Ejemplo n.º 1
0
/*
 * Helpers to fill in size, ctime, mtime, and atime.  We have to be
 * careful because either the client or MDS may have more up to date
 * info, depending on which capabilities are held, and whether
 * time_warp_seq or truncate_seq have increased.  (Ordinarily, mtime
 * and size are monotonically increasing, except when utimes() or
 * truncate() increments the corresponding _seq values.)
 */
int ceph_fill_file_size(struct inode *inode, int issued,
			u32 truncate_seq, u64 truncate_size, u64 size)
{
	struct ceph_inode_info *ci = ceph_inode(inode);
	int queue_trunc = 0;

	if (ceph_seq_cmp(truncate_seq, ci->i_truncate_seq) > 0 ||
	    (truncate_seq == ci->i_truncate_seq && size > inode->i_size)) {
		dout("size %lld -> %llu\n", inode->i_size, size);
		inode->i_size = size;
		inode->i_blocks = (size + (1<<9) - 1) >> 9;
		ci->i_reported_size = size;
		if (truncate_seq != ci->i_truncate_seq) {
			dout("truncate_seq %u -> %u\n",
			     ci->i_truncate_seq, truncate_seq);
			ci->i_truncate_seq = truncate_seq;
			/*
			 * If we hold relevant caps, or in the case where we're
			 * not the only client referencing this file and we
			 * don't hold those caps, then we need to check whether
			 * the file is either opened or mmaped
			 */
			if ((issued & (CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_RD|
				       CEPH_CAP_FILE_WR|CEPH_CAP_FILE_BUFFER|
				       CEPH_CAP_FILE_EXCL|
				       CEPH_CAP_FILE_LAZYIO)) ||
			    mapping_mapped(inode->i_mapping) ||
			    __ceph_caps_file_wanted(ci)) {
				ci->i_truncate_pending++;
				queue_trunc = 1;
			}
		}
	}
Ejemplo n.º 2
0
/*
 * try renew caps after session gets killed.
 */
int ceph_renew_caps(struct inode *inode)
{
	struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
	struct ceph_inode_info *ci = ceph_inode(inode);
	struct ceph_mds_request *req;
	int err, flags, wanted;

	spin_lock(&ci->i_ceph_lock);
	wanted = __ceph_caps_file_wanted(ci);
	if (__ceph_is_any_real_caps(ci) &&
	    (!(wanted & CEPH_CAP_ANY_WR) == 0 || ci->i_auth_cap)) {
		int issued = __ceph_caps_issued(ci, NULL);
		spin_unlock(&ci->i_ceph_lock);
		dout("renew caps %p want %s issued %s updating mds_wanted\n",
		     inode, ceph_cap_string(wanted), ceph_cap_string(issued));
		ceph_check_caps(ci, 0, NULL);
		return 0;
	}
	spin_unlock(&ci->i_ceph_lock);

	flags = 0;
	if ((wanted & CEPH_CAP_FILE_RD) && (wanted & CEPH_CAP_FILE_WR))
		flags = O_RDWR;
	else if (wanted & CEPH_CAP_FILE_RD)
		flags = O_RDONLY;
	else if (wanted & CEPH_CAP_FILE_WR)
		flags = O_WRONLY;
#ifdef O_LAZY
	if (wanted & CEPH_CAP_FILE_LAZYIO)
		flags |= O_LAZY;
#endif

	req = prepare_open_request(inode->i_sb, flags, 0);
	if (IS_ERR(req)) {
		err = PTR_ERR(req);
		goto out;
	}

	req->r_inode = inode;
	ihold(inode);
	req->r_num_caps = 1;
	req->r_fmode = -1;

	err = ceph_mdsc_do_request(mdsc, NULL, req);
	ceph_mdsc_put_request(req);
out:
	dout("renew caps %p open result=%d\n", inode, err);
	return err < 0 ? err : 0;
}