/*
* Helper function looking up & creating if not found an index file with a
* dynamic fid.
*/
static struct dt_object *
lquota_disk_find_create(const struct lu_env *env, struct dt_device *dev,
struct dt_object *parent, struct lu_fid *fid,
const struct dt_index_features *idx_feat,
char *name)
{
struct lquota_thread_info *qti = lquota_info(env);
struct dt_object *obj;
struct local_oid_storage *los;
int rc;
ENTRY;
/* Set up local storage */
rc = local_oid_storage_init(env, dev, fid, &los);
if (rc)
RETURN(ERR_PTR(rc));
/* lookup/create slave index file */
obj = local_index_find_or_create(env, los, parent, name, LQUOTA_MODE,
idx_feat);
if (IS_ERR(obj))
GOTO(out, obj);
/* local_oid_storage_fini() will finalize the local storage device,
* we have to open the object in another device stack */
qti->qti_fid = obj->do_lu.lo_header->loh_fid;
lu_object_put_nocache(env, &obj->do_lu);
obj = dt_locate(env, dev, &qti->qti_fid);
if (IS_ERR(obj))
GOTO(out, obj);
out:
local_oid_storage_fini(env, los);
RETURN(obj);
}
int mdd_local_file_create(const struct lu_env *env, struct mdd_device *mdd,
const struct lu_fid *pfid, const char *name, __u32 mode,
struct lu_fid *fid)
{
struct dt_object *parent, *dto;
int rc;
ENTRY;
LASSERT(!fid_is_zero(pfid));
parent = dt_locate(env, mdd->mdd_bottom, pfid);
if (unlikely(IS_ERR(parent)))
RETURN(PTR_ERR(parent));
/* create local file/dir, if @fid is passed then try to use it */
if (fid_is_zero(fid))
dto = local_file_find_or_create(env, mdd->mdd_los, parent,
name, mode);
else
dto = local_file_find_or_create_with_fid(env, mdd->mdd_bottom,
fid, parent, name,
mode);
if (IS_ERR(dto))
GOTO(out_put, rc = PTR_ERR(dto));
*fid = *lu_object_fid(&dto->do_lu);
/* since stack is not fully set up the local_storage uses own stack
* and we should drop its object from cache */
lu_object_put_nocache(env, &dto->do_lu);
EXIT;
out_put:
lu_object_put(env, &parent->do_lu);
return 0;
}
/*
* Set up quota directory (either "quota_master" or "quota_slave") for a QMT or
* QSD instance. This function is also used to create per-pool directory on
* the quota master.
* The directory is created with a local sequence if it does not exist already.
* This function is called at ->ldo_prepare time when the full device stack is
* configured.
*
* \param env - is the environment passed by the caller
* \param dev - is the dt_device where to create the quota directory
* \param parent - is the parent directory. If not specified, the directory
* will be created under the root directory
* \param name - is the name of quota directory to be created
*
* \retval - pointer to quota root dt_object on success, appropriate error
* on failure
*/
struct dt_object *lquota_disk_dir_find_create(const struct lu_env *env,
struct dt_device *dev,
struct dt_object *parent,
const char *name)
{
struct lquota_thread_info *qti = lquota_info(env);
struct dt_object *qt_dir = NULL;
struct local_oid_storage *los = NULL;
int rc;
ENTRY;
/* Set up local storage to create the quota directory.
* We use the sequence reserved for local named objects */
lu_local_name_obj_fid(&qti->qti_fid, 1);
rc = local_oid_storage_init(env, dev, &qti->qti_fid, &los);
if (rc)
RETURN(ERR_PTR(rc));
if (parent == NULL) {
/* Fetch dt object associated with root directory */
rc = dt_root_get(env, dev, &qti->qti_fid);
if (rc)
GOTO(out, rc);
parent = dt_locate_at(env, dev, &qti->qti_fid,
dev->dd_lu_dev.ld_site->ls_top_dev, NULL);
if (IS_ERR(parent))
GOTO(out, rc = PTR_ERR(parent));
} else {
lu_object_get(&parent->do_lu);
}
/* create quota directory to be used for all quota index files */
qt_dir = local_file_find_or_create(env, los, parent, name, S_IFDIR |
S_IRUGO | S_IWUSR | S_IXUGO);
if (IS_ERR(qt_dir))
GOTO(out, rc = PTR_ERR(qt_dir));
/* local_oid_storage_fini() will finalize the local storage device,
* we have to open the object in another device stack */
qti->qti_fid = qt_dir->do_lu.lo_header->loh_fid;
lu_object_put_nocache(env, &qt_dir->do_lu);
qt_dir = dt_locate(env, dev, &qti->qti_fid);
if (IS_ERR(qt_dir))
GOTO(out, rc = PTR_ERR(qt_dir));
if (!dt_try_as_dir(env, qt_dir))
GOTO(out, rc = -ENOTDIR);
EXIT;
out:
if (parent != NULL && !IS_ERR(parent))
lu_object_put(env, &parent->do_lu);
if (los != NULL)
local_oid_storage_fini(env, los);
if (rc) {
if (qt_dir != NULL && !IS_ERR(qt_dir))
lu_object_put(env, &qt_dir->do_lu);
qt_dir = ERR_PTR(rc);
}
return qt_dir;
}
