* GPL HEADER END
*/
/*
- * Copyright (c) 2012 Whamcloud, Inc.
+ * Copyright (c) 2012 Intel, Inc.
* 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>
*/
/*
* Quota Slave Driver (QSD) management.
+ *
+ * The quota slave feature is implemented under the form of a library called
+ * QSD. Each OSD device should create a QSD instance via qsd_init() which will
+ * be used to manage quota enforcement for this device. This implies:
+ * - completing the reintegration procedure with the quota master (aka QMT, see
+ * qmt_dev.c) to retrieve the latest quota settings and space distribution.
+ * - managing quota locks in order to be notified of configuration changes.
+ * - acquiring space from the QMT when quota space for a given user/group is
+ * close to exhaustion.
+ * - allocating quota space to service threads for local request processing.
+ *
+ * Once the QSD instance created, the OSD device should invoke qsd_start()
+ * when recovery is completed. This notifies the QSD that we are about to
+ * process new requests on which quota should be strictly enforced.
+ * Then, qsd_op_begin/end can be used to reserve/release/pre-acquire quota space
+ * for/after each operation until shutdown where the QSD instance should be
+ * freed via qsd_fini().
*/
#ifndef EXPORT_SYMTAB
#define DEBUG_SUBSYSTEM S_LQUOTA
+#include <obd_class.h>
#include "qsd_internal.h"
+cfs_mem_cache_t *upd_kmem;
+
+struct lu_kmem_descr qsd_caches[] = {
+ {
+ .ckd_cache = &upd_kmem,
+ .ckd_name = "upd_kmem",
+ .ckd_size = sizeof(struct qsd_upd_rec)
+ },
+ {
+ .ckd_cache = NULL
+ }
+};
+
+/* define qsd thread key */
+LU_KEY_INIT_FINI(qsd, struct qsd_thread_info);
+LU_CONTEXT_KEY_DEFINE(qsd, LCT_MD_THREAD | LCT_DT_THREAD | LCT_LOCAL);
+LU_KEY_INIT_GENERIC(qsd);
+
/* some procfs helpers */
static int lprocfs_qsd_rd_state(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
struct qsd_instance *qsd = (struct qsd_instance *)data;
+ char enabled[5];
+ int rc;
LASSERT(qsd != NULL);
- return snprintf(page, count,
- "target name: %s\n"
- "quota enabled: none\n",
- qsd->qsd_svname);
+ memset(enabled, 0, sizeof(enabled));
+ if (qsd_type_enabled(qsd, USRQUOTA))
+ strcat(enabled, "u");
+ if (qsd_type_enabled(qsd, GRPQUOTA))
+ strcat(enabled, "g");
+ if (strlen(enabled) == 0)
+ strcat(enabled, "none");
+
+ rc = snprintf(page, count,
+ "target name: %s\n"
+ "pool ID: %d\n"
+ "type: %s\n"
+ "quota enabled: %s\n"
+ "conn to master: %s\n",
+ qsd->qsd_svname, qsd->qsd_pool_id,
+ qsd->qsd_is_md ? "md" : "dt", enabled,
+ qsd->qsd_exp_valid ? "setup" : "not setup yet");
+
+ if (qsd->qsd_prepared)
+ rc += snprintf(page + rc, count - rc,
+ "user uptodate: glb[%d],slv[%d],reint[%d]\n"
+ "group uptodate: glb[%d],slv[%d],reint[%d]\n",
+ qsd->qsd_type_array[USRQUOTA]->qqi_glb_uptodate,
+ qsd->qsd_type_array[USRQUOTA]->qqi_slv_uptodate,
+ qsd->qsd_type_array[USRQUOTA]->qqi_reint,
+ qsd->qsd_type_array[GRPQUOTA]->qqi_glb_uptodate,
+ qsd->qsd_type_array[GRPQUOTA]->qqi_slv_uptodate,
+ qsd->qsd_type_array[GRPQUOTA]->qqi_reint);
+ return rc;
+}
+
+static int lprocfs_qsd_rd_enabled(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct qsd_instance *qsd = (struct qsd_instance *)data;
+ char enabled[5];
+ LASSERT(qsd != NULL);
+
+ memset(enabled, 0, sizeof(enabled));
+ if (qsd_type_enabled(qsd, USRQUOTA))
+ strcat(enabled, "u");
+ if (qsd_type_enabled(qsd, GRPQUOTA))
+ strcat(enabled, "g");
+ if (strlen(enabled) == 0)
+ strcat(enabled, "none");
+
+ return snprintf(page, count, "%s\n", enabled);
}
static struct lprocfs_vars lprocfs_quota_qsd_vars[] = {
{ "info", lprocfs_qsd_rd_state, 0, 0},
+ { "enabled", lprocfs_qsd_rd_enabled, 0, 0},
{ NULL }
};
/*
+ * Callback function invoked by the OSP layer when the connection to the master
+ * has been set up.
