "scsi: %6x: " fmt, \ + fc_host_port_id(lport->host), ##args);) + /* * libfc error codes */