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736 lines
20 KiB
736 lines
20 KiB
/* |
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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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|
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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 <linux/vmalloc.h> |
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#include "fnic.h" |
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|
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static struct dentry *fnic_trace_debugfs_root; |
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static struct dentry *fnic_trace_debugfs_file; |
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static struct dentry *fnic_trace_enable; |
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static struct dentry *fnic_stats_debugfs_root; |
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|
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static struct dentry *fnic_fc_trace_debugfs_file; |
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static struct dentry *fnic_fc_rdata_trace_debugfs_file; |
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static struct dentry *fnic_fc_trace_enable; |
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static struct dentry *fnic_fc_trace_clear; |
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|
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struct fc_trace_flag_type { |
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u8 fc_row_file; |
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u8 fc_normal_file; |
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u8 fnic_trace; |
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u8 fc_trace; |
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u8 fc_clear; |
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}; |
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|
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static struct fc_trace_flag_type *fc_trc_flag; |
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|
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/* |
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* fnic_debugfs_init - Initialize debugfs for fnic debug logging |
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* |
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* Description: |
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* When Debugfs is configured this routine sets up the fnic debugfs |
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* file system. If not already created, this routine will create 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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int fnic_debugfs_init(void) |
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{ |
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fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL); |
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|
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fnic_stats_debugfs_root = debugfs_create_dir("statistics", |
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fnic_trace_debugfs_root); |
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|
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/* Allocate memory to structure */ |
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fc_trc_flag = vmalloc(sizeof(struct fc_trace_flag_type)); |
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|
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if (fc_trc_flag) { |
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fc_trc_flag->fc_row_file = 0; |
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fc_trc_flag->fc_normal_file = 1; |
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fc_trc_flag->fnic_trace = 2; |
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fc_trc_flag->fc_trace = 3; |
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fc_trc_flag->fc_clear = 4; |
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} |
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|
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return 0; |
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} |
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|
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/* |
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* fnic_debugfs_terminate - Tear down debugfs infrastructure |
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* |
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* Description: |
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* When Debugfs is configured this routine removes debugfs file system |
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* elements that are specific to fnic. |
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*/ |
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void fnic_debugfs_terminate(void) |
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{ |
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debugfs_remove(fnic_stats_debugfs_root); |
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fnic_stats_debugfs_root = NULL; |
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|
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debugfs_remove(fnic_trace_debugfs_root); |
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fnic_trace_debugfs_root = NULL; |
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|
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if (fc_trc_flag) |
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vfree(fc_trc_flag); |
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} |
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|
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/* |
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* fnic_trace_ctrl_read - |
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* Read trace_enable ,fc_trace_enable |
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* or fc_trace_clear debugfs file |
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* @filp: The file pointer to read from. |
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* @ubuf: The buffer to copy 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 from. |
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* |
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* Description: |
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* This routine reads value of variable fnic_tracing_enabled or |
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* fnic_fc_tracing_enabled or fnic_fc_trace_cleared |
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* and stores into local @buf. |
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* It will start reading file at @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 fnic_trace_ctrl_read(struct file *filp, |
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char __user *ubuf, |
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size_t cnt, loff_t *ppos) |
