/**
* nilfs_cpfile_read - read or get cpfile inode
* @sb: super block instance
* @cpsize: size of a checkpoint entry
* @raw_inode: on-disk cpfile inode
* @inodep: buffer to store the inode
*/
int nilfs_cpfile_read(struct super_block *sb, size_t cpsize,
struct nilfs_inode *raw_inode, struct inode **inodep)
{
struct inode *cpfile;
int err;
cpfile = nilfs_iget_locked(sb, NULL, NILFS_CPFILE_INO);
if (unlikely(!cpfile))
return -ENOMEM;
if (!(cpfile->i_state & I_NEW))
goto out;
err = nilfs_mdt_init(cpfile, NILFS_MDT_GFP, 0);
if (err)
goto failed;
nilfs_mdt_set_entry_size(cpfile, cpsize,
sizeof(struct nilfs_cpfile_header));
err = nilfs_read_inode_common(cpfile, raw_inode);
if (err)
goto failed;
unlock_new_inode(cpfile);
out:
*inodep = cpfile;
return 0;
failed:
iget_failed(cpfile);
return err;
}
int nilfs_attach_checkpoint(struct nilfs_sb_info *sbi, __u64 cno)
{
struct the_nilfs *nilfs = sbi->s_nilfs;
struct nilfs_checkpoint *raw_cp;
struct buffer_head *bh_cp;
int err;
down_write(&nilfs->ns_sem);
list_add(&sbi->s_list, &nilfs->ns_supers);
up_write(&nilfs->ns_sem);
sbi->s_ifile = nilfs_mdt_new(
nilfs, sbi->s_super, NILFS_IFILE_INO, NILFS_IFILE_GFP);
if (!sbi->s_ifile)
return -ENOMEM;
err = nilfs_palloc_init_blockgroup(sbi->s_ifile, nilfs->ns_inode_size);
if (unlikely(err))
goto failed;
err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, cno, 0, &raw_cp,
&bh_cp);
if (unlikely(err)) {
if (err == -ENOENT || err == -EINVAL) {
printk(KERN_ERR
"NILFS: Invalid checkpoint "
"(checkpoint number=%llu)\n",
(unsigned long long)cno);
err = -EINVAL;
}
goto failed;
}
err = nilfs_read_inode_common(sbi->s_ifile, &raw_cp->cp_ifile_inode);
if (unlikely(err))
goto failed_bh;
atomic_set(&sbi->s_inodes_count, le64_to_cpu(raw_cp->cp_inodes_count));
atomic_set(&sbi->s_blocks_count, le64_to_cpu(raw_cp->cp_blocks_count));
nilfs_debug(2, "attached ifile (checkpoint number=%llu)\n",
(unsigned long long)cno);
nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, cno, bh_cp);
return 0;
failed_bh:
nilfs_cpfile_put_checkpoint(nilfs->ns_cpfile, cno, bh_cp);
failed:
nilfs_debug(1, "failed to attach ifile "
"(checkpoint number=%llu, err=%d)\n",
(unsigned long long)cno, err);
nilfs_mdt_destroy(sbi->s_ifile);
sbi->s_ifile = NULL;
down_write(&nilfs->ns_sem);
list_del_init(&sbi->s_list);
up_write(&nilfs->ns_sem);
return err;
}
static int __nilfs_read_inode(struct super_block *sb,
struct nilfs_root *root, unsigned long ino,
struct inode *inode)
{
struct the_nilfs *nilfs = sb->s_fs_info;
struct buffer_head *bh;
struct nilfs_inode *raw_inode;
int err;
down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
err = nilfs_ifile_get_inode_block(root->ifile, ino, &bh);
if (unlikely(err))
goto bad_inode;
raw_inode = nilfs_ifile_map_inode(root->ifile, ino, bh);
err = nilfs_read_inode_common(inode, raw_inode);
if (err)
goto failed_unmap;
if (S_ISREG(inode->i_mode)) {
inode->i_op = &nilfs_file_inode_operations;
inode->i_fop = &nilfs_file_operations;
inode->i_mapping->a_ops = &nilfs_aops;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &nilfs_dir_inode_operations;
inode->i_fop = &nilfs_dir_operations;
inode->i_mapping->a_ops = &nilfs_aops;
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &nilfs_symlink_inode_operations;
inode_nohighmem(inode);
