diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ocfs2/super.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/ocfs2/super.c | 2655 |
1 files changed, 0 insertions, 2655 deletions
diff --git a/ANDROID_3.4.5/fs/ocfs2/super.c b/ANDROID_3.4.5/fs/ocfs2/super.c deleted file mode 100644 index 68f4541c..00000000 --- a/ANDROID_3.4.5/fs/ocfs2/super.c +++ /dev/null @@ -1,2655 +0,0 @@ -/* -*- 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 "ver.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 = NULL; -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 = NULL; - -MODULE_AUTHOR("Oracle"); -MODULE_LICENSE("GPL"); - -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 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, -}; - -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_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_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 Needs: %d\n", "Commit", - (osb->commit_task ? task_pid_nr(osb->commit_task) : -1), - osb->osb_commit_interval, - atomic_read(&osb->needs_checkpoint)); - - 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; - - 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; - - 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[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, - OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; - int status = 0; - - for (type = 0; type < 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[MAXQUOTAS] = { NULL, NULL }; - struct super_block *sb = osb->sb; - unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, - OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; - unsigned int ino[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 < 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 < MAXQUOTAS; type++) - iput(inode[type]); - return 0; -out_quota_off: - ocfs2_disable_quotas(osb); - for (type = 0; type < 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 < 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); - } -} - -/* Handle quota on quotactl */ -static int ocfs2_quota_on(struct super_block *sb, int type, int format_id) -{ - unsigned int feature[MAXQUOTAS] = { OCFS2_FEATURE_RO_COMPAT_USRQUOTA, - OCFS2_FEATURE_RO_COMPAT_GRPQUOTA}; - - if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type])) - return -EINVAL; - - return dquot_enable(sb_dqopt(sb)->files[type], type, - format_id, DQUOT_LIMITS_ENABLED); -} - -/* Handle quota off quotactl */ -static int ocfs2_quota_off(struct super_block *sb, int type) -{ - return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); -} - -static const struct quotactl_ops ocfs2_quotactl_ops = { - .quota_on_meta = ocfs2_quota_on, - .quota_off = ocfs2_quota_off, - .quota_sync = dquot_quota_sync, - .get_info = dquot_get_dqinfo, - .set_info = dquot_set_dqinfo, - .get_dqblk = dquot_get_dqblk, - .set_dqblk = dquot_set_dqblk, -}; - -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[8]; - 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, §or_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 void ocfs2_kill_sb(struct super_block *sb) -{ - struct ocfs2_super *osb = OCFS2_SB(sb); - - /* Failed mount? */ - if (!osb || atomic_read(&osb->vol_state) == VOLUME_DISABLED) - goto out; - - /* Prevent further queueing of inode drop events */ - spin_lock(&dentry_list_lock); - ocfs2_set_osb_flag(osb, OCFS2_OSB_DROP_DENTRY_LOCK_IMMED); - spin_unlock(&dentry_list_lock); - /* Wait for work to finish and/or remove it */ - cancel_work_sync(&osb->dentry_lock_work); -out: - kill_block_super(sb); -} - -static struct file_system_type ocfs2_fs_type = { - .owner = THIS_MODULE, - .name = "ocfs2", - .mount = ocfs2_mount, - .kill_sb = ocfs2_kill_sb, - - .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, - .next = NULL -}; - -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; - 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); - - return 0; -} - -wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; - -static int __init ocfs2_init(void) -{ - int status, i; - - ocfs2_print_version(); - - for (i = 0; i < OCFS2_IOEND_WQ_HASH_SZ; i++) - init_waitqueue_head(&ocfs2__ioend_wq[i]); - - 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 = -EFAULT; - mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); - } - - 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; - atomic_set(&oi->ip_unaligned_aio, 0); - 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); - - 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) -{ - 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(-EIO); - return -EIO; - } - 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[8]; - - trace_ocfs2_dismount_volume(sb); - - BUG_ON(!sb); - osb = OCFS2_SB(sb); - BUG_ON(!osb); - - debugfs_remove(osb->osb_ctxt); - - /* - * Flush inode dropping work queue so that deletes are - * performed while the filesystem is still working - */ - ocfs2_drop_all_dl_inodes(osb); - - /* Orphan scan should be stopped as early as possible */ - ocfs2_orphan_scan_stop(osb); - - ocfs2_disable_quotas(osb); - - 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; - __le32 uuid_net_key; - 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 = &ocfs2_quotactl_ops; - sb->dq_op = &ocfs2_quota_operations; - 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); - - 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); - - 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); - atomic_set(&osb->needs_checkpoint, 0); - - 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; - memcpy(osb->osb_cluster_stack, - OCFS2_RAW_SB(di)->s_cluster_info.ci_stack, - OCFS2_STACK_LABEL_LEN); - osb->osb_cluster_stack[OCFS2_STACK_LABEL_LEN] = '\0'; - 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; - } - } 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->dentry_lock_work, ocfs2_drop_dl_inodes); - osb->dentry_lock_list = NULL; - - /* 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; - } - - memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); - - strncpy(osb->vol_label, di->id2.i_super.s_label, 63); - osb->vol_label[63] = '\0'; - 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((char *)&di->id2.i_super.s_uuid, 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 (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: - if (local_alloc) - 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); - if (osb->local_alloc_copy) - kfree(osb->local_alloc_copy); - kfree(osb->uuid_str); - 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); -} - -static char error_buf[1024]; - -void __ocfs2_error(struct super_block *sb, - const char *function, - const char *fmt, ...) -{ - va_list args; - - va_start(args, fmt); - vsnprintf(error_buf, sizeof(error_buf), fmt, args); - va_end(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: %s\n", - sb->s_id, function, error_buf); - - 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, ...) -{ - va_list args; - - va_start(args, fmt); - vsnprintf(error_buf, sizeof(error_buf), fmt, args); - va_end(args); - - printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", - sb->s_id, function, error_buf); - - /* 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); |