[linux-2.6-block.git] / drivers / block / drbd / drbd_proc.c

/*
   drbd_proc.c

   This file is part of DRBD by Philipp Reisner and Lars Ellenberg.

   Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
   Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
   Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.

   drbd is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   drbd is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with drbd; see the file COPYING.  If not, write to
   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#include <linux/module.h>

#include <asm/uaccess.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/drbd.h>
#include "drbd_int.h"

static int drbd_proc_open(struct inode *inode, struct file *file);


struct proc_dir_entry *drbd_proc;
const struct file_operations drbd_proc_fops = {
	.owner		= THIS_MODULE,
	.open		= drbd_proc_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};


/*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)
{
	unsigned long db, dt, dbdt, rt, rs_left;
	unsigned int res;
	int i, x, y;

	drbd_get_syncer_progress(mdev, &rs_left, &res);

	x = res/50;
	y = 20-x;
	seq_printf(seq, "\t[");
	for (i = 1; i < x; i++)
		seq_printf(seq, "=");
	seq_printf(seq, ">");
	for (i = 0; i < y; i++)
		seq_printf(seq, ".");
	seq_printf(seq, "] ");

	seq_printf(seq, "sync'ed:%3u.%u%% ", res / 10, res % 10);
	/* if more than 1 GB display in MB */
	if (mdev->rs_total > 0x100000L)
		seq_printf(seq, "(%lu/%lu)M\n\t",
			    (unsigned long) Bit2KB(rs_left >> 10),
			    (unsigned long) Bit2KB(mdev->rs_total >> 10));
	else
		seq_printf(seq, "(%lu/%lu)K\n\t",
			    (unsigned long) Bit2KB(rs_left),
			    (unsigned long) Bit2KB(mdev->rs_total));

	/* see drivers/md/md.c
	 * We do not want to overflow, so the order of operands and
	 * the * 100 / 100 trick are important. We do a +1 to be
	 * safe against division by zero. We only estimate anyway.
	 *
	 * dt: time from mark until now
	 * db: blocks written from mark until now
	 * rt: remaining time
	 */
	dt = (jiffies - mdev->rs_mark_time) / HZ;

	if (dt > 20) {
		/* if we made no update to rs_mark_time for too long,
		 * we are stalled. show that. */
		seq_printf(seq, "stalled\n");
		return;
	}

	if (!dt)
		dt++;
	db = mdev->rs_mark_left - rs_left;
	rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */

	seq_printf(seq, "finish: %lu:%02lu:%02lu",
		rt / 3600, (rt % 3600) / 60, rt % 60);

	/* current speed average over (SYNC_MARKS * SYNC_MARK_STEP) jiffies */
	dbdt = Bit2KB(db/dt);
	if (dbdt > 1000)
		seq_printf(seq, " speed: %ld,%03ld",
			dbdt/1000, dbdt % 1000);
	else
		seq_printf(seq, " speed: %ld", dbdt);

	/* mean speed since syncer started
	 * we do account for PausedSync periods */
	dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ;
	if (dt <= 0)
		dt = 1;
	db = mdev->rs_total - rs_left;
	dbdt = Bit2KB(db/dt);
	if (dbdt > 1000)
		seq_printf(seq, " (%ld,%03ld)",
			dbdt/1000, dbdt % 1000);
	else
		seq_printf(seq, " (%ld)", dbdt);

	seq_printf(seq, " K/sec\n");
}

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, hole = 0;
	const char *sn;
	struct drbd_conf *mdev;

	static char write_ordering_chars[] = {
		[WO_none] = 'n',
		[WO_drain_io] = 'd',
		[WO_bdev_flush] = 'f',
		[WO_bio_barrier] = 'b',
	};

	seq_printf(seq, "version: " REL_VERSION " (api:%d/proto:%d-%d)\n%s\n",
		   API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX, drbd_buildtag());

	/*
	  cs .. connection state
	  ro .. node role (local/remote)
	  ds .. disk state (local/remote)
	     protocol
	     various flags
	  ns .. network send
	  nr .. network receive
	  dw .. disk write
	  dr .. disk read
	  al .. activity log write count
	  bm .. bitmap update write count
	  pe .. pending (waiting for ack or data reply)
	  ua .. unack'd (still need to send ack or data reply)
	  ap .. application requests accepted, but not yet completed
	  ep .. number of epochs currently "on the fly", P_BARRIER_ACK pending
	  wo .. write ordering mode currently in use
	 oos .. known out-of-sync kB
	*/

	for (i = 0; i < minor_count; i++) {
		mdev = minor_to_mdev(i);
		if (!mdev) {
			hole = 1;
			continue;
		}
		if (hole) {
			hole = 0;
			seq_printf(seq, "\n");
		}

		sn = drbd_conn_str(mdev->state.conn);

		if (mdev->state.conn == C_STANDALONE &&
		    mdev->state.disk == D_DISKLESS &&
		    mdev->state.role == R_SECONDARY) {
			seq_printf(seq, "%2d: cs:Unconfigured\n", i);
		} else {
			seq_printf(seq,
			   "%2d: cs:%s ro:%s/%s ds:%s/%s %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),
			   (mdev->net_conf == NULL ? ' ' :
			    (mdev->net_conf->wire_protocol - DRBD_PROT_A+'A')),
			   mdev->state.susp ? 's' : 'r',
			   mdev->state.aftr_isp ? 'a' : '-',
			   mdev->state.peer_isp ? 'p' : '-',
			   mdev->state.user_isp ? 'u' : '-',
			   mdev->congestion_reason ?: '-',
			   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->epochs,
			   write_ordering_chars[mdev->write_ordering]
			);
			seq_printf(seq, " oos:%lu\n",
				   Bit2KB(drbd_bm_total_weight(mdev)));
		}
		if (mdev->state.conn == C_SYNC_SOURCE ||
		    mdev->state.conn == C_SYNC_TARGET)
			drbd_syncer_progress(mdev, seq);

		if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T)
			seq_printf(seq, "\t%3d%%      %lu/%lu\n",
				   (int)((mdev->rs_total-mdev->ov_left) /
					 (mdev->rs_total/100+1)),
				   mdev->rs_total - mdev->ov_left,
				   mdev->rs_total);

		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 (proc_details >= 2) {
			if (mdev->resync) {
				lc_seq_dump_details(seq, mdev->resync, "rs_left",
					resync_dump_detail);
			}
		}
	}

	return 0;
}

static int drbd_proc_open(struct inode *inode, struct file *file)
{
	return single_open(file, drbd_seq_show, PDE(inode)->data);
}

/* PROC FS stuff end */
Commit	Line	Data
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>
b411b363 PR	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;
7d4e9d09	40	const struct file_operations drbd_proc_fops = {
b411b363 PR	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
	61	drbd_get_syncer_progress(mdev, &rs_left, &res);
	62
	63	x = res/50;
	64	y = 20-x;
	65	seq_printf(seq, "\t[");
	66	for (i = 1; i < x; i++)
	67	seq_printf(seq, "=");
	68	seq_printf(seq, ">");
	69	for (i = 0; i < y; i++)
	70	seq_printf(seq, ".");
	71	seq_printf(seq, "] ");
	72
	73	seq_printf(seq, "sync'ed:%3u.%u%% ", res / 10, res % 10);
	74	/* if more than 1 GB display in MB */
	75	if (mdev->rs_total > 0x100000L)
	76	seq_printf(seq, "(%lu/%lu)M\n\t",
	77	(unsigned long) Bit2KB(rs_left >> 10),
	78	(unsigned long) Bit2KB(mdev->rs_total >> 10));
	79	else
	80	seq_printf(seq, "(%lu/%lu)K\n\t",
	81	(unsigned long) Bit2KB(rs_left),
	82	(unsigned long) Bit2KB(mdev->rs_total));
	83
	84	/* see drivers/md/md.c
	85	* We do not want to overflow, so the order of operands and
	86	* the * 100 / 100 trick are important. We do a +1 to be
	87	* safe against division by zero. We only estimate anyway.
	88	*
	89	* dt: time from mark until now
	90	* db: blocks written from mark until now
	91	* rt: remaining time
	92	*/
	93	dt = (jiffies - mdev->rs_mark_time) / HZ;
	94
	95	if (dt > 20) {
	96	/* if we made no update to rs_mark_time for too long,
	97	* we are stalled. show that. */
	98	seq_printf(seq, "stalled\n");
	99	return;
	100	}
	101
	102	if (!dt)
	103	dt++;
	104	db = mdev->rs_mark_left - 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	seq_printf(seq, " K/sec\n");
132	}
133
134	static void resync_dump_detail(struct seq_file seq, struct lc_element e)
135	{
136	struct bm_extent *bme = lc_entry(e, struct bm_extent, lce);
137
138	seq_printf(seq, "%5d %s %s\n", bme->rs_left,
139	bme->flags & BME_NO_WRITES ? "NO_WRITES" : "---------",
140	bme->flags & BME_LOCKED ? "LOCKED" : "------"
141	);
142	}
143
144	static int drbd_seq_show(struct seq_file seq, void v)
145	{
146	int i, hole = 0;
147	const char *sn;
148	struct drbd_conf *mdev;
149
150	static char write_ordering_chars[] = {
151	[WO_none] = 'n',
152	[WO_drain_io] = 'd',
153	[WO_bdev_flush] = 'f',
154	[WO_bio_barrier] = 'b',
155	};
156
157	seq_printf(seq, "version: " REL_VERSION " (api:%d/proto:%d-%d)\n%s\n",
158	API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX, drbd_buildtag());
159
160	/*
161	cs .. connection state
162	ro .. node role (local/remote)
163	ds .. disk state (local/remote)
164	protocol
165	various flags
166	ns .. network send
167	nr .. network receive
168	dw .. disk write
169	dr .. disk read
170	al .. activity log write count
171	bm .. bitmap update write count
172	pe .. pending (waiting for ack or data reply)
173	ua .. unack'd (still need to send ack or data reply)
174	ap .. application requests accepted, but not yet completed
175	ep .. number of epochs currently "on the fly", P_BARRIER_ACK pending
176	wo .. write ordering mode currently in use
177	oos .. known out-of-sync kB
178	*/
179
180	for (i = 0; i < minor_count; i++) {
181	mdev = minor_to_mdev(i);
182	if (!mdev) {
183	hole = 1;
184	continue;
185	}
186	if (hole) {
187	hole = 0;
188	seq_printf(seq, "\n");
189	}
190
191	sn = drbd_conn_str(mdev->state.conn);
192
193	if (mdev->state.conn == C_STANDALONE &&
194	mdev->state.disk == D_DISKLESS &&
195	mdev->state.role == R_SECONDARY) {
196	seq_printf(seq, "%2d: cs:Unconfigured\n", i);
197	} else {
198	seq_printf(seq,
199	"%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c\n"
200	" ns:%u nr:%u dw:%u dr:%u al:%u bm:%u "
201	"lo:%d pe:%d ua:%d ap:%d ep:%d wo:%c",
202	i, sn,
203	drbd_role_str(mdev->state.role),
204	drbd_role_str(mdev->state.peer),
205	drbd_disk_str(mdev->state.disk),
206	drbd_disk_str(mdev->state.pdsk),
207	(mdev->net_conf == NULL ? ' ' :
208	(mdev->net_conf->wire_protocol - DRBD_PROT_A+'A')),
209	mdev->state.susp ? 's' : 'r',
210	mdev->state.aftr_isp ? 'a' : '-',
211	mdev->state.peer_isp ? 'p' : '-',
212	mdev->state.user_isp ? 'u' : '-',
213	mdev->congestion_reason ?: '-',
214	mdev->send_cnt/2,
215	mdev->recv_cnt/2,
216	mdev->writ_cnt/2,
217	mdev->read_cnt/2,
218	mdev->al_writ_cnt,
219	mdev->bm_writ_cnt,
220	atomic_read(&mdev->local_cnt),
221	atomic_read(&mdev->ap_pending_cnt) +
222	atomic_read(&mdev->rs_pending_cnt),
223	atomic_read(&mdev->unacked_cnt),
224	atomic_read(&mdev->ap_bio_cnt),
225	mdev->epochs,
226	write_ordering_chars[mdev->write_ordering]
227	);
228	seq_printf(seq, " oos:%lu\n",
229	Bit2KB(drbd_bm_total_weight(mdev)));
230	}
231	if (mdev->state.conn == C_SYNC_SOURCE \|\|
232	mdev->state.conn == C_SYNC_TARGET)
233	drbd_syncer_progress(mdev, seq);
234
235	if (mdev->state.conn == C_VERIFY_S \|\| mdev->state.conn == C_VERIFY_T)
236	seq_printf(seq, "\t%3d%% %lu/%lu\n",
237	(int)((mdev->rs_total-mdev->ov_left) /
238	(mdev->rs_total/100+1)),
239	mdev->rs_total - mdev->ov_left,
240	mdev->rs_total);
241
242	if (proc_details >= 1 && get_ldev_if_state(mdev, D_FAILED)) {
243	lc_seq_printf_stats(seq, mdev->resync);
244	lc_seq_printf_stats(seq, mdev->act_log);
245	put_ldev(mdev);
246	}
247
248	if (proc_details >= 2) {
249	if (mdev->resync) {
250	lc_seq_dump_details(seq, mdev->resync, "rs_left",
251	resync_dump_detail);
252	}
253	}
254	}
255
256	return 0;
257	}
258
259	static int drbd_proc_open(struct inode inode, struct file file)
260	{
261	return single_open(file, drbd_seq_show, PDE(inode)->data);
262	}
263
264	/* PROC FS stuff end */