/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * GPL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved * Use is subject to license terms. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. * * lustre/quota/quota_context.c * * Lustre Quota Context * * Author: Niu YaWei */ #ifndef EXPORT_SYMTAB # define EXPORT_SYMTAB #endif #define DEBUG_SUBSYSTEM S_LQUOTA #include #include #include #include #include #include #include #include #include #include #include #include #include "quota_internal.h" #ifdef HAVE_QUOTA_SUPPORT static lustre_hash_ops_t lqs_hash_ops; unsigned long default_bunit_sz = 128 * 1024 * 1024; /* 128M bytes */ unsigned long default_btune_ratio = 50; /* 50 percentage */ unsigned long default_iunit_sz = 5120; /* 5120 inodes */ unsigned long default_itune_ratio = 50; /* 50 percentage */ cfs_mem_cache_t *qunit_cachep = NULL; struct list_head qunit_hash[NR_DQHASH]; spinlock_t qunit_hash_lock = SPIN_LOCK_UNLOCKED; /* please sync qunit_state with qunit_state_names */ enum qunit_state { /** * a qunit is created */ QUNIT_CREATED = 0, /** * a qunit is added into qunit hash, that means * a quota req will be sent or is flying */ QUNIT_IN_HASH = 1, /** * a qunit is removed from qunit hash, that * means a quota req is handled and comes back */ QUNIT_RM_FROM_HASH = 2, /** * qunit can wake up all threads waiting for it */ QUNIT_FINISHED = 3, }; static const char *qunit_state_names[] = { [QUNIT_CREATED] = "CREATED", [QUNIT_IN_HASH] = "IN_HASH", [QUNIT_RM_FROM_HASH] = "RM_FROM_HASH", [QUNIT_FINISHED] = "FINISHED", }; struct lustre_qunit { struct list_head lq_hash; /** Hash list in memory */ atomic_t lq_refcnt; /** Use count */ struct lustre_quota_ctxt *lq_ctxt; /** Quota context this applies to */ struct qunit_data lq_data; /** See qunit_data */ unsigned int lq_opc; /** QUOTA_DQACQ, QUOTA_DQREL */ cfs_waitq_t lq_waitq; /** Threads waiting for this qunit */ spinlock_t lq_lock; /** Protect the whole structure */ enum qunit_state lq_state; /** Present the status of qunit */ int lq_rc; /** The rc of lq_data */ }; #define QUNIT_SET_STATE(qunit, state) \ do { \ spin_lock(&qunit->lq_lock); \ QDATA_DEBUG((&qunit->lq_data), "qunit(%p) lq_state(%s->%s), " \ "lq_rc(%d)\n", \ qunit, qunit_state_names[qunit->lq_state], \ qunit_state_names[state], qunit->lq_rc); \ qunit->lq_state = state; \ spin_unlock(&qunit->lq_lock); \ } while(0) #define QUNIT_SET_STATE_AND_RC(qunit, state, rc) \ do { \ spin_lock(&qunit->lq_lock); \ qunit->lq_rc = rc; \ QDATA_DEBUG((&qunit->lq_data), "qunit(%p) lq_state(%s->%s), " \ "lq_rc(%d)\n", \ qunit, qunit_state_names[qunit->lq_state], \ qunit_state_names[state], qunit->lq_rc); \ qunit->lq_state = state; \ spin_unlock(&qunit->lq_lock); \ } while(0) int should_translate_quota (struct obd_import *imp) { ENTRY; LASSERT(imp); if (imp->imp_connect_data.ocd_connect_flags & OBD_CONNECT_QUOTA64) RETURN(0); else RETURN(1); } void qunit_cache_cleanup(void) { int i; ENTRY; spin_lock(&qunit_hash_lock); for (i = 0; i < NR_DQHASH; i++) LASSERT(list_empty(qunit_hash + i)); spin_unlock(&qunit_hash_lock); if (qunit_cachep) { int rc; rc = cfs_mem_cache_destroy(qunit_cachep); LASSERTF(rc == 0, "couldn't destroy qunit_cache slab\n"); qunit_cachep = NULL; } EXIT; } int qunit_cache_init(void) { int i; ENTRY; LASSERT(qunit_cachep == NULL); qunit_cachep = cfs_mem_cache_create("ll_qunit_cache", sizeof(struct lustre_qunit), 0, 0); if (!qunit_cachep) RETURN(-ENOMEM); spin_lock(&qunit_hash_lock); for (i = 0; i < NR_DQHASH; i++) CFS_INIT_LIST_HEAD(qunit_hash + i); spin_unlock(&qunit_hash_lock); RETURN(0); } static inline int qunit_hashfn(struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata) __attribute__((__const__)); static inline int qunit_hashfn(struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata) { unsigned int id = qdata->qd_id; unsigned int type = QDATA_IS_GRP(qdata); unsigned long tmp = ((unsigned long)qctxt >> L1_CACHE_SHIFT) ^ id; tmp = (tmp * (MAXQUOTAS - type)) % NR_DQHASH; return tmp; } /* caller must hold qunit_hash_lock */ static inline struct lustre_qunit *find_qunit(unsigned int