--- zzzz-none-000/linux-3.10.107/drivers/block/drbd/drbd_proc.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/block/drbd/drbd_proc.c 2021-02-04 17:41:59.000000000 +0000 @@ -46,7 +46,7 @@ .release = drbd_proc_release, }; -void seq_printf_with_thousands_grouping(struct seq_file *seq, long v) +static void seq_printf_with_thousands_grouping(struct seq_file *seq, long v) { /* v is in kB/sec. We don't expect TiByte/sec yet. */ if (unlikely(v >= 1000000)) { @@ -60,20 +60,65 @@ seq_printf(seq, "%ld", v); } +static void drbd_get_syncer_progress(struct drbd_device *device, + union drbd_dev_state state, unsigned long *rs_total, + unsigned long *bits_left, unsigned int *per_mil_done) +{ + /* this is to break it at compile time when we change that, in case we + * want to support more than (1<<32) bits on a 32bit arch. */ + typecheck(unsigned long, device->rs_total); + *rs_total = device->rs_total; + + /* note: both rs_total and rs_left are in bits, i.e. in + * units of BM_BLOCK_SIZE. + * for the percentage, we don't care. */ + + if (state.conn == C_VERIFY_S || state.conn == C_VERIFY_T) + *bits_left = device->ov_left; + else + *bits_left = drbd_bm_total_weight(device) - device->rs_failed; + /* >> 10 to prevent overflow, + * +1 to prevent division by zero */ + if (*bits_left > *rs_total) { + /* D'oh. Maybe a logic bug somewhere. More likely just a race + * between state change and reset of rs_total. + */ + *bits_left = *rs_total; + *per_mil_done = *rs_total ? 0 : 1000; + } else { + /* Make sure the division happens in long context. + * We allow up to one petabyte storage right now, + * at a granularity of 4k per bit that is 2**38 bits. + * After shift right and multiplication by 1000, + * this should still fit easily into a 32bit long, + * so we don't need a 64bit division on 32bit arch. + * Note: currently we don't support such large bitmaps on 32bit + * arch anyways, but no harm done to be prepared for it here. + */ + unsigned int shift = *rs_total > UINT_MAX ? 16 : 10; + unsigned long left = *bits_left >> shift; + unsigned long total = 1UL + (*rs_total >> shift); + unsigned long tmp = 1000UL - left * 1000UL/total; + *per_mil_done = tmp; + } +} + + /*lge * progress bars shamelessly adapted from driver/md/md.c * output looks like * [=====>..............] 33.5% (23456/123456) * finish: 2:20:20 speed: 6,345 (6,456) K/sec */ -static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq) +static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *seq, + union drbd_dev_state state) { - unsigned long db, dt, dbdt, rt, rs_left; + unsigned long db, dt, dbdt, rt, rs_total, rs_left; unsigned int res; int i, x, y; int stalled = 0; - drbd_get_syncer_progress(mdev, &rs_left, &res); + drbd_get_syncer_progress(device, state, &rs_total, &rs_left, &res); x = res/50; y = 20-x; @@ -85,21 +130,23 @@ seq_printf(seq, "."); seq_printf(seq, "] "); - if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T) + if (state.conn == C_VERIFY_S || state.conn == C_VERIFY_T) seq_printf(seq, "verified:"); else seq_printf(seq, "sync'ed:"); seq_printf(seq, "%3u.%u%% ", res / 10, res % 10); /* if more than a few GB, display in MB */ - if (mdev->rs_total > (4UL << (30 - BM_BLOCK_SHIFT))) + if (rs_total > (4UL << (30 - BM_BLOCK_SHIFT))) seq_printf(seq, "(%lu/%lu)M", (unsigned long) Bit2KB(rs_left >> 10), - (unsigned long) Bit2KB(mdev->rs_total >> 10)); + (unsigned long) Bit2KB(rs_total >> 10)); else - seq_printf(seq, "(%lu/%lu)K\n\t", + seq_printf(seq, "(%lu/%lu)K", (unsigned long) Bit2KB(rs_left), - (unsigned long) Bit2KB(mdev->rs_total)); + (unsigned long) Bit2KB(rs_total)); + + seq_printf(seq, "\n\t"); /* see drivers/md/md.c * We do not want to overflow, so the order of