Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | drbd_proc.c |
| 3 | |
| 4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. |
| 5 | |
| 6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. |
| 7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. |
| 8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. |
| 9 | |
| 10 | drbd is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 2, or (at your option) |
| 13 | any later version. |
| 14 | |
| 15 | drbd is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with drbd; see the file COPYING. If not, write to |
| 22 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 23 | |
| 24 | */ |
| 25 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 26 | #include <linux/module.h> |
| 27 | |
| 28 | #include <asm/uaccess.h> |
| 29 | #include <linux/fs.h> |
| 30 | #include <linux/file.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 31 | #include <linux/proc_fs.h> |
| 32 | #include <linux/seq_file.h> |
| 33 | #include <linux/drbd.h> |
| 34 | #include "drbd_int.h" |
| 35 | |
| 36 | static int drbd_proc_open(struct inode *inode, struct file *file); |
| 37 | |
| 38 | |
| 39 | struct proc_dir_entry *drbd_proc; |
Emese Revfy | 7d4e9d0 | 2009-12-14 00:59:30 +0100 | [diff] [blame] | 40 | const struct file_operations drbd_proc_fops = { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 41 | .owner = THIS_MODULE, |
| 42 | .open = drbd_proc_open, |
| 43 | .read = seq_read, |
| 44 | .llseek = seq_lseek, |
| 45 | .release = single_release, |
| 46 | }; |
| 47 | |
Lars Ellenberg | 439d595 | 2010-11-05 09:52:46 +0100 | [diff] [blame^] | 48 | void seq_printf_with_thousands_grouping(struct seq_file *seq, long v) |
| 49 | { |
| 50 | /* v is in kB/sec. We don't expect TiByte/sec yet. */ |
| 51 | if (unlikely(v >= 1000000)) { |
| 52 | /* cool: > GiByte/s */ |
| 53 | seq_printf(seq, "%ld,", v / 1000000); |
| 54 | v /= 1000000; |
| 55 | seq_printf(seq, "%03ld,%03ld", v/1000, v % 1000); |
| 56 | } else if (likely(v >= 1000)) |
| 57 | seq_printf(seq, "%ld,%03ld", v/1000, v % 1000); |
| 58 | else |
| 59 | seq_printf(seq, "%ld", v); |
| 60 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 61 | |
| 62 | /*lge |
| 63 | * progress bars shamelessly adapted from driver/md/md.c |
| 64 | * output looks like |
| 65 | * [=====>..............] 33.5% (23456/123456) |
| 66 | * finish: 2:20:20 speed: 6,345 (6,456) K/sec |
| 67 | */ |
| 68 | static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq) |
| 69 | { |
| 70 | unsigned long db, dt, dbdt, rt, rs_left; |
| 71 | unsigned int res; |
| 72 | int i, x, y; |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 73 | int stalled = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 74 | |
| 75 | drbd_get_syncer_progress(mdev, &rs_left, &res); |
| 76 | |
| 77 | x = res/50; |
| 78 | y = 20-x; |
| 79 | seq_printf(seq, "\t["); |
| 80 | for (i = 1; i < x; i++) |
| 81 | seq_printf(seq, "="); |
| 82 | seq_printf(seq, ">"); |
| 83 | for (i = 0; i < y; i++) |
| 84 | seq_printf(seq, "."); |
| 85 | seq_printf(seq, "] "); |
| 86 | |
| 87 | seq_printf(seq, "sync'ed:%3u.%u%% ", res / 10, res % 10); |
| 88 | /* if more than 1 GB display in MB */ |
| 89 | if (mdev->rs_total > 0x100000L) |
Lars Ellenberg | e7f52df | 2010-08-03 20:20:20 +0200 | [diff] [blame] | 90 | seq_printf(seq, "(%lu/%lu)M\n\t", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 91 | (unsigned long) Bit2KB(rs_left >> 10), |
| 92 | (unsigned long) Bit2KB(mdev->rs_total >> 10)); |
| 93 | else |
Lars Ellenberg | e7f52df | 2010-08-03 20:20:20 +0200 | [diff] [blame] | 94 | seq_printf(seq, "(%lu/%lu)K\n\t", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 95 | (unsigned long) Bit2KB(rs_left), |
| 96 | (unsigned long) Bit2KB(mdev->rs_total)); |
| 97 | |
| 98 | /* see drivers/md/md.c |
| 99 | * We do not want to overflow, so the order of operands and |
| 100 | * the * 100 / 100 trick are important. We do a +1 to be |
| 101 | * safe against division by zero. We only estimate anyway. |
| 102 | * |
| 103 | * dt: time from mark until now |
| 104 | * db: blocks written from mark until now |
| 105 | * rt: remaining time |
| 106 | */ |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 107 | /* Rolling marks. last_mark+1 may just now be modified. last_mark+2 is |
| 108 | * at least (DRBD_SYNC_MARKS-2)*DRBD_SYNC_MARK_STEP old, and has at |
| 109 | * least DRBD_SYNC_MARK_STEP time before it will be modified. */ |
Lars Ellenberg | 439d595 | 2010-11-05 09:52:46 +0100 | [diff] [blame^] | 110 | /* ------------------------ ~18s average ------------------------ */ |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 111 | i = (mdev->rs_last_mark + 2) % DRBD_SYNC_MARKS; |
| 112 | dt = (jiffies - mdev->rs_mark_time[i]) / HZ; |
| 113 | if (dt > (DRBD_SYNC_MARK_STEP * DRBD_SYNC_MARKS)) |
| 114 | stalled = 1; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 115 | |
| 116 | if (!dt) |
| 117 | dt++; |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 118 | db = mdev->rs_mark_left[i] - rs_left; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 119 | rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */ |
| 120 | |
| 121 | seq_printf(seq, "finish: %lu:%02lu:%02lu", |
| 122 | rt / 3600, (rt % 3600) / 60, rt % 60); |
| 123 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 124 | dbdt = Bit2KB(db/dt); |
Lars Ellenberg | 439d595 | 2010-11-05 09:52:46 +0100 | [diff] [blame^] | 125 | seq_printf(seq, " speed: "); |
| 126 | seq_printf_with_thousands_grouping(seq, dbdt); |
| 127 | seq_printf(seq, " ("); |
| 128 | /* ------------------------- ~3s average ------------------------ */ |
| 129 | if (proc_details >= 1) { |
| 130 | /* this is what drbd_rs_should_slow_down() uses */ |
| 131 | i = (mdev->rs_last_mark + DRBD_SYNC_MARKS-1) % DRBD_SYNC_MARKS; |
| 132 | dt = (jiffies - mdev->rs_mark_time[i]) / HZ; |
| 133 | if (dt > (DRBD_SYNC_MARK_STEP * DRBD_SYNC_MARKS)) |
| 134 | stalled = 1; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 135 | |
Lars Ellenberg | 439d595 | 2010-11-05 09:52:46 +0100 | [diff] [blame^] | 136 | if (!dt) |
| 137 | dt++; |
| 138 | db = mdev->rs_mark_left[i] - rs_left; |
| 139 | rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */ |
| 140 | |
| 141 | dbdt = Bit2KB(db/dt); |
| 142 | seq_printf_with_thousands_grouping(seq, dbdt); |
| 143 | seq_printf(seq, " -- "); |
| 144 | } |
| 145 | |
| 146 | /* --------------------- long term average ---------------------- */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 147 | /* mean speed since syncer started |
| 148 | * we do account for PausedSync periods */ |
| 149 | dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ; |
Dan Carpenter | 2265769 | 2010-08-12 00:38:45 +0200 | [diff] [blame] | 150 | if (dt == 0) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 151 | dt = 1; |
| 152 | db = mdev->rs_total - rs_left; |
| 153 | dbdt = Bit2KB(db/dt); |
Lars Ellenberg | 439d595 | 2010-11-05 09:52:46 +0100 | [diff] [blame^] | 154 | seq_printf_with_thousands_grouping(seq, dbdt); |
| 155 | seq_printf(seq, ")"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 156 | |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 157 | if (mdev->state.conn == C_SYNC_TARGET) { |
| 158 | if (mdev->c_sync_rate > 1000) |
| 159 | seq_printf(seq, " want: %d,%03d", |
| 160 | mdev->c_sync_rate / 1000, mdev->c_sync_rate % 1000); |
| 161 | else |
| 162 | seq_printf(seq, " want: %d", mdev->c_sync_rate); |
| 163 | } |
| 164 | seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : ""); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | static void resync_dump_detail(struct seq_file *seq, struct lc_element *e) |
| 168 | { |
| 169 | struct bm_extent *bme = lc_entry(e, struct bm_extent, lce); |
| 170 | |
| 171 | seq_printf(seq, "%5d %s %s\n", bme->rs_left, |
| 172 | bme->flags & BME_NO_WRITES ? "NO_WRITES" : "---------", |
| 173 | bme->flags & BME_LOCKED ? "LOCKED" : "------" |
| 174 | ); |
| 175 | } |
| 176 | |
| 177 | static int drbd_seq_show(struct seq_file *seq, void *v) |
| 178 | { |
| 179 | int i, hole = 0; |
| 180 | const char *sn; |
| 181 | struct drbd_conf *mdev; |
| 182 | |
| 183 | static char write_ordering_chars[] = { |
| 184 | [WO_none] = 'n', |
| 185 | [WO_drain_io] = 'd', |
| 186 | [WO_bdev_flush] = 'f', |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 187 | }; |
| 188 | |
| 189 | seq_printf(seq, "version: " REL_VERSION " (api:%d/proto:%d-%d)\n%s\n", |
| 190 | API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX, drbd_buildtag()); |
| 191 | |
| 192 | /* |
| 193 | cs .. connection state |
| 194 | ro .. node role (local/remote) |
| 195 | ds .. disk state (local/remote) |
| 196 | protocol |
| 197 | various flags |
| 198 | ns .. network send |
| 199 | nr .. network receive |
| 200 | dw .. disk write |
| 201 | dr .. disk read |
| 202 | al .. activity log write count |
| 203 | bm .. bitmap update write count |
| 204 | pe .. pending (waiting for ack or data reply) |
| 205 | ua .. unack'd (still need to send ack or data reply) |
| 206 | ap .. application requests accepted, but not yet completed |
| 207 | ep .. number of epochs currently "on the fly", P_BARRIER_ACK pending |
| 208 | wo .. write ordering mode currently in use |
| 209 | oos .. known out-of-sync kB |
| 210 | */ |
| 211 | |
| 212 | for (i = 0; i < minor_count; i++) { |
| 213 | mdev = minor_to_mdev(i); |
| 214 | if (!mdev) { |
| 215 | hole = 1; |
| 216 | continue; |
| 217 | } |
| 218 | if (hole) { |
| 219 | hole = 0; |
| 220 | seq_printf(seq, "\n"); |
| 221 | } |
| 222 | |
| 223 | sn = drbd_conn_str(mdev->state.conn); |
| 224 | |
| 225 | if (mdev->state.conn == C_STANDALONE && |
| 226 | mdev->state.disk == D_DISKLESS && |
| 227 | mdev->state.role == R_SECONDARY) { |
| 228 | seq_printf(seq, "%2d: cs:Unconfigured\n", i); |
| 229 | } else { |
| 230 | seq_printf(seq, |
Philipp Reisner | 0778286 | 2010-08-31 12:00:50 +0200 | [diff] [blame] | 231 | "%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c%c\n" |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 232 | " ns:%u nr:%u dw:%u dr:%u al:%u bm:%u " |
| 233 | "lo:%d pe:%d ua:%d ap:%d ep:%d wo:%c", |
| 234 | i, sn, |
| 235 | drbd_role_str(mdev->state.role), |
| 236 | drbd_role_str(mdev->state.peer), |
| 237 | drbd_disk_str(mdev->state.disk), |
| 238 | drbd_disk_str(mdev->state.pdsk), |
| 239 | (mdev->net_conf == NULL ? ' ' : |
| 240 | (mdev->net_conf->wire_protocol - DRBD_PROT_A+'A')), |
Philipp Reisner | fb22c40 | 2010-09-08 23:20:21 +0200 | [diff] [blame] | 241 | is_susp(mdev->state) ? 's' : 'r', |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 242 | mdev->state.aftr_isp ? 'a' : '-', |
| 243 | mdev->state.peer_isp ? 'p' : '-', |
| 244 | mdev->state.user_isp ? 'u' : '-', |
| 245 | mdev->congestion_reason ?: '-', |
Philipp Reisner | 0778286 | 2010-08-31 12:00:50 +0200 | [diff] [blame] | 246 | test_bit(AL_SUSPENDED, &mdev->flags) ? 's' : '-', |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 247 | mdev->send_cnt/2, |
| 248 | mdev->recv_cnt/2, |
| 249 | mdev->writ_cnt/2, |
| 250 | mdev->read_cnt/2, |
| 251 | mdev->al_writ_cnt, |
| 252 | mdev->bm_writ_cnt, |
| 253 | atomic_read(&mdev->local_cnt), |
| 254 | atomic_read(&mdev->ap_pending_cnt) + |
| 255 | atomic_read(&mdev->rs_pending_cnt), |
| 256 | atomic_read(&mdev->unacked_cnt), |
| 257 | atomic_read(&mdev->ap_bio_cnt), |
| 258 | mdev->epochs, |
| 259 | write_ordering_chars[mdev->write_ordering] |
| 260 | ); |
| 261 | seq_printf(seq, " oos:%lu\n", |
| 262 | Bit2KB(drbd_bm_total_weight(mdev))); |
| 263 | } |
| 264 | if (mdev->state.conn == C_SYNC_SOURCE || |
Lars Ellenberg | 439d595 | 2010-11-05 09:52:46 +0100 | [diff] [blame^] | 265 | mdev->state.conn == C_SYNC_TARGET || |
| 266 | mdev->state.conn == C_VERIFY_S || |
| 267 | mdev->state.conn == C_VERIFY_T) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 268 | drbd_syncer_progress(mdev, seq); |
| 269 | |
Lars Ellenberg | 30b743a | 2010-11-05 09:39:06 +0100 | [diff] [blame] | 270 | if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T) { |
| 271 | unsigned long bm_bits = drbd_bm_bits(mdev); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 272 | seq_printf(seq, "\t%3d%% %lu/%lu\n", |
Lars Ellenberg | 30b743a | 2010-11-05 09:39:06 +0100 | [diff] [blame] | 273 | (int)((bm_bits-mdev->ov_left) / |
| 274 | (bm_bits/100+1)), |
| 275 | bm_bits - mdev->ov_left, bm_bits); |
| 276 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 277 | |
| 278 | if (proc_details >= 1 && get_ldev_if_state(mdev, D_FAILED)) { |
| 279 | lc_seq_printf_stats(seq, mdev->resync); |
| 280 | lc_seq_printf_stats(seq, mdev->act_log); |
| 281 | put_ldev(mdev); |
| 282 | } |
| 283 | |
| 284 | if (proc_details >= 2) { |
| 285 | if (mdev->resync) { |
| 286 | lc_seq_dump_details(seq, mdev->resync, "rs_left", |
| 287 | resync_dump_detail); |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | static int drbd_proc_open(struct inode *inode, struct file *file) |
| 296 | { |
| 297 | return single_open(file, drbd_seq_show, PDE(inode)->data); |
| 298 | } |
| 299 | |
| 300 | /* PROC FS stuff end */ |