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kernel-fxtec-pro1x/drivers/block/drbd/drbd_proc.c
Linus Torvalds ebb3727779 Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block 
Pull block driver updates from Jens Axboe:
 "It might look big in volume, but when categorized, not a lot of
  drivers are touched.  The pull request contains:

   - mtip32xx fixes from Micron.

   - A slew of drbd updates, this time in a nicer series.

   - bcache, a flash/ssd caching framework from Kent.

   - Fixes for cciss"

* 'for-3.10/drivers' of git://git.kernel.dk/linux-block: (66 commits)
  bcache: Use bd_link_disk_holder()
  bcache: Allocator cleanup/fixes
  cciss: bug fix to prevent cciss from loading in kdump crash kernel
  cciss: add cciss_allow_hpsa module parameter
  drivers/block/mg_disk.c: add CONFIG_PM_SLEEP to suspend/resume functions
  mtip32xx: Workaround for unaligned writes
  bcache: Make sure blocksize isn't smaller than device blocksize
  bcache: Fix merge_bvec_fn usage for when it modifies the bvm
  bcache: Correctly check against BIO_MAX_PAGES
  bcache: Hack around stuff that clones up to bi_max_vecs
  bcache: Set ra_pages based on backing device's ra_pages
  bcache: Take data offset from the bdev superblock.
  mtip32xx: mtip32xx: Disable TRIM support
  mtip32xx: fix a smatch warning
  bcache: Disable broken btree fuzz tester
  bcache: Fix a format string overflow
  bcache: Fix a minor memory leak on device teardown
  bcache: Documentation updates
  bcache: Use WARN_ONCE() instead of __WARN()
  bcache: Add missing #include <linux/prefetch.h>
  ...
2013-05-08 11:51:05 -07:00

