mirror of https://gitee.com/openkylin/linux.git
266 lines
7.3 KiB
C
266 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/slab.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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