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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/ocfs2/super.c
Initial import
Diffstat (limited to 'fs/ocfs2/super.c')
-rw-r--r--fs/ocfs2/super.c2644
1 files changed, 2644 insertions, 0 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
new file mode 100644
index 000000000..403c5660b
--- /dev/null
+++ b/fs/ocfs2/super.c
@@ -0,0 +1,2644 @@
+/* -*- 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,
+};
+
+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, 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);
+ if (!inode)
+ continue;
+ iput(inode);
+ }
+}
+
+static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct dentry *root;
+ int status, sector_size;
+ struct mount_options parsed_options;
+ struct inode *inode = NULL;
+ struct ocfs2_super *osb = NULL;
+ struct buffer_head *bh = NULL;
+ char nodestr[12];
+ struct ocfs2_blockcheck_stats stats;
+
+ trace_ocfs2_fill_super(sb, data, silent);
+
+ if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
+ status = -EINVAL;
+ goto read_super_error;
+ }
+
+ /* probe for superblock */
+ status = ocfs2_sb_probe(sb, &bh, &sector_size, &stats);
+ if (status < 0) {
+ mlog(ML_ERROR, "superblock probe failed!\n");
+ goto read_super_error;
+ }
+
+ status = ocfs2_initialize_super(sb, bh, sector_size, &stats);
+ osb = OCFS2_SB(sb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto read_super_error;
+ }
+ brelse(bh);
+ bh = NULL;
+
+ if (!ocfs2_check_set_options(sb, &parsed_options)) {
+ status = -EINVAL;
+ goto read_super_error;
+ }
+ osb->s_mount_opt = parsed_options.mount_opt;
+ osb->s_atime_quantum = parsed_options.atime_quantum;
+ osb->preferred_slot = parsed_options.slot;
+ osb->osb_commit_interval = parsed_options.commit_interval;
+
+ ocfs2_la_set_sizes(osb, parsed_options.localalloc_opt);
+ osb->osb_resv_level = parsed_options.resv_level;
+ osb->osb_dir_resv_level = parsed_options.resv_level;
+ if (parsed_options.dir_resv_level == -1)
+ osb->osb_dir_resv_level = parsed_options.resv_level;
+ else
+ osb->osb_dir_resv_level = parsed_options.dir_resv_level;
+
+ status = ocfs2_verify_userspace_stack(osb, &parsed_options);
+ if (status)
+ goto read_super_error;
+
+ sb->s_magic = OCFS2_SUPER_MAGIC;
+
+ sb->s_flags = (sb->s_flags & ~(MS_POSIXACL | MS_NOSEC)) |
+ ((osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
+
+ /* Hard readonly mode only if: bdev_read_only, MS_RDONLY,
+ * heartbeat=none */
+ if (bdev_read_only(sb->s_bdev)) {
+ if (!(sb->s_flags & MS_RDONLY)) {
+ status = -EACCES;
+ mlog(ML_ERROR, "Readonly device detected but readonly "
+ "mount was not specified.\n");
+ goto read_super_error;
+ }
+
+ /* You should not be able to start a local heartbeat
+ * on a readonly device. */
+ if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) {
+ status = -EROFS;
+ mlog(ML_ERROR, "Local heartbeat specified on readonly "
+ "device.\n");
+ goto read_super_error;
+ }
+
+ status = ocfs2_check_journals_nolocks(osb);
+ if (status < 0) {
+ if (status == -EROFS)
+ mlog(ML_ERROR, "Recovery required on readonly "
+ "file system, but write access is "
+ "unavailable.\n");
+ else
+ mlog_errno(status);
+ goto read_super_error;
+ }
+
+ ocfs2_set_ro_flag(osb, 1);
+
+ printk(KERN_NOTICE "ocfs2: Readonly device (%s) detected. "
+ "Cluster services will not be used for this mount. "
+ "Recovery will be skipped.\n", osb->dev_str);
+ }
+
+ if (!ocfs2_is_hard_readonly(osb)) {
+ if (sb->s_flags & MS_RDONLY)
+ ocfs2_set_ro_flag(osb, 0);
+ }
+
+ status = ocfs2_verify_heartbeat(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto read_super_error;
+ }
+
+ osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
+ ocfs2_debugfs_root);
+ if (!osb->osb_debug_root) {
+ status = -EINVAL;
+ mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
+ goto read_super_error;
+ }
+
+ osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
+ osb->osb_debug_root,
+ osb,
+ &ocfs2_osb_debug_fops);
+ if (!osb->osb_ctxt) {
+ status = -EINVAL;
+ mlog_errno(status);
+ goto read_super_error;
+ }
+
+ if (ocfs2_meta_ecc(osb)) {
+ status = ocfs2_blockcheck_stats_debugfs_install(
+ &osb->osb_ecc_stats,
+ osb->osb_debug_root);
+ if (status) {
+ mlog(ML_ERROR,
+ "Unable to create blockcheck statistics "
+ "files\n");
+ goto read_super_error;
+ }
+ }
+
+ status = ocfs2_mount_volume(sb);
+ if (status < 0)
+ goto read_super_error;
+
+ if (osb->root_inode)
+ inode = igrab(osb->root_inode);
+
+ if (!inode) {
+ status = -EIO;
+ mlog_errno(status);
+ goto read_super_error;
+ }
+
+ root = d_make_root(inode);
+ if (!root) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto read_super_error;
+ }
+
+ sb->s_root = root;
+
+ ocfs2_complete_mount_recovery(osb);
+
+ if (ocfs2_mount_local(osb))
+ snprintf(nodestr, sizeof(nodestr), "local");
+ else
+ snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
+
+ printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %s, slot %d) "
+ "with %s data mode.\n",
+ osb->dev_str, nodestr, osb->slot_num,
+ osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" :
+ "ordered");
+
+ atomic_set(&osb->vol_state, VOLUME_MOUNTED);
+ wake_up(&osb->osb_mount_event);
+
+ /* Now we can initialize quotas because we can afford to wait
+ * for cluster locks recovery now. That also means that truncation
+ * log recovery can happen but that waits for proper quota setup */
+ if (!(sb->s_flags & MS_RDONLY)) {
+ status = ocfs2_enable_quotas(osb);
+ if (status < 0) {
+ /* We have to err-out specially here because
+ * s_root is already set */
+ mlog_errno(status);
+ atomic_set(&osb->vol_state, VOLUME_DISABLED);
+ wake_up(&osb->osb_mount_event);
+ return status;
+ }
+ }
+
+ ocfs2_complete_quota_recovery(osb);
+
+ /* Now we wake up again for processes waiting for quotas */
+ atomic_set(&osb->vol_state, VOLUME_MOUNTED_QUOTAS);
+ wake_up(&osb->osb_mount_event);
+
+ /* Start this when the mount is almost sure of being successful */
+ ocfs2_orphan_scan_start(osb);
+
+ return status;
+
+read_super_error:
+ brelse(bh);
+
+ if (osb) {
+ atomic_set(&osb->vol_state, VOLUME_DISABLED);
+ wake_up(&osb->osb_mount_event);
+ ocfs2_dismount_volume(sb, 1);
+ }
+
+ if (status)
+ mlog_errno(status);
+ return status;
+}
+
+static struct dentry *ocfs2_mount(struct file_system_type *fs_type,
+ int flags,
+ const char *dev_name,
+ void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super);
+}
+
+static struct file_system_type ocfs2_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "ocfs2",
+ .mount = ocfs2_mount,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE,
+ .next = NULL
+};
+MODULE_ALIAS_FS("ocfs2");
+
+static int ocfs2_check_set_options(struct super_block *sb,
+ struct mount_options *options)
+{
+ if (options->mount_opt & OCFS2_MOUNT_USRQUOTA &&
+ !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
+ mlog(ML_ERROR, "User quotas were requested, but this "
+ "filesystem does not have the feature enabled.\n");
+ return 0;
+ }
+ if (options->mount_opt & OCFS2_MOUNT_GRPQUOTA &&
+ !OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
+ mlog(ML_ERROR, "Group quotas were requested, but this "
+ "filesystem does not have the feature enabled.\n");
+ return 0;
+ }
+ if (options->mount_opt & OCFS2_MOUNT_POSIX_ACL &&
+ !OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR)) {
+ mlog(ML_ERROR, "ACL support requested but extended attributes "
+ "feature is not enabled\n");
+ return 0;
+ }
+ /* No ACL setting specified? Use XATTR feature... */
+ if (!(options->mount_opt & (OCFS2_MOUNT_POSIX_ACL |
+ OCFS2_MOUNT_NO_POSIX_ACL))) {
+ if (OCFS2_HAS_INCOMPAT_FEATURE(sb, OCFS2_FEATURE_INCOMPAT_XATTR))
+ options->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
+ else
+ options->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
+ }
+ return 1;
+}
+
+static int ocfs2_parse_options(struct super_block *sb,
+ char *options,
+ struct mount_options *mopt,
+ int is_remount)
+{
+ int status, user_stack = 0;
+ char *p;
+ u32 tmp;
+
+ trace_ocfs2_parse_options(is_remount, options ? options : "(none)");
+
+ mopt->commit_interval = 0;
+ mopt->mount_opt = OCFS2_MOUNT_NOINTR;
+ mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
+ mopt->slot = OCFS2_INVALID_SLOT;
+ mopt->localalloc_opt = -1;
+ mopt->cluster_stack[0] = '\0';
+ mopt->resv_level = OCFS2_DEFAULT_RESV_LEVEL;
+ mopt->dir_resv_level = -1;
+
+ if (!options) {
+ status = 1;
+ goto bail;
+ }
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token, option;
+ substring_t args[MAX_OPT_ARGS];
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_hb_local:
+ mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
+ break;
+ case Opt_hb_none:
+ mopt->mount_opt |= OCFS2_MOUNT_HB_NONE;
+ break;
+ case Opt_hb_global:
+ mopt->mount_opt |= OCFS2_MOUNT_HB_GLOBAL;
+ break;
+ case Opt_barrier:
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option)
+ mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
+ else
+ mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
+ break;
+ case Opt_intr:
+ mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
+ break;
+ case Opt_nointr:
+ mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
+ break;
+ case Opt_err_panic:
+ mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
+ break;
+ case Opt_err_ro:
+ mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
+ break;
+ case Opt_data_ordered:
+ mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
+ break;
+ case Opt_data_writeback:
+ mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
+ break;
+ case Opt_user_xattr:
+ mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
+ break;
+ case Opt_nouser_xattr:
+ mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
+ break;
+ case Opt_atime_quantum:
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option >= 0)
+ mopt->atime_quantum = option;
+ break;
+ case Opt_slot:
+ option = 0;
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option)
+ mopt->slot = (s16)option;
+ break;
+ case Opt_commit:
+ option = 0;
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option < 0)
+ return 0;
+ if (option == 0)
+ option = JBD2_DEFAULT_MAX_COMMIT_AGE;
+ mopt->commit_interval = HZ * option;
+ break;
+ case Opt_localalloc:
+ option = 0;
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option >= 0)
+ mopt->localalloc_opt = option;
+ break;
+ case Opt_localflocks:
+ /*
+ * Changing this during remount could race
+ * flock() requests, or "unbalance" existing
+ * ones (e.g., a lock is taken in one mode but
+ * dropped in the other). If users care enough
+ * to flip locking modes during remount, we
+ * could add a "local" flag to individual
+ * flock structures for proper tracking of
+ * state.
+ */
+ if (!is_remount)
+ mopt->mount_opt |= OCFS2_MOUNT_LOCALFLOCKS;
+ break;
+ case Opt_stack:
+ /* Check both that the option we were passed
+ * is of the right length and that it is a proper
+ * string of the right length.
+ */
+ if (((args[0].to - args[0].from) !=
+ OCFS2_STACK_LABEL_LEN) ||
+ (strnlen(args[0].from,
+ OCFS2_STACK_LABEL_LEN) !=
+ OCFS2_STACK_LABEL_LEN)) {
+ mlog(ML_ERROR,
+ "Invalid cluster_stack option\n");
+ status = 0;
+ goto bail;
+ }
+ memcpy(mopt->cluster_stack, args[0].from,
+ OCFS2_STACK_LABEL_LEN);
+ mopt->cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0';
+ /*
+ * Open code the memcmp here as we don't have
+ * an osb to pass to
+ * ocfs2_userspace_stack().
+ */
+ if (memcmp(mopt->cluster_stack,
+ OCFS2_CLASSIC_CLUSTER_STACK,
+ OCFS2_STACK_LABEL_LEN))
+ user_stack = 1;
+ break;
+ case Opt_inode64:
+ mopt->mount_opt |= OCFS2_MOUNT_INODE64;
+ break;
+ case Opt_usrquota:
+ mopt->mount_opt |= OCFS2_MOUNT_USRQUOTA;
+ break;
+ case Opt_grpquota:
+ mopt->mount_opt |= OCFS2_MOUNT_GRPQUOTA;
+ break;
+ case Opt_coherency_buffered:
+ mopt->mount_opt |= OCFS2_MOUNT_COHERENCY_BUFFERED;
+ break;
+ case Opt_coherency_full:
+ mopt->mount_opt &= ~OCFS2_MOUNT_COHERENCY_BUFFERED;
+ break;
+ case Opt_acl:
+ mopt->mount_opt |= OCFS2_MOUNT_POSIX_ACL;
+ mopt->mount_opt &= ~OCFS2_MOUNT_NO_POSIX_ACL;
+ break;
+ case Opt_noacl:
+ mopt->mount_opt |= OCFS2_MOUNT_NO_POSIX_ACL;
+ mopt->mount_opt &= ~OCFS2_MOUNT_POSIX_ACL;
+ break;
+ case Opt_resv_level:
+ if (is_remount)
+ break;
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option >= OCFS2_MIN_RESV_LEVEL &&
+ option < OCFS2_MAX_RESV_LEVEL)
+ mopt->resv_level = option;
+ break;
+ case Opt_dir_resv_level:
+ if (is_remount)
+ break;
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option >= OCFS2_MIN_RESV_LEVEL &&
+ option < OCFS2_MAX_RESV_LEVEL)
+ mopt->dir_resv_level = option;
+ break;
+ case Opt_journal_async_commit:
+ mopt->mount_opt |= OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT;
+ break;
+ default:
+ mlog(ML_ERROR,
+ "Unrecognized mount option \"%s\" "
+ "or missing value\n", p);
+ status = 0;
+ goto bail;
+ }
+ }
+
+ if (user_stack == 0) {
+ /* Ensure only one heartbeat mode */
+ tmp = mopt->mount_opt & (OCFS2_MOUNT_HB_LOCAL |
+ OCFS2_MOUNT_HB_GLOBAL |
+ OCFS2_MOUNT_HB_NONE);
+ if (hweight32(tmp) != 1) {
+ mlog(ML_ERROR, "Invalid heartbeat mount options\n");
+ status = 0;
+ goto bail;
+ }
+ }
+
+ status = 1;
+
+bail:
+ return status;
+}
+
+static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
+{
+ struct ocfs2_super *osb = OCFS2_SB(root->d_sb);
+ unsigned long opts = osb->s_mount_opt;
+ unsigned int local_alloc_megs;
+
+ if (opts & (OCFS2_MOUNT_HB_LOCAL | OCFS2_MOUNT_HB_GLOBAL)) {
+ seq_printf(s, ",_netdev");
+ if (opts & OCFS2_MOUNT_HB_LOCAL)
+ seq_printf(s, ",%s", OCFS2_HB_LOCAL);
+ else
+ seq_printf(s, ",%s", OCFS2_HB_GLOBAL);
+ } else
+ seq_printf(s, ",%s", OCFS2_HB_NONE);
+
+ if (opts & OCFS2_MOUNT_NOINTR)
+ seq_printf(s, ",nointr");
+
+ if (opts & OCFS2_MOUNT_DATA_WRITEBACK)
+ seq_printf(s, ",data=writeback");
+ else
+ seq_printf(s, ",data=ordered");
+
+ if (opts & OCFS2_MOUNT_BARRIER)
+ seq_printf(s, ",barrier=1");
+
+ if (opts & OCFS2_MOUNT_ERRORS_PANIC)
+ seq_printf(s, ",errors=panic");
+ else
+ seq_printf(s, ",errors=remount-ro");
+
+ if (osb->preferred_slot != OCFS2_INVALID_SLOT)
+ seq_printf(s, ",preferred_slot=%d", osb->preferred_slot);
+
+ seq_printf(s, ",atime_quantum=%u", osb->s_atime_quantum);
+
+ if (osb->osb_commit_interval)
+ seq_printf(s, ",commit=%u",
+ (unsigned) (osb->osb_commit_interval / HZ));
+
+ local_alloc_megs = osb->local_alloc_bits >> (20 - osb->s_clustersize_bits);
+ if (local_alloc_megs != ocfs2_la_default_mb(osb))
+ seq_printf(s, ",localalloc=%d", local_alloc_megs);
+
+ if (opts & OCFS2_MOUNT_LOCALFLOCKS)
+ seq_printf(s, ",localflocks,");
+
+ if (osb->osb_cluster_stack[0])
+ seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
+ osb->osb_cluster_stack);
+ if (opts & OCFS2_MOUNT_USRQUOTA)
+ seq_printf(s, ",usrquota");
+ if (opts & OCFS2_MOUNT_GRPQUOTA)
+ seq_printf(s, ",grpquota");
+
+ if (opts & OCFS2_MOUNT_COHERENCY_BUFFERED)
+ seq_printf(s, ",coherency=buffered");
+ else
+ seq_printf(s, ",coherency=full");
+
+ if (opts & OCFS2_MOUNT_NOUSERXATTR)
+ seq_printf(s, ",nouser_xattr");
+ else
+ seq_printf(s, ",user_xattr");
+
+ if (opts & OCFS2_MOUNT_INODE64)
+ seq_printf(s, ",inode64");
+
+ if (opts & OCFS2_MOUNT_POSIX_ACL)
+ seq_printf(s, ",acl");
+ else
+ seq_printf(s, ",noacl");
+
+ if (osb->osb_resv_level != OCFS2_DEFAULT_RESV_LEVEL)
+ seq_printf(s, ",resv_level=%d", osb->osb_resv_level);
+
+ if (osb->osb_dir_resv_level != osb->osb_resv_level)
+ seq_printf(s, ",dir_resv_level=%d", osb->osb_resv_level);
+
+ if (opts & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
+ seq_printf(s, ",journal_async_commit");
+
+ return 0;
+}
+
+static int __init ocfs2_init(void)
+{
+ int status;
+
+ status = init_ocfs2_uptodate_cache();
+ if (status < 0)
+ goto out1;
+
+ status = ocfs2_initialize_mem_caches();
+ if (status < 0)
+ goto out2;
+
+ ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
+ if (!ocfs2_wq) {
+ status = -ENOMEM;
+ goto out3;
+ }
+
+ ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
+ if (!ocfs2_debugfs_root) {
+ status = -ENOMEM;
+ mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
+ goto out4;
+ }
+
+ ocfs2_set_locking_protocol();
+
+ status = register_quota_format(&ocfs2_quota_format);
+ if (status < 0)
+ goto out4;
+ status = register_filesystem(&ocfs2_fs_type);
+ if (!status)
+ return 0;
+
+ unregister_quota_format(&ocfs2_quota_format);
+out4:
+ destroy_workqueue(ocfs2_wq);
+ debugfs_remove(ocfs2_debugfs_root);
+out3:
+ ocfs2_free_mem_caches();
+out2:
+ exit_ocfs2_uptodate_cache();
+out1:
+ mlog_errno(status);
+ return status;
+}
+
+static void __exit ocfs2_exit(void)
+{
+ if (ocfs2_wq) {
+ flush_workqueue(ocfs2_wq);
+ destroy_workqueue(ocfs2_wq);
+ }
+
+ unregister_quota_format(&ocfs2_quota_format);
+
+ debugfs_remove(ocfs2_debugfs_root);
+
+ ocfs2_free_mem_caches();
+
+ unregister_filesystem(&ocfs2_fs_type);
+
+ exit_ocfs2_uptodate_cache();
+}
+
+static void ocfs2_put_super(struct super_block *sb)
+{
+ trace_ocfs2_put_super(sb);
+
+ ocfs2_sync_blockdev(sb);
+ ocfs2_dismount_volume(sb, 0);
+}
+
+static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct ocfs2_super *osb;
+ u32 numbits, freebits;
+ int status;
+ struct ocfs2_dinode *bm_lock;
+ struct buffer_head *bh = NULL;
+ struct inode *inode = NULL;
+
+ trace_ocfs2_statfs(dentry->d_sb, buf);
+
+ osb = OCFS2_SB(dentry->d_sb);
+
+ inode = ocfs2_get_system_file_inode(osb,
+ GLOBAL_BITMAP_SYSTEM_INODE,
+ OCFS2_INVALID_SLOT);
+ if (!inode) {
+ mlog(ML_ERROR, "failed to get bitmap inode\n");
+ status = -EIO;
+ goto bail;
+ }
+
+ status = ocfs2_inode_lock(inode, &bh, 0);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ bm_lock = (struct ocfs2_dinode *) bh->b_data;
+
+ numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total);
+ freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used);
+
+ buf->f_type = OCFS2_SUPER_MAGIC;
+ buf->f_bsize = dentry->d_sb->s_blocksize;
+ buf->f_namelen = OCFS2_MAX_FILENAME_LEN;
+ buf->f_blocks = ((sector_t) numbits) *
+ (osb->s_clustersize >> osb->sb->s_blocksize_bits);
+ buf->f_bfree = ((sector_t) freebits) *
+ (osb->s_clustersize >> osb->sb->s_blocksize_bits);
+ buf->f_bavail = buf->f_bfree;
+ buf->f_files = numbits;
+ buf->f_ffree = freebits;
+ buf->f_fsid.val[0] = crc32_le(0, osb->uuid_str, OCFS2_VOL_UUID_LEN)
+ & 0xFFFFFFFFUL;
+ buf->f_fsid.val[1] = crc32_le(0, osb->uuid_str + OCFS2_VOL_UUID_LEN,
+ OCFS2_VOL_UUID_LEN) & 0xFFFFFFFFUL;
+
+ brelse(bh);
+
+ ocfs2_inode_unlock(inode, 0);
+ status = 0;
+bail:
+ if (inode)
+ iput(inode);
+
+ if (status)
+ mlog_errno(status);
+
+ return status;
+}
+
+static void ocfs2_inode_init_once(void *data)
+{
+ struct ocfs2_inode_info *oi = data;
+
+ oi->ip_flags = 0;
+ oi->ip_open_count = 0;
+ spin_lock_init(&oi->ip_lock);
+ ocfs2_extent_map_init(&oi->vfs_inode);
+ INIT_LIST_HEAD(&oi->ip_io_markers);
+ oi->ip_dir_start_lookup = 0;
+ mutex_init(&oi->ip_unaligned_aio);
+ init_rwsem(&oi->ip_alloc_sem);
+ init_rwsem(&oi->ip_xattr_sem);
+ mutex_init(&oi->ip_io_mutex);
+
+ oi->ip_blkno = 0ULL;
+ oi->ip_clusters = 0;
+
+ ocfs2_resv_init_once(&oi->ip_la_data_resv);
+
+ ocfs2_lock_res_init_once(&oi->ip_rw_lockres);
+ ocfs2_lock_res_init_once(&oi->ip_inode_lockres);
+ ocfs2_lock_res_init_once(&oi->ip_open_lockres);
+
+ init_waitqueue_head(&oi->append_dio_wq);
+
+ ocfs2_metadata_cache_init(INODE_CACHE(&oi->vfs_inode),
+ &ocfs2_inode_caching_ops);
+
+ inode_init_once(&oi->vfs_inode);
+}
+
+static int ocfs2_initialize_mem_caches(void)
+{
+ ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache",
+ sizeof(struct ocfs2_inode_info),
+ 0,
+ (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
+ ocfs2_inode_init_once);
+ ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
+ sizeof(struct ocfs2_dquot),
+ 0,
+ (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD),
+ NULL);
+ ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
+ sizeof(struct ocfs2_quota_chunk),
+ 0,
+ (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
+ NULL);
+ if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
+ !ocfs2_qf_chunk_cachep) {
+ if (ocfs2_inode_cachep)
+ kmem_cache_destroy(ocfs2_inode_cachep);
+ if (ocfs2_dquot_cachep)
+ kmem_cache_destroy(ocfs2_dquot_cachep);
+ if (ocfs2_qf_chunk_cachep)
+ kmem_cache_destroy(ocfs2_qf_chunk_cachep);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static void ocfs2_free_mem_caches(void)
+{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ if (ocfs2_inode_cachep)
+ kmem_cache_destroy(ocfs2_inode_cachep);
+ ocfs2_inode_cachep = NULL;
+
+ if (ocfs2_dquot_cachep)
+ kmem_cache_destroy(ocfs2_dquot_cachep);
+ ocfs2_dquot_cachep = NULL;
+
+ if (ocfs2_qf_chunk_cachep)
+ kmem_cache_destroy(ocfs2_qf_chunk_cachep);
+ ocfs2_qf_chunk_cachep = NULL;
+}
+
+static int ocfs2_get_sector(struct super_block *sb,
+ struct buffer_head **bh,
+ int block,
+ int sect_size)
+{
+ if (!sb_set_blocksize(sb, sect_size)) {
+ mlog(ML_ERROR, "unable to set blocksize\n");
+ return -EIO;
+ }
+
+ *bh = sb_getblk(sb, block);
+ if (!*bh) {
+ mlog_errno(-ENOMEM);
+ return -ENOMEM;
+ }
+ lock_buffer(*bh);
+ if (!buffer_dirty(*bh))
+ clear_buffer_uptodate(*bh);
+ unlock_buffer(*bh);
+ ll_rw_block(READ, 1, bh);
+ wait_on_buffer(*bh);
+ if (!buffer_uptodate(*bh)) {
+ mlog_errno(-EIO);
+ brelse(*bh);
+ *bh = NULL;
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int ocfs2_mount_volume(struct super_block *sb)
+{
+ int status = 0;
+ int unlock_super = 0;
+ struct ocfs2_super *osb = OCFS2_SB(sb);
+
+ if (ocfs2_is_hard_readonly(osb))
+ goto leave;
+
+ status = ocfs2_dlm_init(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_super_lock(osb, 1);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+ unlock_super = 1;
+
+ /* This will load up the node map and add ourselves to it. */
+ status = ocfs2_find_slot(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ /* load all node-local system inodes */
+ status = ocfs2_init_local_system_inodes(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_check_volume(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto leave;
+ }
+
+ status = ocfs2_truncate_log_init(osb);
+ if (status < 0)
+ mlog_errno(status);
+
+leave:
+ if (unlock_super)
+ ocfs2_super_unlock(osb, 1);
+
+ return status;
+}
+
+static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err)
+{
+ int tmp, hangup_needed = 0;
+ struct ocfs2_super *osb = NULL;
+ char nodestr[12];
+
+ trace_ocfs2_dismount_volume(sb);
+
+ BUG_ON(!sb);
+ osb = OCFS2_SB(sb);
+ BUG_ON(!osb);
+
+ debugfs_remove(osb->osb_ctxt);
+
+ /* Orphan scan should be stopped as early as possible */
+ ocfs2_orphan_scan_stop(osb);
+
+ ocfs2_disable_quotas(osb);
+
+ /* All dquots should be freed by now */
+ WARN_ON(!llist_empty(&osb->dquot_drop_list));
+ /* Wait for worker to be done with the work structure in osb */
+ cancel_work_sync(&osb->dquot_drop_work);
+
+ ocfs2_shutdown_local_alloc(osb);
+
+ ocfs2_truncate_log_shutdown(osb);
+
+ /* This will disable recovery and flush any recovery work. */
+ ocfs2_recovery_exit(osb);
+
+ ocfs2_journal_shutdown(osb);
+
+ ocfs2_sync_blockdev(sb);
+
+ ocfs2_purge_refcount_trees(osb);
+
+ /* No cluster connection means we've failed during mount, so skip
+ * all the steps which depended on that to complete. */
+ if (osb->cconn) {
+ tmp = ocfs2_super_lock(osb, 1);
+ if (tmp < 0) {
+ mlog_errno(tmp);
+ return;
+ }
+ }
+
+ if (osb->slot_num != OCFS2_INVALID_SLOT)
+ ocfs2_put_slot(osb);
+
+ if (osb->cconn)
+ ocfs2_super_unlock(osb, 1);
+
+ ocfs2_release_system_inodes(osb);
+
+ /*
+ * If we're dismounting due to mount error, mount.ocfs2 will clean
+ * up heartbeat. If we're a local mount, there is no heartbeat.
+ * If we failed before we got a uuid_str yet, we can't stop
+ * heartbeat. Otherwise, do it.
+ */
+ if (!mnt_err && !ocfs2_mount_local(osb) && osb->uuid_str &&
+ !ocfs2_is_hard_readonly(osb))
+ hangup_needed = 1;
+
+ if (osb->cconn)
+ ocfs2_dlm_shutdown(osb, hangup_needed);
+
+ ocfs2_blockcheck_stats_debugfs_remove(&osb->osb_ecc_stats);
+ debugfs_remove(osb->osb_debug_root);
+
+ if (hangup_needed)
+ ocfs2_cluster_hangup(osb->uuid_str, strlen(osb->uuid_str));
+
+ atomic_set(&osb->vol_state, VOLUME_DISMOUNTED);
+
+ if (ocfs2_mount_local(osb))
+ snprintf(nodestr, sizeof(nodestr), "local");
+ else
+ snprintf(nodestr, sizeof(nodestr), "%u", osb->node_num);
+
+ printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %s)\n",
+ osb->dev_str, nodestr);
+
+ ocfs2_delete_osb(osb);
+ kfree(osb);
+ sb->s_dev = 0;
+ sb->s_fs_info = NULL;
+}
+
+static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid,
+ unsigned uuid_bytes)
+{
+ int i, ret;
+ char *ptr;
+
+ BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN);
+
+ osb->uuid_str = kzalloc(OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL);
+ if (osb->uuid_str == NULL)
+ return -ENOMEM;
+
+ for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) {
+ /* print with null */
+ ret = snprintf(ptr, 3, "%02X", uuid[i]);
+ if (ret != 2) /* drop super cleans up */
+ return -EINVAL;
+ /* then only advance past the last char */
+ ptr += 2;
+ }
+
+ return 0;
+}
+
+/* Make sure entire volume is addressable by our journal. Requires
+ osb_clusters_at_boot to be valid and for the journal to have been
+ initialized by ocfs2_journal_init(). */
+static int ocfs2_journal_addressable(struct ocfs2_super *osb)
+{
+ int status = 0;
+ u64 max_block =
+ ocfs2_clusters_to_blocks(osb->sb,
+ osb->osb_clusters_at_boot) - 1;
+
+ /* 32-bit block number is always OK. */
+ if (max_block <= (u32)~0ULL)
+ goto out;
+
+ /* Volume is "huge", so see if our journal is new enough to
+ support it. */
+ if (!(OCFS2_HAS_COMPAT_FEATURE(osb->sb,
+ OCFS2_FEATURE_COMPAT_JBD2_SB) &&
+ jbd2_journal_check_used_features(osb->journal->j_journal, 0, 0,
+ JBD2_FEATURE_INCOMPAT_64BIT))) {
+ mlog(ML_ERROR, "The journal cannot address the entire volume. "
+ "Enable the 'block64' journal option with tunefs.ocfs2");
+ status = -EFBIG;
+ goto out;
+ }
+
+ out:
+ return status;
+}
+
+static int ocfs2_initialize_super(struct super_block *sb,
+ struct buffer_head *bh,
+ int sector_size,
+ struct ocfs2_blockcheck_stats *stats)
+{
+ int status;
+ int i, cbits, bbits;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
+ struct inode *inode = NULL;
+ struct ocfs2_journal *journal;
+ struct ocfs2_super *osb;
+ u64 total_blocks;
+
+ osb = kzalloc(sizeof(struct ocfs2_super), GFP_KERNEL);
+ if (!osb) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ sb->s_fs_info = osb;
+ sb->s_op = &ocfs2_sops;
+ sb->s_d_op = &ocfs2_dentry_ops;
+ sb->s_export_op = &ocfs2_export_ops;
+ sb->s_qcop = &dquot_quotactl_sysfile_ops;
+ sb->dq_op = &ocfs2_quota_operations;
+ sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
+ sb->s_xattr = ocfs2_xattr_handlers;
+ sb->s_time_gran = 1;
+ sb->s_flags |= MS_NOATIME;
+ /* this is needed to support O_LARGEFILE */
+ cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
+ bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
+ sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
+ memcpy(sb->s_uuid, di->id2.i_super.s_uuid,
+ sizeof(di->id2.i_super.s_uuid));
+
+ osb->osb_dx_mask = (1 << (cbits - bbits)) - 1;
+
+ for (i = 0; i < 3; i++)
+ osb->osb_dx_seed[i] = le32_to_cpu(di->id2.i_super.s_dx_seed[i]);
+ osb->osb_dx_seed[3] = le32_to_cpu(di->id2.i_super.s_uuid_hash);
+
+ osb->sb = sb;
+ /* Save off for ocfs2_rw_direct */
+ osb->s_sectsize_bits = blksize_bits(sector_size);
+ BUG_ON(!osb->s_sectsize_bits);
+
+ spin_lock_init(&osb->dc_task_lock);
+ init_waitqueue_head(&osb->dc_event);
+ osb->dc_work_sequence = 0;
+ osb->dc_wake_sequence = 0;
+ INIT_LIST_HEAD(&osb->blocked_lock_list);
+ osb->blocked_lock_count = 0;
+ spin_lock_init(&osb->osb_lock);
+ spin_lock_init(&osb->osb_xattr_lock);
+ ocfs2_init_steal_slots(osb);
+
+ mutex_init(&osb->system_file_mutex);
+
+ atomic_set(&osb->alloc_stats.moves, 0);
+ atomic_set(&osb->alloc_stats.local_data, 0);
+ atomic_set(&osb->alloc_stats.bitmap_data, 0);
+ atomic_set(&osb->alloc_stats.bg_allocs, 0);
+ atomic_set(&osb->alloc_stats.bg_extends, 0);
+
+ /* Copy the blockcheck stats from the superblock probe */
+ osb->osb_ecc_stats = *stats;
+
+ ocfs2_init_node_maps(osb);
+
+ snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u",
+ MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
+
+ osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
+ if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
+ mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
+ osb->max_slots);
+ status = -EINVAL;
+ goto bail;
+ }
+
+ ocfs2_orphan_scan_init(osb);
+
+ status = ocfs2_recovery_init(osb);
+ if (status) {
+ mlog(ML_ERROR, "Unable to initialize recovery state\n");
+ mlog_errno(status);
+ goto bail;
+ }
+
+ init_waitqueue_head(&osb->checkpoint_event);
+
+ osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
+
+ osb->slot_num = OCFS2_INVALID_SLOT;
+
+ osb->s_xattr_inline_size = le16_to_cpu(
+ di->id2.i_super.s_xattr_inline_size);
+
+ osb->local_alloc_state = OCFS2_LA_UNUSED;
+ osb->local_alloc_bh = NULL;
+ INIT_DELAYED_WORK(&osb->la_enable_wq, ocfs2_la_enable_worker);
+
+ init_waitqueue_head(&osb->osb_mount_event);
+
+ status = ocfs2_resmap_init(osb, &osb->osb_la_resmap);
+ if (status) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL);
+ if (!osb->vol_label) {
+ mlog(ML_ERROR, "unable to alloc vol label\n");
+ status = -ENOMEM;
+ goto bail;
+ }
+
+ osb->slot_recovery_generations =
+ kcalloc(osb->max_slots, sizeof(*osb->slot_recovery_generations),
+ GFP_KERNEL);
+ if (!osb->slot_recovery_generations) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ init_waitqueue_head(&osb->osb_wipe_event);
+ osb->osb_orphan_wipes = kcalloc(osb->max_slots,
+ sizeof(*osb->osb_orphan_wipes),
+ GFP_KERNEL);
+ if (!osb->osb_orphan_wipes) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ osb->osb_rf_lock_tree = RB_ROOT;
+
+ osb->s_feature_compat =
+ le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat);
+ osb->s_feature_ro_compat =
+ le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat);
+ osb->s_feature_incompat =
+ le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat);
+
+ if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) {
+ mlog(ML_ERROR, "couldn't mount because of unsupported "
+ "optional features (%x).\n", i);
+ status = -EINVAL;
+ goto bail;
+ }
+ if (!(osb->sb->s_flags & MS_RDONLY) &&
+ (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) {
+ mlog(ML_ERROR, "couldn't mount RDWR because of "
+ "unsupported optional features (%x).\n", i);
+ status = -EINVAL;
+ goto bail;
+ }
+
+ if (ocfs2_clusterinfo_valid(osb)) {
+ osb->osb_stackflags =
+ OCFS2_RAW_SB(di)->s_cluster_info.ci_stackflags;
+ strlcpy(osb->osb_cluster_stack,
+ OCFS2_RAW_SB(di)->s_cluster_info.ci_stack,
+ OCFS2_STACK_LABEL_LEN + 1);
+ if (strlen(osb->osb_cluster_stack) != OCFS2_STACK_LABEL_LEN) {
+ mlog(ML_ERROR,
+ "couldn't mount because of an invalid "
+ "cluster stack label (%s) \n",
+ osb->osb_cluster_stack);
+ status = -EINVAL;
+ goto bail;
+ }
+ strlcpy(osb->osb_cluster_name,
+ OCFS2_RAW_SB(di)->s_cluster_info.ci_cluster,
+ OCFS2_CLUSTER_NAME_LEN + 1);
+ } else {
+ /* The empty string is identical with classic tools that
+ * don't know about s_cluster_info. */
+ osb->osb_cluster_stack[0] = '\0';
+ }
+
+ get_random_bytes(&osb->s_next_generation, sizeof(u32));
+
+ /* FIXME
+ * This should be done in ocfs2_journal_init(), but unknown
+ * ordering issues will cause the filesystem to crash.
+ * If anyone wants to figure out what part of the code
+ * refers to osb->journal before ocfs2_journal_init() is run,
+ * be my guest.
+ */
+ /* initialize our journal structure */
+
+ journal = kzalloc(sizeof(struct ocfs2_journal), GFP_KERNEL);
+ if (!journal) {
+ mlog(ML_ERROR, "unable to alloc journal\n");
+ status = -ENOMEM;
+ goto bail;
+ }
+ osb->journal = journal;
+ journal->j_osb = osb;
+
+ atomic_set(&journal->j_num_trans, 0);
+ init_rwsem(&journal->j_trans_barrier);
+ init_waitqueue_head(&journal->j_checkpointed);
+ spin_lock_init(&journal->j_lock);
+ journal->j_trans_id = (unsigned long) 1;
+ INIT_LIST_HEAD(&journal->j_la_cleanups);
+ INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery);
+ journal->j_state = OCFS2_JOURNAL_FREE;
+
+ INIT_WORK(&osb->dquot_drop_work, ocfs2_drop_dquot_refs);
+ init_llist_head(&osb->dquot_drop_list);
+
+ /* get some pseudo constants for clustersize bits */
+ osb->s_clustersize_bits =
+ le32_to_cpu(di->id2.i_super.s_clustersize_bits);
+ osb->s_clustersize = 1 << osb->s_clustersize_bits;
+
+ if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE ||
+ osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) {
+ mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n",
+ osb->s_clustersize);
+ status = -EINVAL;
+ goto bail;
+ }
+
+ total_blocks = ocfs2_clusters_to_blocks(osb->sb,
+ le32_to_cpu(di->i_clusters));
+
+ status = generic_check_addressable(osb->sb->s_blocksize_bits,
+ total_blocks);
+ if (status) {
+ mlog(ML_ERROR, "Volume too large "
+ "to mount safely on this system");
+ status = -EFBIG;
+ goto bail;
+ }
+
+ if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid,
+ sizeof(di->id2.i_super.s_uuid))) {
+ mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n");
+ status = -ENOMEM;
+ goto bail;
+ }
+
+ strlcpy(osb->vol_label, di->id2.i_super.s_label,
+ OCFS2_MAX_VOL_LABEL_LEN);
+ osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno);
+ osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno);
+ osb->first_cluster_group_blkno =
+ le64_to_cpu(di->id2.i_super.s_first_cluster_group);
+ osb->fs_generation = le32_to_cpu(di->i_fs_generation);
+ osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
+ trace_ocfs2_initialize_super(osb->vol_label, osb->uuid_str,
+ (unsigned long long)osb->root_blkno,
+ (unsigned long long)osb->system_dir_blkno,
+ osb->s_clustersize_bits);
+
+ osb->osb_dlm_debug = ocfs2_new_dlm_debug();
+ if (!osb->osb_dlm_debug) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ atomic_set(&osb->vol_state, VOLUME_INIT);
+
+ /* load root, system_dir, and all global system inodes */
+ status = ocfs2_init_global_system_inodes(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ /*
+ * global bitmap
+ */
+ inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE,
+ OCFS2_INVALID_SLOT);
+ if (!inode) {
+ status = -EINVAL;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno;
+ osb->osb_clusters_at_boot = OCFS2_I(inode)->ip_clusters;
+ iput(inode);
+
+ osb->bitmap_cpg = ocfs2_group_bitmap_size(sb, 0,
+ osb->s_feature_incompat) * 8;
+
+ status = ocfs2_init_slot_info(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+ cleancache_init_shared_fs(sb);
+
+bail:
+ return status;
+}
+
+/*
+ * will return: -EAGAIN if it is ok to keep searching for superblocks
+ * -EINVAL if there is a bad superblock
+ * 0 on success
+ */
+static int ocfs2_verify_volume(struct ocfs2_dinode *di,
+ struct buffer_head *bh,
+ u32 blksz,
+ struct ocfs2_blockcheck_stats *stats)
+{
+ int status = -EAGAIN;
+
+ if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE,
+ strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) {
+ /* We have to do a raw check of the feature here */
+ if (le32_to_cpu(di->id2.i_super.s_feature_incompat) &
+ OCFS2_FEATURE_INCOMPAT_META_ECC) {
+ status = ocfs2_block_check_validate(bh->b_data,
+ bh->b_size,
+ &di->i_check,
+ stats);
+ if (status)
+ goto out;
+ }
+ status = -EINVAL;
+ if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) {
+ mlog(ML_ERROR, "found superblock with incorrect block "
+ "size: found %u, should be %u\n",
+ 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits),
+ blksz);
+ } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) !=
+ OCFS2_MAJOR_REV_LEVEL ||
+ le16_to_cpu(di->id2.i_super.s_minor_rev_level) !=
+ OCFS2_MINOR_REV_LEVEL) {
+ mlog(ML_ERROR, "found superblock with bad version: "
+ "found %u.%u, should be %u.%u\n",
+ le16_to_cpu(di->id2.i_super.s_major_rev_level),
+ le16_to_cpu(di->id2.i_super.s_minor_rev_level),
+ OCFS2_MAJOR_REV_LEVEL,
+ OCFS2_MINOR_REV_LEVEL);
+ } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) {
+ mlog(ML_ERROR, "bad block number on superblock: "
+ "found %llu, should be %llu\n",
+ (unsigned long long)le64_to_cpu(di->i_blkno),
+ (unsigned long long)bh->b_blocknr);
+ } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 ||
+ le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) {
+ mlog(ML_ERROR, "bad cluster size found: %u\n",
+ 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits));
+ } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) {
+ mlog(ML_ERROR, "bad root_blkno: 0\n");
+ } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) {
+ mlog(ML_ERROR, "bad system_dir_blkno: 0\n");
+ } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) {
+ mlog(ML_ERROR,
+ "Superblock slots found greater than file system "
+ "maximum: found %u, max %u\n",
+ le16_to_cpu(di->id2.i_super.s_max_slots),
+ OCFS2_MAX_SLOTS);
+ } else {
+ /* found it! */
+ status = 0;
+ }
+ }
+
+out:
+ if (status && status != -EAGAIN)
+ mlog_errno(status);
+ return status;
+}
+
+static int ocfs2_check_volume(struct ocfs2_super *osb)
+{
+ int status;
+ int dirty;
+ int local;
+ struct ocfs2_dinode *local_alloc = NULL; /* only used if we
+ * recover
+ * ourselves. */
+
+ /* Init our journal object. */
+ status = ocfs2_journal_init(osb->journal, &dirty);
+ if (status < 0) {
+ mlog(ML_ERROR, "Could not initialize journal!\n");
+ goto finally;
+ }
+
+ /* Now that journal has been initialized, check to make sure
+ entire volume is addressable. */
+ status = ocfs2_journal_addressable(osb);
+ if (status)
+ goto finally;
+
+ /* If the journal was unmounted cleanly then we don't want to
+ * recover anything. Otherwise, journal_load will do that
+ * dirty work for us :) */
+ if (!dirty) {
+ status = ocfs2_journal_wipe(osb->journal, 0);
+ if (status < 0) {
+ mlog_errno(status);
+ goto finally;
+ }
+ } else {
+ printk(KERN_NOTICE "ocfs2: File system on device (%s) was not "
+ "unmounted cleanly, recovering it.\n", osb->dev_str);
+ }
+
+ local = ocfs2_mount_local(osb);
+
+ /* will play back anything left in the journal. */
+ status = ocfs2_journal_load(osb->journal, local, dirty);
+ if (status < 0) {
+ mlog(ML_ERROR, "ocfs2 journal load failed! %d\n", status);
+ goto finally;
+ }
+
+ if (osb->s_mount_opt & OCFS2_MOUNT_JOURNAL_ASYNC_COMMIT)
+ jbd2_journal_set_features(osb->journal->j_journal,
+ JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+ JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+ else
+ jbd2_journal_clear_features(osb->journal->j_journal,
+ JBD2_FEATURE_COMPAT_CHECKSUM, 0,
+ JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT);
+
+ if (dirty) {
+ /* recover my local alloc if we didn't unmount cleanly. */
+ status = ocfs2_begin_local_alloc_recovery(osb,
+ osb->slot_num,
+ &local_alloc);
+ if (status < 0) {
+ mlog_errno(status);
+ goto finally;
+ }
+ /* we complete the recovery process after we've marked
+ * ourselves as mounted. */
+ }
+
+ status = ocfs2_load_local_alloc(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto finally;
+ }
+
+ if (dirty) {
+ /* Recovery will be completed after we've mounted the
+ * rest of the volume. */
+ osb->dirty = 1;
+ osb->local_alloc_copy = local_alloc;
+ local_alloc = NULL;
+ }
+
+ /* go through each journal, trylock it and if you get the
+ * lock, and it's marked as dirty, set the bit in the recover
+ * map and launch a recovery thread for it. */
+ status = ocfs2_mark_dead_nodes(osb);
+ if (status < 0) {
+ mlog_errno(status);
+ goto finally;
+ }
+
+ status = ocfs2_compute_replay_slots(osb);
+ if (status < 0)
+ mlog_errno(status);
+
+finally:
+ kfree(local_alloc);
+
+ if (status)
+ mlog_errno(status);
+ return status;
+}
+
+/*
+ * The routine gets called from dismount or close whenever a dismount on
+ * volume is requested and the osb open count becomes 1.
+ * It will remove the osb from the global list and also free up all the
+ * initialized resources and fileobject.
+ */
+static void ocfs2_delete_osb(struct ocfs2_super *osb)
+{
+ /* This function assumes that the caller has the main osb resource */
+
+ ocfs2_free_slot_info(osb);
+
+ kfree(osb->osb_orphan_wipes);
+ kfree(osb->slot_recovery_generations);
+ /* FIXME
+ * This belongs in journal shutdown, but because we have to
+ * allocate osb->journal at the start of ocfs2_initialize_osb(),
+ * we free it here.
+ */
+ kfree(osb->journal);
+ kfree(osb->local_alloc_copy);
+ kfree(osb->uuid_str);
+ kfree(osb->vol_label);
+ ocfs2_put_dlm_debug(osb->osb_dlm_debug);
+ memset(osb, 0, sizeof(struct ocfs2_super));
+}
+
+/* Put OCFS2 into a readonly state, or (if the user specifies it),
+ * panic(). We do not support continue-on-error operation. */
+static void ocfs2_handle_error(struct super_block *sb)
+{
+ struct ocfs2_super *osb = OCFS2_SB(sb);
+
+ if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC)
+ panic("OCFS2: (device %s): panic forced after error\n",
+ sb->s_id);
+
+ ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS);
+
+ if (sb->s_flags & MS_RDONLY &&
+ (ocfs2_is_soft_readonly(osb) ||
+ ocfs2_is_hard_readonly(osb)))
+ return;
+
+ printk(KERN_CRIT "File system is now read-only due to the potential "
+ "of on-disk corruption. Please run fsck.ocfs2 once the file "
+ "system is unmounted.\n");
+ sb->s_flags |= MS_RDONLY;
+ ocfs2_set_ro_flag(osb, 0);
+}
+
+void __ocfs2_error(struct super_block *sb, const char *function,
+ const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start(args, fmt);
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ /* Not using mlog here because we want to show the actual
+ * function the error came from. */
+ printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %pV\n",
+ sb->s_id, function, &vaf);
+
+ va_end(args);
+
+ ocfs2_handle_error(sb);
+}
+
+/* Handle critical errors. This is intentionally more drastic than
+ * ocfs2_handle_error, so we only use for things like journal errors,
+ * etc. */
+void __ocfs2_abort(struct super_block *sb, const char *function,
+ const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ printk(KERN_CRIT "OCFS2: abort (device %s): %s: %pV\n",
+ sb->s_id, function, &vaf);
+
+ va_end(args);
+
+ /* We don't have the cluster support yet to go straight to
+ * hard readonly in here. Until then, we want to keep
+ * ocfs2_abort() so that we can at least mark critical
+ * errors.
+ *
+ * TODO: This should abort the journal and alert other nodes
+ * that our slot needs recovery. */
+
+ /* Force a panic(). This stinks, but it's better than letting
+ * things continue without having a proper hard readonly
+ * here. */
+ if (!ocfs2_mount_local(OCFS2_SB(sb)))
+ OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
+ ocfs2_handle_error(sb);
+}
+
+/*
+ * Void signal blockers, because in-kernel sigprocmask() only fails
+ * when SIG_* is wrong.
+ */
+void ocfs2_block_signals(sigset_t *oldset)
+{
+ int rc;
+ sigset_t blocked;
+
+ sigfillset(&blocked);
+ rc = sigprocmask(SIG_BLOCK, &blocked, oldset);
+ BUG_ON(rc);
+}
+
+void ocfs2_unblock_signals(sigset_t *oldset)
+{
+ int rc = sigprocmask(SIG_SETMASK, oldset, NULL);
+ BUG_ON(rc);
+}
+
+module_init(ocfs2_init);
+module_exit(ocfs2_exit);