inode->i_mapping->a_ops = &nilfs_aops;
} else {
inode->i_op = &nilfs_special_inode_operations;
init_special_inode(
inode, inode->i_mode,
huge_decode_dev(le64_to_cpu(raw_inode->i_device_code)));
}
nilfs_ifile_unmap_inode(root->ifile, ino, bh);
brelse(bh);
up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
nilfs_set_inode_flags(inode);
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS));
return 0;
failed_unmap:
nilfs_ifile_unmap_inode(root->ifile, ino, bh);
brelse(bh);
bad_inode:
up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
return err;
}
static int __nilfs_read_inode(struct super_block *sb, unsigned long ino,
struct inode *inode)
{
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct inode *dat = nilfs_dat_inode(sbi->s_nilfs);
struct buffer_head *bh;
struct nilfs_inode *raw_inode;
int err;
down_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
err = nilfs_ifile_get_inode_block(sbi->s_ifile, ino, &bh);
if (unlikely(err))
goto bad_inode;
raw_inode = nilfs_ifile_map_inode(sbi->s_ifile, ino, bh);
#ifdef CONFIG_NILFS_FS_POSIX_ACL
ii->i_acl = NILFS_ACL_NOT_CACHED;
ii->i_default_acl = NILFS_ACL_NOT_CACHED;
#endif
if (nilfs_read_inode_common(inode, raw_inode))
goto failed_unmap;
if (S_ISREG(inode->i_mode)) {
inode->i_op = &nilfs_file_inode_operations;
inode->i_fop = &nilfs_file_operations;
inode->i_mapping->a_ops = &nilfs_aops;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &nilfs_dir_inode_operations;
inode->i_fop = &nilfs_dir_operations;
inode->i_mapping->a_ops = &nilfs_aops;
} else if (S_ISLNK(inode->i_mode)) {
inode->i_op = &nilfs_symlink_inode_operations;
inode->i_mapping->a_ops = &nilfs_aops;
} else {
inode->i_op = &nilfs_special_inode_operations;
init_special_inode(
inode, inode->i_mode,
new_decode_dev(le64_to_cpu(raw_inode->i_device_code)));
}
nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh);
brelse(bh);
up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
nilfs_set_inode_flags(inode);
return 0;
failed_unmap:
nilfs_ifile_unmap_inode(sbi->s_ifile, ino, bh);
brelse(bh);
bad_inode:
up_read(&NILFS_MDT(dat)->mi_sem); /* XXX */
return err;
}
/**
* nilfs_dat_read - read or get dat inode
* @sb: super block instance
* @entry_size: size of a dat entry
* @raw_inode: on-disk dat inode
* @inodep: buffer to store the inode
*/
int nilfs_dat_read(struct super_block *sb, size_t entry_size,
struct nilfs_inode *raw_inode, struct inode **inodep)
{
static struct lock_class_key dat_lock_key;
struct inode *dat;
struct nilfs_dat_info *di;
int err;
if (entry_size > sb->s_blocksize) {
printk(KERN_ERR
"NILFS: too large DAT entry size: %zu bytes.\n",
entry_size);
return -EINVAL;
} else if (entry_size < NILFS_MIN_DAT_ENTRY_SIZE) {
printk(KERN_ERR
"NILFS: too small DAT entry size: %zu bytes.\n",
entry_size);
return -EINVAL;
}
dat = nilfs_iget_locked(sb, NULL, NILFS_DAT_INO);
if (unlikely(!dat))
return -ENOMEM;
if (!(dat->i_state & I_NEW))
goto out;
err = nilfs_mdt_init(dat, NILFS_MDT_GFP, sizeof(*di));
if (err)
goto failed;
err = nilfs_palloc_init_blockgroup(dat, entry_size);
if (err)
goto failed;
di = NILFS_DAT_I(dat);
lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
nilfs_palloc_setup_cache(dat, &di->palloc_cache);
nilfs_mdt_setup_shadow_map(dat, &di->shadow);
err = nilfs_read_inode_common(dat, raw_inode);
if (err)
goto failed;
unlock_new_inode(dat);
out:
*inodep = dat;
return 0;
failed:
iget_failed(dat);
return err;
}
int nilfs_sufile_read(struct super_block *sb, size_t susize,
struct nilfs_inode *raw_inode, struct inode **inodep)
{
struct inode *sufile;
struct nilfs_sufile_info *sui;
struct buffer_head *header_bh;
struct nilfs_sufile_header *header;
void *kaddr;
int err;
sufile = nilfs_iget_locked(sb, NULL, NILFS_SUFILE_INO);
if (unlikely(!sufile))
return -ENOMEM;
if (!(sufile->i_state & I_NEW))
goto out;
err = nilfs_mdt_init(sufile, NILFS_MDT_GFP, sizeof(*sui));
if (err)
goto failed;
nilfs_mdt_set_entry_size(sufile, susize,
sizeof(struct nilfs_sufile_header));
err = nilfs_read_inode_common(sufile, raw_inode);
if (err)
goto failed;
err = nilfs_sufile_get_header_block(sufile, &header_bh);
if (err)
goto failed;
sui = NILFS_SUI(sufile);
kaddr = kmap_atomic(header_bh->b_page);
header = kaddr + bh_offset(header_bh);
sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
kunmap_atomic(kaddr);
brelse(header_bh);
sui->allocmax = nilfs_sufile_get_nsegments(sufile) - 1;
sui->allocmin = 0;
unlock_new_inode(sufile);
out:
*inodep = sufile;
return 0;
failed:
iget_failed(sufile);
return err;
}
/**
* nilfs_cpfile_read - read or get cpfile inode
* @sb: super block instance
* @cpsize: size of a checkpoint entry
* @raw_inode: on-disk cpfile inode
* @inodep: buffer to store the inode
*/
int nilfs_cpfile_read(struct super_block *sb, size_t cpsize,
struct nilfs_inode *raw_inode, struct inode **inodep)
{
struct inode *cpfile;
int err;
if (cpsize > sb->s_blocksize) {
printk(KERN_ERR
"NILFS: too large checkpoint size: %zu bytes.\n",
cpsize);
return -EINVAL;
} else if (cpsize < NILFS_MIN_CHECKPOINT_SIZE) {
printk(KERN_ERR
"NILFS: too small checkpoint size: %zu bytes.\n",
cpsize);
return -EINVAL;
}
cpfile = nilfs_iget_locked(sb, NULL, NILFS_CPFILE_INO);
if (unlikely(!cpfile))
return -ENOMEM;
if (!(cpfile->i_state & I_NEW))
goto out;
err = nilfs_mdt_init(cpfile, NILFS_MDT_GFP, 0);
if (err)
goto failed;
nilfs_mdt_set_entry_size(cpfile, cpsize,
sizeof(struct nilfs_cpfile_header));
err = nilfs_read_inode_common(cpfile, raw_inode);
if (err)
goto failed;
unlock_new_inode(cpfile);
out:
*inodep = cpfile;
return 0;
failed:
iget_failed(cpfile);
return err;
}
int nilfs_sufile_read(struct inode *sufile, struct nilfs_inode *raw_inode)
{
struct nilfs_sufile_info *sui = NILFS_SUI(sufile);
struct buffer_head *header_bh;
struct nilfs_sufile_header *header;
void *kaddr;
int ret;
ret = nilfs_read_inode_common(sufile, raw_inode);
if (ret < 0)
return ret;
ret = nilfs_sufile_get_header_block(sufile, &header_bh);
if (!ret) {
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
header = kaddr + bh_offset(header_bh);
sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
kunmap_atomic(kaddr, KM_USER0);
brelse(header_bh);
}
return ret;
}
/**
* nilfs_dat_read - read or get dat inode
* @sb: super block instance
* @entry_size: size of a dat entry
* @raw_inode: on-disk dat inode
* @inodep: buffer to store the inode
*/
int nilfs_dat_read(struct super_block *sb, size_t entry_size,
struct nilfs_inode *raw_inode, struct inode **inodep)
{
static struct lock_class_key dat_lock_key;
struct inode *dat;
struct nilfs_dat_info *di;
