int
rtems_rfs_buffer_open (const char* name, rtems_rfs_file_system* fs)
{
struct stat st;
#if RTEMS_RFS_USE_LIBBLOCK
int rv;
#endif
if (rtems_rfs_trace (RTEMS_RFS_TRACE_BUFFER_SYNC))
printf ("rtems-rfs: buffer-open: opening: %s\n", name);
fs->device = open (name, O_RDWR);
if (fs->device < 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_BUFFER_OPEN))
printf ("rtems-rfs: buffer-open: cannot open file\n");
return ENXIO;
}
if (fstat (fs->device, &st) < 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_BUFFER_OPEN))
printf ("rtems-rfs: buffer-open: stat '%s' failed: %s\n",
name, strerror (errno));
return ENXIO;
}
#if RTEMS_RFS_USE_LIBBLOCK
/*
* Is the device a block device ?
*/
if (!S_ISBLK (st.st_mode))
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_BUFFER_OPEN))
printf ("rtems-rfs: buffer-open: '%s' is not a block device\n", name);
return ENXIO;
}
/*
* Check that device is registred as a block device and lock it.
*/
rv = rtems_disk_fd_get_disk_device (fs->device, &fs->disk);
if (rv != 0)
{
if (rtems_rfs_trace (RTEMS_RFS_TRACE_BUFFER_OPEN))
printf ("rtems-rfs: buffer-open: cannot obtain the disk\n");
return ENXIO;
}
#else
fs->media_size = st.st_size;
strcat (fs->name, name);
#endif
if (rtems_rfs_trace (RTEMS_RFS_TRACE_BUFFER_SYNC))
printf ("rtems-rfs: buffer-open: blks=%" PRId32 ", blk-size=%" PRId32 "\n",
rtems_rfs_fs_media_blocks (fs),
rtems_rfs_fs_media_block_size (fs));
return 0;
}
uint64_t
rtems_rfs_fs_media_size (rtems_rfs_file_system* fs)
{
uint64_t media_blocks = (uint64_t) rtems_rfs_fs_media_blocks (fs);
uint64_t media_block_size = (uint64_t) rtems_rfs_fs_media_block_size (fs);
return media_blocks * media_block_size;
}
/**
* Return the file system stat data.
*
* @param pathloc
* @param sb
* @return int
*/
static int
rtems_rfs_rtems_statvfs (const rtems_filesystem_location_info_t* pathloc,
struct statvfs* sb)
{
rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc);
size_t blocks;
size_t inodes;
rtems_rfs_group_usage (fs, &blocks, &inodes);
sb->f_bsize = rtems_rfs_fs_block_size (fs);
sb->f_frsize = rtems_rfs_fs_media_block_size (fs);
sb->f_blocks = rtems_rfs_fs_media_blocks (fs);
sb->f_bfree = rtems_rfs_fs_blocks (fs) - blocks;
sb->f_bavail = sb->f_bfree;
sb->f_files = rtems_rfs_fs_inodes (fs);
sb->f_ffree = rtems_rfs_fs_inodes (fs) - inodes;
sb->f_favail = sb->f_ffree;
sb->f_fsid = RTEMS_RFS_SB_MAGIC;
sb->f_flag = rtems_rfs_fs_flags (fs);
sb->f_namemax = rtems_rfs_fs_max_name (fs);
return 0;
}
* @return int
*/
static int
rtems_rfs_rtems_statvfs (
const rtems_filesystem_location_info_t *__restrict pathloc,
struct statvfs *__restrict sb)
{
rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc);
size_t blocks;
size_t inodes;
rtems_rfs_group_usage (fs, &blocks, &inodes);
sb->f_bsize = rtems_rfs_fs_block_size (fs);
sb->f_frsize = rtems_rfs_fs_media_block_size (fs);
sb->f_blocks = rtems_rfs_fs_media_blocks (fs);
sb->f_bfree = rtems_rfs_fs_blocks (fs) - blocks - 1; /* do not count the superblock */
sb->f_bavail = sb->f_bfree;
sb->f_files = rtems_rfs_fs_inodes (fs);
sb->f_ffree = rtems_rfs_fs_inodes (fs) - inodes;
sb->f_favail = sb->f_ffree;
sb->f_fsid = RTEMS_RFS_SB_MAGIC;
sb->f_flag = rtems_rfs_fs_flags (fs);
sb->f_namemax = rtems_rfs_fs_max_name (fs);
return 0;
}
/**
* Handler table for RFS link nodes
*/
int
rtems_rfs_format (const char* name, const rtems_rfs_format_config* config)
{
rtems_rfs_file_system fs;
int group;
int rc;
if (config->verbose)
printf ("rtems-rfs: format: %s\n", name);
memset (&fs, 0, sizeof (rtems_rfs_file_system));
rtems_chain_initialize_empty (&fs.buffers);
rtems_chain_initialize_empty (&fs.release);
rtems_chain_initialize_empty (&fs.release_modified);
rtems_chain_initialize_empty (&fs.file_shares);
fs.max_held_buffers = RTEMS_RFS_FS_MAX_HELD_BUFFERS;
fs.release_count = 0;
fs.release_modified_count = 0;
fs.flags = RTEMS_RFS_FS_NO_LOCAL_CACHE;
/*
* Open the buffer interface.
