static int hfsplus_write_inode(struct inode *inode, struct writeback_control *wbc) { dprint(DBG_INODE, "hfsplus_write_inode: %lu\n", inode->i_ino); hfsplus_ext_write_extent(inode); if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || inode->i_ino == HFSPLUS_ROOT_CNID) return hfsplus_cat_write_inode(inode); else return hfsplus_system_write_inode(inode); }
int hfsplus_file_extend(struct inode *inode) { struct super_block *sb = inode->i_sb; u32 start, len, goal; int res; if (HFSPLUS_SB(sb).alloc_file->i_size * 8 < HFSPLUS_SB(sb).total_blocks - HFSPLUS_SB(sb).free_blocks + 8) { // extend alloc file printk("extend alloc file! (%Lu,%u,%u)\n", HFSPLUS_SB(sb).alloc_file->i_size * 8, HFSPLUS_SB(sb).total_blocks, HFSPLUS_SB(sb).free_blocks); return -ENOSPC; //BUG(); } down(&HFSPLUS_I(inode).extents_lock); if (HFSPLUS_I(inode).alloc_blocks == HFSPLUS_I(inode).first_blocks) goal = hfsplus_ext_lastblock(HFSPLUS_I(inode).first_extents); else { res = hfsplus_ext_read_extent(inode, HFSPLUS_I(inode).alloc_blocks); if (res) goto out; goal = hfsplus_ext_lastblock(HFSPLUS_I(inode).cached_extents); } len = HFSPLUS_I(inode).clump_blocks; start = hfsplus_block_allocate(sb, HFSPLUS_SB(sb).total_blocks, goal, &len); if (start >= HFSPLUS_SB(sb).total_blocks) { start = hfsplus_block_allocate(sb, goal, 0, &len); if (start >= goal) { res = -ENOSPC; goto out; } } dprint(DBG_EXTENT, "extend %lu: %u,%u\n", inode->i_ino, start, len); if (HFSPLUS_I(inode).alloc_blocks <= HFSPLUS_I(inode).first_blocks) { if (!HFSPLUS_I(inode).first_blocks) { dprint(DBG_EXTENT, "first extents\n"); /* no extents yet */ HFSPLUS_I(inode).first_extents[0].start_block = cpu_to_be32(start); HFSPLUS_I(inode).first_extents[0].block_count = cpu_to_be32(len); res = 0; } else { /* try to append to extents in inode */ res = hfsplus_add_extent(HFSPLUS_I(inode).first_extents, HFSPLUS_I(inode).alloc_blocks, start, len); if (res == -ENOSPC) goto insert_extent; } if (!res) { hfsplus_dump_extent(HFSPLUS_I(inode).first_extents); HFSPLUS_I(inode).first_blocks += len; } } else { res = hfsplus_add_extent(HFSPLUS_I(inode).cached_extents, HFSPLUS_I(inode).alloc_blocks - HFSPLUS_I(inode).cached_start, start, len); if (!res) { hfsplus_dump_extent(HFSPLUS_I(inode).cached_extents); HFSPLUS_I(inode).flags |= HFSPLUS_FLG_EXT_DIRTY; HFSPLUS_I(inode).cached_blocks += len; } else if (res == -ENOSPC) goto insert_extent; } out: up(&HFSPLUS_I(inode).extents_lock); if (!res) { HFSPLUS_I(inode).alloc_blocks += len; mark_inode_dirty(inode); } return res; insert_extent: dprint(DBG_EXTENT, "insert new extent\n"); hfsplus_ext_write_extent(inode); memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec)); HFSPLUS_I(inode).cached_extents[0].start_block = cpu_to_be32(start); HFSPLUS_I(inode).cached_extents[0].block_count = cpu_to_be32(len); hfsplus_dump_extent(HFSPLUS_I(inode).cached_extents); HFSPLUS_I(inode).flags |= HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW; HFSPLUS_I(inode).cached_start = HFSPLUS_I(inode).alloc_blocks; HFSPLUS_I(inode).cached_blocks = len; res = 0; goto out; }