/**
* Implementation of dt_index_operations::dio_it.rec
*
* Get the record at current iterator position. These iteration methods
* (dio_it) will only be used for iterating the remote directory, so it
* uses lu_dirent_calc_size() to calculate the record size.
*
* \param[in] env execution environment
* \param[in] di iterator of this iteration
* \param[out] rec the record to be returned
* \param[in] attr attributes of the index object, so it knows
* how to pack the entry.
*
* \retval only return 0 for now
*/
static int osp_md_index_it_rec(const struct lu_env *env, const struct dt_it *di,
struct dt_rec *rec, __u32 attr)
{
struct osp_it *it = (struct osp_it *)di;
struct lu_dirent *ent = (struct lu_dirent *)it->ooi_ent;
size_t reclen;
reclen = lu_dirent_calc_size(le16_to_cpu(ent->lde_namelen), attr);
memcpy(rec, ent, reclen);
return 0;
}
static int osd_zap_it_rec(const struct lu_env *env, const struct dt_it *di,
struct dt_rec *dtrec, __u32 attr)
{
struct luz_direntry *zde = &osd_oti_get(env)->oti_zde;
zap_attribute_t *za = &osd_oti_get(env)->oti_za;
struct osd_zap_it *it = (struct osd_zap_it *)di;
struct lu_dirent *lde = (struct lu_dirent *)dtrec;
int rc, namelen;
ENTRY;
it->ozi_reset = 0;
LASSERT(lde);
lde->lde_hash = cpu_to_le64(udmu_zap_cursor_serialize(it->ozi_zc));
if ((rc = -zap_cursor_retrieve(it->ozi_zc, za)))
GOTO(out, rc);
namelen = strlen(za->za_name);
if (namelen > NAME_MAX)
GOTO(out, rc = -EOVERFLOW);
strcpy(lde->lde_name, za->za_name);
lde->lde_namelen = cpu_to_le16(namelen);
if (za->za_integer_length != 8 || za->za_num_integers < 3) {
CERROR("%s: unsupported direntry format: %d %d\n",
osd_obj2dev(it->ozi_obj)->od_svname,
za->za_integer_length, (int)za->za_num_integers);
GOTO(out, rc = -EIO);
}
rc = -zap_lookup(it->ozi_zc->zc_objset, it->ozi_zc->zc_zapobj,
za->za_name, za->za_integer_length, 3, zde);
if (rc)
GOTO(out, rc);
lde->lde_fid = zde->lzd_fid;
lde->lde_attrs = LUDA_FID;
/* append lustre attributes */
osd_it_append_attrs(lde, attr, namelen, zde->lzd_reg.zde_type);
lde->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
out:
RETURN(rc);
}
static int mdd_fix_children(const struct lu_env *env,
struct mdd_device *mdd,
struct dt_object *o)
{
struct mdd_thread_info *info = mdd_env_info(env);
const struct dt_it_ops *iops;
struct lu_name name;
struct dt_it *it;
struct lu_dirent *ent;
int rc;
ENTRY;
/* scan /ROOT and update all ".." and linkEAs */
ent = (struct lu_dirent *)&info->mti_xattr_buf;
iops = &o->do_index_ops->dio_it;
it = iops->init(env, o, LUDA_64BITHASH, BYPASS_CAPA);
if (IS_ERR(it)) {
rc = PTR_ERR(it);
CERROR("%s: can't initialize the iterator: rc = %d\n",
mdd2obd_dev(mdd)->obd_name, rc);
GOTO(out, rc);
}
rc = iops->load(env, it, 0);
if (rc <= 0)
GOTO(out_put, rc);
do {
rc = iops->key_size(env, it);
if (rc == 0)
goto next;
/* calculate max space required for lu_dirent */
rc = lu_dirent_calc_size(rc, 0);
