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af72bc8cd6
Since snprintf() returns the would-be-output size instead of the actual output size, the succeeding calls may go beyond the given buffer limit. Fix it by replacing with scnprintf(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
538 lines
17 KiB
C
538 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// Copyright(c) 2013 Mauro Carvalho Chehab
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#include "smscoreapi.h"
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/debugfs.h>
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#include <linux/spinlock.h>
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#include <linux/usb.h>
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#include <media/dmxdev.h>
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#include <media/dvbdev.h>
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#include <media/dvb_demux.h>
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#include <media/dvb_frontend.h>
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#include "smsdvb.h"
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static struct dentry *smsdvb_debugfs_usb_root;
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struct smsdvb_debugfs {
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struct kref refcount;
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spinlock_t lock;
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char stats_data[PAGE_SIZE];
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unsigned stats_count;
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bool stats_was_read;
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wait_queue_head_t stats_queue;
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};
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static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
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struct sms_stats *p)
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{
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int n = 0;
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char *buf;
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spin_lock(&debug_data->lock);
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if (debug_data->stats_count) {
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spin_unlock(&debug_data->lock);
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return;
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}
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buf = debug_data->stats_data;
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_rf_locked = %d\n", p->is_rf_locked);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_demod_locked = %d\n", p->is_demod_locked);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_external_lna_on = %d\n", p->is_external_lna_on);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"SNR = %d\n", p->SNR);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ber = %d\n", p->ber);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"FIB_CRC = %d\n", p->FIB_CRC);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ts_per = %d\n", p->ts_per);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"MFER = %d\n", p->MFER);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"RSSI = %d\n", p->RSSI);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"in_band_pwr = %d\n", p->in_band_pwr);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"carrier_offset = %d\n", p->carrier_offset);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\n", p->modem_state);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"frequency = %d\n", p->frequency);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"bandwidth = %d\n", p->bandwidth);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"transmission_mode = %d\n", p->transmission_mode);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\n", p->modem_state);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"guard_interval = %d\n", p->guard_interval);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"code_rate = %d\n", p->code_rate);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"lp_code_rate = %d\n", p->lp_code_rate);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"hierarchy = %d\n", p->hierarchy);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"constellation = %d\n", p->constellation);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"burst_size = %d\n", p->burst_size);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"burst_duration = %d\n", p->burst_duration);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"burst_cycle_time = %d\n", p->burst_cycle_time);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"calc_burst_cycle_time = %d\n",
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p->calc_burst_cycle_time);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_rows = %d\n", p->num_of_rows);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_padd_cols = %d\n", p->num_of_padd_cols);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_punct_cols = %d\n", p->num_of_punct_cols);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"error_ts_packets = %d\n", p->error_ts_packets);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"total_ts_packets = %d\n", p->total_ts_packets);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ber_error_count = %d\n", p->ber_error_count);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ber_bit_count = %d\n", p->ber_bit_count);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"pre_ber = %d\n", p->pre_ber);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"cell_id = %d\n", p->cell_id);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_mpe_received = %d\n", p->num_mpe_received);
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debug_data->stats_count = n;
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spin_unlock(&debug_data->lock);
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wake_up(&debug_data->stats_queue);
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}
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static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
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struct sms_isdbt_stats *p)
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{
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int i, n = 0;
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char *buf;
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spin_lock(&debug_data->lock);
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if (debug_data->stats_count) {
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spin_unlock(&debug_data->lock);
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return;
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}
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buf = debug_data->stats_data;
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"statistics_type = %d\t", p->statistics_type);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"full_size = %d\n", p->full_size);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_rf_locked = %d\t\t", p->is_rf_locked);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_demod_locked = %d\t", p->is_demod_locked);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_external_lna_on = %d\n", p->is_external_lna_on);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"SNR = %d dB\t\t", p->SNR);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"RSSI = %d dBm\t\t", p->RSSI);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"in_band_pwr = %d dBm\n", p->in_band_pwr);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"carrier_offset = %d\t", p->carrier_offset);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"bandwidth = %d\t\t", p->bandwidth);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"frequency = %d Hz\n", p->frequency);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"transmission_mode = %d\t", p->transmission_mode);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\t\t", p->modem_state);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"guard_interval = %d\n", p->guard_interval);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"system_type = %d\t\t", p->system_type);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"partial_reception = %d\t", p->partial_reception);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_layers = %d\n", p->num_of_layers);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
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for (i = 0; i < 3; i++) {
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if (p->layer_info[i].number_of_segments < 1 ||
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p->layer_info[i].number_of_segments > 13)
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continue;
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
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p->layer_info[i].code_rate);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
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p->layer_info[i].constellation);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
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p->layer_info[i].ber);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\tber_error_count = %-5d\t",
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p->layer_info[i].ber_error_count);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
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p->layer_info[i].ber_bit_count);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
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p->layer_info[i].pre_ber);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
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p->layer_info[i].ts_per);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\terror_ts_packets = %-5d\t",
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p->layer_info[i].error_ts_packets);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"total_ts_packets = %-5d\t",
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p->layer_info[i].total_ts_packets);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
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p->layer_info[i].ti_ldepth_i);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\tnumber_of_segments = %d\t",
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p->layer_info[i].number_of_segments);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
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p->layer_info[i].tmcc_errors);
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}
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debug_data->stats_count = n;
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spin_unlock(&debug_data->lock);
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wake_up(&debug_data->stats_queue);
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}
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static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
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struct sms_isdbt_stats_ex *p)
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{
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int i, n = 0;
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char *buf;
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spin_lock(&debug_data->lock);
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if (debug_data->stats_count) {
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spin_unlock(&debug_data->lock);
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return;
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}
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buf = debug_data->stats_data;
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"statistics_type = %d\t", p->statistics_type);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"full_size = %d\n", p->full_size);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_rf_locked = %d\t\t", p->is_rf_locked);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_demod_locked = %d\t", p->is_demod_locked);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_external_lna_on = %d\n", p->is_external_lna_on);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"SNR = %d dB\t\t", p->SNR);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"RSSI = %d dBm\t\t", p->RSSI);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"in_band_pwr = %d dBm\n", p->in_band_pwr);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"carrier_offset = %d\t", p->carrier_offset);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"bandwidth = %d\t\t", p->bandwidth);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"frequency = %d Hz\n", p->frequency);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"transmission_mode = %d\t", p->transmission_mode);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\t\t", p->modem_state);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"guard_interval = %d\n", p->guard_interval);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"system_type = %d\t\t", p->system_type);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"partial_reception = %d\t", p->partial_reception);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_layers = %d\n", p->num_of_layers);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
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p->segment_number);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
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p->tune_bw);
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for (i = 0; i < 3; i++) {
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if (p->layer_info[i].number_of_segments < 1 ||
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p->layer_info[i].number_of_segments > 13)
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continue;
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
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p->layer_info[i].code_rate);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
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p->layer_info[i].constellation);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
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p->layer_info[i].ber);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\tber_error_count = %-5d\t",
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p->layer_info[i].ber_error_count);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
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p->layer_info[i].ber_bit_count);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
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p->layer_info[i].pre_ber);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
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p->layer_info[i].ts_per);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\terror_ts_packets = %-5d\t",
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p->layer_info[i].error_ts_packets);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"total_ts_packets = %-5d\t",
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p->layer_info[i].total_ts_packets);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
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p->layer_info[i].ti_ldepth_i);
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\tnumber_of_segments = %d\t",
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p->layer_info[i].number_of_segments);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
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p->layer_info[i].tmcc_errors);
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}
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debug_data->stats_count = n;
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spin_unlock(&debug_data->lock);
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wake_up(&debug_data->stats_queue);
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}
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static int smsdvb_stats_open(struct inode *inode, struct file *file)
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{
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struct smsdvb_client_t *client = inode->i_private;
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struct smsdvb_debugfs *debug_data = client->debug_data;
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kref_get(&debug_data->refcount);
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spin_lock(&debug_data->lock);
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debug_data->stats_count = 0;
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debug_data->stats_was_read = false;
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spin_unlock(&debug_data->lock);
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file->private_data = debug_data;
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return 0;
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}
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static void smsdvb_debugfs_data_release(struct kref *ref)
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{
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struct smsdvb_debugfs *debug_data;
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debug_data = container_of(ref, struct smsdvb_debugfs, refcount);
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kfree(debug_data);
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}
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static int smsdvb_stats_wait_read(struct smsdvb_debugfs *debug_data)
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{
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int rc = 1;
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spin_lock(&debug_data->lock);
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if (debug_data->stats_was_read)
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goto exit;
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rc = debug_data->stats_count;
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exit:
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spin_unlock(&debug_data->lock);
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return rc;
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}
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static __poll_t smsdvb_stats_poll(struct file *file, poll_table *wait)
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{
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struct smsdvb_debugfs *debug_data = file->private_data;
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int rc;
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kref_get(&debug_data->refcount);
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poll_wait(file, &debug_data->stats_queue, wait);
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rc = smsdvb_stats_wait_read(debug_data);
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kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
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return rc > 0 ? EPOLLIN | EPOLLRDNORM : 0;
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}
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static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
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size_t nbytes, loff_t *ppos)
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{
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int rc = 0, len;
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struct smsdvb_debugfs *debug_data = file->private_data;
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|
kref_get(&debug_data->refcount);
|
|
|
|
if (file->f_flags & O_NONBLOCK) {
|
|
rc = smsdvb_stats_wait_read(debug_data);
|
|
if (!rc) {
|
|
rc = -EWOULDBLOCK;
|
|
goto ret;
|
|
}
|
|
} else {
|
|
rc = wait_event_interruptible(debug_data->stats_queue,
|
|
smsdvb_stats_wait_read(debug_data));
|
|
if (rc < 0)
|
|
goto ret;
|
|
}
|
|
|
|
if (debug_data->stats_was_read) {
|
|
rc = 0; /* EOF */
|
|
goto ret;
|
|
}
|
|
|
|
len = debug_data->stats_count - *ppos;
|
|
if (len >= 0)
|
|
rc = simple_read_from_buffer(user_buf, nbytes, ppos,
|
|
debug_data->stats_data, len);
|
|
else
|
|
rc = 0;
|
|
|
|
if (*ppos >= debug_data->stats_count) {
|
|
spin_lock(&debug_data->lock);
|
|
debug_data->stats_was_read = true;
|
|
spin_unlock(&debug_data->lock);
|
|
}
|
|
ret:
|
|
kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
|
|
return rc;
|
|
}
|
|
|
|
static int smsdvb_stats_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct smsdvb_debugfs *debug_data = file->private_data;
|
|
|
|
spin_lock(&debug_data->lock);
|
|
debug_data->stats_was_read = true; /* return EOF to read() */
|
|
spin_unlock(&debug_data->lock);
|
|
wake_up_interruptible_sync(&debug_data->stats_queue);
|
|
|
|
kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
|
|
file->private_data = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations debugfs_stats_ops = {
|
|
.open = smsdvb_stats_open,
|
|
.poll = smsdvb_stats_poll,
|
|
.read = smsdvb_stats_read,
|
|
.release = smsdvb_stats_release,
|
|
.llseek = generic_file_llseek,
|
|
};
|
|
|
|
/*
|
|
* Functions used by smsdvb, in order to create the interfaces
|
|
*/
|
|
|
|
int smsdvb_debugfs_create(struct smsdvb_client_t *client)
|
|
{
|
|
struct smscore_device_t *coredev = client->coredev;
|
|
struct dentry *d;
|
|
struct smsdvb_debugfs *debug_data;
|
|
|
|
if (!smsdvb_debugfs_usb_root || !coredev->is_usb_device)
|
|
return -ENODEV;
|
|
|
|
client->debugfs = debugfs_create_dir(coredev->devpath,
|
|
smsdvb_debugfs_usb_root);
|
|
if (IS_ERR_OR_NULL(client->debugfs)) {
|
|
pr_info("Unable to create debugfs %s directory.\n",
|
|
coredev->devpath);
|
|
return -ENODEV;
|
|
}
|
|
|
|
d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
|
|
client, &debugfs_stats_ops);
|
|
if (!d) {
|
|
debugfs_remove(client->debugfs);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
debug_data = kzalloc(sizeof(*client->debug_data), GFP_KERNEL);
|
|
if (!debug_data)
|
|
return -ENOMEM;
|
|
|
|
client->debug_data = debug_data;
|
|
client->prt_dvb_stats = smsdvb_print_dvb_stats;
|
|
client->prt_isdb_stats = smsdvb_print_isdb_stats;
|
|
client->prt_isdb_stats_ex = smsdvb_print_isdb_stats_ex;
|
|
|
|
init_waitqueue_head(&debug_data->stats_queue);
|
|
spin_lock_init(&debug_data->lock);
|
|
kref_init(&debug_data->refcount);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void smsdvb_debugfs_release(struct smsdvb_client_t *client)
|
|
{
|
|
if (!client->debugfs)
|
|
return;
|
|
|
|
client->prt_dvb_stats = NULL;
|
|
client->prt_isdb_stats = NULL;
|
|
client->prt_isdb_stats_ex = NULL;
|
|
|
|
debugfs_remove_recursive(client->debugfs);
|
|
kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
|
|
|
|
client->debug_data = NULL;
|
|
client->debugfs = NULL;
|
|
}
|
|
|
|
void smsdvb_debugfs_register(void)
|
|
{
|
|
struct dentry *d;
|
|
|
|
/*
|
|
* FIXME: This was written to debug Siano USB devices. So, it creates
|
|
* the debugfs node under <debugfs>/usb.
|
|
* A similar logic would be needed for Siano sdio devices, but, in that
|
|
* case, usb_debug_root is not a good choice.
|
|
*
|
|
* Perhaps the right fix here would be to create another sysfs root
|
|
* node for sdio-based boards, but this may need some logic at sdio
|
|
* subsystem.
|
|
*/
|
|
d = debugfs_create_dir("smsdvb", usb_debug_root);
|
|
if (IS_ERR_OR_NULL(d)) {
|
|
pr_err("Couldn't create sysfs node for smsdvb\n");
|
|
return;
|
|
}
|
|
smsdvb_debugfs_usb_root = d;
|
|
}
|
|
|
|
void smsdvb_debugfs_unregister(void)
|
|
{
|
|
if (!smsdvb_debugfs_usb_root)
|
|
return;
|
|
debugfs_remove_recursive(smsdvb_debugfs_usb_root);
|
|
smsdvb_debugfs_usb_root = NULL;
|
|
}
|