* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2016, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* lustre/target/tgt_grant.c
* \retval negative value on error
*/
int tgt_statfs_internal(const struct lu_env *env, struct lu_target *lut,
- struct obd_statfs *osfs, __u64 max_age, int *from_cache)
+ struct obd_statfs *osfs, time64_t max_age, int *from_cache)
{
struct tg_grants_data *tgd = &lut->lut_tgd;
int rc = 0;
ENTRY;
spin_lock(&tgd->tgd_osfs_lock);
- if (cfs_time_before_64(tgd->tgd_osfs_age, max_age) || max_age == 0) {
+ if (tgd->tgd_osfs_age < max_age || max_age == 0) {
u64 unstable;
/* statfs data are too old, get up-to-date one.
if (unlikely(rc))
GOTO(out, rc);
+ osfs->os_namelen = min_t(__u32, osfs->os_namelen, NAME_MAX);
+
spin_lock(&tgd->tgd_grant_lock);
spin_lock(&tgd->tgd_osfs_lock);
/* calculate how much space was written while we released the
/* finally udpate cached statfs data */
tgd->tgd_osfs = *osfs;
- tgd->tgd_osfs_age = cfs_time_current_64();
+ tgd->tgd_osfs_age = ktime_get_seconds();
tgd->tgd_statfs_inflight--; /* stop tracking */
if (tgd->tgd_statfs_inflight == 0)
struct tg_grants_data *tgd = &lut->lut_tgd;
struct tgt_thread_info *tti;
struct obd_statfs *osfs;
- __u64 max_age;
- int rc;
+ time64_t max_age;
+ int rc;
if (force)
max_age = 0; /* get fresh statfs data */
else
- max_age = cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS);
+ max_age = ktime_get_seconds() - OBD_STATFS_CACHE_SECONDS;
tti = tgt_th_info(env);
osfs = &tti->tti_u.osfs;
u64 left;
u64 avail;
u64 unstable;
+ u64 reserved;
ENTRY;
assert_spin_locked(&tgd->tgd_grant_lock);
unstable = tgd->tgd_osfs_unstable; /* those might be accounted twice */
spin_unlock(&tgd->tgd_osfs_lock);
- tot_granted = tgd->tgd_tot_granted;
+ reserved = left * tgd->tgd_reserved_pcnt / 100;
+ tot_granted = tgd->tgd_tot_granted + reserved;
if (left < tot_granted) {
int mask = (left + unstable <
tgd->tgd_grant_compat_disable) || left == 0 || exp->exp_failed)
RETURN(0);
- if (want > 0x7fffffff) {
- CERROR("%s: client %s/%p requesting > 2GB grant %llu\n",
- obd->obd_name, exp->exp_client_uuid.uuid, exp, want);
+ if (want > OBD_MAX_GRANT) {
+ CERROR("%s: client %s/%p requesting > max (%lu), %llu\n",
+ obd->obd_name, exp->exp_client_uuid.uuid, exp,
+ OBD_MAX_GRANT, want);
RETURN(0);
}
if ((grant > chunk) && conservative)
grant = chunk;
+ /*
+ * Limit grant so that export' grant does not exceed what the
+ * client would like to have by more than grants for 2 full
+ * RPCs
+ */
+ if (want + chunk <= ted->ted_grant)
+ RETURN(0);
+ if (ted->ted_grant + grant > want + chunk)
+ grant = want + chunk - ted->ted_grant;
+
tgd->tgd_tot_granted += grant;
ted->ted_grant += grant;
void tgt_grant_discard(struct obd_export *exp)
{
struct obd_device *obd = exp->exp_obd;
- struct tg_grants_data *tgd = &obd->u.obt.obt_lut->lut_tgd;
+ struct lu_target *lut = class_exp2tgt(exp);
struct tg_export_data *ted = &exp->exp_target_data;
+ struct tg_grants_data *tgd;
+
+ if (!lut)
+ return;
+ tgd = &lut->lut_tgd;
spin_lock(&tgd->tgd_grant_lock);
LASSERTF(tgd->tgd_tot_granted >= ted->ted_grant,
"%s: tot_granted %llu cli %s/%p ted_grant %ld\n",
RETURN(rc);
}
EXPORT_SYMBOL(tgt_grant_commit_cb_add);
+
+/**
+ * Show estimate of total amount of dirty data on clients.
