A fix to avoid a corner case when scheduling cap reclaim in batches
from Xiubo, a patch to add some observability into cap waiters from Jeff and a couple of cleanups. -----BEGIN PGP SIGNATURE----- iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAl3yiJMTHGlkcnlvbW92 QGdtYWlsLmNvbQAKCRBKf944AhHzi5k9CACmM3fJGrTUuOLgXAxxllCfiV6UQLoY nuTo/bx0DmG603n+Ze8+Z0iz7hDc1Gw2XUeLkJcAE/xSetgZXO/MvJ0Ionq5Ac/k CrqS6ucIa1bPxbE1QMTHswHjkajKwBpAZ5+khdLNLuXJxy3c9HDCGOT4VZav7Yc9 99W4kIdzOKdYLpZHAedMK97IJIrD5WhYTAFW4rNPY0GL6OPD1V0uiS9v7xUWIxnZ Uusnu+zY8miQlLVx/V9DyLh/6G5X7XyQO1nkSQcVXZOOG7+qnkq6jDhQW8adgOSZ wUFigTxxhSTIcntWg01TaCRNoi1N3/P8Z9/rD27zBHPbl93ANH+lUkCh =NicF -----END PGP SIGNATURE----- Merge tag 'ceph-for-5.5-rc2' of git://github.com/ceph/ceph-client Pull ceph fixes from Ilya Dryomov: "A fix to avoid a corner case when scheduling cap reclaim in batches from Xiubo, a patch to add some observability into cap waiters from Jeff and a couple of cleanups" * tag 'ceph-for-5.5-rc2' of git://github.com/ceph/ceph-client: ceph: add more debug info when decoding mdsmap ceph: switch to global cap helper ceph: trigger the reclaim work once there has enough pending caps ceph: show tasks waiting on caps in debugfs caps file ceph: convert int fields in ceph_mount_options to unsigned int
This commit is contained in:
Linus Torvalds
Коммит
37d4e84f76
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@ -1011,18 +1011,13 @@ static int __ceph_is_single_caps(struct ceph_inode_info *ci)
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return rb_first(&ci->i_caps) == rb_last(&ci->i_caps);
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}
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static int __ceph_is_any_caps(struct ceph_inode_info *ci)
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{
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return !RB_EMPTY_ROOT(&ci->i_caps);
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}
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int ceph_is_any_caps(struct inode *inode)
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{
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struct ceph_inode_info *ci = ceph_inode(inode);
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int ret;
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spin_lock(&ci->i_ceph_lock);
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ret = __ceph_is_any_caps(ci);
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ret = __ceph_is_any_real_caps(ci);
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spin_unlock(&ci->i_ceph_lock);
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return ret;
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@ -1099,15 +1094,16 @@ void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release)
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if (removed)
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ceph_put_cap(mdsc, cap);
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/* when reconnect denied, we remove session caps forcibly,
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* i_wr_ref can be non-zero. If there are ongoing write,
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* keep i_snap_realm.
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*/
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if (!__ceph_is_any_caps(ci) && ci->i_wr_ref == 0 && ci->i_snap_realm)
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drop_inode_snap_realm(ci);
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if (!__ceph_is_any_real_caps(ci)) {
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/* when reconnect denied, we remove session caps forcibly,
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* i_wr_ref can be non-zero. If there are ongoing write,
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* keep i_snap_realm.
