static int nova_traverse_dir_inode_log(struct super_block *sb,
struct nova_inode *pi, struct scan_bitmap *bm)
{
struct nova_inode_log_page *curr_page;
u64 curr_p;
u64 next;
curr_p = pi->log_head;
if (curr_p == 0) {
nova_err(sb, "Dir %llu log is NULL!\n", pi->nova_ino);
BUG();
}
nova_dbg_verbose("Log head 0x%llx, tail 0x%llx\n",
curr_p, pi->log_tail);
BUG_ON(curr_p & (PAGE_SIZE - 1));
set_bm(curr_p >> PAGE_SHIFT, bm, BM_4K);
curr_page = (struct nova_inode_log_page *)nova_get_block(sb, curr_p);
while ((next = curr_page->page_tail.next_page) != 0) {
curr_p = next;
BUG_ON(curr_p & (PAGE_SIZE - 1));
set_bm(curr_p >> PAGE_SHIFT, bm, BM_4K);
curr_page = (struct nova_inode_log_page *)
nova_get_block(sb, curr_p);
}
return 0;
}
inline int nova_replay_remove_dentry(struct super_block *sb,
struct nova_inode_info_header *sih,
struct nova_dentry *entry)
{
nova_dbg_verbose("%s: remove %s\n", __func__, entry->name);
nova_remove_dir_radix_tree(sb, sih, entry->name,
entry->name_len, 1);
return 0;
}
inline int nova_replay_add_dentry(struct super_block *sb,
struct nova_inode_info_header *sih, struct nova_dentry *entry)
{
if (!entry->name_len)
return -EINVAL;
nova_dbg_verbose("%s: add %s\n", __func__, entry->name);
return nova_insert_dir_radix_tree(sb, sih,
entry->name, entry->name_len, entry);
}
/* adds a directory entry pointing to the inode. assumes the inode has
* already been logged for consistency
*/
int nova_add_dentry(struct dentry *dentry, u64 ino, int inc_link,
u64 tail, u64 *new_tail)
{
struct inode *dir = dentry->d_parent->d_inode;
struct super_block *sb = dir->i_sb;
struct nova_inode_info *si = NOVA_I(dir);
struct nova_inode_info_header *sih = &si->header;
struct nova_inode *pidir;
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
struct nova_dentry *direntry;
unsigned short loglen;
int ret;
u64 curr_entry, curr_tail;
timing_t add_dentry_time;
nova_dbg_verbose("%s: dir %lu new inode %llu\n",
__func__, dir->i_ino, ino);
nova_dbg_verbose("%s: %s %d\n", __func__, name, namelen);
NOVA_START_TIMING(add_dentry_t, add_dentry_time);
if (namelen == 0)
return -EINVAL;
pidir = nova_get_inode(sb, dir);
/*
* XXX shouldn't update any times until successful
* completion of syscall, but too many callers depend
* on this.
*/
dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
loglen = NOVA_DIR_LOG_REC_LEN(namelen);
curr_entry = nova_append_dir_inode_entry(sb, pidir, dir, ino,
dentry, loglen, tail, inc_link,
&curr_tail);
direntry = (struct nova_dentry *)nova_get_block(sb, curr_entry);
ret = nova_insert_dir_radix_tree(sb, sih, name, namelen, direntry);
*new_tail = curr_tail;
NOVA_END_TIMING(add_dentry_t, add_dentry_time);
return ret;
}
/*
* Append a nova_dentry to the current nova_inode_log_page.
* Note unlike append_file_write_entry(), this method returns the tail pointer
* after append.
*/
static u64 nova_append_dir_inode_entry(struct super_block *sb,
struct nova_inode *pidir, struct inode *dir,
u64 ino, struct dentry *dentry, unsigned short de_len, u64 tail,
int link_change, u64 *curr_tail)
{
struct nova_inode_info *si = NOVA_I(dir);
struct nova_inode_info_header *sih = &si->header;
struct nova_dentry *entry;
u64 curr_p;
size_t size = de_len;
int extended = 0;
unsigned short links_count;
timing_t append_time;
NOVA_START_TIMING(append_dir_entry_t, append_time);
curr_p = nova_get_append_head(sb, pidir, sih, tail, size, &extended);
if (curr_p == 0)
BUG();
entry = (struct nova_dentry *)nova_get_block(sb, curr_p);
entry->entry_type = DIR_LOG;
entry->ino = cpu_to_le64(ino);
entry->name_len = dentry->d_name.len;
memcpy_to_pmem_nocache(entry->name, dentry->d_name.name,
dentry->d_name.len);
entry->name[dentry->d_name.len] = '\0';
entry->file_type = 0;
entry->invalid = 0;
entry->mtime = cpu_to_le32(dir->i_mtime.tv_sec);
entry->size = cpu_to_le64(dir->i_size);
links_count = cpu_to_le16(dir->i_nlink);
if (links_count == 0 && link_change == -1)
links_count = 0;
else
links_count += link_change;
entry->links_count = cpu_to_le16(links_count);
/* Update actual de_len */
entry->de_len = cpu_to_le16(de_len);
nova_dbg_verbose("dir entry @ 0x%llx: ino %llu, entry len %u, "
"name len %u, file type %u\n",
curr_p, entry->ino, entry->de_len,
entry->name_len, entry->file_type);
nova_flush_buffer(entry, de_len, 0);
*curr_tail = curr_p + de_len;
dir->i_blocks = pidir->i_blocks;
NOVA_END_TIMING(append_dir_entry_t, append_time);
return curr_p;
}
static loff_t nova_max_size(int bits)
{
loff_t res;
res = (1ULL << 63) - 1;
if (res > MAX_LFS_FILESIZE)
res = MAX_LFS_FILESIZE;
nova_dbg_verbose("max file size %llu bytes\n", res);
return res;
}
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;
}