+ *
+ * \param[in] m seq_file handle
+ * \param[in] data unused for single entry
+ *
+ * \retval 0 on success
+ * \retval negative value on error
+ */
+int tgt_tot_dirty_seq_show(struct seq_file *m, void *data)
+{
+ struct obd_device *obd = m->private;
+ struct tg_grants_data *tgd;
+
+ LASSERT(obd != NULL);
+ tgd = &obd->u.obt.obt_lut->lut_tgd;
+ seq_printf(m, "%llu\n", tgd->tgd_tot_dirty);
+ return 0;
+}
+EXPORT_SYMBOL(tgt_tot_dirty_seq_show);
+
+/**
+ * Show total amount of space granted to clients.
+ *
+ * \param[in] m seq_file handle
+ * \param[in] data unused for single entry
+ *
+ * \retval 0 on success
+ * \retval negative value on error
+ */
+int tgt_tot_granted_seq_show(struct seq_file *m, void *data)
+{
+ struct obd_device *obd = m->private;
+ struct tg_grants_data *tgd;
+
+ LASSERT(obd != NULL);
+ tgd = &obd->u.obt.obt_lut->lut_tgd;
+ seq_printf(m, "%llu\n", tgd->tgd_tot_granted);
+ return 0;
+}
+EXPORT_SYMBOL(tgt_tot_granted_seq_show);
+
+/**
+ * Show total amount of space used by IO in progress.
+ *
+ * \param[in] m seq_file handle
+ * \param[in] data unused for single entry
+ *
+ * \retval 0 on success
+ * \retval negative value on error
+ */
+int tgt_tot_pending_seq_show(struct seq_file *m, void *data)
+{
+ struct obd_device *obd = m->private;
+ struct tg_grants_data *tgd;
+
+ LASSERT(obd != NULL);
+ tgd = &obd->u.obt.obt_lut->lut_tgd;
+ seq_printf(m, "%llu\n", tgd->tgd_tot_pending);
+ return 0;
+}
+EXPORT_SYMBOL(tgt_tot_pending_seq_show);
+
+/**
+ * Show if grants compatibility mode is disabled.
+ *
+ * When tgd_grant_compat_disable is set, we don't grant any space to clients
+ * not supporting OBD_CONNECT_GRANT_PARAM. Otherwise, space granted to such
+ * a client is inflated since it consumes PAGE_SIZE of grant space per
+ * block, (i.e. typically 4kB units), but underlaying file system might have
+ * block size bigger than page size, e.g. ZFS. See LU-2049 for details.
+ *
+ * \param[in] m seq_file handle
+ * \param[in] data unused for single entry
+ *
+ * \retval 0 on success
+ * \retval negative value on error
+ */
+int tgt_grant_compat_disable_seq_show(struct seq_file *m, void *data)
+{
+ struct obd_device *obd = m->private;
+ struct tg_grants_data *tgd = &obd->u.obt.obt_lut->lut_tgd;
+
+ seq_printf(m, "%u\n", tgd->tgd_grant_compat_disable);
+ return 0;
+}
+EXPORT_SYMBOL(tgt_grant_compat_disable_seq_show);
+
+/**
+ * Change grant compatibility mode.
+ *
+ * Setting tgd_grant_compat_disable prohibit any space granting to clients
+ * not supporting OBD_CONNECT_GRANT_PARAM. See details above.
+ *
+ * \param[in] file proc file
+ * \param[in] buffer string which represents mode
+ * 1: disable compatibility mode
+ * 0: enable compatibility mode
+ * \param[in] count \a buffer length
+ * \param[in] off unused for single entry
+ *
+ * \retval \a count on success
+ * \retval negative number on error
+ */
+ssize_t tgt_grant_compat_disable_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
+{
+ struct seq_file *m = file->private_data;
+ struct obd_device *obd = m->private;
+ struct tg_grants_data *tgd = &obd->u.obt.obt_lut->lut_tgd;
+ bool val;
+ int rc;
+
+ rc = kstrtobool_from_user(buffer, count, &val);
+ if (rc)
+ return rc;
+
+ tgd->tgd_grant_compat_disable = val;
+
+ return count;
+}
+EXPORT_SYMBOL(tgt_grant_compat_disable_seq_write);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff