C++ (Cpp) ocfs2_reserve_cluster_bitmap_bits示例

示例#1

文件： suballoc.c 项目： 3sOx/asuswrt-merlin

/* Callers don't need to care which bitmap (local alloc or main) to
 * use so we figure it out for them, but unfortunately this clutters
 * things a bit. */
int ocfs2_reserve_clusters(struct ocfs2_super *osb,
			   u32 bits_wanted,
			   struct ocfs2_alloc_context **ac)
{
	int status;

	mlog_entry_void();

	*ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
	if (!(*ac)) {
		status = -ENOMEM;
		mlog_errno(status);
		goto bail;
	}

	(*ac)->ac_bits_wanted = bits_wanted;

	status = -ENOSPC;
	if (ocfs2_alloc_should_use_local(osb, bits_wanted)) {
		status = ocfs2_reserve_local_alloc_bits(osb,
							bits_wanted,
							*ac);
		if ((status < 0) && (status != -ENOSPC)) {
			mlog_errno(status);
			goto bail;
		} else if (status == -ENOSPC) {
			/* reserve_local_bits will return enospc with
			 * the local alloc inode still locked, so we
			 * can change this safely here. */
			mlog(0, "Disabling local alloc\n");
			/* We set to OCFS2_LA_DISABLED so that umount
			 * can clean up what's left of the local
			 * allocation */
			osb->local_alloc_state = OCFS2_LA_DISABLED;
		}
	}

	if (status == -ENOSPC) {
		status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac);
		if (status < 0) {
			if (status != -ENOSPC)
				mlog_errno(status);
			goto bail;
		}
	}

	status = 0;
bail:
	if ((status < 0) && *ac) {
		ocfs2_free_alloc_context(*ac);
		*ac = NULL;
	}

	mlog_exit(status);
	return status;
}

示例#2

文件： suballoc.c 项目： joka90/htc-kernel-msm7227

/* Callers don't need to care which bitmap (local alloc or main) to
 * use so we figure it out for them, but unfortunately this clutters
 * things a bit. */
static int ocfs2_reserve_clusters_with_limit(struct ocfs2_super *osb,
					     u32 bits_wanted, u64 max_block,
					     int flags,
					     struct ocfs2_alloc_context **ac)
{
	int status;

	mlog_entry_void();

	*ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
	if (!(*ac)) {
		status = -ENOMEM;
		mlog_errno(status);
		goto bail;
	}

	(*ac)->ac_bits_wanted = bits_wanted;
	(*ac)->ac_max_block = max_block;

	status = -ENOSPC;
	if (!(flags & ALLOC_GROUPS_FROM_GLOBAL) &&
	    ocfs2_alloc_should_use_local(osb, bits_wanted)) {
		status = ocfs2_reserve_local_alloc_bits(osb,
							bits_wanted,
							*ac);
		if (status == -EFBIG) {
			/* The local alloc window is outside ac_max_block.
			 * use the main bitmap. */
			status = -ENOSPC;
		} else if ((status < 0) && (status != -ENOSPC)) {
			mlog_errno(status);
			goto bail;
		}
	}

	if (status == -ENOSPC) {
		status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac);
		if (status < 0) {
			if (status != -ENOSPC)
				mlog_errno(status);
			goto bail;
		}
	}

	status = 0;
bail:
	if ((status < 0) && *ac) {
		ocfs2_free_alloc_context(*ac);
		*ac = NULL;
	}

	mlog_exit(status);
	return status;
}

示例#3

文件： localalloc.c 项目： jameshilliard/actiontec_opensrc_mi424wr-rev-e-f_fw-20-10-7-5

static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb,
						struct ocfs2_journal_handle *handle,
						struct ocfs2_alloc_context **ac,
						struct inode **bitmap_inode,
						struct buffer_head **bitmap_bh)
{
	int status;

	*ac = kcalloc(1, sizeof(struct ocfs2_alloc_context), GFP_KERNEL);
	if (!(*ac)) {
		status = -ENOMEM;
		mlog_errno(status);
		goto bail;
	}

	(*ac)->ac_handle = handle;
	(*ac)->ac_bits_wanted = ocfs2_local_alloc_window_bits(osb);

	status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac);
	if (status < 0) {
		if (status != -ENOSPC)
			mlog_errno(status);
		goto bail;
	}

	*bitmap_inode = (*ac)->ac_inode;
	igrab(*bitmap_inode);
	*bitmap_bh = (*ac)->ac_bh;
	get_bh(*bitmap_bh);
	status = 0;
bail:
	if ((status < 0) && *ac) {
		ocfs2_free_alloc_context(*ac);
		*ac = NULL;
	}

	mlog_exit(status);
	return status;
}