+ *
+ * \param data - is a pointer to the qsd_instance
+ *
+ * \retval - 0 on success, appropriate error on failure
+ */
+static int qsd_conn_callback(void *data)
+{
+ struct qsd_instance *qsd = (struct qsd_instance *)data;
+ int type;
+ ENTRY;
+
+ /* qsd_exp should now be valid */
+ LASSERT(qsd->qsd_exp);
+
+ /* grab reference on namespace */
+ ldlm_namespace_get(class_exp2obd(qsd->qsd_exp)->obd_namespace);
+ qsd->qsd_ns = class_exp2obd(qsd->qsd_exp)->obd_namespace;
+
+ cfs_write_lock(&qsd->qsd_lock);
+ /* notify that qsd_exp is now valid */
+ qsd->qsd_exp_valid = true;
+ cfs_write_unlock(&qsd->qsd_lock);
+
+ /* Now that the connection to master is setup, we can initiate the
+ * reintegration procedure for quota types which are enabled.
+ * It is worth noting that, if the qsd_instance hasn't been started
+ * already, then we can only complete the first two steps of the
+ * reintegration procedure (i.e. global lock enqueue and slave
+ * index transfer) since the space usage reconciliation (i.e.
+ * step 3) will have to wait for qsd_start() to be called */
+ for (type = USRQUOTA; type < MAXQUOTAS; type++) {
+ struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
+ cfs_waitq_signal(&qqi->qqi_reint_thread.t_ctl_waitq);
+ }
+
+ RETURN(0);
+}
+
+/*
* Release qsd_qtype_info structure which contains data associated with a
* given quota type. This releases the accounting objects.
* It's called on OSD cleanup when the qsd instance is released.
qqi = qsd->qsd_type_array[qtype];
qsd->qsd_type_array[qtype] = NULL;
+ /* all deferred work lists should be empty */
+ LASSERT(cfs_list_empty(&qqi->qqi_deferred_glb));
+ LASSERT(cfs_list_empty(&qqi->qqi_deferred_slv));
+
+ /* shutdown lquota site */
+ if (qqi->qqi_site != NULL && !IS_ERR(qqi->qqi_site)) {
+ lquota_site_free(env, qqi->qqi_site);
+ qqi->qqi_site = NULL;
+ }
+
+ /* by now, all qqi users should have gone away */
+ LASSERT(cfs_atomic_read(&qqi->qqi_ref) == 1);
+ lu_ref_fini(&qqi->qqi_reference);
+
/* release accounting object */
if (qqi->qqi_acct_obj != NULL && !IS_ERR(qqi->qqi_acct_obj)) {
lu_object_put(env, &qqi->qqi_acct_obj->do_lu);
qqi->qqi_acct_obj = NULL;
}
+ /* release slv index */
+ if (qqi->qqi_slv_obj != NULL && !IS_ERR(qqi->qqi_slv_obj)) {
+ lu_object_put(env, &qqi->qqi_slv_obj->do_lu);
+ qqi->qqi_slv_obj = NULL;
+ qqi->qqi_slv_ver = 0;
+ }
+
+ /* release global index */
+ if (qqi->qqi_glb_obj != NULL && !IS_ERR(qqi->qqi_glb_obj)) {
+ lu_object_put(env, &qqi->qqi_glb_obj->do_lu);
+ qqi->qqi_glb_obj = NULL;
+ qqi->qqi_glb_ver = 0;
+ }
+
OBD_FREE_PTR(qqi);
EXIT;
}
/*
* Allocate and initialize a qsd_qtype_info structure for quota type \qtype.
* This opens the accounting object and initializes the proc file.
- * It's called on OSD start when the qsd instance is created.
+ * It's called on OSD start when the qsd_prepare() is invoked on the qsd
+ * instance.