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{ |
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char buf[64]; |
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int len; |
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u8 *trace_type; |
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len = 0; |
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trace_type = (u8 *)filp->private_data; |
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if (*trace_type == fc_trc_flag->fnic_trace) |
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len = sprintf(buf, "%d\n", fnic_tracing_enabled); |
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else if (*trace_type == fc_trc_flag->fc_trace) |
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len = sprintf(buf, "%d\n", fnic_fc_tracing_enabled); |
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else if (*trace_type == fc_trc_flag->fc_clear) |
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len = sprintf(buf, "%d\n", fnic_fc_trace_cleared); |
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else |
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pr_err("fnic: Cannot read to any debugfs file\n"); |
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|
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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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/* |
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* fnic_trace_ctrl_write - |
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* Write to trace_enable, fc_trace_enable or |
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* fc_trace_clear 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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* sets fc_trace_enable ,tracing_enable or fnic_fc_trace_cleared |
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* value as per user input. |
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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 fnic_trace_ctrl_write(struct file *filp, |
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const char __user *ubuf, |
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size_t cnt, loff_t *ppos) |
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{ |
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char buf[64]; |
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unsigned long val; |
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int ret; |
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u8 *trace_type; |
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trace_type = (u8 *)filp->private_data; |
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|
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if (cnt >= sizeof(buf)) |
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return -EINVAL; |
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|
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if (copy_from_user(&buf, ubuf, cnt)) |
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return -EFAULT; |
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|
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buf[cnt] = 0; |
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|
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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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if (*trace_type == fc_trc_flag->fnic_trace) |
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fnic_tracing_enabled = val; |
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else if (*trace_type == fc_trc_flag->fc_trace) |
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fnic_fc_tracing_enabled = val; |
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else if (*trace_type == fc_trc_flag->fc_clear) |
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fnic_fc_trace_cleared = val; |
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else |
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pr_err("fnic: cannot write to any debugfs file\n"); |
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|
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(*ppos)++; |
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return cnt; |
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} |
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static const struct file_operations fnic_trace_ctrl_fops = { |
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.owner = THIS_MODULE, |
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.open = simple_open, |
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.read = fnic_trace_ctrl_read, |
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.write = fnic_trace_ctrl_write, |
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}; |
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|
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/* |
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* fnic_trace_debugfs_open - Open the fnic trace log |
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* @inode: The inode pointer |
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* @file: The file pointer to attach the log output |
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* |
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* Description: |
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* This routine is the entry point for the debugfs open file operation. |
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* It allocates the necessary buffer for the log, fills the buffer from |
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* the in-memory log and then returns a pointer to that log in |
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* the private_data field in @file. |
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* |
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* Returns: |
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* This function returns zero if successful. On error it will return |
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* a negative error value. |
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*/ |
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static int fnic_trace_debugfs_open(struct inode *inode, |
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struct file *file) |
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{ |
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fnic_dbgfs_t *fnic_dbg_prt; |
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u8 *rdata_ptr; |
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rdata_ptr = (u8 *)inode->i_private; |
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fnic_dbg_prt = kzalloc(sizeof(fnic_dbgfs_t), GFP_KERNEL); |
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if (!fnic_dbg_prt) |
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return -ENOMEM; |
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if (*rdata_ptr == fc_trc_flag->fnic_trace) { |
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fnic_dbg_prt->buffer = vmalloc(array3_size(3, trace_max_pages, |
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PAGE_SIZE)); |
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if (!fnic_dbg_prt->buffer) { |
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kfree(fnic_dbg_prt); |
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return -ENOMEM; |
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} |
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memset((void *)fnic_dbg_prt->buffer, 0, |
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3 * (trace_max_pages * PAGE_SIZE)); |
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fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt); |
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} else { |
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fnic_dbg_prt->buffer = |
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vmalloc(array3_size(3, fnic_fc_trace_max_pages, |
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PAGE_SIZE)); |
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if (!fnic_dbg_prt->buffer) { |
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kfree(fnic_dbg_prt); |
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return -ENOMEM; |
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} |
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memset((void *)fnic_dbg_prt->buffer, 0, |
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3 * (fnic_fc_trace_max_pages * PAGE_SIZE)); |
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fnic_dbg_prt->buffer_len = |
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fnic_fc_trace_get_data(fnic_dbg_prt, *rdata_ptr); |
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} |
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file->private_data = fnic_dbg_prt; |
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return 0; |
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} |
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|
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/* |
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* fnic_trace_debugfs_lseek - Seek through a debugfs file |
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* @file: The file pointer to seek through. |
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* @offset: The offset to seek to or the amount to seek by. |
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* @howto: Indicates how to seek. |
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* |
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* Description: |
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* This routine is the entry point for the debugfs lseek file operation. |
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* The @howto parameter indicates whether @offset is the offset to directly |
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* seek to, or if it is a value to seek forward or reverse by. This function |
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* figures out what the new offset of the debugfs file will be and assigns |
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* that value to the f_pos field of @file. |
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* |
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* Returns: |
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* This function returns the new offset if successful and returns a negative |
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* error if unable to process the seek. |
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*/ |
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static loff_t fnic_trace_debugfs_lseek(struct file *file, |
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loff_t offset, |
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int howto) |
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{ |
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fnic_dbgfs_t *fnic_dbg_prt = file->private_data; |
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return fixed_size_llseek(file, offset, howto, |
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fnic_dbg_prt->buffer_len); |
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} |
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|
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/* |
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* fnic_trace_debugfs_read - Read a debugfs file |
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* @file: The file pointer to read from. |
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* @ubuf: The buffer to copy the data to. |
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* @nbytes: The number of bytes to read. |
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* @pos: The position in the file to start reading from. |
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* |
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* Description: |
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* This routine reads data from the buffer indicated in the private_data |
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* field of @file. It will start reading at @pos and copy up to @nbytes of |
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* data to @ubuf. |
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* |
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* Returns: |
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* This function returns the amount of data that was read (this could be |
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* less than @nbytes if the end of the file was reached). |
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*/ |
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static ssize_t fnic_trace_debugfs_read(struct file *file, |
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char __user *ubuf, |
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size_t nbytes, |
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loff_t *pos) |
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{ |
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fnic_dbgfs_t *fnic_dbg_prt = file->private_data; |
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int rc = 0; |
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rc = simple_read_from_buffer(ubuf, nbytes, pos, |
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fnic_dbg_prt->buffer, |
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fnic_dbg_prt->buffer_len); |
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return rc; |
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} |
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|
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/* |
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* fnic_trace_debugfs_release - Release the buffer used to store |
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* debugfs file data |
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* @inode: The inode pointer |
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* @file: The file pointer that contains the buffer to release |
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* |
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* Description: |
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* This routine frees the buffer that was allocated when the debugfs |
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* file was opened. |
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* |
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* Returns: |
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* This function returns zero. |
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*/ |
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static int fnic_trace_debugfs_release(struct inode *inode, |
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struct file *file) |
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{ |
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fnic_dbgfs_t *fnic_dbg_prt = file->private_data; |
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|
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vfree(fnic_dbg_prt->buffer); |
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kfree(fnic_dbg_prt); |
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return 0; |
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} |
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static const struct file_operations fnic_trace_debugfs_fops = { |
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.owner = THIS_MODULE, |
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.open = fnic_trace_debugfs_open, |
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.llseek = fnic_trace_debugfs_lseek, |
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.read = fnic_trace_debugfs_read, |
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.release = fnic_trace_debugfs_release, |
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}; |
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|
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/* |
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* fnic_trace_debugfs_init - Initialize debugfs for fnic trace logging |
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* |
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* Description: |
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* When Debugfs is configured this routine sets up the fnic debugfs |
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* file system. If not already created, this routine will create the |
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* create file trace to log fnic trace buffer output into debugfs and |
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* it will also create file trace_enable to control enable/disable of |
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* trace logging into trace buffer. |
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*/ |
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void fnic_trace_debugfs_init(void) |
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{ |
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fnic_trace_enable = debugfs_create_file("tracing_enable", |
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S_IFREG|S_IRUGO|S_IWUSR, |
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fnic_trace_debugfs_root, |
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&(fc_trc_flag->fnic_trace), |
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&fnic_trace_ctrl_fops); |
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|
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fnic_trace_debugfs_file = debugfs_create_file("trace", |
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S_IFREG|S_IRUGO|S_IWUSR, |
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fnic_trace_debugfs_root, |
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&(fc_trc_flag->fnic_trace), |
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&fnic_trace_debugfs_fops); |
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} |
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|
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/* |
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* fnic_trace_debugfs_terminate - Tear down debugfs infrastructure |
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* |
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* Description: |
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* When Debugfs is configured this routine removes debugfs file system |
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* elements that are specific to fnic trace logging. |
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*/ |
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void fnic_trace_debugfs_terminate(void) |
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{ |
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debugfs_remove(fnic_trace_debugfs_file); |
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fnic_trace_debugfs_file = NULL; |
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|
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debugfs_remove(fnic_trace_enable); |
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fnic_trace_enable = NULL; |
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} |
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|
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/* |
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* fnic_fc_trace_debugfs_init - |
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* Initialize debugfs for fnic control frame trace logging |
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* |
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* Description: |
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* When Debugfs is configured this routine sets up the fnic_fc debugfs |
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* file system. If not already created, this routine will create the |
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* create file trace to log fnic fc trace buffer output into debugfs and |
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* it will also create file fc_trace_enable to control enable/disable of |
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* trace logging into trace buffer. |
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*/ |
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|
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void fnic_fc_trace_debugfs_init(void) |
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{ |
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fnic_fc_trace_enable = debugfs_create_file("fc_trace_enable", |
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S_IFREG|S_IRUGO|S_IWUSR, |
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fnic_trace_debugfs_root, |
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&(fc_trc_flag->fc_trace), |
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&fnic_trace_ctrl_fops); |
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|
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fnic_fc_trace_clear = debugfs_create_file("fc_trace_clear", |
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S_IFREG|S_IRUGO|S_IWUSR, |
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fnic_trace_debugfs_root, |
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&(fc_trc_flag->fc_clear), |
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&fnic_trace_ctrl_fops); |
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|
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fnic_fc_rdata_trace_debugfs_file = |
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debugfs_create_file("fc_trace_rdata", |
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S_IFREG|S_IRUGO|S_IWUSR, |
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fnic_trace_debugfs_root, |
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&(fc_trc_flag->fc_normal_file), |
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&fnic_trace_debugfs_fops); |
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|
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fnic_fc_trace_debugfs_file = |
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debugfs_create_file("fc_trace", |
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S_IFREG|S_IRUGO|S_IWUSR, |
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fnic_trace_debugfs_root, |
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&(fc_trc_flag->fc_row_file), |
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&fnic_trace_debugfs_fops); |
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} |
|
|
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/* |
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* fnic_fc_trace_debugfs_terminate - Tear down debugfs infrastructure |
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* |
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* Description: |
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* When Debugfs is configured this routine removes debugfs file system |
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* elements that are specific to fnic_fc trace logging. |
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*/ |
|
|
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void fnic_fc_trace_debugfs_terminate(void) |
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{ |
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debugfs_remove(fnic_fc_trace_debugfs_file); |
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fnic_fc_trace_debugfs_file = NULL; |
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|
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debugfs_remove(fnic_fc_rdata_trace_debugfs_file); |
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fnic_fc_rdata_trace_debugfs_file = NULL; |
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|
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debugfs_remove(fnic_fc_trace_enable); |
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fnic_fc_trace_enable = NULL; |
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|
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debugfs_remove(fnic_fc_trace_clear); |
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fnic_fc_trace_clear = NULL; |
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} |
|
|
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/* |
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* fnic_reset_stats_open - Open the reset_stats file |
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* @inode: The inode pointer. |
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* @file: The file pointer to attach the stats reset flag. |
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* |
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* Description: |
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* This routine opens a debugsfs file reset_stats and stores i_private data |
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* to debug structure to retrieve later for while performing other |
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* file oprations. |
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* |
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* Returns: |
|
* This function returns zero if successful. |
|
*/ |
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static int fnic_reset_stats_open(struct inode *inode, struct file *file) |
|
{ |
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struct stats_debug_info *debug; |
|
|
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debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL); |
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if (!debug) |
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return -ENOMEM; |
|
|
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debug->i_private = inode->i_private; |
|
|
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file->private_data = debug; |
|
|
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return 0; |
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} |
|
|
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/* |
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* fnic_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 to copy 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 from. |
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* |
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* Description: |
|
* This routine reads value of variable reset_stats |
|
* and stores into local @buf. It will start reading file at @ppos and |
|
* copy up to @cnt of data to @ubuf from @buf. |
|
* |
|
* Returns: |
|
* This function returns the amount of data that was read. |
|
*/ |
|
static ssize_t fnic_reset_stats_read(struct file *file, |
|
char __user *ubuf, |
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size_t cnt, loff_t *ppos) |
|
{ |
|
struct stats_debug_info *debug = file->private_data; |
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struct fnic *fnic = (struct fnic *)debug->i_private; |
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char buf[64]; |
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int len; |
|
|
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len = sprintf(buf, "%u\n", fnic->reset_stats); |
|
|
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return simple_read_from_buffer(ubuf, cnt, ppos, buf, len); |
|
} |
|
|
|
/* |
|
* fnic_reset_stats_write - Write to reset_stats debugfs file |
|
* @filp: The file pointer to write from. |
|
* @ubuf: The buffer to copy the data from. |
|
* @cnt: The number of bytes to write. |
|
* @ppos: The position in the file to start writing to. |
|
* |
|
* Description: |
|
* This routine writes data from user buffer @ubuf to buffer @buf and |
|
* resets cumulative stats of fnic. |
|
* |
|
* Returns: |
|
* This function returns the amount of data that was written. |
|
*/ |
|
static ssize_t fnic_reset_stats_write(struct file *file, |
|
const char __user *ubuf, |
|
size_t cnt, loff_t *ppos) |
|
{ |
|
struct stats_debug_info *debug = file->private_data; |
|
struct fnic *fnic = (struct fnic *)debug->i_private; |
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struct fnic_stats *stats = &fnic->fnic_stats; |
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u64 *io_stats_p = (u64 *)&stats->io_stats; |
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u64 *fw_stats_p = (u64 *)&stats->fw_stats; |
|
char buf[64]; |
|
unsigned long val; |
|
int ret; |
|
|
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if (cnt >= sizeof(buf)) |
|
return -EINVAL; |
|
|
|
if (copy_from_user(&buf, ubuf, cnt)) |
|
return -EFAULT; |
|
|
|
buf[cnt] = 0; |
|
|
|
ret = kstrtoul(buf, 10, &val); |
|
if (ret < 0) |
|
return ret; |
|
|
|
fnic->reset_stats = val; |
|
|
|
if (fnic->reset_stats) { |
|
/* Skip variable is used to avoid descrepancies to Num IOs |
|
* and IO Completions stats. Skip incrementing No IO Compls |
|
* for pending active IOs after reset stats |
|
*/ |
|
atomic64_set(&fnic->io_cmpl_skip, |
|
atomic64_read(&stats->io_stats.active_ios)); |
|
memset(&stats->abts_stats, 0, sizeof(struct abort_stats)); |
|
memset(&stats->term_stats, 0, |
|
sizeof(struct terminate_stats)); |
|
memset(&stats->reset_stats, 0, sizeof(struct reset_stats)); |
|
memset(&stats->misc_stats, 0, sizeof(struct misc_stats)); |
|
memset(&stats->vlan_stats, 0, sizeof(struct vlan_stats)); |
|
memset(io_stats_p+1, 0, |
|
sizeof(struct io_path_stats) - sizeof(u64)); |
|
memset(fw_stats_p+1, 0, |
|
sizeof(struct fw_stats) - sizeof(u64)); |
|
ktime_get_real_ts64(&stats->stats_timestamps.last_reset_time); |
|
} |
|
|
|
(*ppos)++; |
|
return cnt; |
|
} |
|
|
|
/* |
|
* fnic_reset_stats_release - Release the buffer used to store |
|
* debugfs file data |
|
* @inode: The inode pointer |
|
* @file: The file pointer that contains the buffer to release |
|
* |
|
* Description: |
|
* This routine frees the buffer that was allocated when the debugfs |
|
* file was opened. |
|
* |
|
* Returns: |
|
* This function returns zero. |
|
*/ |
|
static int fnic_reset_stats_release(struct inode *inode, |
|
struct file *file) |
|
{ |
|
struct stats_debug_info *debug = file->private_data; |
|
kfree(debug); |
|
return 0; |
|
} |
|
|
|
/* |
|
* fnic_stats_debugfs_open - Open the stats file for specific host |
|
* and get fnic stats. |
|
* @inode: The inode pointer. |
|
* @file: The file pointer to attach the specific host statistics. |
|
* |
|
* Description: |
|
* This routine opens a debugsfs file stats of specific host and print |
|
* fnic stats. |
|
* |
|
* Returns: |
|
* This function returns zero if successful. |
|
*/ |
|
static int fnic_stats_debugfs_open(struct inode *inode, |
|
struct file *file) |
|
{ |
|
struct fnic *fnic = inode->i_private; |
|
struct fnic_stats *fnic_stats = &fnic->fnic_stats; |
|
struct stats_debug_info *debug; |
|
int buf_size = 2 * PAGE_SIZE; |
|
|
|
debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL); |
|
if (!debug) |
|
return -ENOMEM; |
|
|
|
debug->debug_buffer = vmalloc(buf_size); |
|
if (!debug->debug_buffer) { |
|
kfree(debug); |
|
return -ENOMEM; |
|
} |
|
|
|
debug->buf_size = buf_size; |
|
memset((void *)debug->debug_buffer, 0, buf_size); |
|
debug->buffer_len = fnic_get_stats_data(debug, fnic_stats); |
|
|
|
file->private_data = debug; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* fnic_stats_debugfs_read - Read a debugfs file |
|
* @file: The file pointer to read from. |
|
* @ubuf: The buffer to copy the data to. |
|
* @nbytes: The number of bytes to read. |
|
* @pos: The position in the file to start reading from. |
|
* |
|
* Description: |
|
* This routine reads data from the buffer indicated in the private_data |
|
* field of @file. It will start reading at @pos and copy up to @nbytes of |
|
* data to @ubuf. |
|
* |
|
* Returns: |
|
* This function returns the amount of data that was read (this could be |
|
* less than @nbytes if the end of the file was reached). |
|
*/ |
|
static ssize_t fnic_stats_debugfs_read(struct file *file, |
|
char __user *ubuf, |
|
size_t nbytes, |
|
loff_t *pos) |
|
{ |
|
struct stats_debug_info *debug = file->private_data; |
|
int rc = 0; |
|
rc = simple_read_from_buffer(ubuf, nbytes, pos, |
|
debug->debug_buffer, |
|
debug->buffer_len); |
|
return rc; |
|
} |
|
|
|
/* |
|
* fnic_stats_stats_release - Release the buffer used to store |
|
* debugfs file data |
|
* @inode: The inode pointer |
|
* @file: The file pointer that contains the buffer to release |
|
* |
|
* Description: |
|
* This routine frees the buffer that was allocated when the debugfs |
|
* file was opened. |
|
* |
|
* Returns: |
|
* This function returns zero. |
|
*/ |
|
static int fnic_stats_debugfs_release(struct inode *inode, |
|
struct file *file) |
|
{ |
|
struct stats_debug_info *debug = file->private_data; |
|
vfree(debug->debug_buffer); |
|
kfree(debug); |
|
return 0; |
|
} |
|
|
|
static const struct file_operations fnic_stats_debugfs_fops = { |
|
.owner = THIS_MODULE, |
|
.open = fnic_stats_debugfs_open, |
|
.read = fnic_stats_debugfs_read, |
|
.release = fnic_stats_debugfs_release, |
|
}; |
|
|
|
static const struct file_operations fnic_reset_debugfs_fops = { |
|
.owner = THIS_MODULE, |
|
.open = fnic_reset_stats_open, |
|
.read = fnic_reset_stats_read, |
|
.write = fnic_reset_stats_write, |
|
.release = fnic_reset_stats_release, |
|
}; |
|
|
|
/* |
|
* fnic_stats_init - Initialize stats struct and create stats file per fnic |
|
* |
|
* Description: |
|
* When Debugfs is configured this routine sets up the stats file per fnic |
|
* It will create file stats and reset_stats under statistics/host# directory |
|
* to log per fnic stats. |
|
*/ |
|
void fnic_stats_debugfs_init(struct fnic *fnic) |
|
{ |
|
char name[16]; |
|
|
|
snprintf(name, sizeof(name), "host%d", fnic->lport->host->host_no); |
|
|
|
fnic->fnic_stats_debugfs_host = debugfs_create_dir(name, |
|
fnic_stats_debugfs_root); |
|
|
|
fnic->fnic_stats_debugfs_file = debugfs_create_file("stats", |
|
S_IFREG|S_IRUGO|S_IWUSR, |
|
fnic->fnic_stats_debugfs_host, |
|
fnic, |
|
&fnic_stats_debugfs_fops); |
|
|
|
fnic->fnic_reset_debugfs_file = debugfs_create_file("reset_stats", |
|
S_IFREG|S_IRUGO|S_IWUSR, |
|
fnic->fnic_stats_debugfs_host, |
|
fnic, |
|
&fnic_reset_debugfs_fops); |
|
} |
|
|
|
/* |
|
* fnic_stats_debugfs_remove - Tear down debugfs infrastructure of stats |
|
* |
|
* Description: |
|
* When Debugfs is configured this routine removes debugfs file system |
|
* elements that are specific to fnic stats. |
|
*/ |
|
void fnic_stats_debugfs_remove(struct fnic *fnic) |
|
{ |
|
if (!fnic) |
|
return; |
|
|
|
debugfs_remove(fnic->fnic_stats_debugfs_file); |
|
fnic->fnic_stats_debugfs_file = NULL; |
|
|
|
debugfs_remove(fnic->fnic_reset_debugfs_file); |
|
fnic->fnic_reset_debugfs_file = NULL; |
|
|
|
debugfs_remove(fnic->fnic_stats_debugfs_host); |
|
fnic->fnic_stats_debugfs_host = NULL; |
|
}
|
|
|