--- zzzz-none-000/linux-3.10.107/drivers/scsi/fnic/fnic_debugfs.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/scsi/fnic/fnic_debugfs.c 2021-02-04 17:41:59.000000000 +0000 @@ -18,19 +18,103 @@ #include #include #include +#include #include "fnic.h" static struct dentry *fnic_trace_debugfs_root; static struct dentry *fnic_trace_debugfs_file; static struct dentry *fnic_trace_enable; +static struct dentry *fnic_stats_debugfs_root; + +static struct dentry *fnic_fc_trace_debugfs_file; +static struct dentry *fnic_fc_rdata_trace_debugfs_file; +static struct dentry *fnic_fc_trace_enable; +static struct dentry *fnic_fc_trace_clear; + +struct fc_trace_flag_type { + u8 fc_row_file; + u8 fc_normal_file; + u8 fnic_trace; + u8 fc_trace; + u8 fc_clear; +}; + +static struct fc_trace_flag_type *fc_trc_flag; + +/* + * 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) +{ + int rc = -1; + fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL); + if (!fnic_trace_debugfs_root) { + printk(KERN_DEBUG "Cannot create debugfs root\n"); + return rc; + } + + if (!fnic_trace_debugfs_root) { + printk(KERN_DEBUG + "fnic root directory doesn't exist in debugfs\n"); + return rc; + } + + fnic_stats_debugfs_root = debugfs_create_dir("statistics", + fnic_trace_debugfs_root); + if (!fnic_stats_debugfs_root) { + printk(KERN_DEBUG "Cannot create Statistics directory\n"); + return rc; + } + + /* Allocate memory to structure */ + fc_trc_flag = (struct fc_trace_flag_type *) + vmalloc(sizeof(struct fc_trace_flag_type)); + + if (fc_trc_flag) { + fc_trc_flag->fc_row_file = 0; + fc_trc_flag->fc_normal_file = 1; + fc_trc_flag->fnic_trace = 2; + fc_trc_flag->fc_trace = 3; + fc_trc_flag->fc_clear = 4; + } + + rc = 0; + return rc; +} + +/* + * 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; + + debugfs_remove(fnic_trace_debugfs_root); + fnic_trace_debugfs_root = NULL; + + if (fc_trc_flag) + vfree(fc_trc_flag); +} /* - * fnic_trace_ctrl_open - Open the trace_enable file + * fnic_trace_ctrl_open - Open the trace_enable file for fnic_trace + * Or Open fc_trace_enable file for fc_trace * @inode: The inode pointer. * @file: The file pointer to attach the trace enable/disable flag. * * Description: - * This routine opens a debugsfs file trace_enable. + * This routine opens a debugsfs file trace_enable or fc_trace_enable. * * Returns: * This function returns zero if successful. @@ -42,15 +126,19 @@ } /* - * fnic_trace_ctrl_read - Read a trace_enable debugfs file + * 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 - * and stores into local @buf. It will start reading file at @ppos and + * 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: @@ -62,13 +150,25 @@ { char buf[64]; int len; - len = sprintf(buf, "%u\n", fnic_tracing_enabled); + u8 *trace_type; + len = 0; + trace_type = (u8 *)filp->private_data; + if (*trace_type == fc_trc_flag->fnic_trace) + len = sprintf(buf, "%u\n", fnic_tracing_enabled); + else if (*trace_type == fc_trc_flag->fc_trace) + len = sprintf(buf, "%u\n", fnic_fc_tracing_enabled); + else if (*trace_type == fc_trc_flag->fc_clear) + len = sprintf(buf, "%u\n", fnic_fc_trace_cleared); + else + pr_err("fnic: Cannot read to any debugfs file\n"); return simple_read_from_buffer(ubuf, cnt, ppos, buf, len); } /* - * fnic_trace_ctrl_write - Write to trace_enable debugfs file + * 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. @@ -76,7 +176,8 @@ * * Description: * This routine writes data from user buffer @ubuf to buffer @buf and - * sets fnic_tracing_enabled value as per user input. + * 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. @@ -88,6 +189,8 @@ char buf[64]; unsigned long val; int ret; + u8 *trace_type; + trace_type = (u8 *)filp->private_data; if (cnt >= sizeof(buf)) return -EINVAL; @@ -101,12 +204,27 @@ if (ret < 0) return ret; - fnic_tracing_enabled = val; + if (*trace_type == fc_trc_flag->fnic_trace) + fnic_tracing_enabled = val; + else if (*trace_type == fc_trc_flag->fc_trace) + fnic_fc_tracing_enabled = val; + else if (*trace_type == fc_trc_flag->fc_clear) + fnic_fc_trace_cleared = val; + else + pr_err("fnic: cannot write to any debugfs file\n"); + (*ppos)++; return cnt; } +static const struct file_operations fnic_trace_ctrl_fops = { + .owner = THIS_MODULE, + .open = fnic_trace_ctrl_open, + .read = fnic_trace_ctrl_read, + .write = fnic_trace_ctrl_write, +}; + /* * fnic_trace_debugfs_open - Open the fnic trace log * @inode: The inode pointer @@ -126,19 +244,36 @@ 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_dbg_prt->buffer = vmalloc((3*(trace_max_pages * PAGE_SIZE))); - if (!fnic_dbg_prt->buffer) { - kfree(fnic_dbg_prt); - return -ENOMEM; + if (*rdata_ptr == fc_trc_flag->fnic_trace) { + fnic_dbg_prt->buffer = vmalloc(3 * + (trace_max_pages * PAGE_SIZE)); + if (!fnic_dbg_prt->buffer) { + kfree(fnic_dbg_prt); + return -ENOMEM; + } + memset((void *)fnic_dbg_prt->buffer, 0, + 3 * (trace_max_pages * PAGE_SIZE)); + fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt); + } else { + fnic_dbg_prt->buffer = + vmalloc(3 * (fnic_fc_trace_max_pages * PAGE_SIZE)); + if (!fnic_dbg_prt->buffer) { + kfree(fnic_dbg_prt); + return -ENOMEM; + } + memset((void *)fnic_dbg_prt->buffer, 0, + 3 * (fnic_fc_trace_max_pages * PAGE_SIZE)); + fnic_dbg_prt->buffer_len = + fnic_fc_trace_get_data(fnic_dbg_prt, *rdata_ptr); } - memset((void *)fnic_dbg_prt->buffer, 0, - (3*(trace_max_pages * PAGE_SIZE))); - fnic_dbg_prt->buffer_len = fnic_get_trace_data(fnic_dbg_prt); file->private_data = fnic_dbg_prt; + return 0; } @@ -164,20 +299,8 @@ int howto) { fnic_dbgfs_t *fnic_dbg_prt = file->private_data; - loff_t pos = -1; - - switch (howto) { - case 0: - pos = offset; - break; - case 1: - pos = file->f_pos + offset; - break; - case 2: - pos = fnic_dbg_prt->buffer_len + offset; - } - return (pos < 0 || pos > fnic_dbg_prt->buffer_len) ? - -EINVAL : (file->f_pos = pos); + return fixed_size_llseek(file, offset, howto, + fnic_dbg_prt->buffer_len); } /* @@ -232,13 +355,6 @@ return 0; } -static const struct file_operations fnic_trace_ctrl_fops = { - .owner = THIS_MODULE, - .open = fnic_trace_ctrl_open, - .read = fnic_trace_ctrl_read, - .write = fnic_trace_ctrl_write, -}; - static const struct file_operations fnic_trace_debugfs_fops = { .owner = THIS_MODULE, .open = fnic_trace_debugfs_open, @@ -253,37 +369,39 @@ * 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. It will 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. + * 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. */ int fnic_trace_debugfs_init(void) { int rc = -1; - fnic_trace_debugfs_root = debugfs_create_dir("fnic", NULL); if (!fnic_trace_debugfs_root) { - printk(KERN_DEBUG "Cannot create debugfs root\n"); + printk(KERN_DEBUG + "FNIC Debugfs root directory doesn't exist\n"); return rc; } fnic_trace_enable = debugfs_create_file("tracing_enable", - S_IFREG|S_IRUGO|S_IWUSR, - fnic_trace_debugfs_root, - NULL, &fnic_trace_ctrl_fops); + S_IFREG|S_IRUGO|S_IWUSR, + fnic_trace_debugfs_root, + &(fc_trc_flag->fnic_trace), + &fnic_trace_ctrl_fops); if (!fnic_trace_enable) { - printk(KERN_DEBUG "Cannot create trace_enable file" - " under debugfs"); + printk(KERN_DEBUG + "Cannot create trace_enable file under debugfs\n"); return rc; } fnic_trace_debugfs_file = debugfs_create_file("trace", - S_IFREG|S_IRUGO|S_IWUSR, - fnic_trace_debugfs_root, - NULL, - &fnic_trace_debugfs_fops); + S_IFREG|S_IRUGO|S_IWUSR, + fnic_trace_debugfs_root, + &(fc_trc_flag->fnic_trace), + &fnic_trace_debugfs_fops); if (!fnic_trace_debugfs_file) { - printk(KERN_DEBUG "Cannot create trace file under debugfs"); + printk(KERN_DEBUG + "Cannot create trace file under debugfs\n"); return rc; } rc = 0; @@ -299,16 +417,421 @@ */ void fnic_trace_debugfs_terminate(void) { - if (fnic_trace_debugfs_file) { - debugfs_remove(fnic_trace_debugfs_file); - fnic_trace_debugfs_file = NULL; - } - if (fnic_trace_enable) { - debugfs_remove(fnic_trace_enable); - fnic_trace_enable = NULL; - } - if (fnic_trace_debugfs_root) { - debugfs_remove(fnic_trace_debugfs_root); - fnic_trace_debugfs_root = NULL; + debugfs_remove(fnic_trace_debugfs_file); + fnic_trace_debugfs_file = NULL; + + debugfs_remove(fnic_trace_enable); + fnic_trace_enable = 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. + */ + +int fnic_fc_trace_debugfs_init(void) +{ + int rc = -1; + + if (!fnic_trace_debugfs_root) { + pr_err("fnic:Debugfs root directory doesn't exist\n"); + return rc; + } + + fnic_fc_trace_enable = debugfs_create_file("fc_trace_enable", + S_IFREG|S_IRUGO|S_IWUSR, + fnic_trace_debugfs_root, + &(fc_trc_flag->fc_trace), + &fnic_trace_ctrl_fops); + + if (!fnic_fc_trace_enable) { + pr_err("fnic: Failed create fc_trace_enable file\n"); + return rc; + } + + fnic_fc_trace_clear = debugfs_create_file("fc_trace_clear", + S_IFREG|S_IRUGO|S_IWUSR, + fnic_trace_debugfs_root, + &(fc_trc_flag->fc_clear), + &fnic_trace_ctrl_fops); + + if (!fnic_fc_trace_clear) { + pr_err("fnic: Failed to create fc_trace_enable file\n"); + return rc; + } + + fnic_fc_rdata_trace_debugfs_file = + debugfs_create_file("fc_trace_rdata", + S_IFREG|S_IRUGO|S_IWUSR, + fnic_trace_debugfs_root, + &(fc_trc_flag->fc_normal_file), + &fnic_trace_debugfs_fops); + + if (!fnic_fc_rdata_trace_debugfs_file) { + pr_err("fnic: Failed create fc_rdata_trace file\n"); + return rc; + } + + fnic_fc_trace_debugfs_file = + debugfs_create_file("fc_trace", + S_IFREG|S_IRUGO|S_IWUSR, + fnic_trace_debugfs_root, + &(fc_trc_flag->fc_row_file), + &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; }