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 26 #include <linux/module.h> 27 28 #include <asm/uaccess.h> 29 #include <linux/fs.h> 30 #include <linux/file.h> 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; 40 const struct file_operations drbd_proc_fops = { 41 .owner = THIS_MODULE, 42 .open = drbd_proc_open, 43 .read = seq_read, 44 .llseek = seq_lseek, 45 .release = single_release, 46 }; 47 48 49 /*lge 50 * progress bars shamelessly adapted from driver/md/md.c 51 * output looks like 52 * [=====>..............] 33.5% (23456/123456) 53 * finish: 2:20:20 speed: 6,345 (6,456) K/sec 54 */ 55 static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq) 56 { 57 unsigned long db, dt, dbdt, rt, rs_left; 58 unsigned int res; 59 int i, x, y; 60 int stalled = 0; 61 62 drbd_get_syncer_progress(mdev, &rs_left, &res); 63 64 x = res/50; 65 y = 20-x; 66 seq_printf(seq, "\t["); 67 for (i = 1; i < x; i++) 68 seq_printf(seq, "="); 69 seq_printf(seq, ">"); 70 for (i = 0; i < y; i++) 71 seq_printf(seq, "."); 72 seq_printf(seq, "] "); 73 74 seq_printf(seq, "sync'ed:%3u.%u%% ", res / 10, res % 10); 75 /* if more than 1 GB display in MB */ 76 if (mdev->rs_total > 0x100000L) 77 seq_printf(seq, "(%lu/%lu)M\n\t", 78 (unsigned long) Bit2KB(rs_left >> 10), 79 (unsigned long) Bit2KB(mdev->rs_total >> 10)); 80 else 81 seq_printf(seq, "(%lu/%lu)K\n\t", 82 (unsigned long) Bit2KB(rs_left), 83 (unsigned long) Bit2KB(mdev->rs_total)); 84 85 /* see drivers/md/md.c 86 * We do not want to overflow, so the order of operands and 87 * the * 100 / 100 trick are important. We do a +1 to be 88 * safe against division by zero. We only estimate anyway. 89 * 90 * dt: time from mark until now 91 * db: blocks written from mark until now 92 * rt: remaining time 93 */ 94 /* Rolling marks. last_mark+1 may just now be modified. last_mark+2 is 95 * at least (DRBD_SYNC_MARKS-2)*DRBD_SYNC_MARK_STEP old, and has at 96 * least DRBD_SYNC_MARK_STEP time before it will be modified. */ 97 i = (mdev->rs_last_mark + 2) % DRBD_SYNC_MARKS; 98 dt = (jiffies - mdev->rs_mark_time[i]) / HZ; 99 if (dt > (DRBD_SYNC_MARK_STEP * DRBD_SYNC_MARKS)) 100 stalled = 1; 101 102 if (!dt) 103 dt++; 104 db = mdev->rs_mark_left[i] - rs_left; 105 rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */ 106 107 seq_printf(seq, "finish: %lu:%02lu:%02lu", 108 rt / 3600, (rt % 3600) / 60, rt % 60); 109 110 /* current speed average over (SYNC_MARKS * SYNC_MARK_STEP) jiffies */ 111 dbdt = Bit2KB(db/dt); 112 if (dbdt > 1000) 113 seq_printf(seq, " speed: %ld,%03ld", 114 dbdt/1000, dbdt % 1000); 115 else 116 seq_printf(seq, " speed: %ld", dbdt); 117 118 /* mean speed since syncer started 119 * we do account for PausedSync periods */ 120 dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ; 121 if (dt == 0) 122 dt = 1; 123 db = mdev->rs_total - rs_left; 124 dbdt = Bit2KB(db/dt); 125 if (dbdt > 1000) 126 seq_printf(seq, " (%ld,%03ld)", 127 dbdt/1000, dbdt % 1000); 128 else 129 seq_printf(seq, " (%ld)", dbdt); 130 131 if (mdev->state.conn == C_SYNC_TARGET) { 132 if (mdev->c_sync_rate > 1000) 133 seq_printf(seq, " want: %d,%03d", 134 mdev->c_sync_rate / 1000, mdev->c_sync_rate % 1000); 135 else 136 seq_printf(seq, " want: %d", mdev->c_sync_rate); 137 } 138 seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : ""); 139 } 140 141 static void resync_dump_detail(struct seq_file *seq, struct lc_element *e) 142 { 143 struct bm_extent *bme = lc_entry(e, struct bm_extent, lce); 144 145 seq_printf(seq, "%5d %s %s\n", bme->rs_left, 146 bme->flags & BME_NO_WRITES ? "NO_WRITES" : "---------", 147 bme->flags & BME_LOCKED ? "LOCKED" : "------" 148 ); 149 } 150 151 static int drbd_seq_show(struct seq_file *seq, void *v) 152 { 153 int i, hole = 0; 154 const char *sn; 155 struct drbd_conf *mdev; 156 157 static char write_ordering_chars[] = { 158 [WO_none] = 'n', 159 [WO_drain_io] = 'd', 160 [WO_bdev_flush] = 'f', 161 [WO_bio_barrier] = 'b', 162 }; 163 164 seq_printf(seq, "version: " REL_VERSION " (api:%d/proto:%d-%d)\n%s\n", 165 API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX, drbd_buildtag()); 166 167 /* 168 cs .. connection state 169 ro .. node role (local/remote) 170 ds .. disk state (local/remote) 171 protocol 172 various flags 173 ns .. network send 174 nr .. network receive 175 dw .. disk write 176 dr .. disk read 177 al .. activity log write count 178 bm .. bitmap update write count 179 pe .. pending (waiting for ack or data reply) 180 ua .. unack'd (still need to send ack or data reply) 181 ap .. application requests accepted, but not yet completed 182 ep .. number of epochs currently "on the fly", P_BARRIER_ACK pending 183 wo .. write ordering mode currently in use 184 oos .. known out-of-sync kB 185 */ 186 187 for (i = 0; i < minor_count; i++) { 188 mdev = minor_to_mdev(i); 189 if (!mdev) { 190 hole = 1; 191 continue; 192 } 193 if (hole) { 194 hole = 0; 195 seq_printf(seq, "\n"); 196 } 197 198 sn = drbd_conn_str(mdev->state.conn); 199 200 if (mdev->state.conn == C_STANDALONE && 201 mdev->state.disk == D_DISKLESS && 202 mdev->state.role == R_SECONDARY) { 203 seq_printf(seq, "%2d: cs:Unconfigured\n", i); 204 } else { 205 seq_printf(seq, 206 "%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c%c\n" 207 " ns:%u nr:%u dw:%u dr:%u al:%u bm:%u " 208 "lo:%d pe:%d ua:%d ap:%d ep:%d wo:%c", 209 i, sn, 210 drbd_role_str(mdev->state.role), 211 drbd_role_str(mdev->state.peer), 212 drbd_disk_str(mdev->state.disk), 213 drbd_disk_str(mdev->state.pdsk), 214 (mdev->net_conf == NULL ? ' ' : 215 (mdev->net_conf->wire_protocol - DRBD_PROT_A+'A')), 216 is_susp(mdev->state) ? 's' : 'r', 217 mdev->state.aftr_isp ? 'a' : '-', 218 mdev->state.peer_isp ? 'p' : '-', 219 mdev->state.user_isp ? 'u' : '-', 220 mdev->congestion_reason ?: '-', 221 test_bit(AL_SUSPENDED, &mdev->flags) ? 's' : '-', 222 mdev->send_cnt/2, 223 mdev->recv_cnt/2, 224 mdev->writ_cnt/2, 225 mdev->read_cnt/2, 226 mdev->al_writ_cnt, 227 mdev->bm_writ_cnt, 228 atomic_read(&mdev->local_cnt), 229 atomic_read(&mdev->ap_pending_cnt) + 230 atomic_read(&mdev->rs_pending_cnt), 231 atomic_read(&mdev->unacked_cnt), 232 atomic_read(&mdev->ap_bio_cnt), 233 mdev->epochs, 234 write_ordering_chars[mdev->write_ordering] 235 ); 236 seq_printf(seq, " oos:%lu\n", 237 Bit2KB(drbd_bm_total_weight(mdev))); 238 } 239 if (mdev->state.conn == C_SYNC_SOURCE || 240 mdev->state.conn == C_SYNC_TARGET) 241 drbd_syncer_progress(mdev, seq); 242 243 if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T) 244 seq_printf(seq, "\t%3d%% %lu/%lu\n", 245 (int)((mdev->rs_total-mdev->ov_left) / 246 (mdev->rs_total/100+1)), 247 mdev->rs_total - mdev->ov_left, 248 mdev->rs_total); 249 250 if (proc_details >= 1 && get_ldev_if_state(mdev, D_FAILED)) { 251 lc_seq_printf_stats(seq, mdev->resync); 252 lc_seq_printf_stats(seq, mdev->act_log); 253 put_ldev(mdev); 254 } 255 256 if (proc_details >= 2) { 257 if (mdev->resync) { 258 lc_seq_dump_details(seq, mdev->resync, "rs_left", 259 resync_dump_detail); 260 } 261 } 262 } 263 264 return 0; 265 } 266 267 static int drbd_proc_open(struct inode *inode, struct file *file) 268 { 269 return single_open(file, drbd_seq_show, PDE(inode)->data); 270 } 271 272 /* PROC FS stuff end */ 273