* GPL HEADER END
*/
/*
- * Copyright (c) 2011, 2012, Intel, Inc.
+ * Copyright (c) 2012, 2013, Intel Corporation.
* Use is subject to license terms.
*
- * Author: Johann Lombardi <johann@whamcloud.com>
- * Author: Niu Yawei <niu@whamcloud.com>
+ * Author: Johann Lombardi <johann.lombardi@intel.com>
+ * Author: Niu Yawei <yawei.niu@intel.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
#define DEBUG_SUBSYSTEM S_LQUOTA
#include "qsd_internal.h"
+/*
+ * Completion function invoked when the global quota lock enqueue has completed
+ */
+static void qsd_reint_completion(const struct lu_env *env,
+ struct qsd_qtype_info *qqi,
+ struct quota_body *req_qbody,
+ struct quota_body *rep_qbody,
+ struct lustre_handle *lockh,
+ struct lquota_lvb *lvb,
+ void *arg, int rc)
+{
+ struct qsd_instance *qsd = qqi->qqi_qsd;
+ __u64 *slv_ver = (__u64 *)arg;
+ ENTRY;
+
+ if (rc) {
+ CDEBUG_LIMIT(rc != -EAGAIN ? D_ERROR : D_QUOTA,
+ "%s: failed to enqueue global quota lock, glb fid:"
+ DFID", rc:%d\n", qsd->qsd_svname,
+ PFID(&req_qbody->qb_fid), rc);
+ RETURN_EXIT;
+ }
+
+ CDEBUG(D_QUOTA, "%s: global quota lock successfully acquired, glb "
+ "fid:"DFID", glb ver:"LPU64", slv fid:"DFID", slv ver:"LPU64"\n",
+ qsd->qsd_svname, PFID(&req_qbody->qb_fid),
+ lvb->lvb_glb_ver, PFID(&rep_qbody->qb_slv_fid),
+ rep_qbody->qb_slv_ver);
+
+ *slv_ver = rep_qbody->qb_slv_ver;
+ memcpy(&qqi->qqi_slv_fid, &rep_qbody->qb_slv_fid,
+ sizeof(struct lu_fid));
+ lustre_handle_copy(&qqi->qqi_lockh, lockh);
+ EXIT;
+}
+
+static int qsd_reint_qid(const struct lu_env *env, struct qsd_qtype_info *qqi,
+ bool global, union lquota_id *qid, void *rec)
+{
+ struct lquota_entry *lqe;
+ int rc;
+ ENTRY;
+
+ lqe = lqe_locate(env, qqi->qqi_site, qid);
+ if (IS_ERR(lqe))
+ RETURN(PTR_ERR(lqe));
+
+ LQUOTA_DEBUG(lqe, "reintegrating entry");
+
+ rc = qsd_update_lqe(env, lqe, global, rec);
+ if (rc)
+ GOTO(out, rc);
+
+ rc = qsd_update_index(env, qqi, qid, global, 0, rec);
+out:
+ lqe_putref(lqe);
+ RETURN(rc);
+}
+
+static int qsd_reint_entries(const struct lu_env *env,
+ struct qsd_qtype_info *qqi,
+ struct idx_info *ii, bool global,
+ struct page **pages,
+ unsigned int npages, bool need_swab)
+{
+ struct qsd_thread_info *qti = qsd_info(env);
+ struct qsd_instance *qsd = qqi->qqi_qsd;
+ union lquota_id *qid = &qti->qti_id;
+ int i, j, k, size;
+ int rc = 0;
+ ENTRY;
+
+ CDEBUG(D_QUOTA, "%s: processing %d pages for %s index\n",
+ qsd->qsd_svname, npages, global ? "global" : "slave");
+
+ /* sanity check on the record size */
+ if ((global && ii->ii_recsize != sizeof(struct lquota_glb_rec)) ||
+ (!global && ii->ii_recsize != sizeof(struct lquota_slv_rec))) {
+ CERROR("%s: invalid record size (%d) for %s index\n",
+ qsd->qsd_svname, ii->ii_recsize,
+ global ? "global" : "slave");
+ RETURN(-EINVAL);
+ }
+
+ size = ii->ii_recsize + ii->ii_keysize;
+
+ for (i = 0; i < npages; i++) {
+ union lu_page *lip = kmap(pages[i]);
+
+ for (j = 0; j < LU_PAGE_COUNT; j++) {
+ if (need_swab)
+ /* swab header */
+ lustre_swab_lip_header(&lip->lp_idx);
+
+ if (lip->lp_idx.lip_magic != LIP_MAGIC) {
+ CERROR("%s: invalid magic (%x != %x) for page "
+ "%d/%d while transferring %s index\n",
+ qsd->qsd_svname, lip->lp_idx.lip_magic,
+ LIP_MAGIC, i + 1, npages,
+ global ? "global" : "slave");
+ GOTO(out, rc = -EINVAL);
+ }
+
+ CDEBUG(D_QUOTA, "%s: processing page %d/%d with %d "
+ "entries for %s index\n", qsd->qsd_svname, i + 1,
+ npages, lip->lp_idx.lip_nr,
+ global ? "global" : "slave");
+
+ for (k = 0; k < lip->lp_idx.lip_nr; k++) {
+ char *entry;
+
+ entry = lip->lp_idx.lip_entries + k * size;
+ memcpy(qid, entry, ii->ii_keysize); /* key */
+ entry += ii->ii_keysize; /* value */
+
+ if (need_swab) {
+ int offset = 0;
+
+ /* swab key */
+ __swab64s(&qid->qid_uid);
+ /* quota records only include 64-bit
+ * fields */
+ while (offset < ii->ii_recsize) {
+ __swab64s((__u64 *)
+ (entry + offset));
+ offset += sizeof(__u64);
+ }
+ }
+
+ rc = qsd_reint_qid(env, qqi, global, qid,
+ (void *)entry);
+ if (rc)
+ GOTO(out, rc);
+ }
+ lip++;
+ }
+out:
+ kunmap(pages[i]);
+ if (rc)
+ break;
+ }
+ RETURN(rc);
+}
+
+static int qsd_reint_index(const struct lu_env *env, struct qsd_qtype_info *qqi,
+ bool global)
+{
+ struct qsd_thread_info *qti = qsd_info(env);
+ struct qsd_instance *qsd = qqi->qqi_qsd;
+ struct idx_info *ii = &qti->qti_ii;
+ struct lu_fid *fid;
+ struct page **pages = NULL;
+ unsigned int npages, pg_cnt;
+ __u64 start_hash = 0, ver = 0;
+ bool need_swab = false;
+ int i, rc;
+ ENTRY;
+
+ fid = global ? &qqi->qqi_fid : &qqi->qqi_slv_fid;
+
+ /* let's do a 1MB bulk */
+ npages = min_t(unsigned int, OFD_MAX_BRW_SIZE, 1 << 20);
+ npages /= PAGE_CACHE_SIZE;
+
+ /* allocate pages for bulk index read */
+ OBD_ALLOC(pages, npages * sizeof(*pages));
+ if (pages == NULL)
+ GOTO(out, rc = -ENOMEM);
+ for (i = 0; i < npages; i++) {
+ pages[i] = alloc_page(GFP_IOFS);
+ if (pages[i] == NULL)
+ GOTO(out, rc = -ENOMEM);
+ }
+
+repeat:
+ /* initialize index_info request with FID of global index */
+ memset(ii, 0, sizeof(*ii));
+ memcpy(&ii->ii_fid, fid, sizeof(*fid));
+ ii->ii_magic = IDX_INFO_MAGIC;
+ ii->ii_flags = II_FL_NOHASH;
+ ii->ii_count = npages * LU_PAGE_COUNT;
+ ii->ii_hash_start = start_hash;
+
+ /* send bulk request to quota master to read global index */
+ rc = qsd_fetch_index(env, qsd->qsd_exp, ii, npages, pages, &need_swab);
+ if (rc) {
+ CWARN("%s: failed to fetch index for "DFID". %d\n",
+ qsd->qsd_svname, PFID(fid), rc);
+ GOTO(out, rc);
+ }
+
+ /* various sanity checks */
+ if (ii->ii_magic != IDX_INFO_MAGIC) {
+ CERROR("%s: invalid magic in index transfer %x != %x\n",
+ qsd->qsd_svname, ii->ii_magic, IDX_INFO_MAGIC);
+ GOTO(out, rc = -EPROTO);
+ }
+ if ((ii->ii_flags & II_FL_VARKEY) != 0)
+ CWARN("%s: II_FL_VARKEY is set on index transfer for fid "DFID
+ ", it shouldn't be\n", qsd->qsd_svname, PFID(fid));
+ if ((ii->ii_flags & II_FL_NONUNQ) != 0)
+ CWARN("%s: II_FL_NONUNQ is set on index transfer for fid "DFID
+ ", it shouldn't be\n", qsd->qsd_svname, PFID(fid));
+ if (ii->ii_keysize != sizeof(__u64)) {
+ CERROR("%s: invalid key size reported on index transfer for "
+ "fid "DFID", %u != %u\n", qsd->qsd_svname, PFID(fid),
+ ii->ii_keysize, (int)sizeof(__u64));
+ GOTO(out, rc = -EPROTO);
+ }
+ if (ii->ii_version == 0 && ii->ii_count != 0)
+ CWARN("%s: index version for fid "DFID" is 0, but index isn't "
+ "empty (%d)\n", qsd->qsd_svname, PFID(fid), ii->ii_count);
+
+ CDEBUG(D_QUOTA, "%s: reintegration process for fid "DFID" successfully "
+ "fetched %s index, count = %d\n", qsd->qsd_svname,
+ PFID(fid), global ? "global" : "slave", ii->ii_count);
+
+ if (start_hash == 0)
+ /* record version associated with the first bulk transfer */
+ ver = ii->ii_version;
+
+ pg_cnt = (ii->ii_count + (LU_PAGE_COUNT) - 1);
+ pg_cnt >>= PAGE_CACHE_SHIFT - LU_PAGE_SHIFT;
+
+ if (pg_cnt > npages) {
+ CERROR("%s: master returned more pages than expected, %u > %u"
+ "\n", qsd->qsd_svname, pg_cnt, npages);
+ pg_cnt = npages;
+ }
+
+ rc = qsd_reint_entries(env, qqi, ii, global, pages, pg_cnt, need_swab);
+ if (rc)
+ GOTO(out, rc);
+
+ if (ii->ii_hash_end != II_END_OFF) {
+ start_hash = ii->ii_hash_end;
+ goto repeat;
+ }
+out:
+ if (pages != NULL) {
+ for (i = 0; i < npages; i++)
+ if (pages[i] != NULL)
+ __free_page(pages[i]);
+ OBD_FREE(pages, npages * sizeof(*pages));
+ }
+
+ /* Update index version */
+ if (rc == 0) {
+ rc = qsd_write_version(env, qqi, ver, global);
+ if (rc)
+ CERROR("%s: write version "LPU64" to "DFID" failed. "
+ "%d\n", qsd->qsd_svname, ver, PFID(fid), rc);
+ }
+
+ RETURN(rc);
+}
+
+static int qsd_reconciliation(const struct lu_env *env,
+ struct qsd_qtype_info *qqi)
+{
+ struct qsd_thread_info *qti = qsd_info(env);
+ struct qsd_instance *qsd = qqi->qqi_qsd;
+ const struct dt_it_ops *iops;
+ struct dt_it *it;
+ struct dt_key *key;
+ struct lquota_entry *lqe;
+ union lquota_id *qid = &qti->qti_id;
+ int rc;
+ ENTRY;
+
+ LASSERT(qqi->qqi_glb_obj != NULL);
+ iops = &qqi->qqi_glb_obj->do_index_ops->dio_it;
+
+ it = iops->init(env, qqi->qqi_glb_obj, 0, BYPASS_CAPA);
+ if (IS_ERR(it)) {
+ CWARN("%s: Initialize it for "DFID" failed. %ld\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid), PTR_ERR(it));
+ RETURN(PTR_ERR(it));
+ }
+
+ rc = iops->load(env, it, 0);
+ if (rc < 0) {
+ CWARN("%s: Load first entry for "DFID" failed. %d\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid), rc);
+ GOTO(out, rc);
+ } else if (rc == 0) {
+ rc = iops->next(env, it);
+ if (rc != 0)
+ GOTO(out, rc = (rc < 0) ? rc : 0);
+ }
+
+ do {
+ key = iops->key(env, it);
+ if (IS_ERR(key)) {
+ CWARN("%s: Error key for "DFID". %ld\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid),
+ PTR_ERR(key));
+ GOTO(out, rc = PTR_ERR(key));
+ }
+
+ /* skip the root user/group */
+ if (*((__u64 *)key) == 0)
+ goto next;
+
+ qid->qid_uid = *((__u64 *)key);
+
+ lqe = lqe_locate(env, qqi->qqi_site, qid);
+ if (IS_ERR(lqe)) {
+ CWARN("%s: failed to locate lqe. "DFID", %ld\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid),
+ PTR_ERR(lqe));
+ GOTO(out, rc = PTR_ERR(lqe));
+ }
+
+ rc = qsd_refresh_usage(env, lqe);
+ if (rc) {
+ CWARN("%s: failed to get usage. "DFID", %d\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid), rc);
+ lqe_putref(lqe);
+ GOTO(out, rc);
+ }
+
+ rc = qsd_adjust(env, lqe);
+ lqe_putref(lqe);
+ if (rc) {
+ CWARN("%s: failed to report quota. "DFID", %d\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid), rc);
+ GOTO(out, rc);
+ }
+next:
+ rc = iops->next(env, it);
+ if (rc < 0)
+ CWARN("%s: failed to parse index, ->next error:%d "DFID
+ "\n", qsd->qsd_svname, rc, PFID(&qqi->qqi_fid));
+ } while (rc == 0);
+
+ /* reach the end */
+ if (rc > 0)
+ rc = 0;
+out:
+ iops->put(env, it);
+ iops->fini(env, it);
+ RETURN(rc);
+}
+
+static int qsd_connected(struct qsd_instance *qsd)
+{
+ int connected;
+
+ read_lock(&qsd->qsd_lock);
+ connected = qsd->qsd_exp_valid ? 1 : 0;
+ read_unlock(&qsd->qsd_lock);
+
+ return connected;
+}
+
+static int qsd_started(struct qsd_instance *qsd)
+{
+ int started;
+
+ read_lock(&qsd->qsd_lock);
+ started = qsd->qsd_started ? 1 : 0;
+ read_unlock(&qsd->qsd_lock);
+
+ return started;
+}
+
+/*
+ * Routine executed by the reintegration thread.
+ */
+static int qsd_reint_main(void *args)
+{
+ struct lu_env *env;
+ struct qsd_thread_info *qti;
+ struct qsd_qtype_info *qqi = (struct qsd_qtype_info *)args;
+ struct qsd_instance *qsd = qqi->qqi_qsd;
+ struct ptlrpc_thread *thread = &qqi->qqi_reint_thread;
+ struct l_wait_info lwi = { 0 };
+ int rc;
+ ENTRY;
+
+ CDEBUG(D_QUOTA, "%s: Starting reintegration thread for "DFID"\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid));
+
+ qqi_getref(qqi);
+ lu_ref_add(&qqi->qqi_reference, "reint_thread", thread);
+
+ thread_set_flags(thread, SVC_RUNNING);
+ wake_up(&thread->t_ctl_waitq);
+
+ OBD_ALLOC_PTR(env);
+ if (env == NULL)
+ GOTO(out, rc = -ENOMEM);
+
+ /* initialize environment */
+ rc = lu_env_init(env, LCT_DT_THREAD);
+ if (rc)
+ GOTO(out_env, rc);
+ qti = qsd_info(env);
+
+ /* wait for the connection to master established */
+ l_wait_event(thread->t_ctl_waitq,
+ qsd_connected(qsd) || !thread_is_running(thread), &lwi);
+
+ /* Step 1: enqueue global index lock */
+ if (!thread_is_running(thread))
+ GOTO(out_env_init, rc = 0);
+
+ LASSERT(qsd->qsd_exp != NULL);
+ LASSERT(qqi->qqi_glb_uptodate == 0 || qqi->qqi_slv_uptodate == 0);
+
+ memset(&qti->qti_lvb, 0, sizeof(qti->qti_lvb));
+
+ read_lock(&qsd->qsd_lock);
+ /* check whether we already own a global quota lock for this type */
+ if (lustre_handle_is_used(&qqi->qqi_lockh) &&
+ ldlm_lock_addref_try(&qqi->qqi_lockh, qsd_glb_einfo.ei_mode) == 0) {
+ read_unlock(&qsd->qsd_lock);
+ /* force refresh of global & slave index copy */
+ qti->qti_lvb.lvb_glb_ver = ~0ULL;
+ qti->qti_slv_ver = ~0ULL;
+ } else {
+ /* no valid lock found, let's enqueue a new one */
+ read_unlock(&qsd->qsd_lock);
+
+ memset(&qti->qti_body, 0, sizeof(qti->qti_body));
