Ejemplo n.º 1
0
static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	int err;

	if (!f2fs_sb_has_crypto(inode->i_sb))
		return -EOPNOTSUPP;

	if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
		goto got_it;

	err = mnt_want_write_file(filp);
	if (err)
		return err;

	/* update superblock with uuid */
	generate_random_uuid(sbi->raw_super->encrypt_pw_salt);

	err = f2fs_commit_super(sbi, false);

	mnt_drop_write_file(filp);
	if (err) {
		/* undo new data */
		memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
		return err;
	}
got_it:
	if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
									16))
		return -EFAULT;
	return 0;
}
Ejemplo n.º 2
0
static int uuid_init(const char *file)
{
	FILE *f = NULL;
	int err = 0;

	f = fopen(file, "r");
	if (f) {
		err = 0;
		goto out;
	}

	f = fopen(file, "w");
	if (!f) {
		err = errno;
		warning("uuid: fopen() %s (%m)\n", file, err);
		goto out;
	}

	err = generate_random_uuid(f);
	if (err) {
		warning("uuid: generate random UUID failed (%m)\n", err);
		goto out;
	}

	info("uuid: generated new UUID in %s\n", file);

 out:
	if (f)
		fclose(f);

	return err;
}
Ejemplo n.º 3
0
int reiserfs_convert_objectid_map_v1(struct super_block *s)
{
	struct reiserfs_super_block *disk_sb = SB_DISK_SUPER_BLOCK(s);
	int cur_size = sb_oid_cursize(disk_sb);
	int new_size = (s->s_blocksize - SB_SIZE) / sizeof(__u32) / 2 * 2;
	int old_max = sb_oid_maxsize(disk_sb);
	struct reiserfs_super_block_v1 *disk_sb_v1;
	__le32 *objectid_map, *new_objectid_map;
	int i;

	disk_sb_v1 =
	    (struct reiserfs_super_block_v1 *)(SB_BUFFER_WITH_SB(s)->b_data);
	objectid_map = (__le32 *) (disk_sb_v1 + 1);
	new_objectid_map = (__le32 *) (disk_sb + 1);

	if (cur_size > new_size) {
		/* mark everyone used that was listed as free at the end of the objectid
		 ** map
		 */
		objectid_map[new_size - 1] = objectid_map[cur_size - 1];
		set_sb_oid_cursize(disk_sb, new_size);
	}
	/* move the smaller objectid map past the end of the new super */
	for (i = new_size - 1; i >= 0; i--) {
		objectid_map[i + (old_max - new_size)] = objectid_map[i];
	}

	/* set the max size so we don't overflow later */
	set_sb_oid_maxsize(disk_sb, new_size);

	/* Zero out label and generate random UUID */
	memset(disk_sb->s_label, 0, sizeof(disk_sb->s_label));
	generate_random_uuid(disk_sb->s_uuid);

	/* finally, zero out the unused chunk of the new super */
	memset(disk_sb->s_unused, 0, sizeof(disk_sb->s_unused));
	return 0;
}
Ejemplo n.º 4
0
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct super_block *sb = inode->i_sb;
	struct ext4_inode_info *ei = EXT4_I(inode);
	unsigned int flags;

	ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);

	switch (cmd) {
	case EXT4_IOC_GETFLAGS:
		ext4_get_inode_flags(ei);
		flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
		return put_user(flags, (int __user *) arg);
	case EXT4_IOC_SETFLAGS: {
		handle_t *handle = NULL;
		int err, migrate = 0;
		struct ext4_iloc iloc;
		unsigned int oldflags, mask, i;
		unsigned int jflag;

		if (!inode_owner_or_capable(inode))
			return -EACCES;

		if (get_user(flags, (int __user *) arg))
			return -EFAULT;

		err = mnt_want_write_file(filp);
		if (err)
			return err;

		flags = ext4_mask_flags(inode->i_mode, flags);

		err = -EPERM;
		mutex_lock(&inode->i_mutex);
		/* Is it quota file? Do not allow user to mess with it */
		if (IS_NOQUOTA(inode))
			goto flags_out;

		oldflags = ei->i_flags;

		/* The JOURNAL_DATA flag is modifiable only by root */
		jflag = flags & EXT4_JOURNAL_DATA_FL;

		/*
		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
		 * the relevant capability.
		 *
		 * This test looks nicer. Thanks to Pauline Middelink
		 */
		if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
			if (!capable(CAP_LINUX_IMMUTABLE))
				goto flags_out;
		}

		/*
		 * The JOURNAL_DATA flag can only be changed by
		 * the relevant capability.
		 */
		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
			if (!capable(CAP_SYS_RESOURCE))
				goto flags_out;
		}
		if ((flags ^ oldflags) & EXT4_EXTENTS_FL)
			migrate = 1;

		if (flags & EXT4_EOFBLOCKS_FL) {
			/* we don't support adding EOFBLOCKS flag */
			if (!(oldflags & EXT4_EOFBLOCKS_FL)) {
				err = -EOPNOTSUPP;
				goto flags_out;
			}
		} else if (oldflags & EXT4_EOFBLOCKS_FL)
			ext4_truncate(inode);

		handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
		if (IS_ERR(handle)) {
			err = PTR_ERR(handle);
			goto flags_out;
		}
		if (IS_SYNC(inode))
			ext4_handle_sync(handle);
		err = ext4_reserve_inode_write(handle, inode, &iloc);
		if (err)
			goto flags_err;

		for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
			if (!(mask & EXT4_FL_USER_MODIFIABLE))
				continue;
			if (mask & flags)
				ext4_set_inode_flag(inode, i);
			else
				ext4_clear_inode_flag(inode, i);
		}

		ext4_set_inode_flags(inode);
		inode->i_ctime = ext4_current_time(inode);

		err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
		ext4_journal_stop(handle);
		if (err)
			goto flags_out;

		if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
			err = ext4_change_inode_journal_flag(inode, jflag);
		if (err)
			goto flags_out;
		if (migrate) {
			if (flags & EXT4_EXTENTS_FL)
				err = ext4_ext_migrate(inode);
			else
				err = ext4_ind_migrate(inode);
		}

flags_out:
		mutex_unlock(&inode->i_mutex);
		mnt_drop_write_file(filp);
		return err;
	}
	case EXT4_IOC_GETVERSION:
	case EXT4_IOC_GETVERSION_OLD:
		return put_user(inode->i_generation, (int __user *) arg);
	case EXT4_IOC_SETVERSION:
	case EXT4_IOC_SETVERSION_OLD: {
		handle_t *handle;
		struct ext4_iloc iloc;
		__u32 generation;
		int err;

		if (!inode_owner_or_capable(inode))
			return -EPERM;

		if (ext4_has_metadata_csum(inode->i_sb)) {
			ext4_warning(sb, "Setting inode version is not "
				     "supported with metadata_csum enabled.");
			return -ENOTTY;
		}

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		if (get_user(generation, (int __user *) arg)) {
			err = -EFAULT;
			goto setversion_out;
		}

		mutex_lock(&inode->i_mutex);
		handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
		if (IS_ERR(handle)) {
			err = PTR_ERR(handle);
			goto unlock_out;
		}
		err = ext4_reserve_inode_write(handle, inode, &iloc);
		if (err == 0) {
			inode->i_ctime = ext4_current_time(inode);
			inode->i_generation = generation;
			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
		}
		ext4_journal_stop(handle);

unlock_out:
		mutex_unlock(&inode->i_mutex);
setversion_out:
		mnt_drop_write_file(filp);
		return err;
	}
	case EXT4_IOC_GROUP_EXTEND: {
		ext4_fsblk_t n_blocks_count;
		int err, err2=0;

		err = ext4_resize_begin(sb);
		if (err)
			return err;

		if (get_user(n_blocks_count, (__u32 __user *)arg)) {
			err = -EFAULT;
			goto group_extend_out;
		}

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "Online resizing not supported with bigalloc");
			err = -EOPNOTSUPP;
			goto group_extend_out;
		}

		err = mnt_want_write_file(filp);
		if (err)
			goto group_extend_out;

		err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
		if (EXT4_SB(sb)->s_journal) {
			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
		}
		if (err == 0)
			err = err2;
		mnt_drop_write_file(filp);
group_extend_out:
		ext4_resize_end(sb);
		return err;
	}

	case EXT4_IOC_MOVE_EXT: {
		struct move_extent me;
		struct fd donor;
		int err;

		if (!(filp->f_mode & FMODE_READ) ||
		    !(filp->f_mode & FMODE_WRITE))
			return -EBADF;

		if (copy_from_user(&me,
			(struct move_extent __user *)arg, sizeof(me)))
			return -EFAULT;
		me.moved_len = 0;

		donor = fdget(me.donor_fd);
		if (!donor.file)
			return -EBADF;

		if (!(donor.file->f_mode & FMODE_WRITE)) {
			err = -EBADF;
			goto mext_out;
		}

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "Online defrag not supported with bigalloc");
			err = -EOPNOTSUPP;
			goto mext_out;
		}

		err = mnt_want_write_file(filp);
		if (err)
			goto mext_out;

		err = ext4_move_extents(filp, donor.file, me.orig_start,
					me.donor_start, me.len, &me.moved_len);
		mnt_drop_write_file(filp);

		if (copy_to_user((struct move_extent __user *)arg,
				 &me, sizeof(me)))
			err = -EFAULT;
mext_out:
		fdput(donor);
		return err;
	}

	case EXT4_IOC_GROUP_ADD: {
		struct ext4_new_group_data input;
		int err, err2=0;

		err = ext4_resize_begin(sb);
		if (err)
			return err;

		if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
				sizeof(input))) {
			err = -EFAULT;
			goto group_add_out;
		}

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "Online resizing not supported with bigalloc");
			err = -EOPNOTSUPP;
			goto group_add_out;
		}

		err = mnt_want_write_file(filp);
		if (err)
			goto group_add_out;

		err = ext4_group_add(sb, &input);
		if (EXT4_SB(sb)->s_journal) {
			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
		}
		if (err == 0)
			err = err2;
		mnt_drop_write_file(filp);
		if (!err && ext4_has_group_desc_csum(sb) &&
		    test_opt(sb, INIT_INODE_TABLE))
			err = ext4_register_li_request(sb, input.group);
group_add_out:
		ext4_resize_end(sb);
		return err;
	}

	case EXT4_IOC_MIGRATE:
	{
		int err;
		if (!inode_owner_or_capable(inode))
			return -EACCES;

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		/*
		 * inode_mutex prevent write and truncate on the file.
		 * Read still goes through. We take i_data_sem in
		 * ext4_ext_swap_inode_data before we switch the
		 * inode format to prevent read.
		 */
		mutex_lock(&(inode->i_mutex));
		err = ext4_ext_migrate(inode);
		mutex_unlock(&(inode->i_mutex));
		mnt_drop_write_file(filp);
		return err;
	}

	case EXT4_IOC_ALLOC_DA_BLKS:
	{
		int err;
		if (!inode_owner_or_capable(inode))
			return -EACCES;

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		err = ext4_alloc_da_blocks(inode);
		mnt_drop_write_file(filp);
		return err;
	}

	case EXT4_IOC_SWAP_BOOT:
	{
		int err;
		if (!(filp->f_mode & FMODE_WRITE))
			return -EBADF;
		err = mnt_want_write_file(filp);
		if (err)
			return err;
		err = swap_inode_boot_loader(sb, inode);
		mnt_drop_write_file(filp);
		return err;
	}

	case EXT4_IOC_RESIZE_FS: {
		ext4_fsblk_t n_blocks_count;
		int err = 0, err2 = 0;
		ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;

		if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
			       EXT4_FEATURE_RO_COMPAT_BIGALLOC)) {
			ext4_msg(sb, KERN_ERR,
				 "Online resizing not (yet) supported with bigalloc");
			return -EOPNOTSUPP;
		}

		if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
				   sizeof(__u64))) {
			return -EFAULT;
		}

		err = ext4_resize_begin(sb);
		if (err)
			return err;

		err = mnt_want_write_file(filp);
		if (err)
			goto resizefs_out;

		err = ext4_resize_fs(sb, n_blocks_count);
		if (EXT4_SB(sb)->s_journal) {
			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
		}
		if (err == 0)
			err = err2;
		mnt_drop_write_file(filp);
		if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
		    ext4_has_group_desc_csum(sb) &&
		    test_opt(sb, INIT_INODE_TABLE))
			err = ext4_register_li_request(sb, o_group);

resizefs_out:
		ext4_resize_end(sb);
		return err;
	}

	case FITRIM:
	{
		struct request_queue *q = bdev_get_queue(sb->s_bdev);
		struct fstrim_range range;
		int ret = 0;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		if (!blk_queue_discard(q))
			return -EOPNOTSUPP;

		if (copy_from_user(&range, (struct fstrim_range __user *)arg,
		    sizeof(range)))
			return -EFAULT;

		range.minlen = max((unsigned int)range.minlen,
				   q->limits.discard_granularity);
		ret = ext4_trim_fs(sb, &range);
		if (ret < 0)
			return ret;

		if (copy_to_user((struct fstrim_range __user *)arg, &range,
		    sizeof(range)))
			return -EFAULT;

		return 0;
	}
	case EXT4_IOC_PRECACHE_EXTENTS:
		return ext4_ext_precache(inode);
	case EXT4_IOC_SET_ENCRYPTION_POLICY: {
#ifdef CONFIG_EXT4_FS_ENCRYPTION
		struct ext4_encryption_policy policy;
		int err = 0;

		if (copy_from_user(&policy,
				   (struct ext4_encryption_policy __user *)arg,
				   sizeof(policy))) {
			err = -EFAULT;
			goto encryption_policy_out;
		}

		err = ext4_process_policy(&policy, inode);
encryption_policy_out:
		return err;
#else
		return -EOPNOTSUPP;
#endif
	}
	case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
		int err, err2;
		struct ext4_sb_info *sbi = EXT4_SB(sb);
		handle_t *handle;

		if (!ext4_sb_has_crypto(sb))
			return -EOPNOTSUPP;
		if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
			err = mnt_want_write_file(filp);
			if (err)
				return err;
			handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
			if (IS_ERR(handle)) {
				err = PTR_ERR(handle);
				goto pwsalt_err_exit;
			}
			err = ext4_journal_get_write_access(handle, sbi->s_sbh);
			if (err)
				goto pwsalt_err_journal;
			generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
			err = ext4_handle_dirty_metadata(handle, NULL,
							 sbi->s_sbh);
		pwsalt_err_journal:
			err2 = ext4_journal_stop(handle);
			if (err2 && !err)
				err = err2;
		pwsalt_err_exit:
			mnt_drop_write_file(filp);
			if (err)
				return err;
		}
		if (copy_to_user((void *) arg, sbi->s_es->s_encrypt_pw_salt,
				 16))
			return -EFAULT;
		return 0;
	}
	case EXT4_IOC_GET_ENCRYPTION_POLICY: {
#ifdef CONFIG_EXT4_FS_ENCRYPTION
		struct ext4_encryption_policy policy;
		int err = 0;

		if (!ext4_encrypted_inode(inode))
			return -ENOENT;
		err = ext4_get_policy(inode, &policy);
		if (err)
			return err;
		if (copy_to_user((void *)arg, &policy, sizeof(policy)))
			return -EFAULT;
		return 0;
#else
		return -EOPNOTSUPP;
#endif
	}
	default:
		return -ENOTTY;
	}
}
Ejemplo n.º 5
0
/**
 * create_default_filesystem - format empty UBI volume.
 * @c: UBIFS file-system description object
 *
 * This function creates default empty file-system. Returns zero in case of
 * success and a negative error code in case of failure.
 */
static int create_default_filesystem(struct ubifs_info *c)
{
	struct ubifs_sb_node *sup;
	struct ubifs_mst_node *mst;
	struct ubifs_idx_node *idx;
	struct ubifs_branch *br;
	struct ubifs_ino_node *ino;
	struct ubifs_cs_node *cs;
	union ubifs_key key;
	int err, tmp, jnl_lebs, log_lebs, max_buds, main_lebs, main_first;
	int lpt_lebs, lpt_first, orph_lebs, big_lpt, ino_waste, sup_flags = 0;
	int min_leb_cnt = UBIFS_MIN_LEB_CNT;
	long long tmp64, main_bytes;
	__le64 tmp_le64;

	/* Some functions called from here depend on the @c->key_len filed */
	c->key_len = UBIFS_SK_LEN;

	/*
	 * First of all, we have to calculate default file-system geometry -
	 * log size, journal size, etc.
	 */
	if (c->leb_cnt < 0x7FFFFFFF / DEFAULT_JNL_PERCENT)
		/* We can first multiply then divide and have no overflow */
		jnl_lebs = c->leb_cnt * DEFAULT_JNL_PERCENT / 100;
	else
		jnl_lebs = (c->leb_cnt / 100) * DEFAULT_JNL_PERCENT;

	if (jnl_lebs < UBIFS_MIN_JNL_LEBS)
		jnl_lebs = UBIFS_MIN_JNL_LEBS;
	if (jnl_lebs * c->leb_size > DEFAULT_MAX_JNL)
		jnl_lebs = DEFAULT_MAX_JNL / c->leb_size;

