Commit | Line | Data |
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b411b363 PR |
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 | ||
b411b363 PR |
26 | #include <linux/module.h> |
27 | ||
28 | #include <asm/uaccess.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/file.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/proc_fs.h> | |
33 | #include <linux/seq_file.h> | |
34 | #include <linux/drbd.h> | |
35 | #include "drbd_int.h" | |
36 | ||
37 | static int drbd_proc_open(struct inode *inode, struct file *file); | |
38 | ||
39 | ||
40 | struct proc_dir_entry *drbd_proc; | |
41 | struct file_operations drbd_proc_fops = { | |
42 | .owner = THIS_MODULE, | |
43 | .open = drbd_proc_open, | |
44 | .read = seq_read, | |
45 | .llseek = seq_lseek, | |
46 | .release = single_release, | |
47 | }; | |
48 | ||
49 | ||
50 | /*lge | |
51 | * progress bars shamelessly adapted from driver/md/md.c | |
52 | * output looks like | |
53 | * [=====>..............] 33.5% (23456/123456) | |
54 | * finish: 2:20:20 speed: 6,345 (6,456) K/sec | |
55 | */ | |
56 | static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq) | |
57 | { | |
58 | unsigned long db, dt, dbdt, rt, rs_left; | |
59 | unsigned int res; | |
60 | int i, x, y; | |
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 | dt = (jiffies - mdev->rs_mark_time) / HZ; | |
95 | ||
96 | if (dt > 20) { | |
97 | /* if we made no update to rs_mark_time for too long, | |
98 | * we are stalled. show that. */ | |
99 | seq_printf(seq, "stalled\n"); | |
100 | return; | |
101 | } | |
102 | ||
103 | if (!dt) | |
104 | dt++; | |
105 | db = mdev->rs_mark_left - rs_left; | |
106 | rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */ | |
107 | ||
108 | seq_printf(seq, "finish: %lu:%02lu:%02lu", | |
109 | rt / 3600, (rt % 3600) / 60, rt % 60); | |
110 | ||
111 | /* current speed average over (SYNC_MARKS * SYNC_MARK_STEP) jiffies */ | |
112 | dbdt = Bit2KB(db/dt); | |
113 | if (dbdt > 1000) | |
114 | seq_printf(seq, " speed: %ld,%03ld", | |
115 | dbdt/1000, dbdt % 1000); | |
116 | else | |
117 | seq_printf(seq, " speed: %ld", dbdt); | |
118 | ||
119 | /* mean speed since syncer started | |
120 | * we do account for PausedSync periods */ | |
121 | dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ; | |
122 | if (dt <= 0) | |
123 | dt = 1; | |
124 | db = mdev->rs_total - rs_left; | |
125 | dbdt = Bit2KB(db/dt); | |
126 | if (dbdt > 1000) | |
127 | seq_printf(seq, " (%ld,%03ld)", | |
128 | dbdt/1000, dbdt % 1000); | |
129 | else | |
130 | seq_printf(seq, " (%ld)", dbdt); | |
131 | ||
132 | seq_printf(seq, " K/sec\n"); | |
133 | } | |
134 | ||
135 | static void resync_dump_detail(struct seq_file *seq, struct lc_element *e) | |
136 | { | |
137 | struct bm_extent *bme = lc_entry(e, struct bm_extent, lce); | |
138 | ||
139 | seq_printf(seq, "%5d %s %s\n", bme->rs_left, | |
140 | bme->flags & BME_NO_WRITES ? "NO_WRITES" : "---------", | |
141 | bme->flags & BME_LOCKED ? "LOCKED" : "------" | |
142 | ); | |
143 | } | |
144 | ||
145 | static int drbd_seq_show(struct seq_file *seq, void *v) | |
146 | { | |
147 | int i, hole = 0; | |
148 | const char *sn; | |
149 | struct drbd_conf *mdev; | |
150 | ||
151 | static char write_ordering_chars[] = { | |
152 | [WO_none] = 'n', | |
153 | [WO_drain_io] = 'd', | |
154 | [WO_bdev_flush] = 'f', | |
155 | [WO_bio_barrier] = 'b', | |
156 | }; | |
157 | ||
158 | seq_printf(seq, "version: " REL_VERSION " (api:%d/proto:%d-%d)\n%s\n", | |
159 | API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX, drbd_buildtag()); | |
160 | ||
161 | /* | |
162 | cs .. connection state | |
163 | ro .. node role (local/remote) | |
164 | ds .. disk state (local/remote) | |
165 | protocol | |
166 | various flags | |
167 | ns .. network send | |
168 | nr .. network receive | |
169 | dw .. disk write | |
170 | dr .. disk read | |
171 | al .. activity log write count | |
172 | bm .. bitmap update write count | |
173 | pe .. pending (waiting for ack or data reply) | |
174 | ua .. unack'd (still need to send ack or data reply) | |
175 | ap .. application requests accepted, but not yet completed | |
176 | ep .. number of epochs currently "on the fly", P_BARRIER_ACK pending | |
177 | wo .. write ordering mode currently in use | |
178 | oos .. known out-of-sync kB | |
179 | */ | |
180 | ||
181 | for (i = 0; i < minor_count; i++) { | |
182 | mdev = minor_to_mdev(i); | |
183 | if (!mdev) { | |
184 | hole = 1; | |
185 | continue; | |
186 | } | |
187 | if (hole) { | |
188 | hole = 0; | |
189 | seq_printf(seq, "\n"); | |
190 | } | |
191 | ||
192 | sn = drbd_conn_str(mdev->state.conn); | |
193 | ||
194 | if (mdev->state.conn == C_STANDALONE && | |
195 | mdev->state.disk == D_DISKLESS && | |
196 | mdev->state.role == R_SECONDARY) { | |
197 | seq_printf(seq, "%2d: cs:Unconfigured\n", i); | |
198 | } else { | |
199 | seq_printf(seq, | |
200 | "%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c\n" | |
201 | " ns:%u nr:%u dw:%u dr:%u al:%u bm:%u " | |
202 | "lo:%d pe:%d ua:%d ap:%d ep:%d wo:%c", | |
203 | i, sn, | |
204 | drbd_role_str(mdev->state.role), | |
205 | drbd_role_str(mdev->state.peer), | |
206 | drbd_disk_str(mdev->state.disk), | |
207 | drbd_disk_str(mdev->state.pdsk), | |
208 | (mdev->net_conf == NULL ? ' ' : | |
209 | (mdev->net_conf->wire_protocol - DRBD_PROT_A+'A')), | |
210 | mdev->state.susp ? 's' : 'r', | |
211 | mdev->state.aftr_isp ? 'a' : '-', | |
212 | mdev->state.peer_isp ? 'p' : '-', | |
213 | mdev->state.user_isp ? 'u' : '-', | |
214 | mdev->congestion_reason ?: '-', | |
215 | mdev->send_cnt/2, | |
216 | mdev->recv_cnt/2, | |
217 | mdev->writ_cnt/2, | |
218 | mdev->read_cnt/2, | |
219 | mdev->al_writ_cnt, | |
220 | mdev->bm_writ_cnt, | |
221 | atomic_read(&mdev->local_cnt), | |
222 | atomic_read(&mdev->ap_pending_cnt) + | |
223 | atomic_read(&mdev->rs_pending_cnt), | |
224 | atomic_read(&mdev->unacked_cnt), | |
225 | atomic_read(&mdev->ap_bio_cnt), | |
226 | mdev->epochs, | |
227 | write_ordering_chars[mdev->write_ordering] | |
228 | ); | |
229 | seq_printf(seq, " oos:%lu\n", | |
230 | Bit2KB(drbd_bm_total_weight(mdev))); | |
231 | } | |
232 | if (mdev->state.conn == C_SYNC_SOURCE || | |
233 | mdev->state.conn == C_SYNC_TARGET) | |
234 | drbd_syncer_progress(mdev, seq); | |
235 | ||
236 | if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T) | |
237 | seq_printf(seq, "\t%3d%% %lu/%lu\n", | |
238 | (int)((mdev->rs_total-mdev->ov_left) / | |
239 | (mdev->rs_total/100+1)), | |
240 | mdev->rs_total - mdev->ov_left, | |
241 | mdev->rs_total); | |
242 | ||
243 | if (proc_details >= 1 && get_ldev_if_state(mdev, D_FAILED)) { | |
244 | lc_seq_printf_stats(seq, mdev->resync); | |
245 | lc_seq_printf_stats(seq, mdev->act_log); | |
246 | put_ldev(mdev); | |
247 | } | |
248 | ||
249 | if (proc_details >= 2) { | |
250 | if (mdev->resync) { | |
251 | lc_seq_dump_details(seq, mdev->resync, "rs_left", | |
252 | resync_dump_detail); | |
253 | } | |
254 | } | |
255 | } | |
256 | ||
257 | return 0; | |
258 | } | |
259 | ||
260 | static int drbd_proc_open(struct inode *inode, struct file *file) | |
261 | { | |
262 | return single_open(file, drbd_seq_show, PDE(inode)->data); | |
263 | } | |
264 | ||
265 | /* PROC FS stuff end */ |