diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ocfs2/journal.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/ocfs2/journal.c | 2209 |
1 files changed, 0 insertions, 2209 deletions
diff --git a/ANDROID_3.4.5/fs/ocfs2/journal.c b/ANDROID_3.4.5/fs/ocfs2/journal.c deleted file mode 100644 index 0a42ae96..00000000 --- a/ANDROID_3.4.5/fs/ocfs2/journal.c +++ /dev/null @@ -1,2209 +0,0 @@ -/* -*- mode: c; c-basic-offset: 8; -*- - * vim: noexpandtab sw=8 ts=8 sts=0: - * - * journal.c - * - * Defines functions of journalling api - * - * Copyright (C) 2003, 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/fs.h> -#include <linux/types.h> -#include <linux/slab.h> -#include <linux/highmem.h> -#include <linux/kthread.h> -#include <linux/time.h> -#include <linux/random.h> - -#include <cluster/masklog.h> - -#include "ocfs2.h" - -#include "alloc.h" -#include "blockcheck.h" -#include "dir.h" -#include "dlmglue.h" -#include "extent_map.h" -#include "heartbeat.h" -#include "inode.h" -#include "journal.h" -#include "localalloc.h" -#include "slot_map.h" -#include "super.h" -#include "sysfile.h" -#include "uptodate.h" -#include "quota.h" - -#include "buffer_head_io.h" -#include "ocfs2_trace.h" - -DEFINE_SPINLOCK(trans_inc_lock); - -#define ORPHAN_SCAN_SCHEDULE_TIMEOUT 300000 - -static int ocfs2_force_read_journal(struct inode *inode); -static int ocfs2_recover_node(struct ocfs2_super *osb, - int node_num, int slot_num); -static int __ocfs2_recovery_thread(void *arg); -static int ocfs2_commit_cache(struct ocfs2_super *osb); -static int __ocfs2_wait_on_mount(struct ocfs2_super *osb, int quota); -static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, - int dirty, int replayed); -static int ocfs2_trylock_journal(struct ocfs2_super *osb, - int slot_num); -static int ocfs2_recover_orphans(struct ocfs2_super *osb, - int slot); -static int ocfs2_commit_thread(void *arg); -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); - -static inline int ocfs2_wait_on_mount(struct ocfs2_super *osb) -{ - return __ocfs2_wait_on_mount(osb, 0); -} - -static inline int ocfs2_wait_on_quotas(struct ocfs2_super *osb) -{ - return __ocfs2_wait_on_mount(osb, 1); -} - -/* - * This replay_map is to track online/offline slots, so we could recover - * offline slots during recovery and mount - */ - -enum ocfs2_replay_state { - REPLAY_UNNEEDED = 0, /* Replay is not needed, so ignore this map */ - REPLAY_NEEDED, /* Replay slots marked in rm_replay_slots */ - REPLAY_DONE /* Replay was already queued */ -}; - -struct ocfs2_replay_map { - unsigned int rm_slots; - enum ocfs2_replay_state rm_state; - unsigned char rm_replay_slots[0]; -}; - -void ocfs2_replay_map_set_state(struct ocfs2_super *osb, int state) -{ - if (!osb->replay_map) - return; - - /* If we've already queued the replay, we don't have any more to do */ - if (osb->replay_map->rm_state == REPLAY_DONE) - return; - - osb->replay_map->rm_state = state; -} - -int ocfs2_compute_replay_slots(struct ocfs2_super *osb) -{ - struct ocfs2_replay_map *replay_map; - int i, node_num; - - /* If replay map is already set, we don't do it again */ - if (osb->replay_map) - return 0; - - replay_map = kzalloc(sizeof(struct ocfs2_replay_map) + - (osb->max_slots * sizeof(char)), GFP_KERNEL); - - if (!replay_map) { - mlog_errno(-ENOMEM); - return -ENOMEM; - } - - spin_lock(&osb->osb_lock); - - replay_map->rm_slots = osb->max_slots; - replay_map->rm_state = REPLAY_UNNEEDED; - - /* set rm_replay_slots for offline slot(s) */ - for (i = 0; i < replay_map->rm_slots; i++) { - if (ocfs2_slot_to_node_num_locked(osb, i, &node_num) == -ENOENT) - replay_map->rm_replay_slots[i] = 1; - } - - osb->replay_map = replay_map; - spin_unlock(&osb->osb_lock); - return 0; -} - -void ocfs2_queue_replay_slots(struct ocfs2_super *osb) -{ - struct ocfs2_replay_map *replay_map = osb->replay_map; - int i; - - if (!replay_map) - return; - - if (replay_map->rm_state != REPLAY_NEEDED) - return; - - for (i = 0; i < replay_map->rm_slots; i++) - if (replay_map->rm_replay_slots[i]) - ocfs2_queue_recovery_completion(osb->journal, i, NULL, - NULL, NULL); - replay_map->rm_state = REPLAY_DONE; -} - -void ocfs2_free_replay_slots(struct