	/*
	 * The log should be large enough to fit reference nodes for all bud
	 * LEBs. Because buds do not have to start from the beginning of LEBs
	 * (half of the LEB may contain committed data), the log should
	 * generally be larger, make it twice as large.
	 */
	tmp = 2 * (c->ref_node_alsz * jnl_lebs) + c->leb_size - 1;
	log_lebs = tmp / c->leb_size;
	/* Plus one LEB reserved for commit */
	log_lebs += 1;
	if (c->leb_cnt - min_leb_cnt > 8) {
		/* And some extra space to allow writes while committing */
		log_lebs += 1;
		min_leb_cnt += 1;
	}

	max_buds = jnl_lebs - log_lebs;
	if (max_buds < UBIFS_MIN_BUD_LEBS)
		max_buds = UBIFS_MIN_BUD_LEBS;

	/*
	 * Orphan nodes are stored in a separate area. One node can store a lot
	 * of orphan inode numbers, but when new orphan comes we just add a new
	 * orphan node. At some point the nodes are consolidated into one
	 * orphan node.
	 */
	orph_lebs = UBIFS_MIN_ORPH_LEBS;
#ifdef CONFIG_UBIFS_FS_DEBUG
	if (c->leb_cnt - min_leb_cnt > 1)
		/*
		 * For debugging purposes it is better to have at least 2
		 * orphan LEBs, because the orphan subsystem would need to do
		 * consolidations and would be stressed more.
		 */
		orph_lebs += 1;
#endif

	main_lebs = c->leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS - log_lebs;
	main_lebs -= orph_lebs;

	lpt_first = UBIFS_LOG_LNUM + log_lebs;
	c->lsave_cnt = DEFAULT_LSAVE_CNT;
	c->max_leb_cnt = c->leb_cnt;
	err = ubifs_create_dflt_lpt(c, &main_lebs, lpt_first, &lpt_lebs,
				    &big_lpt);
	if (err)
		return err;

	dbg_gen("LEB Properties Tree created (LEBs %d-%d)", lpt_first,
		lpt_first + lpt_lebs - 1);

	main_first = c->leb_cnt - main_lebs;

	/* Create default superblock */
	tmp = ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size);
	sup = kzalloc(tmp, GFP_KERNEL);
	if (!sup)
		return -ENOMEM;

	tmp64 = (long long)max_buds * c->leb_size;
	if (big_lpt)
		sup_flags |= UBIFS_FLG_BIGLPT;

	sup->ch.node_type  = UBIFS_SB_NODE;
	sup->key_hash      = UBIFS_KEY_HASH_R5;
	sup->flags         = cpu_to_le32(sup_flags);
	sup->min_io_size   = cpu_to_le32(c->min_io_size);
	sup->leb_size      = cpu_to_le32(c->leb_size);
	sup->leb_cnt       = cpu_to_le32(c->leb_cnt);
	sup->max_leb_cnt   = cpu_to_le32(c->max_leb_cnt);
	sup->max_bud_bytes = cpu_to_le64(tmp64);
	sup->log_lebs      = cpu_to_le32(log_lebs);
	sup->lpt_lebs      = cpu_to_le32(lpt_lebs);
	sup->orph_lebs     = cpu_to_le32(orph_lebs);
	sup->jhead_cnt     = cpu_to_le32(DEFAULT_JHEADS_CNT);
	sup->fanout        = cpu_to_le32(DEFAULT_FANOUT);
	sup->lsave_cnt     = cpu_to_le32(c->lsave_cnt);
	sup->fmt_version   = cpu_to_le32(UBIFS_FORMAT_VERSION);
	sup->time_gran     = cpu_to_le32(DEFAULT_TIME_GRAN);
	if (c->mount_opts.override_compr)
		sup->default_compr = cpu_to_le16(c->mount_opts.compr_type);
	else
		sup->default_compr = cpu_to_le16(UBIFS_COMPR_LZO);

	generate_random_uuid(sup->uuid);

	main_bytes = (long long)main_lebs * c->leb_size;
	tmp64 = div_u64(main_bytes * DEFAULT_RP_PERCENT, 100);
	if (tmp64 > DEFAULT_MAX_RP_SIZE)
		tmp64 = DEFAULT_MAX_RP_SIZE;
	sup->rp_size = cpu_to_le64(tmp64);
	sup->ro_compat_version = cpu_to_le32(UBIFS_RO_COMPAT_VERSION);

	err = ubifs_write_node(c, sup, UBIFS_SB_NODE_SZ, 0, 0, UBI_LONGTERM);
	kfree(sup);
	if (err)
		return err;

	dbg_gen("default superblock created at LEB 0:0");

	/* Create default master node */
	mst = kzalloc(c->mst_node_alsz, GFP_KERNEL);
	if (!mst)
		return -ENOMEM;

	mst->ch.node_type = UBIFS_MST_NODE;
	mst->log_lnum     = cpu_to_le32(UBIFS_LOG_LNUM);
	mst->highest_inum = cpu_to_le64(UBIFS_FIRST_INO);
	mst->cmt_no       = 0;
	mst->root_lnum    = cpu_to_le32(main_first + DEFAULT_IDX_LEB);
	mst->root_offs    = 0;
	tmp = ubifs_idx_node_sz(c, 1);
	mst->root_len     = cpu_to_le32(tmp);
	mst->gc_lnum      = cpu_to_le32(main_first + DEFAULT_GC_LEB);
	mst->ihead_lnum   = cpu_to_le32(main_first + DEFAULT_IDX_LEB);
	mst->ihead_offs   = cpu_to_le32(ALIGN(tmp, c->min_io_size));
	mst->index_size   = cpu_to_le64(ALIGN(tmp, 8));
	mst->lpt_lnum     = cpu_to_le32(c->lpt_lnum);
	mst->lpt_offs     = cpu_to_le32(c->lpt_offs);
	mst->nhead_lnum   = cpu_to_le32(c->nhead_lnum);
	mst->nhead_offs   = cpu_to_le32(c->nhead_offs);
	mst->ltab_lnum    = cpu_to_le32(c->ltab_lnum);
	mst->ltab_offs    = cpu_to_le32(c->ltab_offs);
	mst->lsave_lnum   = cpu_to_le32(c->lsave_lnum);
	mst->lsave_offs   = cpu_to_le32(c->lsave_offs);
	mst->lscan_lnum   = cpu_to_le32(main_first);
	mst->empty_lebs   = cpu_to_le32(main_lebs - 2);
	mst->idx_lebs     = cpu_to_le32(1);
	mst->leb_cnt      = cpu_to_le32(c->leb_cnt);

