* (C) Copyright 2012 Commissariat a l'energie atomique et aux energies
* alternatives
*
- * Copyright (c) 2013, 2014, Intel Corporation.
+ * Copyright (c) 2013, 2017, Intel Corporation.
*/
/*
* lustre/mdt/mdt_hsm_cdt_client.c
RETURN(*mask & (1UL << hsma) ? 0 : -EPERM);
}
-/*
- * Coordinator external API
- */
-
-/**
- * register a list of requests
- * \param mti [IN]
- * \param hal [IN] list of requests
- * \retval 0 success
- * \retval -ve failure
- * in case of restore, caller must hold layout lock
- */
-int mdt_hsm_add_actions(struct mdt_thread_info *mti,
- struct hsm_action_list *hal)
+/* Process a single HAL. hsm_find_compatible has already been called
+ * on it. */
+static int mdt_hsm_register_hal(struct mdt_thread_info *mti,
+ struct mdt_device *mdt,
+ struct coordinator *cdt,
+ struct hsm_action_list *hal)
{
- struct mdt_device *mdt = mti->mti_mdt;
- struct coordinator *cdt = &mdt->mdt_coordinator;
struct hsm_action_item *hai;
struct mdt_object *obj = NULL;
- int rc = 0, i;
+ int rc, i;
struct md_hsm mh;
bool is_restore = false;
__u64 compound_id;
- ENTRY;
-
- /* no coordinator started, so we cannot serve requests */
- if (cdt->cdt_state == CDT_STOPPED)
- RETURN(-EAGAIN);
-
- if (!hal_is_sane(hal))
- RETURN(-EINVAL);
compound_id = atomic_inc_return(&cdt->cdt_compound_id);
- /* search for compatible request, if found hai_cookie is set
- * to the request cookie
- * it is also used to set the cookie for cancel request by FID
- */
- rc = hsm_find_compatible(mti->mti_env, mdt, hal);
- if (rc)
- GOTO(out, rc);
-
hai = hai_first(hal);
for (i = 0; i < hal->hal_count; i++, hai = hai_next(hai)) {
int archive_id;
/* if restore, take an exclusive lock on layout */
if (hai->hai_action == HSMA_RESTORE) {
- struct cdt_restore_handle *crh;
-
/* in V1 only whole file is supported. */
if (hai->hai_extent.offset != 0)
GOTO(out, rc = -EPROTO);
- OBD_SLAB_ALLOC_PTR(crh, mdt_hsm_cdt_kmem);
- if (crh == NULL)
- GOTO(out, rc = -ENOMEM);
-
- crh->crh_fid = hai->hai_fid;
- /* in V1 only whole file is supported. However the
- * restore may be due to truncate. */
- crh->crh_extent.start = 0;
- crh->crh_extent.end = hai->hai_extent.length;
-
- mdt_lock_reg_init(&crh->crh_lh, LCK_EX);
- obj = mdt_object_find_lock(mti, &crh->crh_fid,
- &crh->crh_lh,
- MDS_INODELOCK_LAYOUT);
- if (IS_ERR(obj)) {
- rc = PTR_ERR(obj);
- CERROR("%s: cannot take layout lock for "
- DFID": rc = %d\n", mdt_obd_name(mdt),
- PFID(&crh->crh_fid), rc);
- OBD_SLAB_FREE_PTR(crh, mdt_hsm_cdt_kmem);
+ rc = cdt_restore_handle_add(mti, cdt, &hai->hai_fid,
+ &hai->hai_extent);
+ if (rc < 0)
GOTO(out, rc);
- }
-
- /* we choose to not keep a keep a reference
- * on the object during the restore time which can be
- * very long */
- mdt_object_put(mti->mti_env, obj);
-
- mutex_lock(&cdt->cdt_restore_lock);
- list_add_tail(&crh->crh_list, &cdt->cdt_restore_hdl);
- mutex_unlock(&cdt->cdt_restore_lock);
}
record:
+ /*
+ * Wait here to catch the 2nd RESTORE request to the same FID.
+ * Normally layout lock protects against adding such request.
+ * But when cdt is stopping it cancel all locks via
+ * ldlm_resource_clean and protections may not work.
+ * See LU-9266 and sanity-hsm_407 for details.
+ */
+ OBD_FAIL_TIMEOUT(OBD_FAIL_MDS_HSM_CDT_DELAY, cfs_fail_val);
/* record request */
rc = mdt_agent_record_add(mti->mti_env, mdt, compound_id,
archive_id, flags, hai);
rc = 0;
GOTO(out, rc);
+
out:
- /* if work has been added, wake up coordinator */
+ return rc;
+}
+
+/*
+ * Coordinator external API
+ */
+
+/**
+ * register a list of requests
+ * \param mti [IN]
+ * \param hal [IN] list of requests
+ * \retval 0 success
+ * \retval -ve failure
+ * in case of restore, caller must hold layout lock
+ */
+int mdt_hsm_add_actions(struct mdt_thread_info *mti,
+ struct hsm_action_list *hal)
+{
+ struct mdt_device *mdt = mti->mti_mdt;
+ struct coordinator *cdt = &mdt->mdt_coordinator;
+ int rc;
+ ENTRY;
+
+ /* no coordinator started, so we cannot serve requests */
+ if (cdt->cdt_state == CDT_STOPPED)
+ RETURN(-EAGAIN);
+
+ if (!hal_is_sane(hal))
+ RETURN(-EINVAL);
+
+ /* search for compatible request, if found hai_cookie is set
+ * to the request cookie
+ * it is also used to set the cookie for cancel request by FID
+ */
+ rc = hsm_find_compatible(mti->mti_env, mdt, hal);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = mdt_hsm_register_hal(mti, mdt, cdt, hal);
+
+ GOTO(out, rc);
+out:
+ /* if work has been added, signal the coordinator */
if (rc == 0 || rc == -ENODATA)
- mdt_hsm_cdt_wakeup(mdt);
+ mdt_hsm_cdt_event(cdt);
return rc;
}
bool mdt_hsm_restore_is_running(struct mdt_thread_info *mti,
const struct lu_fid *fid)
{
- struct mdt_device *mdt = mti->mti_mdt;
- struct coordinator *cdt = &mdt->mdt_coordinator;
- struct cdt_restore_handle *crh;
- bool rc = false;
+ struct coordinator *cdt = &mti->mti_mdt->mdt_coordinator;
+ bool is_running;
ENTRY;
- if (!fid_is_sane(fid))
- RETURN(rc);
-
mutex_lock(&cdt->cdt_restore_lock);
- list_for_each_entry(crh, &cdt->cdt_restore_hdl, crh_list) {
- if (lu_fid_eq(&crh->crh_fid, fid)) {
- rc = true;
- break;
- }
- }
+ is_running = (cdt_restore_handle_find(cdt, fid) != NULL);
mutex_unlock(&cdt->cdt_restore_lock);
- RETURN(rc);
+
+ RETURN(is_running);
}
/**
git://git.whamcloud.com / fs / lustre-release.git / blobdiff