/* type constructor/destructor: lov_type_{init,fini,start,stop}() */
LU_TYPE_INIT_FINI(lov, &lov_key, &lov_session_key);
+
+static int lov_mdc_dev_init(const struct lu_env *env, struct lov_device *ld,
+ struct lu_device *mdc_dev, __u32 idx, __u32 nr)
+{
+ struct cl_device *cl;
+
+ ENTRY;
+ cl = cl_type_setup(env, &ld->ld_site, &lovsub_device_type,
+ mdc_dev);
+ if (IS_ERR(cl))
+ RETURN(PTR_ERR(cl));
+
+ ld->ld_md_tgts[nr].ldm_mdc = cl;
+ ld->ld_md_tgts[nr].ldm_idx = idx;
+ RETURN(0);
+}
+
static struct lu_device *lov_device_fini(const struct lu_env *env,
- struct lu_device *d)
+ struct lu_device *d)
{
- int i;
- struct lov_device *ld = lu2lov_dev(d);
+ struct lov_device *ld = lu2lov_dev(d);
+ int i;
- LASSERT(ld->ld_lov != NULL);
- if (ld->ld_target == NULL)
- RETURN(NULL);
+ LASSERT(ld->ld_lov != NULL);
- lov_foreach_target(ld, i) {
- struct lovsub_device *lsd;
+ if (ld->ld_lmv != NULL) {
+ class_decref(ld->ld_lmv, "lov", d);
+ ld->ld_lmv = NULL;
+ }
- lsd = ld->ld_target[i];
- if (lsd != NULL) {
- cl_stack_fini(env, lovsub2cl_dev(lsd));
- ld->ld_target[i] = NULL;
- }
- }
- RETURN(NULL);
+ if (ld->ld_md_tgts != NULL) {
+ for (i = 0; i < ld->ld_md_tgts_nr; i++) {
+ if (ld->ld_md_tgts[i].ldm_mdc == NULL)
+ continue;
+
+ cl_stack_fini(env, ld->ld_md_tgts[i].ldm_mdc);
+ ld->ld_md_tgts[i].ldm_mdc = NULL;
+ ld->ld_lov->lov_mdc_tgts[i].lmtd_mdc = NULL;
+ }
+ }
+
+ if (ld->ld_target != NULL) {
+ lov_foreach_target(ld, i) {
+ struct lovsub_device *lsd;
+
+ lsd = ld->ld_target[i];
+ if (lsd != NULL) {
+ cl_stack_fini(env, lovsub2cl_dev(lsd));
+ ld->ld_target[i] = NULL;
+ }
+ }
+ }
+ RETURN(NULL);
}
static int lov_device_init(const struct lu_env *env, struct lu_device *d,
const char *name, struct lu_device *next)
{
- struct lov_device *ld = lu2lov_dev(d);
- int i;
- int rc = 0;
-
- LASSERT(d->ld_site != NULL);
- if (ld->ld_target == NULL)
- RETURN(rc);
-
- lov_foreach_target(ld, i) {
- struct lovsub_device *lsd;
- struct cl_device *cl;
- struct lov_tgt_desc *desc;
-
- desc = ld->ld_lov->lov_tgts[i];
- if (desc == NULL)
- continue;
-
- cl = cl_type_setup(env, d->ld_site, &lovsub_device_type,
- desc->ltd_obd->obd_lu_dev);
- if (IS_ERR(cl)) {
- rc = PTR_ERR(cl);
- break;
- }
- lsd = cl2lovsub_dev(cl);
- ld->ld_target[i] = lsd;
- }
+ struct lov_device *ld = lu2lov_dev(d);
+ int i;
+ int rc = 0;
+
+ /* check all added already MDC subdevices and initialize them */
+ for (i = 0; i < ld->ld_md_tgts_nr; i++) {
+ struct obd_device *mdc;
+ __u32 idx;
+
+ mdc = ld->ld_lov->lov_mdc_tgts[i].lmtd_mdc;
+ idx = ld->ld_lov->lov_mdc_tgts[i].lmtd_index;
+
+ if (mdc == NULL)
+ continue;
+
+ rc = lov_mdc_dev_init(env, ld, mdc->obd_lu_dev, idx, i);
+ if (rc) {
+ CERROR("%s: failed to add MDC %s as target: rc = %d\n",
+ d->ld_obd->obd_name,
+ obd_uuid2str(&mdc->obd_uuid), rc);
+ GOTO(out_err, rc);
+ }
+ }
- if (rc)
- lov_device_fini(env, d);
- else
- ld->ld_flags |= LOV_DEV_INITIALIZED;
+ if (ld->ld_target == NULL)
+ RETURN(0);
- RETURN(rc);
+ lov_foreach_target(ld, i) {
+ struct lovsub_device *lsd;
+ struct cl_device *cl;
+ struct lov_tgt_desc *desc;
+
+ desc = ld->ld_lov->lov_tgts[i];
+ if (desc == NULL)
+ continue;
+
+ cl = cl_type_setup(env, &ld->ld_site, &lovsub_device_type,
+ desc->ltd_obd->obd_lu_dev);
+ if (IS_ERR(cl))
+ GOTO(out_err, rc = PTR_ERR(cl));
+
+ lsd = cl2lovsub_dev(cl);
+ ld->ld_target[i] = lsd;
+ }
+ ld->ld_flags |= LOV_DEV_INITIALIZED;
+ RETURN(0);
+
+out_err:
+ lu_device_fini(d);
+ RETURN(rc);
}
/* Free the lov specific data created for the back end lu_device. */
struct lov_device *ld = lu2lov_dev(d);
const int nr = ld->ld_target_nr;
+ lu_site_fini(&ld->ld_site);
+
cl_device_fini(lu2cl_dev(d));
- if (ld->ld_target != NULL)
+ if (ld->ld_target) {
OBD_FREE(ld->ld_target, nr * sizeof ld->ld_target[0]);
+ ld->ld_target = NULL;
+ }
+ if (ld->ld_md_tgts) {
+ OBD_FREE(ld->ld_md_tgts,
+ sizeof(*ld->ld_md_tgts) * LOV_MDC_TGT_MAX);
+ ld->ld_md_tgts = NULL;
+ }
+ /* free array of MDCs */
+ if (ld->ld_lov->lov_mdc_tgts) {
+ OBD_FREE(ld->ld_lov->lov_mdc_tgts,
+ sizeof(*ld->ld_lov->lov_mdc_tgts) * LOV_MDC_TGT_MAX);
+ ld->ld_lov->lov_mdc_tgts = NULL;
+ }
OBD_FREE_PTR(ld);
return NULL;
RETURN(-EINVAL);
}
- rc = lov_expand_targets(env, ld);
- if (rc == 0 && ld->ld_flags & LOV_DEV_INITIALIZED) {
- LASSERT(dev->ld_site != NULL);
-
- cl = cl_type_setup(env, dev->ld_site, &lovsub_device_type,
+ rc = lov_expand_targets(env, ld);
+ if (rc == 0 && ld->ld_flags & LOV_DEV_INITIALIZED) {
+ cl = cl_type_setup(env, &ld->ld_site, &lovsub_device_type,
tgt->ltd_obd->obd_lu_dev);
if (!IS_ERR(cl)) {
lsd = cl2lovsub_dev(cl);
RETURN(rc);
}
-static int lov_process_config(const struct lu_env *env,
- struct lu_device *d, struct lustre_cfg *cfg)
+/**
+ * Add new MDC target device in LOV.
+ *
+ * This function is part of the configuration log processing. It adds new MDC
+ * device to the MDC device array indexed by their indexes.
