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Date: Tue, 9 Aug 2011 15:54:44 -0500
From: Saurav Kashyap <saurav.kashyap@...gic.com>
To: Joe Perches <joe@...ches.com>,
Andrew Vasquez <andrew.vasquez@...gic.com>,
Linux Driver <Linux-Driver@...gic.com>
CC: "James E.J. Bottomley" <JBottomley@...allels.com>,
"linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] qla2xxx: Rewrite logging functions to use %pV
Acked by: Saurav Kashyap <saurav.kashyap@...gic.com>
Thanks,
~Saurav
> -----Original Message-----
> From: linux-scsi-owner@...r.kernel.org [mailto:linux-scsi-
> owner@...r.kernel.org] On Behalf Of Joe Perches
> Sent: 30 July 2011 16:05
> To: Andrew Vasquez; Linux Driver
> Cc: James E.J. Bottomley; linux-scsi@...r.kernel.org; linux-kernel
> Subject: [PATCH 1/2] qla2xxx: Rewrite logging functions to use %pV
>
> Use less stack to emit logging messages.
>
> Return early when logging level too low.
> Use normal kernel coding style for function braces.
> Add const where appropriate to logging functions.
> Remove now unused #define QL_DBG_BUF_LEN.
>
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
> drivers/scsi/qla2xxx/qla_dbg.c | 212 +++++++++++++++++++-------------
> -------
> drivers/scsi/qla2xxx/qla_dbg.h | 10 +-
> 2 files changed, 107 insertions(+), 115 deletions(-)
>
> diff --git a/drivers/scsi/qla2xxx/qla_dbg.c
> b/drivers/scsi/qla2xxx/qla_dbg.c
> index 2155071..95ec457 100644
> --- a/drivers/scsi/qla2xxx/qla_dbg.c
> +++ b/drivers/scsi/qla2xxx/qla_dbg.c
> @@ -1664,34 +1664,31 @@ qla81xx_fw_dump_failed:
> * msg: The message to be displayed.
> */
> void
> -ql_dbg(uint32_t level, scsi_qla_host_t *vha, int32_t id, char *msg,
> ...) {
> +ql_dbg(uint32_t level, scsi_qla_host_t *vha, int32_t id, const char
> *fmt, ...)
> +{
> + va_list va;
> + struct va_format vaf;
>
> - char pbuf[QL_DBG_BUF_LEN];
> - va_list ap;
> - uint32_t len;
> - struct pci_dev *pdev = NULL;
> + if ((level & ql2xextended_error_logging) != level)
> + return;
>
> - memset(pbuf, 0, QL_DBG_BUF_LEN);
> + va_start(va, fmt);
>
> - va_start(ap, msg);
> + vaf.fmt = fmt;
> + vaf.va = &va;
>
> - if ((level & ql2xextended_error_logging) == level) {
> - if (vha != NULL) {
> - pdev = vha->hw->pdev;
> - /* <module-name> <pci-name> <msg-id>:<host> Message
> */
> - sprintf(pbuf, "%s [%s]-%04x:%ld: ", QL_MSGHDR,
> - dev_name(&(pdev->dev)), id + ql_dbg_offset,
> - vha->host_no);
> - } else
> - sprintf(pbuf, "%s [%s]-%04x: : ", QL_MSGHDR,
> - "0000:00:00.0", id + ql_dbg_offset);
> -
> - len = strlen(pbuf);
> - vsprintf(pbuf+len, msg, ap);
> - pr_warning("%s", pbuf);
> + if (vha != NULL) {
> + const struct pci_dev *pdev = vha->hw->pdev;
> + /* <module-name> <pci-name> <msg-id>:<host> Message */
> + pr_warn("%s [%s]-%04x:%ld: %pV",
> + QL_MSGHDR, dev_name(&(pdev->dev)), id +
> ql_dbg_offset,
> + vha->host_no, &vaf);
> + } else {
> + pr_warn("%s [%s]-%04x: : %pV",
> + QL_MSGHDR, "0000:00:00.0", id + ql_dbg_offset, &vaf);
> }
>
> - va_end(ap);
> + va_end(va);
>
> }
>
> @@ -1710,31 +1707,27 @@ ql_dbg(uint32_t level, scsi_qla_host_t *vha,
> int32_t id, char *msg, ...) {
> * msg: The message to be displayed.
> */
> void
> -ql_dbg_pci(uint32_t level, struct pci_dev *pdev, int32_t id, char
> *msg, ...) {
> -
> - char pbuf[QL_DBG_BUF_LEN];
> - va_list ap;
> - uint32_t len;
> +ql_dbg_pci(uint32_t level, struct pci_dev *pdev, int32_t id,
> + const char *fmt, ...)
> +{
> + va_list va;
> + struct va_format vaf;
>
> if (pdev == NULL)
> return;
> + if ((level & ql2xextended_error_logging) != level)
> + return;
>
> - memset(pbuf, 0, QL_DBG_BUF_LEN);
> -
> - va_start(ap, msg);
> -
> - if ((level & ql2xextended_error_logging) == level) {
> - /* <module-name> <dev-name>:<msg-id> Message */
> - sprintf(pbuf, "%s [%s]-%04x: : ", QL_MSGHDR,
> - dev_name(&(pdev->dev)), id + ql_dbg_offset);
> + va_start(va, fmt);
>
> - len = strlen(pbuf);
> - vsprintf(pbuf+len, msg, ap);
> - pr_warning("%s", pbuf);
> - }
> + vaf.fmt = fmt;
> + vaf.va = &va;
>
> - va_end(ap);
> + /* <module-name> <dev-name>:<msg-id> Message */
> + pr_warn("%s [%s]-%04x: : %pV",
> + QL_MSGHDR, dev_name(&(pdev->dev)), id + ql_dbg_offset,
> &vaf);
>
> + va_end(va);
> }
>
> /*
> @@ -1751,47 +1744,47 @@ ql_dbg_pci(uint32_t level, struct pci_dev
> *pdev, int32_t id, char *msg, ...) {
> * msg: The message to be displayed.
> */
> void
> -ql_log(uint32_t level, scsi_qla_host_t *vha, int32_t id, char *msg,
> ...) {
> -
> - char pbuf[QL_DBG_BUF_LEN];
> - va_list ap;
> - uint32_t len;
> - struct pci_dev *pdev = NULL;
> -
> - memset(pbuf, 0, QL_DBG_BUF_LEN);
> -
> - va_start(ap, msg);
> -
> - if (level <= ql_errlev) {
> - if (vha != NULL) {
> - pdev = vha->hw->pdev;
> - /* <module-name> <msg-id>:<host> Message */
> - sprintf(pbuf, "%s [%s]-%04x:%ld: ", QL_MSGHDR,
> - dev_name(&(pdev->dev)), id, vha->host_no);
> - } else
> - sprintf(pbuf, "%s [%s]-%04x: : ", QL_MSGHDR,
> - "0000:00:00.0", id);
> +ql_log(uint32_t level, scsi_qla_host_t *vha, int32_t id, const char
> *fmt, ...)
> +{
> + va_list va;
> + struct va_format vaf;
> + char pbuf[128];
>
> - len = strlen(pbuf);
> - vsprintf(pbuf+len, msg, ap);
> + if (level > ql_errlev)
> + return;
>
> - switch (level) {
> - case 0: /* FATAL LOG */
> - pr_crit("%s", pbuf);
> - break;
> - case 1:
> - pr_err("%s", pbuf);
> - break;
> - case 2:
> - pr_warn("%s", pbuf);
> - break;
> - default:
> - pr_info("%s", pbuf);
> - break;
> - }
> + if (vha != NULL) {
> + const struct pci_dev *pdev = vha->hw->pdev;
> + /* <module-name> <msg-id>:<host> Message */
> + snprintf(pbuf, sizeof(pbuf), "%s [%s]-%04x:%ld: ",
> + QL_MSGHDR, dev_name(&(pdev->dev)), id, vha->host_no);
> + } else {
> + snprintf(pbuf, sizeof(pbuf), "%s [%s]-%04x: : ",
> + QL_MSGHDR, "0000:00:00.0", id);
> + }
> + pbuf[sizeof(pbuf) - 1] = 0;
> +
> + va_start(va, fmt);
> +
> + vaf.fmt = fmt;
> + vaf.va = &va;
> +
> + switch (level) {
> + case 0: /* FATAL LOG */
> + pr_crit("%s%pV", pbuf, &vaf);
> + break;
> + case 1:
> + pr_err("%s%pV", pbuf, &vaf);
> + break;
> + case 2:
> + pr_warn("%s%pV", pbuf, &vaf);
> + break;
> + default:
> + pr_info("%s%pV", pbuf, &vaf);
> + break;
> }
>
> - va_end(ap);
> + va_end(va);
> }
>
> /*
> @@ -1809,43 +1802,44 @@ ql_log(uint32_t level, scsi_qla_host_t *vha,
> int32_t id, char *msg, ...) {
> * msg: The message to be displayed.
> */
> void
> -ql_log_pci(uint32_t level, struct pci_dev *pdev, int32_t id, char
> *msg, ...) {
> -
> - char pbuf[QL_DBG_BUF_LEN];
> - va_list ap;
> - uint32_t len;
> +ql_log_pci(uint32_t level, struct pci_dev *pdev, int32_t id,
> + const char *fmt, ...)
> +{
> + va_list va;
> + struct va_format vaf;
> + char pbuf[128];
>
> if (pdev == NULL)
> return;
> + if (level > ql_errlev)
> + return;
>
> - memset(pbuf, 0, QL_DBG_BUF_LEN);
> -
> - va_start(ap, msg);
> -
> - if (level <= ql_errlev) {
> - /* <module-name> <dev-name>:<msg-id> Message */
> - sprintf(pbuf, "%s [%s]-%04x: : ", QL_MSGHDR,
> - dev_name(&(pdev->dev)), id);
> -
> - len = strlen(pbuf);
> - vsprintf(pbuf+len, msg, ap);
> - switch (level) {
> - case 0: /* FATAL LOG */
> - pr_crit("%s", pbuf);
> - break;
> - case 1:
> - pr_err("%s", pbuf);
> - break;
> - case 2:
> - pr_warn("%s", pbuf);
> - break;
> - default:
> - pr_info("%s", pbuf);
> - break;
> - }
> + /* <module-name> <dev-name>:<msg-id> Message */
> + snprintf(pbuf, sizeof(pbuf), "%s [%s]-%04x: : ",
> + QL_MSGHDR, dev_name(&(pdev->dev)), id);
> + pbuf[sizeof(pbuf) - 1] = 0;
> +
> + va_start(va, fmt);
> +
> + vaf.fmt = fmt;
> + vaf.va = &va;
> +
> + switch (level) {
> + case 0: /* FATAL LOG */
> + pr_crit("%s%pV", pbuf, &vaf);
> + break;
> + case 1:
> + pr_err("%s%pV", pbuf, &vaf);
> + break;
> + case 2:
> + pr_warn("%s%pV", pbuf, &vaf);
> + break;
> + default:
> + pr_info("%s%pV", pbuf, &vaf);
> + break;
> }
>
> - va_end(ap);
> + va_end(va);
> }
>
> void
> @@ -1888,7 +1882,7 @@ ql_dump_buffer(uint32_t level, scsi_qla_host_t
> *vha, int32_t id,
> ql_dbg(level, vha, id, "----------------------------------"
> "----------------------------\n");
>
> - ql_dbg(level, vha, id, "");
> + ql_dbg(level, vha, id, " ");
> for (cnt = 0; cnt < size;) {
> c = *b++;
> printk("%02x", (uint32_t) c);
> diff --git a/drivers/scsi/qla2xxx/qla_dbg.h
> b/drivers/scsi/qla2xxx/qla_dbg.h
> index 98a377b..0692814 100644
> --- a/drivers/scsi/qla2xxx/qla_dbg.h
> +++ b/drivers/scsi/qla2xxx/qla_dbg.h
> @@ -245,14 +245,14 @@ struct qla2xxx_fw_dump {
> extern int ql_errlev;
>
> void
> -ql_dbg(uint32_t, scsi_qla_host_t *vha, int32_t, char *, ...);
> +ql_dbg(uint32_t, scsi_qla_host_t *vha, int32_t, const char *fmt, ...);
> void
> -ql_dbg_pci(uint32_t, struct pci_dev *pdev, int32_t, char *, ...);
> +ql_dbg_pci(uint32_t, struct pci_dev *pdev, int32_t, const char *fmt,
> ...);
>
> void
> -ql_log(uint32_t, scsi_qla_host_t *vha, int32_t, char *, ...);
> +ql_log(uint32_t, scsi_qla_host_t *vha, int32_t, const char *fmt, ...);
> void
> -ql_log_pci(uint32_t, struct pci_dev *pdev, int32_t, char *, ...);
> +ql_log_pci(uint32_t, struct pci_dev *pdev, int32_t, const char *fmt,
> ...);
>
> /* Debug Levels */
> /* The 0x40000000 is the max value any debug level can have
> @@ -275,5 +275,3 @@ ql_log_pci(uint32_t, struct pci_dev *pdev, int32_t,
> char *, ...);
> #define ql_dbg_misc 0x00010000 /* For dumping everything that is
> not
> * not covered by upper categories
> */
> -
> -#define QL_DBG_BUF_LEN 512
> --
> 1.7.6.131.g99019
>
> --
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