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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /**
  * @file
  *
  * @ingroup rtems_bdpart
  *
  * @brief Block Device Partition Management
  */
 
 /*
  * Copyright (C) 2009, 2012 embedded brains GmbH & Co. KG
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include <rtems.h>
 #include <rtems/bdpart.h>
 
 static char *create_logical_disk_name( const char *disk_name, char **marker)
 {
   size_t disk_name_size = strlen( disk_name);
   char *logical_disk_name = malloc( disk_name_size + RTEMS_BDPART_NUMBER_SIZE);
 
   if (logical_disk_name != NULL) {
     /* The string is NUL terminated by (A) ... */
     memcpy( logical_disk_name, disk_name, disk_name_size);
     *marker = logical_disk_name + disk_name_size;
   }
 
   return logical_disk_name;
 }
 
 static rtems_status_code update_logical_disk_name(
   char *logical_disk_marker,
   size_t i
 )
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   int rv = 0;
 
   /* ... (A) */
   rv = snprintf( logical_disk_marker, RTEMS_BDPART_NUMBER_SIZE, "%zu", i + 1);
   if (rv >= RTEMS_BDPART_NUMBER_SIZE) {
     sc = RTEMS_INVALID_NAME;
   }
 
   return sc;
 }
 
 rtems_status_code rtems_bdpart_register(
   const char *disk_name,
   const rtems_bdpart_partition *pt,
   size_t count
 )
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_status_code esc = RTEMS_SUCCESSFUL;
   rtems_blkdev_bnum disk_end = 0;
   char *logical_disk_name = NULL;
   char *logical_disk_marker = NULL;
   size_t i = 0;
   int fd = -1;
   rtems_disk_device *dd = NULL;
 
   /* Get disk data */
   sc = rtems_bdpart_get_disk_data( disk_name, &fd, &dd, &disk_end);
   if (sc != RTEMS_SUCCESSFUL) {
     return sc;
   }
 
   /* Create logical disk name */
   logical_disk_name = create_logical_disk_name(
     disk_name,
     &logical_disk_marker
   );
   if (logical_disk_name == NULL) {
     esc = sc;
     goto cleanup;
   }
 
   /* Create a logical disk for each partition */
   for (i = 0; i < count; ++i) {
     const rtems_bdpart_partition *p = pt + i;
 
     /* Set partition number for logical disk name */
     sc = update_logical_disk_name( logical_disk_marker, i);
     if (sc != RTEMS_SUCCESSFUL) {
       esc = sc;
       goto cleanup;
     }
 
     /* Create logical disk */
     sc = rtems_blkdev_create_partition(
       logical_disk_name,
       disk_name,
       p->begin,
       p->end - p->begin
     );
     if (sc != RTEMS_SUCCESSFUL) {
       esc = sc;
       goto cleanup;
     }
   }
 
 cleanup:
 
   free( logical_disk_name);
   close( fd);
 
   return esc;
 }
 
 rtems_status_code rtems_bdpart_register_from_disk( const char *disk_name)
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_bdpart_format format;
   rtems_bdpart_partition pt [RTEMS_BDPART_PARTITION_NUMBER_HINT];
   size_t count = RTEMS_BDPART_PARTITION_NUMBER_HINT;
 
   /* Read partitions */
   sc = rtems_bdpart_read( disk_name, &format, pt, &count);
   if (sc != RTEMS_SUCCESSFUL) {
     return sc;
   }
 
   /* Register partitions */
   return rtems_bdpart_register( disk_name, pt, count);
 }
 
 rtems_status_code rtems_bdpart_unregister(
   const char *disk_name,
   const rtems_bdpart_partition *pt RTEMS_UNUSED,
   size_t count
 )
 {
   rtems_status_code sc = RTEMS_SUCCESSFUL;
   rtems_status_code esc = RTEMS_SUCCESSFUL;
   rtems_blkdev_bnum disk_end = 0;
   char *logical_disk_name = NULL;
   char *logical_disk_marker = NULL;
   size_t i = 0;
   int fd = -1;
   rtems_disk_device *dd = NULL;
 
   /* Get disk data */
   sc = rtems_bdpart_get_disk_data( disk_name, &fd, &dd, &disk_end);
   if (sc != RTEMS_SUCCESSFUL) {
     return sc;
   }
 
   /* Create logical disk name */
   logical_disk_name = create_logical_disk_name(
     disk_name,
     &logical_disk_marker
   );
   if (logical_disk_name == NULL) {
     esc = sc;
     goto cleanup;
   }
 
   /* Delete the logical disk for each partition */
   for (i = 0; i < count; ++i) {
     int rv = 0;
 
     /* Set partition number for logical disk name */
     sc = update_logical_disk_name( logical_disk_marker, i);
     if (sc != RTEMS_SUCCESSFUL) {
       esc = sc;
       goto cleanup;
     }
 
     /* Delete logical disk */
     rv = unlink( logical_disk_name);
     if (rv != 0) {
       esc = sc;
       goto cleanup;
     }
   }
 
 cleanup:
 
   /*
    * When we get here, logical_disk_name is guaranteed to be non-NULL
    * but fd may be -1. Coverity flagged passing a bad value to close().
    */
   free( logical_disk_name);
   if (fd >= 0) {
     close( fd);
   }
 
   return esc;
 }

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