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2373 lines
62 KiB
2373 lines
62 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* journal.c |
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* |
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* Defines functions of journalling api |
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* |
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* Copyright (C) 2003, 2004 Oracle. All rights reserved. |
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*/ |
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|
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#include <linux/fs.h> |
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#include <linux/types.h> |
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#include <linux/slab.h> |
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#include <linux/highmem.h> |
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#include <linux/kthread.h> |
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#include <linux/time.h> |
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#include <linux/random.h> |
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#include <linux/delay.h> |
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|
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#include <cluster/masklog.h> |
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|
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#include "ocfs2.h" |
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|
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#include "alloc.h" |
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#include "blockcheck.h" |
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#include "dir.h" |
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#include "dlmglue.h" |
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#include "extent_map.h" |
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#include "heartbeat.h" |
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#include "inode.h" |
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#include "journal.h" |
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#include "localalloc.h" |
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#include "slot_map.h" |
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#include "super.h" |
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#include "sysfile.h" |
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#include "uptodate.h" |
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#include "quota.h" |
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#include "file.h" |
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#include "namei.h" |
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|
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#include "buffer_head_io.h" |
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#include "ocfs2_trace.h" |
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|
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DEFINE_SPINLOCK(trans_inc_lock); |
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|
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#define ORPHAN_SCAN_SCHEDULE_TIMEOUT 300000 |
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|
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static int ocfs2_force_read_journal(struct inode *inode); |
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static int ocfs2_recover_node(struct ocfs2_super *osb, |
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int node_num, int slot_num); |
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static int __ocfs2_recovery_thread(void *arg); |
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static int ocfs2_commit_cache(struct ocfs2_super *osb); |
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static int __ocfs2_wait_on_mount(struct ocfs2_super *osb, int quota); |
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static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, |
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int dirty, int replayed); |
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static int ocfs2_trylock_journal(struct ocfs2_super *osb, |
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int slot_num); |
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static int ocfs2_recover_orphans(struct ocfs2_super *osb, |
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int slot, |
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enum ocfs2_orphan_reco_type orphan_reco_type); |
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static int ocfs2_commit_thread(void *arg); |
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static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal, |
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int slot_num, |
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struct ocfs2_dinode *la_dinode, |
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struct ocfs2_dinode *tl_dinode, |
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struct ocfs2_quota_recovery *qrec, |
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enum ocfs2_orphan_reco_type orphan_reco_type); |
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|
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static inline int ocfs2_wait_on_mount(struct ocfs2_super *osb) |
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{ |
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return __ocfs2_wait_on_mount(osb, 0); |
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} |
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|
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static inline int ocfs2_wait_on_quotas(struct ocfs2_super *osb) |
|
{ |
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return __ocfs2_wait_on_mount(osb, 1); |
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} |
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|
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/* |
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* This replay_map is to track online/offline slots, so we could recover |
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* offline slots during recovery and mount |
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*/ |
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|
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enum ocfs2_replay_state { |
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REPLAY_UNNEEDED = 0, /* Replay is not needed, so ignore this map */ |
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REPLAY_NEEDED, /* Replay slots marked in rm_replay_slots */ |
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REPLAY_DONE /* Replay was already queued */ |
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}; |
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|
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struct ocfs2_replay_map { |
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unsigned int rm_slots; |
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enum ocfs2_replay_state rm_state; |
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unsigned char rm_replay_slots[]; |
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}; |
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|
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static void ocfs2_replay_map_set_state(struct ocfs2_super *osb, int state) |
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{ |
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if (!osb->replay_map) |
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return; |
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|
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/* If we've already queued the replay, we don't have any more to do */ |
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if (osb->replay_map->rm_state == REPLAY_DONE) |
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return; |
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|
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osb->replay_map->rm_state = state; |
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} |
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|
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int ocfs2_compute_replay_slots(struct ocfs2_super *osb) |
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{ |
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struct ocfs2_replay_map *replay_map; |
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int i, node_num; |
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|
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/* If replay map is already set, we don't do it again */ |
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if (osb->replay_map) |
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return 0; |
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replay_map = kzalloc(sizeof(struct ocfs2_replay_map) + |
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(osb->max_slots * sizeof(char)), GFP_KERNEL); |
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|
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if (!replay_map) { |
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mlog_errno(-ENOMEM); |
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return -ENOMEM; |
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} |
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|
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spin_lock(&osb->osb_lock); |
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|
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replay_map->rm_slots = osb->max_slots; |
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replay_map->rm_state = REPLAY_UNNEEDED; |
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|
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/* set rm_replay_slots for offline slot(s) */ |
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for (i = 0; i < replay_map->rm_slots; i++) { |
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if (ocfs2_slot_to_node_num_locked(osb, i, &node_num) == -ENOENT) |
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replay_map->rm_replay_slots[i] = 1; |
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} |
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|
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osb->replay_map = replay_map; |
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spin_unlock(&osb->osb_lock); |
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return 0; |
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} |
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|
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static void ocfs2_queue_replay_slots(struct ocfs2_super *osb, |
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enum ocfs2_orphan_reco_type orphan_reco_type) |
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{ |
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struct ocfs2_replay_map *replay_map = osb->replay_map; |
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int i; |
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|
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if (!replay_map) |
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return; |
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|
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if (replay_map->rm_state != REPLAY_NEEDED) |
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return; |
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|
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for (i = 0; i < replay_map->rm_slots; i++) |
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if (replay_map->rm_replay_slots[i]) |
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ocfs2_queue_recovery_completion(osb->journal, i, NULL, |
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NULL, NULL, |
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orphan_reco_type); |
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replay_map->rm_state = REPLAY_DONE; |
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} |
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|
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static void ocfs2_free_replay_slots(struct ocfs2_super *osb) |
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{ |
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struct ocfs2_replay_map *replay_map = osb->replay_map; |
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|
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if (!osb->replay_map) |
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return; |
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|
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kfree(replay_map); |
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osb->replay_map = NULL; |
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} |
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|
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int ocfs2_recovery_init(struct ocfs2_super *osb) |
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{ |
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struct ocfs2_recovery_map *rm; |
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|
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mutex_init(&osb->recovery_lock); |
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osb->disable_recovery = 0; |
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osb->recovery_thread_task = NULL; |
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init_waitqueue_head(&osb->recovery_event); |
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|
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rm = kzalloc(sizeof(struct ocfs2_recovery_map) + |
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osb->max_slots * sizeof(unsigned int), |
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GFP_KERNEL); |
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if (!rm) { |
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mlog_errno(-ENOMEM); |
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return -ENOMEM; |
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} |
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|
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rm->rm_entries = (unsigned int *)((char *)rm + |
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sizeof(struct ocfs2_recovery_map)); |
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osb->recovery_map = rm; |
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|
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return 0; |
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} |
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|
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/* we can't grab the goofy sem lock from inside wait_event, so we use |
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* memory barriers to make sure that we'll see the null task before |
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* being woken up */ |
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static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) |
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{ |
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mb(); |
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return osb->recovery_thread_task != NULL; |
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} |
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|
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void ocfs2_recovery_exit(struct ocfs2_super *osb) |
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{ |
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struct ocfs2_recovery_map *rm; |
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|
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/* disable any new recovery threads and wait for any currently |
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* running ones to exit. Do this before setting the vol_state. */ |
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mutex_lock(&osb->recovery_lock); |
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osb->disable_recovery = 1; |
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mutex_unlock(&osb->recovery_lock); |
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wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); |
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|
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/* At this point, we know that no more recovery threads can be |
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* launched, so wait for any recovery completion work to |
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* complete. */ |
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if (osb->ocfs2_wq) |
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flush_workqueue(osb->ocfs2_wq); |
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|
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/* |
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* Now that recovery is shut down, and the osb is about to be |
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* freed, the osb_lock is not taken here. |
|
*/ |
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rm = osb->recovery_map; |
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/* XXX: Should we bug if there are dirty entries? */ |
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|
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kfree(rm); |
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} |
|
|
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static int __ocfs2_recovery_map_test(struct ocfs2_super *osb, |
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unsigned int node_num) |
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{ |
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int i; |
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struct ocfs2_recovery_map *rm = osb->recovery_map; |
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|
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assert_spin_locked(&osb->osb_lock); |
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|
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for (i = 0; i < rm->rm_used; i++) { |
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if (rm->rm_entries[i] == node_num) |
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return 1; |
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} |
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|
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return 0; |
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} |
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|
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/* Behaves like test-and-set. Returns the previous value */ |
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static int ocfs2_recovery_map_set(struct ocfs2_super *osb, |
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unsigned int node_num) |
|
{ |
|
struct ocfs2_recovery_map *rm = osb->recovery_map; |
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|
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spin_lock(&osb->osb_lock); |
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if (__ocfs2_recovery_map_test(osb, node_num)) { |
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spin_unlock(&osb->osb_lock); |
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return 1; |
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} |
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|
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/* XXX: Can this be exploited? Not from o2dlm... */ |
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BUG_ON(rm->rm_used >= osb->max_slots); |
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rm->rm_entries[rm->rm_used] = node_num; |
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rm->rm_used++; |
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spin_unlock(&osb->osb_lock); |
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|
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return 0; |
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} |
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|
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static void ocfs2_recovery_map_clear(struct ocfs2_super *osb, |
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unsigned int node_num) |
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{ |
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int i; |
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struct ocfs2_recovery_map *rm = osb->recovery_map; |
|
|
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spin_lock(&osb->osb_lock); |
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|
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for (i = 0; i < rm->rm_used; i++) { |
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if (rm->rm_entries[i] == node_num) |
|
break; |
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} |
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|
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if (i < rm->rm_used) { |
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/* XXX: be careful with the pointer math */ |
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memmove(&(rm->rm_entries[i]), &(rm->rm_entries[i + 1]), |
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(rm->rm_used - i - 1) * sizeof(unsigned int)); |
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rm->rm_used--; |
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} |
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|
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spin_unlock(&osb->osb_lock); |
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} |
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|
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static int ocfs2_commit_cache(struct ocfs2_super *osb) |
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{ |
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int status = 0; |
|
unsigned int flushed; |
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struct ocfs2_journal *journal = NULL; |
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|
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journal = osb->journal; |
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|
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/* Flush all pending commits and checkpoint the journal. */ |
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down_write(&journal->j_trans_barrier); |
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|
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flushed = atomic_read(&journal->j_num_trans); |
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trace_ocfs2_commit_cache_begin(flushed); |
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if (flushed == 0) { |
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up_write(&journal->j_trans_barrier); |
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goto finally; |
|
} |
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|
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jbd2_journal_lock_updates(journal->j_journal); |
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status = jbd2_journal_flush(journal->j_journal, 0); |
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jbd2_journal_unlock_updates(journal->j_journal); |
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if (status < 0) { |
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up_write(&journal->j_trans_barrier); |
|
mlog_errno(status); |
|
goto finally; |
|
} |
|
|
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ocfs2_inc_trans_id(journal); |
|
|
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flushed = atomic_read(&journal->j_num_trans); |
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atomic_set(&journal->j_num_trans, 0); |
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up_write(&journal->j_trans_barrier); |
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|
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trace_ocfs2_commit_cache_end(journal->j_trans_id, flushed); |
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|
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ocfs2_wake_downconvert_thread(osb); |
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wake_up(&journal->j_checkpointed); |
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finally: |
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return status; |
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} |
|
|
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handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs) |
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{ |
|
journal_t *journal = osb->journal->j_journal; |
|
handle_t *handle; |
|
|
|
BUG_ON(!osb || !osb->journal->j_journal); |
|
|
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if (ocfs2_is_hard_readonly(osb)) |
|
return ERR_PTR(-EROFS); |
|
|
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BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE); |
|
BUG_ON(max_buffs <= 0); |
|
|
|
/* Nested transaction? Just return the handle... */ |
|
if (journal_current_handle()) |
|
return jbd2_journal_start(journal, max_buffs); |
|
|
|
sb_start_intwrite(osb->sb); |
|
|
|
down_read(&osb->journal->j_trans_barrier); |
|
|
|
handle = jbd2_journal_start(journal, max_buffs); |
|
if (IS_ERR(handle)) { |
|
up_read(&osb->journal->j_trans_barrier); |
|
sb_end_intwrite(osb->sb); |
|
|
|
mlog_errno(PTR_ERR(handle)); |
|
|
|
if (is_journal_aborted(journal)) { |
|
ocfs2_abort(osb->sb, "Detected aborted journal\n"); |
|
handle = ERR_PTR(-EROFS); |
|
} |
|
} else { |
|
if (!ocfs2_mount_local(osb)) |
|
atomic_inc(&(osb->journal->j_num_trans)); |
|
} |
|
|
|
return handle; |
|
} |
|
|
|
int ocfs2_commit_trans(struct ocfs2_super *osb, |
|
handle_t *handle) |
|
{ |
|
int ret, nested; |
|
struct ocfs2_journal *journal = osb->journal; |
|
|
|
BUG_ON(!handle); |
|
|
|
nested = handle->h_ref > 1; |
|
ret = jbd2_journal_stop(handle); |
|
if (ret < 0) |
|
mlog_errno(ret); |
|
|
|
if (!nested) { |
|
up_read(&journal->j_trans_barrier); |
|
sb_end_intwrite(osb->sb); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* 'nblocks' is what you want to add to the current transaction. |
|
* |
|
* This might call jbd2_journal_restart() which will commit dirty buffers |
|
* and then restart the transaction. Before calling |
|
* ocfs2_extend_trans(), any changed blocks should have been |
|
* dirtied. After calling it, all blocks which need to be changed must |
|
* go through another set of journal_access/journal_dirty calls. |
|
* |
|
* WARNING: This will not release any semaphores or disk locks taken |
|
* during the transaction, so make sure they were taken *before* |
|
* start_trans or we'll have ordering deadlocks. |
|
* |
|
* WARNING2: Note that we do *not* drop j_trans_barrier here. This is |
|
* good because transaction ids haven't yet been recorded on the |
|
* cluster locks associated with this handle. |
|
*/ |
|
int ocfs2_extend_trans(handle_t *handle, int nblocks) |
|
{ |
|
int status, old_nblocks; |
|
|
|
BUG_ON(!handle); |
|
BUG_ON(nblocks < 0); |
|
|
|
if (!nblocks) |
|
return 0; |
|
|
|
old_nblocks = jbd2_handle_buffer_credits(handle); |
|
|
|
trace_ocfs2_extend_trans(old_nblocks, nblocks); |
|
|
|
#ifdef CONFIG_OCFS2_DEBUG_FS |
|
status = 1; |
|
#else |
|
status = jbd2_journal_extend(handle, nblocks, 0); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
#endif |
|
|
|
if (status > 0) { |
|
trace_ocfs2_extend_trans_restart(old_nblocks + nblocks); |
|
status = jbd2_journal_restart(handle, |
|
old_nblocks + nblocks); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
} |
|
|
|
status = 0; |
|
bail: |
|
return status; |
|
} |
|
|
|
/* |
|
* If we have fewer than thresh credits, extend by OCFS2_MAX_TRANS_DATA. |
|
* If that fails, restart the transaction & regain write access for the |
|
* buffer head which is used for metadata modifications. |
|
* Taken from Ext4: extend_or_restart_transaction() |
|
*/ |
|
int ocfs2_allocate_extend_trans(handle_t *handle, int thresh) |
|
{ |
|
int status, old_nblks; |
|
|
|
BUG_ON(!handle); |
|
|
|
old_nblks = jbd2_handle_buffer_credits(handle); |
|
trace_ocfs2_allocate_extend_trans(old_nblks, thresh); |
|
|
|
if (old_nblks < thresh) |
|
return 0; |
|
|
|
status = jbd2_journal_extend(handle, OCFS2_MAX_TRANS_DATA, 0); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
|
|
if (status > 0) { |
|
status = jbd2_journal_restart(handle, OCFS2_MAX_TRANS_DATA); |
|
if (status < 0) |
|
mlog_errno(status); |
|
} |
|
|
|
bail: |
|
return status; |
|
} |
|
|
|
|
|
struct ocfs2_triggers { |
|
struct jbd2_buffer_trigger_type ot_triggers; |
|
int ot_offset; |
|
}; |
|
|
|
static inline struct ocfs2_triggers *to_ocfs2_trigger(struct jbd2_buffer_trigger_type *triggers) |
|
{ |
|
return container_of(triggers, struct ocfs2_triggers, ot_triggers); |
|
} |
|
|
|
static void ocfs2_frozen_trigger(struct jbd2_buffer_trigger_type *triggers, |
|
struct buffer_head *bh, |
|
void *data, size_t size) |
|
{ |
|
struct ocfs2_triggers *ot = to_ocfs2_trigger(triggers); |
|
|
|
/* |
|
* We aren't guaranteed to have the superblock here, so we |
|
* must unconditionally compute the ecc data. |
|
* __ocfs2_journal_access() will only set the triggers if |
|
* metaecc is enabled. |
|
*/ |
|
ocfs2_block_check_compute(data, size, data + ot->ot_offset); |
|
} |
|
|
|
/* |
|
* Quota blocks have their own trigger because the struct ocfs2_block_check |
|
* offset depends on the blocksize. |
|
*/ |
|
static void ocfs2_dq_frozen_trigger(struct jbd2_buffer_trigger_type *triggers, |
|
struct buffer_head *bh, |
|
void *data, size_t size) |
|
{ |
|
struct ocfs2_disk_dqtrailer *dqt = |
|
ocfs2_block_dqtrailer(size, data); |
|
|
|
/* |
|
* We aren't guaranteed to have the superblock here, so we |
|
* must unconditionally compute the ecc data. |
|
* __ocfs2_journal_access() will only set the triggers if |
|
* metaecc is enabled. |
|
*/ |
|
ocfs2_block_check_compute(data, size, &dqt->dq_check); |
|
} |
|
|
|
/* |
|
* Directory blocks also have their own trigger because the |
|
* struct ocfs2_block_check offset depends on the blocksize. |
|
*/ |
|
static void ocfs2_db_frozen_trigger(struct jbd2_buffer_trigger_type *triggers, |
|
struct buffer_head *bh, |
|
void *data, size_t size) |
|
{ |
|
struct ocfs2_dir_block_trailer *trailer = |
|
ocfs2_dir_trailer_from_size(size, data); |
|
|
|
/* |
|
* We aren't guaranteed to have the superblock here, so we |
|
* must unconditionally compute the ecc data. |
|
* __ocfs2_journal_access() will only set the triggers if |
|
* metaecc is enabled. |
|
*/ |
|
ocfs2_block_check_compute(data, size, &trailer->db_check); |
|
} |
|
|
|
static void ocfs2_abort_trigger(struct jbd2_buffer_trigger_type *triggers, |
|
struct buffer_head *bh) |
|
{ |
|
mlog(ML_ERROR, |
|
"ocfs2_abort_trigger called by JBD2. bh = 0x%lx, " |
|
"bh->b_blocknr = %llu\n", |
|
(unsigned long)bh, |
|
(unsigned long long)bh->b_blocknr); |
|
|
|
ocfs2_error(bh->b_bdev->bd_super, |
|
"JBD2 has aborted our journal, ocfs2 cannot continue\n"); |
|
} |
|
|
|
static struct ocfs2_triggers di_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
.ot_offset = offsetof(struct ocfs2_dinode, i_check), |
|
}; |
|
|
|
static struct ocfs2_triggers eb_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
.ot_offset = offsetof(struct ocfs2_extent_block, h_check), |
|
}; |
|
|
|
static struct ocfs2_triggers rb_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
.ot_offset = offsetof(struct ocfs2_refcount_block, rf_check), |
|
}; |
|
|
|
static struct ocfs2_triggers gd_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
.ot_offset = offsetof(struct ocfs2_group_desc, bg_check), |
|
}; |
|
|
|
static struct ocfs2_triggers db_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_db_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
}; |
|
|
|
static struct ocfs2_triggers xb_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
.ot_offset = offsetof(struct ocfs2_xattr_block, xb_check), |
|
}; |
|
|
|
static struct ocfs2_triggers dq_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_dq_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
}; |
|
|
|
static struct ocfs2_triggers dr_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
.ot_offset = offsetof(struct ocfs2_dx_root_block, dr_check), |
|
}; |
|
|
|
static struct ocfs2_triggers dl_triggers = { |
|
.ot_triggers = { |
|
.t_frozen = ocfs2_frozen_trigger, |
|
.t_abort = ocfs2_abort_trigger, |
|
}, |
|
.ot_offset = offsetof(struct ocfs2_dx_leaf, dl_check), |
|
}; |
|
|
|
static int __ocfs2_journal_access(handle_t *handle, |
|
struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, |
|
struct ocfs2_triggers *triggers, |
|
int type) |
|
{ |
|
int status; |
|
struct ocfs2_super *osb = |
|
OCFS2_SB(ocfs2_metadata_cache_get_super(ci)); |
|
|
|
BUG_ON(!ci || !ci->ci_ops); |
|
BUG_ON(!handle); |
|
BUG_ON(!bh); |
|
|
|
trace_ocfs2_journal_access( |
|
(unsigned long long)ocfs2_metadata_cache_owner(ci), |
|
(unsigned long long)bh->b_blocknr, type, bh->b_size); |
|
|
|
/* we can safely remove this assertion after testing. */ |
|
if (!buffer_uptodate(bh)) { |
|
mlog(ML_ERROR, "giving me a buffer that's not uptodate!\n"); |
|
mlog(ML_ERROR, "b_blocknr=%llu, b_state=0x%lx\n", |
|
(unsigned long long)bh->b_blocknr, bh->b_state); |
|
|
|
lock_buffer(bh); |
|
/* |
|
* A previous transaction with a couple of buffer heads fail |
|
* to checkpoint, so all the bhs are marked as BH_Write_EIO. |
|
* For current transaction, the bh is just among those error |
|
* bhs which previous transaction handle. We can't just clear |
|
* its BH_Write_EIO and reuse directly, since other bhs are |
|
* not written to disk yet and that will cause metadata |
|
* inconsistency. So we should set fs read-only to avoid |
|
* further damage. |
|
*/ |
|
if (buffer_write_io_error(bh) && !buffer_uptodate(bh)) { |
|
unlock_buffer(bh); |
|
return ocfs2_error(osb->sb, "A previous attempt to " |
|
"write this buffer head failed\n"); |
|
} |
|
unlock_buffer(bh); |
|
} |
|
|
|
/* Set the current transaction information on the ci so |
|
* that the locking code knows whether it can drop it's locks |
|
* on this ci or not. We're protected from the commit |
|
* thread updating the current transaction id until |
|
* ocfs2_commit_trans() because ocfs2_start_trans() took |
|
* j_trans_barrier for us. */ |
|
ocfs2_set_ci_lock_trans(osb->journal, ci); |
|
|
|
ocfs2_metadata_cache_io_lock(ci); |
|
switch (type) { |
|
case OCFS2_JOURNAL_ACCESS_CREATE: |
|
case OCFS2_JOURNAL_ACCESS_WRITE: |
|
status = jbd2_journal_get_write_access(handle, bh); |
|
break; |
|
|
|
case OCFS2_JOURNAL_ACCESS_UNDO: |
|
status = jbd2_journal_get_undo_access(handle, bh); |
|
break; |
|
|
|
default: |
|
status = -EINVAL; |
|
mlog(ML_ERROR, "Unknown access type!\n"); |
|
} |
|
if (!status && ocfs2_meta_ecc(osb) && triggers) |
|
jbd2_journal_set_triggers(bh, &triggers->ot_triggers); |
|
ocfs2_metadata_cache_io_unlock(ci); |
|
|
|
if (status < 0) |
|
mlog(ML_ERROR, "Error %d getting %d access to buffer!\n", |
|
status, type); |
|
|
|
return status; |
|
} |
|
|
|
int ocfs2_journal_access_di(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &di_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access_eb(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &eb_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access_rb(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &rb_triggers, |
|
type); |
|
} |
|
|
|
int ocfs2_journal_access_gd(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &gd_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access_db(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &db_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access_xb(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &xb_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access_dq(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &dq_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access_dr(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &dr_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access_dl(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, &dl_triggers, type); |
|
} |
|
|
|
int ocfs2_journal_access(handle_t *handle, struct ocfs2_caching_info *ci, |
|
struct buffer_head *bh, int type) |
|
{ |
|
return __ocfs2_journal_access(handle, ci, bh, NULL, type); |
|
} |
|
|
|
void ocfs2_journal_dirty(handle_t *handle, struct buffer_head *bh) |
|
{ |
|
int status; |
|
|
|
trace_ocfs2_journal_dirty((unsigned long long)bh->b_blocknr); |
|
|
|
status = jbd2_journal_dirty_metadata(handle, bh); |
|
if (status) { |
|
mlog_errno(status); |
|
if (!is_handle_aborted(handle)) { |
|
journal_t *journal = handle->h_transaction->t_journal; |
|
struct super_block *sb = bh->b_bdev->bd_super; |
|
|
|
mlog(ML_ERROR, "jbd2_journal_dirty_metadata failed. " |
|
"Aborting transaction and journal.\n"); |
|
handle->h_err = status; |
|
jbd2_journal_abort_handle(handle); |
|
jbd2_journal_abort(journal, status); |
|
ocfs2_abort(sb, "Journal already aborted.\n"); |
|
} |
|
} |
|
} |
|
|
|
#define OCFS2_DEFAULT_COMMIT_INTERVAL (HZ * JBD2_DEFAULT_MAX_COMMIT_AGE) |
|
|
|
void ocfs2_set_journal_params(struct ocfs2_super *osb) |
|
{ |
|
journal_t *journal = osb->journal->j_journal; |
|
unsigned long commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL; |
|
|
|
if (osb->osb_commit_interval) |
|
commit_interval = osb->osb_commit_interval; |
|
|
|
write_lock(&journal->j_state_lock); |
|
journal->j_commit_interval = commit_interval; |
|
if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) |
|
journal->j_flags |= JBD2_BARRIER; |
|
else |
|
journal->j_flags &= ~JBD2_BARRIER; |
|
write_unlock(&journal->j_state_lock); |
|
} |
|
|
|
int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty) |
|
{ |
|
int status = -1; |
|
struct inode *inode = NULL; /* the journal inode */ |
|
journal_t *j_journal = NULL; |
|
struct ocfs2_dinode *di = NULL; |
|
struct buffer_head *bh = NULL; |
|
struct ocfs2_super *osb; |
|
int inode_lock = 0; |
|
|
|
BUG_ON(!journal); |
|
|
|
osb = journal->j_osb; |
|
|
|
/* already have the inode for our journal */ |
|
inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
|
osb->slot_num); |
|
if (inode == NULL) { |
|
status = -EACCES; |
|
mlog_errno(status); |
|
goto done; |
|
} |
|
if (is_bad_inode(inode)) { |
|
mlog(ML_ERROR, "access error (bad inode)\n"); |
|
iput(inode); |
|
inode = NULL; |
|
status = -EACCES; |
|
goto done; |
|
} |
|
|
|
SET_INODE_JOURNAL(inode); |
|
OCFS2_I(inode)->ip_open_count++; |
|
|
|
/* Skip recovery waits here - journal inode metadata never |
|
* changes in a live cluster so it can be considered an |
|
* exception to the rule. */ |
|
status = ocfs2_inode_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY); |
|
if (status < 0) { |
|
if (status != -ERESTARTSYS) |
|
mlog(ML_ERROR, "Could not get lock on journal!\n"); |
|
goto done; |
|
} |
|
|
|
inode_lock = 1; |
|
di = (struct ocfs2_dinode *)bh->b_data; |
|
|
|
if (i_size_read(inode) < OCFS2_MIN_JOURNAL_SIZE) { |
|
mlog(ML_ERROR, "Journal file size (%lld) is too small!\n", |
|
i_size_read(inode)); |
|
status = -EINVAL; |
|
goto done; |
|
} |
|
|
|
trace_ocfs2_journal_init(i_size_read(inode), |
|
(unsigned long long)inode->i_blocks, |
|
OCFS2_I(inode)->ip_clusters); |
|
|
|
/* call the kernels journal init function now */ |
|
j_journal = jbd2_journal_init_inode(inode); |
|
if (j_journal == NULL) { |
|
mlog(ML_ERROR, "Linux journal layer error\n"); |
|
status = -EINVAL; |
|
goto done; |
|
} |
|
|
|
trace_ocfs2_journal_init_maxlen(j_journal->j_total_len); |
|
|
|
*dirty = (le32_to_cpu(di->id1.journal1.ij_flags) & |
|
OCFS2_JOURNAL_DIRTY_FL); |
|
|
|
journal->j_journal = j_journal; |
|
journal->j_journal->j_submit_inode_data_buffers = |
|
jbd2_journal_submit_inode_data_buffers; |
|
journal->j_journal->j_finish_inode_data_buffers = |
|
jbd2_journal_finish_inode_data_buffers; |
|
journal->j_inode = inode; |
|
journal->j_bh = bh; |
|
|
|
ocfs2_set_journal_params(osb); |
|
|
|
journal->j_state = OCFS2_JOURNAL_LOADED; |
|
|
|
status = 0; |
|
done: |
|
if (status < 0) { |
|
if (inode_lock) |
|
ocfs2_inode_unlock(inode, 1); |
|
brelse(bh); |
|
if (inode) { |
|
OCFS2_I(inode)->ip_open_count--; |
|
iput(inode); |
|
} |
|
} |
|
|
|
return status; |
|
} |
|
|
|
static void ocfs2_bump_recovery_generation(struct ocfs2_dinode *di) |
|
{ |
|
le32_add_cpu(&(di->id1.journal1.ij_recovery_generation), 1); |
|
} |
|
|
|
static u32 ocfs2_get_recovery_generation(struct ocfs2_dinode *di) |
|
{ |
|
return le32_to_cpu(di->id1.journal1.ij_recovery_generation); |
|
} |
|
|
|
static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, |
|
int dirty, int replayed) |
|
{ |
|
int status; |
|
unsigned int flags; |
|
struct ocfs2_journal *journal = osb->journal; |
|
struct buffer_head *bh = journal->j_bh; |
|
struct ocfs2_dinode *fe; |
|
|
|
fe = (struct ocfs2_dinode *)bh->b_data; |
|
|
|
/* The journal bh on the osb always comes from ocfs2_journal_init() |
|
* and was validated there inside ocfs2_inode_lock_full(). It's a |
|
* code bug if we mess it up. */ |
|
BUG_ON(!OCFS2_IS_VALID_DINODE(fe)); |
|
|
|
flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
|
if (dirty) |
|
flags |= OCFS2_JOURNAL_DIRTY_FL; |
|
else |
|
flags &= ~OCFS2_JOURNAL_DIRTY_FL; |
|
fe->id1.journal1.ij_flags = cpu_to_le32(flags); |
|
|
|
if (replayed) |
|
ocfs2_bump_recovery_generation(fe); |
|
|
|
ocfs2_compute_meta_ecc(osb->sb, bh->b_data, &fe->i_check); |
|
status = ocfs2_write_block(osb, bh, INODE_CACHE(journal->j_inode)); |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
return status; |
|
} |
|
|
|
/* |
|
* If the journal has been kmalloc'd it needs to be freed after this |
|
* call. |
|
*/ |
|
void ocfs2_journal_shutdown(struct ocfs2_super *osb) |
|
{ |
|
struct ocfs2_journal *journal = NULL; |
|
int status = 0; |
|
struct inode *inode = NULL; |
|
int num_running_trans = 0; |
|
|
|
BUG_ON(!osb); |
|
|
|
journal = osb->journal; |
|
if (!journal) |
|
goto done; |
|
|
|
inode = journal->j_inode; |
|
|
|
if (journal->j_state != OCFS2_JOURNAL_LOADED) |
|
goto done; |
|
|
|
/* need to inc inode use count - jbd2_journal_destroy will iput. */ |
|
if (!igrab(inode)) |
|
BUG(); |
|
|
|
num_running_trans = atomic_read(&(osb->journal->j_num_trans)); |
|
trace_ocfs2_journal_shutdown(num_running_trans); |
|
|
|
/* Do a commit_cache here. It will flush our journal, *and* |
|
* release any locks that are still held. |
|
* set the SHUTDOWN flag and release the trans lock. |
|
* the commit thread will take the trans lock for us below. */ |
|
journal->j_state = OCFS2_JOURNAL_IN_SHUTDOWN; |
|
|
|
/* The OCFS2_JOURNAL_IN_SHUTDOWN will signal to commit_cache to not |
|
* drop the trans_lock (which we want to hold until we |
|
* completely destroy the journal. */ |
|
if (osb->commit_task) { |
|
/* Wait for the commit thread */ |
|
trace_ocfs2_journal_shutdown_wait(osb->commit_task); |
|
kthread_stop(osb->commit_task); |
|
osb->commit_task = NULL; |
|
} |
|
|
|
BUG_ON(atomic_read(&(osb->journal->j_num_trans)) != 0); |
|
|
|
if (ocfs2_mount_local(osb)) { |
|
jbd2_journal_lock_updates(journal->j_journal); |
|
status = jbd2_journal_flush(journal->j_journal, 0); |
|
jbd2_journal_unlock_updates(journal->j_journal); |
|
if (status < 0) |
|
mlog_errno(status); |
|
} |
|
|
|
/* Shutdown the kernel journal system */ |
|
if (!jbd2_journal_destroy(journal->j_journal) && !status) { |
|
/* |
|
* Do not toggle if flush was unsuccessful otherwise |
|
* will leave dirty metadata in a "clean" journal |
|
*/ |
|
status = ocfs2_journal_toggle_dirty(osb, 0, 0); |
|
if (status < 0) |
|
mlog_errno(status); |
|
} |
|
journal->j_journal = NULL; |
|
|
|
OCFS2_I(inode)->ip_open_count--; |
|
|
|
/* unlock our journal */ |
|
ocfs2_inode_unlock(inode, 1); |
|
|
|
brelse(journal->j_bh); |
|
journal->j_bh = NULL; |
|
|
|
journal->j_state = OCFS2_JOURNAL_FREE; |
|
|
|
// up_write(&journal->j_trans_barrier); |
|
done: |
|
iput(inode); |
|
} |
|
|
|
static void ocfs2_clear_journal_error(struct super_block *sb, |
|
journal_t *journal, |
|
int slot) |
|
{ |
|
int olderr; |
|
|
|
olderr = jbd2_journal_errno(journal); |
|
if (olderr) { |
|
mlog(ML_ERROR, "File system error %d recorded in " |
|
"journal %u.\n", olderr, slot); |
|
mlog(ML_ERROR, "File system on device %s needs checking.\n", |
|
sb->s_id); |
|
|
|
jbd2_journal_ack_err(journal); |
|
jbd2_journal_clear_err(journal); |
|
} |
|
} |
|
|
|
int ocfs2_journal_load(struct ocfs2_journal *journal, int local, int replayed) |
|
{ |
|
int status = 0; |
|
struct ocfs2_super *osb; |
|
|
|
BUG_ON(!journal); |
|
|
|
osb = journal->j_osb; |
|
|
|
status = jbd2_journal_load(journal->j_journal); |
|
if (status < 0) { |
|
mlog(ML_ERROR, "Failed to load journal!\n"); |
|
goto done; |
|
} |
|
|
|
ocfs2_clear_journal_error(osb->sb, journal->j_journal, osb->slot_num); |
|
|
|
if (replayed) { |
|
jbd2_journal_lock_updates(journal->j_journal); |
|
status = jbd2_journal_flush(journal->j_journal, 0); |
|
jbd2_journal_unlock_updates(journal->j_journal); |
|
if (status < 0) |
|
mlog_errno(status); |
|
} |
|
|
|
status = ocfs2_journal_toggle_dirty(osb, 1, replayed); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto done; |
|
} |
|
|
|
/* Launch the commit thread */ |
|
if (!local) { |
|
osb->commit_task = kthread_run(ocfs2_commit_thread, osb, |
|
"ocfs2cmt-%s", osb->uuid_str); |
|
if (IS_ERR(osb->commit_task)) { |
|
status = PTR_ERR(osb->commit_task); |
|
osb->commit_task = NULL; |
|
mlog(ML_ERROR, "unable to launch ocfs2commit thread, " |
|
"error=%d", status); |
|
goto done; |
|
} |
|
} else |
|
osb->commit_task = NULL; |
|
|
|
done: |
|
return status; |
|
} |
|
|
|
|
|
/* 'full' flag tells us whether we clear out all blocks or if we just |
|
* mark the journal clean */ |
|
int ocfs2_journal_wipe(struct ocfs2_journal *journal, int full) |
|
{ |
|
int status; |
|
|
|
BUG_ON(!journal); |
|
|
|
status = jbd2_journal_wipe(journal->j_journal, full); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
|
|
status = ocfs2_journal_toggle_dirty(journal->j_osb, 0, 0); |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
bail: |
|
return status; |
|
} |
|
|
|
static int ocfs2_recovery_completed(struct ocfs2_super *osb) |
|
{ |
|
int empty; |
|
struct ocfs2_recovery_map *rm = osb->recovery_map; |
|
|
|
spin_lock(&osb->osb_lock); |
|
empty = (rm->rm_used == 0); |
|
spin_unlock(&osb->osb_lock); |
|
|
|
return empty; |
|
} |
|
|
|
void ocfs2_wait_for_recovery(struct ocfs2_super *osb) |
|
{ |
|
wait_event(osb->recovery_event, ocfs2_recovery_completed(osb)); |
|
} |
|
|
|
/* |
|
* JBD Might read a cached version of another nodes journal file. We |
|
* don't want this as this file changes often and we get no |
|
* notification on those changes. The only way to be sure that we've |
|
* got the most up to date version of those blocks then is to force |
|
* read them off disk. Just searching through the buffer cache won't |
|
* work as there may be pages backing this file which are still marked |
|
* up to date. We know things can't change on this file underneath us |
|
* as we have the lock by now :) |
|
*/ |
|
static int ocfs2_force_read_journal(struct inode *inode) |
|
{ |
|
int status = 0; |
|
int i; |
|
u64 v_blkno, p_blkno, p_blocks, num_blocks; |
|
struct buffer_head *bh = NULL; |
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
|
|
|
num_blocks = ocfs2_blocks_for_bytes(inode->i_sb, i_size_read(inode)); |
|
v_blkno = 0; |
|
while (v_blkno < num_blocks) { |
|
status = ocfs2_extent_map_get_blocks(inode, v_blkno, |
|
&p_blkno, &p_blocks, NULL); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
|
|
for (i = 0; i < p_blocks; i++, p_blkno++) { |
|
bh = __find_get_block(osb->sb->s_bdev, p_blkno, |
|
osb->sb->s_blocksize); |
|
/* block not cached. */ |
|
if (!bh) |
|
continue; |
|
|
|
brelse(bh); |
|
bh = NULL; |
|
/* We are reading journal data which should not |
|
* be put in the uptodate cache. |
|
*/ |
|
status = ocfs2_read_blocks_sync(osb, p_blkno, 1, &bh); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
|
|
brelse(bh); |
|
bh = NULL; |
|
} |
|
|
|
v_blkno += p_blocks; |
|
} |
|
|
|
bail: |
|
return status; |
|
} |
|
|
|
struct ocfs2_la_recovery_item { |
|
struct list_head lri_list; |
|
int lri_slot; |
|
struct ocfs2_dinode *lri_la_dinode; |
|
struct ocfs2_dinode *lri_tl_dinode; |
|
struct ocfs2_quota_recovery *lri_qrec; |
|
enum ocfs2_orphan_reco_type lri_orphan_reco_type; |
|
}; |
|
|
|
/* Does the second half of the recovery process. By this point, the |
|
* node is marked clean and can actually be considered recovered, |
|
* hence it's no longer in the recovery map, but there's still some |
|
* cleanup we can do which shouldn't happen within the recovery thread |
|
* as locking in that context becomes very difficult if we are to take |
|
* recovering nodes into account. |
|
* |
|
* NOTE: This function can and will sleep on recovery of other nodes |
|
* during cluster locking, just like any other ocfs2 process. |
|
*/ |
|
void ocfs2_complete_recovery(struct work_struct *work) |
|
{ |
|
int ret = 0; |
|
struct ocfs2_journal *journal = |
|
container_of(work, struct ocfs2_journal, j_recovery_work); |
|
struct ocfs2_super *osb = journal->j_osb; |
|
struct ocfs2_dinode *la_dinode, *tl_dinode; |
|
struct ocfs2_la_recovery_item *item, *n; |
|
struct ocfs2_quota_recovery *qrec; |
|
enum ocfs2_orphan_reco_type orphan_reco_type; |
|
LIST_HEAD(tmp_la_list); |
|
|
|
trace_ocfs2_complete_recovery( |
|
(unsigned long long)OCFS2_I(journal->j_inode)->ip_blkno); |
|
|
|
spin_lock(&journal->j_lock); |
|
list_splice_init(&journal->j_la_cleanups, &tmp_la_list); |
|
spin_unlock(&journal->j_lock); |
|
|
|
list_for_each_entry_safe(item, n, &tmp_la_list, lri_list) { |
|
list_del_init(&item->lri_list); |
|
|
|
ocfs2_wait_on_quotas(osb); |
|
|
|
la_dinode = item->lri_la_dinode; |
|
tl_dinode = item->lri_tl_dinode; |
|
qrec = item->lri_qrec; |
|
orphan_reco_type = item->lri_orphan_reco_type; |
|
|
|
trace_ocfs2_complete_recovery_slot(item->lri_slot, |
|
la_dinode ? le64_to_cpu(la_dinode->i_blkno) : 0, |
|
tl_dinode ? le64_to_cpu(tl_dinode->i_blkno) : 0, |
|
qrec); |
|
|
|
if (la_dinode) { |
|
ret = ocfs2_complete_local_alloc_recovery(osb, |
|
la_dinode); |
|
if (ret < 0) |
|
mlog_errno(ret); |
|
|
|
kfree(la_dinode); |
|
} |
|
|
|
if (tl_dinode) { |
|
ret = ocfs2_complete_truncate_log_recovery(osb, |
|
tl_dinode); |
|
if (ret < 0) |
|
mlog_errno(ret); |
|
|
|
kfree(tl_dinode); |
|
} |
|
|
|
ret = ocfs2_recover_orphans(osb, item->lri_slot, |
|
orphan_reco_type); |
|
if (ret < 0) |
|
mlog_errno(ret); |
|
|
|
if (qrec) { |
|
ret = ocfs2_finish_quota_recovery(osb, qrec, |
|
item->lri_slot); |
|
if (ret < 0) |
|
mlog_errno(ret); |
|
/* Recovery info is already freed now */ |
|
} |
|
|
|
kfree(item); |
|
} |
|
|
|
trace_ocfs2_complete_recovery_end(ret); |
|
} |
|
|
|
/* NOTE: This function always eats your references to la_dinode and |
|
* tl_dinode, either manually on error, or by passing them to |
|
* ocfs2_complete_recovery */ |
|
static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal, |
|
int slot_num, |
|
struct ocfs2_dinode *la_dinode, |
|
struct ocfs2_dinode *tl_dinode, |
|
struct ocfs2_quota_recovery *qrec, |
|
enum ocfs2_orphan_reco_type orphan_reco_type) |
|
{ |
|
struct ocfs2_la_recovery_item *item; |
|
|
|
item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_NOFS); |
|
if (!item) { |
|
/* Though we wish to avoid it, we are in fact safe in |
|
* skipping local alloc cleanup as fsck.ocfs2 is more |
|
* than capable of reclaiming unused space. */ |
|
kfree(la_dinode); |
|
kfree(tl_dinode); |
|
|
|
if (qrec) |
|
ocfs2_free_quota_recovery(qrec); |
|
|
|
mlog_errno(-ENOMEM); |
|
return; |
|
} |
|
|
|
INIT_LIST_HEAD(&item->lri_list); |
|
item->lri_la_dinode = la_dinode; |
|
item->lri_slot = slot_num; |
|
item->lri_tl_dinode = tl_dinode; |
|
item->lri_qrec = qrec; |
|
item->lri_orphan_reco_type = orphan_reco_type; |
|
|
|
spin_lock(&journal->j_lock); |
|
list_add_tail(&item->lri_list, &journal->j_la_cleanups); |
|
queue_work(journal->j_osb->ocfs2_wq, &journal->j_recovery_work); |
|
spin_unlock(&journal->j_lock); |
|
} |
|
|
|
/* Called by the mount code to queue recovery the last part of |
|
* recovery for it's own and offline slot(s). */ |
|
void ocfs2_complete_mount_recovery(struct ocfs2_super *osb) |
|
{ |
|
struct ocfs2_journal *journal = osb->journal; |
|
|
|
if (ocfs2_is_hard_readonly(osb)) |
|
return; |
|
|
|
/* No need to queue up our truncate_log as regular cleanup will catch |
|
* that */ |
|
ocfs2_queue_recovery_completion(journal, osb->slot_num, |
|
osb->local_alloc_copy, NULL, NULL, |
|
ORPHAN_NEED_TRUNCATE); |
|
ocfs2_schedule_truncate_log_flush(osb, 0); |
|
|
|
osb->local_alloc_copy = NULL; |
|
|
|
/* queue to recover orphan slots for all offline slots */ |
|
ocfs2_replay_map_set_state(osb, REPLAY_NEEDED); |
|
ocfs2_queue_replay_slots(osb, ORPHAN_NEED_TRUNCATE); |
|
ocfs2_free_replay_slots(osb); |
|
} |
|
|
|
void ocfs2_complete_quota_recovery(struct ocfs2_super *osb) |
|
{ |
|
if (osb->quota_rec) { |
|
ocfs2_queue_recovery_completion(osb->journal, |
|
osb->slot_num, |
|
NULL, |
|
NULL, |
|
osb->quota_rec, |
|
ORPHAN_NEED_TRUNCATE); |
|
osb->quota_rec = NULL; |
|
} |
|
} |
|
|
|
static int __ocfs2_recovery_thread(void *arg) |
|
{ |
|
int status, node_num, slot_num; |
|
struct ocfs2_super *osb = arg; |
|
struct ocfs2_recovery_map *rm = osb->recovery_map; |
|
int *rm_quota = NULL; |
|
int rm_quota_used = 0, i; |
|
struct ocfs2_quota_recovery *qrec; |
|
|
|
/* Whether the quota supported. */ |
|
int quota_enabled = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, |
|
OCFS2_FEATURE_RO_COMPAT_USRQUOTA) |
|
|| OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, |
|
OCFS2_FEATURE_RO_COMPAT_GRPQUOTA); |
|
|
|
status = ocfs2_wait_on_mount(osb); |
|
if (status < 0) { |
|
goto bail; |
|
} |
|
|
|
if (quota_enabled) { |
|
rm_quota = kcalloc(osb->max_slots, sizeof(int), GFP_NOFS); |
|
if (!rm_quota) { |
|
status = -ENOMEM; |
|
goto bail; |
|
} |
|
} |
|
restart: |
|
status = ocfs2_super_lock(osb, 1); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
|
|
status = ocfs2_compute_replay_slots(osb); |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
/* queue recovery for our own slot */ |
|
ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL, |
|
NULL, NULL, ORPHAN_NO_NEED_TRUNCATE); |
|
|
|
spin_lock(&osb->osb_lock); |
|
while (rm->rm_used) { |
|
/* It's always safe to remove entry zero, as we won't |
|
* clear it until ocfs2_recover_node() has succeeded. */ |
|
node_num = rm->rm_entries[0]; |
|
spin_unlock(&osb->osb_lock); |
|
slot_num = ocfs2_node_num_to_slot(osb, node_num); |
|
trace_ocfs2_recovery_thread_node(node_num, slot_num); |
|
if (slot_num == -ENOENT) { |
|
status = 0; |
|
goto skip_recovery; |
|
} |
|
|
|
/* It is a bit subtle with quota recovery. We cannot do it |
|
* immediately because we have to obtain cluster locks from |
|
* quota files and we also don't want to just skip it because |
|
* then quota usage would be out of sync until some node takes |
|
* the slot. So we remember which nodes need quota recovery |
|
* and when everything else is done, we recover quotas. */ |
|
if (quota_enabled) { |
|
for (i = 0; i < rm_quota_used |
|
&& rm_quota[i] != slot_num; i++) |
|
; |
|
|
|
if (i == rm_quota_used) |
|
rm_quota[rm_quota_used++] = slot_num; |
|
} |
|
|
|
status = ocfs2_recover_node(osb, node_num, slot_num); |
|
skip_recovery: |
|
if (!status) { |
|
ocfs2_recovery_map_clear(osb, node_num); |
|
} else { |
|
mlog(ML_ERROR, |
|
"Error %d recovering node %d on device (%u,%u)!\n", |
|
status, node_num, |
|
MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); |
|
mlog(ML_ERROR, "Volume requires unmount.\n"); |
|
} |
|
|
|
spin_lock(&osb->osb_lock); |
|
} |
|
spin_unlock(&osb->osb_lock); |
|
trace_ocfs2_recovery_thread_end(status); |
|
|
|
/* Refresh all journal recovery generations from disk */ |
|
status = ocfs2_check_journals_nolocks(osb); |
|
status = (status == -EROFS) ? 0 : status; |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
/* Now it is right time to recover quotas... We have to do this under |
|
* superblock lock so that no one can start using the slot (and crash) |
|
* before we recover it */ |
|
if (quota_enabled) { |
|
for (i = 0; i < rm_quota_used; i++) { |
|
qrec = ocfs2_begin_quota_recovery(osb, rm_quota[i]); |
|
if (IS_ERR(qrec)) { |
|
status = PTR_ERR(qrec); |
|
mlog_errno(status); |
|
continue; |
|
} |
|
ocfs2_queue_recovery_completion(osb->journal, |
|
rm_quota[i], |
|
NULL, NULL, qrec, |
|
ORPHAN_NEED_TRUNCATE); |
|
} |
|
} |
|
|
|
ocfs2_super_unlock(osb, 1); |
|
|
|
/* queue recovery for offline slots */ |
|
ocfs2_queue_replay_slots(osb, ORPHAN_NEED_TRUNCATE); |
|
|
|
bail: |
|
mutex_lock(&osb->recovery_lock); |
|
if (!status && !ocfs2_recovery_completed(osb)) { |
|
mutex_unlock(&osb->recovery_lock); |
|
goto restart; |
|
} |
|
|
|
ocfs2_free_replay_slots(osb); |
|
osb->recovery_thread_task = NULL; |
|
mb(); /* sync with ocfs2_recovery_thread_running */ |
|
wake_up(&osb->recovery_event); |
|
|
|
mutex_unlock(&osb->recovery_lock); |
|
|
|
if (quota_enabled) |
|
kfree(rm_quota); |
|
|
|
/* no one is callint kthread_stop() for us so the kthread() api |
|
* requires that we call do_exit(). And it isn't exported, but |
|
* complete_and_exit() seems to be a minimal wrapper around it. */ |
|
complete_and_exit(NULL, status); |
|
} |
|
|
|
void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num) |
|
{ |
|
mutex_lock(&osb->recovery_lock); |
|
|
|
trace_ocfs2_recovery_thread(node_num, osb->node_num, |
|
osb->disable_recovery, osb->recovery_thread_task, |
|
osb->disable_recovery ? |
|
-1 : ocfs2_recovery_map_set(osb, node_num)); |
|
|
|
if (osb->disable_recovery) |
|
goto out; |
|
|
|
if (osb->recovery_thread_task) |
|
goto out; |
|
|
|
osb->recovery_thread_task = kthread_run(__ocfs2_recovery_thread, osb, |
|
"ocfs2rec-%s", osb->uuid_str); |
|
if (IS_ERR(osb->recovery_thread_task)) { |
|
mlog_errno((int)PTR_ERR(osb->recovery_thread_task)); |
|
osb->recovery_thread_task = NULL; |
|
} |
|
|
|
out: |
|
mutex_unlock(&osb->recovery_lock); |
|
wake_up(&osb->recovery_event); |
|
} |
|
|
|
static int ocfs2_read_journal_inode(struct ocfs2_super *osb, |
|
int slot_num, |
|
struct buffer_head **bh, |
|
struct inode **ret_inode) |
|
{ |
|
int status = -EACCES; |
|
struct inode *inode = NULL; |
|
|
|
BUG_ON(slot_num >= osb->max_slots); |
|
|
|
inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
|
slot_num); |
|
if (!inode || is_bad_inode(inode)) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
SET_INODE_JOURNAL(inode); |
|
|
|
status = ocfs2_read_inode_block_full(inode, bh, OCFS2_BH_IGNORE_CACHE); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
|
|
status = 0; |
|
|
|
bail: |
|
if (inode) { |
|
if (status || !ret_inode) |
|
iput(inode); |
|
else |
|
*ret_inode = inode; |
|
} |
|
return status; |
|
} |
|
|
|
/* Does the actual journal replay and marks the journal inode as |
|
* clean. Will only replay if the journal inode is marked dirty. */ |
|
static int ocfs2_replay_journal(struct ocfs2_super *osb, |
|
int node_num, |
|
int slot_num) |
|
{ |
|
int status; |
|
int got_lock = 0; |
|
unsigned int flags; |
|
struct inode *inode = NULL; |
|
struct ocfs2_dinode *fe; |
|
journal_t *journal = NULL; |
|
struct buffer_head *bh = NULL; |
|
u32 slot_reco_gen; |
|
|
|
status = ocfs2_read_journal_inode(osb, slot_num, &bh, &inode); |
|
if (status) { |
|
mlog_errno(status); |
|
goto done; |
|
} |
|
|
|
fe = (struct ocfs2_dinode *)bh->b_data; |
|
slot_reco_gen = ocfs2_get_recovery_generation(fe); |
|
brelse(bh); |
|
bh = NULL; |
|
|
|
/* |
|
* As the fs recovery is asynchronous, there is a small chance that |
|
* another node mounted (and recovered) the slot before the recovery |
|
* thread could get the lock. To handle that, we dirty read the journal |
|
* inode for that slot to get the recovery generation. If it is |
|
* different than what we expected, the slot has been recovered. |
|
* If not, it needs recovery. |
|
*/ |
|
if (osb->slot_recovery_generations[slot_num] != slot_reco_gen) { |
|
trace_ocfs2_replay_journal_recovered(slot_num, |
|
osb->slot_recovery_generations[slot_num], slot_reco_gen); |
|
osb->slot_recovery_generations[slot_num] = slot_reco_gen; |
|
status = -EBUSY; |
|
goto done; |
|
} |
|
|
|
/* Continue with recovery as the journal has not yet been recovered */ |
|
|
|
status = ocfs2_inode_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY); |
|
if (status < 0) { |
|
trace_ocfs2_replay_journal_lock_err(status); |
|
if (status != -ERESTARTSYS) |
|
mlog(ML_ERROR, "Could not lock journal!\n"); |
|
goto done; |
|
} |
|
got_lock = 1; |
|
|
|
fe = (struct ocfs2_dinode *) bh->b_data; |
|
|
|
flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
|
slot_reco_gen = ocfs2_get_recovery_generation(fe); |
|
|
|
if (!(flags & OCFS2_JOURNAL_DIRTY_FL)) { |
|
trace_ocfs2_replay_journal_skip(node_num); |
|
/* Refresh recovery generation for the slot */ |
|
osb->slot_recovery_generations[slot_num] = slot_reco_gen; |
|
goto done; |
|
} |
|
|
|
/* we need to run complete recovery for offline orphan slots */ |
|
ocfs2_replay_map_set_state(osb, REPLAY_NEEDED); |
|
|
|
printk(KERN_NOTICE "ocfs2: Begin replay journal (node %d, slot %d) on "\ |
|
"device (%u,%u)\n", node_num, slot_num, MAJOR(osb->sb->s_dev), |
|
MINOR(osb->sb->s_dev)); |
|
|
|
OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); |
|
|
|
status = ocfs2_force_read_journal(inode); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto done; |
|
} |
|
|
|
journal = jbd2_journal_init_inode(inode); |
|
if (journal == NULL) { |
|
mlog(ML_ERROR, "Linux journal layer error\n"); |
|
status = -EIO; |
|
goto done; |
|
} |
|
|
|
status = jbd2_journal_load(journal); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
if (!igrab(inode)) |
|
BUG(); |
|
jbd2_journal_destroy(journal); |
|
goto done; |
|
} |
|
|
|
ocfs2_clear_journal_error(osb->sb, journal, slot_num); |
|
|
|
/* wipe the journal */ |
|
jbd2_journal_lock_updates(journal); |
|
status = jbd2_journal_flush(journal, 0); |
|
jbd2_journal_unlock_updates(journal); |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
/* This will mark the node clean */ |
|
flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
|
flags &= ~OCFS2_JOURNAL_DIRTY_FL; |
|
fe->id1.journal1.ij_flags = cpu_to_le32(flags); |
|
|
|
/* Increment recovery generation to indicate successful recovery */ |
|
ocfs2_bump_recovery_generation(fe); |
|
osb->slot_recovery_generations[slot_num] = |
|
ocfs2_get_recovery_generation(fe); |
|
|
|
ocfs2_compute_meta_ecc(osb->sb, bh->b_data, &fe->i_check); |
|
status = ocfs2_write_block(osb, bh, INODE_CACHE(inode)); |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
if (!igrab(inode)) |
|
BUG(); |
|
|
|
jbd2_journal_destroy(journal); |
|
|
|
printk(KERN_NOTICE "ocfs2: End replay journal (node %d, slot %d) on "\ |
|
"device (%u,%u)\n", node_num, slot_num, MAJOR(osb->sb->s_dev), |
|
MINOR(osb->sb->s_dev)); |
|
done: |
|
/* drop the lock on this nodes journal */ |
|
if (got_lock) |
|
ocfs2_inode_unlock(inode, 1); |
|
|
|
iput(inode); |
|
brelse(bh); |
|
|
|
return status; |
|
} |
|
|
|
/* |
|
* Do the most important parts of node recovery: |
|
* - Replay it's journal |
|
* - Stamp a clean local allocator file |
|
* - Stamp a clean truncate log |
|
* - Mark the node clean |
|
* |
|
* If this function completes without error, a node in OCFS2 can be |
|
* said to have been safely recovered. As a result, failure during the |
|
* second part of a nodes recovery process (local alloc recovery) is |
|
* far less concerning. |
|
*/ |
|
static int ocfs2_recover_node(struct ocfs2_super *osb, |
|
int node_num, int slot_num) |
|
{ |
|
int status = 0; |
|
struct ocfs2_dinode *la_copy = NULL; |
|
struct ocfs2_dinode *tl_copy = NULL; |
|
|
|
trace_ocfs2_recover_node(node_num, slot_num, osb->node_num); |
|
|
|
/* Should not ever be called to recover ourselves -- in that |
|
* case we should've called ocfs2_journal_load instead. */ |
|
BUG_ON(osb->node_num == node_num); |
|
|
|
status = ocfs2_replay_journal(osb, node_num, slot_num); |
|
if (status < 0) { |
|
if (status == -EBUSY) { |
|
trace_ocfs2_recover_node_skip(slot_num, node_num); |
|
status = 0; |
|
goto done; |
|
} |
|
mlog_errno(status); |
|
goto done; |
|
} |
|
|
|
/* Stamp a clean local alloc file AFTER recovering the journal... */ |
|
status = ocfs2_begin_local_alloc_recovery(osb, slot_num, &la_copy); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto done; |
|
} |
|
|
|
/* An error from begin_truncate_log_recovery is not |
|
* serious enough to warrant halting the rest of |
|
* recovery. */ |
|
status = ocfs2_begin_truncate_log_recovery(osb, slot_num, &tl_copy); |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
/* Likewise, this would be a strange but ultimately not so |
|
* harmful place to get an error... */ |
|
status = ocfs2_clear_slot(osb, slot_num); |
|
if (status < 0) |
|
mlog_errno(status); |
|
|
|
/* This will kfree the memory pointed to by la_copy and tl_copy */ |
|
ocfs2_queue_recovery_completion(osb->journal, slot_num, la_copy, |
|
tl_copy, NULL, ORPHAN_NEED_TRUNCATE); |
|
|
|
status = 0; |
|
done: |
|
|
|
return status; |
|
} |
|
|
|
/* Test node liveness by trylocking his journal. If we get the lock, |
|
* we drop it here. Return 0 if we got the lock, -EAGAIN if node is |
|
* still alive (we couldn't get the lock) and < 0 on error. */ |
|
static int ocfs2_trylock_journal(struct ocfs2_super *osb, |
|
int slot_num) |
|
{ |
|
int status, flags; |
|
struct inode *inode = NULL; |
|
|
|
inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
|
slot_num); |
|
if (inode == NULL) { |
|
mlog(ML_ERROR, "access error\n"); |
|
status = -EACCES; |
|
goto bail; |
|
} |
|
if (is_bad_inode(inode)) { |
|
mlog(ML_ERROR, "access error (bad inode)\n"); |
|
iput(inode); |
|
inode = NULL; |
|
status = -EACCES; |
|
goto bail; |
|
} |
|
SET_INODE_JOURNAL(inode); |
|
|
|
flags = OCFS2_META_LOCK_RECOVERY | OCFS2_META_LOCK_NOQUEUE; |
|
status = ocfs2_inode_lock_full(inode, NULL, 1, flags); |
|
if (status < 0) { |
|
if (status != -EAGAIN) |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
|
|
ocfs2_inode_unlock(inode, 1); |
|
bail: |
|
iput(inode); |
|
|
|
return status; |
|
} |
|
|
|
/* Call this underneath ocfs2_super_lock. It also assumes that the |
|
* slot info struct has been updated from disk. */ |
|
int ocfs2_mark_dead_nodes(struct ocfs2_super *osb) |
|
{ |
|
unsigned int node_num; |
|
int status, i; |
|
u32 gen; |
|
struct buffer_head *bh = NULL; |
|
struct ocfs2_dinode *di; |
|
|
|
/* This is called with the super block cluster lock, so we |
|
* know that the slot map can't change underneath us. */ |
|
|
|
for (i = 0; i < osb->max_slots; i++) { |
|
/* Read journal inode to get the recovery generation */ |
|
status = ocfs2_read_journal_inode(osb, i, &bh, NULL); |
|
if (status) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
di = (struct ocfs2_dinode *)bh->b_data; |
|
gen = ocfs2_get_recovery_generation(di); |
|
brelse(bh); |
|
bh = NULL; |
|
|
|
spin_lock(&osb->osb_lock); |
|
osb->slot_recovery_generations[i] = gen; |
|
|
|
trace_ocfs2_mark_dead_nodes(i, |
|
osb->slot_recovery_generations[i]); |
|
|
|
if (i == osb->slot_num) { |
|
spin_unlock(&osb->osb_lock); |
|
continue; |
|
} |
|
|
|
status = ocfs2_slot_to_node_num_locked(osb, i, &node_num); |
|
if (status == -ENOENT) { |
|
spin_unlock(&osb->osb_lock); |
|
continue; |
|
} |
|
|
|
if (__ocfs2_recovery_map_test(osb, node_num)) { |
|
spin_unlock(&osb->osb_lock); |
|
continue; |
|
} |
|
spin_unlock(&osb->osb_lock); |
|
|
|
/* Ok, we have a slot occupied by another node which |
|
* is not in the recovery map. We trylock his journal |
|
* file here to test if he's alive. */ |
|
status = ocfs2_trylock_journal(osb, i); |
|
if (!status) { |
|
/* Since we're called from mount, we know that |
|
* the recovery thread can't race us on |
|
* setting / checking the recovery bits. */ |
|
ocfs2_recovery_thread(osb, node_num); |
|
} else if ((status < 0) && (status != -EAGAIN)) { |
|
mlog_errno(status); |
|
goto bail; |
|
} |
|
} |
|
|
|
status = 0; |
|
bail: |
|
return status; |
|
} |
|
|
|
/* |
|
* Scan timer should get fired every ORPHAN_SCAN_SCHEDULE_TIMEOUT. Add some |
|
* randomness to the timeout to minimize multple nodes firing the timer at the |
|
* same time. |
|
*/ |
|
static inline unsigned long ocfs2_orphan_scan_timeout(void) |
|
{ |
|
unsigned long time; |
|
|
|
get_random_bytes(&time, sizeof(time)); |
|
time = ORPHAN_SCAN_SCHEDULE_TIMEOUT + (time % 5000); |
|
return msecs_to_jiffies(time); |
|
} |
|
|
|
/* |
|
* ocfs2_queue_orphan_scan calls ocfs2_queue_recovery_completion for |
|
* every slot, queuing a recovery of the slot on the ocfs2_wq thread. This |
|
* is done to catch any orphans that are left over in orphan directories. |
|
* |
|
* It scans all slots, even ones that are in use. It does so to handle the |
|
* case described below: |
|
* |
|
* Node 1 has an inode it was using. The dentry went away due to memory |
|
* pressure. Node 1 closes the inode, but it's on the free list. The node |
|
* has the open lock. |
|
* Node 2 unlinks the inode. It grabs the dentry lock to notify others, |
|
* but node 1 has no dentry and doesn't get the message. It trylocks the |
|
* open lock, sees that another node has a PR, and does nothing. |
|
* Later node 2 runs its orphan dir. It igets the inode, trylocks the |
|
* open lock, sees the PR still, and does nothing. |
|
* Basically, we have to trigger an orphan iput on node 1. The only way |
|
* for this to happen is if node 1 runs node 2's orphan dir. |
|
* |
|
* ocfs2_queue_orphan_scan gets called every ORPHAN_SCAN_SCHEDULE_TIMEOUT |
|
* seconds. It gets an EX lock on os_lockres and checks sequence number |
|
* stored in LVB. If the sequence number has changed, it means some other |
|
* node has done the scan. This node skips the scan and tracks the |
|
* sequence number. If the sequence number didn't change, it means a scan |
|
* hasn't happened. The node queues a scan and increments the |
|
* sequence number in the LVB. |
|
*/ |
|
static void ocfs2_queue_orphan_scan(struct ocfs2_super *osb) |
|
{ |
|
struct ocfs2_orphan_scan *os; |
|
int status, i; |
|
u32 seqno = 0; |
|
|
|
os = &osb->osb_orphan_scan; |
|
|
|
if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) |
|
goto out; |
|
|
|
trace_ocfs2_queue_orphan_scan_begin(os->os_count, os->os_seqno, |
|
atomic_read(&os->os_state)); |
|
|
|
status = ocfs2_orphan_scan_lock(osb, &seqno); |
|
if (status < 0) { |
|
if (status != -EAGAIN) |
|
mlog_errno(status); |
|
goto out; |
|
} |
|
|
|
/* Do no queue the tasks if the volume is being umounted */ |
|
if (atomic_read(&os->os_state) == ORPHAN_SCAN_INACTIVE) |
|
goto unlock; |
|
|
|
if (os->os_seqno != seqno) { |
|
os->os_seqno = seqno; |
|
goto unlock; |
|
} |
|
|
|
for (i = 0; i < osb->max_slots; i++) |
|
ocfs2_queue_recovery_completion(osb->journal, i, NULL, NULL, |
|
NULL, ORPHAN_NO_NEED_TRUNCATE); |
|
/* |
|
* We queued a recovery on orphan slots, increment the sequence |
|
* number and update LVB so other node will skip the scan for a while |
|
*/ |
|
seqno++; |
|
os->os_count++; |
|
os->os_scantime = ktime_get_seconds(); |
|
unlock: |
|
ocfs2_orphan_scan_unlock(osb, seqno); |
|
out: |
|
trace_ocfs2_queue_orphan_scan_end(os->os_count, os->os_seqno, |
|
atomic_read(&os->os_state)); |
|
return; |
|
} |
|
|
|
/* Worker task that gets fired every ORPHAN_SCAN_SCHEDULE_TIMEOUT millsec */ |
|
static void ocfs2_orphan_scan_work(struct work_struct *work) |
|
{ |
|
struct ocfs2_orphan_scan *os; |
|
struct ocfs2_super *osb; |
|
|
|
os = container_of(work, struct ocfs2_orphan_scan, |
|
os_orphan_scan_work.work); |
|
osb = os->os_osb; |
|
|
|
mutex_lock(&os->os_lock); |
|
ocfs2_queue_orphan_scan(osb); |
|
if (atomic_read(&os->os_state) == ORPHAN_SCAN_ACTIVE) |
|
queue_delayed_work(osb->ocfs2_wq, &os->os_orphan_scan_work, |
|
ocfs2_orphan_scan_timeout()); |
|
mutex_unlock(&os->os_lock); |
|
} |
|
|
|
void ocfs2_orphan_scan_stop(struct ocfs2_super *osb) |
|
{ |
|
struct ocfs2_orphan_scan *os; |
|
|
|
os = &osb->osb_orphan_scan; |
|
if (atomic_read(&os->os_state) == ORPHAN_SCAN_ACTIVE) { |
|
atomic_set(&os->os_state, ORPHAN_SCAN_INACTIVE); |
|
mutex_lock(&os->os_lock); |
|
cancel_delayed_work(&os->os_orphan_scan_work); |
|
mutex_unlock(&os->os_lock); |
|
} |
|
} |
|
|
|
void ocfs2_orphan_scan_init(struct ocfs2_super *osb) |
|
{ |
|
struct ocfs2_orphan_scan *os; |
|
|
|
os = &osb->osb_orphan_scan; |
|
os->os_osb = osb; |
|
os->os_count = 0; |
|
os->os_seqno = 0; |
|
mutex_init(&os->os_lock); |
|
INIT_DELAYED_WORK(&os->os_orphan_scan_work, ocfs2_orphan_scan_work); |
|
} |
|
|
|
void ocfs2_orphan_scan_start(struct ocfs2_super *osb) |
|
{ |
|
struct ocfs2_orphan_scan *os; |
|
|
|
os = &osb->osb_orphan_scan; |
|
os->os_scantime = ktime_get_seconds(); |
|
if (ocfs2_is_hard_readonly(osb) || ocfs2_mount_local(osb)) |
|
atomic_set(&os->os_state, ORPHAN_SCAN_INACTIVE); |
|
else { |
|
atomic_set(&os->os_state, ORPHAN_SCAN_ACTIVE); |
|
queue_delayed_work(osb->ocfs2_wq, &os->os_orphan_scan_work, |
|
ocfs2_orphan_scan_timeout()); |
|
} |
|
} |
|
|
|
struct ocfs2_orphan_filldir_priv { |
|
struct dir_context ctx; |
|
struct inode *head; |
|
struct ocfs2_super *osb; |
|
enum ocfs2_orphan_reco_type orphan_reco_type; |
|
}; |
|
|
|
static int ocfs2_orphan_filldir(struct dir_context *ctx, const char *name, |
|
int name_len, loff_t pos, u64 ino, |
|
unsigned type) |
|
{ |
|
struct ocfs2_orphan_filldir_priv *p = |
|
container_of(ctx, struct ocfs2_orphan_filldir_priv, ctx); |
|
struct inode *iter; |
|
|
|
if (name_len == 1 && !strncmp(".", name, 1)) |
|
return 0; |
|
if (name_len == 2 && !strncmp("..", name, 2)) |
|
return 0; |
|
|
|
/* do not include dio entry in case of orphan scan */ |
|
if ((p->orphan_reco_type == ORPHAN_NO_NEED_TRUNCATE) && |
|
(!strncmp(name, OCFS2_DIO_ORPHAN_PREFIX, |
|
OCFS2_DIO_ORPHAN_PREFIX_LEN))) |
|
return 0; |
|
|
|
/* Skip bad inodes so that recovery can continue */ |
|
iter = ocfs2_iget(p->osb, ino, |
|
OCFS2_FI_FLAG_ORPHAN_RECOVERY, 0); |
|
if (IS_ERR(iter)) |
|
return 0; |
|
|
|
if (!strncmp(name, OCFS2_DIO_ORPHAN_PREFIX, |
|
OCFS2_DIO_ORPHAN_PREFIX_LEN)) |
|
OCFS2_I(iter)->ip_flags |= OCFS2_INODE_DIO_ORPHAN_ENTRY; |
|
|
|
/* Skip inodes which are already added to recover list, since dio may |
|
* happen concurrently with unlink/rename */ |
|
if (OCFS2_I(iter)->ip_next_orphan) { |
|
iput(iter); |
|
return 0; |
|
} |
|
|
|
trace_ocfs2_orphan_filldir((unsigned long long)OCFS2_I(iter)->ip_blkno); |
|
/* No locking is required for the next_orphan queue as there |
|
* is only ever a single process doing orphan recovery. */ |
|
OCFS2_I(iter)->ip_next_orphan = p->head; |
|
p->head = iter; |
|
|
|
return 0; |
|
} |
|
|
|
static int ocfs2_queue_orphans(struct ocfs2_super *osb, |
|
int slot, |
|
struct inode **head, |
|
enum ocfs2_orphan_reco_type orphan_reco_type) |
|
{ |
|
int status; |
|
struct inode *orphan_dir_inode = NULL; |
|
struct ocfs2_orphan_filldir_priv priv = { |
|
.ctx.actor = ocfs2_orphan_filldir, |
|
.osb = osb, |
|
.head = *head, |
|
.orphan_reco_type = orphan_reco_type |
|
}; |
|
|
|
orphan_dir_inode = ocfs2_get_system_file_inode(osb, |
|
ORPHAN_DIR_SYSTEM_INODE, |
|
slot); |
|
if (!orphan_dir_inode) { |
|
status = -ENOENT; |
|
mlog_errno(status); |
|
return status; |
|
} |
|
|
|
inode_lock(orphan_dir_inode); |
|
status = ocfs2_inode_lock(orphan_dir_inode, NULL, 0); |
|
if (status < 0) { |
|
mlog_errno(status); |
|
goto out; |
|
} |
|
|
|
status = ocfs2_dir_foreach(orphan_dir_inode, &priv.ctx); |
|
if (status) { |
|
mlog_errno(status); |
|
goto out_cluster; |
|
} |
|
|
|
*head = priv.head; |
|
|
|
out_cluster: |
|
ocfs2_inode_unlock(orphan_dir_inode, 0); |
|
out: |
|
inode_unlock(orphan_dir_inode); |
|
iput(orphan_dir_inode); |
|
return status; |
|
} |
|
|
|
static int ocfs2_orphan_recovery_can_continue(struct ocfs2_super *osb, |
|
int slot) |
|
{ |
|
int ret; |
|
|
|
spin_lock(&osb->osb_lock); |
|
ret = !osb->osb_orphan_wipes[slot]; |
|
spin_unlock(&osb->osb_lock); |
|
return ret; |
|
} |
|
|
|
static void ocfs2_mark_recovering_orphan_dir(struct ocfs2_super *osb, |
|
int slot) |
|
{ |
|
spin_lock(&osb->osb_lock); |
|
/* Mark ourselves such that new processes in delete_inode() |
|
* know to quit early. */ |
|
ocfs2_node_map_set_bit(osb, &osb->osb_recovering_orphan_dirs, slot); |
|
while (osb->osb_orphan_wipes[slot]) { |
|
/* If any processes are already in the middle of an |
|
* orphan wipe on this dir, then we need to wait for |
|
* them. */ |
|
spin_unlock(&osb->osb_lock); |
|
wait_event_interruptible(osb->osb_wipe_event, |
|
ocfs2_orphan_recovery_can_continue(osb, slot)); |
|
spin_lock(&osb->osb_lock); |
|
} |
|
spin_unlock(&osb->osb_lock); |
|
} |
|
|
|
static void ocfs2_clear_recovering_orphan_dir(struct ocfs2_super *osb, |
|
int slot) |
|
{ |
|
ocfs2_node_map_clear_bit(osb, &osb->osb_recovering_orphan_dirs, slot); |
|
} |
|
|
|
/* |
|
* Orphan recovery. Each mounted node has it's own orphan dir which we |
|
* must run during recovery. Our strategy here is to build a list of |
|
* the inodes in the orphan dir and iget/iput them. The VFS does |
|
* (most) of the rest of the work. |
|
* |
|
* Orphan recovery can happen at any time, not just mount so we have a |
|
* couple of extra considerations. |
|
* |
|
* - We grab as many inodes as we can under the orphan dir lock - |
|
* doing iget() outside the orphan dir risks getting a reference on |
|
* an invalid inode. |
|
* - We must be sure not to deadlock with other processes on the |
|
* system wanting to run delete_inode(). This can happen when they go |
|
* to lock the orphan dir and the orphan recovery process attempts to |
|
* iget() inside the orphan dir lock. This can be avoided by |
|
* advertising our state to ocfs2_delete_inode(). |
|
*/ |
|
static int ocfs2_recover_orphans(struct ocfs2_super *osb, |
|
int slot, |
|
enum ocfs2_orphan_reco_type orphan_reco_type) |
|
{ |
|
int ret = 0; |
|
struct inode *inode = NULL; |
|
struct inode *iter; |
|
struct ocfs2_inode_info *oi; |
|
struct buffer_head *di_bh = NULL; |
|
struct ocfs2_dinode *di = NULL; |
|
|
|
trace_ocfs2_recover_orphans(slot); |
|
|
|
ocfs2_mark_recovering_orphan_dir(osb, slot); |
|
ret = ocfs2_queue_orphans(osb, slot, &inode, orphan_reco_type); |
|
ocfs2_clear_recovering_orphan_dir(osb, slot); |
|
|
|
/* Error here should be noted, but we want to continue with as |
|
* many queued inodes as we've got. */ |
|
if (ret) |
|
mlog_errno(ret); |
|
|
|
while (inode) { |
|
oi = OCFS2_I(inode); |
|
trace_ocfs2_recover_orphans_iput( |
|
(unsigned long long)oi->ip_blkno); |
|
|
|
iter = oi->ip_next_orphan; |
|
oi->ip_next_orphan = NULL; |
|
|
|
if (oi->ip_flags & OCFS2_INODE_DIO_ORPHAN_ENTRY) { |
|
inode_lock(inode); |
|
ret = ocfs2_rw_lock(inode, 1); |
|
if (ret < 0) { |
|
mlog_errno(ret); |
|
goto unlock_mutex; |
|
} |
|
/* |
|
* We need to take and drop the inode lock to |
|
* force read inode from disk. |
|
*/ |
|
ret = ocfs2_inode_lock(inode, &di_bh, 1); |
|
if (ret) { |
|
mlog_errno(ret); |
|
goto unlock_rw; |
|
} |
|
|
|
di = (struct ocfs2_dinode *)di_bh->b_data; |
|
|
|
if (di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)) { |
|
ret = ocfs2_truncate_file(inode, di_bh, |
|
i_size_read(inode)); |
|
if (ret < 0) { |
|
if (ret != -ENOSPC) |
|
mlog_errno(ret); |
|
goto unlock_inode; |
|
} |
|
|
|
ret = ocfs2_del_inode_from_orphan(osb, inode, |
|
di_bh, 0, 0); |
|
if (ret) |
|
mlog_errno(ret); |
|
} |
|
unlock_inode: |
|
ocfs2_inode_unlock(inode, 1); |
|
brelse(di_bh); |
|
di_bh = NULL; |
|
unlock_rw: |
|
ocfs2_rw_unlock(inode, 1); |
|
unlock_mutex: |
|
inode_unlock(inode); |
|
|
|
/* clear dio flag in ocfs2_inode_info */ |
|
oi->ip_flags &= ~OCFS2_INODE_DIO_ORPHAN_ENTRY; |
|
} else { |
|
spin_lock(&oi->ip_lock); |
|
/* Set the proper information to get us going into |
|
* ocfs2_delete_inode. */ |
|
oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; |
|
spin_unlock(&oi->ip_lock); |
|
} |
|
|
|
iput(inode); |
|
inode = iter; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int __ocfs2_wait_on_mount(struct ocfs2_super *osb, int quota) |
|
{ |
|
/* This check is good because ocfs2 will wait on our recovery |
|
* thread before changing it to something other than MOUNTED |
|
* or DISABLED. */ |
|
wait_event(osb->osb_mount_event, |
|
(!quota && atomic_read(&osb->vol_state) == VOLUME_MOUNTED) || |
|
atomic_read(&osb->vol_state) == VOLUME_MOUNTED_QUOTAS || |
|
atomic_read(&osb->vol_state) == VOLUME_DISABLED); |
|
|
|
/* If there's an error on mount, then we may never get to the |
|
* MOUNTED flag, but this is set right before |
|
* dismount_volume() so we can trust it. */ |
|
if (atomic_read(&osb->vol_state) == VOLUME_DISABLED) { |
|
trace_ocfs2_wait_on_mount(VOLUME_DISABLED); |
|
mlog(0, "mount error, exiting!\n"); |
|
return -EBUSY; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int ocfs2_commit_thread(void *arg) |
|
{ |
|
int status; |
|
struct ocfs2_super *osb = arg; |
|
struct ocfs2_journal *journal = osb->journal; |
|
|
|
/* we can trust j_num_trans here because _should_stop() is only set in |
|
* shutdown and nobody other than ourselves should be able to start |
|
* transactions. committing on shutdown might take a few iterations |
|
* as final transactions put deleted inodes on the list */ |
|
while (!(kthread_should_stop() && |
|
atomic_read(&journal->j_num_trans) == 0)) { |
|
|
|
wait_event_interruptible(osb->checkpoint_event, |
|
atomic_read(&journal->j_num_trans) |
|
|| kthread_should_stop()); |
|
|
|
status = ocfs2_commit_cache(osb); |
|
if (status < 0) { |
|
static unsigned long abort_warn_time; |
|
|
|
/* Warn about this once per minute */ |
|
if (printk_timed_ratelimit(&abort_warn_time, 60*HZ)) |
|
mlog(ML_ERROR, "status = %d, journal is " |
|
"already aborted.\n", status); |
|
/* |
|
* After ocfs2_commit_cache() fails, j_num_trans has a |
|
* non-zero value. Sleep here to avoid a busy-wait |
|
* loop. |
|
*/ |
|
msleep_interruptible(1000); |
|
} |
|
|
|
if (kthread_should_stop() && atomic_read(&journal->j_num_trans)){ |
|
mlog(ML_KTHREAD, |
|
"commit_thread: %u transactions pending on " |
|
"shutdown\n", |
|
atomic_read(&journal->j_num_trans)); |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* Reads all the journal inodes without taking any cluster locks. Used |
|
* for hard readonly access to determine whether any journal requires |
|
* recovery. Also used to refresh the recovery generation numbers after |
|
* a journal has been recovered by another node. |
|
*/ |
|
int ocfs2_check_journals_nolocks(struct ocfs2_super *osb) |
|
{ |
|
int ret = 0; |
|
unsigned int slot; |
|
struct buffer_head *di_bh = NULL; |
|
struct ocfs2_dinode *di; |
|
int journal_dirty = 0; |
|
|
|
for(slot = 0; slot < osb->max_slots; slot++) { |
|
ret = ocfs2_read_journal_inode(osb, slot, &di_bh, NULL); |
|
if (ret) { |
|
mlog_errno(ret); |
|
goto out; |
|
} |
|
|
|
di = (struct ocfs2_dinode *) di_bh->b_data; |
|
|
|
osb->slot_recovery_generations[slot] = |
|
ocfs2_get_recovery_generation(di); |
|
|
|
if (le32_to_cpu(di->id1.journal1.ij_flags) & |
|
OCFS2_JOURNAL_DIRTY_FL) |
|
journal_dirty = 1; |
|
|
|
brelse(di_bh); |
|
di_bh = NULL; |
|
} |
|
|
|
out: |
|
if (journal_dirty) |
|
ret = -EROFS; |
|
return ret; |
|
}
|
|
|