operands and @@ -114,14 +161,14 @@ * at least (DRBD_SYNC_MARKS-2)*DRBD_SYNC_MARK_STEP old, and has at * least DRBD_SYNC_MARK_STEP time before it will be modified. */ /* ------------------------ ~18s average ------------------------ */ - i = (mdev->rs_last_mark + 2) % DRBD_SYNC_MARKS; - dt = (jiffies - mdev->rs_mark_time[i]) / HZ; - if (dt > (DRBD_SYNC_MARK_STEP * DRBD_SYNC_MARKS)) + i = (device->rs_last_mark + 2) % DRBD_SYNC_MARKS; + dt = (jiffies - device->rs_mark_time[i]) / HZ; + if (dt > 180) stalled = 1; if (!dt) dt++; - db = mdev->rs_mark_left[i] - rs_left; + db = device->rs_mark_left[i] - rs_left; rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */ seq_printf(seq, "finish: %lu:%02lu:%02lu", @@ -134,11 +181,11 @@ /* ------------------------- ~3s average ------------------------ */ if (proc_details >= 1) { /* this is what drbd_rs_should_slow_down() uses */ - i = (mdev->rs_last_mark + DRBD_SYNC_MARKS-1) % DRBD_SYNC_MARKS; - dt = (jiffies - mdev->rs_mark_time[i]) / HZ; + i = (device->rs_last_mark + DRBD_SYNC_MARKS-1) % DRBD_SYNC_MARKS; + dt = (jiffies - device->rs_mark_time[i]) / HZ; if (!dt) dt++; - db = mdev->rs_mark_left[i] - rs_left; + db = device->rs_mark_left[i] - rs_left; dbdt = Bit2KB(db/dt); seq_printf_with_thousands_grouping(seq, dbdt); seq_printf(seq, " -- "); @@ -147,34 +194,34 @@ /* --------------------- long term average ---------------------- */ /* mean speed since syncer started * we do account for PausedSync periods */ - dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ; + dt = (jiffies - device->rs_start - device->rs_paused) / HZ; if (dt == 0) dt = 1; - db = mdev->rs_total - rs_left; + db = rs_total - rs_left; dbdt = Bit2KB(db/dt); seq_printf_with_thousands_grouping(seq, dbdt); seq_printf(seq, ")"); - if (mdev->state.conn == C_SYNC_TARGET || - mdev->state.conn == C_VERIFY_S) { + if (state.conn == C_SYNC_TARGET || + state.conn == C_VERIFY_S) { seq_printf(seq, " want: "); - seq_printf_with_thousands_grouping(seq, mdev->c_sync_rate); + seq_printf_with_thousands_grouping(seq, device->c_sync_rate); } seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : ""); if (proc_details >= 1) { /* 64 bit: * we convert to sectors in the display below. */ - unsigned long bm_bits = drbd_bm_bits(mdev); + unsigned long bm_bits = drbd_bm_bits(device); unsigned long bit_pos; unsigned long long stop_sector = 0; - if (mdev->state.conn == C_VERIFY_S || - mdev->state.conn == C_VERIFY_T) { - bit_pos = bm_bits - mdev->ov_left; - if (verify_can_do_stop_sector(mdev)) - stop_sector = mdev->ov_stop_sector; + if (state.conn == C_VERIFY_S || + state.conn == C_VERIFY_T) { + bit_pos = bm_bits - device->ov_left; + if (verify_can_do_stop_sector(device)) + stop_sector = device->ov_stop_sector; } else - bit_pos = mdev->bm_resync_fo; + bit_pos = device->bm_resync_fo; /* Total sectors may be slightly off for oddly * sized devices. So what. */ seq_printf(seq, @@ -188,22 +235,13 @@ } } -static void resync_dump_detail(struct seq_file *seq, struct lc_element *e) -{ - struct bm_extent *bme = lc_entry(e, struct bm_extent, lce); - - seq_printf(seq, "%5d %s %s\n", bme->rs_left, - bme->flags & BME_NO_WRITES ? "NO_WRITES" : "---------", - bme->flags & BME_LOCKED ? "LOCKED" : "------" - ); -} - static int drbd_seq_show(struct seq_file *seq, void *v) { int i, prev_i = -1; const char *sn; - struct drbd_conf *mdev; + struct drbd_device *device; struct net_conf *nc; + union drbd_dev_state state; char wp; static char write_ordering_chars[] = { @@ -236,75 +274,72 @@ */ rcu_read_lock(); - idr_for_each_entry(&minors, mdev, i) { + idr_for_each_entry(&drbd_devices, device, i) { if (prev_i != i - 1) seq_printf(seq, "\n"); prev_i = i; - sn = drbd_conn_str(mdev->state.conn); + state = device->state; + sn = drbd_conn_str(state.conn); - if (mdev->state.conn == C_STANDALONE && - mdev->state.disk == D_DISKLESS && - mdev->state.role == R_SECONDARY) { + if (state.conn == C_STANDALONE && + state.disk == D_DISKLESS && + state.role == R_SECONDARY) { seq_printf(seq, "%2d: cs:Unconfigured\n", i); } else { - /* reset mdev->congestion_reason */ - bdi_rw_congested(&mdev->rq_queue->backing_dev_info); + /* reset device->congestion_reason */ + bdi_rw_congested(&device->rq_queue->backing_dev_info); - nc = rcu_dereference(mdev->tconn->net_conf); + nc = rcu_dereference(first_peer_device(device)->connection->net_conf); wp = nc ? nc->wire_protocol - DRBD_PROT_A + 'A' : ' '; seq_printf(seq, "%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c%c\n" " ns:%u nr:%u dw:%u dr:%u al:%u bm:%u " "lo:%d pe:%d ua:%d ap:%d ep:%d wo:%c", i, sn, - drbd_role_str(mdev->state.role), - drbd_role_str(mdev->state.peer), - drbd_disk_str(mdev->state.disk), - drbd_disk_str(mdev->state.pdsk), + drbd_role_str(state.role), + drbd_role_str(state.peer), + drbd_disk_str(state.disk), + drbd_disk_str(state.pdsk), wp, - drbd_suspended(mdev) ? 's' : 'r', - mdev->state.aftr_isp ? 'a' : '-', - mdev->state.peer_isp ? 'p' : '-', - mdev->state.user_isp ? 'u' : '-', - mdev->congestion_reason ?: '-', - test_bit(AL_SUSPENDED, &mdev->flags) ? 's' : '-', - mdev->send_cnt/2, - mdev->recv_cnt/2, - mdev->writ_cnt/2, - mdev->read_cnt/2, - mdev->al_writ_cnt, - mdev->bm_writ_cnt, - atomic_read(&mdev->local_cnt), - atomic_read(&mdev->ap_pending_cnt) + - atomic_read(&mdev->rs_pending_cnt), - atomic_read(&mdev->unacked_cnt), - atomic_read(&mdev->ap_bio_cnt), - mdev->tconn->epochs, - write_ordering_chars[mdev->tconn->write_ordering] + drbd_suspended(device) ? 's' : 'r', + state.aftr_isp ? 'a' : '-', + state.peer_isp ? 'p' : '-', + state.user_isp ? 'u' : '-', + device->congestion_reason ?: '-', + test_bit(AL_SUSPENDED, &device->flags) ? 's' : '-', + device->send_cnt/2, + device->recv_cnt/2, + device->writ_cnt/2, + device->read_cnt/2, + device->al_writ_cnt, + device->bm_writ_cnt, + atomic_read(&device->local_cnt), + atomic_read(&device->ap_pending_cnt) + + atomic_read(&device->rs_pending_cnt), + atomic_read(&device->unacked_cnt), + atomic_read(&device->ap_bio_cnt), + first_peer_device(device)->connection->epochs, + write_ordering_chars[device->resource->write_ordering] ); seq_printf(seq, " oos:%llu\n", Bit2KB((unsigned long long) - drbd_bm_total_weight(mdev))); + drbd_bm_total_weight(device))); } - if (mdev->state.conn == C_SYNC_SOURCE || - mdev->state.conn == C_SYNC_TARGET || - mdev->state.conn == C_VERIFY_S || - mdev->state.conn == C_VERIFY_T) - drbd_syncer_progress(mdev, seq); - - if (proc_details >= 1 && get_ldev_if_state(mdev, D_FAILED)) { - lc_seq_printf_stats(seq, mdev->resync); - lc_seq_printf_stats(seq, mdev->act_log); - put_ldev(mdev); + if (state.conn == C_SYNC_SOURCE || + state.conn == C_SYNC_TARGET || + state.conn == C_VERIFY_S || + state.conn == C_VERIFY_T) + drbd_syncer_progress(device, seq, state); + + if (proc_details >= 1 && get_ldev_if_state(device, D_FAILED)) { + lc_seq_printf_stats(seq, device->resync); + lc_seq_printf_stats(seq, device->act_log); + put_ldev(device); } - if (proc_details >= 2) { - if (mdev->resync) { - lc_seq_dump_details(seq, mdev->resync, "rs_left", - resync_dump_detail); - } - } + if (proc_details >= 2) + seq_printf(seq, "\tblocked on activity log: %d\n", atomic_read(&device->ap_actlog_cnt)); } rcu_read_unlock(); @@ -316,7 +351,7 @@ int err; if (try_module_get(THIS_MODULE)) { - err = single_open(file, drbd_seq_show, PDE_DATA(inode)); + err = single_open(file, drbd_seq_show, NULL); if (err) module_put(THIS_MODULE); return err;