Esempio n. 1
0
static struct buffer_head *
ocfs2_block_group_alloc_contig(struct ocfs2_super *osb, handle_t *handle,
			       struct inode *alloc_inode,
			       struct ocfs2_alloc_context *ac,
			       struct ocfs2_chain_list *cl)
{
	int status;
	u32 bit_off, num_bits;
	u64 bg_blkno;
	struct buffer_head *bg_bh;
	unsigned int alloc_rec = ocfs2_find_smallest_chain(cl);

	status = ocfs2_claim_clusters(handle, ac,
				      le16_to_cpu(cl->cl_cpg), &bit_off,
				      &num_bits);
	if (status < 0) {
		if (status != -ENOSPC)
			mlog_errno(status);
		goto bail;
	}

	/* setup the group */
	bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off);
	trace_ocfs2_block_group_alloc_contig(
	     (unsigned long long)bg_blkno, alloc_rec);

	bg_bh = sb_getblk(osb->sb, bg_blkno);
	if (!bg_bh) {
		status = -EIO;
		mlog_errno(status);
		goto bail;
	}
	ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh);

	status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh,
					bg_blkno, num_bits, alloc_rec, cl);
	if (status < 0) {
		brelse(bg_bh);
		mlog_errno(status);
	}

bail:
	return status ? ERR_PTR(status) : bg_bh;
}
/* Add a new group descriptor to global_bitmap. */
int ocfs2_group_add(struct inode *inode, struct ocfs2_new_group_input *input)
{
	int ret;
	handle_t *handle;
	struct buffer_head *main_bm_bh = NULL;
	struct inode *main_bm_inode = NULL;
	struct ocfs2_dinode *fe = NULL;
	struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
	struct buffer_head *group_bh = NULL;
	struct ocfs2_group_desc *group = NULL;
	struct ocfs2_chain_list *cl;
	struct ocfs2_chain_rec *cr;
	u16 cl_bpc;

	if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
		return -EROFS;

	main_bm_inode = ocfs2_get_system_file_inode(osb,
						    GLOBAL_BITMAP_SYSTEM_INODE,
						    OCFS2_INVALID_SLOT);
	if (!main_bm_inode) {
		ret = -EINVAL;
		mlog_errno(ret);
		goto out;
	}

	mutex_lock(&main_bm_inode->i_mutex);

	ret = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1);
	if (ret < 0) {
		mlog_errno(ret);
		goto out_mutex;
	}

	fe = (struct ocfs2_dinode *)main_bm_bh->b_data;

	if (le16_to_cpu(fe->id2.i_chain.cl_cpg) !=
		ocfs2_group_bitmap_size(osb->sb, 0,
					osb->s_feature_incompat) * 8) {
		mlog(ML_ERROR, "The disk is too old and small."
		     " Force to do offline resize.");
		ret = -EINVAL;
		goto out_unlock;
	}

	ret = ocfs2_read_blocks_sync(osb, input->group, 1, &group_bh);
	if (ret < 0) {
		mlog(ML_ERROR, "Can't read the group descriptor # %llu "
		     "from the device.", (unsigned long long)input->group);
		goto out_unlock;
	}

	ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), group_bh);

	ret = ocfs2_verify_group_and_input(main_bm_inode, fe, input, group_bh);
	if (ret) {
		mlog_errno(ret);
		goto out_unlock;
	}

	trace_ocfs2_group_add((unsigned long long)input->group,
			       input->chain, input->clusters, input->frees);

	handle = ocfs2_start_trans(osb, OCFS2_GROUP_ADD_CREDITS);
	if (IS_ERR(handle)) {
		mlog_errno(PTR_ERR(handle));
		ret = -EINVAL;
		goto out_unlock;
	}

	cl_bpc = le16_to_cpu(fe->id2.i_chain.cl_bpc);
	cl = &fe->id2.i_chain;
	cr = &cl->cl_recs[input->chain];

	ret = ocfs2_journal_access_gd(handle, INODE_CACHE(main_bm_inode),
				      group_bh, OCFS2_JOURNAL_ACCESS_WRITE);
	if (ret < 0) {
		mlog_errno(ret);
		goto out_commit;
	}

	group = (struct ocfs2_group_desc *)group_bh->b_data;
	group->bg_next_group = cr->c_blkno;
	ocfs2_journal_dirty(handle, group_bh);

