/**
* Lookup sequece in local cache/fldb.
**/
int fld_local_lookup(const struct lu_env *env, struct lu_server_fld *fld,
u64 seq, struct lu_seq_range *range)
{
struct lu_seq_range *erange;
struct fld_thread_info *info;
int rc;
ENTRY;
info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
LASSERT(info != NULL);
erange = &info->fti_lrange;
/* Lookup it in the cache. */
rc = fld_cache_lookup(fld->lsf_cache, seq, erange);
if (rc == 0) {
if (unlikely(fld_range_type(erange) != fld_range_type(range) &&
!fld_range_is_any(range))) {
CERROR("%s: FLD cache range "DRANGE" does not match"
"requested flag %x: rc = %d\n", fld->lsf_name,
PRANGE(erange), range->lsr_flags, -EIO);
RETURN(-EIO);
}
*range = *erange;
RETURN(0);
}
RETURN(rc);
}
/**
* lookup range for a seq passed. note here we only care about the start/end,
* caller should handle the attached location data (flags, index).
*
* \param seq seq for lookup.
* \param range result of lookup.
*
* \retval 0 found, \a range is the matched range;
* \retval -ENOENT not found, \a range is the left-side range;
* \retval -ve other error;
*/
int fld_index_lookup(const struct lu_env *env, struct lu_server_fld *fld,
seqno_t seq, struct lu_seq_range *range)
{
struct lu_seq_range *fld_rec;
struct fld_thread_info *info;
int rc;
ENTRY;
info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
fld_rec = &info->fti_rec;
rc = fld_cache_lookup(fld->lsf_cache, seq, fld_rec);
if (rc == 0) {
*range = *fld_rec;
if (range_within(range, seq))
rc = 0;
else
rc = -ENOENT;
}
CDEBUG(D_INFO, "%s: lookup seq = "LPX64" range : "DRANGE" rc = %d\n",
fld->lsf_name, seq, PRANGE(range), rc);
RETURN(rc);
}
/*
* Returns true, if fid is local to this server node.
*
* WARNING: this function is *not* guaranteed to return false if fid is
* remote: it makes an educated conservative guess only.
*
* fid_is_local() is supposed to be used in assertion checks only.
*/
int fid_is_local(const struct lu_env *env,
struct lu_site *site, const struct lu_fid *fid)
{
int result;
struct seq_server_site *ss_site;
struct lu_seq_range *range;
struct fld_thread_info *info;
ENTRY;
info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
range = &info->fti_lrange;
result = 1; /* conservatively assume fid is local */
ss_site = lu_site2seq(site);
if (ss_site->ss_client_fld != NULL) {
int rc;
rc = fld_cache_lookup(ss_site->ss_client_fld->lcf_cache,
fid_seq(fid), range);
if (rc == 0)
result = (range->lsr_index == ss_site->ss_node_id);
}
return result;
}