hashent, struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata) { struct lustre_qunit *qunit = NULL; struct qunit_data *tmp; LASSERT_SPIN_LOCKED(&qunit_hash_lock); list_for_each_entry(qunit, qunit_hash + hashent, lq_hash) { tmp = &qunit->lq_data; if (qunit->lq_ctxt == qctxt && qdata->qd_id == tmp->qd_id && (qdata->qd_flags & LQUOTA_QUNIT_FLAGS) == (tmp->qd_flags & LQUOTA_QUNIT_FLAGS)) return qunit; } return NULL; } /* check_cur_qunit - check the current usage of qunit. * @qctxt: quota context * @qdata: the type of quota unit to be checked * * return: 1 - need acquire qunit; * 2 - need release qunit; * 0 - need do nothing. * < 0 - error. */ static int check_cur_qunit(struct obd_device *obd, struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata) { struct super_block *sb = qctxt->lqc_sb; unsigned long qunit_sz, tune_sz; __u64 usage, limit, limit_org, pending_write = 0; long long record = 0; struct obd_quotactl *qctl; struct lustre_qunit_size *lqs = NULL; int ret = 0; ENTRY; if (!sb_any_quota_enabled(sb)) RETURN(0); spin_lock(&qctxt->lqc_lock); if (!qctxt->lqc_valid){ spin_unlock(&qctxt->lqc_lock); RETURN(0); } spin_unlock(&qctxt->lqc_lock); OBD_ALLOC_PTR(qctl); if (qctl == NULL) RETURN(-ENOMEM); /* get fs quota usage & limit */ qctl->qc_cmd = Q_GETQUOTA; qctl->qc_id = qdata->qd_id; qctl->qc_type = QDATA_IS_GRP(qdata); ret = fsfilt_quotactl(obd, sb, qctl); if (ret) { if (ret == -ESRCH) /* no limit */ ret = 0; else CERROR("can't get fs quota usage! (rc:%d)\n", ret); GOTO(out, ret); } if (QDATA_IS_BLK(qdata)) { usage = qctl->qc_dqblk.dqb_curspace; limit = qctl->qc_dqblk.dqb_bhardlimit << QUOTABLOCK_BITS; } else { usage = qctl->qc_dqblk.dqb_curinodes; limit = qctl->qc_dqblk.dqb_ihardlimit; } /* ignore the no quota limit case; and it can avoid creating * unnecessary lqs for uid/gid */ if (!limit) GOTO(out, ret = 0); search_lqs: quota_search_lqs(qdata, NULL, qctxt, &lqs); if (!lqs) { CDEBUG(D_QUOTA, "Can't find the lustre qunit size!\n"); ret = quota_create_lqs(qdata, NULL, qctxt, &lqs); if (ret == -EALREADY) { ret = 0; goto search_lqs; } if (ret < 0) GOTO (out, ret); } spin_lock(&lqs->lqs_lock); if (QDATA_IS_BLK(qdata)) { qunit_sz = lqs->lqs_bunit_sz; tune_sz = lqs->lqs_btune_sz; pending_write = lqs->lqs_bwrite_pending * CFS_PAGE_SIZE; record = lqs->lqs_blk_rec; LASSERT(!(qunit_sz % QUOTABLOCK_SIZE)); } else { /* we didn't need change inode qunit size now */ qunit_sz = lqs->lqs_iunit_sz; tune_sz = lqs->lqs_itune_sz; pending_write = lqs->lqs_iwrite_pending; record = lqs->lqs_ino_rec; } /* we don't count the MIN_QLIMIT */ if ((limit == MIN_QLIMIT && !QDATA_IS_BLK(qdata)) || (toqb(limit) == MIN_QLIMIT && QDATA_IS_BLK(qdata))) limit = 0; usage += pending_write; limit_org = limit; /* when a releasing quota req is sent, before it returned limit is assigned a small value. limit will overflow */ if (limit + record < 0) usage -= record; else limit += record; LASSERT(qdata->qd_count == 0); if (limit <= usage + tune_sz) { while (qdata->qd_count + limit <= usage + tune_sz) qdata->qd_count += qunit_sz; ret = 1; } else if (limit > usage + qunit_sz + tune_sz && limit_org > qdata->qd_count + qunit_sz) { while (limit - qdata->qd_count > usage + qunit_sz + tune_sz && limit_org > qdata->qd_count + qunit_sz) qdata->qd_count += qunit_sz; ret = 2; /* if there are other pending writes for this uid/gid, releasing * quota is put off until the last pending write b=16645 */ if (ret == 2 && pending_write) { CDEBUG(D_QUOTA, "delay quota release\n"); ret = 0; } } CDEBUG(D_QUOTA, "type: %c, limit: "LPU64", usage: "LPU64 ", pending_write: "LPU64", record: "LPD64 ", qunit_sz: %lu, tune_sz: %lu, ret: %d.\n", QDATA_IS_BLK(qdata) ? 