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;
}
struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct the_nilfs *nilfs = sb->s_fs_info;
struct inode *inode;
struct nilfs_inode_info *ii;
struct nilfs_root *root;
int err = -ENOMEM;
ino_t ino;
inode = new_inode(sb);
if (unlikely(!inode))
goto failed;
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
root = NILFS_I(dir)->i_root;
ii = NILFS_I(inode);
ii->i_state = 1 << NILFS_I_NEW;
ii->i_root = root;
err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
if (unlikely(err))
goto failed_ifile_create_inode;
/* reference count of i_bh inherits from nilfs_mdt_read_block() */
atomic_inc(&root->inodes_count);
inode_init_owner(inode, dir, mode);
inode->i_ino = ino;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
err = nilfs_bmap_read(ii->i_bmap, NULL);
if (err < 0)
goto failed_bmap;
set_bit(NILFS_I_BMAP, &ii->i_state);
/* No lock is needed; iget() ensures it. */
}
ii->i_flags = nilfs_mask_flags(
mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED);
/* ii->i_file_acl = 0; */
/* ii->i_dir_acl = 0; */
ii->i_dir_start_lookup = 0;
nilfs_set_inode_flags(inode);
spin_lock(&nilfs->ns_next_gen_lock);
inode->i_generation = nilfs->ns_next_generation++;
spin_unlock(&nilfs->ns_next_gen_lock);
insert_inode_hash(inode);
err = nilfs_init_acl(inode, dir);
if (unlikely(err))
goto failed_acl; /* never occur. When supporting
nilfs_init_acl(), proper cancellation of
above jobs should be considered */
return inode;
failed_acl:
failed_bmap:
clear_nlink(inode);
iput(inode); /* raw_inode will be deleted through
generic_delete_inode() */
goto failed;
failed_ifile_create_inode:
make_bad_inode(inode);
iput(inode); /* if i_nlink == 1, generic_forget_inode() will be
called */
failed:
return ERR_PTR(err);
}
static int nilfs_insert_inode_locked(struct inode *inode,
struct nilfs_root *root,
unsigned long ino)
{
struct nilfs_iget_args args = {
.ino = ino, .root = root, .cno = 0, .for_gc = 0
};
return insert_inode_locked4(inode, ino, nilfs_iget_test, &args);
}
struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct the_nilfs *nilfs = sb->s_fs_info;
struct inode *inode;
struct nilfs_inode_info *ii;
struct nilfs_root *root;
int err = -ENOMEM;
ino_t ino;
inode = new_inode(sb);
if (unlikely(!inode))
goto failed;
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_constraint(inode->i_mapping, ~__GFP_FS));
root = NILFS_I(dir)->i_root;
ii = NILFS_I(inode);
ii->i_state = BIT(NILFS_I_NEW);
ii->i_root = root;
err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
if (unlikely(err))
goto failed_ifile_create_inode;
/* reference count of i_bh inherits from nilfs_mdt_read_block() */
atomic64_inc(&root->inodes_count);
inode_init_owner(inode, dir, mode);
inode->i_ino = ino;
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
err = nilfs_bmap_read(ii->i_bmap, NULL);
if (err < 0)
goto failed_after_creation;
set_bit(NILFS_I_BMAP, &ii->i_state);
/* No lock is needed; iget() ensures it. */
}
ii->i_flags = nilfs_mask_flags(
mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED);
/* ii->i_file_acl = 0; */
/* ii->i_dir_acl = 0; */
ii->i_dir_start_lookup = 0;
nilfs_set_inode_flags(inode);
spin_lock(&nilfs->ns_next_gen_lock);
inode->i_generation = nilfs->ns_next_generation++;
spin_unlock(&nilfs->ns_next_gen_lock);
if (nilfs_insert_inode_locked(inode, root, ino) < 0) {
err = -EIO;
goto failed_after_creation;
}
err = nilfs_init_acl(inode, dir);
if (unlikely(err))
/*
* Never occur. When supporting nilfs_init_acl(),
* proper cancellation of above jobs should be considered.
*/
goto failed_after_creation;
return inode;
failed_after_creation:
clear_nlink(inode);
unlock_new_inode(inode);
iput(inode); /*
* raw_inode will be deleted through
* nilfs_evict_inode().
