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![Lars Ellenberg](/assets/img/avatar_default.png)
It was a now abandoned attempt to throttle resync bandwidth based on the delay it causes on the bulk data socket. It has no userbase yet, and has been disabled by 9173465ccb51c09cc3102a10af93e9f469a0af6f already. This removes the now unused code. The basic feature, namely using up "idle" bandwith of network and disk IO subsystem, with minimal impact to application IO, is being reimplemented differently. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
264 lines
7.3 KiB
C
264 lines
7.3 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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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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dt = (jiffies - mdev->rs_mark_time) / HZ;
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if (dt > 20) {
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/* if we made no update to rs_mark_time for too long,
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* we are stalled. show that. */
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seq_printf(seq, "stalled\n");
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return;
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}
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if (!dt)
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dt++;
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db = mdev->rs_mark_left - 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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seq_printf(seq, " K/sec\n");
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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\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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mdev->state.susp ? '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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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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