int rtems_rfs_file_io_end (rtems_rfs_file_handle* handle, size_t size, bool read) { bool atime; bool mtime; bool length; int rc = 0; if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) printf ("rtems-rfs: file-io: end: %s size=%zu\n", read ? "read" : "write", size); if (rtems_rfs_buffer_handle_has_block (&handle->buffer)) { if (!read) rtems_rfs_buffer_mark_dirty (rtems_rfs_file_buffer (handle)); rc = rtems_rfs_buffer_handle_release (rtems_rfs_file_fs (handle), rtems_rfs_file_buffer (handle)); if (rc > 0) { printf ( "rtems-rfs: file-io: end: error on release: %s size=%zu: %d: %s\n", read ? "read" : "write", size, rc, strerror (rc)); return rc; } } /* * Update the handle's position. Only a block size can be handled at a time * so no special maths is needed. If the offset is bigger than the block size * increase the block number and adjust the offset. * * If we are the last block and the position is past the current size update * the size with the new length. The map holds the block count. */ handle->bpos.boff += size; if (handle->bpos.boff >= rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle))) { handle->bpos.bno++; handle->bpos.boff -= rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); } length = false; mtime = false; if (!read && rtems_rfs_block_map_past_end (rtems_rfs_file_map (handle), rtems_rfs_file_bpos (handle))) { rtems_rfs_block_map_set_size_offset (rtems_rfs_file_map (handle), handle->bpos.boff); length = true; mtime = true; } atime = rtems_rfs_file_update_atime (handle); mtime = rtems_rfs_file_update_mtime (handle) && mtime; length = rtems_rfs_file_update_length (handle) && length; if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) printf ("rtems-rfs: file-io: end: pos=%" PRIu32 ":%" PRIu32 " %c %c %c\n", handle->bpos.bno, handle->bpos.boff, atime ? 'A' : '-', mtime ? 'M' : '-', length ? 'L' : '-'); if (atime || mtime) { time_t now = time (NULL); if (read && atime) handle->shared->atime = now; if (!read && mtime) handle->shared->mtime = now; } if (length) { handle->shared->size.count = rtems_rfs_block_map_count (rtems_rfs_file_map (handle)); handle->shared->size.offset = rtems_rfs_block_map_size_offset (rtems_rfs_file_map (handle)); } return rc; }
rtems_rfs_pos rtems_rfs_block_get_pos (rtems_rfs_file_system* fs, rtems_rfs_block_pos* bpos) { return (bpos->bno * rtems_rfs_fs_block_size (fs)) + bpos->boff; }
int rtems_rfs_file_io_start (rtems_rfs_file_handle* handle, size_t* available, bool read) { size_t size; if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) printf ("rtems-rfs: file-io: start: %s pos=%" PRIu32 ":%" PRIu32 "\n", read ? "read" : "write", handle->bpos.bno, handle->bpos.boff); if (!rtems_rfs_buffer_handle_has_block (&handle->buffer)) { rtems_rfs_buffer_block block; bool request_read; int rc; request_read = read; rc = rtems_rfs_block_map_find (rtems_rfs_file_fs (handle), rtems_rfs_file_map (handle), rtems_rfs_file_bpos (handle), &block); if (rc > 0) { /* * Has the read reached the EOF ? */ if (read && (rc == ENXIO)) { *available = 0; return 0; } if (rc != ENXIO) return rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) printf ("rtems-rfs: file-io: start: grow\n"); rc = rtems_rfs_block_map_grow (rtems_rfs_file_fs (handle), rtems_rfs_file_map (handle), 1, &block); if (rc > 0) return rc; request_read = false; } else { /* * If this is a write check if the write starts within a block or the * amount of data is less than a block size. If it is read the block * rather than getting a block to fill. */ if (!read && (rtems_rfs_file_block_offset (handle) || (*available < rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle))))) request_read = true; } if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) printf ("rtems-rfs: file-io: start: block=%" PRIu32 " request-read=%s\n", block, request_read ? "yes" : "no"); rc = rtems_rfs_buffer_handle_request (rtems_rfs_file_fs (handle), rtems_rfs_file_buffer (handle), block, request_read); if (rc > 0) return rc; } if (read && rtems_rfs_block_map_last (rtems_rfs_file_map (handle)) && rtems_rfs_block_map_size_offset (rtems_rfs_file_map (handle))) size = rtems_rfs_block_map_size_offset (rtems_rfs_file_map (handle)); else size = rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); *available = size - rtems_rfs_file_block_offset (handle); if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) printf ("rtems-rfs: file-io: start: available=%zu (%zu)\n", *available, size); return 0; }
int rtems_rfs_dir_read (rtems_rfs_file_system* fs, rtems_rfs_inode_handle* dir, rtems_rfs_pos_rel offset, struct dirent* dirent, size_t* length) { rtems_rfs_block_map map; rtems_rfs_buffer_handle buffer; rtems_rfs_block_no block; int rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_READ)) printf ("rtems-rfs: dir-read: dir=%" PRId32 " offset=%" PRId64 "\n", rtems_rfs_inode_ino (dir), offset); *length = 0; rc = rtems_rfs_block_map_open (fs, dir, &map); if (rc > 0) return rc; if (((rtems_rfs_fs_block_size (fs) - (offset % rtems_rfs_fs_block_size (fs))) <= RTEMS_RFS_DIR_ENTRY_SIZE)) offset = (((offset / rtems_rfs_fs_block_size (fs)) + 1) * rtems_rfs_fs_block_size (fs)); rc = rtems_rfs_block_map_seek (fs, &map, offset, &block); if (rc > 0) { if (rc == ENXIO) rc = ENOENT; rtems_rfs_block_map_close (fs, &map); return rc; } rc = rtems_rfs_buffer_handle_open (fs, &buffer); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); return rc; } /* * Look for an empty entry and if this is the last block that is the end of * the directory. */ while (rc == 0) { uint8_t* entry; rtems_rfs_ino eino; int elength; int remaining; rc = rtems_rfs_buffer_handle_request (fs, &buffer, block, true); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return rc; } entry = rtems_rfs_buffer_data (&buffer); entry += map.bpos.boff; elength = rtems_rfs_dir_entry_length (entry); eino = rtems_rfs_dir_entry_ino (entry); if (elength != RTEMS_RFS_DIR_ENTRY_EMPTY) { if (rtems_rfs_dir_entry_valid (fs, elength, eino)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_READ)) printf ("rtems-rfs: dir-read: " "bad length or ino for ino %" PRIu32 ": %u/%" PRId32 " @ %04" PRIx32 "\n", rtems_rfs_inode_ino (dir), elength, eino, map.bpos.boff); rc = EIO; break; } memset (dirent, 0, sizeof (struct dirent)); dirent->d_off = offset; dirent->d_reclen = sizeof (struct dirent); *length += elength; remaining = rtems_rfs_fs_block_size (fs) - (map.bpos.boff + elength); if (remaining <= RTEMS_RFS_DIR_ENTRY_SIZE) *length += remaining; elength -= RTEMS_RFS_DIR_ENTRY_SIZE; if (elength > NAME_MAX) elength = NAME_MAX; memcpy (dirent->d_name, entry + RTEMS_RFS_DIR_ENTRY_SIZE, elength); dirent->d_ino = rtems_rfs_dir_entry_ino (entry); dirent->d_namlen = elength; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_READ)) printf ("rtems-rfs: dir-read: found off:%" PRIooff_t " ino:%ld name=%s\n", dirent->d_off, dirent->d_ino, dirent->d_name); break; } *length += rtems_rfs_fs_block_size (fs) - map.bpos.boff; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_READ)) printf ("rtems-rfs: dir-read: next block: off:%" PRId64 " length:%zd\n", offset, *length); rc = rtems_rfs_block_map_next_block (fs, &map, &block); if (rc == ENXIO) rc = ENOENT; } rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return rc; }
int rtems_rfs_dir_empty (rtems_rfs_file_system* fs, rtems_rfs_inode_handle* dir) { rtems_rfs_block_map map; rtems_rfs_buffer_handle buffer; rtems_rfs_block_no block; bool empty; int rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_READ)) printf ("rtems-rfs: dir-empty: dir=%" PRId32 "\n", rtems_rfs_inode_ino (dir)); empty = true; rc = rtems_rfs_block_map_open (fs, dir, &map); if (rc > 0) return rc; rc = rtems_rfs_block_map_seek (fs, &map, 0, &block); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); return rc; } rc = rtems_rfs_buffer_handle_open (fs, &buffer); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); return rc; } /* * Look for an empty entry and if this is the last block that is the end of * the directory. */ while (empty) { uint8_t* entry; int offset; rc = rtems_rfs_buffer_handle_request (fs, &buffer, block, true); if (rc > 0) break; entry = rtems_rfs_buffer_data (&buffer); offset = 0; while (offset < (rtems_rfs_fs_block_size (fs) - RTEMS_RFS_DIR_ENTRY_SIZE)) { rtems_rfs_ino eino; int elength; elength = rtems_rfs_dir_entry_length (entry); eino = rtems_rfs_dir_entry_ino (entry); if (elength == RTEMS_RFS_DIR_ENTRY_EMPTY) break; if (rtems_rfs_dir_entry_valid (fs, elength, eino)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_EMPTY)) printf ("rtems-rfs: dir-empty: " "bad length or ino for ino %" PRIu32 ": %u/%" PRIu32 " @ %04x\n", rtems_rfs_inode_ino (dir), elength, eino, offset); rc = EIO; break; } /* * Ignore the current (.) and parent (..) entries. Anything else means * the directory is not empty. */ if (((elength != (RTEMS_RFS_DIR_ENTRY_SIZE + 1)) || (entry[RTEMS_RFS_DIR_ENTRY_SIZE] != '.')) && ((elength != (RTEMS_RFS_DIR_ENTRY_SIZE + 2)) || (entry[RTEMS_RFS_DIR_ENTRY_SIZE] != '.') || (entry[RTEMS_RFS_DIR_ENTRY_SIZE + 1] != '.'))) { empty = false; break; } entry += elength; offset += elength; } if (empty) { rc = rtems_rfs_block_map_next_block (fs, &map, &block); if (rc > 0) { if (rc == ENXIO) rc = 0; break; } } } if ((rc == 0) && !empty) rc = ENOTEMPTY; rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return rc; }
static int rtems_rfs_fs_read_superblock (rtems_rfs_file_system* fs) { rtems_rfs_buffer_handle handle; uint8_t* sb; int group; int rc; rc = rtems_rfs_buffer_handle_open (fs, &handle); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: handle open failed: %d: %s\n", rc, strerror (rc)); return rc; } rc = rtems_rfs_buffer_handle_request (fs, &handle, 0, true); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: request failed%d: %s\n", rc, strerror (rc)); return rc; } sb = rtems_rfs_buffer_data (&handle); #define read_sb(_o) rtems_rfs_read_u32 (sb + (_o)) if (read_sb (RTEMS_RFS_SB_OFFSET_MAGIC) != RTEMS_RFS_SB_MAGIC) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: invalid superblock, bad magic\n"); rtems_rfs_buffer_handle_close (fs, &handle); return EIO; } fs->blocks = read_sb (RTEMS_RFS_SB_OFFSET_BLOCKS); fs->block_size = read_sb (RTEMS_RFS_SB_OFFSET_BLOCK_SIZE); if (rtems_rfs_fs_size(fs) > rtems_rfs_fs_media_size (fs)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: invalid superblock block/size count\n"); rtems_rfs_buffer_handle_close (fs, &handle); return EIO; } if ((read_sb (RTEMS_RFS_SB_OFFSET_VERSION) & RTEMS_RFS_VERSION_MASK) != (RTEMS_RFS_VERSION * RTEMS_RFS_VERSION_MASK)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: incompatible version: %08" PRIx32 " (%08" PRIx32 ")\n", read_sb (RTEMS_RFS_SB_OFFSET_VERSION), RTEMS_RFS_VERSION_MASK); rtems_rfs_buffer_handle_close (fs, &handle); return EIO; } if (read_sb (RTEMS_RFS_SB_OFFSET_INODE_SIZE) != RTEMS_RFS_INODE_SIZE) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: inode size mismatch: fs:%" PRId32 " target:%" PRId32 "\n", read_sb (RTEMS_RFS_SB_OFFSET_VERSION), RTEMS_RFS_VERSION_MASK); rtems_rfs_buffer_handle_close (fs, &handle); return EIO; } fs->bad_blocks = read_sb (RTEMS_RFS_SB_OFFSET_BAD_BLOCKS); fs->max_name_length = read_sb (RTEMS_RFS_SB_OFFSET_MAX_NAME_LENGTH); fs->group_count = read_sb (RTEMS_RFS_SB_OFFSET_GROUPS); fs->group_blocks = read_sb (RTEMS_RFS_SB_OFFSET_GROUP_BLOCKS); fs->group_inodes = read_sb (RTEMS_RFS_SB_OFFSET_GROUP_INODES); fs->blocks_per_block = rtems_rfs_fs_block_size (fs) / sizeof (rtems_rfs_inode_block); fs->block_map_singly_blocks = fs->blocks_per_block * RTEMS_RFS_INODE_BLOCKS; fs->block_map_doubly_blocks = fs->blocks_per_block * fs->blocks_per_block * RTEMS_RFS_INODE_BLOCKS; fs->inodes = fs->group_count * fs->group_inodes; fs->inodes_per_block = fs->block_size / RTEMS_RFS_INODE_SIZE; if (fs->group_blocks > rtems_rfs_bitmap_numof_bits (rtems_rfs_fs_block_size (fs))) { rtems_rfs_buffer_handle_close (fs, &handle); if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: groups blocks larger than block bits\n"); return EIO; } rtems_rfs_buffer_handle_close (fs, &handle); /* * Change the block size to the value in the superblock. */ rc = rtems_rfs_buffer_setblksize (fs, rtems_rfs_fs_block_size (fs)); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: invalid superblock block size%d: %s\n", rc, strerror (rc)); return rc; } fs->groups = calloc (fs->group_count, sizeof (rtems_rfs_group)); if (!fs->groups) { rtems_rfs_buffer_handle_close (fs, &handle); if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: no memory for group table\n"); return ENOMEM; } /* * Perform each phase of group initialisation at the same time. This way we * know how far the initialisation has gone if an error occurs and we need to * close everything. */ for (group = 0; group < fs->group_count; group++) { rc = rtems_rfs_group_open (fs, rtems_rfs_fs_block (fs, group, 0), fs->group_blocks, fs->group_inodes, &fs->groups[group]); if (rc > 0) { int g; for (g = 0; g < group; g++) rtems_rfs_group_close (fs, &fs->groups[g]); rtems_rfs_buffer_handle_close (fs, &handle); if (rtems_rfs_trace (RTEMS_RFS_TRACE_OPEN)) printf ("rtems-rfs: read-superblock: no memory for group table%d: %s\n", rc, strerror (rc)); return rc; } } return 0; }
static bool rtems_rfs_write_superblock (rtems_rfs_file_system* fs) { rtems_rfs_buffer_handle handle; uint8_t* sb; int rc; rc = rtems_rfs_buffer_handle_open (fs, &handle); if (rc > 0) { printf ("rtems-rfs: write-superblock: handle open failed: %d: %s\n", rc, strerror (rc)); return false; } rc = rtems_rfs_buffer_handle_request (fs, &handle, 0, false); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); printf ("rtems-rfs: write-superblock: request failed: %d: %s\n", rc, strerror (rc)); return false; } sb = rtems_rfs_buffer_data (&handle); #define write_sb(_o, _d) rtems_rfs_write_u32(sb + (_o), _d) memset (sb, 0xff, rtems_rfs_fs_block_size (fs)); write_sb (RTEMS_RFS_SB_OFFSET_MAGIC, RTEMS_RFS_SB_MAGIC); write_sb (RTEMS_RFS_SB_OFFSET_VERSION, RTEMS_RFS_VERSION); write_sb (RTEMS_RFS_SB_OFFSET_BLOCKS, rtems_rfs_fs_blocks (fs)); write_sb (RTEMS_RFS_SB_OFFSET_BLOCK_SIZE, rtems_rfs_fs_block_size (fs)); write_sb (RTEMS_RFS_SB_OFFSET_BAD_BLOCKS, fs->bad_blocks); write_sb (RTEMS_RFS_SB_OFFSET_MAX_NAME_LENGTH, fs->max_name_length); write_sb (RTEMS_RFS_SB_OFFSET_GROUPS, fs->group_count); write_sb (RTEMS_RFS_SB_OFFSET_GROUP_BLOCKS, fs->group_blocks); write_sb (RTEMS_RFS_SB_OFFSET_GROUP_INODES, fs->group_inodes); write_sb (RTEMS_RFS_SB_OFFSET_INODE_SIZE, RTEMS_RFS_INODE_SIZE); rtems_rfs_buffer_mark_dirty (&handle); rc = rtems_rfs_buffer_handle_release (fs, &handle); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); printf ("rtems-rfs: write-superblock: buffer release failed: %d: %s\n", rc, strerror (rc)); return false; } rc = rtems_rfs_buffer_handle_close (fs, &handle); if (rc > 0) { printf ("rtems-rfs: write-superblock: buffer handle close failed: %d: %s\n", rc, strerror (rc)); return false; } return true; }
* @param pathloc * @param sb * @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; } /**
int rtems_rfs_dir_add_entry (rtems_rfs_file_system* fs, rtems_rfs_inode_handle* dir, const char* name, size_t length, rtems_rfs_ino ino) { rtems_rfs_block_map map; rtems_rfs_block_pos bpos; rtems_rfs_buffer_handle buffer; int rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_ADD_ENTRY)) { int c; printf ("rtems-rfs: dir-add-entry: dir=%" PRId32 ", name=", rtems_rfs_inode_ino (dir)); for (c = 0; c < length; c++) printf ("%c", name[c]); printf (", len=%zd\n", length); } rc = rtems_rfs_block_map_open (fs, dir, &map); if (rc > 0) return rc; rc = rtems_rfs_buffer_handle_open (fs, &buffer); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); return rc; } /* * Search the map from the beginning to find any empty space. */ rtems_rfs_block_set_bpos_zero (&bpos); while (true) { rtems_rfs_block_no block; uint8_t* entry; int offset; bool read = true; /* * Locate the first block. If an error the block will be 0. If the map is * empty which happens when creating a directory and adding the first entry * the seek will return ENXIO. In this case we need to grow the directory. */ rc = rtems_rfs_block_map_find (fs, &map, &bpos, &block); if (rc > 0) { if (rc != ENXIO) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_ADD_ENTRY)) printf ("rtems-rfs: dir-add-entry: " "block map find failed for ino %" PRIu32 ": %d: %s\n", rtems_rfs_inode_ino (dir), rc, strerror (rc)); break; } /* * We have reached the end of the directory so add a block. */ rc = rtems_rfs_block_map_grow (fs, &map, 1, &block); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_ADD_ENTRY)) printf ("rtems-rfs: dir-add-entry: " "block map grow failed for ino %" PRIu32 ": %d: %s\n", rtems_rfs_inode_ino (dir), rc, strerror (rc)); break; } read = false; } bpos.bno++; rc = rtems_rfs_buffer_handle_request (fs, &buffer, block, read); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_ADD_ENTRY)) printf ("rtems-rfs: dir-add-entry: " "block buffer req failed for ino %" PRIu32 ": %d: %s\n", rtems_rfs_inode_ino (dir), rc, strerror (rc)); break; } entry = rtems_rfs_buffer_data (&buffer); if (!read) memset (entry, 0xff, rtems_rfs_fs_block_size (fs)); offset = 0; while (offset < (rtems_rfs_fs_block_size (fs) - RTEMS_RFS_DIR_ENTRY_SIZE)) { rtems_rfs_ino eino; int elength; elength = rtems_rfs_dir_entry_length (entry); eino = rtems_rfs_dir_entry_ino (entry); if (elength == RTEMS_RFS_DIR_ENTRY_EMPTY) { if ((length + RTEMS_RFS_DIR_ENTRY_SIZE) < (rtems_rfs_fs_block_size (fs) - offset)) { uint32_t hash; hash = rtems_rfs_dir_hash (name, length); rtems_rfs_dir_set_entry_hash (entry, hash); rtems_rfs_dir_set_entry_ino (entry, ino); rtems_rfs_dir_set_entry_length (entry, RTEMS_RFS_DIR_ENTRY_SIZE + length); memcpy (entry + RTEMS_RFS_DIR_ENTRY_SIZE, name, length); rtems_rfs_buffer_mark_dirty (&buffer); rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return 0; } break; } if (rtems_rfs_dir_entry_valid (fs, elength, eino)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_ADD_ENTRY)) printf ("rtems-rfs: dir-add-entry: " "bad length or ino for ino %" PRIu32 ": %u/%" PRId32 " @ %04x\n", rtems_rfs_inode_ino (dir), elength, eino, offset); rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return EIO; } entry += elength; offset += elength; } } rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return rc; }
static int rtems_rfs_shell_block (rtems_rfs_file_system* fs, int argc, char *argv[]) { rtems_rfs_buffer_handle buffer; rtems_rfs_block_no block; uint8_t* data; bool state; int b; int rc; if (argc <= 1) { printf ("error: no block number provided\n"); return 1; } block = strtoul (argv[1], 0, 0); rtems_rfs_shell_lock_rfs (fs); rc = rtems_rfs_group_bitmap_test (fs, false, block, &state); if (rc > 0) { rtems_rfs_shell_unlock_rfs (fs); printf ("error: testing block state: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } printf (" %5" PRIu32 ": block %s\n", block, state ? "allocated" : "free"); rc = rtems_rfs_buffer_handle_open (fs, &buffer); if (rc > 0) { rtems_rfs_shell_unlock_rfs (fs); printf ("error: opening buffer handle: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } rc = rtems_rfs_buffer_handle_request (fs, &buffer, block, true); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_shell_unlock_rfs (fs); printf ("error: requesting buffer handle: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } for (b = 0, data = rtems_rfs_buffer_data (&buffer); b < rtems_rfs_fs_block_size (fs); b++, data++) { int mod = b % 16; if (mod == 0) { if (b) printf ("\n"); printf ("%04x ", b); } if (mod == 8) printf (" "); printf ("%02x ", *data); } printf ("\n"); rc = rtems_rfs_buffer_handle_close (fs, &buffer); if (rc > 0) { rtems_rfs_shell_unlock_rfs (fs); printf ("error: closing buffer handle: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } rtems_rfs_shell_unlock_rfs (fs); return 0; }
static int rtems_rfs_shell_dir (rtems_rfs_file_system* fs, int argc, char *argv[]) { rtems_rfs_buffer_handle buffer; rtems_rfs_block_no block; uint8_t* data; bool state; int entry; int b; int rc; if (argc <= 1) { printf ("error: no block number provided\n"); return 1; } block = strtoul (argv[1], 0, 0); rtems_rfs_shell_lock_rfs (fs); rc = rtems_rfs_group_bitmap_test (fs, false, block, &state); if (rc > 0) { rtems_rfs_shell_unlock_rfs (fs); printf ("error: testing block state: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } printf (" %5" PRIu32 ": block %s\n", block, state ? "allocated" : "free"); rc = rtems_rfs_buffer_handle_open (fs, &buffer); if (rc > 0) { rtems_rfs_shell_unlock_rfs (fs); printf ("error: opening buffer handle: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } rc = rtems_rfs_buffer_handle_request (fs, &buffer, block, true); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_shell_unlock_rfs (fs); printf ("error: requesting buffer handle: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } b = 0; entry = 1; data = rtems_rfs_buffer_data (&buffer); while (b < (rtems_rfs_fs_block_size (fs) - RTEMS_RFS_DIR_ENTRY_SIZE - 1)) { rtems_rfs_ino eino; int elength; int length; int c; eino = rtems_rfs_dir_entry_ino (data); elength = rtems_rfs_dir_entry_length (data); if (elength == RTEMS_RFS_DIR_ENTRY_EMPTY) break; if ((elength < RTEMS_RFS_DIR_ENTRY_SIZE) || (elength >= rtems_rfs_fs_max_name (fs))) { printf (" %5d: entry length appears corrupt: %d\n", entry, elength); break; } if ((eino < RTEMS_RFS_ROOT_INO) || (eino >= rtems_rfs_fs_inodes (fs))) { printf (" %5d: entry ino appears corrupt: ino=%" PRId32 "\n", entry, eino); break; } length = elength - RTEMS_RFS_DIR_ENTRY_SIZE; printf (" %5d: %04x inode=%-6" PRIu32 " hash=%08" PRIx32 " name[%03u]=", entry, b, rtems_rfs_dir_entry_ino (data), rtems_rfs_dir_entry_hash (data), length); if (length > 50) length = 50; for (c = 0; c < length; c++) printf ("%c", data[RTEMS_RFS_DIR_ENTRY_SIZE + c]); if (length < elength - RTEMS_RFS_DIR_ENTRY_SIZE) printf ("..."); printf ("\n"); b += elength; data += elength; entry++; } rc = rtems_rfs_buffer_handle_close (fs, &buffer); if (rc > 0) { rtems_rfs_shell_unlock_rfs (fs); printf ("error: closing buffer handle: block=%" PRIu32 ": (%d) %s\n", block, rc, strerror (rc)); return 1; } rtems_rfs_shell_unlock_rfs (fs); return 0; }
static bool rtems_rfs_check_config (rtems_rfs_file_system* fs, const rtems_rfs_format_config* config) { fs->block_size = config->block_size; if (!fs->block_size) { uint64_t total_size = rtems_rfs_fs_media_size (fs); if (total_size >= GIGS (1)) { uint32_t gigs = (total_size + GIGS (1)) / GIGS (1); int b; for (b = 31; b > 0; b--) if ((gigs & (1 << b)) != 0) break; fs->block_size = 1 << b; } if (fs->block_size < 512) fs->block_size = 512; if (fs->block_size > (4 * 1024)) fs->block_size = (4 * 1024); } if ((fs->block_size % rtems_rfs_fs_media_block_size (fs)) != 0) { printf ("block size (%zd) is not a multiple of media block size (%" PRId32 ")\n", fs->block_size, rtems_rfs_fs_media_block_size (fs)); return false; } fs->group_blocks = config->group_blocks; if (!fs->group_blocks) { /* * The number of blocks per group is defined by the number of bits in a * block. */ fs->group_blocks = rtems_rfs_bitmap_numof_bits (fs->block_size); } if (fs->group_blocks > rtems_rfs_bitmap_numof_bits (fs->block_size)) { printf ("group block count is higher than bits in block\n"); return false; } fs->blocks = rtems_rfs_fs_media_size (fs) / fs->block_size; /* * The bits per block sets the upper limit for the number of blocks in a * group. The disk will be divided into groups which are the number of bits * per block. */ fs->group_count = rtems_rfs_rup_quotient (rtems_rfs_fs_blocks (fs), rtems_rfs_bits_per_block (fs)); fs->group_inodes = config->group_inodes; if (!fs->group_inodes) { int inode_overhead = RTEMS_RFS_INODE_OVERHEAD_PERCENTAGE; /* * The number of inodes per group is set as a percentage. */ if (config->inode_overhead) inode_overhead = config->inode_overhead; fs->group_inodes = rtems_rfs_inodes_from_percent (fs, inode_overhead); } /* * Round up to fill a block because the minimum allocation unit is a block. */ fs->inodes_per_block = rtems_rfs_fs_block_size (fs) / RTEMS_RFS_INODE_SIZE; fs->group_inodes = rtems_rfs_rup_quotient (fs->group_inodes, fs->inodes_per_block) * fs->inodes_per_block; if (fs->group_inodes > rtems_rfs_bitmap_numof_bits (fs->block_size)) fs->group_inodes = rtems_rfs_bitmap_numof_bits (fs->block_size); fs->max_name_length = config->max_name_length; if (!fs->max_name_length) { fs->max_name_length = 512; } return true; }
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; }
/** * Return the number of bits that fit in the block size. */ static int rtems_rfs_bits_per_block (rtems_rfs_file_system* fs) { return rtems_rfs_bitmap_numof_bits (rtems_rfs_fs_block_size (fs)); }
int rtems_rfs_file_set_size (rtems_rfs_file_handle* handle, rtems_rfs_pos new_size) { rtems_rfs_block_map* map = rtems_rfs_file_map (handle); rtems_rfs_pos size; int rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_FILE_IO)) printf ("rtems-rfs: file-set-size: size=%" PRIu64 "\n", new_size); size = rtems_rfs_file_size (handle); /* * If the file is same size do nothing else grow or shrink it ? * * If the file does not change size do not update the times. */ if (size != new_size) { /* * Short cut for the common truncate on open call. */ if (new_size == 0) { rc = rtems_rfs_block_map_free_all (rtems_rfs_file_fs (handle), map); if (rc > 0) return rc; } else { if (size < new_size) { /* * Grow. Fill with 0's. */ rtems_rfs_pos count; uint32_t length; bool read_block; count = new_size - size; length = rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); read_block = false; while (count) { rtems_rfs_buffer_block block; rtems_rfs_block_pos bpos; uint8_t* dst; /* * Get the block position for the current end of the file as seen by * the map. If not found and the EOF grow the map then fill the block * with 0. */ rtems_rfs_block_size_get_bpos (rtems_rfs_block_map_size (map), &bpos); rc = rtems_rfs_block_map_find (rtems_rfs_file_fs (handle), map, &bpos, &block); if (rc > 0) { /* * Have we reached the EOF ? */ if (rc != ENXIO) return rc; rc = rtems_rfs_block_map_grow (rtems_rfs_file_fs (handle), map, 1, &block); if (rc > 0) return rc; } if (count < (length - bpos.boff)) { length = count + bpos.boff; read_block = true; rtems_rfs_block_map_set_size_offset (map, length); } else { rtems_rfs_block_map_set_size_offset (map, 0); } /* * Only read the block if the length is not the block size. */ rc = rtems_rfs_buffer_handle_request (rtems_rfs_file_fs (handle), rtems_rfs_file_buffer (handle), block, read_block); if (rc > 0) return rc; dst = rtems_rfs_buffer_data (&handle->buffer); memset (dst + bpos.boff, 0, length - bpos.boff); rtems_rfs_buffer_mark_dirty (rtems_rfs_file_buffer (handle)); rc = rtems_rfs_buffer_handle_release (rtems_rfs_file_fs (handle), rtems_rfs_file_buffer (handle)); if (rc > 0) return rc; count -= length - bpos.boff; } } else { /* * Shrink */ rtems_rfs_block_no blocks; uint32_t offset; blocks = rtems_rfs_block_map_count (map) - (((new_size - 1) / rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle))) + 1); offset = new_size % rtems_rfs_fs_block_size (rtems_rfs_file_fs (handle)); if (blocks) { int rc; rc = rtems_rfs_block_map_shrink (rtems_rfs_file_fs (handle), rtems_rfs_file_map (handle), blocks); if (rc > 0) return rc; } rtems_rfs_block_map_set_size_offset (map, offset); if (rtems_rfs_block_pos_past_end (rtems_rfs_file_bpos (handle), rtems_rfs_block_map_size (map))) rtems_rfs_block_size_get_bpos (rtems_rfs_block_map_size (map), rtems_rfs_file_bpos (handle)); } } handle->shared->size.count = rtems_rfs_block_map_count (map); handle->shared->size.offset = rtems_rfs_block_map_size_offset (map); if (rtems_rfs_file_update_mtime (handle)) handle->shared->mtime = time (NULL); } return 0; }
int rtems_rfs_dir_del_entry (rtems_rfs_file_system* fs, rtems_rfs_inode_handle* dir, rtems_rfs_ino ino, uint32_t offset) { rtems_rfs_block_map map; rtems_rfs_block_no block; rtems_rfs_buffer_handle buffer; bool search; int rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_DEL_ENTRY)) printf ("rtems-rfs: dir-del-entry: dir=%" PRId32 ", entry=%" PRId32 " offset=%" PRIu32 "\n", rtems_rfs_inode_ino (dir), ino, offset); rc = rtems_rfs_block_map_open (fs, dir, &map); if (rc > 0) return rc; rc = rtems_rfs_block_map_seek (fs, &map, offset, &block); if (rc > 0) { if (rc == ENXIO) rc = ENOENT; rtems_rfs_block_map_close (fs, &map); return rc; } rc = rtems_rfs_buffer_handle_open (fs, &buffer); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); return rc; } /* * Only search if the offset is 0 else we are at that position. */ search = offset ? false : true; while (rc == 0) { uint8_t* entry; int eoffset; rc = rtems_rfs_buffer_handle_request (fs, &buffer, block, true); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_DEL_ENTRY)) printf ("rtems-rfs: dir-del-entry: " "block buffer req failed for ino %" PRIu32 ": %d: %s\n", rtems_rfs_inode_ino (dir), rc, strerror (rc)); break; } /* * If we are searching start at the beginning of the block. If not searching * skip to the offset in the block. */ if (search) eoffset = 0; else eoffset = offset % rtems_rfs_fs_block_size (fs); entry = rtems_rfs_buffer_data (&buffer) + eoffset; while (eoffset < (rtems_rfs_fs_block_size (fs) - RTEMS_RFS_DIR_ENTRY_SIZE)) { rtems_rfs_ino eino; int elength; elength = rtems_rfs_dir_entry_length (entry); eino = rtems_rfs_dir_entry_ino (entry); if (elength == RTEMS_RFS_DIR_ENTRY_EMPTY) break; if (rtems_rfs_dir_entry_valid (fs, elength, eino)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_DEL_ENTRY)) printf ("rtems-rfs: dir-del-entry: " "bad length or ino for ino %" PRIu32 ": %u/%" PRId32 " @ %" PRIu32 ".%04x\n", rtems_rfs_inode_ino (dir), elength, eino, block, eoffset); rc = EIO; break; } if (ino == rtems_rfs_dir_entry_ino (entry)) { uint32_t remaining; remaining = rtems_rfs_fs_block_size (fs) - (eoffset + elength); memmove (entry, entry + elength, remaining); memset (entry + remaining, 0xff, elength); /* * If the remainder of the block is empty and this is the start of the * block and it is the last block in the map shrink the map. * * @note We could check again to see if the new end block in the map is * also empty. This way we could clean up an empty directory. */ elength = rtems_rfs_dir_entry_length (entry); if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_DEL_ENTRY)) printf ("rtems-rfs: dir-del-entry: " "last block free for ino %" PRIu32 ": elength=%i block=%" PRIu32 " offset=%d last=%s\n", ino, elength, block, eoffset, rtems_rfs_block_map_last (&map) ? "yes" : "no"); if ((elength == RTEMS_RFS_DIR_ENTRY_EMPTY) && (eoffset == 0) && rtems_rfs_block_map_last (&map)) { rc = rtems_rfs_block_map_shrink (fs, &map, 1); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_DEL_ENTRY)) printf ("rtems-rfs: dir-del-entry: " "block map shrink failed for ino %" PRIu32 ": %d: %s\n", rtems_rfs_inode_ino (dir), rc, strerror (rc)); } } rtems_rfs_buffer_mark_dirty (&buffer); rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return 0; } if (!search) { rc = EIO; break; } entry += elength; eoffset += elength; } if (rc == 0) { rc = rtems_rfs_block_map_next_block (fs, &map, &block); if (rc == ENXIO) rc = ENOENT; } } rtems_rfs_buffer_handle_close (fs, &buffer); rtems_rfs_block_map_close (fs, &map); return rc; }
int rtems_rfs_symlink (rtems_rfs_file_system* fs, const char* name, int length, const char* link, int link_length, uid_t uid, gid_t gid, rtems_rfs_ino parent) { rtems_rfs_inode_handle inode; rtems_rfs_ino ino; int rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_SYMLINK)) { int c; printf ("rtems-rfs: symlink: parent:%" PRIu32 " name:", parent); for (c = 0; c < length; c++) printf ("%c", name[c]); printf (" link:"); for (c = 0; c < link_length; c++) printf ("%c", link[c]); } if (link_length >= rtems_rfs_fs_block_size (fs)) return ENAMETOOLONG; rc = rtems_rfs_inode_create (fs, parent, name, strlen (name), RTEMS_RFS_S_SYMLINK, 1, uid, gid, &ino); if (rc > 0) return rc; rc = rtems_rfs_inode_open (fs, ino, &inode, true); if (rc > 0) return rc; /* * If the link length is less than the length of data union in the inode * place the link into the data area else allocate a block and write the link * to that. */ if (link_length < RTEMS_RFS_INODE_DATA_NAME_SIZE) { memset (inode.node->data.name, 0, RTEMS_RFS_INODE_DATA_NAME_SIZE); memcpy (inode.node->data.name, link, link_length); rtems_rfs_inode_set_block_count (&inode, 0); } else { rtems_rfs_block_map map; rtems_rfs_block_no block; rtems_rfs_buffer_handle buffer; uint8_t* data; rc = rtems_rfs_block_map_open (fs, &inode, &map); if (rc > 0) { rtems_rfs_inode_close (fs, &inode); return rc; } rc = rtems_rfs_block_map_grow (fs, &map, 1, &block); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); rtems_rfs_inode_close (fs, &inode); return rc; } rc = rtems_rfs_buffer_handle_open (fs, &buffer); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); rtems_rfs_inode_close (fs, &inode); return rc; } rc = rtems_rfs_buffer_handle_request (fs, &buffer, block, false); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); rtems_rfs_inode_close (fs, &inode); return rc; } data = rtems_rfs_buffer_data (&buffer); memset (data, 0xff, rtems_rfs_fs_block_size (fs)); memcpy (data, link, link_length); rc = rtems_rfs_buffer_handle_close (fs, &buffer); if (rc > 0) { rtems_rfs_block_map_close (fs, &map); rtems_rfs_inode_close (fs, &inode); return rc; } rc = rtems_rfs_block_map_close (fs, &map); if (rc > 0) { rtems_rfs_inode_close (fs, &inode); return rc; } } rtems_rfs_inode_set_block_offset (&inode, link_length); rc = rtems_rfs_inode_close (fs, &inode); return rc; }
int rtems_rfs_dir_lookup_ino (rtems_rfs_file_system* fs, rtems_rfs_inode_handle* inode, const char* name, int length, rtems_rfs_ino* ino, uint32_t* offset) { rtems_rfs_block_map map; rtems_rfs_buffer_handle entries; int rc; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) { int c; printf ("rtems-rfs: dir-lookup-ino: lookup ino: root=%" PRId32 ", path=", inode->ino); for (c = 0; c < length; c++) printf ("%c", name[c]); printf (", len=%d\n", length); } *ino = RTEMS_RFS_EMPTY_INO; *offset = 0; rc = rtems_rfs_block_map_open (fs, inode, &map); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: map open failed for ino %" PRIu32 ": %d: %s", rtems_rfs_inode_ino (inode), rc, strerror (rc)); return rc; } rc = rtems_rfs_buffer_handle_open (fs, &entries); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: handle open failed for ino %" PRIu32 ": %d: %s", rtems_rfs_inode_ino (inode), rc, strerror (rc)); rtems_rfs_block_map_close (fs, &map); return rc; } else { rtems_rfs_block_no block; uint32_t hash; /* * Calculate the hash of the look up string. */ hash = rtems_rfs_dir_hash (name, length); /* * Locate the first block. The map points to the start after open so just * seek 0. If an error the block will be 0. */ rc = rtems_rfs_block_map_seek (fs, &map, 0, &block); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: block map find failed: %d: %s\n", rc, strerror (rc)); if (rc == ENXIO) rc = ENOENT; rtems_rfs_buffer_handle_close (fs, &entries); rtems_rfs_block_map_close (fs, &map); return rc; } while ((rc == 0) && block) { uint8_t* entry; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: block read, ino=%" PRIu32 " bno=%" PRId32 "\n", rtems_rfs_inode_ino (inode), map.bpos.bno); rc = rtems_rfs_buffer_handle_request (fs, &entries, block, true); if (rc > 0) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: block read, ino=%" PRIu32 " block=%" PRId32 ": %d: %s\n", rtems_rfs_inode_ino (inode), block, rc, strerror (rc)); break; } /* * Search the block to see if the name matches. A hash of 0xffff or 0x0 * means the entry is empty. */ entry = rtems_rfs_buffer_data (&entries); map.bpos.boff = 0; while (map.bpos.boff < (rtems_rfs_fs_block_size (fs) - RTEMS_RFS_DIR_ENTRY_SIZE)) { uint32_t ehash; int elength; ehash = rtems_rfs_dir_entry_hash (entry); elength = rtems_rfs_dir_entry_length (entry); *ino = rtems_rfs_dir_entry_ino (entry); if (elength == RTEMS_RFS_DIR_ENTRY_EMPTY) break; if (rtems_rfs_dir_entry_valid (fs, elength, *ino)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: " "bad length or ino for ino %" PRIu32 ": %u/%" PRId32 " @ %04" PRIx32 "\n", rtems_rfs_inode_ino (inode), elength, *ino, map.bpos.boff); rc = EIO; break; } if (ehash == hash) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO_CHECK)) printf ("rtems-rfs: dir-lookup-ino: " "checking entry for ino %" PRId32 ": bno=%04" PRIx32 "/off=%04" PRIx32 " length:%d ino:%" PRId32 "\n", rtems_rfs_inode_ino (inode), map.bpos.bno, map.bpos.boff, elength, rtems_rfs_dir_entry_ino (entry)); if (memcmp (entry + RTEMS_RFS_DIR_ENTRY_SIZE, name, length) == 0) { *offset = rtems_rfs_block_map_pos (fs, &map); if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO_FOUND)) printf ("rtems-rfs: dir-lookup-ino: " "entry found in ino %" PRIu32 ", ino=%" PRIu32 " offset=%" PRIu32 "\n", rtems_rfs_inode_ino (inode), *ino, *offset); rtems_rfs_buffer_handle_close (fs, &entries); rtems_rfs_block_map_close (fs, &map); return 0; } } map.bpos.boff += elength; entry += elength; } if (rc == 0) { rc = rtems_rfs_block_map_next_block (fs, &map, &block); if ((rc > 0) && (rc != ENXIO)) { if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: " "block map next block failed in ino %" PRIu32 ": %d: %s\n", rtems_rfs_inode_ino (inode), rc, strerror (rc)); } if (rc == ENXIO) rc = ENOENT; } } if ((rc == 0) && (block == 0)) { rc = EIO; if (rtems_rfs_trace (RTEMS_RFS_TRACE_DIR_LOOKUP_INO)) printf ("rtems-rfs: dir-lookup-ino: block is 0 in ino %" PRIu32 ": %d: %s\n", rtems_rfs_inode_ino (inode), rc, strerror (rc)); } } rtems_rfs_buffer_handle_close (fs, &entries); rtems_rfs_block_map_close (fs, &map); return rc; }
int rtems_rfs_rtems_fstat (const rtems_filesystem_location_info_t* pathloc, struct stat* buf) { rtems_rfs_file_system* fs = rtems_rfs_rtems_pathloc_dev (pathloc); rtems_rfs_ino ino = rtems_rfs_rtems_get_pathloc_ino (pathloc); rtems_rfs_inode_handle inode; rtems_rfs_file_shared* shared; uint16_t mode; int rc; if (rtems_rfs_rtems_trace (RTEMS_RFS_RTEMS_DEBUG_STAT)) printf ("rtems-rfs-rtems: stat: in: ino:%" PRId32 "\n", ino); rc = rtems_rfs_inode_open (fs, ino, &inode, true); if (rc) { return rtems_rfs_rtems_error ("stat: opening inode", rc); } mode = rtems_rfs_inode_get_mode (&inode); if (RTEMS_RFS_S_ISCHR (mode) || RTEMS_RFS_S_ISBLK (mode)) { buf->st_rdev = rtems_filesystem_make_dev_t (rtems_rfs_inode_get_block (&inode, 0), rtems_rfs_inode_get_block (&inode, 1)); } buf->st_dev = rtems_rfs_fs_device (fs); buf->st_ino = rtems_rfs_inode_ino (&inode); buf->st_mode = rtems_rfs_rtems_mode (mode); buf->st_nlink = rtems_rfs_inode_get_links (&inode); buf->st_uid = rtems_rfs_inode_get_uid (&inode); buf->st_gid = rtems_rfs_inode_get_gid (&inode); /* * Need to check is the ino is an open file. If so we take the values from * the open file rather than the inode. */ shared = rtems_rfs_file_get_shared (fs, rtems_rfs_inode_ino (&inode)); if (shared) { buf->st_atime = rtems_rfs_file_shared_get_atime (shared); buf->st_mtime = rtems_rfs_file_shared_get_mtime (shared); buf->st_ctime = rtems_rfs_file_shared_get_ctime (shared); buf->st_blocks = rtems_rfs_file_shared_get_block_count (shared); if (S_ISLNK (buf->st_mode)) buf->st_size = rtems_rfs_file_shared_get_block_offset (shared); else buf->st_size = rtems_rfs_file_shared_get_size (fs, shared); } else { buf->st_atime = rtems_rfs_inode_get_atime (&inode); buf->st_mtime = rtems_rfs_inode_get_mtime (&inode); buf->st_ctime = rtems_rfs_inode_get_ctime (&inode); buf->st_blocks = rtems_rfs_inode_get_block_count (&inode); if (S_ISLNK (buf->st_mode)) buf->st_size = rtems_rfs_inode_get_block_offset (&inode); else buf->st_size = rtems_rfs_inode_get_size (fs, &inode); } buf->st_blksize = rtems_rfs_fs_block_size (fs); rc = rtems_rfs_inode_close (fs, &inode); if (rc > 0) { return rtems_rfs_rtems_error ("stat: closing inode", rc); } return 0; }