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/*
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);
static int drbd_proc_release(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 = drbd_proc_release,
};
void seq_printf_with_thousands_grouping(struct seq_file *seq, long v)
{
/* v is in kB/sec. We don't expect TiByte/sec yet. */
if (unlikely(v >= 1000000)) {
/* cool: > GiByte/s */
seq_printf(seq, "%ld,", v / 1000000);
v %= 1000000;
seq_printf(seq, "%03ld,%03ld", v/1000, v % 1000);
} else if (likely(v >= 1000))
seq_printf(seq, "%ld,%03ld", v/1000, v % 1000);
else
seq_printf(seq, "%ld", v);
}
/*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;
int stalled = 0;
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, "] ");
if (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T)
seq_printf(seq, "verified:");
else
seq_printf(seq, "sync'ed:");
seq_printf(seq, "%3u.%u%% ", res / 10, res % 10);
/* if more than a few GB, display in MB */
if (mdev->rs_total > (4UL << (30 - BM_BLOCK_SHIFT)))
seq_printf(seq, "(%lu/%lu)M",
(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
*/
/* Rolling marks. last_mark+1 may just now be modified. last_mark+2 is
* at least (DRBD_SYNC_MARKS-2)*DRBD_SYNC_MARK_STEP old, and has at
* least DRBD_SYNC_MARK_STEP time before it will be modified. */
/* ------------------------ ~18s average ------------------------ */
i = (mdev->rs_last_mark + 2) % DRBD_SYNC_MARKS;
dt = (jiffies - mdev->rs_mark_time[i]) / HZ;
if (dt > (DRBD_SYNC_MARK_STEP * DRBD_SYNC_MARKS))
stalled = 1;
if (!dt)
dt++;
db = mdev->rs_mark_left[i] - 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);
dbdt = Bit2KB(db/dt);
seq_printf(seq, " speed: ");
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, " (");
/* ------------------------- ~3s average ------------------------ */
if (proc_details >= 1) {
/* this is what drbd_rs_should_slow_down() uses */
i = (mdev->rs_last_mark + DRBD_SYNC_MARKS-1) % DRBD_SYNC_MARKS;
dt = (jiffies - mdev->rs_mark_time[i]) / HZ;
if (!dt)
dt++;
db = mdev->rs_mark_left[i] - rs_left;
dbdt = Bit2KB(db/dt);
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, " -- ");
}
/* --------------------- long term average ---------------------- */
/* 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);
seq_printf_with_thousands_grouping(seq, dbdt);
seq_printf(seq, ")");
if (mdev->state.conn == C_SYNC_TARGET ||
mdev->state.conn == C_VERIFY_S) {
seq_printf(seq, " want: ");
seq_printf_with_thousands_grouping(seq, mdev->c_sync_rate);
}
seq_printf(seq, " K/sec%s\n", stalled ? " (stalled)" : "");
if (proc_details >= 1) {
/* 64 bit:
* we convert to sectors in the display below. */
unsigned long bm_bits = drbd_bm_bits(mdev);
unsigned long bit_pos;
unsigned long long stop_sector = 0;
if (mdev->state.conn == C_VERIFY_S ||
mdev->state.conn == C_VERIFY_T) {
bit_pos = bm_bits - mdev->ov_left;
if (verify_can_do_stop_sector(mdev))
stop_sector = mdev->ov_stop_sector;
} else
bit_pos = mdev->bm_resync_fo;
/* Total sectors may be slightly off for oddly
* sized devices. So what. */
seq_printf(seq,
"\t%3d%% sector pos: %llu/%llu",
(int)(bit_pos / (bm_bits/100+1)),
(unsigned long long)bit_pos * BM_SECT_PER_BIT,
(unsigned long long)bm_bits * BM_SECT_PER_BIT);
if (stop_sector != 0 && stop_sector != ULLONG_MAX)
seq_printf(seq, " stop sector: %llu", stop_sector);
seq_printf(seq, "\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, prev_i = -1;
const char *sn;
struct drbd_conf *mdev;
struct net_conf *nc;
char wp;
static char write_ordering_chars[] = {
[WO_none] = 'n',
[WO_drain_io] = 'd',
[WO_bdev_flush] = 'f',
};
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
*/
rcu_read_lock();
idr_for_each_entry(&minors, mdev, i) {
if (prev_i != i - 1)
seq_printf(seq, "\n");
prev_i = i;
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 {
/* reset mdev->congestion_reason */
bdi_rw_congested(&mdev->rq_queue->backing_dev_info);
nc = rcu_dereference(mdev->tconn->net_conf);
wp = nc ? nc->wire_protocol - DRBD_PROT_A + 'A' : ' ';
seq_printf(seq,
"%2d: cs:%s ro:%s/%s ds:%s/%s %c %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),
wp,
drbd_suspended(mdev) ? 's' : 'r',
mdev->state.aftr_isp ? 'a' : '-',
mdev->state.peer_isp ? 'p' : '-',
mdev->state.user_isp ? 'u' : '-',
mdev->congestion_reason ?: '-',
test_bit(AL_SUSPENDED, &mdev->flags) ? 's' : '-',
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->tconn->epochs,
write_ordering_chars[mdev->tconn->write_ordering]
);
seq_printf(seq, " oos:%llu\n",
Bit2KB((unsigned long long)
drbd_bm_total_weight(mdev)));
}
if (mdev->state.conn == C_SYNC_SOURCE ||
mdev->state.conn == C_SYNC_TARGET ||
mdev->state.conn == C_VERIFY_S ||
mdev->state.conn == C_VERIFY_T)
drbd_syncer_progress(mdev, seq);
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);
}
}
}
rcu_read_unlock();
return 0;
}
static int drbd_proc_open(struct inode *inode, struct file *file)
{
int err;
if (try_module_get(THIS_MODULE)) {
err = single_open(file, drbd_seq_show, PDE_DATA(inode));
if (err)
module_put(THIS_MODULE);
return err;
}
return -ENODEV;
}
static int drbd_proc_release(struct inode *inode, struct file *file)
{
module_put(THIS_MODULE);
return single_release(inode, file);
}
/* PROC FS stuff end */
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