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*/
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if (ci->i_wr_ref == 0 && ci->i_snap_realm)
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drop_inode_snap_realm(ci);
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if (!__ceph_is_any_real_caps(ci))
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__cap_delay_cancel(mdsc, ci);
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}
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}
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struct cap_msg_args {
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@ -2764,7 +2760,19 @@ int ceph_get_caps(struct file *filp, int need, int want,
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if (ret == -EAGAIN)
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continue;
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if (!ret) {
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struct ceph_mds_client *mdsc = fsc->mdsc;
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struct cap_wait cw;
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DEFINE_WAIT_FUNC(wait, woken_wake_function);
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cw.ino = inode->i_ino;
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cw.tgid = current->tgid;
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cw.need = need;
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cw.want = want;
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spin_lock(&mdsc->caps_list_lock);
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list_add(&cw.list, &mdsc->cap_wait_list);
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spin_unlock(&mdsc->caps_list_lock);
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add_wait_queue(&ci->i_cap_wq, &wait);
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flags |= NON_BLOCKING;
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@ -2778,6 +2786,11 @@ int ceph_get_caps(struct file *filp, int need, int want,
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}
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remove_wait_queue(&ci->i_cap_wq, &wait);
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spin_lock(&mdsc->caps_list_lock);
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list_del(&cw.list);
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spin_unlock(&mdsc->caps_list_lock);
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if (ret == -EAGAIN)
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continue;
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}
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@ -2928,7 +2941,7 @@ void ceph_put_cap_refs(struct ceph_inode_info *ci, int had)
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ci->i_head_snapc = NULL;
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}
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/* see comment in __ceph_remove_cap() */
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if (!__ceph_is_any_caps(ci) && ci->i_snap_realm)
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if (!__ceph_is_any_real_caps(ci) && ci->i_snap_realm)
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drop_inode_snap_realm(ci);
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}
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spin_unlock(&ci->i_ceph_lock);
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@ -139,6 +139,7 @@ static int caps_show(struct seq_file *s, void *p)
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struct ceph_fs_client *fsc = s->private;
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struct ceph_mds_client *mdsc = fsc->mdsc;
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int total, avail, used, reserved, min, i;
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struct cap_wait *cw;
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ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
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seq_printf(s, "total\t\t%d\n"
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@ -166,6 +167,18 @@ static int caps_show(struct seq_file *s, void *p)
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}
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mutex_unlock(&mdsc->mutex);
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seq_printf(s, "\n\nWaiters:\n--------\n");
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seq_printf(s, "tgid ino need want\n");
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seq_printf(s, "-----------------------------------------------------\n");
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spin_lock(&mdsc->caps_list_lock);
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list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
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seq_printf(s, "%-13d0x%-17lx%-17s%-17s\n", cw->tgid, cw->ino,
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ceph_cap_string(cw->need),
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ceph_cap_string(cw->want));
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}
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spin_unlock(&mdsc->caps_list_lock);
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return 0;
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}
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@ -2015,7 +2015,7 @@ void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr)
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if (!nr)
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return;
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val = atomic_add_return(nr, &mdsc->cap_reclaim_pending);
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if (!(val % CEPH_CAPS_PER_RELEASE)) {
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if ((val % CEPH_CAPS_PER_RELEASE) < nr) {
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atomic_set(&mdsc->cap_reclaim_pending, 0);
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ceph_queue_cap_reclaim_work(mdsc);
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}
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@ -2032,12 +2032,13 @@ int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
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struct ceph_mds_reply_info_parsed *rinfo = &req->r_reply_info;
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struct ceph_mount_options *opt = req->r_mdsc->fsc->mount_options;
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size_t size = sizeof(struct ceph_mds_reply_dir_entry);
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int order, num_entries;
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unsigned int num_entries;
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int order;
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spin_lock(&ci->i_ceph_lock);
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num_entries = ci->i_files + ci->i_subdirs;
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spin_unlock(&ci->i_ceph_lock);
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num_entries = max(num_entries, 1);
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num_entries = max(num_entries, 1U);
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num_entries = min(num_entries, opt->max_readdir);
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order = get_order(size * num_entries);
