/* * This function creates a journal using direct I/O routines. */ static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino, blk_t num_blocks, blk64_t goal, int flags) { char *buf; errcode_t retval; struct ext2_inode inode; unsigned long long inode_size; struct mkjournal_struct es; if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags, &buf))) return retval; if ((retval = ext2fs_read_bitmaps(fs))) goto out2; if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) goto out2; if (inode.i_blocks > 0) { retval = EEXIST; goto out2; } es.num_blocks = num_blocks; es.newblocks = 0; es.buf = buf; es.err = 0; es.flags = flags; es.zero_count = 0; es.goal = (goal != ~0ULL) ? goal : get_midpoint_journal_block(fs); if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) { inode.i_flags |= EXT4_EXTENTS_FL; if ((retval = ext2fs_write_inode(fs, journal_ino, &inode))) goto out2; } retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND, 0, mkjournal_proc, &es); if (retval) goto out2; if (es.err) { retval = es.err; goto out2; } if (es.zero_count) { retval = ext2fs_zero_blocks2(fs, es.blk_to_zero, es.zero_count, 0, 0); if (retval) goto out2; } if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) goto out2; inode_size = (unsigned long long)fs->blocksize * num_blocks; ext2fs_iblk_add_blocks(fs, &inode, es.newblocks); inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0); inode.i_links_count = 1; inode.i_mode = LINUX_S_IFREG | 0600; retval = ext2fs_inode_size_set(fs, &inode, inode_size); if (retval) goto out2; if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode))) goto out2; retval = 0; memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4); fs->super->s_jnl_blocks[15] = inode.i_size_high; fs->super->s_jnl_blocks[16] = inode.i_size; fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; ext2fs_mark_super_dirty(fs); out2: ext2fs_free_mem(&buf); return retval; }
/* * This function creates a journal using direct I/O routines. */ static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino, blk_t num_blocks, blk64_t goal, int flags) { char *buf; errcode_t retval; struct ext2_inode inode; unsigned long long inode_size; int falloc_flags = EXT2_FALLOCATE_FORCE_INIT; blk64_t zblk; if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags, &buf))) return retval; if ((retval = ext2fs_read_bitmaps(fs))) goto out2; if ((retval = ext2fs_read_inode(fs, journal_ino, &inode))) goto out2; if (inode.i_blocks > 0) { retval = EEXIST; goto out2; } if (goal == ~0ULL) goal = get_midpoint_journal_block(fs); if (ext2fs_has_feature_extents(fs->super)) inode.i_flags |= EXT4_EXTENTS_FL; if (!(flags & EXT2_MKJOURNAL_LAZYINIT)) falloc_flags |= EXT2_FALLOCATE_ZERO_BLOCKS; inode_size = (unsigned long long)fs->blocksize * num_blocks; inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0); inode.i_links_count = 1; inode.i_mode = LINUX_S_IFREG | 0600; retval = ext2fs_inode_size_set(fs, &inode, inode_size); if (retval) goto out2; retval = ext2fs_fallocate(fs, falloc_flags, journal_ino, &inode, goal, 0, num_blocks); if (retval) goto out2; if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode))) goto out2; retval = ext2fs_bmap2(fs, journal_ino, &inode, NULL, 0, 0, NULL, &zblk); if (retval) goto out2; retval = io_channel_write_blk64(fs->io, zblk, 1, buf); if (retval) goto out2; memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4); fs->super->s_jnl_blocks[15] = inode.i_size_high; fs->super->s_jnl_blocks[16] = inode.i_size; fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS; ext2fs_mark_super_dirty(fs); out2: ext2fs_free_mem(&buf); return retval; }