static int __seq_server_alloc_meta(struct lu_server_seq *seq,
struct lu_seq_range *out,
const struct lu_env *env)
{
struct lu_seq_range *space = &seq->lss_space;
int rc = 0;
ENTRY;
LASSERT(range_is_sane(space));
/* Check if available space ends and allocate new super seq */
if (range_is_exhausted(space)) {
if (!seq->lss_cli) {
CERROR("%s: No sequence controller is attached.\n",
seq->lss_name);
RETURN(-ENODEV);
}
rc = seq_client_alloc_super(seq->lss_cli, env);
if (rc) {
CERROR("%s: Can't allocate super-sequence, rc %d\n",
seq->lss_name, rc);
RETURN(rc);
}
/* Saving new range to allocation space. */
*space = seq->lss_cli->lcs_space;
LASSERT(range_is_sane(space));
}
rc = range_alloc_set(env, out, seq);
if (rc != 0) {
CERROR("%s: Allocated meta-sequence failed: rc = %d\n",
seq->lss_name, rc);
RETURN(rc);
}
CDEBUG(D_INFO, "%s: Allocated meta-sequence " DRANGE"\n",
seq->lss_name, PRANGE(out));
RETURN(rc);
}
/**
* Check if the sequence server has sequence avaible
*
* Check if the sequence server has sequence avaible, if not, then
* allocating super sequence from sequence manager (MDT0).
*
* \param[in] env execution environment
* \param[in] seq server sequence
*
* \retval negative errno if allocating new sequence fails
* \retval 0 if there is enough sequence or allocating
* new sequence succeeds
*/
int seq_server_check_and_alloc_super(const struct lu_env *env,
struct lu_server_seq *seq)
{
struct lu_seq_range *space = &seq->lss_space;
int rc = 0;
ENTRY;
/* Check if available space ends and allocate new super seq */
if (lu_seq_range_is_exhausted(space)) {
if (!seq->lss_cli) {
CERROR("%s: No sequence controller is attached.\n",
seq->lss_name);
RETURN(-ENODEV);
}
rc = seq_client_alloc_super(seq->lss_cli, env);
if (rc) {
CDEBUG(D_HA, "%s: Can't allocate super-sequence:"
" rc %d\n", seq->lss_name, rc);
RETURN(rc);
}
/* Saving new range to allocation space. */
*space = seq->lss_cli->lcs_space;
LASSERT(lu_seq_range_is_sane(space));
if (seq->lss_cli->lcs_srv == NULL) {
struct lu_server_fld *fld;
/* Insert it to the local FLDB */
fld = seq->lss_site->ss_server_fld;
mutex_lock(&fld->lsf_lock);
rc = fld_insert_entry(env, fld, space);
mutex_unlock(&fld->lsf_lock);
}
}
if (lu_seq_range_is_zero(&seq->lss_lowater_set))
__seq_set_init(env, seq);
RETURN(rc);
}