+ memcpy(&qti->qti_body.qb_fid, &qqi->qqi_fid,
+ sizeof(qqi->qqi_fid));
+
+ rc = qsd_intent_lock(env, qsd->qsd_exp, &qti->qti_body, true,
+ IT_QUOTA_CONN, qsd_reint_completion, qqi,
+ &qti->qti_lvb, (void *)&qti->qti_slv_ver);
+ if (rc)
+ GOTO(out_env_init, rc);
+
+ CDEBUG(D_QUOTA, "%s: glb_ver:"LPU64"/"LPU64",slv_ver:"LPU64"/"
+ LPU64"\n", qsd->qsd_svname,
+ qti->qti_lvb.lvb_glb_ver, qqi->qqi_glb_ver,
+ qti->qti_slv_ver, qqi->qqi_slv_ver);
+ }
+
+ /* Step 2: reintegrate global index */
+ if (!thread_is_running(thread))
+ GOTO(out_lock, rc = 0);
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_QUOTA_DELAY_REINT, 10);
+
+ if (qqi->qqi_glb_ver != qti->qti_lvb.lvb_glb_ver) {
+ rc = qsd_reint_index(env, qqi, true);
+ if (rc) {
+ CWARN("%s: reint global for "DFID" failed. %d\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid), rc);
+ GOTO(out_lock, rc);
+ }
+ } else {
+ qsd_bump_version(qqi, qqi->qqi_glb_ver, true);
+ }
+
+ /* Step 3: reintegrate slave index */
+ if (!thread_is_running(thread))
+ GOTO(out_lock, rc = 0);
+
+ if (qqi->qqi_slv_ver != qti->qti_slv_ver) {
+ rc = qsd_reint_index(env, qqi, false);
+ if (rc) {
+ CWARN("%s: reintegration for "DFID" failed with %d\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_slv_fid), rc);
+ GOTO(out_lock, rc);
+ }
+ } else {
+ qsd_bump_version(qqi, qqi->qqi_slv_ver, false);
+ }
+
+ /* wait for the qsd instance started (target recovery done) */
+ l_wait_event(thread->t_ctl_waitq,
+ qsd_started(qsd) || !thread_is_running(thread), &lwi);
+
+ if (!thread_is_running(thread))
+ GOTO(out_lock, rc = 0);
+
+ /* Step 4: start reconciliation for each enforced ID */
+ rc = qsd_reconciliation(env, qqi);
+ if (rc)
+ CWARN("%s: reconciliation for "DFID" failed with %d\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_slv_fid), rc);
+
+ EXIT;
+out_lock:
+ ldlm_lock_decref(&qqi->qqi_lockh, qsd_glb_einfo.ei_mode);
+out_env_init:
+ lu_env_fini(env);
+out_env:
+ OBD_FREE_PTR(env);
+out:
+ write_lock(&qsd->qsd_lock);
+ qqi->qqi_reint = 0;
+ write_unlock(&qsd->qsd_lock);
+
+ qqi_putref(qqi);
+ lu_ref_del(&qqi->qqi_reference, "reint_thread", thread);
+
+ thread_set_flags(thread, SVC_STOPPED);
+ wake_up(&thread->t_ctl_waitq);
+ return rc;
+}
+
void qsd_stop_reint_thread(struct qsd_qtype_info *qqi)
{
+ struct ptlrpc_thread *thread = &qqi->qqi_reint_thread;
+ struct l_wait_info lwi = { 0 };
+
+ if (!thread_is_stopped(thread)) {
+ thread_set_flags(thread, SVC_STOPPING);
+ wake_up(&thread->t_ctl_waitq);
+
+ l_wait_event(thread->t_ctl_waitq,
+ thread_is_stopped(thread), &lwi);
+ }
+}
+
+static int qsd_entry_iter_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
+ struct hlist_node *hnode, void *data)
+{
+ struct lquota_entry *lqe;
+ int *pending = (int *)data;
+
+ lqe = hlist_entry(hnode, struct lquota_entry, lqe_hash);
+ LASSERT(atomic_read(&lqe->lqe_ref) > 0);
+
+ lqe_read_lock(lqe);
+ *pending += lqe->lqe_pending_req;
+ lqe_read_unlock(lqe);
+
+ return 0;
+}
+
+static bool qsd_pending_updates(struct qsd_qtype_info *qqi)