static bool rtems_rfs_write_group (rtems_rfs_file_system* fs, int group, bool initialise_inodes, bool verbose) { rtems_rfs_buffer_handle handle; rtems_rfs_bitmap_control bitmap; rtems_rfs_buffer_block group_base; size_t group_size; int blocks; int b; int rc; group_base = rtems_rfs_fs_block (fs, group, 0); if (group_base > rtems_rfs_fs_blocks (fs)) { printf ("rtems-rfs: write-group: group %d base beyond disk limit\n", group); return false; } group_size = fs->group_blocks; /* * Be nice to strange sizes of disks. These are embedded systems after all * and nice numbers do not always work out. Let the last block pick up the * remainder of the blocks. */ if ((group_base + group_size) > rtems_rfs_fs_blocks (fs)) group_size = rtems_rfs_fs_blocks (fs) - group_base; if (verbose) printf ("\rrtems-rfs: format: group %3d: base = %" PRId32 ", size = %zd", group, group_base, group_size); /* * Open a handle and request an empty buffer. */ rc = rtems_rfs_buffer_handle_open (fs, &handle); if (rc > 0) { printf ("\nrtems-rfs: write-group: handle open failed: %d: %s\n", rc, strerror (rc)); return false; } if (verbose) printf (", blocks"); /* * Open the block bitmap using the new buffer. */ rc = rtems_rfs_bitmap_open (&bitmap, fs, &handle, group_size, group_base + RTEMS_RFS_GROUP_BLOCK_BITMAP_BLOCK); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); printf ("\nrtems-rfs: write-group: group %3d: open block bitmap failed: %d: %s\n", group, rc, strerror (rc)); return false; } /* * Force the whole buffer to a known state. The bit map may not occupy the * whole block. */ memset (rtems_rfs_buffer_data (&handle), 0xff, rtems_rfs_fs_block_size (fs)); /* * Clear the bitmap. */ rc = rtems_rfs_bitmap_map_clear_all (&bitmap); if (rc > 0) { rtems_rfs_bitmap_close (&bitmap); rtems_rfs_buffer_handle_close (fs, &handle); printf ("\nrtems-rfs: write-group: group %3d: block bitmap clear all failed: %d: %s\n", group, rc, strerror (rc)); return false; } /* * Forced allocation of the block bitmap. */ rtems_rfs_bitmap_map_set (&bitmap, RTEMS_RFS_GROUP_BLOCK_BITMAP_BLOCK); /* * Forced allocation of the inode bitmap. */ rtems_rfs_bitmap_map_set (&bitmap, RTEMS_RFS_GROUP_INODE_BITMAP_BLOCK); /* * Determine the number of inodes blocks in the group. */ blocks = rtems_rfs_rup_quotient (fs->group_inodes, fs->inodes_per_block); /* * Forced allocation of the inode blocks which follow the block bitmap. */ for (b = 0; b < blocks; b++) rtems_rfs_bitmap_map_set (&bitmap, b + RTEMS_RFS_GROUP_INODE_BLOCK); /* * Close the block bitmap. */ rc = rtems_rfs_bitmap_close (&bitmap); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); printf ("\nrtems-rfs: write-group: group %3d: close block bitmap failed: %d: %s\n", group, rc, strerror (rc)); return false; } rtems_rfs_buffer_mark_dirty (&handle); if (verbose) printf (", inodes"); /* * Open the inode bitmap using the old buffer. Should release any changes. */ rc = rtems_rfs_bitmap_open (&bitmap, fs, &handle, group_size, group_base + RTEMS_RFS_GROUP_INODE_BITMAP_BLOCK); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); printf ("\nrtems-rfs: write-group: group %3d: open inode bitmap failed: %d: %s\n", group, rc, strerror (rc)); return false; } /* * Force the whole buffer to a known state. The bit map may not occupy the * whole block. */ memset (rtems_rfs_buffer_data (&handle), 0x00, rtems_rfs_fs_block_size (fs)); /* * Clear the inode bitmap. */ rc = rtems_rfs_bitmap_map_clear_all (&bitmap); if (rc > 0) { rtems_rfs_bitmap_close (&bitmap); rtems_rfs_buffer_handle_close (fs, &handle); printf ("\nrtems-rfs: write-group: group %3d: inode bitmap" \ " clear all failed: %d: %s\n", group, rc, strerror (rc)); return false; } /* * Close the inode bitmap. */ rc = rtems_rfs_bitmap_close (&bitmap); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); printf ("\nrtems-rfs: write-group: group %3d: close inode" \ " bitmap failed: %d: %s\n", group, rc, strerror (rc)); return false; } rtems_rfs_buffer_mark_dirty (&handle); /* * Initialise the inode tables if required to do so. */ if (initialise_inodes) { for (b = 0; b < blocks; b++) { rc = rtems_rfs_buffer_handle_request (fs, &handle, group_base + b + RTEMS_RFS_GROUP_INODE_BLOCK, false); if (rc > 0) { rtems_rfs_buffer_handle_close (fs, &handle); printf ("\nrtems-rfs: write-group: group %3d: block %" PRId32 " request failed: %d: %s\n", group, group_base + b + RTEMS_RFS_GROUP_INODE_BLOCK, rc, strerror (rc)); return false; } /* * Force the whole buffer to a known state. The bit map may not occupy the * whole block. */ memset (rtems_rfs_buffer_data (&handle), 0xff, rtems_rfs_fs_block_size (fs)); rtems_rfs_buffer_mark_dirty (&handle); } } rc = rtems_rfs_buffer_handle_close (fs, &handle); if (rc > 0) { printf ("\nrtems-rfs: write-group: buffer handle close failed: %d: %s\n", rc, strerror (rc)); return false; } return true; }