fd84ec206d
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Karan Tilak Kumar <kartilak@cisco.com> Cc: Sesidhar Baddela <sebaddel@cisco.com> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: linux-scsi@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
492 lines
14 KiB
C
492 lines
14 KiB
C
/*
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* Copyright 2014 Cisco Systems, Inc. All rights reserved.
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/debugfs.h>
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#include "snic.h"
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/*
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* snic_debugfs_init - Initialize debugfs for snic debug logging
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*
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* Description:
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* When Debugfs is configured this routine sets up fnic debugfs
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* filesystem. If not already created. this routine will crate the
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* fnic directory and statistics directory for trace buffer and
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* stats logging
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*/
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void snic_debugfs_init(void)
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{
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snic_glob->trc_root = debugfs_create_dir("snic", NULL);
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snic_glob->stats_root = debugfs_create_dir("statistics",
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snic_glob->trc_root);
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}
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/*
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* snic_debugfs_term - Tear down debugfs intrastructure
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*
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* Description:
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* When Debufs is configured this routine removes debugfs file system
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* elements that are specific to snic
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*/
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void
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snic_debugfs_term(void)
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{
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debugfs_remove(snic_glob->stats_root);
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snic_glob->stats_root = NULL;
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debugfs_remove(snic_glob->trc_root);
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snic_glob->trc_root = NULL;
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}
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/*
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* snic_reset_stats_open - Open the reset_stats file
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*/
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static int
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snic_reset_stats_open(struct inode *inode, struct file *filp)
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{
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SNIC_BUG_ON(!inode->i_private);
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filp->private_data = inode->i_private;
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return 0;
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}
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/*
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* snic_reset_stats_read - Read a reset_stats debugfs file
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* @filp: The file pointer to read from.
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* @ubuf: The buffer tocopy the data to.
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* @cnt: The number of bytes to read.
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* @ppos: The position in the file to start reading frm.
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*
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* Description:
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* This routine reads value of variable reset_stats
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* and stores into local @buf. It will start reading file @ppos and
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* copy up to @cnt of data to @ubuf from @buf.
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*
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* Returns:
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* This function returns the amount of data that was read.
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*/
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static ssize_t
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snic_reset_stats_read(struct file *filp,
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char __user *ubuf,
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size_t cnt,
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loff_t *ppos)
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{
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struct snic *snic = (struct snic *) filp->private_data;
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char buf[64];
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int len;
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len = sprintf(buf, "%u\n", snic->reset_stats);
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return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
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}
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/*
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* snic_reset_stats_write - Write to reset_stats debugfs file
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* @filp: The file pointer to write from
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* @ubuf: The buffer to copy the data from.
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* @cnt: The number of bytes to write.
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* @ppos: The position in the file to start writing to.
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*
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* Description:
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* This routine writes data from user buffer @ubuf to buffer @buf and
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* resets cumulative stats of snic.
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*
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* Returns:
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* This function returns the amount of data that was written.
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*/
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static ssize_t
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snic_reset_stats_write(struct file *filp,
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const char __user *ubuf,
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size_t cnt,
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loff_t *ppos)
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{
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struct snic *snic = (struct snic *) filp->private_data;
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struct snic_stats *stats = &snic->s_stats;
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u64 *io_stats_p = (u64 *) &stats->io;
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u64 *fw_stats_p = (u64 *) &stats->fw;
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char buf[64];
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unsigned long val;
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int ret;
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if (cnt >= sizeof(buf))
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return -EINVAL;
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if (copy_from_user(&buf, ubuf, cnt))
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return -EFAULT;
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buf[cnt] = '\0';
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ret = kstrtoul(buf, 10, &val);
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if (ret < 0)
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return ret;
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snic->reset_stats = val;
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if (snic->reset_stats) {
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/* Skip variable is used to avoid descrepancies to Num IOs
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* and IO Completions stats. Skip incrementing No IO Compls
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* for pending active IOs after reset_stats
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*/
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atomic64_set(&snic->io_cmpl_skip,
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atomic64_read(&stats->io.active));
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memset(&stats->abts, 0, sizeof(struct snic_abort_stats));
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memset(&stats->reset, 0, sizeof(struct snic_reset_stats));
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memset(&stats->misc, 0, sizeof(struct snic_misc_stats));
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memset(io_stats_p+1,
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0,
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sizeof(struct snic_io_stats) - sizeof(u64));
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memset(fw_stats_p+1,
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0,
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sizeof(struct snic_fw_stats) - sizeof(u64));
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}
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(*ppos)++;
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SNIC_HOST_INFO(snic->shost, "Reset Op: Driver statistics.\n");
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return cnt;
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}
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static int
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snic_reset_stats_release(struct inode *inode, struct file *filp)
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{
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filp->private_data = NULL;
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return 0;
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}
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/*
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* snic_stats_show - Formats and prints per host specific driver stats.
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*/
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static int
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snic_stats_show(struct seq_file *sfp, void *data)
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{
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struct snic *snic = (struct snic *) sfp->private;
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struct snic_stats *stats = &snic->s_stats;
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struct timespec64 last_isr_tms, last_ack_tms;
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u64 maxio_tm;
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int i;
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/* Dump IO Stats */
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seq_printf(sfp,
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"------------------------------------------\n"
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"\t\t IO Statistics\n"
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"------------------------------------------\n");
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maxio_tm = (u64) atomic64_read(&stats->io.max_time);
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seq_printf(sfp,
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"Active IOs : %lld\n"
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"Max Active IOs : %lld\n"
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"Total IOs : %lld\n"
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"IOs Completed : %lld\n"
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"IOs Failed : %lld\n"
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"IOs Not Found : %lld\n"
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"Memory Alloc Failures : %lld\n"
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"REQs Null : %lld\n"
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"SCSI Cmd Pointers Null : %lld\n"
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"Max SGL for any IO : %lld\n"
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"Max IO Size : %lld Sectors\n"
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"Max Queuing Time : %lld\n"
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"Max Completion Time : %lld\n"
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"Max IO Process Time(FW) : %lld (%u msec)\n",
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(u64) atomic64_read(&stats->io.active),
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(u64) atomic64_read(&stats->io.max_active),
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(u64) atomic64_read(&stats->io.num_ios),
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(u64) atomic64_read(&stats->io.compl),
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(u64) atomic64_read(&stats->io.fail),
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(u64) atomic64_read(&stats->io.io_not_found),
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(u64) atomic64_read(&stats->io.alloc_fail),
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(u64) atomic64_read(&stats->io.req_null),
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(u64) atomic64_read(&stats->io.sc_null),
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(u64) atomic64_read(&stats->io.max_sgl),
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(u64) atomic64_read(&stats->io.max_io_sz),
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(u64) atomic64_read(&stats->io.max_qtime),
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(u64) atomic64_read(&stats->io.max_cmpl_time),
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maxio_tm,
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jiffies_to_msecs(maxio_tm));
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seq_puts(sfp, "\nSGL Counters\n");
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for (i = 0; i < SNIC_MAX_SG_DESC_CNT; i++) {
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seq_printf(sfp,
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"%10lld ",
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(u64) atomic64_read(&stats->io.sgl_cnt[i]));
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if ((i + 1) % 8 == 0)
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seq_puts(sfp, "\n");
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}
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/* Dump Abort Stats */
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seq_printf(sfp,
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"\n-------------------------------------------\n"
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"\t\t Abort Statistics\n"
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"---------------------------------------------\n");
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seq_printf(sfp,
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"Aborts : %lld\n"
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"Aborts Fail : %lld\n"
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"Aborts Driver Timeout : %lld\n"
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"Abort FW Timeout : %lld\n"
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"Abort IO NOT Found : %lld\n"
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"Abort Queuing Failed : %lld\n",
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(u64) atomic64_read(&stats->abts.num),
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(u64) atomic64_read(&stats->abts.fail),
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(u64) atomic64_read(&stats->abts.drv_tmo),
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(u64) atomic64_read(&stats->abts.fw_tmo),
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(u64) atomic64_read(&stats->abts.io_not_found),
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(u64) atomic64_read(&stats->abts.q_fail));
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/* Dump Reset Stats */
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seq_printf(sfp,
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"\n-------------------------------------------\n"
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"\t\t Reset Statistics\n"
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"---------------------------------------------\n");
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seq_printf(sfp,
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"HBA Resets : %lld\n"
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"HBA Reset Cmpls : %lld\n"
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"HBA Reset Fail : %lld\n",
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(u64) atomic64_read(&stats->reset.hba_resets),
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(u64) atomic64_read(&stats->reset.hba_reset_cmpl),
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(u64) atomic64_read(&stats->reset.hba_reset_fail));
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/* Dump Firmware Stats */
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seq_printf(sfp,
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"\n-------------------------------------------\n"
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"\t\t Firmware Statistics\n"
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"---------------------------------------------\n");
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seq_printf(sfp,
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"Active FW Requests : %lld\n"
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"Max FW Requests : %lld\n"
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"FW Out Of Resource Errs : %lld\n"
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"FW IO Errors : %lld\n"
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"FW SCSI Errors : %lld\n",
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(u64) atomic64_read(&stats->fw.actv_reqs),
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(u64) atomic64_read(&stats->fw.max_actv_reqs),
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(u64) atomic64_read(&stats->fw.out_of_res),
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(u64) atomic64_read(&stats->fw.io_errs),
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(u64) atomic64_read(&stats->fw.scsi_errs));
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/* Dump Miscellenous Stats */
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seq_printf(sfp,
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"\n---------------------------------------------\n"
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"\t\t Other Statistics\n"
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"\n---------------------------------------------\n");
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jiffies_to_timespec64(stats->misc.last_isr_time, &last_isr_tms);
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jiffies_to_timespec64(stats->misc.last_ack_time, &last_ack_tms);
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seq_printf(sfp,
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"Last ISR Time : %llu (%8llu.%09lu)\n"
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"Last Ack Time : %llu (%8llu.%09lu)\n"
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"Ack ISRs : %llu\n"
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"IO Cmpl ISRs : %llu\n"
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"Err Notify ISRs : %llu\n"
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"Max CQ Entries : %lld\n"
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"Data Count Mismatch : %lld\n"
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"IOs w/ Timeout Status : %lld\n"
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"IOs w/ Aborted Status : %lld\n"
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"IOs w/ SGL Invalid Stat : %lld\n"
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"WQ Desc Alloc Fail : %lld\n"
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"Queue Full : %lld\n"
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"Queue Ramp Up : %lld\n"
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"Queue Ramp Down : %lld\n"
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"Queue Last Queue Depth : %lld\n"
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"Target Not Ready : %lld\n",
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(u64) stats->misc.last_isr_time,
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last_isr_tms.tv_sec, last_isr_tms.tv_nsec,
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(u64)stats->misc.last_ack_time,
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last_ack_tms.tv_sec, last_ack_tms.tv_nsec,
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(u64) atomic64_read(&stats->misc.ack_isr_cnt),
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(u64) atomic64_read(&stats->misc.cmpl_isr_cnt),
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(u64) atomic64_read(&stats->misc.errnotify_isr_cnt),
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(u64) atomic64_read(&stats->misc.max_cq_ents),
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(u64) atomic64_read(&stats->misc.data_cnt_mismat),
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(u64) atomic64_read(&stats->misc.io_tmo),
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(u64) atomic64_read(&stats->misc.io_aborted),
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(u64) atomic64_read(&stats->misc.sgl_inval),
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(u64) atomic64_read(&stats->misc.wq_alloc_fail),
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(u64) atomic64_read(&stats->misc.qfull),
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(u64) atomic64_read(&stats->misc.qsz_rampup),
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(u64) atomic64_read(&stats->misc.qsz_rampdown),
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(u64) atomic64_read(&stats->misc.last_qsz),
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(u64) atomic64_read(&stats->misc.tgt_not_rdy));
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return 0;
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}
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/*
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* snic_stats_open - Open the stats file for specific host
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*
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* Description:
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* This routine opens a debugfs file stats of specific host
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*/
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static int
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snic_stats_open(struct inode *inode, struct file *filp)
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{
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return single_open(filp, snic_stats_show, inode->i_private);
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}
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static const struct file_operations snic_stats_fops = {
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.owner = THIS_MODULE,
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.open = snic_stats_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations snic_reset_stats_fops = {
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.owner = THIS_MODULE,
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.open = snic_reset_stats_open,
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.read = snic_reset_stats_read,
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.write = snic_reset_stats_write,
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.release = snic_reset_stats_release,
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};
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/*
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* snic_stats_init - Initialize stats struct and create stats file
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* per snic
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*
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* Description:
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* When debugfs is cofigured this routine sets up the stats file per snic
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* It will create file stats and reset_stats under statistics/host# directory
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* to log per snic stats
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*/
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void snic_stats_debugfs_init(struct snic *snic)
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{
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char name[16];
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snprintf(name, sizeof(name), "host%d", snic->shost->host_no);
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snic->stats_host = debugfs_create_dir(name, snic_glob->stats_root);
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snic->stats_file = debugfs_create_file("stats", S_IFREG|S_IRUGO,
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snic->stats_host, snic,
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&snic_stats_fops);
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snic->reset_stats_file = debugfs_create_file("reset_stats",
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S_IFREG|S_IRUGO|S_IWUSR,
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snic->stats_host, snic,
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&snic_reset_stats_fops);
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}
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/*
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* snic_stats_debugfs_remove - Tear down debugfs infrastructure of stats
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*
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* Description:
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* When Debufs is configured this routine removes debugfs file system
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* elements that are specific to to snic stats
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*/
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void
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snic_stats_debugfs_remove(struct snic *snic)
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{
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debugfs_remove(snic->stats_file);
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snic->stats_file = NULL;
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debugfs_remove(snic->reset_stats_file);
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snic->reset_stats_file = NULL;
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debugfs_remove(snic->stats_host);
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snic->stats_host = NULL;
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}
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/* Trace Facility related API */
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static void *
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snic_trc_seq_start(struct seq_file *sfp, loff_t *pos)
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{
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return &snic_glob->trc;
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}
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static void *
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snic_trc_seq_next(struct seq_file *sfp, void *data, loff_t *pos)
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{
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return NULL;
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}
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static void
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snic_trc_seq_stop(struct seq_file *sfp, void *data)
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{
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}
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#define SNIC_TRC_PBLEN 256
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static int
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snic_trc_seq_show(struct seq_file *sfp, void *data)
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{
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char buf[SNIC_TRC_PBLEN];
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if (snic_get_trc_data(buf, SNIC_TRC_PBLEN) > 0)
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seq_printf(sfp, "%s\n", buf);
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return 0;
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}
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static const struct seq_operations snic_trc_seq_ops = {
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.start = snic_trc_seq_start,
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.next = snic_trc_seq_next,
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.stop = snic_trc_seq_stop,
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.show = snic_trc_seq_show,
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};
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static int
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snic_trc_open(struct inode *inode, struct file *filp)
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{
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return seq_open(filp, &snic_trc_seq_ops);
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}
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static const struct file_operations snic_trc_fops = {
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.owner = THIS_MODULE,
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.open = snic_trc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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/*
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* snic_trc_debugfs_init : creates trace/tracing_enable files for trace
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* under debugfs
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*/
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void snic_trc_debugfs_init(void)
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{
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snic_glob->trc.trc_enable = debugfs_create_bool("tracing_enable",
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S_IFREG | S_IRUGO | S_IWUSR,
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snic_glob->trc_root,
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&snic_glob->trc.enable);
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|
|
|
snic_glob->trc.trc_file = debugfs_create_file("trace",
|
|
S_IFREG | S_IRUGO | S_IWUSR,
|
|
snic_glob->trc_root, NULL,
|
|
&snic_trc_fops);
|
|
}
|
|
|
|
/*
|
|
* snic_trc_debugfs_term : cleans up the files created for trace under debugfs
|
|
*/
|
|
void
|
|
snic_trc_debugfs_term(void)
|
|
{
|
|
debugfs_remove(snic_glob->trc.trc_file);
|
|
snic_glob->trc.trc_file = NULL;
|
|
|
|
debugfs_remove(snic_glob->trc.trc_enable);
|
|
snic_glob->trc.trc_enable = NULL;
|
|
}
|