'b' : 'i', limit, usage, pending_write, record, qunit_sz, tune_sz, ret); LASSERT(ret == 0 || qdata->qd_count); spin_unlock(&lqs->lqs_lock); lqs_putref(lqs); EXIT; out: OBD_FREE_PTR(qctl); return ret; } /** * Compute the remaining quota for certain gid or uid b=11693 */ int compute_remquota(struct obd_device *obd, struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata, int isblk) { struct super_block *sb = qctxt->lqc_sb; __u64 usage, limit; struct obd_quotactl *qctl; int ret = QUOTA_RET_OK; ENTRY; if (!sb_any_quota_enabled(sb)) RETURN(QUOTA_RET_NOQUOTA); /* ignore root user */ if (qdata->qd_id == 0 && QDATA_IS_GRP(qdata) == USRQUOTA) RETURN(QUOTA_RET_NOLIMIT); OBD_ALLOC_PTR(qctl); if (qctl == NULL) RETURN(-ENOMEM); /* get fs quota usage & limit */ qctl->qc_cmd = Q_GETQUOTA; qctl->qc_id = qdata->qd_id; qctl->qc_type = QDATA_IS_GRP(qdata); ret = fsfilt_quotactl(obd, sb, qctl); if (ret) { if (ret == -ESRCH) /* no limit */ ret = QUOTA_RET_NOLIMIT; else CDEBUG(D_QUOTA, "can't get fs quota usage! (rc:%d)", ret); GOTO(out, ret); } usage = isblk ? qctl->qc_dqblk.dqb_curspace : qctl->qc_dqblk.dqb_curinodes; limit = isblk ? qctl->qc_dqblk.dqb_bhardlimit << QUOTABLOCK_BITS : qctl->qc_dqblk.dqb_ihardlimit; if (!limit){ /* no limit */ ret = QUOTA_RET_NOLIMIT; GOTO(out, ret); } if (limit >= usage) qdata->qd_count = limit - usage; else qdata->qd_count = 0; EXIT; out: OBD_FREE_PTR(qctl); return ret; } static struct lustre_qunit *alloc_qunit(struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata, int opc) { struct lustre_qunit *qunit = NULL; ENTRY; OBD_SLAB_ALLOC(qunit, qunit_cachep, CFS_ALLOC_IO, sizeof(*qunit)); if (qunit == NULL) RETURN(NULL); CFS_INIT_LIST_HEAD(&qunit->lq_hash); init_waitqueue_head(&qunit->lq_waitq); atomic_set(&qunit->lq_refcnt, 1); qunit->lq_ctxt = qctxt; memcpy(&qunit->lq_data, qdata, sizeof(*qdata)); qunit->lq_opc = opc; qunit->lq_lock = SPIN_LOCK_UNLOCKED; QUNIT_SET_STATE_AND_RC(qunit, QUNIT_CREATED, 0); RETURN(qunit); } static inline void free_qunit(struct lustre_qunit *qunit) { OBD_SLAB_FREE(qunit, qunit_cachep, sizeof(*qunit)); } static inline void qunit_get(struct lustre_qunit *qunit) { atomic_inc(&qunit->lq_refcnt); } static void qunit_put(struct lustre_qunit *qunit) { LASSERT(atomic_read(&qunit->lq_refcnt)); if (atomic_dec_and_test(&qunit->lq_refcnt)) free_qunit(qunit); } /* caller must hold qunit_hash_lock and release ref of qunit after using it */ static struct lustre_qunit *dqacq_in_flight(struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata) { unsigned int hashent = qunit_hashfn(qctxt, qdata); struct lustre_qunit *qunit; ENTRY; LASSERT_SPIN_LOCKED(&qunit_hash_lock); qunit = find_qunit(hashent, qctxt, qdata); if (qunit) qunit_get(qunit); RETURN(qunit); } static void insert_qunit_nolock(struct lustre_quota_ctxt *qctxt, struct lustre_qunit *qunit) { struct list_head *head; LASSERT(list_empty(&qunit->lq_hash)); qunit_get(qunit); head = qunit_hash + qunit_hashfn(qctxt, &qunit->lq_data); list_add(&qunit->lq_hash, head); QUNIT_SET_STATE(qunit, QUNIT_IN_HASH); } static void compute_lqs_after_removing_qunit(struct lustre_qunit *qunit) { struct lustre_qunit_size *lqs = NULL; quota_search_lqs(&qunit->lq_data, NULL, qunit->lq_ctxt, &lqs); if (lqs) { spin_lock(&lqs->lqs_lock); if (qunit->lq_opc == QUOTA_DQACQ) quota_compute_lqs(&qunit->lq_data, lqs, 0, 1); if (qunit->lq_opc == QUOTA_DQREL) quota_compute_lqs(&qunit->lq_data, lqs, 0, 0); spin_unlock(&lqs->lqs_lock); /* this is for quota_search_lqs */ lqs_putref(lqs); /* this is for schedule_dqacq */ lqs_putref(lqs); } } static void remove_qunit_nolock(struct lustre_qunit *qunit) { LASSERT(!list_empty(&qunit->lq_hash)); LASSERT_SPIN_LOCKED(&qunit_hash_lock); list_del_init(&qunit->lq_hash); QUNIT_SET_STATE(qunit, QUNIT_RM_FROM_HASH); qunit_put(qunit); } #define INC_QLIMIT(limit, count) (limit == MIN_QLIMIT) ? \ (limit = count) : (limit += count) static inline int is_master(struct lustre_quota_ctxt *qctxt) { return qctxt->lqc_handler ? 1 : 0; } static int schedule_dqacq(struct obd_device *obd, struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata, int opc, int wait, struct obd_trans_info *oti); static int dqacq_completion(struct obd_device *obd, struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata, int rc, int opc) { struct lustre_qunit *qunit = NULL; struct super_block *sb = qctxt->lqc_sb; int err = 0; struct quota_adjust_qunit *oqaq = NULL; int rc1 = 0; ENTRY; LASSERT(qdata); QDATA_DEBUG(qdata, "obd(%s): complete %s quota req\n", obd->obd_name, (opc == QUOTA_DQACQ) ? "acq" : "rel"); /* update local operational quota file */ if (rc == 0) { __u64 count = QUSG(qdata->qd_count, QDATA_IS_BLK(qdata)); struct obd_quotactl *qctl; __u64 *hardlimit; OBD_ALLOC_PTR(qctl); if (qctl == NULL) GOTO(out, err = -ENOMEM); /* acq/rel qunit for specified uid/gid is serialized, * so there is no race between get fs quota limit and * set fs quota limit */ qctl->qc_cmd = Q_GETQUOTA; qctl->qc_id = qdata->qd_id; qctl->qc_type = QDATA_IS_GRP(qdata); err = fsfilt_quotactl(obd, sb, qctl); if (err) { CERROR("error get quota fs limit! (rc:%d)\n", err); GOTO(out_mem, err); } if (QDATA_IS_BLK(qdata)) { qctl->qc_dqblk.dqb_valid = QIF_BLIMITS; hardlimit = &qctl->qc_dqblk.dqb_bhardlimit; } else { qctl->qc_dqblk.dqb_valid = QIF_ILIMITS; hardlimit = &qctl->qc_dqblk.dqb_ihardlimit; } CDEBUG(D_QUOTA, "hardlimt: "LPU64"\n", *hardlimit); if (*hardlimit == 0) goto out_mem; switch (opc) { case QUOTA_DQACQ: INC_QLIMIT(*hardlimit, count); break; case QUOTA_DQREL: LASSERTF(count < *hardlimit, "id(%u) flag(%u) type(%c) isblk(%c) " "count("LPU64") qd_qunit("LPU64") " "hardlimit("LPU64").\n", qdata->qd_id, qdata->qd_flags, QDATA_IS_GRP(qdata) ? 'g' : 'u', QDATA_IS_BLK(qdata) ? 'b': 'i', qdata->qd_count, qdata->qd_qunit, *hardlimit); *hardlimit -= count; break; default: LBUG(); } /* clear quota limit */ if (count == 0) *hardlimit = 0; qctl->qc_cmd = Q_SETQUOTA; err = fsfilt_quotactl(obd, sb, qctl); if (err) CERROR("error set quota fs limit! (rc:%d)\n", err); QDATA_DEBUG(qdata, "%s completion\n", opc == QUOTA_DQACQ ? "DQACQ" : "DQREL"); out_mem: OBD_FREE_PTR(qctl); } else if (rc == -EDQUOT) { QDATA_DEBUG(qdata, "acquire qunit got EDQUOT.\n"); } else if (rc == -EBUSY) { QDATA_DEBUG(qdata, "it's is recovering, got EBUSY.\n"); } else { CERROR("acquire qunit got error! (rc:%d)\n", rc); } out: /* remove the qunit from hash */ spin_lock(&qunit_hash_lock); qunit = dqacq_in_flight(qctxt, qdata); /* this qunit has been removed by qctxt_cleanup() */ if (!qunit) { spin_unlock(&qunit_hash_lock); QDATA_DEBUG(qdata, "%s is discarded because qunit isn't found\n", opc == QUOTA_DQACQ ? "DQACQ" : "DQREL"); RETURN(err); } LASSERT(opc == qunit->lq_opc); /* remove this qunit from lq_hash so that new processes cannot be added * to qunit->lq_waiters */ remove_qunit_nolock(qunit); spin_unlock(&qunit_hash_lock); compute_lqs_after_removing_qunit(qunit); /* wake up all waiters */ QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, rc); wake_up_all(&qunit->lq_waitq); /* this is for dqacq_in_flight() */ qunit_put(qunit); /* this is for alloc_qunit() */ qunit_put(qunit); if (rc < 0 && rc != -EDQUOT) RETURN(err); /* don't reschedule in such cases: * - acq/rel failure and qunit isn't changed, * but not for quota recovery. * - local dqacq/dqrel. * - local disk io failure. */ OBD_ALLOC_PTR(oqaq); if (!oqaq) RETURN(-ENOMEM); qdata_to_oqaq(qdata, oqaq); /* adjust the qunit size in slaves */ rc1 = quota_adjust_slave_lqs(oqaq, qctxt); OBD_FREE_PTR(oqaq); if (rc1 < 0) { CERROR("adjust slave's qunit size failed!(rc:%d)\n", rc1); RETURN(rc1); } if (err || (rc && rc != -EBUSY && rc1 == 0) || is_master(qctxt)) RETURN(err); /* reschedule another dqacq/dqrel if needed */ qdata->qd_count = 0; qdata->qd_flags &= LQUOTA_QUNIT_FLAGS; rc1 = check_cur_qunit(obd, qctxt, qdata); if (rc1 > 0) { int opc; opc = rc1 == 1 ? QUOTA_DQACQ : QUOTA_DQREL; rc1 = schedule_dqacq(obd, qctxt, qdata, opc, 0, NULL); QDATA_DEBUG(qdata, "reschedudle opc(%d) rc(%d)\n", opc, rc1); } RETURN(err); } struct dqacq_async_args { struct lustre_quota_ctxt *aa_ctxt; struct lustre_qunit *aa_qunit; }; static int dqacq_interpret(const struct lu_env *env, struct ptlrpc_request *req, void *data, int rc) { struct dqacq_async_args *aa = (struct dqacq_async_args *)data; struct lustre_quota_ctxt *qctxt = aa->aa_ctxt; struct obd_device_target *obt = qctxt->lqc_obt; struct lustre_qunit *qunit = aa->aa_qunit; struct obd_device *obd = req->rq_import->imp_obd; struct qunit_data *qdata = NULL; int rc1 = 0; ENTRY; LASSERT(req); LASSERT(req->rq_import); /* there are several forms of qunit(historic causes), so we need to * adjust qunit from slaves to the same form here */ OBD_ALLOC(qdata, sizeof(struct qunit_data)); if (!qdata) RETURN(-ENOMEM); down_read(&obt->obt_rwsem); /* if a quota req timeouts or is dropped, we should update quota * statistics which will be handled in dqacq_completion. And in * this situation we should get qdata from request instead of * reply */ rc1 = quota_get_qdata(req, qdata, (rc != 0) ? QUOTA_REQUEST : QUOTA_REPLY, QUOTA_IMPORT); if (rc1 < 0) { DEBUG_REQ(D_ERROR, req, "error unpacking qunit_data(rc: %d)\n", rc1); GOTO(exit, rc = rc1); } QDATA_DEBUG(qdata, "qdata: interpret rc(%d).\n", rc); QDATA_DEBUG((&qunit->lq_data), "lq_data: \n"); if (qdata->qd_id != qunit->lq_data.qd_id || OBD_FAIL_CHECK(OBD_FAIL_QUOTA_RET_QDATA)) { CDEBUG(D_ERROR, "the returned qd_id isn't expected!" "(qdata: %u, lq_data: %u)\n", qdata->qd_id, qunit->lq_data.qd_id); qdata->qd_id = qunit->lq_data.qd_id; rc = -EPROTO; } if (QDATA_IS_GRP(qdata) != QDATA_IS_GRP(&qunit->lq_data)) { CDEBUG(D_ERROR, "the returned grp/usr isn't expected!" "(qdata: %u, lq_data: %u)\n", qdata->qd_flags, qunit->lq_data.qd_flags); if (QDATA_IS_GRP(&qunit->lq_data)) QDATA_SET_GRP(qdata); else QDATA_CLR_GRP(qdata); rc = -EPROTO; } if (qdata->qd_count > qunit->lq_data.qd_count) { CDEBUG(D_ERROR, "the returned qd_count isn't expected!" "(qdata: "LPU64", lq_data: "LPU64")\n", qdata->qd_count, qunit->lq_data.qd_count); rc = -EPROTO; } rc = dqacq_completion(obd, qctxt, qdata, rc, lustre_msg_get_opc(req->rq_reqmsg)); exit: up_read(&obt->obt_rwsem); OBD_FREE(qdata, sizeof(struct qunit_data)); RETURN(rc); } /** * check if quota master is online */ int check_qm(struct lustre_quota_ctxt *qctxt) { int rc; ENTRY; spin_lock(&qctxt->lqc_lock); /* quit waiting when mds is back or qctxt is cleaned up */ rc = qctxt->lqc_import || !qctxt->lqc_valid; spin_unlock(&qctxt->lqc_lock); RETURN(rc); } static int got_qunit(struct lustre_qunit *qunit) { int rc; ENTRY; spin_lock(&qunit->lq_lock); switch (qunit->lq_state) { case QUNIT_IN_HASH: case QUNIT_RM_FROM_HASH: rc = 0; break; case QUNIT_FINISHED: rc = 1; break; default: rc = 0; CERROR("invalid qunit state %d\n", qunit->lq_state); } spin_unlock(&qunit->lq_lock); RETURN(rc); } static int schedule_dqacq(struct obd_device *obd, struct lustre_quota_ctxt *qctxt, struct qunit_data *qdata, int opc, int wait, struct obd_trans_info *oti) { struct lustre_qunit *qunit, *empty; struct l_wait_info lwi = { 0 }; struct ptlrpc_request *req; struct dqacq_async_args *aa; struct obd_import *imp = NULL; struct lustre_qunit_size *lqs = NULL; struct timeval work_start; struct timeval work_end; long timediff; int rc = 0; ENTRY; LASSERT(opc == QUOTA_DQACQ || opc == QUOTA_DQREL); do_gettimeofday(&work_start); if ((empty = alloc_qunit(qctxt, qdata, opc)) == NULL) RETURN(-ENOMEM); spin_lock(&qunit_hash_lock); qunit = dqacq_in_flight(qctxt, qdata); if (qunit) { spin_unlock(&qunit_hash_lock); qunit_put(empty); goto wait_completion; } qunit = empty; qunit_get(qunit); insert_qunit_nolock(qctxt, qunit); spin_unlock(&qunit_hash_lock); quota_search_lqs(qdata, NULL, qctxt, &lqs); if (lqs) { spin_lock(&lqs->lqs_lock); quota_compute_lqs(qdata, lqs, 1, (opc == QUOTA_DQACQ) ? 1 : 0); /* when this qdata returned from mds, it will call lqs_putref */ lqs_getref(lqs); spin_unlock(&lqs->lqs_lock); /* this is for quota_search_lqs */ lqs_putref(lqs); } else { CDEBUG(D_ERROR, "Can't find the lustre qunit size!\n"); } QDATA_DEBUG(qdata, "obd(%s): send %s quota req\n", obd->obd_name, (opc == QUOTA_DQACQ) ? "acq" : "rel"); /* master is going to dqacq/dqrel from itself */ if (is_master(qctxt)) { int rc2; QDATA_DEBUG(qdata, "local %s.\n", opc == QUOTA_DQACQ ? "DQACQ" : "DQREL"); QDATA_SET_CHANGE_QS(qdata); rc = qctxt->lqc_handler(obd, qdata, opc); rc2 = dqacq_completion(obd, qctxt, qdata, rc, opc); /* this is for qunit_get() */ qunit_put(qunit); do_gettimeofday(&work_end); timediff = cfs_timeval_sub(&work_end, &work_start, NULL); if (opc == QUOTA_DQACQ) lprocfs_counter_add(qctxt->lqc_stats, wait ? LQUOTA_SYNC_ACQ : LQUOTA_ASYNC_ACQ, timediff); else lprocfs_counter_add(qctxt->lqc_stats, wait ? LQUOTA_SYNC_REL : LQUOTA_ASYNC_REL, timediff); RETURN(rc ? rc : rc2); } spin_lock(&qctxt->lqc_lock); if (!qctxt->lqc_import) { spin_unlock(&qctxt->lqc_lock); QDATA_DEBUG(qdata, "lqc_import is invalid.\n"); spin_lock(&qunit_hash_lock); remove_qunit_nolock(qunit); spin_unlock(&qunit_hash_lock); compute_lqs_after_removing_qunit(qunit); QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, -EAGAIN); wake_up_all(&qunit->lq_waitq); /* this is for qunit_get() */ qunit_put(qunit); /* this for alloc_qunit() */ qunit_put(qunit); spin_lock(&qctxt->lqc_lock); if (wait && !qctxt->lqc_import) { spin_unlock(&qctxt->lqc_lock); LASSERT(oti && oti->oti_thread && oti->oti_thread->t_watchdog); lc_watchdog_disable(oti->oti_thread->t_watchdog); CDEBUG(D_QUOTA, "sleep for quota master\n"); l_wait_event(qctxt->lqc_wait_for_qmaster, check_qm(qctxt), &lwi); CDEBUG(D_QUOTA, "wake up when quota master is back\n"); lc_watchdog_touch(oti->oti_thread->t_watchdog); } else { spin_unlock(&qctxt->lqc_lock); } RETURN(-EAGAIN); } imp = class_import_get(qctxt->lqc_import); spin_unlock(&qctxt->lqc_lock); /* build dqacq/dqrel request */ LASSERT(imp); req = ptlrpc_request_alloc_pack(imp, &RQF_MDS_QUOTA_DQACQ, LUSTRE_MDS_VERSION, opc); class_import_put(imp); if (req == NULL) { CDEBUG(D_ERROR, "Can't alloc request\n"); dqacq_completion(obd, qctxt, qdata, -ENOMEM, opc); /* this is for qunit_get() */ qunit_put(qunit); RETURN(-ENOMEM); } ptlrpc_request_set_replen(req); req->rq_no_resend = req->rq_no_delay = 1; rc = quota_copy_qdata(req, qdata, QUOTA_REQUEST, QUOTA_IMPORT); if (rc < 0) { CDEBUG(D_ERROR, "Can't pack qunit_data(rc: %d)\n", rc); ptlrpc_req_finished(req); dqacq_completion(obd, qctxt, qdata, -EPROTO, opc); /* this is for qunit_get() */ qunit_put(qunit); RETURN(rc); } CLASSERT(sizeof(*aa) <= sizeof(req->rq_async_args)); aa = ptlrpc_req_async_args(req); aa->aa_ctxt = qctxt; aa->aa_qunit = qunit; req->rq_interpret_reply = dqacq_interpret; ptlrpcd_add_req(req, PSCOPE_OTHER); QDATA_DEBUG(qdata, "%s scheduled.\n", opc == QUOTA_DQACQ ? "DQACQ" : "DQREL"); wait_completion: if (wait && qunit) { struct qunit_data *p = &qunit->lq_data; QDATA_DEBUG(p, "qunit(%p) is waiting for dqacq.\n", qunit); l_wait_event(qunit->lq_waitq, got_qunit(qunit), &lwi); /* rc = -EAGAIN, it means a quota req is finished; * rc = -EDQUOT, it means out of quota * rc = -EBUSY, it means recovery is happening * other rc < 0, it means real errors, functions who call * schedule_dqacq should take care of this */ spin_lock(&qunit->lq_lock); if (qunit->lq_rc == 0) rc = -EAGAIN; else rc = qunit->lq_rc; spin_unlock(&qunit->lq_lock); CDEBUG(D_QUOTA, "qunit(%p) finishes waiting. (rc:%d)\n", qunit, rc); } qunit_put(qunit); do_gettimeofday(&work_end); timediff = cfs_timeval_sub(&work_end, &work_start, NULL); if (opc == QUOTA_DQACQ) lprocfs_counter_add(qctxt->lqc_stats, wait ? LQUOTA_SYNC_ACQ : LQUOTA_ASYNC_ACQ, timediff); else lprocfs_counter_add(qctxt->lqc_stats, wait ? LQUOTA_SYNC_REL : LQUOTA_ASYNC_REL, timediff); RETURN(rc); } int qctxt_adjust_qunit(struct obd_device *obd, struct lustre_quota_ctxt *qctxt, uid_t uid, gid_t gid, __u32 isblk, int wait, struct obd_trans_info *oti) { int rc = 0, i = USRQUOTA; __u32 id[MAXQUOTAS] = { uid, gid }; struct qunit_data qdata[MAXQUOTAS]; ENTRY; CLASSERT(MAXQUOTAS < 4); if (!sb_any_quota_enabled(qctxt->lqc_sb)) RETURN(0); for (i = 0; i < MAXQUOTAS; i++) { qdata[i].qd_id = id[i]; qdata[i].qd_flags = i; if (isblk) QDATA_SET_BLK(&qdata[i]); qdata[i].qd_count = 0; rc = check_cur_qunit(obd, qctxt, &qdata[i]); if (rc > 0) { int opc; /* need acquire or release */ opc = rc == 1 ? QUOTA_DQACQ : QUOTA_DQREL; rc = schedule_dqacq(obd, qctxt, &qdata[i], opc, wait,oti); if (rc < 0) RETURN(rc); } else if (wait == 1) { /* when wait equates 1, that means mds_quota_acquire * or filter_quota_acquire is calling it. */ rc = qctxt_wait_pending_dqacq(qctxt, id[i], i, isblk); if (rc < 0) RETURN(rc); } } RETURN(rc); } int qctxt_wait_pending_dqacq(struct lustre_quota_ctxt *qctxt, unsigned int id, unsigned short type, int isblk) { struct lustre_qunit *qunit = NULL; struct qunit_data qdata; struct timeval work_start; struct timeval work_end; long timediff; struct l_wait_info lwi = { 0 }; int rc = 0; ENTRY; do_gettimeofday(&work_start); qdata.qd_id = id; qdata.qd_flags = type; if (isblk) QDATA_SET_BLK(&qdata); qdata.qd_count = 0; spin_lock(&qunit_hash_lock); qunit = dqacq_in_flight(qctxt, &qdata); spin_unlock(&qunit_hash_lock); if (qunit) { struct qunit_data *p = &qunit->lq_data; QDATA_DEBUG(p, "qunit(%p) is waiting for dqacq.\n", qunit); l_wait_event(qunit->lq_waitq, got_qunit(qunit), &lwi); CDEBUG(D_QUOTA, "qunit(%p) finishes waiting. (rc:%d)\n", qunit, qunit->lq_rc); /* keep same as schedule_dqacq() b=17030 */ spin_lock(&qunit->lq_lock); if (qunit->lq_rc == 0) rc = -EAGAIN; else rc = qunit->lq_rc; spin_unlock(&qunit->lq_lock); /* this is for dqacq_in_flight() */ qunit_put(qunit); do_gettimeofday(&work_end); timediff = cfs_timeval_sub(&work_end, &work_start, NULL); lprocfs_counter_add(qctxt->lqc_stats, isblk ? LQUOTA_WAIT_PENDING_BLK_QUOTA : LQUOTA_WAIT_PENDING_INO_QUOTA, timediff); } else { do_gettimeofday(&work_end); timediff = cfs_timeval_sub(&work_end, &work_start, NULL); lprocfs_counter_add(qctxt->lqc_stats, isblk ? LQUOTA_NOWAIT_PENDING_BLK_QUOTA : LQUOTA_NOWAIT_PENDING_INO_QUOTA, timediff); } RETURN(rc); } int qctxt_init(struct obd_device *obd, dqacq_handler_t handler) { struct lustre_quota_ctxt *qctxt = &obd->u.obt.obt_qctxt; struct obd_device_target *obt = &obd->u.obt; struct super_block *sb = obt->obt_sb; int rc = 0; ENTRY; LASSERT(qctxt); rc = ptlrpcd_addref(); if (rc) RETURN(rc); cfs_waitq_init(&qctxt->lqc_wait_for_qmaster); spin_lock_init(&qctxt->lqc_lock); spin_lock(&qctxt->lqc_lock); qctxt->lqc_handler = handler; qctxt->lqc_sb = sb; qctxt->lqc_obt = obt; qctxt->lqc_import = NULL; qctxt->lqc_recovery = 0; qctxt->lqc_switch_qs = 1; /* Change qunit size in default setting */ qctxt->lqc_valid = 1; qctxt->lqc_cqs_boundary_factor = 4; qctxt->lqc_cqs_least_bunit = PTLRPC_MAX_BRW_SIZE; qctxt->lqc_cqs_least_iunit = 2; qctxt->lqc_cqs_qs_factor = 2; qctxt->lqc_flags = 0; QUOTA_MASTER_UNREADY(qctxt); qctxt->lqc_bunit_sz = default_bunit_sz; qctxt->lqc_btune_sz = default_bunit_sz / 100 * default_btune_ratio; qctxt->lqc_iunit_sz = default_iunit_sz; qctxt->lqc_itune_sz = default_iunit_sz * default_itune_ratio / 100; qctxt->lqc_switch_seconds = 300; /* enlarging will wait 5 minutes * after the last shrinking */ qctxt->lqc_sync_blk = 0; spin_unlock(&qctxt->lqc_lock); qctxt->lqc_lqs_hash = lustre_hash_init("LQS_HASH", 7, 7, &lqs_hash_ops, 0); if (!qctxt->lqc_lqs_hash) { CERROR("initialize hash lqs for %s error!\n", obd->obd_name); RETURN(-ENOMEM); } #ifdef LPROCFS rc = lquota_proc_setup(obd, is_master(qctxt)); if (rc) CERROR("initialize proc for %s error!\n", obd->obd_name); #endif RETURN(rc); } void qctxt_cleanup(struct lustre_quota_ctxt *qctxt, int force) { struct lustre_qunit *qunit, *tmp; struct list_head tmp_list; struct obd_device_target *obt = qctxt->lqc_obt; int i; ENTRY; CFS_INIT_LIST_HEAD(&tmp_list); spin_lock(&qctxt->lqc_lock); qctxt->lqc_valid = 0; spin_unlock(&qctxt->lqc_lock); spin_lock(&qunit_hash_lock); for (i = 0; i < NR_DQHASH; i++) { list_for_each_entry_safe(qunit, tmp, &qunit_hash[i], lq_hash) { if (qunit->lq_ctxt != qctxt) continue; remove_qunit_nolock(qunit); list_add(&qunit->lq_hash, &tmp_list); } } spin_unlock(&qunit_hash_lock); list_for_each_entry_safe(qunit, tmp, &tmp_list, lq_hash) { list_del_init(&qunit->lq_hash); compute_lqs_after_removing_qunit(qunit); /* wake up all waiters */ QUNIT_SET_STATE_AND_RC(qunit, QUNIT_FINISHED, 0); wake_up_all(&qunit->lq_waitq); qunit_put(qunit); } down_write(&obt->obt_rwsem); lustre_hash_exit(qctxt->lqc_lqs_hash); qctxt->lqc_lqs_hash = NULL; up_write(&obt->obt_rwsem); /* after qctxt_cleanup, qctxt might be freed, then check_qm() is * unpredicted. So we must wait until lqc_wait_for_qmaster is empty */ while (cfs_waitq_active(&qctxt->lqc_wait_for_qmaster)) { cfs_waitq_signal(&qctxt->lqc_wait_for_qmaster); cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE, cfs_time_seconds(1)); } ptlrpcd_decref(); #ifdef LPROCFS if (lquota_proc_cleanup(qctxt)) CERROR("cleanup proc error!\n"); #endif EXIT; } struct qslave_recov_thread_data { struct obd_device *obd; struct lustre_quota_ctxt *qctxt; struct completion comp; }; /* FIXME only recovery block quota by now */ static int qslave_recovery_main(void *arg) { struct qslave_recov_thread_data *data = arg; struct obd_device *obd = data->obd; struct lustre_quota_ctxt *qctxt = data->qctxt; unsigned int type; int rc = 0; ENTRY; ptlrpc_daemonize("qslave_recovd"); complete(&data->comp); if (qctxt->lqc_recovery) RETURN(0); qctxt->lqc_recovery = 1; for (type = USRQUOTA; type < MAXQUOTAS; type++) { struct qunit_data qdata; struct quota_info *dqopt = sb_dqopt(qctxt->lqc_sb); struct list_head id_list; struct dquot_id *dqid, *tmp; int ret; LOCK_DQONOFF_MUTEX(dqopt); if (!sb_has_quota_enabled(qctxt->lqc_sb, type)) { UNLOCK_DQONOFF_MUTEX(dqopt); break; } LASSERT(dqopt->files[type] != NULL); CFS_INIT_LIST_HEAD(&id_list); #ifndef KERNEL_SUPPORTS_QUOTA_READ rc = fsfilt_qids(obd, dqopt->files[type], NULL, type, &id_list); #else rc = fsfilt_qids(obd, NULL, dqopt->files[type], type, &id_list); #endif UNLOCK_DQONOFF_MUTEX(dqopt); if (rc) CERROR("Get ids from quota file failed. (rc:%d)\n", rc); list_for_each_entry_safe(dqid, tmp, &id_list, di_link) { list_del_init(&dqid->di_link); /* skip slave recovery on itself */ if (is_master(qctxt)) goto free; if (rc && rc != -EBUSY) goto free; qdata.qd_id = dqid->di_id; qdata.qd_flags = type; QDATA_SET_BLK(&qdata); qdata.qd_count = 0; ret = check_cur_qunit(obd, qctxt, &qdata); if (ret > 0) { int opc; opc = ret == 1 ? QUOTA_DQACQ : QUOTA_DQREL; rc = schedule_dqacq(obd, qctxt, &qdata, opc, 0, NULL); if (rc == -EDQUOT) rc = 0; } else { rc = 0; } if (rc) CDEBUG(rc == -EBUSY ? D_QUOTA : D_ERROR, "qslave recovery failed! (id:%d type:%d " " rc:%d)\n", dqid->di_id, type, rc); free: kfree(dqid); } } qctxt->lqc_recovery = 0; RETURN(rc); } void qslave_start_recovery(struct obd_device *obd, struct lustre_quota_ctxt *qctxt) { struct qslave_recov_thread_data data; int rc; ENTRY; if (!sb_any_quota_enabled(qctxt->lqc_sb)) goto exit; data.obd = obd; data.qctxt = qctxt; init_completion(&data.comp); rc = kernel_thread(qslave_recovery_main, &data, CLONE_VM|CLONE_FILES); if (rc < 0) { CERROR("Cannot start quota recovery thread: rc %d\n", rc); goto exit; } wait_for_completion(&data.comp); exit: EXIT; } /** * lqs<->qctxt hash operations */ /** * string hashing using djb2 hash algorithm */ static unsigned lqs_hash(lustre_hash_t *lh, void *key, unsigned mask) { struct quota_adjust_qunit *lqs_key; unsigned hash; ENTRY; LASSERT(key); lqs_key = (struct quota_adjust_qunit *)key; hash = (QAQ_IS_GRP(lqs_key) ? 5381 : 5387) * lqs_key->qaq_id; RETURN(hash & mask); } static int lqs_compare(void *key, struct hlist_node *hnode) { struct quota_adjust_qunit *lqs_key; struct lustre_qunit_size *q; int rc; ENTRY; LASSERT(key); lqs_key = (struct quota_adjust_qunit *)key; q = hlist_entry(hnode, struct lustre_qunit_size, lqs_hash); spin_lock(&q->lqs_lock); rc = ((lqs_key->qaq_id == q->lqs_id) && (QAQ_IS_GRP(lqs_key) == LQS_IS_GRP(q))); spin_unlock(&q->lqs_lock); RETURN(rc); } static void * lqs_get(struct hlist_node *hnode) { struct lustre_qunit_size *q = hlist_entry(hnode, struct lustre_qunit_size, lqs_hash); ENTRY; atomic_inc(&q->lqs_refcount); CDEBUG(D_QUOTA, "lqs=%p refcount %d\n", q, atomic_read(&q->lqs_refcount)); RETURN(q); } static void * lqs_put(struct hlist_node *hnode) { struct lustre_qunit_size *q = hlist_entry(hnode, struct lustre_qunit_size, lqs_hash); ENTRY; LASSERT(atomic_read(&q->lqs_refcount) > 0); atomic_dec(&q->lqs_refcount); CDEBUG(D_QUOTA, "lqs=%p refcount %d\n", q, atomic_read(&q->lqs_refcount)); RETURN(q); } static void lqs_exit(struct hlist_node *hnode) { struct lustre_qunit_size *q; ENTRY; q = hlist_entry(hnode, struct lustre_qunit_size, lqs_hash); /* * Nothing should be left. User of lqs put it and * lqs also was deleted from table by this time * so we should have 0 refs. */ LASSERTF(atomic_read(&q->lqs_refcount) == 0, "Busy lqs %p with %d refs\n", q, atomic_read(&q->lqs_refcount)); OBD_FREE_PTR(q); EXIT; } static lustre_hash_ops_t lqs_hash_ops = { .lh_hash = lqs_hash, .lh_compare = lqs_compare, .lh_get = lqs_get, .lh_put = lqs_put, .lh_exit = lqs_exit }; #endif /* HAVE_QUOTA_SUPPORT */