+ struct obd_capa *ocapa;
+ ENTRY;
+
+ LASSERT(inode != NULL);
+
+ if ((ll_i2sbi(inode)->ll_flags & LL_SBI_MDS_CAPA) == 0)
+ RETURN(NULL);
+
+ spin_lock(&capa_lock);
+ ocapa = capa_get(lli->lli_mds_capa);
+ spin_unlock(&capa_lock);
+ if (!ocapa && atomic_read(&ll_capa_debug)) {
+ CERROR("no mds capability for "DFID"\n", PFID(&lli->lli_fid));
+ atomic_set(&ll_capa_debug, 0);
+ }
+
+ RETURN(ocapa);
+}
+
+static struct obd_capa *do_add_mds_capa(struct inode *inode,
+ struct obd_capa *ocapa)
+{
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct obd_capa *old = lli->lli_mds_capa;
+ struct lustre_capa *capa = &ocapa->c_capa;
+
+ if (!old) {
+ ocapa->u.cli.inode = inode;
+ lli->lli_mds_capa = ocapa;
+ capa_count[CAPA_SITE_CLIENT]++;
+
+ DEBUG_CAPA(D_SEC, capa, "add MDS");
+ } else {
+ spin_lock(&old->c_lock);
+ old->c_capa = *capa;
+ spin_unlock(&old->c_lock);
+
+ DEBUG_CAPA(D_SEC, capa, "update MDS");
+
+ capa_put(ocapa);
+ ocapa = old;
+ }
+ return ocapa;
+}
+
+static struct obd_capa *do_lookup_oss_capa(struct inode *inode, int opc)
+{
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct obd_capa *ocapa;
+
+ /* inside capa_lock */
+ list_for_each_entry(ocapa, &lli->lli_oss_capas, u.cli.lli_list) {
+ if ((capa_opc(&ocapa->c_capa) & opc) != opc)
+ continue;
+
+ LASSERT(lu_fid_eq(capa_fid(&ocapa->c_capa),
+ ll_inode2fid(inode)));
+ LASSERT(ocapa->c_site == CAPA_SITE_CLIENT);
+
+ DEBUG_CAPA(D_SEC, &ocapa->c_capa, "found client");
+ return ocapa;
+ }
+
+ return NULL;
+}
+
+static inline void inode_add_oss_capa(struct inode *inode,
+ struct obd_capa *ocapa)
+{
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct obd_capa *tmp;
+ struct list_head *next = NULL;
+
+ /* capa is sorted in lli_oss_capas so lookup can always find the
+ * latest one */
+ list_for_each_entry(tmp, &lli->lli_oss_capas, u.cli.lli_list) {
+ if (cfs_time_after(ocapa->c_expiry, tmp->c_expiry)) {
+ next = &tmp->u.cli.lli_list;
+ break;
+ }
+ }
+ LASSERT(&ocapa->u.cli.lli_list != next);
+ list_move_tail(&ocapa->u.cli.lli_list, next ?: &lli->lli_oss_capas);
+}
+
+static struct obd_capa *do_add_oss_capa(struct inode *inode,
+ struct obd_capa *ocapa)
+{
+ struct obd_capa *old;
+ struct lustre_capa *capa = &ocapa->c_capa;
+
+ LASSERTF(S_ISREG(inode->i_mode),
+ "inode has oss capa, but not regular file, mode: %d\n",
+ inode->i_mode);
+
+ /* FIXME: can't replace it so easily with fine-grained opc */
+ old = do_lookup_oss_capa(inode, capa_opc(capa) & CAPA_OPC_OSS_ONLY);
+ if (!old) {
+ ocapa->u.cli.inode = inode;
+ INIT_LIST_HEAD(&ocapa->u.cli.lli_list);
+ capa_count[CAPA_SITE_CLIENT]++;
+
+ DEBUG_CAPA(D_SEC, capa, "add OSS");
+ } else {
+ spin_lock(&old->c_lock);
+ old->c_capa = *capa;
+ spin_unlock(&old->c_lock);
+
+ DEBUG_CAPA(D_SEC, capa, "update OSS");
+
+ capa_put(ocapa);
+ ocapa = old;
+ }
+
+ inode_add_oss_capa(inode, ocapa);
+ return ocapa;
+}
+
+struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa)
+{
+ spin_lock(&capa_lock);
+ ocapa = capa_for_mds(&ocapa->c_capa) ? do_add_mds_capa(inode, ocapa) :
+ do_add_oss_capa(inode, ocapa);
+
+ /* truncate capa won't renew */
+ if (ocapa->c_capa.lc_opc != CAPA_OPC_OSS_TRUNC) {
+ set_capa_expiry(ocapa);
+ list_del_init(&ocapa->c_list);
+ sort_add_capa(ocapa, ll_capa_list);
+
+ update_capa_timer(ocapa, capa_renewal_time(ocapa));
+ }
+
+ spin_unlock(&capa_lock);
+
+ atomic_set(&ll_capa_debug, 1);
+ return ocapa;
+}
+
+static inline void delay_capa_renew(struct obd_capa *oc, cfs_time_t delay)
+{
+ /* NB: set a fake expiry for this capa to prevent it renew too soon */
+ oc->c_expiry = cfs_time_add(oc->c_expiry, cfs_time_seconds(delay));
+}
+
+int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa)
+{
+ struct inode *inode = ocapa->u.cli.inode;