+ *
+ * \param[in] env execution environment
+ * \param[in] d LU device of LOV device
+ * \param[in] mdc MDC device to add
+ * \param[in] idx MDC device index
+ *
+ * \retval 0 if successful
+ * \retval negative value on error
+ */
+static int lov_add_mdc_target(const struct lu_env *env, struct lu_device *d,
+ struct obd_device *mdc, __u32 idx)
{
- struct obd_device *obd = d->ld_obd;
- int cmd;
- int rc;
- int gen;
- __u32 index;
+ struct lov_device *ld = lu2lov_dev(d);
+ struct obd_device *lov_obd = d->ld_obd;
+ struct obd_device *lmv_obd;
+ int next;
+ int rc = 0;
- obd_getref(obd);
+ ENTRY;
- cmd = cfg->lcfg_command;
- rc = lov_process_config_base(d->ld_obd, cfg, &index, &gen);
- if (rc == 0) {
- switch(cmd) {
- case LCFG_LOV_ADD_OBD:
- case LCFG_LOV_ADD_INA:
- rc = lov_cl_add_target(env, d, index);
- if (rc != 0)
- lov_del_target(d->ld_obd, index, NULL, 0);
- break;
- case LCFG_LOV_DEL_OBD:
- lov_cl_del_target(env, d, index);
- break;
- }
- }
- obd_putref(obd);
- RETURN(rc);
+ LASSERT(mdc != NULL);
+ if (ld->ld_md_tgts_nr == LOV_MDC_TGT_MAX) {
+ /* If the maximum value of LOV_MDC_TGT_MAX will become too
+ * small then all MD target handling must be rewritten in LOD
+ * manner, check lod_add_device() and related functionality.
+ */
+ CERROR("%s: cannot serve more than %d MDC devices\n",
+ lov_obd->obd_name, LOV_MDC_TGT_MAX);
+ RETURN(-ERANGE);
+ }
+
+ /* grab FLD from lmv, do that here, when first MDC is added
+ * to be sure LMV is set up and can be found */
+ if (ld->ld_lmv == NULL) {
+ next = 0;
+ while ((lmv_obd = class_devices_in_group(&lov_obd->obd_uuid,
+ &next)) != NULL) {
+ if ((strncmp(lmv_obd->obd_type->typ_name,
+ LUSTRE_LMV_NAME,
+ strlen(LUSTRE_LMV_NAME)) == 0))
+ break;
+ }
+ if (lmv_obd == NULL) {
+ CERROR("%s: cannot find LMV OBD by UUID (%s)\n",
+ lov_obd->obd_name,
+ obd_uuid2str(&lmv_obd->obd_uuid));
+ RETURN(-ENODEV);
+ }
+ spin_lock(&lmv_obd->obd_dev_lock);
+ class_incref(lmv_obd, "lov", ld);
+ spin_unlock(&lmv_obd->obd_dev_lock);
+ ld->ld_lmv = lmv_obd;
+ }
+
+ LASSERT(lov_obd->u.lov.lov_mdc_tgts[ld->ld_md_tgts_nr].lmtd_mdc ==
+ NULL);
+
+ if (ld->ld_flags & LOV_DEV_INITIALIZED) {
+ rc = lov_mdc_dev_init(env, ld, mdc->obd_lu_dev, idx,
+ ld->ld_md_tgts_nr);
+ if (rc) {
+ CERROR("%s: failed to add MDC %s as target: rc = %d\n",
+ lov_obd->obd_name, obd_uuid2str(&mdc->obd_uuid),
+ rc);
+ RETURN(rc);
+ }
+ }
+
+ lov_obd->u.lov.lov_mdc_tgts[ld->ld_md_tgts_nr].lmtd_mdc = mdc;
+ lov_obd->u.lov.lov_mdc_tgts[ld->ld_md_tgts_nr].lmtd_index = idx;
+ ld->ld_md_tgts_nr++;
+
+ RETURN(rc);
+}
+
+static int lov_process_config(const struct lu_env *env,
+ struct lu_device *d, struct lustre_cfg *cfg)
+{
+ struct obd_device *obd = d->ld_obd;
+ int cmd;
+ int rc;
+ int gen;
+ __u32 index;
+
+ obd_getref(obd);
+
+ cmd = cfg->lcfg_command;
+
+ rc = lov_process_config_base(d->ld_obd, cfg, &index, &gen);
+ if (rc < 0)
+ GOTO(out, rc);
+
+ switch (cmd) {
+ case LCFG_LOV_ADD_OBD:
+ case LCFG_LOV_ADD_INA:
+ rc = lov_cl_add_target(env, d, index);
+ if (rc != 0)
+ lov_del_target(d->ld_obd, index, NULL, 0);
+ break;
+ case LCFG_LOV_DEL_OBD:
+ lov_cl_del_target(env, d, index);
+ break;
+ case LCFG_ADD_MDC:
+ {
+ struct obd_device *mdc;
+ struct obd_uuid tgt_uuid;
+
+ /* modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDT0000_UUID
+ * 2:0 3:1 4:lustre-MDT0000-mdc_UUID */
+ if (LUSTRE_CFG_BUFLEN(cfg, 1) > sizeof(tgt_uuid.uuid))
+ GOTO(out, rc = -EINVAL);
+
+ obd_str2uuid(&tgt_uuid, lustre_cfg_buf(cfg, 1));
+
+ if (sscanf(lustre_cfg_buf(cfg, 2), "%d", &index) != 1)
+ GOTO(out, rc = -EINVAL);
+
+ mdc = class_find_client_obd(&tgt_uuid, LUSTRE_MDC_NAME,
+ &obd->obd_uuid);
+ if (mdc == NULL)
+ GOTO(out, rc = -ENODEV);
+ rc = lov_add_mdc_target(env, d, mdc, index);
+ break;
+ }
+ }
+out:
+ obd_putref(obd);
+ RETURN(rc);
}
static const struct lu_device_operations lov_lu_ops = {
obd = class_name2obd(lustre_cfg_string(cfg, 0));
LASSERT(obd != NULL);
rc = lov_setup(obd, cfg);
- if (rc) {
- lov_device_free(env, d);
- RETURN(ERR_PTR(rc));
- }
+ if (rc)
+ GOTO(out, rc);
+
+ /* Alloc MDC devices array */
+ /* XXX: need dynamic allocation at some moment */
+ OBD_ALLOC(ld->ld_md_tgts, sizeof(*ld->ld_md_tgts) * LOV_MDC_TGT_MAX);
+ if (ld->ld_md_tgts == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ ld->ld_md_tgts_nr = 0;
+
+ ld->ld_lov = &obd->u.lov;
+ OBD_ALLOC(ld->ld_lov->lov_mdc_tgts,
+ sizeof(*ld->ld_lov->lov_mdc_tgts) * LOV_MDC_TGT_MAX);
+ if (ld->ld_lov->lov_mdc_tgts == NULL)
+ GOTO(out_md_tgts, rc = -ENOMEM);
+
+ rc = lu_site_init(&ld->ld_site, d);
+ if (rc != 0)
+ GOTO(out_mdc_tgts, rc);
+
+ rc = lu_site_init_finish(&ld->ld_site);
+ if (rc != 0)
+ GOTO(out_site, rc);
+
+ RETURN(d);
+out_site:
+ lu_site_fini(&ld->ld_site);
+out_mdc_tgts:
+ OBD_FREE(ld->ld_lov->lov_mdc_tgts,
+ sizeof(*ld->ld_lov->lov_mdc_tgts) * LOV_MDC_TGT_MAX);
+ ld->ld_lov->lov_mdc_tgts = NULL;
+out_md_tgts:
+ OBD_FREE(ld->ld_md_tgts, sizeof(*ld->ld_md_tgts) * LOV_MDC_TGT_MAX);
+ ld->ld_md_tgts = NULL;
+out:
+ OBD_FREE_PTR(ld);
- ld->ld_lov = &obd->u.lov;
- RETURN(d);
+ return ERR_PTR(rc);
}
static const struct lu_device_type_operations lov_device_type_ops = {
git://git.whamcloud.com / fs / lustre-release.git / blobdiff