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_init_inode_list_from_inode(struct super_block *sb)
{
struct nova_sb_info *sbi = NOVA_SB(sb);
struct nova_inode *pi = nova_get_inode_by_ino(sb, NOVA_INODELIST1_INO);
struct nova_range_node_lowhigh *entry;
struct nova_range_node *range_node;
struct inode_map *inode_map;
size_t size = sizeof(struct nova_range_node_lowhigh);
unsigned long num_inode_node = 0;
u64 curr_p;
unsigned long cpuid;
int ret;
sbi->s_inodes_used_count = 0;
curr_p = pi->log_head;
if (curr_p == 0) {
nova_dbg("%s: pi head is 0!\n", __func__);
return -EINVAL;
}
while (curr_p != pi->log_tail) {
if (is_last_entry(curr_p, size)) {
curr_p = next_log_page(sb, curr_p);
}
if (curr_p == 0) {
nova_dbg("%s: curr_p is NULL!\n", __func__);
NOVA_ASSERT(0);
}
entry = (struct nova_range_node_lowhigh *)nova_get_block(sb,
curr_p);
range_node = nova_alloc_inode_node(sb);
if (range_node == NULL)
NOVA_ASSERT(0);
cpuid = (entry->range_low & CPUID_MASK) >> 56;
if (cpuid >= sbi->cpus) {
nova_err(sb, "Invalid cpuid %lu\n", cpuid);
nova_free_inode_node(sb, range_node);
NOVA_ASSERT(0);
nova_destroy_inode_trees(sb);
goto out;
}
range_node->range_low = entry->range_low & ~CPUID_MASK;
range_node->range_high = entry->range_high;
ret = nova_insert_inodetree(sbi, range_node, cpuid);
if (ret) {
nova_err(sb, "%s failed, %d\n", __func__, cpuid);
nova_free_inode_node(sb, range_node);
NOVA_ASSERT(0);
nova_destroy_inode_trees(sb);
goto out;
}
sbi->s_inodes_used_count +=
range_node->range_high - range_node->range_low + 1;
num_inode_node++;
inode_map = &sbi->inode_maps[cpuid];
inode_map->num_range_node_inode++;
if (!inode_map->first_inode_range)
inode_map->first_inode_range = range_node;
curr_p += sizeof(struct nova_range_node_lowhigh);
}
nova_dbg("%s: %lu inode nodes\n", __func__, num_inode_node);
out:
nova_free_inode_log(sb, pi);
return ret;
}
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_init_blockmap_from_inode(struct super_block *sb)
{
struct nova_sb_info *sbi = NOVA_SB(sb);
struct nova_inode *pi = nova_get_inode_by_ino(sb, NOVA_BLOCKNODE_INO);
struct free_list *free_list;
struct nova_range_node_lowhigh *entry;
struct nova_range_node *blknode;
size_t size = sizeof(struct nova_range_node_lowhigh);
u64 curr_p;
u64 cpuid;
int ret = 0;
curr_p = pi->log_head;
if (curr_p == 0) {
nova_dbg("%s: pi head is 0!\n", __func__);
return -EINVAL;
}
while (curr_p != pi->log_tail) {
if (is_last_entry(curr_p, size)) {
curr_p = next_log_page(sb, curr_p);
}
if (curr_p == 0) {
nova_dbg("%s: curr_p is NULL!\n", __func__);
NOVA_ASSERT(0);
ret = -EINVAL;
break;
}
entry = (struct nova_range_node_lowhigh *)nova_get_block(sb,
curr_p);
blknode = nova_alloc_blocknode(sb);
if (blknode == NULL)
NOVA_ASSERT(0);
blknode->range_low = le64_to_cpu(entry->range_low);
blknode->range_high = le64_to_cpu(entry->range_high);
cpuid = get_cpuid(sbi, blknode->range_low);
/* FIXME: Assume NR_CPUS not change */
free_list = nova_get_free_list(sb, cpuid);
ret = nova_insert_blocktree(sbi,
&free_list->block_free_tree, blknode);
if (ret) {
nova_err(sb, "%s failed\n", __func__);
nova_free_blocknode(sb, blknode);
NOVA_ASSERT(0);
nova_destroy_blocknode_trees(sb);
goto out;
}
free_list->num_blocknode++;
if (free_list->num_blocknode == 1)
free_list->first_node = blknode;
free_list->num_free_blocks +=
blknode->range_high - blknode->range_low + 1;
curr_p += sizeof(struct nova_range_node_lowhigh);
}
out:
nova_free_inode_log(sb, pi);
return ret;
}
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;
}
