* GPL HEADER END
*/
/*
- * Copyright (c) 2012 Whamcloud, Inc.
+ * Copyright (c) 2012, 2017, 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>
*/
/*
* 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 EXPORT_SYMTAB
-#endif
-
#define DEBUG_SUBSYSTEM S_LQUOTA
+#include <obd_class.h>
#include "qsd_internal.h"
+struct kmem_cache *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)
+static int qsd_state_seq_show(struct seq_file *m, void *data)
+{
+ struct qsd_instance *qsd = m->private;
+ 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 (qsd_type_enabled(qsd, PRJQUOTA))
+ strncat(enabled, "p", 1);
+ if (strlen(enabled) == 0)
+ strcat(enabled, "none");
+
+ seq_printf(m, "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) {
+ memset(enabled, 0, sizeof(enabled));
+ if (qsd->qsd_type_array[USRQUOTA]->qqi_acct_obj != NULL)
+ strcat(enabled, "u");
+ if (qsd->qsd_type_array[GRPQUOTA]->qqi_acct_obj != NULL)
+ strcat(enabled, "g");
+ if (qsd->qsd_type_array[PRJQUOTA]->qqi_acct_obj != NULL)
+ strncat(enabled, "p", 1);
+ if (strlen(enabled) == 0)
+ strcat(enabled, "none");
+ seq_printf(m, "space acct: %s\n"
+ "user uptodate: glb[%d],slv[%d],reint[%d]\n"
+ "group uptodate: glb[%d],slv[%d],reint[%d]\n"
+ "project uptodate: glb[%d],slv[%d],reint[%d]\n",
+ enabled,
+ 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,
+ qsd->qsd_type_array[PRJQUOTA]->qqi_glb_uptodate,
+ qsd->qsd_type_array[PRJQUOTA]->qqi_slv_uptodate,
+ qsd->qsd_type_array[PRJQUOTA]->qqi_reint);
+ }
+ return 0;
+}
+LPROC_SEQ_FOPS_RO(qsd_state);
+
+static int qsd_enabled_seq_show(struct seq_file *m, void *data)
+{
+ struct qsd_instance *qsd = m->private;
+ char enabled[5];
+
+ LASSERT(qsd != NULL);
+
+ memset(enabled, 0, sizeof(enabled));
+ if (qsd_type_enabled(qsd, USRQUOTA))
+ strncat(enabled, "u", sizeof(enabled) - strlen(enabled));
+ if (qsd_type_enabled(qsd, GRPQUOTA))
+ strncat(enabled, "g", sizeof(enabled) - strlen(enabled));
+ if (qsd_type_enabled(qsd, PRJQUOTA))
+ strncat(enabled, "p", sizeof(enabled) - strlen(enabled));
+ if (strlen(enabled) == 0)
+ strncat(enabled, "none", sizeof(enabled) - strlen(enabled));
+
+ seq_printf(m, "%s\n", enabled);
+ return 0;
+}
+
+static ssize_t qsd_enabled_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
+{
+ struct seq_file *m = file->private_data;
+ struct qsd_instance *qsd = m->private;
+ char fsname[LUSTRE_MAXFSNAME + 1];
+ int enabled = 0;
+ char valstr[5];
+ int pool, rc;
+
+ if (count > 4)
+ return -E2BIG;
+
+ if (copy_from_user(valstr, buffer, count))
+ GOTO(out, count = -EFAULT);
+
+ if (strchr(valstr, 'u'))
+ enabled |= BIT(USRQUOTA);
+ if (strchr(valstr, 'g'))
+ enabled |= BIT(GRPQUOTA);
+ if (strchr(valstr, 'p'))
+ enabled |= BIT(PRJQUOTA);
+
+ if (enabled == 0 && strcmp(valstr, "none"))
+ GOTO(out, count = -EINVAL);
+
+ if (qsd->qsd_is_md)
+ pool = LQUOTA_RES_MD;
+ else
+ pool = LQUOTA_RES_DT;
+
+ if (server_name2fsname(qsd->qsd_svname, fsname, NULL))
+ GOTO(out, count = -EINVAL);
+
+ rc = qsd_config(valstr, fsname, pool);
+ if (rc)
+ count = rc;
+out:
+ return count;
+}
+LPROC_SEQ_FOPS(qsd_enabled);
+
+/* force reintegration procedure to be executed.
