4 This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
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>.
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)
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.
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.
26 #include <linux/module.h>
28 #include <asm/uaccess.h>
30 #include <linux/file.h>
31 #include <linux/proc_fs.h>
32 #include <linux/seq_file.h>
33 #include <linux/drbd.h>
36 static int drbd_proc_open(struct inode *inode, struct file *file);
39 struct proc_dir_entry *drbd_proc;
40 const struct file_operations drbd_proc_fops = {
42 .open = drbd_proc_open,
45 .release = single_release,
48 void seq_printf_with_thousands_grouping(struct seq_file *seq, long v)
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);
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);
59 seq_printf(seq, "%ld", v);
63 * progress bars shamelessly adapted from driver/md/md.c
65 * [=====>..............] 33.5% (23456/123456)
66 * finish: 2:20:20 speed: 6,345 (6,456) K/sec
68 static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
70 unsigned long db, dt, dbdt, rt, rs_left;
75 drbd_get_syncer_progress(mdev, &rs_left, &res);
79 seq_printf(seq, "\t[");
80 for (i = 1; i < x; i++)
83 for (i = 0; i < y; i++)
85 seq_printf(seq, "] ");
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)
90 seq_printf(seq, "(%lu/%lu)M\n\t",
91 (unsigned long) Bit2KB(rs_left >> 10),
92 (unsigned long) Bit2KB(mdev->rs_total >> 10));
94 seq_printf(seq, "(%lu/%lu)K\n\t",
95 (unsigned long) Bit2KB(rs_left),
96 (unsigned long) Bit2KB(mdev->rs_total));
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.
103 * dt: time from mark until now
104 * db: blocks written from mark until now
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. */
110 /* ------------------------ ~18s average ------------------------ */
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))
118 db = mdev->rs_mark_left[i] - rs_left;
119 rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */
121 seq_printf(seq, "finish: %lu:%02lu:%02lu",
122 rt / 3600, (rt % 3600) / 60, rt % 60);
124 dbdt = Bit2KB(db/dt);
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))
138 db = mdev->rs_mark_left[i] - rs_left;
139 rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */
141 dbdt = Bit2KB(db/dt);
142 seq_printf_with_thousands_grouping(seq, dbdt);
143 seq_printf(seq, " -- ");
146 /* --------------------- long term average ---------------------- */
147 /* mean speed since syncer started
148 * we do account for PausedSync periods */
149 dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ;
152 db = mdev->rs_total - rs_left;
153 dbdt = Bit2KB(db/dt);
154 seq_printf_with_thousands_grouping(seq, dbdt);
155 seq_printf(seq, ")");
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);
162 seq_printf(seq, " want: %d", mdev->c_sync_rate);
164 seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : "");
167 static void resync_dump_detail(struct seq_file *seq, struct lc_element *e)
169 struct bm_extent *bme = lc_entry(e, struct bm_extent, lce);
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" : "------"
177 static int drbd_seq_show(struct seq_file *seq, void *v)
181 struct drbd_conf *mdev;
183 static char write_ordering_chars[] = {
186 [WO_bdev_flush] = 'f',
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());
193 cs .. connection state
194 ro .. node role (local/remote)
195 ds .. disk state (local/remote)
199 nr .. network receive
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
212 for (i = 0; i < minor_count; i++) {
213 mdev = minor_to_mdev(i);
220 seq_printf(seq, "\n");
223 sn = drbd_conn_str(mdev->state.conn);
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);
231 "%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c%c\n"
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",
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')),
241 is_susp(mdev->state) ? 's' : 'r',
242 mdev->state.aftr_isp ? 'a' : '-',
243 mdev->state.peer_isp ? 'p' : '-',
244 mdev->state.user_isp ? 'u' : '-',
245 mdev->congestion_reason ?: '-',
246 test_bit(AL_SUSPENDED, &mdev->flags) ? 's' : '-',
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),
259 write_ordering_chars[mdev->write_ordering]
261 seq_printf(seq, " oos:%lu\n",
262 Bit2KB(drbd_bm_total_weight(mdev)));
264 if (mdev->state.conn == C_SYNC_SOURCE ||
265 mdev->state.conn == C_SYNC_TARGET ||
266 mdev->state.conn == C_VERIFY_S ||
267 mdev->state.conn == C_VERIFY_T)
268 drbd_syncer_progress(mdev, seq);
270 if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T) {
271 unsigned long bm_bits = drbd_bm_bits(mdev);
272 seq_printf(seq, "\t%3d%% %lu/%lu\n",
273 (int)((bm_bits-mdev->ov_left) /
275 bm_bits - mdev->ov_left, bm_bits);
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);
284 if (proc_details >= 2) {
286 lc_seq_dump_details(seq, mdev->resync, "rs_left",
295 static int drbd_proc_open(struct inode *inode, struct file *file)
297 return single_open(file, drbd_seq_show, PDE(inode)->data);
300 /* PROC FS stuff end */