	/* Calculate lprops statistics */
	tmp64 = main_bytes;
	tmp64 -= ALIGN(ubifs_idx_node_sz(c, 1), c->min_io_size);
	tmp64 -= ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size);
	mst->total_free = cpu_to_le64(tmp64);

	tmp64 = ALIGN(ubifs_idx_node_sz(c, 1), c->min_io_size);
	ino_waste = ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size) -
			  UBIFS_INO_NODE_SZ;
	tmp64 += ino_waste;
	tmp64 -= ALIGN(ubifs_idx_node_sz(c, 1), 8);
	mst->total_dirty = cpu_to_le64(tmp64);

	/*  The indexing LEB does not contribute to dark space */
	tmp64 = (c->main_lebs - 1) * c->dark_wm;
	mst->total_dark = cpu_to_le64(tmp64);

	mst->total_used = cpu_to_le64(UBIFS_INO_NODE_SZ);

	err = ubifs_write_node(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM, 0,
			       UBI_UNKNOWN);
	if (err) {
		kfree(mst);
		return err;
	}
	err = ubifs_write_node(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM + 1, 0,
			       UBI_UNKNOWN);
	kfree(mst);
	if (err)
		return err;

	dbg_gen("default master node created at LEB %d:0", UBIFS_MST_LNUM);

	/* Create the root indexing node */
	tmp = ubifs_idx_node_sz(c, 1);
	idx = kzalloc(ALIGN(tmp, c->min_io_size), GFP_KERNEL);
	if (!idx)
		return -ENOMEM;

	c->key_fmt = UBIFS_SIMPLE_KEY_FMT;
	c->key_hash = key_r5_hash;

	idx->ch.node_type = UBIFS_IDX_NODE;
	idx->child_cnt = cpu_to_le16(1);
	ino_key_init(c, &key, UBIFS_ROOT_INO);
	br = ubifs_idx_branch(c, idx, 0);
	key_write_idx(c, &key, &br->key);
	br->lnum = cpu_to_le32(main_first + DEFAULT_DATA_LEB);
	br->len  = cpu_to_le32(UBIFS_INO_NODE_SZ);
	err = ubifs_write_node(c, idx, tmp, main_first + DEFAULT_IDX_LEB, 0,
			       UBI_UNKNOWN);
	kfree(idx);
	if (err)
		return err;

	dbg_gen("default root indexing node created LEB %d:0",
		main_first + DEFAULT_IDX_LEB);

	/* Create default root inode */
	tmp = ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size);
	ino = kzalloc(tmp, GFP_KERNEL);
	if (!ino)
		return -ENOMEM;

	ino_key_init_flash(c, &ino->key, UBIFS_ROOT_INO);
	ino->ch.node_type = UBIFS_INO_NODE;
	ino->creat_sqnum = cpu_to_le64(++c->max_sqnum);
	ino->nlink = cpu_to_le32(2);
	tmp_le64 = cpu_to_le64(CURRENT_TIME_SEC.tv_sec);
	ino->atime_sec   = tmp_le64;
	ino->ctime_sec   = tmp_le64;
	ino->mtime_sec   = tmp_le64;
	ino->atime_nsec  = 0;
	ino->ctime_nsec  = 0;
	ino->mtime_nsec  = 0;
	ino->mode = cpu_to_le32(S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO);
	ino->size = cpu_to_le64(UBIFS_INO_NODE_SZ);

	/* Set compression enabled by default */
	ino->flags = cpu_to_le32(UBIFS_COMPR_FL);

	err = ubifs_write_node(c, ino, UBIFS_INO_NODE_SZ,
			       main_first + DEFAULT_DATA_LEB, 0,
			       UBI_UNKNOWN);
	kfree(ino);
	if (err)
		return err;

	dbg_gen("root inode created at LEB %d:0",
		main_first + DEFAULT_DATA_LEB);

	/*
	 * The first node in the log has to be the commit start node. This is
	 * always the case during normal file-system operation. Write a fake
	 * commit start node to the log.
	 */
	tmp = ALIGN(UBIFS_CS_NODE_SZ, c->min_io_size);
	cs = kzalloc(tmp, GFP_KERNEL);
	if (!cs)
		return -ENOMEM;

	cs->ch.node_type = UBIFS_CS_NODE;
	err = ubifs_write_node(c, cs, UBIFS_CS_NODE_SZ, UBIFS_LOG_LNUM,
			       0, UBI_UNKNOWN);
	kfree(cs);

	ubifs_msg("default file-system created");
	return 0;
}
Ejemplo n.º 6
0
int pmem_header_initialize(struct bittern_cache *bc)
{
	int ret;
	struct pmem_api *pa = &bc->bc_papi;
	struct pmem_header *pm = &pa->papi_hdr;
	size_t cache_size_bytes;

	ASSERT(bc != NULL);
	ASSERT(pa->papi_bdev_size_bytes > 0);
	ASSERT(pa->papi_bdev != NULL);
	ASSERT(sizeof(struct pmem_header) == PAGE_SIZE);

	cache_size_bytes = pa->papi_bdev_size_bytes;
	printk_info("cache_size_bytes=%lu, cache_size_mbytes=%lu\n",
		    cache_size_bytes, cache_size_bytes / (1024 * 1024));

	memset(pm, 0, sizeof(struct pmem_header));
	pm->lm_magic = LM_MAGIC;
	pm->lm_version = LM_VERSION;
	pm->lm_cache_block_size = PAGE_SIZE;

	printk_info("pmem_layout='%c'\n", pmem_cache_layout(bc));
	ASSERT(pmem_cache_layout(bc) == CACHE_LAYOUT_INTERLEAVED ||
	       pmem_cache_layout(bc) == CACHE_LAYOUT_SEQUENTIAL);

	pmem_initialize_pmem_header_sizes(bc, cache_size_bytes);

