forked from Minki/linux
fb22c402ff
There are three ways to get IO suspended: * Loss of any access to data * Fence-peer-handler running * User requested to suspend IO Track those in different bits, so that one condition clearing its state bit does not interfere with the other two conditions. Only when the user resumes IO he overrules all three bits. The fact is hidden from the user, he sees only a single suspend bit. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
273 lines
7.8 KiB
C
273 lines
7.8 KiB
C
/*
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drbd_proc.c
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This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
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Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
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Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
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Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
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drbd is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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drbd is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with drbd; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <asm/uaccess.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/drbd.h>
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#include "drbd_int.h"
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static int drbd_proc_open(struct inode *inode, struct file *file);
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struct proc_dir_entry *drbd_proc;
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const struct file_operations drbd_proc_fops = {
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.owner = THIS_MODULE,
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.open = drbd_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/*lge
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* progress bars shamelessly adapted from driver/md/md.c
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* output looks like
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* [=====>..............] 33.5% (23456/123456)
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* finish: 2:20:20 speed: 6,345 (6,456) K/sec
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*/
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static void drbd_syncer_progress(struct drbd_conf *mdev, struct seq_file *seq)
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{
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unsigned long db, dt, dbdt, rt, rs_left;
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unsigned int res;
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int i, x, y;
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int stalled = 0;
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drbd_get_syncer_progress(mdev, &rs_left, &res);
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x = res/50;
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y = 20-x;
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seq_printf(seq, "\t[");
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for (i = 1; i < x; i++)
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seq_printf(seq, "=");
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seq_printf(seq, ">");
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for (i = 0; i < y; i++)
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seq_printf(seq, ".");
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seq_printf(seq, "] ");
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seq_printf(seq, "sync'ed:%3u.%u%% ", res / 10, res % 10);
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/* if more than 1 GB display in MB */
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if (mdev->rs_total > 0x100000L)
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seq_printf(seq, "(%lu/%lu)M\n\t",
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(unsigned long) Bit2KB(rs_left >> 10),
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(unsigned long) Bit2KB(mdev->rs_total >> 10));
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else
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seq_printf(seq, "(%lu/%lu)K\n\t",
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(unsigned long) Bit2KB(rs_left),
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(unsigned long) Bit2KB(mdev->rs_total));
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/* see drivers/md/md.c
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* We do not want to overflow, so the order of operands and
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* the * 100 / 100 trick are important. We do a +1 to be
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* safe against division by zero. We only estimate anyway.
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*
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* dt: time from mark until now
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* db: blocks written from mark until now
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* rt: remaining time
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*/
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/* Rolling marks. last_mark+1 may just now be modified. last_mark+2 is
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* at least (DRBD_SYNC_MARKS-2)*DRBD_SYNC_MARK_STEP old, and has at
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* least DRBD_SYNC_MARK_STEP time before it will be modified. */
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i = (mdev->rs_last_mark + 2) % DRBD_SYNC_MARKS;
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dt = (jiffies - mdev->rs_mark_time[i]) / HZ;
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if (dt > (DRBD_SYNC_MARK_STEP * DRBD_SYNC_MARKS))
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stalled = 1;
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if (!dt)
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dt++;
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db = mdev->rs_mark_left[i] - rs_left;
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rt = (dt * (rs_left / (db/100+1)))/100; /* seconds */
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seq_printf(seq, "finish: %lu:%02lu:%02lu",
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rt / 3600, (rt % 3600) / 60, rt % 60);
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/* current speed average over (SYNC_MARKS * SYNC_MARK_STEP) jiffies */
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dbdt = Bit2KB(db/dt);
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if (dbdt > 1000)
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seq_printf(seq, " speed: %ld,%03ld",
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dbdt/1000, dbdt % 1000);
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else
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seq_printf(seq, " speed: %ld", dbdt);
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/* mean speed since syncer started
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* we do account for PausedSync periods */
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dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ;
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if (dt <= 0)
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dt = 1;
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db = mdev->rs_total - rs_left;
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dbdt = Bit2KB(db/dt);
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if (dbdt > 1000)
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seq_printf(seq, " (%ld,%03ld)",
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dbdt/1000, dbdt % 1000);
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else
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seq_printf(seq, " (%ld)", dbdt);
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if (mdev->state.conn == C_SYNC_TARGET) {
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if (mdev->c_sync_rate > 1000)
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seq_printf(seq, " want: %d,%03d",
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mdev->c_sync_rate / 1000, mdev->c_sync_rate % 1000);
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else
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seq_printf(seq, " want: %d", mdev->c_sync_rate);
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}
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seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : "");
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}
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static void resync_dump_detail(struct seq_file *seq, struct lc_element *e)
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{
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struct bm_extent *bme = lc_entry(e, struct bm_extent, lce);
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seq_printf(seq, "%5d %s %s\n", bme->rs_left,
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bme->flags & BME_NO_WRITES ? "NO_WRITES" : "---------",
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bme->flags & BME_LOCKED ? "LOCKED" : "------"
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);
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}
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static int drbd_seq_show(struct seq_file *seq, void *v)
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{
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int i, hole = 0;
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const char *sn;
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struct drbd_conf *mdev;
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static char write_ordering_chars[] = {
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[WO_none] = 'n',
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[WO_drain_io] = 'd',
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[WO_bdev_flush] = 'f',
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[WO_bio_barrier] = 'b',
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};
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seq_printf(seq, "version: " REL_VERSION " (api:%d/proto:%d-%d)\n%s\n",
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API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX, drbd_buildtag());
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/*
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cs .. connection state
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ro .. node role (local/remote)
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ds .. disk state (local/remote)
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protocol
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various flags
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ns .. network send
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nr .. network receive
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dw .. disk write
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dr .. disk read
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al .. activity log write count
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bm .. bitmap update write count
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pe .. pending (waiting for ack or data reply)
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ua .. unack'd (still need to send ack or data reply)
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ap .. application requests accepted, but not yet completed
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ep .. number of epochs currently "on the fly", P_BARRIER_ACK pending
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wo .. write ordering mode currently in use
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oos .. known out-of-sync kB
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*/
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for (i = 0; i < minor_count; i++) {
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mdev = minor_to_mdev(i);
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if (!mdev) {
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hole = 1;
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continue;
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}
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if (hole) {
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hole = 0;
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seq_printf(seq, "\n");
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}
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sn = drbd_conn_str(mdev->state.conn);
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if (mdev->state.conn == C_STANDALONE &&
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mdev->state.disk == D_DISKLESS &&
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mdev->state.role == R_SECONDARY) {
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seq_printf(seq, "%2d: cs:Unconfigured\n", i);
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} else {
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seq_printf(seq,
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"%2d: cs:%s ro:%s/%s ds:%s/%s %c %c%c%c%c%c%c\n"
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" ns:%u nr:%u dw:%u dr:%u al:%u bm:%u "
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"lo:%d pe:%d ua:%d ap:%d ep:%d wo:%c",
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i, sn,
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drbd_role_str(mdev->state.role),
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drbd_role_str(mdev->state.peer),
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drbd_disk_str(mdev->state.disk),
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drbd_disk_str(mdev->state.pdsk),
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(mdev->net_conf == NULL ? ' ' :
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(mdev->net_conf->wire_protocol - DRBD_PROT_A+'A')),
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is_susp(mdev->state) ? 's' : 'r',
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mdev->state.aftr_isp ? 'a' : '-',
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mdev->state.peer_isp ? 'p' : '-',
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mdev->state.user_isp ? 'u' : '-',
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mdev->congestion_reason ?: '-',
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test_bit(AL_SUSPENDED, &mdev->flags) ? 's' : '-',
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mdev->send_cnt/2,
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mdev->recv_cnt/2,
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mdev->writ_cnt/2,
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mdev->read_cnt/2,
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mdev->al_writ_cnt,
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mdev->bm_writ_cnt,
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atomic_read(&mdev->local_cnt),
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atomic_read(&mdev->ap_pending_cnt) +
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atomic_read(&mdev->rs_pending_cnt),
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atomic_read(&mdev->unacked_cnt),
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atomic_read(&mdev->ap_bio_cnt),
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mdev->epochs,
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write_ordering_chars[mdev->write_ordering]
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);
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seq_printf(seq, " oos:%lu\n",
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Bit2KB(drbd_bm_total_weight(mdev)));
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}
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if (mdev->state.conn == C_SYNC_SOURCE ||
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mdev->state.conn == C_SYNC_TARGET)
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drbd_syncer_progress(mdev, seq);
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if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T)
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seq_printf(seq, "\t%3d%% %lu/%lu\n",
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(int)((mdev->rs_total-mdev->ov_left) /
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(mdev->rs_total/100+1)),
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mdev->rs_total - mdev->ov_left,
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mdev->rs_total);
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if (proc_details >= 1 && get_ldev_if_state(mdev, D_FAILED)) {
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lc_seq_printf_stats(seq, mdev->resync);
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lc_seq_printf_stats(seq, mdev->act_log);
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put_ldev(mdev);
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}
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if (proc_details >= 2) {
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if (mdev->resync) {
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lc_seq_dump_details(seq, mdev->resync, "rs_left",
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resync_dump_detail);
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}
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}
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}
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return 0;
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}
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static int drbd_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, drbd_seq_show, PDE(inode)->data);
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}
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/* PROC FS stuff end */
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