*
* \param env - the environment passed by the caller
* \param qsd - is the qsd instance which will be in charge of the new
{
struct qsd_qtype_info *qqi;
int rc;
+ struct obd_uuid uuid;
ENTRY;
LASSERT(qsd->qsd_type_array[qtype] == NULL);
if (qqi == NULL)
RETURN(-ENOMEM);
qsd->qsd_type_array[qtype] = qqi;
+ cfs_atomic_set(&qqi->qqi_ref, 1); /* referenced from qsd */
/* set backpointer and other parameters */
qqi->qqi_qsd = qsd;
qqi->qqi_qtype = qtype;
+ lu_ref_init(&qqi->qqi_reference);
+ lquota_generate_fid(&qqi->qqi_fid, qsd->qsd_pool_id, QSD_RES_TYPE(qsd),
+ qtype);
+ qqi->qqi_glb_uptodate = false;
+ qqi->qqi_slv_uptodate = false;
+ qqi->qqi_reint = false;
+ cfs_waitq_init(&qqi->qqi_reint_thread.t_ctl_waitq);
+ thread_set_flags(&qqi->qqi_reint_thread, SVC_STOPPED);
+ CFS_INIT_LIST_HEAD(&qqi->qqi_deferred_glb);
+ CFS_INIT_LIST_HEAD(&qqi->qqi_deferred_slv);
+ memset(&qqi->qqi_lockh, 0, sizeof(qqi->qqi_lockh));
- /* open accounting object */
- LASSERT(qqi->qqi_acct_obj == NULL);
- qqi->qqi_acct_obj = acct_obj_lookup(env, qsd->qsd_dev,
- qtype == USRQUOTA ? ACCT_USER_OID
- : ACCT_GROUP_OID);
- /* don't print any error message on failure in order not to confuse
- * non-OFD user (e.g. 2.3 MDT stack) */
- if (IS_ERR(qqi->qqi_acct_obj))
- qqi->qqi_acct_obj = NULL;
+ /* open accounting object */
+ LASSERT(qqi->qqi_acct_obj == NULL);
+ qqi->qqi_acct_obj = acct_obj_lookup(env, qsd->qsd_dev, qtype);
+ if (qqi->qqi_acct_obj == NULL) {
+ LCONSOLE_ERROR("%s: No %s space accounting support. Please use "
+ "tunefs.lustre --quota option to enable quota "
+ "accounting.\n",
+ qsd->qsd_svname, QTYPE_NAME(qtype));
+ GOTO(out, rc = -ENOENT);
+ }
+
+ /* open global index copy */
+ LASSERT(qqi->qqi_glb_obj == NULL);
+ qqi->qqi_glb_obj = lquota_disk_glb_find_create(env, qsd->qsd_dev,
+ qsd->qsd_root,
+ &qqi->qqi_fid, true);
+ if (IS_ERR(qqi->qqi_glb_obj)) {
+ CERROR("%s: can't open global index copy "DFID" %ld\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid),
+ PTR_ERR(qqi->qqi_glb_obj));
+ GOTO(out, rc = PTR_ERR(qqi->qqi_glb_obj));
+ }
+ qqi->qqi_glb_ver = dt_version_get(env, qqi->qqi_glb_obj);
+
+ /* open slave index copy */
+ LASSERT(qqi->qqi_slv_obj == NULL);
+ obd_str2uuid(&uuid, qsd->qsd_svname);
+ qqi->qqi_slv_obj = lquota_disk_slv_find_create(env, qsd->qsd_dev,
+ qsd->qsd_root,
+ &qqi->qqi_fid, &uuid,
+ true);
+ if (IS_ERR(qqi->qqi_slv_obj)) {
+ CERROR("%s: can't open slave index copy "DFID" %ld\n",
+ qsd->qsd_svname, PFID(&qqi->qqi_fid),
+ PTR_ERR(qqi->qqi_slv_obj));
+ GOTO(out, rc = PTR_ERR(qqi->qqi_slv_obj));
+ }
+ qqi->qqi_slv_ver = dt_version_get(env, qqi->qqi_slv_obj);
+
+ /* allocate site */
+ qqi->qqi_site = lquota_site_alloc(env, qqi, false, qtype, &qsd_lqe_ops);
+ if (IS_ERR(qqi->qqi_site)) {
+ CERROR("%s: can't allocate site "DFID" %ld\n", qsd->qsd_svname,
+ PFID(&qqi->qqi_fid), PTR_ERR(qqi->qqi_site));
+ GOTO(out, rc = PTR_ERR(qqi->qqi_site));
+ }
/* register proc entry for accounting object */
rc = lprocfs_seq_create(qsd->qsd_proc,
0444, &lprocfs_quota_seq_fops,
qqi->qqi_acct_obj);
if (rc) {
- CWARN("%s: can't add procfs entry for accounting file %d\n",
- qsd->qsd_svname, rc);
+ CERROR("%s: can't add procfs entry for accounting file %d\n",
+ qsd->qsd_svname, rc);
GOTO(out, rc);
}
-
EXIT;
out:
if (rc)
/*
* Release a qsd_instance. Companion of qsd_init(). This releases all data
- * structures associated with the quota slave.