	ASSERT(LM_NAME_SIZE == sizeof(bc->bc_name));
	ASSERT(sizeof(pm->lm_uuid) == 16);
	ASSERT(sizeof(pm->lm_device_uuid) == 16);

	generate_random_uuid(pm->lm_uuid);
	snprintf(pm->lm_name, LM_NAME_SIZE, "%s", bc->bc_name);

	generate_random_uuid(pm->lm_device_uuid);
	snprintf(pm->lm_device_name,
		 LM_NAME_SIZE, "%s", bc->bc_cached_device_name);

	printk_info("pm->lm_name=%s\n", pm->lm_name);
	printk_info("pm->lm_uuid=%pUb\n", pm->lm_uuid);
	printk_info("pm->lm_device_name=%s\n", pm->lm_device_name);
	printk_info("pm->lm_device_uuid=%pUb\n", pm->lm_device_uuid);
	printk_info("pm->lm_cache_size_bytes=%llu\n",
		    pm->lm_cache_size_bytes);

	pm->lm_xid_first = 1ULL;
	pm->lm_xid_current = 1ULL;

	__pmem_assert_offsets(bc);

	/*
	 * initialize mem copy #0
	 */
	pm->lm_xid_current++;
	pm->lm_hash = murmurhash3_128(pm, PMEM_HEADER_HASHING_SIZE);
	ASSERT(sizeof(struct pmem_header) <= PAGE_SIZE);
	ret = pmem_write_sync(bc,
			      CACHE_MEM_HEADER_0_OFFSET_BYTES,
			      pm,
			      sizeof(struct pmem_header));
	/*TODO_ADD_ERROR_INJECTION*/
	if (ret != 0) {
		ASSERT(ret < 0);
		BT_DEV_TRACE(BT_LEVEL_ERROR, bc, NULL, NULL, NULL, NULL,
			     "pmem_write_sync header0 failed, ret=%d",
			     ret);
		printk_err("%s: pmem_write_sync header0 failed, ret=%d\n",
			   bc->bc_name,
			   ret);
		return ret;
	}

	/*
	 * initialize mem copy #1
	 */
	pm->lm_xid_current++;
	pm->lm_hash = murmurhash3_128(pm, PMEM_HEADER_HASHING_SIZE);
	ASSERT(sizeof(struct pmem_header) <= PAGE_SIZE);
	ret = pmem_write_sync(bc,
			      CACHE_MEM_HEADER_1_OFFSET_BYTES,
			      pm,
			      sizeof(struct pmem_header));
	/*TODO_ADD_ERROR_INJECTION*/
	if (ret != 0) {
		ASSERT(ret < 0);
		BT_DEV_TRACE(BT_LEVEL_ERROR, bc, NULL, NULL, NULL, NULL,
			     "pmem_write_sync header0 failed, ret=%d",
			     ret);
		printk_err("%s: pmem_write_sync header0 failed, ret=%d\n",
			   bc->bc_name,
			   ret);
		return ret;
	}

	/*
	 * also initialize xid and bc_buffer_entries
	 */
	cache_xid_set(bc, pm->lm_xid_current + 1);

	printk_info("cache_blocks=%llu\n", pm->lm_cache_blocks);

	return 0;
}
Ejemplo n.º 7
0
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
	struct inode *inode = file_inode(filp);
	struct super_block *sb = inode->i_sb;
	struct ext4_inode_info *ei = EXT4_I(inode);
	unsigned int flags;

	ext4_debug("cmd = %u, arg = %lu\n", cmd, arg);

	switch (cmd) {
	case FS_IOC_GETFSMAP:
		return ext4_ioc_getfsmap(sb, (void __user *)arg);
	case EXT4_IOC_GETFLAGS:
		flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
		return put_user(flags, (int __user *) arg);
	case EXT4_IOC_SETFLAGS: {
		int err;

		if (!inode_owner_or_capable(inode))
			return -EACCES;

		if (get_user(flags, (int __user *) arg))
			return -EFAULT;

		if (flags & ~EXT4_FL_USER_VISIBLE)
			return -EOPNOTSUPP;
		/*
		 * chattr(1) grabs flags via GETFLAGS, modifies the result and
		 * passes that to SETFLAGS. So we cannot easily make SETFLAGS
		 * more restrictive than just silently masking off visible but
		 * not settable flags as we always did.
		 */
		flags &= EXT4_FL_USER_MODIFIABLE;
		if (ext4_mask_flags(inode->i_mode, flags) != flags)
			return -EOPNOTSUPP;

		err = mnt_want_write_file(filp);
		if (err)
			return err;

		inode_lock(inode);
		err = ext4_ioctl_setflags(inode, flags);
		inode_unlock(inode);
		mnt_drop_write_file(filp);
		return err;
	}
	case EXT4_IOC_GETVERSION:
	case EXT4_IOC_GETVERSION_OLD:
		return put_user(inode->i_generation, (int __user *) arg);
	case EXT4_IOC_SETVERSION:
	case EXT4_IOC_SETVERSION_OLD: {
		handle_t *handle;
		struct ext4_iloc iloc;
		__u32 generation;
		int err;

		if (!inode_owner_or_capable(inode))
			return -EPERM;

		if (ext4_has_metadata_csum(inode->i_sb)) {
			ext4_warning(sb, "Setting inode version is not "
				     "supported with metadata_csum enabled.");
			return -ENOTTY;
		}

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		if (get_user(generation, (int __user *) arg)) {
			err = -EFAULT;
			goto setversion_out;
		}

		inode_lock(inode);
		handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
		if (IS_ERR(handle)) {
			err = PTR_ERR(handle);
			goto unlock_out;
		}
		err = ext4_reserve_inode_write(handle, inode, &iloc);
		if (err == 0) {
			inode->i_ctime = current_time(inode);
			inode->i_generation = generation;
			err = ext4_mark_iloc_dirty(handle, inode, &iloc);
		}
		ext4_journal_stop(handle);

unlock_out:
		inode_unlock(inode);
setversion_out:
		mnt_drop_write_file(filp);
		return err;
	}
	case EXT4_IOC_GROUP_EXTEND: {
		ext4_fsblk_t n_blocks_count;
		int err, err2=0;

		err = ext4_resize_begin(sb);
		if (err)
			return err;

		if (get_user(n_blocks_count, (__u32 __user *)arg)) {
			err = -EFAULT;
			goto group_extend_out;
		}

		if (ext4_has_feature_bigalloc(sb)) {
			ext4_msg(sb, KERN_ERR,
				 "Online resizing not supported with bigalloc");
			err = -EOPNOTSUPP;
			goto group_extend_out;
		}

		err = mnt_want_write_file(filp);
		if (err)
			goto group_extend_out;

		err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
		if (EXT4_SB(sb)->s_journal) {
			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
		}
		if (err == 0)
			err = err2;
		mnt_drop_write_file(filp);
group_extend_out:
		ext4_resize_end(sb);
		return err;
	}

	case EXT4_IOC_MOVE_EXT: {
		struct move_extent me;
		struct fd donor;
		int err;

		if (!(filp->f_mode & FMODE_READ) ||
		    !(filp->f_mode & FMODE_WRITE))
			return -EBADF;

		if (copy_from_user(&me,
			(struct move_extent __user *)arg, sizeof(me)))
			return -EFAULT;
		me.moved_len = 0;

		donor = fdget(me.donor_fd);
		if (!donor.file)
			return -EBADF;

		if (!(donor.file->f_mode & FMODE_WRITE)) {
			err = -EBADF;
			goto mext_out;
		}

		if (ext4_has_feature_bigalloc(sb)) {
			ext4_msg(sb, KERN_ERR,
				 "Online defrag not supported with bigalloc");
			err = -EOPNOTSUPP;
			goto mext_out;
		} else if (IS_DAX(inode)) {
			ext4_msg(sb, KERN_ERR,
				 "Online defrag not supported with DAX");
			err = -EOPNOTSUPP;
			goto mext_out;
		}

		err = mnt_want_write_file(filp);
		if (err)
			goto mext_out;

		err = ext4_move_extents(filp, donor.file, me.orig_start,
					me.donor_start, me.len, &me.moved_len);
		mnt_drop_write_file(filp);

		if (copy_to_user((struct move_extent __user *)arg,
				 &me, sizeof(me)))
			err = -EFAULT;
mext_out:
		fdput(donor);
		return err;
	}

	case EXT4_IOC_GROUP_ADD: {
		struct ext4_new_group_data input;

		if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
				sizeof(input)))
			return -EFAULT;

		return ext4_ioctl_group_add(filp, &input);
	}

	case EXT4_IOC_MIGRATE:
	{
		int err;
		if (!inode_owner_or_capable(inode))
			return -EACCES;

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		/*
		 * inode_mutex prevent write and truncate on the file.
		 * Read still goes through. We take i_data_sem in
		 * ext4_ext_swap_inode_data before we switch the
		 * inode format to prevent read.
		 */
		inode_lock((inode));
		err = ext4_ext_migrate(inode);
		inode_unlock((inode));
		mnt_drop_write_file(filp);
		return err;
	}

	case EXT4_IOC_ALLOC_DA_BLKS:
	{
		int err;
		if (!inode_owner_or_capable(inode))
			return -EACCES;

		err = mnt_want_write_file(filp);
		if (err)
			return err;
		err = ext4_alloc_da_blocks(inode);
		mnt_drop_write_file(filp);
		return err;
	}

	case EXT4_IOC_SWAP_BOOT:
	{
		int err;
		if (!(filp->f_mode & FMODE_WRITE))
			return -EBADF;
		err = mnt_want_write_file(filp);
		if (err)
			return err;
		err = swap_inode_boot_loader(sb, inode);
		mnt_drop_write_file(filp);
		return err;
	}

	case EXT4_IOC_RESIZE_FS: {
		ext4_fsblk_t n_blocks_count;
		int err = 0, err2 = 0;
		ext4_group_t o_group = EXT4_SB(sb)->s_groups_count;

		if (copy_from_user(&n_blocks_count, (__u64 __user *)arg,
				   sizeof(__u64))) {
			return -EFAULT;
		}

		err = ext4_resize_begin(sb);
		if (err)
			return err;

		err = mnt_want_write_file(filp);
		if (err)
			goto resizefs_out;

		err = ext4_resize_fs(sb, n_blocks_count);
		if (EXT4_SB(sb)->s_journal) {
			jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
			err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
			jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
		}
		if (err == 0)
			err = err2;
		mnt_drop_write_file(filp);
		if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
		    ext4_has_group_desc_csum(sb) &&
		    test_opt(sb, INIT_INODE_TABLE))
			err = ext4_register_li_request(sb, o_group);

resizefs_out:
		ext4_resize_end(sb);
		return err;
	}

	case FITRIM:
	{
		struct request_queue *q = bdev_get_queue(sb->s_bdev);
		struct fstrim_range range;
		int ret = 0;

		if (!capable(CAP_SYS_ADMIN))
			return -EPERM;

		if (!blk_queue_discard(q))
			return -EOPNOTSUPP;

		if (copy_from_user(&range, (struct fstrim_range __user *)arg,
		    sizeof(range)))
			return -EFAULT;

		range.minlen = max((unsigned int)range.minlen,
				   q->limits.discard_granularity);
		ret = ext4_trim_fs(sb, &range);
		if (ret < 0)
			return ret;