*/
goto failed;
failed_ifile_create_inode:
make_bad_inode(inode);
iput(inode);
failed:
return ERR_PTR(err);
}
void nilfs_set_inode_flags(struct inode *inode)
{
unsigned int flags = NILFS_I(inode)->i_flags;
unsigned int new_fl = 0;
if (flags & FS_SYNC_FL)
new_fl |= S_SYNC;
if (flags & FS_APPEND_FL)
new_fl |= S_APPEND;
if (flags & FS_IMMUTABLE_FL)
new_fl |= S_IMMUTABLE;
if (flags & FS_NOATIME_FL)
new_fl |= S_NOATIME;
if (flags & FS_DIRSYNC_FL)
new_fl |= S_DIRSYNC;
inode_set_flags(inode, new_fl, S_SYNC | S_APPEND | S_IMMUTABLE |
S_NOATIME | S_DIRSYNC);
}
struct inode *nilfs_new_inode(struct inode *dir, int mode)
{
struct super_block *sb = dir->i_sb;
struct nilfs_sb_info *sbi = NILFS_SB(sb);
struct inode *inode;
struct nilfs_inode_info *ii;
int err = -ENOMEM;
ino_t ino;
inode = new_inode(sb);
if (unlikely(!inode))
goto failed;
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
ii = NILFS_I(inode);
ii->i_state = 1 << NILFS_I_NEW;
err = nilfs_ifile_create_inode(sbi->s_ifile, &ino, &ii->i_bh);
if (unlikely(err))
goto failed_ifile_create_inode;
/* reference count of i_bh inherits from nilfs_mdt_read_block() */
atomic_inc(&sbi->s_inodes_count);
inode->i_uid = current_fsuid();
if (dir->i_mode & S_ISGID) {
inode->i_gid = dir->i_gid;
if (S_ISDIR(mode))
mode |= S_ISGID;
} else
inode->i_gid = current_fsgid();
inode->i_mode = mode;
inode->i_ino = ino;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
err = nilfs_bmap_read(ii->i_bmap, NULL);
if (err < 0)
goto failed_bmap;
set_bit(NILFS_I_BMAP, &ii->i_state);
/* No lock is needed; iget() ensures it. */
}
ii->i_flags = NILFS_I(dir)->i_flags;
if (S_ISLNK(mode))
ii->i_flags &= ~(NILFS_IMMUTABLE_FL | NILFS_APPEND_FL);
if (!S_ISDIR(mode))
ii->i_flags &= ~NILFS_DIRSYNC_FL;
/* ii->i_file_acl = 0; */
/* ii->i_dir_acl = 0; */
ii->i_dir_start_lookup = 0;
ii->i_cno = 0;
nilfs_set_inode_flags(inode);
spin_lock(&sbi->s_next_gen_lock);
inode->i_generation = sbi->s_next_generation++;
spin_unlock(&sbi->s_next_gen_lock);
insert_inode_hash(inode);
err = nilfs_init_acl(inode, dir);
if (unlikely(err))
goto failed_acl; /* never occur. When supporting
nilfs_init_acl(), proper cancellation of
above jobs should be considered */
mark_inode_dirty(inode);
return inode;
failed_acl:
failed_bmap:
inode->i_nlink = 0;
iput(inode); /* raw_inode will be deleted through
generic_delete_inode() */
goto failed;
failed_ifile_create_inode:
make_bad_inode(inode);
iput(inode); /* if i_nlink == 1, generic_forget_inode() will be
called */
failed:
return ERR_PTR(err);
}
struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct the_nilfs *nilfs = sb->s_fs_info;
struct inode *inode;
struct nilfs_inode_info *ii;
struct nilfs_root *root;
int err = -ENOMEM;
ino_t ino;
inode = new_inode(sb);
if (unlikely(!inode))
goto failed;
mapping_set_gfp_mask(inode->i_mapping,
mapping_gfp_mask(inode->i_mapping) & ~__GFP_FS);
root = NILFS_I(dir)->i_root;
ii = NILFS_I(inode);
ii->i_state = 1 << NILFS_I_NEW;
ii->i_root = root;
err = nilfs_ifile_create_inode(root->ifile, &ino, &ii->i_bh);
if (unlikely(err))
goto failed_ifile_create_inode;
atomic_inc(&root->inodes_count);
inode_init_owner(inode, dir, mode);
inode->i_ino = ino;
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
err = nilfs_bmap_read(ii->i_bmap, NULL);
if (err < 0)
goto failed_bmap;
set_bit(NILFS_I_BMAP, &ii->i_state);
}
ii->i_flags = nilfs_mask_flags(
mode, NILFS_I(dir)->i_flags & NILFS_FL_INHERITED);
ii->i_dir_start_lookup = 0;
nilfs_set_inode_flags(inode);
spin_lock(&nilfs->ns_next_gen_lock);
inode->i_generation = nilfs->ns_next_generation++;
spin_unlock(&nilfs->ns_next_gen_lock);
insert_inode_hash(inode);
err = nilfs_init_acl(inode, dir);
if (unlikely(err))
goto failed_acl;
return inode;
failed_acl:
failed_bmap:
clear_nlink(inode);
iput(inode);
goto failed;
failed_ifile_create_inode:
make_bad_inode(inode);
iput(inode);
failed:
return ERR_PTR(err);
}
