mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 04:16:39 +07:00
1a84db567a
This patch fix spelling typo in printk. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
837 lines
22 KiB
C
837 lines
22 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/errno.h>
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#include <linux/debugfs.h>
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#include "fnic.h"
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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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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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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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static struct fc_trace_flag_type *fc_trc_flag;
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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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int rc = -1;
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fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL);
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if (!fnic_trace_debugfs_root) {
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printk(KERN_DEBUG "Cannot create debugfs root\n");
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return rc;
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}
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if (!fnic_trace_debugfs_root) {
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printk(KERN_DEBUG
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"fnic root directory doesn't exist in debugfs\n");
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return rc;
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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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if (!fnic_stats_debugfs_root) {
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printk(KERN_DEBUG "Cannot create Statistics directory\n");
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return rc;
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}
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/* Allocate memory to structure */
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fc_trc_flag = (struct fc_trace_flag_type *)
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vmalloc(sizeof(struct fc_trace_flag_type));
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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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rc = 0;
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return rc;
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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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debugfs_remove(fnic_trace_debugfs_root);
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fnic_trace_debugfs_root = NULL;
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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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* fnic_trace_ctrl_open - Open the trace_enable file for fnic_trace
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* Or Open fc_trace_enable file for fc_trace
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* @inode: The inode pointer.
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* @file: The file pointer to attach the trace enable/disable flag.
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*
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* Description:
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* This routine opens a debugsfs file trace_enable or fc_trace_enable.
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*
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* Returns:
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* This function returns zero if successful.
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*/
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static int fnic_trace_ctrl_open(struct inode *inode, struct file *filp)
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{
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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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* 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, "%u\n", fnic_tracing_enabled);
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else if (*trace_type == fc_trc_flag->fc_trace)
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len = sprintf(buf, "%u\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, "%u\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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return simple_read_from_buffer(ubuf, cnt, ppos, buf, len);
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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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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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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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(*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 = fnic_trace_ctrl_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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* 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(3 *
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(trace_max_pages * 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(3 * (fnic_fc_trace_max_pages * 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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* 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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* 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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* 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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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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* 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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int fnic_trace_debugfs_init(void)
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{
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int rc = -1;
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if (!fnic_trace_debugfs_root) {
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printk(KERN_DEBUG
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"FNIC Debugfs root directory doesn't exist\n");
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return rc;
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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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if (!fnic_trace_enable) {
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printk(KERN_DEBUG
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"Cannot create trace_enable file under debugfs\n");
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return rc;
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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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if (!fnic_trace_debugfs_file) {
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printk(KERN_DEBUG
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"Cannot create trace file under debugfs\n");
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return rc;
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}
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rc = 0;
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return rc;
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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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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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* 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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int fnic_fc_trace_debugfs_init(void)
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{
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int rc = -1;
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if (!fnic_trace_debugfs_root) {
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pr_err("fnic:Debugfs root directory doesn't exist\n");
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return rc;
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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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if (!fnic_fc_trace_enable) {
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pr_err("fnic: Failed create fc_trace_enable file\n");
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return rc;
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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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if (!fnic_fc_trace_clear) {
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pr_err("fnic: Failed to create fc_trace_enable file\n");
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return rc;
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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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if (!fnic_fc_rdata_trace_debugfs_file) {
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pr_err("fnic: Failed create fc_rdata_trace file\n");
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return rc;
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}
|
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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);
|
|
|
|
if (!fnic_fc_trace_debugfs_file) {
|
|
pr_err("fnic: Failed to create fc_trace file\n");
|
|
return rc;
|
|
}
|
|
rc = 0;
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* fnic_fc_trace_debugfs_terminate - Tear down debugfs infrastructure
|
|
*
|
|
* Description:
|
|
* When Debugfs is configured this routine removes debugfs file system
|
|
* elements that are specific to fnic_fc trace logging.
|
|
*/
|
|
|
|
void fnic_fc_trace_debugfs_terminate(void)
|
|
{
|
|
debugfs_remove(fnic_fc_trace_debugfs_file);
|
|
fnic_fc_trace_debugfs_file = NULL;
|
|
|
|
debugfs_remove(fnic_fc_rdata_trace_debugfs_file);
|
|
fnic_fc_rdata_trace_debugfs_file = NULL;
|
|
|
|
debugfs_remove(fnic_fc_trace_enable);
|
|
fnic_fc_trace_enable = NULL;
|
|
|
|
debugfs_remove(fnic_fc_trace_clear);
|
|
fnic_fc_trace_clear = NULL;
|
|
}
|
|
|
|
/*
|
|
* fnic_reset_stats_open - Open the reset_stats file
|
|
* @inode: The inode pointer.
|
|
* @file: The file pointer to attach the stats reset flag.
|
|
*
|
|
* Description:
|
|
* This routine opens a debugsfs file reset_stats and stores i_private data
|
|
* to debug structure to retrieve later for while performing other
|
|
* file oprations.
|
|
*
|
|
* Returns:
|
|
* This function returns zero if successful.
|
|
*/
|
|
static int fnic_reset_stats_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct stats_debug_info *debug;
|
|
|
|
debug = kzalloc(sizeof(struct stats_debug_info), GFP_KERNEL);
|
|
if (!debug)
|
|
return -ENOMEM;
|
|
|
|
debug->i_private = inode->i_private;
|
|
|
|
file->private_data = debug;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* fnic_reset_stats_read - Read a reset_stats debugfs file
|
|
* @filp: The file pointer to read from.
|
|
* @ubuf: The buffer to copy the data to.
|
|
* @cnt: The number of bytes to read.
|
|
* @ppos: The position in the file to start reading from.
|
|
*
|
|
* 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,
|
|
size_t cnt, loff_t *ppos)
|
|
{
|
|
struct stats_debug_info *debug = file->private_data;
|
|
struct fnic *fnic = (struct fnic *)debug->i_private;
|
|
char buf[64];
|
|
int len;
|
|
|
|
len = sprintf(buf, "%u\n", fnic->reset_stats);
|
|
|
|
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;
|
|
struct fnic_stats *stats = &fnic->fnic_stats;
|
|
u64 *io_stats_p = (u64 *)&stats->io_stats;
|
|
u64 *fw_stats_p = (u64 *)&stats->fw_stats;
|
|
char buf[64];
|
|
unsigned long val;
|
|
int ret;
|
|
|
|
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));
|
|
}
|
|
|
|
(*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.
|
|
*/
|
|
int fnic_stats_debugfs_init(struct fnic *fnic)
|
|
{
|
|
int rc = -1;
|
|
char name[16];
|
|
|
|
snprintf(name, sizeof(name), "host%d", fnic->lport->host->host_no);
|
|
|
|
if (!fnic_stats_debugfs_root) {
|
|
printk(KERN_DEBUG "fnic_stats root doesn't exist\n");
|
|
return rc;
|
|
}
|
|
fnic->fnic_stats_debugfs_host = debugfs_create_dir(name,
|
|
fnic_stats_debugfs_root);
|
|
if (!fnic->fnic_stats_debugfs_host) {
|
|
printk(KERN_DEBUG "Cannot create host directory\n");
|
|
return rc;
|
|
}
|
|
|
|
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);
|
|
if (!fnic->fnic_stats_debugfs_file) {
|
|
printk(KERN_DEBUG "Cannot create host stats file\n");
|
|
return rc;
|
|
}
|
|
|
|
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);
|
|
if (!fnic->fnic_reset_debugfs_file) {
|
|
printk(KERN_DEBUG "Cannot create host stats file\n");
|
|
return rc;
|
|
}
|
|
rc = 0;
|
|
return rc;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|