		if (copy_to_user((struct fstrim_range __user *)arg, &range,
		    sizeof(range)))
			return -EFAULT;

		return 0;
	}
	case EXT4_IOC_PRECACHE_EXTENTS:
		return ext4_ext_precache(inode);

	case EXT4_IOC_SET_ENCRYPTION_POLICY:
		if (!ext4_has_feature_encrypt(sb))
			return -EOPNOTSUPP;
		return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);

	case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
#ifdef CONFIG_EXT4_FS_ENCRYPTION
		int err, err2;
		struct ext4_sb_info *sbi = EXT4_SB(sb);
		handle_t *handle;

		if (!ext4_has_feature_encrypt(sb))
			return -EOPNOTSUPP;
		if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) {
			err = mnt_want_write_file(filp);
			if (err)
				return err;
			handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1);
			if (IS_ERR(handle)) {
				err = PTR_ERR(handle);
				goto pwsalt_err_exit;
			}
			err = ext4_journal_get_write_access(handle, sbi->s_sbh);
			if (err)
				goto pwsalt_err_journal;
			generate_random_uuid(sbi->s_es->s_encrypt_pw_salt);
			err = ext4_handle_dirty_metadata(handle, NULL,
							 sbi->s_sbh);
		pwsalt_err_journal:
			err2 = ext4_journal_stop(handle);
			if (err2 && !err)
				err = err2;
		pwsalt_err_exit:
			mnt_drop_write_file(filp);
			if (err)
				return err;
		}
		if (copy_to_user((void __user *) arg,
				 sbi->s_es->s_encrypt_pw_salt, 16))
			return -EFAULT;
		return 0;
#else
		return -EOPNOTSUPP;
#endif
	}
	case EXT4_IOC_GET_ENCRYPTION_POLICY:
		return fscrypt_ioctl_get_policy(filp, (void __user *)arg);

	case EXT4_IOC_FSGETXATTR:
	{
		struct fsxattr fa;

		memset(&fa, 0, sizeof(struct fsxattr));
		fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);

		if (ext4_has_feature_project(inode->i_sb)) {
			fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
				EXT4_I(inode)->i_projid);
		}

		if (copy_to_user((struct fsxattr __user *)arg,
				 &fa, sizeof(fa)))
			return -EFAULT;
		return 0;
	}
	case EXT4_IOC_FSSETXATTR:
	{
		struct fsxattr fa;
		int err;

		if (copy_from_user(&fa, (struct fsxattr __user *)arg,
				   sizeof(fa)))
			return -EFAULT;

		/* Make sure caller has proper permission */
		if (!inode_owner_or_capable(inode))
			return -EACCES;

		if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS)
			return -EOPNOTSUPP;

		flags = ext4_xflags_to_iflags(fa.fsx_xflags);
		if (ext4_mask_flags(inode->i_mode, flags) != flags)
			return -EOPNOTSUPP;

		err = mnt_want_write_file(filp);
		if (err)
			return err;

		inode_lock(inode);
		flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
			 (flags & EXT4_FL_XFLAG_VISIBLE);
		err = ext4_ioctl_setflags(inode, flags);
		inode_unlock(inode);
		mnt_drop_write_file(filp);
		if (err)
			return err;

		err = ext4_ioctl_setproject(filp, fa.fsx_projid);
		if (err)
			return err;

		return 0;
	}
	case EXT4_IOC_SHUTDOWN:
		return ext4_shutdown(sb, arg);
	default:
		return -ENOTTY;
	}
}
Ejemplo n.º 8
0
inline std::string generate_random_uuid_str(CassUuidGen* uuid_gen) {
  return string_from_uuid(generate_random_uuid(uuid_gen));
}
Ejemplo n.º 9
0
/*
 * Initialise an AFS network namespace record.
 */
static int __net_init afs_net_init(struct afs_net *net)
{
	struct afs_sysnames *sysnames;
	int ret;

	net->live = true;
	generate_random_uuid((unsigned char *)&net->uuid);

	INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
	mutex_init(&net->socket_mutex);

	net->cells = RB_ROOT;
	seqlock_init(&net->cells_lock);
	INIT_WORK(&net->cells_manager, afs_manage_cells);
	timer_setup(&net->cells_timer, afs_cells_timer, 0);

	spin_lock_init(&net->proc_cells_lock);
	INIT_LIST_HEAD(&net->proc_cells);

	seqlock_init(&net->fs_lock);
	net->fs_servers = RB_ROOT;
	INIT_LIST_HEAD(&net->fs_updates);
	INIT_HLIST_HEAD(&net->fs_proc);

	INIT_HLIST_HEAD(&net->fs_addresses4);
	INIT_HLIST_HEAD(&net->fs_addresses6);
	seqlock_init(&net->fs_addr_lock);

	INIT_WORK(&net->fs_manager, afs_manage_servers);
	timer_setup(&net->fs_timer, afs_servers_timer, 0);

	ret = -ENOMEM;
	sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
	if (!sysnames)
		goto error_sysnames;
	sysnames->subs[0] = (char *)&afs_init_sysname;
	sysnames->nr = 1;
	refcount_set(&sysnames->usage, 1);
	net->sysnames = sysnames;
	rwlock_init(&net->sysnames_lock);

	/* Register the /proc stuff */
	ret = afs_proc_init(net);
	if (ret < 0)
		goto error_proc;

	/* Initialise the cell DB */
	ret = afs_cell_init(net, rootcell);
	if (ret < 0)
		goto error_cell_init;

	/* Create the RxRPC transport */
	ret = afs_open_socket(net);
	if (ret < 0)
		goto error_open_socket;

	return 0;

error_open_socket:
	net->live = false;
	afs_cell_purge(net);
	afs_purge_servers(net);
error_cell_init:
	net->live = false;
	afs_proc_cleanup(net);
error_proc:
	afs_put_sysnames(net->sysnames);
error_sysnames:
	net->live = false;
	return ret;
}