static u64 nova_append_range_node_entry(struct super_block *sb, struct nova_range_node *curr, u64 tail, unsigned long cpuid) { u64 curr_p; size_t size = sizeof(struct nova_range_node_lowhigh); struct nova_range_node_lowhigh *entry; curr_p = tail; if (curr_p == 0 || (is_last_entry(curr_p, size) && next_log_page(sb, curr_p) == 0)) { nova_dbg("%s: inode log reaches end?\n", __func__); goto out; } if (is_last_entry(curr_p, size)) curr_p = next_log_page(sb, curr_p); entry = (struct nova_range_node_lowhigh *)nova_get_block(sb, curr_p); entry->range_low = cpu_to_le64(curr->range_low); if (cpuid) entry->range_low |= cpu_to_le64(cpuid << 56); entry->range_high = cpu_to_le64(curr->range_high); nova_dbgv("append entry block low 0x%lx, high 0x%lx\n", curr->range_low, curr->range_high); nova_flush_buffer(entry, sizeof(struct nova_range_node_lowhigh), 0); out: return curr_p; }
static int nova_insert_blocknode_map(struct super_block *sb, int cpuid, unsigned long low, unsigned long high) { struct nova_sb_info *sbi = NOVA_SB(sb); struct free_list *free_list; struct rb_root *tree; struct nova_range_node *blknode = NULL; unsigned long num_blocks = 0; int ret; num_blocks = high - low + 1; nova_dbgv("%s: cpu %d, low %lu, high %lu, num %lu\n", __func__, cpuid, low, high, num_blocks); free_list = nova_get_free_list(sb, cpuid); tree = &(free_list->block_free_tree); blknode = nova_alloc_blocknode(sb); if (blknode == NULL) return -ENOMEM; blknode->range_low = low; blknode->range_high = high; ret = nova_insert_blocktree(sbi, tree, blknode); if (ret) { nova_err(sb, "%s failed\n", __func__); nova_free_blocknode(sb, blknode); goto out; } if (!free_list->first_node) free_list->first_node = blknode; free_list->num_blocknode++; free_list->num_free_blocks += num_blocks; out: return ret; }
static int nova_insert_dir_radix_tree(struct super_block *sb, struct nova_inode_info_header *sih, const char *name, int namelen, struct nova_dentry *direntry) { unsigned long hash; int ret; hash = BKDRHash(name, namelen); nova_dbgv("%s: insert %s hash %lu\n", __func__, name, hash); /* FIXME: hash collision ignored here */ ret = radix_tree_insert(&sih->tree, hash, direntry); if (ret) nova_dbg("%s ERROR %d: %s\n", __func__, ret, name); return ret; }
int nova_rebuild_inode(struct super_block *sb, struct nova_inode_info *si, u64 pi_addr) { struct nova_inode_info_header *sih = &si->header; struct nova_inode *pi; unsigned long nova_ino; pi = (struct nova_inode *)nova_get_block(sb, pi_addr); if (!pi) NOVA_ASSERT(0); if (pi->valid == 0) return -EINVAL; nova_ino = pi->nova_ino; nova_dbgv("%s: inode %lu, addr 0x%llx, valid %d, " "head 0x%llx, tail 0x%llx\n", __func__, nova_ino, pi_addr, pi->valid, pi->log_head, pi->log_tail); nova_init_header(sb, sih, __le16_to_cpu(pi->i_mode)); sih->ino = nova_ino; switch (__le16_to_cpu(pi->i_mode) & S_IFMT) { case S_IFLNK: /* Treat symlink files as normal files */ /* Fall through */ case S_IFREG: nova_rebuild_file_inode_tree(sb, pi, pi_addr, sih); break; case S_IFDIR: nova_rebuild_dir_inode_tree(sb, pi, pi_addr, sih); break; default: /* In case of special inode, walk the log */ if (pi->log_head) nova_rebuild_file_inode_tree(sb, pi, pi_addr, sih); sih->pi_addr = pi_addr; break; } return 0; }
void nova_save_blocknode_mappings_to_log(struct super_block *sb) { struct nova_inode *pi = nova_get_inode_by_ino(sb, NOVA_BLOCKNODE_INO); struct nova_sb_info *sbi = NOVA_SB(sb); struct nova_super_block *super; struct free_list *free_list; unsigned long num_blocknode = 0; unsigned long num_pages; int allocated; u64 new_block = 0; u64 temp_tail; int i; /* Allocate log pages before save blocknode mappings */ for (i = 0; i < sbi->cpus; i++) { free_list = nova_get_free_list(sb, i); num_blocknode += free_list->num_blocknode; nova_dbgv("%s: free list %d: %lu nodes\n", __func__, i, free_list->num_blocknode); } free_list = nova_get_free_list(sb, SHARED_CPU); num_blocknode += free_list->num_blocknode; nova_dbgv("%s: shared list: %lu nodes\n", __func__, free_list->num_blocknode); num_pages = num_blocknode / RANGENODE_PER_PAGE; if (num_blocknode % RANGENODE_PER_PAGE) num_pages++; allocated = nova_allocate_inode_log_pages(sb, pi, num_pages, &new_block); if (allocated != num_pages) { nova_dbg("Error saving blocknode mappings: %d\n", allocated); return; } /* * save the total allocated blocknode mappings * in super block * No transaction is needed as we will recover the fields * via failure recovery */ super = nova_get_super(sb); nova_memunlock_range(sb, &super->s_wtime, NOVA_FAST_MOUNT_FIELD_SIZE); super->s_wtime = cpu_to_le32(get_seconds()); nova_memlock_range(sb, &super->s_wtime, NOVA_FAST_MOUNT_FIELD_SIZE); nova_flush_buffer(super, NOVA_SB_SIZE, 0); /* Finally update log head and tail */ pi->log_head = new_block; nova_flush_buffer(&pi->log_head, CACHELINE_SIZE, 0); temp_tail = new_block; for (i = 0; i < sbi->cpus; i++) { temp_tail = nova_save_free_list_blocknodes(sb, i, temp_tail); } temp_tail = nova_save_free_list_blocknodes(sb, SHARED_CPU, temp_tail); nova_update_tail(pi, temp_tail); nova_dbg("%s: %lu blocknodes, %lu log pages, pi head 0x%llx, " "tail 0x%llx\n", __func__, num_blocknode, num_pages, pi->log_head, pi->log_tail); }
static int nova_readdir(struct file *file, struct dir_context *ctx) { struct inode *inode = file_inode(file); struct super_block *sb = inode->i_sb; struct nova_inode *pidir; struct nova_inode_info *si = NOVA_I(inode); struct nova_inode_info_header *sih = &si->header; struct nova_inode *child_pi; struct nova_inode *prev_child_pi = NULL; struct nova_dentry *entry = NULL; struct nova_dentry *prev_entry = NULL; unsigned short de_len; u64 pi_addr; unsigned long pos = 0; ino_t ino; void *addr; u64 curr_p; u8 type; int ret; timing_t readdir_time; NOVA_START_TIMING(readdir_t, readdir_time); pidir = nova_get_inode(sb, inode); nova_dbgv("%s: ino %llu, size %llu, pos 0x%llx\n", __func__, (u64)inode->i_ino, pidir->i_size, ctx->pos); if (pidir->log_head == 0) { nova_err(sb, "Dir %lu log is NULL!\n", inode->i_ino); BUG(); return -EINVAL; } pos = ctx->pos; if (pos == 0) { curr_p = pidir->log_head; } else if (pos == READDIR_END) { goto out; } else { curr_p = nova_find_next_dentry_addr(sb, sih, pos); if (curr_p == 0) goto out; } while (curr_p != pidir->log_tail) { if (goto_next_page(sb, curr_p)) { curr_p = next_log_page(sb, curr_p); } if (curr_p == 0) { nova_err(sb, "Dir %lu log is NULL!\n", inode->i_ino); BUG(); return -EINVAL; } addr = (void *)nova_get_block(sb, curr_p); type = nova_get_entry_type(addr); switch (type) { case SET_ATTR: curr_p += sizeof(struct nova_setattr_logentry); continue; case LINK_CHANGE: curr_p += sizeof(struct nova_link_change_entry); continue; case DIR_LOG: break; default: nova_dbg("%s: unknown type %d, 0x%llx\n", __func__, type, curr_p); BUG(); return -EINVAL; } entry = (struct nova_dentry *)nova_get_block(sb, curr_p); nova_dbgv("curr_p: 0x%llx, type %d, ino %llu, " "name %s, namelen %u, rec len %u\n", curr_p, entry->entry_type, le64_to_cpu(entry->ino), entry->name, entry->name_len, le16_to_cpu(entry->de_len)); de_len = le16_to_cpu(entry->de_len); if (entry->ino > 0 && entry->invalid == 0) { ino = __le64_to_cpu(entry->ino); pos = BKDRHash(entry->name, entry->name_len); ret = nova_get_inode_address(sb, ino, &pi_addr, 0); if (ret) { nova_dbg("%s: get child inode %lu address " "failed %d\n", __func__, ino, ret); ctx->pos = READDIR_END; return ret; } child_pi = nova_get_block(sb, pi_addr); nova_dbgv("ctx: ino %llu, name %s, " "name_len %u, de_len %u\n", (u64)ino, entry->name, entry->name_len, entry->de_len); if (prev_entry && !dir_emit(ctx, prev_entry->name, prev_entry->name_len, ino, IF2DT(le16_to_cpu(prev_child_pi->i_mode)))) { nova_dbgv("Here: pos %llu\n", ctx->pos); return 0; } prev_entry = entry; prev_child_pi = child_pi; } ctx->pos = pos; curr_p += de_len; } if (prev_entry && !dir_emit(ctx, prev_entry->name, prev_entry->name_len, ino, IF2DT(le16_to_cpu(prev_child_pi->i_mode)))) return 0; ctx->pos = READDIR_END; out: NOVA_END_TIMING(readdir_t, readdir_time); nova_dbgv("%s return\n", __func__); return 0; }
static int nova_readdir(struct file *file, struct dir_context *ctx) { struct inode *inode = file_inode(file); struct super_block *sb = inode->i_sb; struct nova_inode *pidir; struct nova_inode_info *si = NOVA_I(inode); struct nova_inode_info_header *sih = &si->header; struct nova_inode *child_pi; struct nova_dentry *entry; struct nova_dentry *entries[FREE_BATCH]; int nr_entries; u64 pi_addr; unsigned long pos = 0; ino_t ino; int i; int ret; timing_t readdir_time; NOVA_START_TIMING(readdir_t, readdir_time); pidir = nova_get_inode(sb, inode); nova_dbgv("%s: ino %llu, size %llu, pos %llu\n", __func__, (u64)inode->i_ino, pidir->i_size, ctx->pos); if (!sih) { nova_dbg("%s: inode %lu sih does not exist!\n", __func__, inode->i_ino); ctx->pos = READDIR_END; return 0; } pos = ctx->pos; if (pos == READDIR_END) goto out; do { nr_entries = radix_tree_gang_lookup(&sih->tree, (void **)entries, pos, FREE_BATCH); for (i = 0; i < nr_entries; i++) { entry = entries[i]; pos = BKDRHash(entry->name, entry->name_len); ino = __le64_to_cpu(entry->ino); if (ino == 0) continue; ret = nova_get_inode_address(sb, ino, &pi_addr, 0); if (ret) { nova_dbg("%s: get child inode %lu address " "failed %d\n", __func__, ino, ret); ctx->pos = READDIR_END; return ret; } child_pi = nova_get_block(sb, pi_addr); nova_dbgv("ctx: ino %llu, name %s, " "name_len %u, de_len %u\n", (u64)ino, entry->name, entry->name_len, entry->de_len); if (!dir_emit(ctx, entry->name, entry->name_len, ino, IF2DT(le16_to_cpu(child_pi->i_mode)))) { nova_dbgv("Here: pos %llu\n", ctx->pos); return 0; } ctx->pos = pos + 1; } pos++; } while (nr_entries == FREE_BATCH); out: NOVA_END_TIMING(readdir_t, readdir_time); return 0; }
int nova_rebuild_dir_inode_tree(struct super_block *sb, struct nova_inode *pi, u64 pi_addr, struct nova_inode_info_header *sih) { struct nova_dentry *entry = NULL; struct nova_setattr_logentry *attr_entry = NULL; struct nova_link_change_entry *link_change_entry = NULL; struct nova_inode_log_page *curr_page; u64 ino = pi->nova_ino; unsigned short de_len; timing_t rebuild_time; void *addr; u64 curr_p; u64 next; u8 type; int ret; NOVA_START_TIMING(rebuild_dir_t, rebuild_time); nova_dbg_verbose("Rebuild dir %llu tree\n", ino); sih->pi_addr = pi_addr; curr_p = pi->log_head; if (curr_p == 0) { nova_err(sb, "Dir %llu log is NULL!\n", ino); BUG(); } nova_dbg_verbose("Log head 0x%llx, tail 0x%llx\n", curr_p, pi->log_tail); sih->log_pages = 1; while (curr_p != pi->log_tail) { if (goto_next_page(sb, curr_p)) { sih->log_pages++; curr_p = next_log_page(sb, curr_p); } if (curr_p == 0) { nova_err(sb, "Dir %llu log is NULL!\n", ino); BUG(); } addr = (void *)nova_get_block(sb, curr_p); type = nova_get_entry_type(addr); switch (type) { case SET_ATTR: attr_entry = (struct nova_setattr_logentry *)addr; nova_apply_setattr_entry(sb, pi, sih, attr_entry); sih->last_setattr = curr_p; curr_p += sizeof(struct nova_setattr_logentry); continue; case LINK_CHANGE: link_change_entry = (struct nova_link_change_entry *)addr; nova_apply_link_change_entry(pi, link_change_entry); sih->last_link_change = curr_p; curr_p += sizeof(struct nova_link_change_entry); continue; case DIR_LOG: break; default: nova_dbg("%s: unknown type %d, 0x%llx\n", __func__, type, curr_p); NOVA_ASSERT(0); } entry = (struct nova_dentry *)nova_get_block(sb, curr_p); nova_dbgv("curr_p: 0x%llx, type %d, ino %llu, " "name %s, namelen %u, rec len %u\n", curr_p, entry->entry_type, le64_to_cpu(entry->ino), entry->name, entry->name_len, le16_to_cpu(entry->de_len)); if (entry->ino > 0) { if (entry->invalid == 0) { /* A valid entry to add */ ret = nova_replay_add_dentry(sb, sih, entry); } } else { /* Delete the entry */ ret = nova_replay_remove_dentry(sb, sih, entry); } if (ret) { nova_err(sb, "%s ERROR %d\n", __func__, ret); break; } nova_rebuild_dir_time_and_size(sb, pi, entry); de_len = le16_to_cpu(entry->de_len); curr_p += de_len; } sih->i_size = le64_to_cpu(pi->i_size); sih->i_mode = le64_to_cpu(pi->i_mode); nova_flush_buffer(pi, sizeof(struct nova_inode), 0); /* Keep traversing until log ends */ curr_p &= PAGE_MASK; curr_page = (struct nova_inode_log_page *)nova_get_block(sb, curr_p); while ((next = curr_page->page_tail.next_page) != 0) { sih->log_pages++; curr_p = next; curr_page = (struct nova_inode_log_page *) nova_get_block(sb, curr_p); } pi->i_blocks = sih->log_pages; // nova_print_dir_tree(sb, sih, ino); NOVA_END_TIMING(rebuild_dir_t, rebuild_time); return 0; }