+{
+ struct qsd_instance *qsd = qqi->qqi_qsd;
+ struct qsd_upd_rec *upd;
+ struct lquota_entry *lqe, *n;
+ int dqacq = 0;
+ bool updates = false;
+ ENTRY;
+
+ /* any pending quota adjust? */
+ spin_lock(&qsd->qsd_adjust_lock);
+ list_for_each_entry_safe(lqe, n, &qsd->qsd_adjust_list, lqe_link) {
+ if (lqe2qqi(lqe) == qqi) {
+ list_del_init(&lqe->lqe_link);
+ lqe_putref(lqe);
+ }
+ }
+ spin_unlock(&qsd->qsd_adjust_lock);
+
+ /* any pending updates? */
+ read_lock(&qsd->qsd_lock);
+ list_for_each_entry(upd, &qsd->qsd_upd_list, qur_link) {
+ if (upd->qur_qqi == qqi) {
+ read_unlock(&qsd->qsd_lock);
+ CDEBUG(D_QUOTA, "%s: pending %s updates for type:%d.\n",
+ qsd->qsd_svname,
+ upd->qur_global ? "global" : "slave",
+ qqi->qqi_qtype);
+ GOTO(out, updates = true);
+ }
+ }
+ read_unlock(&qsd->qsd_lock);
+
+ /* any pending quota request? */
+ cfs_hash_for_each_safe(qqi->qqi_site->lqs_hash, qsd_entry_iter_cb,
+ &dqacq);
+ if (dqacq) {
+ CDEBUG(D_QUOTA, "%s: pending dqacq for type:%d.\n",
+ qsd->qsd_svname, qqi->qqi_qtype);
+ updates = true;
+ }
+ EXIT;
+out:
+ if (updates)
+ CERROR("%s: Delaying reintegration for qtype:%d until pending "
+ "updates are flushed.\n",
+ qsd->qsd_svname, qqi->qqi_qtype);
+ return updates;
}
int qsd_start_reint_thread(struct qsd_qtype_info *qqi)
{
+ struct ptlrpc_thread *thread = &qqi->qqi_reint_thread;
+ struct qsd_instance *qsd = qqi->qqi_qsd;
+ struct l_wait_info lwi = { 0 };
+ struct task_struct *task;
+ int rc;
+ char *name;
+ ENTRY;
+
+ /* don't bother to do reintegration when quota isn't enabled */
+ if (!qsd_type_enabled(qsd, qqi->qqi_qtype))
+ RETURN(0);
+
+ if (qsd->qsd_acct_failed)
+ /* no space accounting support, can't enable enforcement */
+ RETURN(0);
+
+ /* check if the reintegration has already started or finished */
+ write_lock(&qsd->qsd_lock);
+
+ if ((qqi->qqi_glb_uptodate && qqi->qqi_slv_uptodate) ||
+ qqi->qqi_reint || qsd->qsd_stopping) {
+ write_unlock(&qsd->qsd_lock);
+ RETURN(0);
+ }
+ qqi->qqi_reint = 1;
+
+ write_unlock(&qsd->qsd_lock);
+
+ /* there could be some unfinished global or index entry updates
+ * (very unlikely), to avoid them messing up with the reint
+ * procedure, we just return and try to re-start reint later. */
+ if (qsd_pending_updates(qqi)) {
+ write_lock(&qsd->qsd_lock);
+ qqi->qqi_reint = 0;
+ write_unlock(&qsd->qsd_lock);
+ RETURN(0);
+ }
+
+ OBD_ALLOC(name, MTI_NAME_MAXLEN);
+ if (name == NULL)
+ RETURN(-ENOMEM);
+
+ snprintf(name, MTI_NAME_MAXLEN, "qsd_reint_%d.%s",
+ qqi->qqi_qtype, qsd->qsd_svname);
+
+ task = kthread_run(qsd_reint_main, qqi, name);
+ OBD_FREE(name, MTI_NAME_MAXLEN);
+
+ if (IS_ERR(task)) {
+ rc = PTR_ERR(task);
+ thread_set_flags(thread, SVC_STOPPED);
+ write_lock(&qsd->qsd_lock);
+ qqi->qqi_reint = 0;
+ write_unlock(&qsd->qsd_lock);
+ RETURN(rc);
+ }
+
+ l_wait_event(thread->t_ctl_waitq,
+ thread_is_running(thread) || thread_is_stopped(thread),
+ &lwi);
RETURN(0);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff