/* * fnic_debugfs_init - Initialize debugfs for fnic debug logging * * Description: * When Debugfs is configured this routine sets up the fnic debugfs * file system. If not already created, this routine will create the * fnic directory and statistics directory for trace buffer and * stats logging.
*/ int fnic_debugfs_init(void)
{
fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL);
/* * fnic_debugfs_terminate - Tear down debugfs infrastructure * * Description: * When Debugfs is configured this routine removes debugfs file system * elements that are specific to fnic.
*/ void fnic_debugfs_terminate(void)
{
debugfs_remove(fnic_stats_debugfs_root);
fnic_stats_debugfs_root = NULL;
/* * fnic_trace_ctrl_read - * Read trace_enable ,fc_trace_enable * or fc_trace_clear 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 fnic_tracing_enabled or * fnic_fc_tracing_enabled or fnic_fc_trace_cleared * 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_trace_ctrl_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{ char buf[64]; int len;
u8 *trace_type;
len = 0;
trace_type = (u8 *)filp->private_data; if (*trace_type == fc_trc_flag->fnic_trace)
len = sprintf(buf, "%d\n", fnic_tracing_enabled); elseif (*trace_type == fc_trc_flag->fc_trace)
len = sprintf(buf, "%d\n", fnic_fc_tracing_enabled); elseif (*trace_type == fc_trc_flag->fc_clear)
len = sprintf(buf, "%d\n", fnic_fc_trace_cleared); else
pr_err("fnic: Cannot read to any debugfs file\n");
/* * fnic_trace_ctrl_write - * Write to trace_enable, fc_trace_enable or * fc_trace_clear 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 * sets fc_trace_enable ,tracing_enable or fnic_fc_trace_cleared * value as per user input. * * Returns: * This function returns the amount of data that was written.
*/ static ssize_t fnic_trace_ctrl_write(struct file *filp, constchar __user *ubuf,
size_t cnt, loff_t *ppos)
{ char buf[64]; unsignedlong val; int ret;
u8 *trace_type;
trace_type = (u8 *)filp->private_data;
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;
if (*trace_type == fc_trc_flag->fnic_trace)
fnic_tracing_enabled = val; elseif (*trace_type == fc_trc_flag->fc_trace)
fnic_fc_tracing_enabled = val; elseif (*trace_type == fc_trc_flag->fc_clear)
fnic_fc_trace_cleared = val; else
pr_err("fnic: cannot write to any debugfs file\n");
/* * fnic_trace_debugfs_open - Open the fnic trace log * @inode: The inode pointer * @file: The file pointer to attach the log output * * Description: * This routine is the entry point for the debugfs open file operation. * It allocates the necessary buffer for the log, fills the buffer from * the in-memory log and then returns a pointer to that log in * the private_data field in @file. * * Returns: * This function returns zero if successful. On error it will return * a negative error value.
*/ staticint fnic_trace_debugfs_open(struct inode *inode, struct file *file)
{
fnic_dbgfs_t *fnic_dbg_prt;
u8 *rdata_ptr;
rdata_ptr = (u8 *)inode->i_private;
fnic_dbg_prt = kzalloc(sizeof(fnic_dbgfs_t), GFP_KERNEL); if (!fnic_dbg_prt) return -ENOMEM;
/* * fnic_trace_debugfs_lseek - Seek through a debugfs file * @file: The file pointer to seek through. * @offset: The offset to seek to or the amount to seek by. * @howto: Indicates how to seek. * * Description: * This routine is the entry point for the debugfs lseek file operation. * The @howto parameter indicates whether @offset is the offset to directly * seek to, or if it is a value to seek forward or reverse by. This function * figures out what the new offset of the debugfs file will be and assigns * that value to the f_pos field of @file. * * Returns: * This function returns the new offset if successful and returns a negative * error if unable to process the seek.
*/ static loff_t fnic_trace_debugfs_lseek(struct file *file,
loff_t offset, int howto)
{
fnic_dbgfs_t *fnic_dbg_prt = file->private_data; return fixed_size_llseek(file, offset, howto,
fnic_dbg_prt->buffer_len);
}
/* * fnic_trace_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_trace_debugfs_read(struct file *file, char __user *ubuf,
size_t nbytes,
loff_t *pos)
{
fnic_dbgfs_t *fnic_dbg_prt = file->private_data; int rc = 0;
rc = simple_read_from_buffer(ubuf, nbytes, pos,
fnic_dbg_prt->buffer,
fnic_dbg_prt->buffer_len); return rc;
}
/* * fnic_trace_debugfs_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.
*/ staticint fnic_trace_debugfs_release(struct inode *inode, struct file *file)
{
fnic_dbgfs_t *fnic_dbg_prt = file->private_data;
/* * fnic_trace_debugfs_init - Initialize debugfs for fnic trace logging * * Description: * When Debugfs is configured this routine sets up the fnic debugfs * file system. If not already created, this routine will create the * create file trace to log fnic trace buffer output into debugfs and * it will also create file trace_enable to control enable/disable of * trace logging into trace buffer.
*/ void fnic_trace_debugfs_init(void)
{
fnic_trace_enable = debugfs_create_file("tracing_enable",
S_IFREG|S_IRUGO|S_IWUSR,
fnic_trace_debugfs_root,
&(fc_trc_flag->fnic_trace),
&fnic_trace_ctrl_fops);
/* * fnic_trace_debugfs_terminate - Tear down debugfs infrastructure * * Description: * When Debugfs is configured this routine removes debugfs file system * elements that are specific to fnic trace logging.
*/ void fnic_trace_debugfs_terminate(void)
{
debugfs_remove(fnic_trace_debugfs_file);
fnic_trace_debugfs_file = NULL;
/* * fnic_fc_trace_debugfs_init - * Initialize debugfs for fnic control frame trace logging * * Description: * When Debugfs is configured this routine sets up the fnic_fc debugfs * file system. If not already created, this routine will create the * create file trace to log fnic fc trace buffer output into debugfs and * it will also create file fc_trace_enable to control enable/disable of * trace logging into trace buffer.
*/
/* * 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.
*/
/* * 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.
*/ staticint 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;
/* * 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, constchar __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]; unsignedlong 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));
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.
*/ staticint 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.
*/ staticint 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;
}
/* * 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.
*/ staticint 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;
}
/* * 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)
{ char name[16];
/* * 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;
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