LASSERT(rc <= sizeof(info->mti_xattr_buf));
rc = iops->rec(env, it, (struct dt_rec *)ent, LUDA_TYPE);
if (rc == 0) {
CDEBUG(D_OTHER, "convert %*s -> "DFID"\n",
ent->lde_namelen, ent->lde_name,
PFID(&ent->lde_fid));
name.ln_namelen = ent->lde_namelen;
name.ln_name = ent->lde_name;
rc = mdd_convert_object(env, mdd, &ent->lde_fid, &name);
if (rc) {
CERROR("%s: can't convert "DFID": rc = %d\n",
mdd2obd_dev(mdd)->obd_name,
PFID(&ent->lde_fid), rc);
break;
}
}
next:
rc = iops->next(env, it);
} while (rc == 0);
if (rc > 0)
rc = 0;
out_put:
iops->put(env, it);
iops->fini(env, it);
out:
RETURN(rc);
}
static int osd_dir_it_rec(const struct lu_env *env, const struct dt_it *di,
struct dt_rec *dtrec, __u32 attr)
{
struct osd_zap_it *it = (struct osd_zap_it *)di;
struct lu_dirent *lde = (struct lu_dirent *)dtrec;
struct luz_direntry *zde = &osd_oti_get(env)->oti_zde;
zap_attribute_t *za = &osd_oti_get(env)->oti_za;
int rc, namelen;
ENTRY;
if (it->ozi_pos <= 1) {
lde->lde_hash = cpu_to_le64(1);
strcpy(lde->lde_name, ".");
lde->lde_namelen = cpu_to_le16(1);
lde->lde_fid = *lu_object_fid(&it->ozi_obj->oo_dt.do_lu);
lde->lde_attrs = LUDA_FID;
/* append lustre attributes */
osd_it_append_attrs(lde, attr, 1, IFTODT(S_IFDIR));
lde->lde_reclen = cpu_to_le16(lu_dirent_calc_size(1, attr));
it->ozi_pos = 1;
GOTO(out, rc = 0);
} else if (it->ozi_pos == 2) {
lde->lde_hash = cpu_to_le64(2);
strcpy(lde->lde_name, "..");
lde->lde_namelen = cpu_to_le16(2);
lde->lde_attrs = LUDA_FID;
/* append lustre attributes */
osd_it_append_attrs(lde, attr, 2, IFTODT(S_IFDIR));
lde->lde_reclen = cpu_to_le16(lu_dirent_calc_size(2, attr));
rc = osd_find_parent_fid(env, &it->ozi_obj->oo_dt, &lde->lde_fid);
/*
* early Orion code was not setting LinkEA, so it's possible
* some setups still have objects with no LinkEA set.
* but at that time .. was a real record in the directory
* so we should try to lookup .. in ZAP
*/
if (rc != -ENOENT)
GOTO(out, rc);
}
LASSERT(lde);
rc = -zap_cursor_retrieve(it->ozi_zc, za);
if (unlikely(rc != 0))
GOTO(out, rc);
lde->lde_hash = cpu_to_le64(udmu_zap_cursor_serialize(it->ozi_zc));
namelen = strlen(za->za_name);
if (namelen > NAME_MAX)
GOTO(out, rc = -EOVERFLOW);
strcpy(lde->lde_name, za->za_name);
lde->lde_namelen = cpu_to_le16(namelen);
if (za->za_integer_length != 8 || za->za_num_integers < 3) {
CERROR("%s: unsupported direntry format: %d %d\n",
osd_obj2dev(it->ozi_obj)->od_svname,
za->za_integer_length, (int)za->za_num_integers);
GOTO(out, rc = -EIO);
}
rc = -zap_lookup(it->ozi_zc->zc_objset, it->ozi_zc->zc_zapobj,
za->za_name, za->za_integer_length, 3, zde);
if (rc)
GOTO(out, rc);
lde->lde_fid = zde->lzd_fid;
lde->lde_attrs = LUDA_FID;
/* append lustre attributes */
osd_it_append_attrs(lde, attr, namelen, zde->lzd_reg.zde_type);
lde->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
out:
RETURN(rc);
}
