/*
* Look-up/create a global index file.
*
* \param env - is the environment passed by the caller
* \parap dev - is the dt_device where to lookup/create the global index file
* \param parent - is the parent directory where to create the global index if
* not found
* \param fid - is the fid of the global index to be looked up/created
* \parap local - indicates whether the index should be created with a local
* generated fid or with \fid
*
* \retval - pointer to the dt_object of the global index on success,
* appropriate error on failure
*/
struct dt_object *lquota_disk_glb_find_create(const struct lu_env *env,
struct dt_device *dev,
struct dt_object *parent,
struct lu_fid *fid, bool local)
{
struct lquota_thread_info *qti = lquota_info(env);
struct dt_object *glb_idx;
const struct dt_index_features *idx_feat;
ENTRY;
CDEBUG(D_QUOTA, "look-up/create %sglobal idx file ("DFID")\n",
local ? "local " : "", PFID(fid));
idx_feat = &dt_quota_glb_features;
/* the filename is composed of the most signicant bits of the FID,
* that's to say the oid which encodes the pool id, pool type and quota
* type */
sprintf(qti->qti_buf, "0x%x", fid->f_oid);
if (local) {
/* We use the sequence reserved for local named objects */
lu_local_name_obj_fid(&qti->qti_fid, 1);
glb_idx = lquota_disk_find_create(env, dev, parent,
&qti->qti_fid, idx_feat,
qti->qti_buf);
} else {
/* look-up/create global index on disk */
glb_idx = local_index_find_or_create_with_fid(env, dev, fid,
parent,
qti->qti_buf,
LQUOTA_MODE,
idx_feat);
}
if (IS_ERR(glb_idx)) {
CERROR("%s: failed to look-up/create idx file "DFID" rc:%ld "
"local:%d\n", dev->dd_lu_dev.ld_obd->obd_name,
PFID(fid), PTR_ERR(glb_idx), local);
RETURN(glb_idx);
}
/* install index operation vector */
if (glb_idx->do_index_ops == NULL) {
int rc;
rc = glb_idx->do_ops->do_index_try(env, glb_idx, idx_feat);
if (rc) {
CERROR("%s: failed to setup index operations for "DFID
" rc:%d\n", dev->dd_lu_dev.ld_obd->obd_name,
PFID(lu_object_fid(&glb_idx->do_lu)), rc);
dt_object_put(env, glb_idx);
glb_idx = ERR_PTR(rc);
}
}
RETURN(glb_idx);
}
/*
* Look-up/create a global index file.
*
* \param env - is the environment passed by the caller
* \parap dev - is the dt_device where to lookup/create the global index file
* \param parent - is the parent directory where to create the global index if
* not found
* \param fid - is the fid of the global index to be looked up/created
* \parap local - indicates whether the index should be created with a local
* generated fid or with \fid
*
* \retval - pointer to the dt_object of the global index on success,
* appropriate error on failure
*/
struct dt_object *lquota_disk_glb_find_create(const struct lu_env *env,
struct dt_device *dev,
struct dt_object *parent,
struct lu_fid *fid, bool local)
{
struct lquota_thread_info *qti = lquota_info(env);
struct dt_object *glb_idx;
const struct dt_index_features *idx_feat;
ENTRY;
CDEBUG(D_QUOTA, "look-up/create %sglobal idx file ("DFID")\n",
local ? "local " : "", PFID(fid));
#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2,7,50,0)
/* we use different index feature for each quota type and target type
* for the time being. This is done for on-disk conversion from the old
* quota format. Once this is no longer required, we should just be
* using dt_quota_glb_features for all global index file */
idx_feat = glb_idx_feature(fid);
#else
#warning "remove old quota compatibility code"
idx_feat = &dt_quota_glb_features;
#endif
/* the filename is composed of the most signicant bits of the FID,
* that's to say the oid which encodes the pool id, pool type and quota
* type */
sprintf(qti->qti_buf, "0x%x", fid->f_oid);
if (local) {
/* We use the sequence reserved for local named objects */
lu_local_name_obj_fid(&qti->qti_fid, 1);
glb_idx = lquota_disk_find_create(env, dev, parent,
&qti->qti_fid, idx_feat,
qti->qti_buf);
} else {
/* look-up/create global index on disk */
glb_idx = local_index_find_or_create_with_fid(env, dev, fid,
parent,
qti->qti_buf,
LQUOTA_MODE,
idx_feat);
}
if (IS_ERR(glb_idx)) {
CERROR("%s: failed to look-up/create idx file "DFID" rc:%ld "
"local:%d\n", dev->dd_lu_dev.ld_obd->obd_name,
PFID(fid), PTR_ERR(glb_idx), local);
RETURN(glb_idx);
}
/* install index operation vector */
if (glb_idx->do_index_ops == NULL) {
int rc;
rc = glb_idx->do_ops->do_index_try(env, glb_idx, idx_feat);
if (rc) {
CERROR("%s: failed to setup index operations for "DFID
" rc:%d\n", dev->dd_lu_dev.ld_obd->obd_name,
PFID(lu_object_fid(&glb_idx->do_lu)), rc);
lu_object_put(env, &glb_idx->do_lu);
glb_idx = ERR_PTR(rc);
}
}
RETURN(glb_idx);
}
/*
* 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;
}