+ * Used for test/debugging purpose */
+static ssize_t
+lprocfs_force_reint_seq_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *off)
+{
+ struct qsd_instance *qsd = ((struct seq_file *)file->private_data)->private;
+ int rc = 0, qtype;
+
+ LASSERT(qsd != NULL);
+
+ write_lock(&qsd->qsd_lock);
+ if (qsd->qsd_stopping) {
+ /* don't mess up with shutdown procedure, it is already
+ * complicated enough */
+ rc = -ESHUTDOWN;
+ } else if (!qsd->qsd_prepared) {
+ rc = -EAGAIN;
+ } else {
+ /* mark all indexes as stale */
+ for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
+ qsd->qsd_type_array[qtype]->qqi_glb_uptodate = false;
+ qsd->qsd_type_array[qtype]->qqi_slv_uptodate = false;
+ }
+ }
+ write_unlock(&qsd->qsd_lock);
+
+ if (rc)
+ return rc;
+
+ /* kick off reintegration */
+ for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
+ rc = qsd_start_reint_thread(qsd->qsd_type_array[qtype]);
+ if (rc)
+ break;
+ }
+ return rc == 0 ? count : rc;
+}
+LPROC_SEQ_FOPS_WR_ONLY(qsd, force_reint);
+
+static int qsd_timeout_seq_show(struct seq_file *m, void *data)
+{
+ struct qsd_instance *qsd = m->private;
+ LASSERT(qsd != NULL);
+
+ seq_printf(m, "%d\n", qsd_wait_timeout(qsd));
+ return 0;
+}
+
+static ssize_t
+qsd_timeout_seq_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *off)
{
- struct qsd_instance *qsd = (struct qsd_instance *)data;
+ struct qsd_instance *qsd = ((struct seq_file *)file->private_data)->private;
+ time64_t timeout;
+ int rc;
LASSERT(qsd != NULL);
+ rc = kstrtoll_from_user(buffer, count, 0, &timeout);
+ if (rc)
+ return rc;
- return snprintf(page, count,
- "target name: %s\n"
- "quota enabled: none\n",
- qsd->qsd_svname);
+ if (timeout < 0)
+ return -EINVAL;
+
+ qsd->qsd_timeout = timeout;
+ return count;
}
+LPROC_SEQ_FOPS(qsd_timeout);
static struct lprocfs_vars lprocfs_quota_qsd_vars[] = {
- { "info", lprocfs_qsd_rd_state, 0, 0},
+ { .name = "info",
+ .fops = &qsd_state_fops },
+ { .name = "enabled",
+ .fops = &qsd_enabled_fops },
+ { .name = "force_reint",
+ .fops = &qsd_force_reint_fops },
+ { .name = "timeout",
+ .fops = &qsd_timeout_fops },
{ 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);
+
+ qsd->qsd_ns = class_exp2obd(qsd->qsd_exp)->obd_namespace;
+
+ write_lock(&qsd->qsd_lock);
+ /* notify that qsd_exp is now valid */
+ qsd->qsd_exp_valid = true;
+ 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 < LL_MAXQUOTAS; type++) {
+ struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
+ wake_up(&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.
int qtype)
{
struct qsd_qtype_info *qqi;
+ int repeat = 0;
ENTRY;
if (qsd->qsd_type_array[qtype] == NULL)
qqi = qsd->qsd_type_array[qtype];
qsd->qsd_type_array[qtype] = NULL;
+ /* all deferred work lists should be empty */
+ LASSERT(list_empty(&qqi->qqi_deferred_glb));
+ LASSERT(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;
+ }
+
+ /* The qqi may still be holding by global locks which are being
+ * canceled asynchronously (LU-4365), see the following steps:
+ *
+ * - On server umount, we try to clear all quota locks first by
+ * disconnecting LWP (which will invalidate import and cleanup
+ * all locks on it), however, if quota reint process is holding
+ * the global lock for reintegration at that time, global lock
+ * will fail to be cleared on LWP disconnection.
+ *
+ * - Umount process goes on and stops reint process, the global
+ * lock will be dropped on reint process exit, however, the lock
+ * cancel in done in asynchronous way, so the
+ * qsd_glb_blocking_ast() might haven't been called yet when we
+ * get here.
+ */
+ while (atomic_read(&qqi->qqi_ref) > 1) {
+ CDEBUG(D_QUOTA, "qqi reference count %u, repeat: %d\n",
+ atomic_read(&qqi->qqi_ref), repeat);
+ repeat++;
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(1));
+ }
+
+ /* by now, all qqi users should have gone away */
+ LASSERT(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);
+ dt_object_put(env, qqi->qqi_acct_obj);
qqi->qqi_acct_obj = NULL;
}
+ /* release slv index */
+ if (qqi->qqi_slv_obj != NULL && !IS_ERR(qqi->qqi_slv_obj)) {
+ dt_object_put(env, qqi->qqi_slv_obj);
+ 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)) {
+ dt_object_put(env, qqi->qqi_glb_obj);
+ qqi->qqi_glb_obj = NULL;
+ qqi->qqi_glb_ver = 0;
+ }
+
OBD_FREE_PTR(qqi);
EXIT;
}
+static const char *qtype2acct_name(int qtype)
+{
+ static char unknown[24];
+
+ switch (qtype) {
+ case USRQUOTA:
+ return "acct_user";
+ case GRPQUOTA:
+ return "acct_group";
+ case PRJQUOTA:
+ return "acct_project";
+ }
+
+ snprintf(unknown, sizeof(unknown), "acct_unknown_%u", qtype);
+ return unknown;
+}
+
+static const char *qtype2glb_name(int qtype)
+{
+ static char unknown[24];
+
+ switch (qtype) {
+ case USRQUOTA:
+ return "limit_user";
+ case GRPQUOTA:
+ return "limit_group";
+ case PRJQUOTA:
+ return "limit_project";
+ }
+
+ snprintf(unknown, sizeof(unknown), "acct_unknown_%u", qtype);
+ return unknown;
+}
+
/*
* 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;
+ 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);
+ qqi->qqi_glb_uptodate = false;
+ qqi->qqi_slv_uptodate = false;
+ qqi->qqi_reint = false;
+ init_waitqueue_head(&qqi->qqi_reint_thread.t_ctl_waitq);
+ thread_set_flags(&qqi->qqi_reint_thread, SVC_STOPPED);
+ INIT_LIST_HEAD(&qqi->qqi_deferred_glb);
+ INIT_LIST_HEAD(&qqi->qqi_deferred_slv);
+ lquota_generate_fid(&qqi->qqi_fid, qsd->qsd_pool_id,
+ QSD_RES_TYPE(qsd), qtype);
- /* 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))
+ /* open accounting object */
+ LASSERT(qqi->qqi_acct_obj == NULL);
+ qqi->qqi_acct_obj = acct_obj_lookup(env, qsd->qsd_dev, qtype);
+ if (IS_ERR(qqi->qqi_acct_obj)) {
+ CDEBUG(D_QUOTA, "%s: no %s space accounting support: rc = %ld\n",
+ qsd->qsd_svname, qtype_name(qtype),
+ PTR_ERR(qqi->qqi_acct_obj));
qqi->qqi_acct_obj = NULL;
+ qqi->qqi_acct_failed = true;
+ }
+
+ /* 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);
- /* register proc entry for accounting object */
- rc = lprocfs_seq_create(qsd->qsd_proc,
- qtype == USRQUOTA ? "acct_user" : "acct_group",
+ /* 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 & global index copy objects */
+ rc = lprocfs_seq_create(qsd->qsd_proc, qtype2acct_name(qtype),