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@ -4168,6 +4169,7 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
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INIT_DELAYED_WORK(&mdsc->delayed_work, delayed_work);
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mdsc->last_renew_caps = jiffies;
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INIT_LIST_HEAD(&mdsc->cap_delay_list);
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INIT_LIST_HEAD(&mdsc->cap_wait_list);
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spin_lock_init(&mdsc->cap_delay_lock);
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INIT_LIST_HEAD(&mdsc->snap_flush_list);
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spin_lock_init(&mdsc->snap_flush_lock);
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@ -340,6 +340,14 @@ struct ceph_quotarealm_inode {
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struct inode *inode;
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};
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struct cap_wait {
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struct list_head list;
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unsigned long ino;
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pid_t tgid;
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int need;
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int want;
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};
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/*
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* mds client state
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*/
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@ -416,6 +424,7 @@ struct ceph_mds_client {
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spinlock_t caps_list_lock;
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struct list_head caps_list; /* unused (reserved or
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unreserved) */
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struct list_head cap_wait_list;
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int caps_total_count; /* total caps allocated */
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int caps_use_count; /* in use */
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int caps_use_max; /* max used caps */
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@ -158,6 +158,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
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void *pexport_targets = NULL;
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struct ceph_timespec laggy_since;
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struct ceph_mds_info *info;
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bool laggy;
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ceph_decode_need(p, end, sizeof(u64) + 1, bad);
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global_id = ceph_decode_64(p);
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@ -190,6 +191,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
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if (err)
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goto corrupt;
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ceph_decode_copy(p, &laggy_since, sizeof(laggy_since));
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laggy = laggy_since.tv_sec != 0 || laggy_since.tv_nsec != 0;
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*p += sizeof(u32);
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ceph_decode_32_safe(p, end, namelen, bad);
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*p += namelen;
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@ -207,10 +209,11 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
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*p = info_end;
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}
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dout("mdsmap_decode %d/%d %lld mds%d.%d %s %s\n",
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dout("mdsmap_decode %d/%d %lld mds%d.%d %s %s%s\n",
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i+1, n, global_id, mds, inc,
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ceph_pr_addr(&addr),
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ceph_mds_state_name(state));
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ceph_mds_state_name(state),
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laggy ? "(laggy)" : "");
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if (mds < 0 || state <= 0)
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continue;
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@ -230,8 +233,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
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info->global_id = global_id;
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info->state = state;
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info->addr = addr;
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info->laggy = (laggy_since.tv_sec != 0 ||
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laggy_since.tv_nsec != 0);
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info->laggy = laggy;
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info->num_export_targets = num_export_targets;
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if (num_export_targets) {
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info->export_targets = kcalloc(num_export_targets,
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@ -355,6 +357,8 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
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m->m_damaged = false;
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}
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bad_ext:
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dout("mdsmap_decode m_enabled: %d, m_damaged: %d, m_num_laggy: %d\n",
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!!m->m_enabled, !!m->m_damaged, m->m_num_laggy);
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*p = end;
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dout("mdsmap_decode success epoch %u\n", m->m_epoch);
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return m;
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@ -172,10 +172,10 @@ static const struct fs_parameter_enum ceph_mount_param_enums[] = {
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static const struct fs_parameter_spec ceph_mount_param_specs[] = {
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fsparam_flag_no ("acl", Opt_acl),
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fsparam_flag_no ("asyncreaddir", Opt_asyncreaddir),
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fsparam_u32 ("caps_max", Opt_caps_max),
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fsparam_s32 ("caps_max", Opt_caps_max),
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fsparam_u32 ("caps_wanted_delay_max", Opt_caps_wanted_delay_max),
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fsparam_u32 ("caps_wanted_delay_min", Opt_caps_wanted_delay_min),
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fsparam_s32 ("write_congestion_kb", Opt_congestion_kb),
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fsparam_u32 ("write_congestion_kb", Opt_congestion_kb),
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fsparam_flag_no ("copyfrom", Opt_copyfrom),
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fsparam_flag_no ("dcache", Opt_dcache),
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fsparam_flag_no ("dirstat", Opt_dirstat),
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@ -187,8 +187,8 @@ static const struct fs_parameter_spec ceph_mount_param_specs[] = {
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fsparam_flag_no ("quotadf", Opt_quotadf),
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fsparam_u32 ("rasize", Opt_rasize),
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fsparam_flag_no ("rbytes", Opt_rbytes),
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fsparam_s32 ("readdir_max_bytes", Opt_readdir_max_bytes),
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fsparam_s32 ("readdir_max_entries", Opt_readdir_max_entries),
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fsparam_u32 ("readdir_max_bytes", Opt_readdir_max_bytes),
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fsparam_u32 ("readdir_max_entries", Opt_readdir_max_entries),
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fsparam_enum ("recover_session", Opt_recover_session),
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fsparam_flag_no ("require_active_mds", Opt_require_active_mds),
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fsparam_u32 ("rsize", Opt_rsize),
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@ -328,7 +328,9 @@ static int ceph_parse_mount_param(struct fs_context *fc,
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fsopt->caps_wanted_delay_max = result.uint_32;
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break;
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case Opt_caps_max:
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fsopt->caps_max = result.uint_32;
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if (result.int_32 < 0)
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goto out_of_range;
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fsopt->caps_max = result.int_32;
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break;
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case Opt_readdir_max_entries:
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if (result.uint_32 < 1)
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@ -547,25 +549,25 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
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seq_show_option(m, "recover_session", "clean");
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if (fsopt->wsize != CEPH_MAX_WRITE_SIZE)
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seq_printf(m, ",wsize=%d", fsopt->wsize);
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seq_printf(m, ",wsize=%u", fsopt->wsize);
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if (fsopt->rsize != CEPH_MAX_READ_SIZE)
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seq_printf(m, ",rsize=%d", fsopt->rsize);
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seq_printf(m, ",rsize=%u", fsopt->rsize);
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if (fsopt->rasize != CEPH_RASIZE_DEFAULT)
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seq_printf(m, ",rasize=%d", fsopt->rasize);
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seq_printf(m, ",rasize=%u", fsopt->rasize);
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if (fsopt->congestion_kb != default_congestion_kb())
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seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
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seq_printf(m, ",write_congestion_kb=%u", fsopt->congestion_kb);
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if (fsopt->caps_max)
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seq_printf(m, ",caps_max=%d", fsopt->caps_max);
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if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
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seq_printf(m, ",caps_wanted_delay_min=%d",
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seq_printf(m, ",caps_wanted_delay_min=%u",
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fsopt->caps_wanted_delay_min);
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if (fsopt->caps_wanted_delay_max != CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT)
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seq_printf(m, ",caps_wanted_delay_max=%d",
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seq_printf(m, ",caps_wanted_delay_max=%u",
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fsopt->caps_wanted_delay_max);
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if (fsopt->max_readdir != CEPH_MAX_READDIR_DEFAULT)
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seq_printf(m, ",readdir_max_entries=%d", fsopt->max_readdir);
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seq_printf(m, ",readdir_max_entries=%u", fsopt->max_readdir);
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if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
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seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
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seq_printf(m, ",readdir_max_bytes=%u", fsopt->max_readdir_bytes);
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if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
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seq_show_option(m, "snapdirname", fsopt->snapdir_name);
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@ -73,16 +73,16 @@
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#define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */
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struct ceph_mount_options {
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int flags;
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unsigned int flags;
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int wsize; /* max write size */
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int rsize; /* max read size */
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int rasize; /* max readahead */
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int congestion_kb; /* max writeback in flight */
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int caps_wanted_delay_min, caps_wanted_delay_max;
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unsigned int wsize; /* max write size */
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unsigned int rsize; /* max read size */
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unsigned int rasize; /* max readahead */
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unsigned int congestion_kb; /* max writeback in flight */
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unsigned int caps_wanted_delay_min, caps_wanted_delay_max;
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int caps_max;
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int max_readdir; /* max readdir result (entires) */
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int max_readdir_bytes; /* max readdir result (bytes) */
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unsigned int max_readdir; /* max readdir result (entries) */
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unsigned int max_readdir_bytes; /* max readdir result (bytes) */
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/*
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* everything above this point can be memcmp'd; everything below
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