static struct inode *f2fs_nfs_get_inode(struct super_block *sb,
u64 ino, u32 generation)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode;
if (unlikely(ino < F2FS_ROOT_INO(sbi)))
return ERR_PTR(-ESTALE);
if (unlikely(ino >= NM_I(sbi)->max_nid))
return ERR_PTR(-ESTALE);
/*
* f2fs_iget isn't quite right if the inode is currently unallocated!
* However f2fs_iget currently does appropriate checks to handle stale
* inodes so everything is OK.
*/
inode = f2fs_iget(sb, ino);
if (IS_ERR(inode))
return ERR_CAST(inode);
if (unlikely(generation && inode->i_generation != generation)) {
/* we didn't find the right inode.. */
iput(inode);
return ERR_PTR(-ESTALE);
}
return inode;
}
static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
{
if (struct_type == GC_THREAD)
return (unsigned char *)sbi->gc_thread;
else if (struct_type == SM_INFO)
return (unsigned char *)SM_I(sbi);
else if (struct_type == NM_INFO)
return (unsigned char *)NM_I(sbi);
else if (struct_type == F2FS_SBI)
return (unsigned char *)sbi;
return NULL;
}
static unsigned char *__struct_ptr(struct f2fs_sb_info *sbi, int struct_type)
{
if (struct_type == GC_THREAD)
return (unsigned char *)sbi->gc_thread;
else if (struct_type == SM_INFO)
return (unsigned char *)SM_I(sbi);
else if (struct_type == DCC_INFO)
return (unsigned char *)SM_I(sbi)->dcc_info;
else if (struct_type == NM_INFO)
return (unsigned char *)NM_I(sbi);
else if (struct_type == F2FS_SBI || struct_type == RESERVED_BLOCKS)
return (unsigned char *)sbi;
#ifdef CONFIG_F2FS_FAULT_INJECTION
else if (struct_type == FAULT_INFO_RATE ||
struct_type == FAULT_INFO_TYPE)
return (unsigned char *)&sbi->fault_info;
#endif
return NULL;
}
void f2fs_alloc_nid(struct f2fs_sb_info *sbi, nid_t *nid, int inode)
{
struct f2fs_nm_info *nm_i = NM_I(sbi);
struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
nid_t i, inode_cnt, node_cnt;
for (i = 0; i < nm_i->max_nid; i++)
if(f2fs_test_bit(i, nm_i->nid_bitmap) == 0)
break;
ASSERT(i < nm_i->max_nid);
f2fs_set_bit(i, nm_i->nid_bitmap);
*nid = i;
inode_cnt = get_cp(valid_inode_count);
node_cnt = get_cp(valid_node_count);
if (inode)
set_cp(valid_inode_count, inode_cnt + 1);
set_cp(valid_node_count, node_cnt + 1);
}
static unsigned long __count_free_nids(struct f2fs_sb_info *sbi)
{
if (NM_I(sbi)->fcnt > NAT_ENTRY_PER_BLOCK)
return NM_I(sbi)->fcnt - NAT_ENTRY_PER_BLOCK;
return 0;
}
static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi)
{
return NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt;
}
static unsigned long __count_free_nids(struct f2fs_sb_info *sbi)
{
long count = NM_I(sbi)->nid_cnt[FREE_NID] - MAX_FREE_NIDS;
return count > 0 ? count : 0;
}
static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi)
{
long count = NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt;
return count > 0 ? count : 0;
}
static unsigned long __count_free_nids(struct f2fs_sb_info *sbi)
{
if (NM_I(sbi)->fcnt > MAX_FREE_NIDS)
return NM_I(sbi)->fcnt - MAX_FREE_NIDS;
return 0;
}
int dump_info_from_blkaddr(struct f2fs_sb_info *sbi, u32 blk_addr)
{
nid_t nid;
int type;
struct f2fs_summary sum_entry;
struct node_info ni, ino_ni;
int ret = 0;
MSG(0, "\n== Dump data from block address ==\n\n");
if (blk_addr < SM_I(sbi)->seg0_blkaddr) {
MSG(0, "\nFS Reserved Area for SEG #0: ");
ret = -EINVAL;
} else if (blk_addr < SIT_I(sbi)->sit_base_addr) {
MSG(0, "\nFS Metadata Area: ");
ret = -EINVAL;
} else if (blk_addr < NM_I(sbi)->nat_blkaddr) {
MSG(0, "\nFS SIT Area: ");
ret = -EINVAL;
} else if (blk_addr < SM_I(sbi)->ssa_blkaddr) {
MSG(0, "\nFS NAT Area: ");
ret = -EINVAL;
} else if (blk_addr < SM_I(sbi)->main_blkaddr) {
MSG(0, "\nFS SSA Area: ");
ret = -EINVAL;
} else if (blk_addr > __end_block_addr(sbi)) {
MSG(0, "\nOut of address space: ");
ret = -EINVAL;
}
if (ret) {
MSG(0, "User data is from 0x%x to 0x%x\n\n",
SM_I(sbi)->main_blkaddr,
__end_block_addr(sbi));
return ret;
}
type = get_sum_entry(sbi, blk_addr, &sum_entry);
nid = le32_to_cpu(sum_entry.nid);
get_node_info(sbi, nid, &ni);
DBG(1, "Note: blkaddr = main_blkaddr + segno * 512 + offset\n");
DBG(1, "Block_addr [0x%x]\n", blk_addr);
DBG(1, " - Segno [0x%x]\n", GET_SEGNO(sbi, blk_addr));
DBG(1, " - Offset [0x%x]\n", OFFSET_IN_SEG(sbi, blk_addr));
DBG(1, "SUM.nid [0x%x]\n", nid);
DBG(1, "SUM.type [%s]\n", seg_type_name[type]);
DBG(1, "SUM.version [%d]\n", sum_entry.version);
DBG(1, "SUM.ofs_in_node [0x%x]\n", sum_entry.ofs_in_node);
DBG(1, "NAT.blkaddr [0x%x]\n", ni.blk_addr);
DBG(1, "NAT.ino [0x%x]\n", ni.ino);
get_node_info(sbi, ni.ino, &ino_ni);
/* inode block address */
if (ni.blk_addr == NULL_ADDR || ino_ni.blk_addr == NULL_ADDR) {
MSG(0, "FS Userdata Area: Obsolete block from 0x%x\n",
blk_addr);
return -EINVAL;
}
/* print inode */
if (config.dbg_lv > 0)
dump_node_from_blkaddr(ino_ni.blk_addr);
if (type == SEG_TYPE_CUR_DATA || type == SEG_TYPE_DATA) {
MSG(0, "FS Userdata Area: Data block from 0x%x\n", blk_addr);
MSG(0, " - Direct node block : id = 0x%x from 0x%x\n",
nid, ni.blk_addr);
MSG(0, " - Inode block : id = 0x%x from 0x%x\n",
ni.ino, ino_ni.blk_addr);
dump_node_from_blkaddr(ino_ni.blk_addr);
dump_data_offset(ni.blk_addr,
le16_to_cpu(sum_entry.ofs_in_node));
} else {
MSG(0, "FS Userdata Area: Node block from 0x%x\n", blk_addr);
if (ni.ino == ni.nid) {
MSG(0, " - Inode block : id = 0x%x from 0x%x\n",
ni.ino, ino_ni.blk_addr);
dump_node_from_blkaddr(ino_ni.blk_addr);
} else {
MSG(0, " - Node block : id = 0x%x from 0x%x\n",
nid, ni.blk_addr);
MSG(0, " - Inode block : id = 0x%x from 0x%x\n",
ni.ino, ino_ni.blk_addr);
dump_node_from_blkaddr(ino_ni.blk_addr);
dump_node_offset(ni.blk_addr);
}
}
return 0;
}