mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 08:19:28 +00:00
1765 lines
42 KiB
C
1765 lines
42 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/bio.h>
|
|
#include <linux/sched/signal.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/statfs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/kthread.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
#include <linux/crc32.h>
|
|
#include <linux/time.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/writeback.h>
|
|
#include <linux/backing-dev.h>
|
|
#include <linux/kernel.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "bmap.h"
|
|
#include "dir.h"
|
|
#include "glock.h"
|
|
#include "glops.h"
|
|
#include "inode.h"
|
|
#include "log.h"
|
|
#include "meta_io.h"
|
|
#include "quota.h"
|
|
#include "recovery.h"
|
|
#include "rgrp.h"
|
|
#include "super.h"
|
|
#include "trans.h"
|
|
#include "util.h"
|
|
#include "sys.h"
|
|
#include "xattr.h"
|
|
|
|
#define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)
|
|
|
|
enum {
|
|
Opt_lockproto,
|
|
Opt_locktable,
|
|
Opt_hostdata,
|
|
Opt_spectator,
|
|
Opt_ignore_local_fs,
|
|
Opt_localflocks,
|
|
Opt_localcaching,
|
|
Opt_debug,
|
|
Opt_nodebug,
|
|
Opt_upgrade,
|
|
Opt_acl,
|
|
Opt_noacl,
|
|
Opt_quota_off,
|
|
Opt_quota_account,
|
|
Opt_quota_on,
|
|
Opt_quota,
|
|
Opt_noquota,
|
|
Opt_suiddir,
|
|
Opt_nosuiddir,
|
|
Opt_data_writeback,
|
|
Opt_data_ordered,
|
|
Opt_meta,
|
|
Opt_discard,
|
|
Opt_nodiscard,
|
|
Opt_commit,
|
|
Opt_err_withdraw,
|
|
Opt_err_panic,
|
|
Opt_statfs_quantum,
|
|
Opt_statfs_percent,
|
|
Opt_quota_quantum,
|
|
Opt_barrier,
|
|
Opt_nobarrier,
|
|
Opt_rgrplvb,
|
|
Opt_norgrplvb,
|
|
Opt_loccookie,
|
|
Opt_noloccookie,
|
|
Opt_error,
|
|
};
|
|
|
|
static const match_table_t tokens = {
|
|
{Opt_lockproto, "lockproto=%s"},
|
|
{Opt_locktable, "locktable=%s"},
|
|
{Opt_hostdata, "hostdata=%s"},
|
|
{Opt_spectator, "spectator"},
|
|
{Opt_spectator, "norecovery"},
|
|
{Opt_ignore_local_fs, "ignore_local_fs"},
|
|
{Opt_localflocks, "localflocks"},
|
|
{Opt_localcaching, "localcaching"},
|
|
{Opt_debug, "debug"},
|
|
{Opt_nodebug, "nodebug"},
|
|
{Opt_upgrade, "upgrade"},
|
|
{Opt_acl, "acl"},
|
|
{Opt_noacl, "noacl"},
|
|
{Opt_quota_off, "quota=off"},
|
|
{Opt_quota_account, "quota=account"},
|
|
{Opt_quota_on, "quota=on"},
|
|
{Opt_quota, "quota"},
|
|
{Opt_noquota, "noquota"},
|
|
{Opt_suiddir, "suiddir"},
|
|
{Opt_nosuiddir, "nosuiddir"},
|
|
{Opt_data_writeback, "data=writeback"},
|
|
{Opt_data_ordered, "data=ordered"},
|
|
{Opt_meta, "meta"},
|
|
{Opt_discard, "discard"},
|
|
{Opt_nodiscard, "nodiscard"},
|
|
{Opt_commit, "commit=%d"},
|
|
{Opt_err_withdraw, "errors=withdraw"},
|
|
{Opt_err_panic, "errors=panic"},
|
|
{Opt_statfs_quantum, "statfs_quantum=%d"},
|
|
{Opt_statfs_percent, "statfs_percent=%d"},
|
|
{Opt_quota_quantum, "quota_quantum=%d"},
|
|
{Opt_barrier, "barrier"},
|
|
{Opt_nobarrier, "nobarrier"},
|
|
{Opt_rgrplvb, "rgrplvb"},
|
|
{Opt_norgrplvb, "norgrplvb"},
|
|
{Opt_loccookie, "loccookie"},
|
|
{Opt_noloccookie, "noloccookie"},
|
|
{Opt_error, NULL}
|
|
};
|
|
|
|
/**
|
|
* gfs2_mount_args - Parse mount options
|
|
* @args: The structure into which the parsed options will be written
|
|
* @options: The options to parse
|
|
*
|
|
* Return: errno
|
|
*/
|
|
|
|
int gfs2_mount_args(struct gfs2_args *args, char *options)
|
|
{
|
|
char *o;
|
|
int token;
|
|
substring_t tmp[MAX_OPT_ARGS];
|
|
int rv;
|
|
|
|
/* Split the options into tokens with the "," character and
|
|
process them */
|
|
|
|
while (1) {
|
|
o = strsep(&options, ",");
|
|
if (o == NULL)
|
|
break;
|
|
if (*o == '\0')
|
|
continue;
|
|
|
|
token = match_token(o, tokens, tmp);
|
|
switch (token) {
|
|
case Opt_lockproto:
|
|
match_strlcpy(args->ar_lockproto, &tmp[0],
|
|
GFS2_LOCKNAME_LEN);
|
|
break;
|
|
case Opt_locktable:
|
|
match_strlcpy(args->ar_locktable, &tmp[0],
|
|
GFS2_LOCKNAME_LEN);
|
|
break;
|
|
case Opt_hostdata:
|
|
match_strlcpy(args->ar_hostdata, &tmp[0],
|
|
GFS2_LOCKNAME_LEN);
|
|
break;
|
|
case Opt_spectator:
|
|
args->ar_spectator = 1;
|
|
break;
|
|
case Opt_ignore_local_fs:
|
|
/* Retained for backwards compat only */
|
|
break;
|
|
case Opt_localflocks:
|
|
args->ar_localflocks = 1;
|
|
break;
|
|
case Opt_localcaching:
|
|
/* Retained for backwards compat only */
|
|
break;
|
|
case Opt_debug:
|
|
if (args->ar_errors == GFS2_ERRORS_PANIC) {
|
|
pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
|
|
return -EINVAL;
|
|
}
|
|
args->ar_debug = 1;
|
|
break;
|
|
case Opt_nodebug:
|
|
args->ar_debug = 0;
|
|
break;
|
|
case Opt_upgrade:
|
|
/* Retained for backwards compat only */
|
|
break;
|
|
case Opt_acl:
|
|
args->ar_posix_acl = 1;
|
|
break;
|
|
case Opt_noacl:
|
|
args->ar_posix_acl = 0;
|
|
break;
|
|
case Opt_quota_off:
|
|
case Opt_noquota:
|
|
args->ar_quota = GFS2_QUOTA_OFF;
|
|
break;
|
|
case Opt_quota_account:
|
|
args->ar_quota = GFS2_QUOTA_ACCOUNT;
|
|
break;
|
|
case Opt_quota_on:
|
|
case Opt_quota:
|
|
args->ar_quota = GFS2_QUOTA_ON;
|
|
break;
|
|
case Opt_suiddir:
|
|
args->ar_suiddir = 1;
|
|
break;
|
|
case Opt_nosuiddir:
|
|
args->ar_suiddir = 0;
|
|
break;
|
|
case Opt_data_writeback:
|
|
args->ar_data = GFS2_DATA_WRITEBACK;
|
|
break;
|
|
case Opt_data_ordered:
|
|
args->ar_data = GFS2_DATA_ORDERED;
|
|
break;
|
|
case Opt_meta:
|
|
args->ar_meta = 1;
|
|
break;
|
|
case Opt_discard:
|
|
args->ar_discard = 1;
|
|
break;
|
|
case Opt_nodiscard:
|
|
args->ar_discard = 0;
|
|
break;
|
|
case Opt_commit:
|
|
rv = match_int(&tmp[0], &args->ar_commit);
|
|
if (rv || args->ar_commit <= 0) {
|
|
pr_warn("commit mount option requires a positive numeric argument\n");
|
|
return rv ? rv : -EINVAL;
|
|
}
|
|
break;
|
|
case Opt_statfs_quantum:
|
|
rv = match_int(&tmp[0], &args->ar_statfs_quantum);
|
|
if (rv || args->ar_statfs_quantum < 0) {
|
|
pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n");
|
|
return rv ? rv : -EINVAL;
|
|
}
|
|
break;
|
|
case Opt_quota_quantum:
|
|
rv = match_int(&tmp[0], &args->ar_quota_quantum);
|
|
if (rv || args->ar_quota_quantum <= 0) {
|
|
pr_warn("quota_quantum mount option requires a positive numeric argument\n");
|
|
return rv ? rv : -EINVAL;
|
|
}
|
|
break;
|
|
case Opt_statfs_percent:
|
|
rv = match_int(&tmp[0], &args->ar_statfs_percent);
|
|
if (rv || args->ar_statfs_percent < 0 ||
|
|
args->ar_statfs_percent > 100) {
|
|
pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n");
|
|
return rv ? rv : -EINVAL;
|
|
}
|
|
break;
|
|
case Opt_err_withdraw:
|
|
args->ar_errors = GFS2_ERRORS_WITHDRAW;
|
|
break;
|
|
case Opt_err_panic:
|
|
if (args->ar_debug) {
|
|
pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
|
|
return -EINVAL;
|
|
}
|
|
args->ar_errors = GFS2_ERRORS_PANIC;
|
|
break;
|
|
case Opt_barrier:
|
|
args->ar_nobarrier = 0;
|
|
break;
|
|
case Opt_nobarrier:
|
|
args->ar_nobarrier = 1;
|
|
break;
|
|
case Opt_rgrplvb:
|
|
args->ar_rgrplvb = 1;
|
|
break;
|
|
case Opt_norgrplvb:
|
|
args->ar_rgrplvb = 0;
|
|
break;
|
|
case Opt_loccookie:
|
|
args->ar_loccookie = 1;
|
|
break;
|
|
case Opt_noloccookie:
|
|
args->ar_loccookie = 0;
|
|
break;
|
|
case Opt_error:
|
|
default:
|
|
pr_warn("invalid mount option: %s\n", o);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_jindex_free - Clear all the journal index information
|
|
* @sdp: The GFS2 superblock
|
|
*
|
|
*/
|
|
|
|
void gfs2_jindex_free(struct gfs2_sbd *sdp)
|
|
{
|
|
struct list_head list;
|
|
struct gfs2_jdesc *jd;
|
|
|
|
spin_lock(&sdp->sd_jindex_spin);
|
|
list_add(&list, &sdp->sd_jindex_list);
|
|
list_del_init(&sdp->sd_jindex_list);
|
|
sdp->sd_journals = 0;
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
|
|
while (!list_empty(&list)) {
|
|
jd = list_entry(list.next, struct gfs2_jdesc, jd_list);
|
|
gfs2_free_journal_extents(jd);
|
|
list_del(&jd->jd_list);
|
|
iput(jd->jd_inode);
|
|
kfree(jd);
|
|
}
|
|
}
|
|
|
|
static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid)
|
|
{
|
|
struct gfs2_jdesc *jd;
|
|
int found = 0;
|
|
|
|
list_for_each_entry(jd, head, jd_list) {
|
|
if (jd->jd_jid == jid) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!found)
|
|
jd = NULL;
|
|
|
|
return jd;
|
|
}
|
|
|
|
struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid)
|
|
{
|
|
struct gfs2_jdesc *jd;
|
|
|
|
spin_lock(&sdp->sd_jindex_spin);
|
|
jd = jdesc_find_i(&sdp->sd_jindex_list, jid);
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
|
|
return jd;
|
|
}
|
|
|
|
int gfs2_jdesc_check(struct gfs2_jdesc *jd)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
|
|
u64 size = i_size_read(jd->jd_inode);
|
|
|
|
if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30)))
|
|
return -EIO;
|
|
|
|
jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift;
|
|
|
|
if (gfs2_write_alloc_required(ip, 0, size)) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int init_threads(struct gfs2_sbd *sdp)
|
|
{
|
|
struct task_struct *p;
|
|
int error = 0;
|
|
|
|
p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
|
|
if (IS_ERR(p)) {
|
|
error = PTR_ERR(p);
|
|
fs_err(sdp, "can't start logd thread: %d\n", error);
|
|
return error;
|
|
}
|
|
sdp->sd_logd_process = p;
|
|
|
|
p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
|
|
if (IS_ERR(p)) {
|
|
error = PTR_ERR(p);
|
|
fs_err(sdp, "can't start quotad thread: %d\n", error);
|
|
goto fail;
|
|
}
|
|
sdp->sd_quotad_process = p;
|
|
return 0;
|
|
|
|
fail:
|
|
kthread_stop(sdp->sd_logd_process);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one
|
|
* @sdp: the filesystem
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
|
|
struct gfs2_glock *j_gl = ip->i_gl;
|
|
struct gfs2_holder freeze_gh;
|
|
struct gfs2_log_header_host head;
|
|
int error;
|
|
|
|
error = init_threads(sdp);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
|
|
&freeze_gh);
|
|
if (error)
|
|
goto fail_threads;
|
|
|
|
j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
|
|
|
|
error = gfs2_find_jhead(sdp->sd_jdesc, &head);
|
|
if (error)
|
|
goto fail;
|
|
|
|
if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
|
|
gfs2_consist(sdp);
|
|
error = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
/* Initialize some head of the log stuff */
|
|
sdp->sd_log_sequence = head.lh_sequence + 1;
|
|
gfs2_log_pointers_init(sdp, head.lh_blkno);
|
|
|
|
error = gfs2_quota_init(sdp);
|
|
if (error)
|
|
goto fail;
|
|
|
|
set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
|
|
|
|
gfs2_glock_dq_uninit(&freeze_gh);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
freeze_gh.gh_flags |= GL_NOCACHE;
|
|
gfs2_glock_dq_uninit(&freeze_gh);
|
|
fail_threads:
|
|
kthread_stop(sdp->sd_quotad_process);
|
|
kthread_stop(sdp->sd_logd_process);
|
|
return error;
|
|
}
|
|
|
|
void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
|
|
{
|
|
const struct gfs2_statfs_change *str = buf;
|
|
|
|
sc->sc_total = be64_to_cpu(str->sc_total);
|
|
sc->sc_free = be64_to_cpu(str->sc_free);
|
|
sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
|
|
}
|
|
|
|
static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
|
|
{
|
|
struct gfs2_statfs_change *str = buf;
|
|
|
|
str->sc_total = cpu_to_be64(sc->sc_total);
|
|
str->sc_free = cpu_to_be64(sc->sc_free);
|
|
str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
|
|
}
|
|
|
|
int gfs2_statfs_init(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
|
|
struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
|
|
struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
|
|
struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
|
|
struct buffer_head *m_bh, *l_bh;
|
|
struct gfs2_holder gh;
|
|
int error;
|
|
|
|
error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
|
|
&gh);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_meta_inode_buffer(m_ip, &m_bh);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (sdp->sd_args.ar_spectator) {
|
|
spin_lock(&sdp->sd_statfs_spin);
|
|
gfs2_statfs_change_in(m_sc, m_bh->b_data +
|
|
sizeof(struct gfs2_dinode));
|
|
spin_unlock(&sdp->sd_statfs_spin);
|
|
} else {
|
|
error = gfs2_meta_inode_buffer(l_ip, &l_bh);
|
|
if (error)
|
|
goto out_m_bh;
|
|
|
|
spin_lock(&sdp->sd_statfs_spin);
|
|
gfs2_statfs_change_in(m_sc, m_bh->b_data +
|
|
sizeof(struct gfs2_dinode));
|
|
gfs2_statfs_change_in(l_sc, l_bh->b_data +
|
|
sizeof(struct gfs2_dinode));
|
|
spin_unlock(&sdp->sd_statfs_spin);
|
|
|
|
brelse(l_bh);
|
|
}
|
|
|
|
out_m_bh:
|
|
brelse(m_bh);
|
|
out:
|
|
gfs2_glock_dq_uninit(&gh);
|
|
return 0;
|
|
}
|
|
|
|
void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
|
|
s64 dinodes)
|
|
{
|
|
struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
|
|
struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
|
|
struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
|
|
struct buffer_head *l_bh;
|
|
s64 x, y;
|
|
int need_sync = 0;
|
|
int error;
|
|
|
|
error = gfs2_meta_inode_buffer(l_ip, &l_bh);
|
|
if (error)
|
|
return;
|
|
|
|
gfs2_trans_add_meta(l_ip->i_gl, l_bh);
|
|
|
|
spin_lock(&sdp->sd_statfs_spin);
|
|
l_sc->sc_total += total;
|
|
l_sc->sc_free += free;
|
|
l_sc->sc_dinodes += dinodes;
|
|
gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
|
|
if (sdp->sd_args.ar_statfs_percent) {
|
|
x = 100 * l_sc->sc_free;
|
|
y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
|
|
if (x >= y || x <= -y)
|
|
need_sync = 1;
|
|
}
|
|
spin_unlock(&sdp->sd_statfs_spin);
|
|
|
|
brelse(l_bh);
|
|
if (need_sync)
|
|
gfs2_wake_up_statfs(sdp);
|
|
}
|
|
|
|
void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
|
|
struct buffer_head *l_bh)
|
|
{
|
|
struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
|
|
struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
|
|
struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
|
|
struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
|
|
|
|
gfs2_trans_add_meta(l_ip->i_gl, l_bh);
|
|
gfs2_trans_add_meta(m_ip->i_gl, m_bh);
|
|
|
|
spin_lock(&sdp->sd_statfs_spin);
|
|
m_sc->sc_total += l_sc->sc_total;
|
|
m_sc->sc_free += l_sc->sc_free;
|
|
m_sc->sc_dinodes += l_sc->sc_dinodes;
|
|
memset(l_sc, 0, sizeof(struct gfs2_statfs_change));
|
|
memset(l_bh->b_data + sizeof(struct gfs2_dinode),
|
|
0, sizeof(struct gfs2_statfs_change));
|
|
gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
|
|
spin_unlock(&sdp->sd_statfs_spin);
|
|
}
|
|
|
|
int gfs2_statfs_sync(struct super_block *sb, int type)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
|
|
struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
|
|
struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
|
|
struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
|
|
struct gfs2_holder gh;
|
|
struct buffer_head *m_bh, *l_bh;
|
|
int error;
|
|
|
|
sb_start_write(sb);
|
|
error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
|
|
&gh);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = gfs2_meta_inode_buffer(m_ip, &m_bh);
|
|
if (error)
|
|
goto out_unlock;
|
|
|
|
spin_lock(&sdp->sd_statfs_spin);
|
|
gfs2_statfs_change_in(m_sc, m_bh->b_data +
|
|
sizeof(struct gfs2_dinode));
|
|
if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) {
|
|
spin_unlock(&sdp->sd_statfs_spin);
|
|
goto out_bh;
|
|
}
|
|
spin_unlock(&sdp->sd_statfs_spin);
|
|
|
|
error = gfs2_meta_inode_buffer(l_ip, &l_bh);
|
|
if (error)
|
|
goto out_bh;
|
|
|
|
error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
|
|
if (error)
|
|
goto out_bh2;
|
|
|
|
update_statfs(sdp, m_bh, l_bh);
|
|
sdp->sd_statfs_force_sync = 0;
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
out_bh2:
|
|
brelse(l_bh);
|
|
out_bh:
|
|
brelse(m_bh);
|
|
out_unlock:
|
|
gfs2_glock_dq_uninit(&gh);
|
|
out:
|
|
sb_end_write(sb);
|
|
return error;
|
|
}
|
|
|
|
struct lfcc {
|
|
struct list_head list;
|
|
struct gfs2_holder gh;
|
|
};
|
|
|
|
/**
|
|
* gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all
|
|
* journals are clean
|
|
* @sdp: the file system
|
|
* @state: the state to put the transaction lock into
|
|
* @t_gh: the hold on the transaction lock
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
|
|
struct gfs2_holder *freeze_gh)
|
|
{
|
|
struct gfs2_inode *ip;
|
|
struct gfs2_jdesc *jd;
|
|
struct lfcc *lfcc;
|
|
LIST_HEAD(list);
|
|
struct gfs2_log_header_host lh;
|
|
int error;
|
|
|
|
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
|
|
lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
|
|
if (!lfcc) {
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
ip = GFS2_I(jd->jd_inode);
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh);
|
|
if (error) {
|
|
kfree(lfcc);
|
|
goto out;
|
|
}
|
|
list_add(&lfcc->list, &list);
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
|
|
GL_NOCACHE, freeze_gh);
|
|
|
|
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
|
|
error = gfs2_jdesc_check(jd);
|
|
if (error)
|
|
break;
|
|
error = gfs2_find_jhead(jd, &lh);
|
|
if (error)
|
|
break;
|
|
if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
|
|
error = -EBUSY;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (error)
|
|
gfs2_glock_dq_uninit(freeze_gh);
|
|
|
|
out:
|
|
while (!list_empty(&list)) {
|
|
lfcc = list_entry(list.next, struct lfcc, list);
|
|
list_del(&lfcc->list);
|
|
gfs2_glock_dq_uninit(&lfcc->gh);
|
|
kfree(lfcc);
|
|
}
|
|
return error;
|
|
}
|
|
|
|
void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
|
|
{
|
|
struct gfs2_dinode *str = buf;
|
|
|
|
str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
|
|
str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
|
|
str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
|
|
str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
|
|
str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
|
|
str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
|
|
str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode));
|
|
str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode));
|
|
str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
|
|
str->di_size = cpu_to_be64(i_size_read(&ip->i_inode));
|
|
str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
|
|
str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
|
|
str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
|
|
str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
|
|
|
|
str->di_goal_meta = cpu_to_be64(ip->i_goal);
|
|
str->di_goal_data = cpu_to_be64(ip->i_goal);
|
|
str->di_generation = cpu_to_be64(ip->i_generation);
|
|
|
|
str->di_flags = cpu_to_be32(ip->i_diskflags);
|
|
str->di_height = cpu_to_be16(ip->i_height);
|
|
str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
|
|
!(ip->i_diskflags & GFS2_DIF_EXHASH) ?
|
|
GFS2_FORMAT_DE : 0);
|
|
str->di_depth = cpu_to_be16(ip->i_depth);
|
|
str->di_entries = cpu_to_be32(ip->i_entries);
|
|
|
|
str->di_eattr = cpu_to_be64(ip->i_eattr);
|
|
str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
|
|
str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
|
|
str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
|
|
}
|
|
|
|
/**
|
|
* gfs2_write_inode - Make sure the inode is stable on the disk
|
|
* @inode: The inode
|
|
* @wbc: The writeback control structure
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(inode);
|
|
struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
|
|
struct backing_dev_info *bdi = inode_to_bdi(metamapping->host);
|
|
int ret = 0;
|
|
bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip));
|
|
|
|
if (flush_all)
|
|
gfs2_log_flush(GFS2_SB(inode), ip->i_gl,
|
|
GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_WRITE_INODE);
|
|
if (bdi->wb.dirty_exceeded)
|
|
gfs2_ail1_flush(sdp, wbc);
|
|
else
|
|
filemap_fdatawrite(metamapping);
|
|
if (flush_all)
|
|
ret = filemap_fdatawait(metamapping);
|
|
if (ret)
|
|
mark_inode_dirty_sync(inode);
|
|
else {
|
|
spin_lock(&inode->i_lock);
|
|
if (!(inode->i_flags & I_DIRTY))
|
|
gfs2_ordered_del_inode(ip);
|
|
spin_unlock(&inode->i_lock);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gfs2_dirty_inode - check for atime updates
|
|
* @inode: The inode in question
|
|
* @flags: The type of dirty
|
|
*
|
|
* Unfortunately it can be called under any combination of inode
|
|
* glock and transaction lock, so we have to check carefully.
|
|
*
|
|
* At the moment this deals only with atime - it should be possible
|
|
* to expand that role in future, once a review of the locking has
|
|
* been carried out.
|
|
*/
|
|
|
|
static void gfs2_dirty_inode(struct inode *inode, int flags)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(inode);
|
|
struct buffer_head *bh;
|
|
struct gfs2_holder gh;
|
|
int need_unlock = 0;
|
|
int need_endtrans = 0;
|
|
int ret;
|
|
|
|
if (!(flags & I_DIRTY_INODE))
|
|
return;
|
|
if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
|
|
return;
|
|
if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
|
|
ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
|
|
if (ret) {
|
|
fs_err(sdp, "dirty_inode: glock %d\n", ret);
|
|
return;
|
|
}
|
|
need_unlock = 1;
|
|
} else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
|
|
return;
|
|
|
|
if (current->journal_info == NULL) {
|
|
ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
|
|
if (ret) {
|
|
fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret);
|
|
goto out;
|
|
}
|
|
need_endtrans = 1;
|
|
}
|
|
|
|
ret = gfs2_meta_inode_buffer(ip, &bh);
|
|
if (ret == 0) {
|
|
gfs2_trans_add_meta(ip->i_gl, bh);
|
|
gfs2_dinode_out(ip, bh->b_data);
|
|
brelse(bh);
|
|
}
|
|
|
|
if (need_endtrans)
|
|
gfs2_trans_end(sdp);
|
|
out:
|
|
if (need_unlock)
|
|
gfs2_glock_dq_uninit(&gh);
|
|
}
|
|
|
|
/**
|
|
* gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
|
|
* @sdp: the filesystem
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_holder freeze_gh;
|
|
int error;
|
|
|
|
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE,
|
|
&freeze_gh);
|
|
if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
|
|
return error;
|
|
|
|
flush_workqueue(gfs2_delete_workqueue);
|
|
kthread_stop(sdp->sd_quotad_process);
|
|
kthread_stop(sdp->sd_logd_process);
|
|
|
|
gfs2_quota_sync(sdp->sd_vfs, 0);
|
|
gfs2_statfs_sync(sdp->sd_vfs, 0);
|
|
|
|
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
|
|
GFS2_LFC_MAKE_FS_RO);
|
|
wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0);
|
|
gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks);
|
|
|
|
if (gfs2_holder_initialized(&freeze_gh))
|
|
gfs2_glock_dq_uninit(&freeze_gh);
|
|
|
|
gfs2_quota_cleanup(sdp);
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_put_super - Unmount the filesystem
|
|
* @sb: The VFS superblock
|
|
*
|
|
*/
|
|
|
|
static void gfs2_put_super(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
int error;
|
|
struct gfs2_jdesc *jd;
|
|
|
|
/* No more recovery requests */
|
|
set_bit(SDF_NORECOVERY, &sdp->sd_flags);
|
|
smp_mb();
|
|
|
|
/* Wait on outstanding recovery */
|
|
restart:
|
|
spin_lock(&sdp->sd_jindex_spin);
|
|
list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
|
|
if (!test_bit(JDF_RECOVERY, &jd->jd_flags))
|
|
continue;
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
wait_on_bit(&jd->jd_flags, JDF_RECOVERY,
|
|
TASK_UNINTERRUPTIBLE);
|
|
goto restart;
|
|
}
|
|
spin_unlock(&sdp->sd_jindex_spin);
|
|
|
|
if (!sb_rdonly(sb)) {
|
|
error = gfs2_make_fs_ro(sdp);
|
|
if (error)
|
|
gfs2_io_error(sdp);
|
|
}
|
|
/* At this point, we're through modifying the disk */
|
|
|
|
/* Release stuff */
|
|
|
|
iput(sdp->sd_jindex);
|
|
iput(sdp->sd_statfs_inode);
|
|
iput(sdp->sd_rindex);
|
|
iput(sdp->sd_quota_inode);
|
|
|
|
gfs2_glock_put(sdp->sd_rename_gl);
|
|
gfs2_glock_put(sdp->sd_freeze_gl);
|
|
|
|
if (!sdp->sd_args.ar_spectator) {
|
|
gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
|
|
gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
|
|
iput(sdp->sd_sc_inode);
|
|
iput(sdp->sd_qc_inode);
|
|
}
|
|
|
|
gfs2_glock_dq_uninit(&sdp->sd_live_gh);
|
|
gfs2_clear_rgrpd(sdp);
|
|
gfs2_jindex_free(sdp);
|
|
/* Take apart glock structures and buffer lists */
|
|
gfs2_gl_hash_clear(sdp);
|
|
gfs2_delete_debugfs_file(sdp);
|
|
/* Unmount the locking protocol */
|
|
gfs2_lm_unmount(sdp);
|
|
|
|
/* At this point, we're through participating in the lockspace */
|
|
gfs2_sys_fs_del(sdp);
|
|
}
|
|
|
|
/**
|
|
* gfs2_sync_fs - sync the filesystem
|
|
* @sb: the superblock
|
|
*
|
|
* Flushes the log to disk.
|
|
*/
|
|
|
|
static int gfs2_sync_fs(struct super_block *sb, int wait)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
|
|
gfs2_quota_sync(sb, -1);
|
|
if (wait)
|
|
gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_SYNC_FS);
|
|
return sdp->sd_log_error;
|
|
}
|
|
|
|
void gfs2_freeze_func(struct work_struct *work)
|
|
{
|
|
int error;
|
|
struct gfs2_holder freeze_gh;
|
|
struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work);
|
|
struct super_block *sb = sdp->sd_vfs;
|
|
|
|
atomic_inc(&sb->s_active);
|
|
error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
|
|
&freeze_gh);
|
|
if (error) {
|
|
printk(KERN_INFO "GFS2: couldn't get freeze lock : %d\n", error);
|
|
gfs2_assert_withdraw(sdp, 0);
|
|
}
|
|
else {
|
|
atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
|
|
error = thaw_super(sb);
|
|
if (error) {
|
|
printk(KERN_INFO "GFS2: couldn't thaw filesystem: %d\n",
|
|
error);
|
|
gfs2_assert_withdraw(sdp, 0);
|
|
}
|
|
if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
|
|
freeze_gh.gh_flags |= GL_NOCACHE;
|
|
gfs2_glock_dq_uninit(&freeze_gh);
|
|
}
|
|
deactivate_super(sb);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* gfs2_freeze - prevent further writes to the filesystem
|
|
* @sb: the VFS structure for the filesystem
|
|
*
|
|
*/
|
|
|
|
static int gfs2_freeze(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
int error = 0;
|
|
|
|
mutex_lock(&sdp->sd_freeze_mutex);
|
|
if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN)
|
|
goto out;
|
|
|
|
if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
for (;;) {
|
|
error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
|
|
if (!error)
|
|
break;
|
|
|
|
switch (error) {
|
|
case -EBUSY:
|
|
fs_err(sdp, "waiting for recovery before freeze\n");
|
|
break;
|
|
|
|
default:
|
|
fs_err(sdp, "error freezing FS: %d\n", error);
|
|
break;
|
|
}
|
|
|
|
fs_err(sdp, "retrying...\n");
|
|
msleep(1000);
|
|
}
|
|
error = 0;
|
|
out:
|
|
mutex_unlock(&sdp->sd_freeze_mutex);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_unfreeze - reallow writes to the filesystem
|
|
* @sb: the VFS structure for the filesystem
|
|
*
|
|
*/
|
|
|
|
static int gfs2_unfreeze(struct super_block *sb)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
|
|
mutex_lock(&sdp->sd_freeze_mutex);
|
|
if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN ||
|
|
!gfs2_holder_initialized(&sdp->sd_freeze_gh)) {
|
|
mutex_unlock(&sdp->sd_freeze_mutex);
|
|
return 0;
|
|
}
|
|
|
|
gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
|
|
mutex_unlock(&sdp->sd_freeze_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* statfs_fill - fill in the sg for a given RG
|
|
* @rgd: the RG
|
|
* @sc: the sc structure
|
|
*
|
|
* Returns: 0 on success, -ESTALE if the LVB is invalid
|
|
*/
|
|
|
|
static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
|
|
struct gfs2_statfs_change_host *sc)
|
|
{
|
|
gfs2_rgrp_verify(rgd);
|
|
sc->sc_total += rgd->rd_data;
|
|
sc->sc_free += rgd->rd_free;
|
|
sc->sc_dinodes += rgd->rd_dinodes;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_statfs_slow - Stat a filesystem using asynchronous locking
|
|
* @sdp: the filesystem
|
|
* @sc: the sc info that will be returned
|
|
*
|
|
* Any error (other than a signal) will cause this routine to fall back
|
|
* to the synchronous version.
|
|
*
|
|
* FIXME: This really shouldn't busy wait like this.
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
|
|
{
|
|
struct gfs2_rgrpd *rgd_next;
|
|
struct gfs2_holder *gha, *gh;
|
|
unsigned int slots = 64;
|
|
unsigned int x;
|
|
int done;
|
|
int error = 0, err;
|
|
|
|
memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
|
|
gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
|
|
if (!gha)
|
|
return -ENOMEM;
|
|
for (x = 0; x < slots; x++)
|
|
gfs2_holder_mark_uninitialized(gha + x);
|
|
|
|
rgd_next = gfs2_rgrpd_get_first(sdp);
|
|
|
|
for (;;) {
|
|
done = 1;
|
|
|
|
for (x = 0; x < slots; x++) {
|
|
gh = gha + x;
|
|
|
|
if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) {
|
|
err = gfs2_glock_wait(gh);
|
|
if (err) {
|
|
gfs2_holder_uninit(gh);
|
|
error = err;
|
|
} else {
|
|
if (!error) {
|
|
struct gfs2_rgrpd *rgd =
|
|
gfs2_glock2rgrp(gh->gh_gl);
|
|
|
|
error = statfs_slow_fill(rgd, sc);
|
|
}
|
|
gfs2_glock_dq_uninit(gh);
|
|
}
|
|
}
|
|
|
|
if (gfs2_holder_initialized(gh))
|
|
done = 0;
|
|
else if (rgd_next && !error) {
|
|
error = gfs2_glock_nq_init(rgd_next->rd_gl,
|
|
LM_ST_SHARED,
|
|
GL_ASYNC,
|
|
gh);
|
|
rgd_next = gfs2_rgrpd_get_next(rgd_next);
|
|
done = 0;
|
|
}
|
|
|
|
if (signal_pending(current))
|
|
error = -ERESTARTSYS;
|
|
}
|
|
|
|
if (done)
|
|
break;
|
|
|
|
yield();
|
|
}
|
|
|
|
kfree(gha);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_statfs_i - Do a statfs
|
|
* @sdp: the filesystem
|
|
* @sg: the sg structure
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
|
|
{
|
|
struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
|
|
struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
|
|
|
|
spin_lock(&sdp->sd_statfs_spin);
|
|
|
|
*sc = *m_sc;
|
|
sc->sc_total += l_sc->sc_total;
|
|
sc->sc_free += l_sc->sc_free;
|
|
sc->sc_dinodes += l_sc->sc_dinodes;
|
|
|
|
spin_unlock(&sdp->sd_statfs_spin);
|
|
|
|
if (sc->sc_free < 0)
|
|
sc->sc_free = 0;
|
|
if (sc->sc_free > sc->sc_total)
|
|
sc->sc_free = sc->sc_total;
|
|
if (sc->sc_dinodes < 0)
|
|
sc->sc_dinodes = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_statfs - Gather and return stats about the filesystem
|
|
* @sb: The superblock
|
|
* @statfsbuf: The buffer
|
|
*
|
|
* Returns: 0 on success or error code
|
|
*/
|
|
|
|
static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
{
|
|
struct super_block *sb = dentry->d_sb;
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct gfs2_statfs_change_host sc;
|
|
int error;
|
|
|
|
error = gfs2_rindex_update(sdp);
|
|
if (error)
|
|
return error;
|
|
|
|
if (gfs2_tune_get(sdp, gt_statfs_slow))
|
|
error = gfs2_statfs_slow(sdp, &sc);
|
|
else
|
|
error = gfs2_statfs_i(sdp, &sc);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
buf->f_type = GFS2_MAGIC;
|
|
buf->f_bsize = sdp->sd_sb.sb_bsize;
|
|
buf->f_blocks = sc.sc_total;
|
|
buf->f_bfree = sc.sc_free;
|
|
buf->f_bavail = sc.sc_free;
|
|
buf->f_files = sc.sc_dinodes + sc.sc_free;
|
|
buf->f_ffree = sc.sc_free;
|
|
buf->f_namelen = GFS2_FNAMESIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_remount_fs - called when the FS is remounted
|
|
* @sb: the filesystem
|
|
* @flags: the remount flags
|
|
* @data: extra data passed in (not used right now)
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
|
|
{
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct gfs2_args args = sdp->sd_args; /* Default to current settings */
|
|
struct gfs2_tune *gt = &sdp->sd_tune;
|
|
int error;
|
|
|
|
sync_filesystem(sb);
|
|
|
|
spin_lock(>->gt_spin);
|
|
args.ar_commit = gt->gt_logd_secs;
|
|
args.ar_quota_quantum = gt->gt_quota_quantum;
|
|
if (gt->gt_statfs_slow)
|
|
args.ar_statfs_quantum = 0;
|
|
else
|
|
args.ar_statfs_quantum = gt->gt_statfs_quantum;
|
|
spin_unlock(>->gt_spin);
|
|
error = gfs2_mount_args(&args, data);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Not allowed to change locking details */
|
|
if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) ||
|
|
strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) ||
|
|
strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata))
|
|
return -EINVAL;
|
|
|
|
/* Some flags must not be changed */
|
|
if (args_neq(&args, &sdp->sd_args, spectator) ||
|
|
args_neq(&args, &sdp->sd_args, localflocks) ||
|
|
args_neq(&args, &sdp->sd_args, meta))
|
|
return -EINVAL;
|
|
|
|
if (sdp->sd_args.ar_spectator)
|
|
*flags |= SB_RDONLY;
|
|
|
|
if ((sb->s_flags ^ *flags) & SB_RDONLY) {
|
|
if (*flags & SB_RDONLY)
|
|
error = gfs2_make_fs_ro(sdp);
|
|
else
|
|
error = gfs2_make_fs_rw(sdp);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
sdp->sd_args = args;
|
|
if (sdp->sd_args.ar_posix_acl)
|
|
sb->s_flags |= SB_POSIXACL;
|
|
else
|
|
sb->s_flags &= ~SB_POSIXACL;
|
|
if (sdp->sd_args.ar_nobarrier)
|
|
set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
|
|
else
|
|
clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
|
|
spin_lock(>->gt_spin);
|
|
gt->gt_logd_secs = args.ar_commit;
|
|
gt->gt_quota_quantum = args.ar_quota_quantum;
|
|
if (args.ar_statfs_quantum) {
|
|
gt->gt_statfs_slow = 0;
|
|
gt->gt_statfs_quantum = args.ar_statfs_quantum;
|
|
}
|
|
else {
|
|
gt->gt_statfs_slow = 1;
|
|
gt->gt_statfs_quantum = 30;
|
|
}
|
|
spin_unlock(>->gt_spin);
|
|
|
|
gfs2_online_uevent(sdp);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_drop_inode - Drop an inode (test for remote unlink)
|
|
* @inode: The inode to drop
|
|
*
|
|
* If we've received a callback on an iopen lock then it's because a
|
|
* remote node tried to deallocate the inode but failed due to this node
|
|
* still having the inode open. Here we mark the link count zero
|
|
* since we know that it must have reached zero if the GLF_DEMOTE flag
|
|
* is set on the iopen glock. If we didn't do a disk read since the
|
|
* remote node removed the final link then we might otherwise miss
|
|
* this event. This check ensures that this node will deallocate the
|
|
* inode's blocks, or alternatively pass the baton on to another
|
|
* node for later deallocation.
|
|
*/
|
|
|
|
static int gfs2_drop_inode(struct inode *inode)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
|
|
if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) &&
|
|
inode->i_nlink &&
|
|
gfs2_holder_initialized(&ip->i_iopen_gh)) {
|
|
struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
|
|
if (test_bit(GLF_DEMOTE, &gl->gl_flags))
|
|
clear_nlink(inode);
|
|
}
|
|
|
|
/*
|
|
* When under memory pressure when an inode's link count has dropped to
|
|
* zero, defer deleting the inode to the delete workqueue. This avoids
|
|
* calling into DLM under memory pressure, which can deadlock.
|
|
*/
|
|
if (!inode->i_nlink &&
|
|
unlikely(current->flags & PF_MEMALLOC) &&
|
|
gfs2_holder_initialized(&ip->i_iopen_gh)) {
|
|
struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
|
|
|
|
gfs2_glock_hold(gl);
|
|
if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
|
|
gfs2_glock_queue_put(gl);
|
|
return false;
|
|
}
|
|
|
|
return generic_drop_inode(inode);
|
|
}
|
|
|
|
static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
|
|
{
|
|
do {
|
|
if (d1 == d2)
|
|
return 1;
|
|
d1 = d1->d_parent;
|
|
} while (!IS_ROOT(d1));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_show_options - Show mount options for /proc/mounts
|
|
* @s: seq_file structure
|
|
* @root: root of this (sub)tree
|
|
*
|
|
* Returns: 0 on success or error code
|
|
*/
|
|
|
|
static int gfs2_show_options(struct seq_file *s, struct dentry *root)
|
|
{
|
|
struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
|
|
struct gfs2_args *args = &sdp->sd_args;
|
|
int val;
|
|
|
|
if (is_ancestor(root, sdp->sd_master_dir))
|
|
seq_puts(s, ",meta");
|
|
if (args->ar_lockproto[0])
|
|
seq_show_option(s, "lockproto", args->ar_lockproto);
|
|
if (args->ar_locktable[0])
|
|
seq_show_option(s, "locktable", args->ar_locktable);
|
|
if (args->ar_hostdata[0])
|
|
seq_show_option(s, "hostdata", args->ar_hostdata);
|
|
if (args->ar_spectator)
|
|
seq_puts(s, ",spectator");
|
|
if (args->ar_localflocks)
|
|
seq_puts(s, ",localflocks");
|
|
if (args->ar_debug)
|
|
seq_puts(s, ",debug");
|
|
if (args->ar_posix_acl)
|
|
seq_puts(s, ",acl");
|
|
if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
|
|
char *state;
|
|
switch (args->ar_quota) {
|
|
case GFS2_QUOTA_OFF:
|
|
state = "off";
|
|
break;
|
|
case GFS2_QUOTA_ACCOUNT:
|
|
state = "account";
|
|
break;
|
|
case GFS2_QUOTA_ON:
|
|
state = "on";
|
|
break;
|
|
default:
|
|
state = "unknown";
|
|
break;
|
|
}
|
|
seq_printf(s, ",quota=%s", state);
|
|
}
|
|
if (args->ar_suiddir)
|
|
seq_puts(s, ",suiddir");
|
|
if (args->ar_data != GFS2_DATA_DEFAULT) {
|
|
char *state;
|
|
switch (args->ar_data) {
|
|
case GFS2_DATA_WRITEBACK:
|
|
state = "writeback";
|
|
break;
|
|
case GFS2_DATA_ORDERED:
|
|
state = "ordered";
|
|
break;
|
|
default:
|
|
state = "unknown";
|
|
break;
|
|
}
|
|
seq_printf(s, ",data=%s", state);
|
|
}
|
|
if (args->ar_discard)
|
|
seq_puts(s, ",discard");
|
|
val = sdp->sd_tune.gt_logd_secs;
|
|
if (val != 30)
|
|
seq_printf(s, ",commit=%d", val);
|
|
val = sdp->sd_tune.gt_statfs_quantum;
|
|
if (val != 30)
|
|
seq_printf(s, ",statfs_quantum=%d", val);
|
|
else if (sdp->sd_tune.gt_statfs_slow)
|
|
seq_puts(s, ",statfs_quantum=0");
|
|
val = sdp->sd_tune.gt_quota_quantum;
|
|
if (val != 60)
|
|
seq_printf(s, ",quota_quantum=%d", val);
|
|
if (args->ar_statfs_percent)
|
|
seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
|
|
if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
|
|
const char *state;
|
|
|
|
switch (args->ar_errors) {
|
|
case GFS2_ERRORS_WITHDRAW:
|
|
state = "withdraw";
|
|
break;
|
|
case GFS2_ERRORS_PANIC:
|
|
state = "panic";
|
|
break;
|
|
default:
|
|
state = "unknown";
|
|
break;
|
|
}
|
|
seq_printf(s, ",errors=%s", state);
|
|
}
|
|
if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
|
|
seq_puts(s, ",nobarrier");
|
|
if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
|
|
seq_puts(s, ",demote_interface_used");
|
|
if (args->ar_rgrplvb)
|
|
seq_puts(s, ",rgrplvb");
|
|
if (args->ar_loccookie)
|
|
seq_puts(s, ",loccookie");
|
|
return 0;
|
|
}
|
|
|
|
static void gfs2_final_release_pages(struct gfs2_inode *ip)
|
|
{
|
|
struct inode *inode = &ip->i_inode;
|
|
struct gfs2_glock *gl = ip->i_gl;
|
|
|
|
truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0);
|
|
truncate_inode_pages(&inode->i_data, 0);
|
|
|
|
if (atomic_read(&gl->gl_revokes) == 0) {
|
|
clear_bit(GLF_LFLUSH, &gl->gl_flags);
|
|
clear_bit(GLF_DIRTY, &gl->gl_flags);
|
|
}
|
|
}
|
|
|
|
static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_rgrpd *rgd;
|
|
struct gfs2_holder gh;
|
|
int error;
|
|
|
|
if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
error = gfs2_rindex_update(sdp);
|
|
if (error)
|
|
return error;
|
|
|
|
error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
|
|
if (error)
|
|
return error;
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
|
|
if (!rgd) {
|
|
gfs2_consist_inode(ip);
|
|
error = -EIO;
|
|
goto out_qs;
|
|
}
|
|
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
|
|
if (error)
|
|
goto out_qs;
|
|
|
|
error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
|
|
sdp->sd_jdesc->jd_blocks);
|
|
if (error)
|
|
goto out_rg_gunlock;
|
|
|
|
gfs2_free_di(rgd, ip);
|
|
|
|
gfs2_final_release_pages(ip);
|
|
|
|
gfs2_trans_end(sdp);
|
|
|
|
out_rg_gunlock:
|
|
gfs2_glock_dq_uninit(&gh);
|
|
out_qs:
|
|
gfs2_quota_unhold(ip);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_glock_put_eventually
|
|
* @gl: The glock to put
|
|
*
|
|
* When under memory pressure, trigger a deferred glock put to make sure we
|
|
* won't call into DLM and deadlock. Otherwise, put the glock directly.
|
|
*/
|
|
|
|
static void gfs2_glock_put_eventually(struct gfs2_glock *gl)
|
|
{
|
|
if (current->flags & PF_MEMALLOC)
|
|
gfs2_glock_queue_put(gl);
|
|
else
|
|
gfs2_glock_put(gl);
|
|
}
|
|
|
|
/**
|
|
* gfs2_evict_inode - Remove an inode from cache
|
|
* @inode: The inode to evict
|
|
*
|
|
* There are three cases to consider:
|
|
* 1. i_nlink == 0, we are final opener (and must deallocate)
|
|
* 2. i_nlink == 0, we are not the final opener (and cannot deallocate)
|
|
* 3. i_nlink > 0
|
|
*
|
|
* If the fs is read only, then we have to treat all cases as per #3
|
|
* since we are unable to do any deallocation. The inode will be
|
|
* deallocated by the next read/write node to attempt an allocation
|
|
* in the same resource group
|
|
*
|
|
* We have to (at the moment) hold the inodes main lock to cover
|
|
* the gap between unlocking the shared lock on the iopen lock and
|
|
* taking the exclusive lock. I'd rather do a shared -> exclusive
|
|
* conversion on the iopen lock, but we can change that later. This
|
|
* is safe, just less efficient.
|
|
*/
|
|
|
|
static void gfs2_evict_inode(struct inode *inode)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct gfs2_sbd *sdp = sb->s_fs_info;
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_holder gh;
|
|
struct address_space *metamapping;
|
|
int error;
|
|
|
|
if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) {
|
|
clear_inode(inode);
|
|
return;
|
|
}
|
|
|
|
if (inode->i_nlink || sb_rdonly(sb))
|
|
goto out;
|
|
|
|
if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) {
|
|
BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));
|
|
gfs2_holder_mark_uninitialized(&gh);
|
|
goto alloc_failed;
|
|
}
|
|
|
|
/* Deletes should never happen under memory pressure anymore. */
|
|
if (WARN_ON_ONCE(current->flags & PF_MEMALLOC))
|
|
goto out;
|
|
|
|
/* Must not read inode block until block type has been verified */
|
|
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
|
|
if (unlikely(error)) {
|
|
glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
|
|
ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
|
|
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
|
|
goto out;
|
|
}
|
|
|
|
error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
|
|
if (error)
|
|
goto out_truncate;
|
|
|
|
if (test_bit(GIF_INVALID, &ip->i_flags)) {
|
|
error = gfs2_inode_refresh(ip);
|
|
if (error)
|
|
goto out_truncate;
|
|
}
|
|
|
|
/*
|
|
* The inode may have been recreated in the meantime.
|
|
*/
|
|
if (inode->i_nlink)
|
|
goto out_truncate;
|
|
|
|
alloc_failed:
|
|
if (gfs2_holder_initialized(&ip->i_iopen_gh) &&
|
|
test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
|
|
ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
|
|
gfs2_glock_dq_wait(&ip->i_iopen_gh);
|
|
gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE,
|
|
&ip->i_iopen_gh);
|
|
error = gfs2_glock_nq(&ip->i_iopen_gh);
|
|
if (error)
|
|
goto out_truncate;
|
|
}
|
|
|
|
/* Case 1 starts here */
|
|
|
|
if (S_ISDIR(inode->i_mode) &&
|
|
(ip->i_diskflags & GFS2_DIF_EXHASH)) {
|
|
error = gfs2_dir_exhash_dealloc(ip);
|
|
if (error)
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (ip->i_eattr) {
|
|
error = gfs2_ea_dealloc(ip);
|
|
if (error)
|
|
goto out_unlock;
|
|
}
|
|
|
|
if (!gfs2_is_stuffed(ip)) {
|
|
error = gfs2_file_dealloc(ip);
|
|
if (error)
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* We're about to clear the bitmap for the dinode, but as soon as we
|
|
do, gfs2_create_inode can create another inode at the same block
|
|
location and try to set gl_object again. We clear gl_object here so
|
|
that subsequent inode creates don't see an old gl_object. */
|
|
glock_clear_object(ip->i_gl, ip);
|
|
error = gfs2_dinode_dealloc(ip);
|
|
goto out_unlock;
|
|
|
|
out_truncate:
|
|
gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
|
|
GFS2_LFC_EVICT_INODE);
|
|
metamapping = gfs2_glock2aspace(ip->i_gl);
|
|
if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
|
|
filemap_fdatawrite(metamapping);
|
|
filemap_fdatawait(metamapping);
|
|
}
|
|
write_inode_now(inode, 1);
|
|
gfs2_ail_flush(ip->i_gl, 0);
|
|
|
|
/* Case 2 starts here */
|
|
error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
|
|
if (error)
|
|
goto out_unlock;
|
|
/* Needs to be done before glock release & also in a transaction */
|
|
truncate_inode_pages(&inode->i_data, 0);
|
|
truncate_inode_pages(metamapping, 0);
|
|
gfs2_trans_end(sdp);
|
|
|
|
out_unlock:
|
|
/* Error path for case 1 */
|
|
if (gfs2_rs_active(&ip->i_res))
|
|
gfs2_rs_deltree(&ip->i_res);
|
|
|
|
if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
|
|
glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
|
|
if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
|
|
ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
|
|
gfs2_glock_dq(&ip->i_iopen_gh);
|
|
}
|
|
gfs2_holder_uninit(&ip->i_iopen_gh);
|
|
}
|
|
if (gfs2_holder_initialized(&gh)) {
|
|
glock_clear_object(ip->i_gl, ip);
|
|
gfs2_glock_dq_uninit(&gh);
|
|
}
|
|
if (error && error != GLR_TRYFAILED && error != -EROFS)
|
|
fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
|
|
out:
|
|
/* Case 3 starts here */
|
|
truncate_inode_pages_final(&inode->i_data);
|
|
gfs2_rsqa_delete(ip, NULL);
|
|
gfs2_ordered_del_inode(ip);
|
|
clear_inode(inode);
|
|
gfs2_dir_hash_inval(ip);
|
|
glock_clear_object(ip->i_gl, ip);
|
|
wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE);
|
|
gfs2_glock_add_to_lru(ip->i_gl);
|
|
gfs2_glock_put_eventually(ip->i_gl);
|
|
ip->i_gl = NULL;
|
|
if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
|
|
struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
|
|
|
|
glock_clear_object(gl, ip);
|
|
ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
|
|
gfs2_glock_hold(gl);
|
|
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
|
|
gfs2_glock_put_eventually(gl);
|
|
}
|
|
}
|
|
|
|
static struct inode *gfs2_alloc_inode(struct super_block *sb)
|
|
{
|
|
struct gfs2_inode *ip;
|
|
|
|
ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
|
|
if (ip) {
|
|
ip->i_flags = 0;
|
|
ip->i_gl = NULL;
|
|
memset(&ip->i_res, 0, sizeof(ip->i_res));
|
|
RB_CLEAR_NODE(&ip->i_res.rs_node);
|
|
ip->i_rahead = 0;
|
|
}
|
|
return &ip->i_inode;
|
|
}
|
|
|
|
static void gfs2_i_callback(struct rcu_head *head)
|
|
{
|
|
struct inode *inode = container_of(head, struct inode, i_rcu);
|
|
kmem_cache_free(gfs2_inode_cachep, inode);
|
|
}
|
|
|
|
static void gfs2_destroy_inode(struct inode *inode)
|
|
{
|
|
call_rcu(&inode->i_rcu, gfs2_i_callback);
|
|
}
|
|
|
|
const struct super_operations gfs2_super_ops = {
|
|
.alloc_inode = gfs2_alloc_inode,
|
|
.destroy_inode = gfs2_destroy_inode,
|
|
.write_inode = gfs2_write_inode,
|
|
.dirty_inode = gfs2_dirty_inode,
|
|
.evict_inode = gfs2_evict_inode,
|
|
.put_super = gfs2_put_super,
|
|
.sync_fs = gfs2_sync_fs,
|
|
.freeze_super = gfs2_freeze,
|
|
.thaw_super = gfs2_unfreeze,
|
|
.statfs = gfs2_statfs,
|
|
.remount_fs = gfs2_remount_fs,
|
|
.drop_inode = gfs2_drop_inode,
|
|
.show_options = gfs2_show_options,
|
|
};
|
|
|