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super.c
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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* super.c
*
* load/unload driver, mount/dismount volumes
*
* Copyright (C) 2002, 2004 Oracle. All rights reserved.
*
* This program 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 of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/init.h>
#include <linux/random.h>
#include <linux/statfs.h>
#include <linux/moduleparam.h>
#include <linux/blkdev.h>
#include <linux/socket.h>
#include <linux/inet.h>
#include <linux/parser.h>
#include <linux/crc32.h>
#include <linux/debugfs.h>
#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/quotaops.h>
#include <linux/cleancache.h>
#define CREATE_TRACE_POINTS
#include "ocfs2_trace.h"
#include <cluster/masklog.h>
#include "ocfs2.h"
/* this should be the only file to include a version 1 header */
#include "ocfs1_fs_compat.h"
#include "alloc.h"
#include "aops.h"
#include "blockcheck.h"
#include "dlmglue.h"
#include "export.h"
#include "extent_map.h"
#include "heartbeat.h"
#include "inode.h"
#include "journal.h"
#include "localalloc.h"
#include "namei.h"
#include "slot_map.h"
#include "super.h"
#include "sysfile.h"
#include "uptodate.h"
#include "xattr.h"
#include "quota.h"
#include "refcounttree.h"
#include "suballoc.h"
#include "buffer_head_io.h"
static struct kmem_cache *ocfs2_inode_cachep;
struct kmem_cache *ocfs2_dquot_cachep;
struct kmem_cache *ocfs2_qf_chunk_cachep;
/* OCFS2 needs to schedule several different types of work which
* require cluster locking, disk I/O, recovery waits, etc. Since these
* types of work tend to be heavy we avoid using the kernel events
* workqueue and schedule on our own. */
struct workqueue_struct *ocfs2_wq = NULL;
static struct dentry *ocfs2_debugfs_root;
MODULE_AUTHOR("Oracle");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("OCFS2 cluster file system");
struct mount_options
{
unsigned long commit_interval;
unsigned long mount_opt;
unsigned int atime_quantum;
signed short slot;
int localalloc_opt;
unsigned int resv_level;
int dir_resv_level;
char cluster_stack[OCFS2_STACK_LABEL_LEN + 1];
};
static int ocfs2_parse_options(struct super_block *sb, char *options,
struct mount_options *mopt,
int is_remount);
static int ocfs2_check_set_options(struct super_block *sb,
struct mount_options *options);
static int ocfs2_show_options(struct seq_file *s, struct dentry *root);
static void ocfs2_put_super(struct super_block *sb);
static int ocfs2_mount_volume(struct super_block *sb);
static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err);
static int ocfs2_initialize_mem_caches(void);
static void ocfs2_free_mem_caches(void);
static void ocfs2_delete_osb(struct ocfs2_super *osb);
static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf);
static int ocfs2_sync_fs(struct super_block *sb, int wait);
static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb);
static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb);
static void ocfs2_release_system_inodes(struct ocfs2_super *osb);
static int ocfs2_check_volume(struct ocfs2_super *osb);
static int ocfs2_verify_volume(struct ocfs2_dinode *di,
struct buffer_head *bh,
u32 sectsize,
struct ocfs2_blockcheck_stats *stats);
static int ocfs2_initialize_super(struct super_block *sb,
struct buffer_head *bh,
int sector_size,
struct ocfs2_blockcheck_stats *stats);
static int ocfs2_get_sector(struct super_block *sb,
struct buffer_head **bh,
int block,
int sect_size);
static struct inode *ocfs2_alloc_inode(struct super_block *sb);
static void ocfs2_destroy_inode(struct inode *inode);
static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
static int ocfs2_enable_quotas(struct ocfs2_super *osb);
static void ocfs2_disable_quotas(struct ocfs2_super *osb);
static struct dquot **ocfs2_get_dquots(struct inode *inode)
{
return OCFS2_I(inode)->i_dquot;
}
static const struct super_operations ocfs2_sops = {
.statfs = ocfs2_statfs,
.alloc_inode = ocfs2_alloc_inode,
.destroy_inode = ocfs2_destroy_inode,
.drop_inode = ocfs2_drop_inode,
.evict_inode = ocfs2_evict_inode,
.sync_fs = ocfs2_sync_fs,
.put_super = ocfs2_put_super,
.remount_fs = ocfs2_remount,
.show_options = ocfs2_show_options,
.quota_read = ocfs2_quota_read,
.quota_write = ocfs2_quota_write,
.get_dquots = ocfs2_get_dquots,
};
enum {
Opt_barrier,
Opt_err_panic,
Opt_err_ro,
Opt_intr,
Opt_nointr,
Opt_hb_none,
Opt_hb_local,
Opt_hb_global,
Opt_data_ordered,
Opt_data_writeback,
Opt_atime_quantum,
Opt_slot,
Opt_commit,
Opt_localalloc,
Opt_localflocks,
Opt_stack,
Opt_user_xattr,
Opt_nouser_xattr,
Opt_inode64,
Opt_acl,
Opt_noacl,
Opt_usrquota,
Opt_grpquota,
Opt_coherency_buffered,
Opt_coherency_full,
Opt_resv_level,
Opt_dir_resv_level,
Opt_journal_async_commit,
Opt_err_cont,
Opt_err,
};
static const match_table_t tokens = {
{Opt_barrier, "barrier=%u"},
{Opt_err_panic, "errors=panic"},
{Opt_err_ro, "errors=remount-ro"},
{Opt_intr, "intr"},
{Opt_nointr, "nointr"},
{Opt_hb_none, OCFS2_HB_NONE},
{Opt_hb_local, OCFS2_HB_LOCAL},
{Opt_hb_global, OCFS2_HB_GLOBAL},
{Opt_data_ordered, "data=ordered"},
{Opt_data_writeback, "data=writeback"},
{Opt_atime_quantum, "atime_quantum=%u"},
{Opt_slot, "preferred_slot=%u"},
{Opt_commit, "commit=%u"},
{Opt_localalloc, "localalloc=%d"},
{Opt_localflocks, "localflocks"},
{Opt_stack, "cluster_stack=%s"},
{Opt_user_xattr, "user_xattr"},
{Opt_nouser_xattr, "nouser_xattr"},
{Opt_inode64, "inode64"},
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
{Opt_usrquota, "usrquota"},
{Opt_grpquota, "grpquota"},
{Opt_coherency_buffered, "coherency=buffered"},
{Opt_coherency_full, "coherency=full"},
{Opt_resv_level, "resv_level=%u"},
{Opt_dir_resv_level, "dir_resv_level=%u"},
{Opt_journal_async_commit, "journal_async_commit"},
{Opt_err_cont, "errors=continue"},
{Opt_err, NULL}
};
#ifdef CONFIG_DEBUG_FS
static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len)
{
struct ocfs2_cluster_connection *cconn = osb->cconn;
struct ocfs2_recovery_map *rm = osb->recovery_map;
struct ocfs2_orphan_scan *os = &osb->osb_orphan_scan;
int i, out = 0;
out += snprintf(buf + out, len - out,
"%10s => Id: %-s Uuid: %-s Gen: 0x%X Label: %-s\n",
"Device", osb->dev_str, osb->uuid_str,
osb->fs_generation, osb->vol_label);
out += snprintf(buf + out, len - out,
"%10s => State: %d Flags: 0x%lX\n", "Volume",
atomic_read(&osb->vol_state), osb->osb_flags);
out += snprintf(buf + out, len - out,
"%10s => Block: %lu Cluster: %d\n", "Sizes",
osb->sb->s_blocksize, osb->s_clustersize);
out += snprintf(buf + out, len - out,
"%10s => Compat: 0x%X Incompat: 0x%X "
"ROcompat: 0x%X\n",
"Features", osb->s_feature_compat,
osb->s_feature_incompat, osb->s_feature_ro_compat);
out += snprintf(buf + out, len - out,
"%10s => Opts: 0x%lX AtimeQuanta: %u\n", "Mount",
osb->s_mount_opt, osb->s_atime_quantum);
if (cconn) {
out += snprintf(buf + out, len - out,
"%10s => Stack: %s Name: %*s "
"Version: %d.%d\n", "Cluster",
(*osb->osb_cluster_stack == '\0' ?
"o2cb" : osb->osb_cluster_stack),
cconn->cc_namelen, cconn->cc_name,
cconn->cc_version.pv_major,
cconn->cc_version.pv_minor);
}
spin_lock(&osb->dc_task_lock);
out += snprintf(buf + out, len - out,
"%10s => Pid: %d Count: %lu WakeSeq: %lu "
"WorkSeq: %lu\n", "DownCnvt",
(osb->dc_task ? task_pid_nr(osb->dc_task) : -1),
osb->blocked_lock_count, osb->dc_wake_sequence,
osb->dc_work_sequence);
spin_unlock(&osb->dc_task_lock);
spin_lock(&osb->osb_lock);
out += snprintf(buf + out, len - out, "%10s => Pid: %d Nodes:",
"Recovery",
(osb->recovery_thread_task ?
task_pid_nr(osb->recovery_thread_task) : -1));
if (rm->rm_used == 0)
out += snprintf(buf + out, len - out, " None\n");
else {
for (i = 0; i < rm->rm_used; i++)
out += snprintf(buf + out, len - out, " %d",
rm->rm_entries[i]);
out += snprintf(buf + out, len - out, "\n");
}
spin_unlock(&osb->osb_lock);
out += snprintf(buf + out, len - out,
"%10s => Pid: %d Interval: %lu\n", "Commit",
(osb->commit_task ? task_pid_nr(osb->commit_task) : -1),
osb->osb_commit_interval);
out += snprintf(buf + out, len - out,
"%10s => State: %d TxnId: %lu NumTxns: %d\n",
"Journal", osb->journal->j_state,
osb->journal->j_trans_id,
atomic_read(&osb->journal->j_num_trans));
out += snprintf(buf + out, len - out,
"%10s => GlobalAllocs: %d LocalAllocs: %d "
"SubAllocs: %d LAWinMoves: %d SAExtends: %d\n",
"Stats",
atomic_read(&osb->alloc_stats.bitmap_data),
atomic_read(&osb->alloc_stats.local_data),
atomic_read(&osb->alloc_stats.bg_allocs),
atomic_read(&osb->alloc_stats.moves),
atomic_read(&osb->alloc_stats.bg_extends));
out += snprintf(buf + out, len - out,
"%10s => State: %u Descriptor: %llu Size: %u bits "
"Default: %u bits\n",
"LocalAlloc", osb->local_alloc_state,
(unsigned long long)osb->la_last_gd,
osb->local_alloc_bits, osb->local_alloc_default_bits);
spin_lock(&osb->osb_lock);
out += snprintf(buf + out, len - out,
"%10s => InodeSlot: %d StolenInodes: %d, "
"MetaSlot: %d StolenMeta: %d\n", "Steal",
osb->s_inode_steal_slot,
atomic_read(&osb->s_num_inodes_stolen),
osb->s_meta_steal_slot,
atomic_read(&osb->s_num_meta_stolen));
spin_unlock(&osb->osb_lock);
out += snprintf(buf + out, len - out, "OrphanScan => ");
out += snprintf(buf + out, len - out, "Local: %u Global: %u ",
os->os_count, os->os_seqno);
out += snprintf(buf + out, len - out, " Last Scan: ");
if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE)
out += snprintf(buf + out, len - out, "Disabled\n");
else
out += snprintf(buf + out, len - out, "%lu seconds ago\n",
(get_seconds() - os->os_scantime.tv_sec));
out += snprintf(buf + out, len - out, "%10s => %3s %10s\n",
"Slots", "Num", "RecoGen");
for (i = 0; i < osb->max_slots; ++i) {
out += snprintf(buf + out, len - out,
"%10s %c %3d %10d\n",
" ",
(i == osb->slot_num ? '*' : ' '),
i, osb->slot_recovery_generations[i]);
}
return out;
}
static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
{
struct ocfs2_super *osb = inode->i_private;
char *buf = NULL;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
goto bail;
i_size_write(inode, ocfs2_osb_dump(osb, buf, PAGE_SIZE));
file->private_data = buf;
return 0;
bail:
return -ENOMEM;
}
static int ocfs2_debug_release(struct inode *inode, struct file *file)
{
kfree(file->private_data);
return 0;
}
static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
size_t nbytes, loff_t *ppos)
{
return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
i_size_read(file->f_mapping->host));
}
#else
static int ocfs2_osb_debug_open(struct inode *inode, struct file *file)
{
return 0;
}
static int ocfs2_debug_release(struct inode *inode, struct file *file)
{
return 0;
}
static ssize_t ocfs2_debug_read(struct file *file, char __user *buf,
size_t nbytes, loff_t *ppos)
{
return 0;
}
#endif /* CONFIG_DEBUG_FS */
static const struct file_operations ocfs2_osb_debug_fops = {
.open = ocfs2_osb_debug_open,
.release = ocfs2_debug_release,
.read = ocfs2_debug_read,
.llseek = generic_file_llseek,
};
static int ocfs2_sync_fs(struct super_block *sb, int wait)
{
int status;
tid_t target;
struct ocfs2_super *osb = OCFS2_SB(sb);
if (ocfs2_is_hard_readonly(osb))
return -EROFS;
if (wait) {
status = ocfs2_flush_truncate_log(osb);
if (status < 0)
mlog_errno(status);
} else {
ocfs2_schedule_truncate_log_flush(osb, 0);
}
if (jbd2_journal_start_commit(OCFS2_SB(sb)->journal->j_journal,
&target)) {
if (wait)
jbd2_log_wait_commit(OCFS2_SB(sb)->journal->j_journal,
target);
}
return 0;
}
static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino)
{
if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA)
&& (ino == USER_QUOTA_SYSTEM_INODE
|| ino == LOCAL_USER_QUOTA_SYSTEM_INODE))
return 0;
if (!OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
&& (ino == GROUP_QUOTA_SYSTEM_INODE
|| ino == LOCAL_GROUP_QUOTA_SYSTEM_INODE))
return 0;
return 1;
}
static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb)
{
struct inode *new = NULL;
int status = 0;
int i;
new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
if (IS_ERR(new)) {
status = PTR_ERR(new);
mlog_errno(status);
goto bail;
}
osb->root_inode = new;
new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE, 0);
if (IS_ERR(new)) {
status = PTR_ERR(new);
mlog_errno(status);
goto bail;
}
osb->sys_root_inode = new;
for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE;
i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) {
if (!ocfs2_need_system_inode(osb, i))
continue;
new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
if (!new) {
ocfs2_release_system_inodes(osb);
status = -EINVAL;
mlog_errno(status);
/* FIXME: Should ERROR_RO_FS */
mlog(ML_ERROR, "Unable to load system inode %d, "
"possibly corrupt fs?", i);
goto bail;
}
// the array now has one ref, so drop this one
iput(new);
}
bail:
if (status)
mlog_errno(status);
return status;
}
static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb)
{
struct inode *new = NULL;
int status = 0;
int i;
for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1;
i < NUM_SYSTEM_INODES;
i++) {
if (!ocfs2_need_system_inode(osb, i))
continue;
new = ocfs2_get_system_file_inode(osb, i, osb->slot_num);
if (!new) {
ocfs2_release_system_inodes(osb);
status = -EINVAL;
mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n",
status, i, osb->slot_num);
goto bail;
}
/* the array now has one ref, so drop this one */
iput(new);
}
bail:
if (status)
mlog_errno(status);
return status;
}
static void ocfs2_release_system_inodes(struct ocfs2_super *osb)
{
int i;
struct inode *inode;
for (i = 0; i < NUM_GLOBAL_SYSTEM_INODES; i++) {
inode = osb->global_system_inodes[i];
if (inode) {
iput(inode);
osb->global_system_inodes[i] = NULL;
}
}
inode = osb->sys_root_inode;
if (inode) {
iput(inode);
osb->sys_root_inode = NULL;
}
inode = osb->root_inode;
if (inode) {
iput(inode);
osb->root_inode = NULL;
}
if (!osb->local_system_inodes)
return;
for (i = 0; i < NUM_LOCAL_SYSTEM_INODES * osb->max_slots; i++) {
if (osb->local_system_inodes[i]) {
iput(osb->local_system_inodes[i]);
osb->local_system_inodes[i] = NULL;
}
}
kfree(osb->local_system_inodes);
osb->local_system_inodes = NULL;
}
/* We're allocating fs objects, use GFP_NOFS */
static struct inode *ocfs2_alloc_inode(struct super_block *sb)
{
struct ocfs2_inode_info *oi;
oi = kmem_cache_alloc(ocfs2_inode_cachep, GFP_NOFS);
if (!oi)
return NULL;
oi->i_sync_tid = 0;
oi->i_datasync_tid = 0;
memset(&oi->i_dquot, 0, sizeof(oi->i_dquot));
jbd2_journal_init_jbd_inode(&oi->ip_jinode, &oi->vfs_inode);
return &oi->vfs_inode;
}
static void ocfs2_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
}
static void ocfs2_destroy_inode(struct inode *inode)
{
call_rcu(&inode->i_rcu, ocfs2_i_callback);
}
static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
unsigned int cbits)
{
unsigned int bytes = 1 << cbits;
unsigned int trim = bytes;
unsigned int bitshift = 32;
/*
* i_size and all block offsets in ocfs2 are always 64 bits
* wide. i_clusters is 32 bits, in cluster-sized units. So on
* 64 bit platforms, cluster size will be the limiting factor.
*/
#if BITS_PER_LONG == 32
# if defined(CONFIG_LBDAF)
BUILD_BUG_ON(sizeof(sector_t) != 8);
/*
* We might be limited by page cache size.
*/
if (bytes > PAGE_CACHE_SIZE) {
bytes = PAGE_CACHE_SIZE;
trim = 1;
/*
* Shift by 31 here so that we don't get larger than
* MAX_LFS_FILESIZE
*/
bitshift = 31;
}
# else
/*
* We are limited by the size of sector_t. Use block size, as
* that's what we expose to the VFS.
*/
bytes = 1 << bbits;
trim = 1;
bitshift = 31;
# endif
#endif
/*
* Trim by a whole cluster when we can actually approach the
* on-disk limits. Otherwise we can overflow i_clusters when
* an extent start is at the max offset.
*/
return (((unsigned long long)bytes) << bitshift) - trim;
}
static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
{
int incompat_features;
int ret = 0;
struct mount_options parsed_options;
struct ocfs2_super *osb = OCFS2_SB(sb);
u32 tmp;
sync_filesystem(sb);
if (!ocfs2_parse_options(sb, data, &parsed_options, 1) ||
!ocfs2_check_set_options(sb, &parsed_options)) {
ret = -EINVAL;
goto out;
}
tmp = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL |
OCFS2_MOUNT_HB_NONE;
if ((osb->s_mount_opt & tmp) != (parsed_options.mount_opt & tmp)) {
ret = -EINVAL;
mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
goto out;
}
if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
(parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ret = -EINVAL;
mlog(ML_ERROR, "Cannot change data mode on remount\n");
goto out;
}
/* Probably don't want this on remount; it might
* mess with other nodes */
if (!(osb->s_mount_opt & OCFS2_MOUNT_INODE64) &&
(parsed_options.mount_opt & OCFS2_MOUNT_INODE64)) {
ret = -EINVAL;
mlog(ML_ERROR, "Cannot enable inode64 on remount\n");
goto out;
}
/* We're going to/from readonly mode. */
if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) {
/* Disable quota accounting before remounting RO */
if (*flags & MS_RDONLY) {
ret = ocfs2_susp_quotas(osb, 0);
if (ret < 0)
goto out;
}
/* Lock here so the check of HARD_RO and the potential
* setting of SOFT_RO is atomic. */
spin_lock(&osb->osb_lock);
if (osb->osb_flags & OCFS2_OSB_HARD_RO) {
mlog(ML_ERROR, "Remount on readonly device is forbidden.\n");
ret = -EROFS;
goto unlock_osb;
}
if (*flags & MS_RDONLY) {
sb->s_flags |= MS_RDONLY;
osb->osb_flags |= OCFS2_OSB_SOFT_RO;
} else {
if (osb->osb_flags & OCFS2_OSB_ERROR_FS) {
mlog(ML_ERROR, "Cannot remount RDWR "
"filesystem due to previous errors.\n");
ret = -EROFS;
goto unlock_osb;
}
incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP);
if (incompat_features) {
mlog(ML_ERROR, "Cannot remount RDWR because "
"of unsupported optional features "
"(%x).\n", incompat_features);
ret = -EINVAL;
goto unlock_osb;
}
sb->s_flags &= ~MS_RDONLY;
osb->osb_flags &= ~OCFS2_OSB_SOFT_RO;
}
trace_ocfs2_remount(sb->s_flags, osb->osb_flags, *flags);
unlock_osb:
spin_unlock(&osb->osb_lock);
/* Enable quota accounting after remounting RW */
if (!ret && !(*flags & MS_RDONLY)) {
if (sb_any_quota_suspended(sb))
ret = ocfs2_susp_quotas(osb, 1);
else
ret = ocfs2_enable_quotas(osb);
if (ret < 0) {
/* Return back changes... */
spin_lock(&osb->osb_lock);
sb->s_flags |= MS_RDONLY;
osb->osb_flags |= OCFS2_OSB_SOFT_RO;
spin_unlock(&osb->osb_lock);
goto out;
}
}
}
if (!ret) {
/* Only save off the new mount options in case of a successful
* remount. */
osb->s_mount_opt = parsed_options.mount_opt;
osb->s_atime_quantum = parsed_options.atime_quantum;
osb->preferred_slot = parsed_options.slot;
if (parsed_options.commit_interval)
osb->osb_commit_interval = parsed_options.commit_interval;
if (!ocfs2_is_hard_readonly(osb))
ocfs2_set_journal_params(osb);
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ?
MS_POSIXACL : 0);
}
out:
return ret;
}
static int ocfs2_sb_probe(struct super_block *sb,
struct buffer_head **bh,
int *sector_size,
struct ocfs2_blockcheck_stats *stats)
{
int status, tmpstat;
struct ocfs1_vol_disk_hdr *hdr;
struct ocfs2_dinode *di;
int blksize;
*bh = NULL;
/* may be > 512 */
*sector_size = bdev_logical_block_size(sb->s_bdev);
if (*sector_size > OCFS2_MAX_BLOCKSIZE) {
mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n",
*sector_size, OCFS2_MAX_BLOCKSIZE);
status = -EINVAL;
goto bail;
}
/* Can this really happen? */
if (*sector_size < OCFS2_MIN_BLOCKSIZE)
*sector_size = OCFS2_MIN_BLOCKSIZE;
/* check block zero for old format */
status = ocfs2_get_sector(sb, bh, 0, *sector_size);
if (status < 0) {
mlog_errno(status);
goto bail;
}
hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data;
if (hdr->major_version == OCFS1_MAJOR_VERSION) {
mlog(ML_ERROR, "incompatible version: %u.%u\n",
hdr->major_version, hdr->minor_version);
status = -EINVAL;
}
if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE,
strlen(OCFS1_VOLUME_SIGNATURE)) == 0) {
mlog(ML_ERROR, "incompatible volume signature: %8s\n",
hdr->signature);
status = -EINVAL;
}
brelse(*bh);
*bh = NULL;
if (status < 0) {
mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be "
"upgraded before mounting with ocfs v2\n");
goto bail;
}
/*
* Now check at magic offset for 512, 1024, 2048, 4096
* blocksizes. 4096 is the maximum blocksize because it is
* the minimum clustersize.
*/
status = -EINVAL;
for (blksize = *sector_size;
blksize <= OCFS2_MAX_BLOCKSIZE;
blksize <<= 1) {
tmpstat = ocfs2_get_sector(sb, bh,
OCFS2_SUPER_BLOCK_BLKNO,
blksize);
if (tmpstat < 0) {
status = tmpstat;
mlog_errno(status);
break;
}
di = (struct ocfs2_dinode *) (*bh)->b_data;
memset(stats, 0, sizeof(struct ocfs2_blockcheck_stats));
spin_lock_init(&stats->b_lock);
tmpstat = ocfs2_verify_volume(di, *bh, blksize, stats);
if (tmpstat < 0) {
brelse(*bh);
*bh = NULL;
}
if (tmpstat != -EAGAIN) {
status = tmpstat;
break;
}
}
bail:
return status;
}
static int ocfs2_verify_heartbeat(struct ocfs2_super *osb)
{
u32 hb_enabled = OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL;
if (osb->s_mount_opt & hb_enabled) {
if (ocfs2_mount_local(osb)) {
mlog(ML_ERROR, "Cannot heartbeat on a locally "
"mounted device.\n");
return -EINVAL;
}
if (ocfs2_userspace_stack(osb)) {
mlog(ML_ERROR, "Userspace stack expected, but "
"o2cb heartbeat arguments passed to mount\n");
return -EINVAL;
}
if (((osb->s_mount_opt & OCFS2_MOUNT_HB_GLOBAL) &&
!ocfs2_cluster_o2cb_global_heartbeat(osb)) ||
((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) &&
ocfs2_cluster_o2cb_global_heartbeat(osb))) {
mlog(ML_ERROR, "Mismatching o2cb heartbeat modes\n");
return -EINVAL;
}
}
if (!(osb->s_mount_opt & hb_enabled)) {
if (!ocfs2_mount_local(osb) && !ocfs2_is_hard_readonly(osb) &&
!ocfs2_userspace_stack(osb)) {
mlog(ML_ERROR, "Heartbeat has to be started to mount "
"a read-write clustered device.\n");
return -EINVAL;
}
}
return 0;
}
/*
* If we're using a userspace stack, mount should have passed
* a name that matches the disk. If not, mount should not
* have passed a stack.
*/
static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb,
struct mount_options *mopt)
{
if (!ocfs2_userspace_stack(osb) && mopt->cluster_stack[0]) {
mlog(ML_ERROR,
"cluster stack passed to mount, but this filesystem "
"does not support it\n");
return -EINVAL;
}
if (ocfs2_userspace_stack(osb) &&
strncmp(osb->osb_cluster_stack, mopt->cluster_stack,
OCFS2_STACK_LABEL_LEN)) {
mlog(ML_ERROR,
"cluster stack passed to mount (\"%s\") does not "
"match the filesystem (\"%s\")\n",
mopt->cluster_stack,
osb->osb_cluster_stack);
return -EINVAL;
}
return 0;
}
static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend)
{
int type;
struct super_block *sb = osb->sb;
unsigned int feature[OCFS2_MAXQUOTAS] = {
OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
int status = 0;
for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
continue;
if (unsuspend)
status = dquot_resume(sb, type);
else {
struct ocfs2_mem_dqinfo *oinfo;
/* Cancel periodic syncing before suspending */
oinfo = sb_dqinfo(sb, type)->dqi_priv;
cancel_delayed_work_sync(&oinfo->dqi_sync_work);
status = dquot_suspend(sb, type);
}
if (status < 0)
break;
}
if (status < 0)
mlog(ML_ERROR, "Failed to suspend/unsuspend quotas on "
"remount (error = %d).\n", status);
return status;
}
static int ocfs2_enable_quotas(struct ocfs2_super *osb)
{
struct inode *inode[OCFS2_MAXQUOTAS] = { NULL, NULL };
struct super_block *sb = osb->sb;
unsigned int feature[OCFS2_MAXQUOTAS] = {
OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
unsigned int ino[OCFS2_MAXQUOTAS] = {
LOCAL_USER_QUOTA_SYSTEM_INODE,
LOCAL_GROUP_QUOTA_SYSTEM_INODE };
int status;
int type;
sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NEGATIVE_USAGE;
for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
continue;
inode[type] = ocfs2_get_system_file_inode(osb, ino[type],
osb->slot_num);
if (!inode[type]) {
status = -ENOENT;
goto out_quota_off;
}
status = dquot_enable(inode[type], type, QFMT_OCFS2,
DQUOT_USAGE_ENABLED);
if (status < 0)
goto out_quota_off;
}
for (type = 0; type < OCFS2_MAXQUOTAS; type++)
iput(inode[type]);
return 0;
out_quota_off:
ocfs2_disable_quotas(osb);
for (type = 0; type < OCFS2_MAXQUOTAS; type++)
iput(inode[type]);
mlog_errno(status);
return status;
}
static void ocfs2_disable_quotas(struct ocfs2_super *osb)
{
int type;
struct inode *inode;
struct super_block *sb = osb->sb;
struct ocfs2_mem_dqinfo *oinfo;
/* We mostly ignore errors in this function because there's not much
* we can do when we see them */
for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
if (!sb_has_quota_loaded(sb, type))
continue;
/* Cancel periodic syncing before we grab dqonoff_mutex */
oinfo = sb_dqinfo(sb, type)->dqi_priv;
cancel_delayed_work_sync(&oinfo->dqi_sync_work);
inode = igrab(sb->s_dquot.files[type]);
/* Turn off quotas. This will remove all dquot structures from
* memory and so they will be automatically synced to global
* quota files */
dquot_disable(sb, type, DQUOT_USAGE_ENABLED |
DQUOT_LIMITS_ENABLED);