int err;
dat = nilfs_iget_locked(sb, NULL, NILFS_DAT_INO);
if (unlikely(!dat))
return -ENOMEM;
if (!(dat->i_state & I_NEW))
goto out;
err = nilfs_mdt_init(dat, NILFS_MDT_GFP, sizeof(*di));
if (err)
goto failed;
err = nilfs_palloc_init_blockgroup(dat, entry_size);
if (err)
goto failed;
di = NILFS_DAT_I(dat);
lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
nilfs_palloc_setup_cache(dat, &di->palloc_cache);
nilfs_mdt_setup_shadow_map(dat, &di->shadow);
err = nilfs_read_inode_common(dat, raw_inode);
if (err)
goto failed;
unlock_new_inode(dat);
out:
*inodep = dat;
return 0;
failed:
iget_failed(dat);
return err;
}
/**
* nilfs_ifile_read - read or get ifile inode
* @sb: super block instance
* @root: root object
* @inode_size: size of an inode
* @raw_inode: on-disk ifile inode
* @inodep: buffer to store the inode
*/
int nilfs_ifile_read(struct super_block *sb, struct nilfs_root *root,
size_t inode_size, struct nilfs_inode *raw_inode,
struct inode **inodep)
{
struct inode *ifile;
int err;
ifile = nilfs_iget_locked(sb, root, NILFS_IFILE_INO);
if (unlikely(!ifile))
return -ENOMEM;
if (!(ifile->i_state & I_NEW))
goto out;
err = nilfs_mdt_init(ifile, NILFS_MDT_GFP,
sizeof(struct nilfs_ifile_info));
if (err)
goto failed;
err = nilfs_palloc_init_blockgroup(ifile, inode_size);
if (err)
goto failed;
nilfs_palloc_setup_cache(ifile, &NILFS_IFILE_I(ifile)->palloc_cache);
err = nilfs_read_inode_common(ifile, raw_inode);
if (err)
goto failed;
unlock_new_inode(ifile);
out:
*inodep = ifile;
return 0;
failed:
iget_failed(ifile);
return err;
}
/**
* nilfs_sufile_read - read or get sufile inode
* @sb: super block instance
* @susize: size of a segment usage entry
* @raw_inode: on-disk sufile inode
* @inodep: buffer to store the inode
*/
int nilfs_sufile_read(struct super_block *sb, size_t susize,
struct nilfs_inode *raw_inode, struct inode **inodep)
{
struct inode *sufile;
struct nilfs_sufile_info *sui;
struct buffer_head *header_bh;
struct nilfs_sufile_header *header;
void *kaddr;
int err;
if (susize > sb->s_blocksize) {
printk(KERN_ERR
"NILFS: too large segment usage size: %zu bytes.\n",
susize);
return -EINVAL;
} else if (susize < NILFS_MIN_SEGMENT_USAGE_SIZE) {
printk(KERN_ERR
"NILFS: too small segment usage size: %zu bytes.\n",
susize);
return -EINVAL;
}
sufile = nilfs_iget_locked(sb, NULL, NILFS_SUFILE_INO);
if (unlikely(!sufile))
return -ENOMEM;
if (!(sufile->i_state & I_NEW))
goto out;
err = nilfs_mdt_init(sufile, NILFS_MDT_GFP, sizeof(*sui));
if (err)
goto failed;
nilfs_mdt_set_entry_size(sufile, susize,
sizeof(struct nilfs_sufile_header));
err = nilfs_read_inode_common(sufile, raw_inode);
if (err)
goto failed;
err = nilfs_sufile_get_header_block(sufile, &header_bh);
if (err)
goto failed;
sui = NILFS_SUI(sufile);
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
header = kaddr + bh_offset(header_bh);
sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
kunmap_atomic(kaddr, KM_USER0);
brelse(header_bh);
sui->allocmax = nilfs_sufile_get_nsegments(sufile) - 1;
sui->allocmin = 0;
unlock_new_inode(sufile);
out:
*inodep = sufile;
return 0;
failed:
iget_failed(sufile);
return err;
}
int nilfs_cpfile_read(struct inode *cpfile, struct nilfs_inode *raw_inode)
{
return nilfs_read_inode_common(cpfile, raw_inode);
}