*/
rc = rtems_rfs_buffer_open (name, &fs);
if (rc > 0)
{
printf ("rtems-rfs: format: buffer open failed: %d: %s\n",
rc, strerror (rc));
return -1;
}
/*
* Check the media.
*/
if (rtems_rfs_fs_media_block_size (&fs) == 0)
{
printf ("rtems-rfs: media block is invalid: %" PRIu32 "\n",
rtems_rfs_fs_media_block_size (&fs));
return -1;
}
/*
* Check the configuration data.
*/
if (!rtems_rfs_check_config (&fs, config))
return -1;
if (config->verbose)
{
printf ("rtems-rfs: format: media size = %" PRIu64 "\n",
rtems_rfs_fs_media_size (&fs));
printf ("rtems-rfs: format: media blocks = %" PRIu32 "\n",
rtems_rfs_fs_media_blocks (&fs));
printf ("rtems-rfs: format: media block size = %" PRIu32 "\n",
rtems_rfs_fs_media_block_size (&fs));
printf ("rtems-rfs: format: size = %" PRIu64 "\n",
rtems_rfs_fs_size (&fs));
printf ("rtems-rfs: format: blocks = %zu\n",
rtems_rfs_fs_blocks (&fs));
printf ("rtems-rfs: format: block size = %zu\n",
rtems_rfs_fs_block_size (&fs));
printf ("rtems-rfs: format: bits per block = %u\n",
rtems_rfs_bits_per_block (&fs));
printf ("rtems-rfs: format: inode size = %zu\n", RTEMS_RFS_INODE_SIZE);
printf ("rtems-rfs: format: inodes = %zu (%d.%d%%)\n",
fs.group_inodes * fs.group_count,
rtems_rfs_inode_overhead (&fs) / 10,
rtems_rfs_inode_overhead (&fs) % 10);
printf ("rtems-rfs: format: groups = %u\n", fs.group_count);
printf ("rtems-rfs: format: group blocks = %zu\n", fs.group_blocks);
printf ("rtems-rfs: format: group inodes = %zu\n", fs.group_inodes);
}
rc = rtems_rfs_buffer_setblksize (&fs, rtems_rfs_fs_block_size (&fs));
if (rc > 0)
{
printf ("rtems-rfs: format: setting block size failed: %d: %s\n",
rc, strerror (rc));
return -1;
}
if (!rtems_rfs_write_superblock (&fs))
{
printf ("rtems-rfs: format: superblock write failed\n");
return -1;
}
for (group = 0; group < fs.group_count; group++)
if (!rtems_rfs_write_group (&fs, group,
config->initialise_inodes, config->verbose))
return -1;
if (config->verbose)
printf ("\n");
rc = rtems_rfs_buffer_close (&fs);
if (rc > 0)
{
printf ("rtems-rfs: format: buffer close failed: %d: %s\n",
rc, strerror (rc));
return -1;
}
rc = rtems_rfs_write_root_dir (name);
if (rc > 0)
{
printf ("rtems-rfs: format: writing root dir failed: %d: %s\n",
rc, strerror (rc));
return -1;
}
return 0;
}