+ * structures associated with the quota slave (on-disk objects, lquota entry
+ * tables, ...).
* This function should be called when the OSD is shutting down.
*
* \param env - is the environment passed by the caller
int qtype;
ENTRY;
+ CDEBUG(D_QUOTA, "%s: initiating QSD shutdown\n", qsd->qsd_svname);
+ cfs_write_lock(&qsd->qsd_lock);
+ qsd->qsd_stopping = true;
+ cfs_write_unlock(&qsd->qsd_lock);
+
+ /* remove from the list of fsinfo */
+ if (!cfs_list_empty(&qsd->qsd_link)) {
+ LASSERT(qsd->qsd_fsinfo != NULL);
+ cfs_down(&qsd->qsd_fsinfo->qfs_sem);
+ cfs_list_del_init(&qsd->qsd_link);
+ cfs_up(&qsd->qsd_fsinfo->qfs_sem);
+ }
+
/* remove qsd proc entry */
- if (qsd->qsd_proc != NULL && !IS_ERR(qsd->qsd_proc)) {
+ if (qsd->qsd_proc != NULL) {
lprocfs_remove(&qsd->qsd_proc);
qsd->qsd_proc = NULL;
}
+ /* stop the writeback thread */
+ qsd_stop_upd_thread(qsd);
+
+ /* shutdown the reintegration threads */
+ for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
+ if (qsd->qsd_type_array[qtype] == NULL)
+ continue;
+ qsd_stop_reint_thread(qsd->qsd_type_array[qtype]);
+ }
+
+ /* release reference on namespace */
+ if (qsd->qsd_ns != NULL) {
+ ldlm_namespace_put(qsd->qsd_ns);
+ qsd->qsd_ns = NULL;
+ }
+
/* free per-quota type data */
for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++)
qsd_qtype_fini(env, qsd, qtype);
+ /* deregister connection to the quota master */
+ qsd->qsd_exp_valid = false;
+ lustre_deregister_osp_item(&qsd->qsd_exp);
+
+ /* release per-filesystem information */
+ if (qsd->qsd_fsinfo != NULL)
+ qsd_put_fsinfo(qsd->qsd_fsinfo);
+
+ /* release quota root directory */
+ if (qsd->qsd_root != NULL) {
+ lu_object_put(env, &qsd->qsd_root->do_lu);
+ qsd->qsd_root = NULL;
+ }
+
/* release reference on dt_device */
if (qsd->qsd_dev != NULL) {
lu_ref_del(&qsd->qsd_dev->dd_lu_dev.ld_reference, "qsd", qsd);
qsd->qsd_dev = NULL;
}
+ CDEBUG(D_QUOTA, "%s: QSD shutdown completed\n", qsd->qsd_svname);
OBD_FREE_PTR(qsd);
EXIT;
}
/*
* Create a new qsd_instance to be associated with backend osd device
- * identified by \dev. For now, this function just create procfs files which
- * dumps the accounting information
+ * identified by \dev.