	ret = ocfs2_journal_access_di(handle, INODE_CACHE(main_bm_inode),
				      main_bm_bh, OCFS2_JOURNAL_ACCESS_WRITE);
	if (ret < 0) {
		mlog_errno(ret);
		goto out_commit;
	}

	if (input->chain == le16_to_cpu(cl->cl_next_free_rec)) {
		le16_add_cpu(&cl->cl_next_free_rec, 1);
		memset(cr, 0, sizeof(struct ocfs2_chain_rec));
	}

	cr->c_blkno = cpu_to_le64(input->group);
	le32_add_cpu(&cr->c_total, input->clusters * cl_bpc);
	le32_add_cpu(&cr->c_free, input->frees * cl_bpc);

	le32_add_cpu(&fe->id1.bitmap1.i_total, input->clusters *cl_bpc);
	le32_add_cpu(&fe->id1.bitmap1.i_used,
		     (input->clusters - input->frees) * cl_bpc);
	le32_add_cpu(&fe->i_clusters, input->clusters);

	ocfs2_journal_dirty(handle, main_bm_bh);

	spin_lock(&OCFS2_I(main_bm_inode)->ip_lock);
	OCFS2_I(main_bm_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
	le64_add_cpu(&fe->i_size, input->clusters << osb->s_clustersize_bits);
	spin_unlock(&OCFS2_I(main_bm_inode)->ip_lock);
	i_size_write(main_bm_inode, le64_to_cpu(fe->i_size));

	ocfs2_update_super_and_backups(main_bm_inode, input->clusters);

out_commit:
	ocfs2_commit_trans(osb, handle);
out_unlock:
	brelse(group_bh);
	brelse(main_bm_bh);

	ocfs2_inode_unlock(main_bm_inode, 1);

out_mutex:
	mutex_unlock(&main_bm_inode->i_mutex);
	iput(main_bm_inode);

out:
	return ret;
}
Esempio n. 3
0
static struct buffer_head *
ocfs2_block_group_alloc_discontig(handle_t *handle,
				  struct inode *alloc_inode,
				  struct ocfs2_alloc_context *ac,
				  struct ocfs2_chain_list *cl)
{
	int status;
	u32 bit_off, num_bits;
	u64 bg_blkno;
	unsigned int min_bits = le16_to_cpu(cl->cl_cpg) >> 1;
	struct buffer_head *bg_bh = NULL;
	unsigned int alloc_rec = ocfs2_find_smallest_chain(cl);
	struct ocfs2_super *osb = OCFS2_SB(alloc_inode->i_sb);

	if (!ocfs2_supports_discontig_bg(osb)) {
		status = -ENOSPC;
		goto bail;
	}

	status = ocfs2_extend_trans(handle,
				    ocfs2_calc_bg_discontig_credits(osb->sb));
	if (status) {
		mlog_errno(status);
		goto bail;
	}

	/*
	 * We're going to be grabbing from multiple cluster groups.
	 * We don't have enough credits to relink them all, and the
	 * cluster groups will be staying in cache for the duration of
	 * this operation.
	 */
	ac->ac_allow_chain_relink = 0;

	/* Claim the first region */
	status = ocfs2_block_group_claim_bits(osb, handle, ac, min_bits,
					      &bit_off, &num_bits);
	if (status < 0) {
		if (status != -ENOSPC)
			mlog_errno(status);
		goto bail;
	}
	min_bits = num_bits;

	/* setup the group */
	bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off);
	trace_ocfs2_block_group_alloc_discontig(
				(unsigned long long)bg_blkno, alloc_rec);

	bg_bh = sb_getblk(osb->sb, bg_blkno);
	if (!bg_bh) {
		status = -EIO;
		mlog_errno(status);
		goto bail;
	}
	ocfs2_set_new_buffer_uptodate(INODE_CACHE(alloc_inode), bg_bh);

	status = ocfs2_block_group_fill(handle, alloc_inode, bg_bh,
					bg_blkno, num_bits, alloc_rec, cl);
	if (status < 0) {
		mlog_errno(status);
		goto bail;
	}

	status = ocfs2_block_group_grow_discontig(handle, alloc_inode,
						  bg_bh, ac, cl, min_bits);
	if (status)
		mlog_errno(status);

bail:
	if (status)
		ocfs2_bg_alloc_cleanup(handle, ac, alloc_inode, bg_bh);
	return status ? ERR_PTR(status) : bg_bh;
}
Esempio n. 4
0
/*
 * We expect the block group allocator to already be locked.
 */
static int ocfs2_block_group_alloc(struct ocfs2_super *osb,
				   struct inode *alloc_inode,
				   struct buffer_head *bh)
{
	int status, credits;
	struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
	struct ocfs2_chain_list *cl;
	struct ocfs2_alloc_context *ac = NULL;
	handle_t *handle = NULL;
	u32 bit_off, num_bits;
	u16 alloc_rec;
	u64 bg_blkno;
	struct buffer_head *bg_bh = NULL;
	struct ocfs2_group_desc *bg;

	BUG_ON(ocfs2_is_cluster_bitmap(alloc_inode));

	mlog_entry_void();

	cl = &fe->id2.i_chain;
	status = ocfs2_reserve_clusters(osb,
					le16_to_cpu(cl->cl_cpg),
					&ac);
	if (status < 0) {
		if (status != -ENOSPC)
			mlog_errno(status);
		goto bail;
	}

	credits = ocfs2_calc_group_alloc_credits(osb->sb,
						 le16_to_cpu(cl->cl_cpg));
	handle = ocfs2_start_trans(osb, credits);
	if (IS_ERR(handle)) {
		status = PTR_ERR(handle);
		handle = NULL;
		mlog_errno(status);
		goto bail;
	}

	status = ocfs2_claim_clusters(osb,
				      handle,
				      ac,
				      le16_to_cpu(cl->cl_cpg),
				      &bit_off,
				      &num_bits);
	if (status < 0) {
		if (status != -ENOSPC)
			mlog_errno(status);
		goto bail;
	}

	alloc_rec = ocfs2_find_smallest_chain(cl);

	/* setup the group */
	bg_blkno = ocfs2_clusters_to_blocks(osb->sb, bit_off);
	mlog(0, "new descriptor, record %u, at block %llu\n",
	     alloc_rec, (unsigned long long)bg_blkno);

	bg_bh = sb_getblk(osb->sb, bg_blkno);
	if (!bg_bh) {
		status = -EIO;
		mlog_errno(status);
		goto bail;
	}
	ocfs2_set_new_buffer_uptodate(alloc_inode, bg_bh);

	status = ocfs2_block_group_fill(handle,
					alloc_inode,
					bg_bh,
					bg_blkno,
					alloc_rec,
					cl);
	if (status < 0) {
		mlog_errno(status);
		goto bail;
	}

	bg = (struct ocfs2_group_desc *) bg_bh->b_data;

	status = ocfs2_journal_access(handle, alloc_inode,
				      bh, OCFS2_JOURNAL_ACCESS_WRITE);
	if (status < 0) {
		mlog_errno(status);
		goto bail;
	}

	le32_add_cpu(&cl->cl_recs[alloc_rec].c_free,
		     le16_to_cpu(bg->bg_free_bits_count));
	le32_add_cpu(&cl->cl_recs[alloc_rec].c_total, le16_to_cpu(bg->bg_bits));
	cl->cl_recs[alloc_rec].c_blkno  = cpu_to_le64(bg_blkno);
	if (le16_to_cpu(cl->cl_next_free_rec) < le16_to_cpu(cl->cl_count))
		le16_add_cpu(&cl->cl_next_free_rec, 1);

	le32_add_cpu(&fe->id1.bitmap1.i_used, le16_to_cpu(bg->bg_bits) -
					le16_to_cpu(bg->bg_free_bits_count));
	le32_add_cpu(&fe->id1.bitmap1.i_total, le16_to_cpu(bg->bg_bits));
	le32_add_cpu(&fe->i_clusters, le16_to_cpu(cl->cl_cpg));

	status = ocfs2_journal_dirty(handle, bh);
	if (status < 0) {
		mlog_errno(status);
		goto bail;
	}

	spin_lock(&OCFS2_I(alloc_inode)->ip_lock);
	OCFS2_I(alloc_inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
	fe->i_size = cpu_to_le64(ocfs2_clusters_to_bytes(alloc_inode->i_sb,
					     le32_to_cpu(fe->i_clusters)));
	spin_unlock(&OCFS2_I(alloc_inode)->ip_lock);
	i_size_write(alloc_inode, le64_to_cpu(fe->i_size));
	alloc_inode->i_blocks = ocfs2_inode_sector_count(alloc_inode);

	status = 0;
bail:
	if (handle)
		ocfs2_commit_trans(osb, handle);

	if (ac)
		ocfs2_free_alloc_context(ac);

	if (bg_bh)
		brelse(bg_bh);

	mlog_exit(status);
	return status;
}