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);
}
+ rc = lprocfs_seq_create(qsd->qsd_proc, qtype2glb_name(qtype),
+ 0444, &lprocfs_quota_seq_fops,
+ qqi->qqi_glb_obj);
+ if (rc) {
+ CERROR("%s: can't add procfs entry for global index copy %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;
+ if (unlikely(qsd == NULL))
+ RETURN_EXIT;
+
+ CDEBUG(D_QUOTA, "%s: initiating QSD shutdown\n", qsd->qsd_svname);
+ write_lock(&qsd->qsd_lock);
+ qsd->qsd_stopping = true;
+ write_unlock(&qsd->qsd_lock);
+
/* 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 < LL_MAXQUOTAS; qtype++) {
+ if (qsd->qsd_type_array[qtype] == NULL)
+ continue;
+ qsd_stop_reint_thread(qsd->qsd_type_array[qtype]);
+ }
+
+ if (qsd->qsd_ns != NULL) {
+ qsd->qsd_ns = NULL;
+ }
+
/* free per-quota type data */
- for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++)
+ for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++)
qsd_qtype_fini(env, qsd, qtype);
+ /* deregister connection to the quota master */
+ qsd->qsd_exp_valid = false;
+ lustre_deregister_lwp_item(&qsd->qsd_exp);
+
+ /* release per-filesystem information */
+ if (qsd->qsd_fsinfo != NULL) {
+ mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
+ /* remove from the list of fsinfo */
+ list_del_init(&qsd->qsd_link);
+ mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
+ qsd_put_fsinfo(qsd->qsd_fsinfo);
+ qsd->qsd_fsinfo = NULL;
+ }
+
+ /* release quota root directory */
+ if (qsd->qsd_root != NULL) {
+ dt_object_put(env, qsd->qsd_root);
+ 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 qsd_instance *qsd_init(const struct lu_env *env, char *svname,
struct dt_device *dev,
- cfs_proc_dir_entry_t *osd_proc)
+ struct proc_dir_entry *osd_proc, bool is_md)
{
+ 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 */
+ rwlock_init(&qsd->qsd_lock);
+ INIT_LIST_HEAD(&qsd->qsd_link);
+ thread_set_flags(&qsd->qsd_upd_thread, SVC_STOPPED);
+ init_waitqueue_head(&qsd->qsd_upd_thread.t_ctl_waitq);
+ INIT_LIST_HEAD(&qsd->qsd_upd_list);
+ spin_lock_init(&qsd->qsd_adjust_lock);
+ INIT_LIST_HEAD(&qsd->qsd_adjust_list);
+ qsd->qsd_prepared = false;
+ qsd->qsd_started = false;
+ qsd->qsd_is_md = is_md;
+
/* copy service name */
- strncpy(qsd->qsd_svname, svname, MAX_OBD_NAME);
+ if (strlcpy(qsd->qsd_svname, svname, sizeof(qsd->qsd_svname))
+ >= sizeof(qsd->qsd_svname))
+ GOTO(out, rc = -E2BIG);
/* grab reference on osd device */
lu_device_get(&dev->dd_lu_dev);
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 */
+ mutex_lock(&qsd->qsd_fsinfo->qfs_mutex);
+ list_add_tail(&qsd->qsd_link, &qsd->qsd_fsinfo->qfs_qsd_list);
+ mutex_unlock(&qsd->qsd_fsinfo->qfs_mutex);
+
/* register procfs directory */
- qsd->qsd_proc = lprocfs_register(QSD_DIR, osd_proc,
- lprocfs_quota_qsd_vars, qsd);
+ if (qsd->qsd_is_md)
+ qsd->qsd_proc = lprocfs_register(QSD_DIR_MD, osd_proc,
+ lprocfs_quota_qsd_vars, qsd);
+ else
+ qsd->qsd_proc = lprocfs_register(QSD_DIR_DT, osd_proc,
+ lprocfs_quota_qsd_vars, qsd);
+
+ if (type == LDD_F_SV_TYPE_MDT && qsd->qsd_is_md)
+ lprocfs_add_symlink(QSD_DIR, osd_proc, "./%s", QSD_DIR_MD);
+ else if (type == LDD_F_SV_TYPE_OST && !qsd->qsd_is_md)
+ lprocfs_add_symlink(QSD_DIR, osd_proc, "./%s", QSD_DIR_DT);
+
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);
}
-
- /* initialize per-quota type data */
- for (qtype = USRQUOTA; qtype < MAXQUOTAS; qtype++) {
- rc = qsd_qtype_init(env, qsd, qtype);
- if (rc)
- GOTO(out, rc);
- }
+ EXIT;
out:
if (rc) {
qsd_fini(env, qsd);
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;
+
+ if (unlikely(qsd == NULL))
+ RETURN(0);
+
+ read_lock(&qsd->qsd_lock);
+ if (qsd->qsd_prepared) {
+ CERROR("%s: qsd instance already prepared\n", qsd->qsd_svname);
+ rc = -EALREADY;
+ }
+ 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 (qsd->qsd_is_md)
+ 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 < LL_MAXQUOTAS; qtype++) {
+ rc = qsd_qtype_init(env, qsd, qtype);
+ if (rc)
+ RETURN(rc);
+ }
+
+ /* pools successfully setup, mark the qsd as prepared */
+ write_lock(&qsd->qsd_lock);
+ qsd->qsd_prepared = true;
+ write_unlock(&qsd->qsd_lock);
+
+ if (qsd->qsd_dev->dd_rdonly)
+ RETURN(0);
+
+ /* start reintegration thread for each type, if required */
+ for (qtype = USRQUOTA; qtype < LL_MAXQUOTAS; qtype++) {
+ struct qsd_qtype_info *qqi = qsd->qsd_type_array[qtype];
+
+ if (qsd_type_enabled(qsd, qtype) &&
+ qqi->qqi_acct_failed) {
+ LCONSOLE_ERROR("%s: can't enable quota enforcement "
+ "since space accounting isn't functional"
+ ". Please run tunefs.lustre --quota on "
+ "an unmounted filesystem if not done "
+ "already\n", qsd->qsd_svname);
+ continue;
+ }
+
+ rc = qsd_start_reint_thread(qqi);
+ if (rc) {
+ CERROR("%s: failed to start reint thread for type %s: rc = %d\n",
+ qsd->qsd_svname, qtype_name(qtype), rc);
+ RETURN(rc);
+ }
+ }
+
+ /* start writeback thread */
+ rc = qsd_start_upd_thread(qsd);
+ if (rc) {
+ CERROR("%s: failed to start writeback thread (%d)\n",
+ qsd->qsd_svname, rc);
+ RETURN(rc);
+ }
+
+ /* generate osp name */
+ rc = tgt_name2lwp_name(qsd->qsd_svname, qti->qti_buf,
+ MTI_NAME_MAXLEN, 0);
+ 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_lwp_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;
+
+ if (unlikely(qsd == NULL))
+ RETURN(0);
+
+ write_lock(&qsd->qsd_lock);
+ if (!qsd->qsd_prepared) {
+ CERROR("%s: can't start qsd instance since it wasn't 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;
+ }
+ 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 < LL_MAXQUOTAS; type++) {
+ struct qsd_qtype_info *qqi = qsd->qsd_type_array[type];
+ wake_up(&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);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff