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67125b0287
This feature gathers active and cumulative per fnic stats for io, abort, terminate, reset, vlan discovery path and it also includes various important stats for debugging issues. It also provided debugfs and ioctl interface for user to retrieve these stats. It also provides functionality to reset cumulative stats through user interface. Signed-off-by: Hiral Patel <hiralpat@cisco.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
459 lines
16 KiB
C
459 lines
16 KiB
C
/*
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* Copyright 2012 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/mempool.h>
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#include <linux/errno.h>
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#include <linux/spinlock.h>
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#include <linux/kallsyms.h>
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#include "fnic_io.h"
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#include "fnic.h"
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unsigned int trace_max_pages;
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static int fnic_max_trace_entries;
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static unsigned long fnic_trace_buf_p;
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static DEFINE_SPINLOCK(fnic_trace_lock);
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static fnic_trace_dbg_t fnic_trace_entries;
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int fnic_tracing_enabled = 1;
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/*
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* fnic_trace_get_buf - Give buffer pointer to user to fill up trace information
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*
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* Description:
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* This routine gets next available trace buffer entry location @wr_idx
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* from allocated trace buffer pages and give that memory location
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* to user to store the trace information.
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*
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* Return Value:
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* This routine returns pointer to next available trace entry
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* @fnic_buf_head for user to fill trace information.
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*/
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fnic_trace_data_t *fnic_trace_get_buf(void)
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{
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unsigned long fnic_buf_head;
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unsigned long flags;
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spin_lock_irqsave(&fnic_trace_lock, flags);
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/*
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* Get next available memory location for writing trace information
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* at @wr_idx and increment @wr_idx
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*/
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fnic_buf_head =
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fnic_trace_entries.page_offset[fnic_trace_entries.wr_idx];
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fnic_trace_entries.wr_idx++;
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/*
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* Verify if trace buffer is full then change wd_idx to
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* start from zero
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*/
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if (fnic_trace_entries.wr_idx >= fnic_max_trace_entries)
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fnic_trace_entries.wr_idx = 0;
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/*
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* Verify if write index @wr_idx and read index @rd_idx are same then
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* increment @rd_idx to move to next entry in trace buffer
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*/
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if (fnic_trace_entries.wr_idx == fnic_trace_entries.rd_idx) {
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fnic_trace_entries.rd_idx++;
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if (fnic_trace_entries.rd_idx >= fnic_max_trace_entries)
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fnic_trace_entries.rd_idx = 0;
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}
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return (fnic_trace_data_t *)fnic_buf_head;
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}
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/*
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* fnic_get_trace_data - Copy trace buffer to a memory file
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* @fnic_dbgfs_t: pointer to debugfs trace buffer
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*
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* Description:
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* This routine gathers the fnic trace debugfs data from the fnic_trace_data_t
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* buffer and dumps it to fnic_dbgfs_t. It will start at the rd_idx entry in
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* the log and process the log until the end of the buffer. Then it will gather
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* from the beginning of the log and process until the current entry @wr_idx.
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*
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* Return Value:
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* This routine returns the amount of bytes that were dumped into fnic_dbgfs_t
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*/
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int fnic_get_trace_data(fnic_dbgfs_t *fnic_dbgfs_prt)
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{
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int rd_idx;
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int wr_idx;
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int len = 0;
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unsigned long flags;
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char str[KSYM_SYMBOL_LEN];
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struct timespec val;
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fnic_trace_data_t *tbp;
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spin_lock_irqsave(&fnic_trace_lock, flags);
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rd_idx = fnic_trace_entries.rd_idx;
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wr_idx = fnic_trace_entries.wr_idx;
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if (wr_idx < rd_idx) {
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while (1) {
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/* Start from read index @rd_idx */
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tbp = (fnic_trace_data_t *)
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fnic_trace_entries.page_offset[rd_idx];
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if (!tbp) {
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return 0;
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}
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/* Convert function pointer to function name */
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if (sizeof(unsigned long) < 8) {
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sprint_symbol(str, tbp->fnaddr.low);
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jiffies_to_timespec(tbp->timestamp.low, &val);
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} else {
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sprint_symbol(str, tbp->fnaddr.val);
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jiffies_to_timespec(tbp->timestamp.val, &val);
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}
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/*
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* Dump trace buffer entry to memory file
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* and increment read index @rd_idx
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*/
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len += snprintf(fnic_dbgfs_prt->buffer + len,
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(trace_max_pages * PAGE_SIZE * 3) - len,
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"%16lu.%16lu %-50s %8x %8x %16llx %16llx "
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"%16llx %16llx %16llx\n", val.tv_sec,
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val.tv_nsec, str, tbp->host_no, tbp->tag,
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tbp->data[0], tbp->data[1], tbp->data[2],
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tbp->data[3], tbp->data[4]);
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rd_idx++;
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/*
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* If rd_idx is reached to maximum trace entries
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* then move rd_idx to zero
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*/
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if (rd_idx > (fnic_max_trace_entries-1))
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rd_idx = 0;
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/*
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* Continure dumpping trace buffer entries into
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* memory file till rd_idx reaches write index
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*/
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if (rd_idx == wr_idx)
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break;
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}
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} else if (wr_idx > rd_idx) {
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while (1) {
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/* Start from read index @rd_idx */
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tbp = (fnic_trace_data_t *)
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fnic_trace_entries.page_offset[rd_idx];
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if (!tbp) {
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return 0;
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}
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/* Convert function pointer to function name */
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if (sizeof(unsigned long) < 8) {
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sprint_symbol(str, tbp->fnaddr.low);
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jiffies_to_timespec(tbp->timestamp.low, &val);
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} else {
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sprint_symbol(str, tbp->fnaddr.val);
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jiffies_to_timespec(tbp->timestamp.val, &val);
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}
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/*
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* Dump trace buffer entry to memory file
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* and increment read index @rd_idx
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*/
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len += snprintf(fnic_dbgfs_prt->buffer + len,
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(trace_max_pages * PAGE_SIZE * 3) - len,
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"%16lu.%16lu %-50s %8x %8x %16llx %16llx "
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"%16llx %16llx %16llx\n", val.tv_sec,
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val.tv_nsec, str, tbp->host_no, tbp->tag,
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tbp->data[0], tbp->data[1], tbp->data[2],
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tbp->data[3], tbp->data[4]);
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rd_idx++;
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/*
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* Continue dumpping trace buffer entries into
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* memory file till rd_idx reaches write index
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*/
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if (rd_idx == wr_idx)
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break;
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}
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}
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spin_unlock_irqrestore(&fnic_trace_lock, flags);
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return len;
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}
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/*
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* fnic_get_stats_data - Copy fnic stats buffer to a memory file
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* @fnic_dbgfs_t: pointer to debugfs fnic stats buffer
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*
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* Description:
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* This routine gathers the fnic stats debugfs data from the fnic_stats struct
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* and dumps it to stats_debug_info.
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*
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* Return Value:
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* This routine returns the amount of bytes that were dumped into
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* stats_debug_info
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*/
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int fnic_get_stats_data(struct stats_debug_info *debug,
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struct fnic_stats *stats)
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{
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int len = 0;
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int buf_size = debug->buf_size;
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struct timespec val1, val2;
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len = snprintf(debug->debug_buffer + len, buf_size - len,
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"------------------------------------------\n"
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"\t\tIO Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Active IOs: %lld\nMaximum Active IOs: %lld\n"
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"Number of IOs: %lld\nNumber of IO Completions: %lld\n"
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"Number of IO Failures: %lld\nNumber of IO NOT Found: %lld\n"
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"Number of Memory alloc Failures: %lld\n"
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"Number of IOREQ Null: %lld\n"
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"Number of SCSI cmd pointer Null: %lld\n",
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(u64)atomic64_read(&stats->io_stats.active_ios),
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(u64)atomic64_read(&stats->io_stats.max_active_ios),
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(u64)atomic64_read(&stats->io_stats.num_ios),
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(u64)atomic64_read(&stats->io_stats.io_completions),
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(u64)atomic64_read(&stats->io_stats.io_failures),
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(u64)atomic64_read(&stats->io_stats.io_not_found),
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(u64)atomic64_read(&stats->io_stats.alloc_failures),
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(u64)atomic64_read(&stats->io_stats.ioreq_null),
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(u64)atomic64_read(&stats->io_stats.sc_null));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tAbort Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Aborts: %lld\n"
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"Number of Abort Failures: %lld\n"
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"Number of Abort Driver Timeouts: %lld\n"
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"Number of Abort FW Timeouts: %lld\n"
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"Number of Abort IO NOT Found: %lld\n",
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(u64)atomic64_read(&stats->abts_stats.aborts),
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(u64)atomic64_read(&stats->abts_stats.abort_failures),
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(u64)atomic64_read(&stats->abts_stats.abort_drv_timeouts),
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(u64)atomic64_read(&stats->abts_stats.abort_fw_timeouts),
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(u64)atomic64_read(&stats->abts_stats.abort_io_not_found));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tTerminate Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Terminates: %lld\n"
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"Maximum Terminates: %lld\n"
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"Number of Terminate Driver Timeouts: %lld\n"
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"Number of Terminate FW Timeouts: %lld\n"
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"Number of Terminate IO NOT Found: %lld\n"
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"Number of Terminate Failures: %lld\n",
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(u64)atomic64_read(&stats->term_stats.terminates),
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(u64)atomic64_read(&stats->term_stats.max_terminates),
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(u64)atomic64_read(&stats->term_stats.terminate_drv_timeouts),
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(u64)atomic64_read(&stats->term_stats.terminate_fw_timeouts),
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(u64)atomic64_read(&stats->term_stats.terminate_io_not_found),
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(u64)atomic64_read(&stats->term_stats.terminate_failures));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tReset Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Device Resets: %lld\n"
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"Number of Device Reset Failures: %lld\n"
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"Number of Device Reset Aborts: %lld\n"
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"Number of Device Reset Timeouts: %lld\n"
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"Number of Device Reset Terminates: %lld\n"
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"Number of FW Resets: %lld\n"
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"Number of FW Reset Completions: %lld\n"
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"Number of FW Reset Failures: %lld\n"
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"Number of Fnic Reset: %lld\n"
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"Number of Fnic Reset Completions: %lld\n"
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"Number of Fnic Reset Failures: %lld\n",
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(u64)atomic64_read(&stats->reset_stats.device_resets),
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(u64)atomic64_read(&stats->reset_stats.device_reset_failures),
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(u64)atomic64_read(&stats->reset_stats.device_reset_aborts),
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(u64)atomic64_read(&stats->reset_stats.device_reset_timeouts),
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(u64)atomic64_read(
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&stats->reset_stats.device_reset_terminates),
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(u64)atomic64_read(&stats->reset_stats.fw_resets),
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(u64)atomic64_read(&stats->reset_stats.fw_reset_completions),
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(u64)atomic64_read(&stats->reset_stats.fw_reset_failures),
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(u64)atomic64_read(&stats->reset_stats.fnic_resets),
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(u64)atomic64_read(
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&stats->reset_stats.fnic_reset_completions),
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(u64)atomic64_read(&stats->reset_stats.fnic_reset_failures));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tFirmware Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Active FW Requests %lld\n"
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"Maximum FW Requests: %lld\n"
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"Number of FW out of resources: %lld\n"
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"Number of FW IO errors: %lld\n",
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(u64)atomic64_read(&stats->fw_stats.active_fw_reqs),
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(u64)atomic64_read(&stats->fw_stats.max_fw_reqs),
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(u64)atomic64_read(&stats->fw_stats.fw_out_of_resources),
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(u64)atomic64_read(&stats->fw_stats.io_fw_errs));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tVlan Discovery Statistics\n"
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"------------------------------------------\n");
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Number of Vlan Discovery Requests Sent %lld\n"
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"Vlan Response Received with no FCF VLAN ID: %lld\n"
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"No solicitations recvd after vlan set, expiry count: %lld\n"
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"Flogi rejects count: %lld\n",
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(u64)atomic64_read(&stats->vlan_stats.vlan_disc_reqs),
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(u64)atomic64_read(&stats->vlan_stats.resp_withno_vlanID),
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(u64)atomic64_read(&stats->vlan_stats.sol_expiry_count),
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(u64)atomic64_read(&stats->vlan_stats.flogi_rejects));
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"\n------------------------------------------\n"
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"\t\tOther Important Statistics\n"
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"------------------------------------------\n");
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jiffies_to_timespec(stats->misc_stats.last_isr_time, &val1);
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jiffies_to_timespec(stats->misc_stats.last_ack_time, &val2);
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len += snprintf(debug->debug_buffer + len, buf_size - len,
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"Last ISR time: %llu (%8lu.%8lu)\n"
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"Last ACK time: %llu (%8lu.%8lu)\n"
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"Number of ISRs: %lld\n"
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"Maximum CQ Entries: %lld\n"
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"Number of ACK index out of range: %lld\n"
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"Number of data count mismatch: %lld\n"
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"Number of FCPIO Timeouts: %lld\n"
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"Number of FCPIO Aborted: %lld\n"
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"Number of SGL Invalid: %lld\n"
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"Number of Copy WQ Alloc Failures for ABTs: %lld\n"
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"Number of Copy WQ Alloc Failures for Device Reset: %lld\n"
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"Number of Copy WQ Alloc Failures for IOs: %lld\n"
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"Number of no icmnd itmf Completions: %lld\n"
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"Number of QUEUE Fulls: %lld\n"
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"Number of rport not ready: %lld\n"
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"Number of receive frame errors: %lld\n",
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(u64)stats->misc_stats.last_isr_time,
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val1.tv_sec, val1.tv_nsec,
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(u64)stats->misc_stats.last_ack_time,
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val2.tv_sec, val2.tv_nsec,
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(u64)atomic64_read(&stats->misc_stats.isr_count),
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(u64)atomic64_read(&stats->misc_stats.max_cq_entries),
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(u64)atomic64_read(&stats->misc_stats.ack_index_out_of_range),
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(u64)atomic64_read(&stats->misc_stats.data_count_mismatch),
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(u64)atomic64_read(&stats->misc_stats.fcpio_timeout),
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(u64)atomic64_read(&stats->misc_stats.fcpio_aborted),
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(u64)atomic64_read(&stats->misc_stats.sgl_invalid),
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(u64)atomic64_read(
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&stats->misc_stats.abts_cpwq_alloc_failures),
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(u64)atomic64_read(
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&stats->misc_stats.devrst_cpwq_alloc_failures),
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(u64)atomic64_read(&stats->misc_stats.io_cpwq_alloc_failures),
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(u64)atomic64_read(&stats->misc_stats.no_icmnd_itmf_cmpls),
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(u64)atomic64_read(&stats->misc_stats.queue_fulls),
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(u64)atomic64_read(&stats->misc_stats.rport_not_ready),
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(u64)atomic64_read(&stats->misc_stats.frame_errors));
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return len;
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}
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/*
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* fnic_trace_buf_init - Initialize fnic trace buffer logging facility
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*
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* Description:
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* Initialize trace buffer data structure by allocating required memory and
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* setting page_offset information for every trace entry by adding trace entry
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* length to previous page_offset value.
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*/
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int fnic_trace_buf_init(void)
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{
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unsigned long fnic_buf_head;
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int i;
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int err = 0;
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trace_max_pages = fnic_trace_max_pages;
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fnic_max_trace_entries = (trace_max_pages * PAGE_SIZE)/
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FNIC_ENTRY_SIZE_BYTES;
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fnic_trace_buf_p = (unsigned long)vmalloc((trace_max_pages * PAGE_SIZE));
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if (!fnic_trace_buf_p) {
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printk(KERN_ERR PFX "Failed to allocate memory "
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"for fnic_trace_buf_p\n");
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err = -ENOMEM;
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goto err_fnic_trace_buf_init;
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}
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memset((void *)fnic_trace_buf_p, 0, (trace_max_pages * PAGE_SIZE));
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fnic_trace_entries.page_offset = vmalloc(fnic_max_trace_entries *
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sizeof(unsigned long));
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if (!fnic_trace_entries.page_offset) {
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printk(KERN_ERR PFX "Failed to allocate memory for"
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" page_offset\n");
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if (fnic_trace_buf_p) {
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vfree((void *)fnic_trace_buf_p);
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fnic_trace_buf_p = 0;
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}
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err = -ENOMEM;
|
|
goto err_fnic_trace_buf_init;
|
|
}
|
|
memset((void *)fnic_trace_entries.page_offset, 0,
|
|
(fnic_max_trace_entries * sizeof(unsigned long)));
|
|
fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
|
|
fnic_buf_head = fnic_trace_buf_p;
|
|
|
|
/*
|
|
* Set page_offset field of fnic_trace_entries struct by
|
|
* calculating memory location for every trace entry using
|
|
* length of each trace entry
|
|
*/
|
|
for (i = 0; i < fnic_max_trace_entries; i++) {
|
|
fnic_trace_entries.page_offset[i] = fnic_buf_head;
|
|
fnic_buf_head += FNIC_ENTRY_SIZE_BYTES;
|
|
}
|
|
err = fnic_trace_debugfs_init();
|
|
if (err < 0) {
|
|
printk(KERN_ERR PFX "Failed to initialize debugfs for tracing\n");
|
|
goto err_fnic_trace_debugfs_init;
|
|
}
|
|
printk(KERN_INFO PFX "Successfully Initialized Trace Buffer\n");
|
|
return err;
|
|
err_fnic_trace_debugfs_init:
|
|
fnic_trace_free();
|
|
err_fnic_trace_buf_init:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* fnic_trace_free - Free memory of fnic trace data structures.
|
|
*/
|
|
void fnic_trace_free(void)
|
|
{
|
|
fnic_tracing_enabled = 0;
|
|
fnic_trace_debugfs_terminate();
|
|
if (fnic_trace_entries.page_offset) {
|
|
vfree((void *)fnic_trace_entries.page_offset);
|
|
fnic_trace_entries.page_offset = NULL;
|
|
}
|
|
if (fnic_trace_buf_p) {
|
|
vfree((void *)fnic_trace_buf_p);
|
|
fnic_trace_buf_p = 0;
|
|
}
|
|
printk(KERN_INFO PFX "Successfully Freed Trace Buffer\n");
|
|
}
|