*
* \param env - the environment passed by the caller
* \param svname - is the service name of the OSD device creating this instance
struct dt_device *dev,
cfs_proc_dir_entry_t *osd_proc)
{
+ struct qsd_thread_info *qti = qsd_info(env);
struct qsd_instance *qsd;
- int rc, qtype;
+ int rc, type, idx;
ENTRY;
+ /* only configure qsd for MDT & OST */
+ type = server_name2index(svname, &idx, NULL);
+ if (type != LDD_F_SV_TYPE_MDT && type != LDD_F_SV_TYPE_OST)
+ RETURN(NULL);
+
/* allocate qsd instance */
OBD_ALLOC_PTR(qsd);
if (qsd == NULL)
RETURN(ERR_PTR(-ENOMEM));
+ /* generic initializations */
+ cfs_rwlock_init(&qsd->qsd_lock);
+ CFS_INIT_LIST_HEAD(&qsd->qsd_link);
+ thread_set_flags(&qsd->qsd_upd_thread, SVC_STOPPED);
+ cfs_waitq_init(&qsd->qsd_upd_thread.t_ctl_waitq);
+ CFS_INIT_LIST_HEAD(&qsd->qsd_upd_list);
+ cfs_spin_lock_init(&qsd->qsd_adjust_lock);
+ CFS_INIT_LIST_HEAD(&qsd->qsd_adjust_list);
+ qsd->qsd_prepared = false;
+ qsd->qsd_started = false;
+
/* copy service name */
strncpy(qsd->qsd_svname, svname, MAX_OBD_NAME);
lu_ref_add(&dev->dd_lu_dev.ld_reference, "qsd", qsd);
qsd->qsd_dev = dev;
+ /* we only support pool ID 0 (default data or metadata pool) for the
+ * time being. A different pool ID could be assigned to this target via
+ * the configuration log in the future */
+ qsd->qsd_pool_id = 0;
+
+ /* get fsname from svname */
+ rc = server_name2fsname(svname, qti->qti_buf, NULL);
+ if (rc) {
+ CERROR("%s: fail to extract filesystem name\n", svname);
+ GOTO(out, rc);
+ }
+
+ /* look up quota setting for the filesystem the target belongs to */
+ qsd->qsd_fsinfo = qsd_get_fsinfo(qti->qti_buf, 1);
+ if (qsd->qsd_fsinfo == NULL) {
+ CERROR("%s: failed to locate filesystem information\n", svname);
+ GOTO(out, rc = -EINVAL);
+ }
+
+ /* add in the list of lquota_fsinfo */
+ cfs_down(&qsd->qsd_fsinfo->qfs_sem);
+ list_add_tail(&qsd->qsd_link, &qsd->qsd_fsinfo->qfs_qsd_list);
+ cfs_up(&qsd->qsd_fsinfo->qfs_sem);
+
/* register procfs directory */
qsd->qsd_proc = lprocfs_register(QSD_DIR, osd_proc,
lprocfs_quota_qsd_vars, qsd);
if (IS_ERR(qsd->qsd_proc)) {
rc = PTR_ERR(qsd->qsd_proc);
+ qsd->qsd_proc = NULL;
CERROR("%s: fail to create quota slave proc entry (%d)\n",
svname, rc);
GOTO(out, rc);
}
+ EXIT;
+out:
+ if (rc) {
+ qsd_fini(env, qsd);
+ return ERR_PTR(rc);
+ }
+ RETURN(qsd);
+}
+EXPORT_SYMBOL(qsd_init);
+
+/*
+ * Initialize on-disk structures in order to manage quota enforcement for
+ * the target associated with the qsd instance \qsd and starts the reintegration
+ * procedure for each quota type as soon as possible.
+ * The last step of the reintegration will be completed once qsd_start() is
+ * called, at which points the space reconciliation with the master will be
+ * executed.
+ * This function must be called when the server stack is fully configured,
+ * typically when ->ldo_prepare is called across the stack.
+ *
+ * \param env - the environment passed by the caller
+ * \param qsd - is qsd_instance to prepare
+ *
+ * \retval - 0 on success, appropriate error on failure
+ */
+int qsd_prepare(const struct lu_env *env, struct qsd_instance *qsd)
+{
+ struct qsd_thread_info *qti = qsd_info(env);
+ int qtype, rc = 0;
+ ENTRY;
+
+ LASSERT(qsd != NULL);
+
+ cfs_read_lock(&qsd->qsd_lock);
+ if (qsd->qsd_prepared) {
+ CERROR("%s: qsd instance already prepared\n", qsd->qsd_svname);
+ rc = -EALREADY;
+ }
+ cfs_read_unlock(&qsd->qsd_lock);
+ if (rc)
+ RETURN(rc);
+
+ /* Record whether this qsd instance is managing quota enforcement for a
+ * MDT (i.e. inode quota) or OST (block quota) */
+ if (lu_device_is_md(qsd->qsd_dev->dd_lu_dev.ld_site->ls_top_dev)) {
+ qsd->qsd_is_md = true;
+ qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_MD);
+ } else {
+ qsd->qsd_sync_threshold = LQUOTA_LEAST_QUNIT(LQUOTA_RES_DT);
+ }
+
+ /* look-up on-disk directory for the quota slave */
+ qsd->qsd_root = lquota_disk_dir_find_create(env, qsd->qsd_dev, NULL,
+ QSD_DIR);
+ if (IS_ERR(qsd->qsd_root)) {
+ rc = PTR_ERR(qsd->qsd_root);
+ qsd->qsd_root = NULL;
+ CERROR("%s: failed to create quota slave root dir (%d)\n",
+ qsd->qsd_svname, rc);
+ RETURN(rc);
+ }
/* initialize per-quota type data */
for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
rc = qsd_qtype_init(env, qsd, qtype);
if (rc)
- GOTO(out, rc);
+ RETURN(rc);
}
-out:
+
+ /* pools successfully setup, mark the qsd as prepared */
+ cfs_write_lock(&qsd->qsd_lock);
+ qsd->qsd_prepared = true;
+ cfs_write_unlock(&qsd->qsd_lock);
+
+ /* start reintegration thread for each type, if required */
+ for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
+ struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
+
+ rc = qsd_start_reint_thread(qqi);
+ if (rc) {
+ CERROR("%s: failed to start reint thread for type %s "
+ "(%d)\n", qsd->qsd_svname, QTYPE_NAME(qtype),
+ rc);
+ RETURN(rc);
+ }
+ }
+
+ /* start writeback thread */
+ rc = qsd_start_upd_thread(qsd);
if (rc) {
- qsd_fini(env, qsd);
- return ERR_PTR(rc);
+ CERROR("%s: failed to start writeback thread (%d)\n",
+ qsd->qsd_svname, rc);
+ RETURN(rc);
}
- RETURN(qsd);
+
+ /* generate osp name */
+ rc = tgt_name2ospname((char *)qsd->qsd_svname, qti->qti_buf);
+ if (rc) {
+ CERROR("%s: failed to generate ospname (%d)\n",
+ qsd->qsd_svname, rc);
+ RETURN(rc);
+ }
+
+ /* the connection callback will start the reintegration
+ * procedure if quota is enabled */
+ rc = lustre_register_osp_item(qti->qti_buf, &qsd->qsd_exp,
+ qsd_conn_callback, (void *)qsd);
+ if (rc) {
+ CERROR("%s: fail to get connection to master (%d)\n",
+ qsd->qsd_svname, rc);
+ RETURN(rc);
+ }
+
+ RETURN(0);
+}
+EXPORT_SYMBOL(qsd_prepare);
+
+/*
+ * Start a qsd instance. This will complete the last step of the reintegration
+ * procedure as soon as possible (provided that the master is reachable).
+ * This should be called when recovery has been completed and quota should now
+ * be enforced on every operations.
+ *
+ * \param env - the environment passed by the caller
+ * \param qsd - is the qsd instance associated with the osd device to start
+ */
+int qsd_start(const struct lu_env *env, struct qsd_instance *qsd)
+{
+ int type, rc = 0;
+ ENTRY;
+
+ cfs_write_lock(&qsd->qsd_lock);
+ if (!qsd->qsd_prepared) {
+ CERROR("%s: can't start qsd instance since it was properly "
+ "initialized\n", qsd->qsd_svname);
+ rc = -EFAULT;
+ } else if (qsd->qsd_started) {
+ CERROR("%s: qsd instance already started\n", qsd->qsd_svname);
+ rc = -EALREADY;
+ } else {
+ /* notify that the qsd_instance is now started */
+ qsd->qsd_started = true;
+ }
+ cfs_write_unlock(&qsd->qsd_lock);
+
+ if (rc)
+ RETURN(rc);
+
+ /* Trigger the 3rd step of reintegration: If usage > granted, acquire
+ * up to usage; If usage < granted, release down to usage. */
+ for (type = USRQUOTA; type < MAXQUOTAS; type++) {
+ struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
+ cfs_waitq_signal(&qqi->qqi_reint_thread.t_ctl_waitq);
+ }
+
+ RETURN(rc);
+}
+EXPORT_SYMBOL(qsd_start);
+
+void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg));
+
+/*
+ * Global initialization performed at module load time
+ */
+int qsd_glb_init(void)
+{
+ int rc;
+
+ rc = lu_kmem_init(qsd_caches);
+ if (rc)
+ return rc;
+
+ qsd_key_init_generic(&qsd_thread_key, NULL);
+ lu_context_key_register(&qsd_thread_key);
+ lustre_register_quota_process_config(qsd_process_config);
+
+ return 0;
+}
+
+/*
+ * Companion of qsd_glb_init() called at module unload time
+ */
+void qsd_glb_fini(void)
+{
+ lustre_register_quota_process_config(NULL);
+ lu_kmem_fini(qsd_caches);
+ lu_context_key_degister(&qsd_thread_key);
}
-EXPORT_SYMBOL(qsd_init);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff