libblock/src/blkdev-blkstats.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup rtems_blkdev Block Device Management
0007  *
0008  * @brief Block Device Statistics Command
0009  */
0010
0011 /*
0012  * Copyright (c) 2012 embedded brains GmbH & Co. KG
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035
0036 #ifdef HAVE_CONFIG_H
0037 #include "config.h"
0038 #endif
0039
0040 #include <rtems/blkdev.h>
0041
0042 #include <sys/stat.h>
0043 #include <fcntl.h>
0044 #include <unistd.h>
0045 #include <errno.h>
0046 #include <string.h>
0047
0048 void rtems_blkstats(const rtems_printer* printer, const char *device, bool reset)
0049 {
0050   int fd = open(device, O_RDONLY);
0051
0052   if (fd >= 0) {
0053     struct stat st;
0054     int rv;
0055
0056     rv = fstat(fd, &st);
0057     if (rv == 0) {
0058       if (S_ISBLK(st.st_mode)) {
0059         if (reset) {
0060           rv = rtems_disk_fd_reset_device_stats(fd);
0061           if (rv != 0) {
0062             rtems_printf(printer, "error: reset stats: %s\n", strerror(errno));
0063           }
0064         } else {
0065           uint32_t media_block_size = 0;
0066           uint32_t media_block_count = 0;
0067           uint32_t block_size = 0;
0068           rtems_blkdev_stats stats;
0069
0070           rtems_disk_fd_get_media_block_size(fd, &media_block_size);
0071           rtems_disk_fd_get_block_count(fd, &media_block_count);
0072           rtems_disk_fd_get_block_size(fd, &block_size);
0073
0074           rv = rtems_disk_fd_get_device_stats(fd, &stats);
0075           if (rv == 0) {
0076             rtems_blkdev_print_stats(
0077               &stats,
0078               media_block_size,
0079               media_block_count,
0080               block_size,
0081               printer
0082             );
0083           } else {
0084             rtems_printf(printer, "error: get stats: %s\n", strerror(errno));
0085           }
0086         }
0087       } else {
0088         rtems_printf(printer, "error: not a block device\n");
0089       }
0090     } else {
0091       rtems_printf(printer, "error: get file stats: %s\n", strerror(errno));
0092     }
0093
0094     rv = close(fd);
0095     if (rv != 0) {
0096       rtems_printf(printer, "error: close device: %s\n", strerror(errno));
0097     }
0098   } else {
0099     rtems_printf(printer, "error: open device: %s\n", strerror(errno));
0100   }
0101 }