ocfs2_super *osb) -{ - struct ocfs2_replay_map *replay_map = osb->replay_map; - - if (!osb->replay_map) - return; - - kfree(replay_map); - osb->replay_map = NULL; -} - -int ocfs2_recovery_init(struct ocfs2_super *osb) -{ - struct ocfs2_recovery_map *rm; - - mutex_init(&osb->recovery_lock); - osb->disable_recovery = 0; - osb->recovery_thread_task = NULL; - init_waitqueue_head(&osb->recovery_event); - - rm = kzalloc(sizeof(struct ocfs2_recovery_map) + - osb->max_slots * sizeof(unsigned int), - GFP_KERNEL); - if (!rm) { - mlog_errno(-ENOMEM); - return -ENOMEM; - } - - rm->rm_entries = (unsigned int *)((char *)rm + - sizeof(struct ocfs2_recovery_map)); - osb->recovery_map = rm; - - return 0; -} - -/* we can't grab the goofy sem lock from inside wait_event, so we use - * memory barriers to make sure that we'll see the null task before - * being woken up */ -static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) -{ - mb(); - return osb->recovery_thread_task != NULL; -} - -void ocfs2_recovery_exit(struct ocfs2_super *osb) -{ - struct ocfs2_recovery_map *rm; - - /* disable any new recovery threads and wait for any currently - * running ones to exit. Do this before setting the vol_state. */ - mutex_lock(&osb->recovery_lock); - osb->disable_recovery = 1; - mutex_unlock(&osb->recovery_lock); - wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); - - /* At this point, we know that no more recovery threads can be - * launched, so wait for any recovery completion work to - * complete. */ - flush_workqueue(ocfs2_wq); - - /* - * Now that recovery is shut down, and the osb is about to be - * freed, the osb_lock is not taken here. - */ - rm = osb->recovery_map; - /* XXX: Should we bug if there are dirty entries? */ - - kfree(rm); -} - -static int __ocfs2_recovery_map_test(struct ocfs2_super *osb, - unsigned int node_num) -{ - int i; - struct ocfs2_recovery_map *rm = osb->recovery_map; - - assert_spin_locked(&osb->osb_lock); - - for (i = 0; i < rm->rm_used; i++) { - if (rm->rm_entries[i] == node_num) - return 1; - } - - return 0; -} - -/* Behaves like test-and-set. Returns the previous value */ -static int ocfs2_recovery_map_set(struct ocfs2_super *osb, - unsigned int node_num) -{ - struct ocfs2_recovery_map *rm = osb->recovery_map; - - spin_lock(&osb->osb_lock); - if (__ocfs2_recovery_map_test(osb, node_num)) { - spin_unlock(&osb->osb_lock); - return 1; - } - - /* XXX: Can this be exploited? Not from o2dlm... */ - BUG_ON(rm->rm_used >= osb->max_slots); - - rm->rm_entries[rm->rm_used] = node_num; - rm->rm_used++; - spin_unlock(&osb->osb_lock); - - return 0; -} - -static void ocfs2_recovery_map_clear(struct ocfs2_super *osb, - unsigned int node_num) -{ - int i; - struct ocfs2_recovery_map *rm = osb->recovery_map; - - spin_lock(&osb->osb_lock); - - for (i = 0; i < rm->rm_used; i++) { - if (rm->rm_entries[i] == node_num) - break; - } - - if (i < rm->rm_used) { - /* XXX: be careful with the pointer math */ - memmove(&(rm->rm_entries[i]), &(rm->rm_entries[i + 1]), - (rm->rm_used - i - 1) * sizeof(unsigned int)); - rm->rm_used--; - } - - spin_unlock(&osb->osb_lock); -} - -static int ocfs2_commit_cache(struct ocfs2_super *osb) -{ - int status = 0; - unsigned int flushed; - struct ocfs2_journal *journal = NULL; - - journal = osb->journal; - - /* Flush all pending commits and checkpoint the journal. */ - down_write(&journal->j_trans_barrier); - - flushed = atomic_read(&journal->j_num_trans); - trace_ocfs2_commit_cache_begin(flushed); - if (flushed == 0) { - up_write(&journal->j_trans_barrier); - goto finally; - } - - jbd2_journal_lock_updates(journal->j_journal); - status = jbd2_journal_flush(journal->j_journal); - jbd2_journal_unlock_updates(journal->j_journal); - if (status < 0) { - up_write(&journal->j_trans_barrier); - mlog_errno(status); - goto finally; - } - - ocfs2_inc_trans_id(journal); - - flushed = atomic_read(&journal->j_num_trans); - atomic_set(&journal->j_num_trans, 0); - up_write(&journal->j_trans_barrier); - - trace_ocfs2_commit_cache_end(journal->j_trans_id, flushed); - - ocfs2_wake_downconvert_thread(osb); - wake_up(&journal->j_checkpointed); -finally: - return status; -} - -handle_t *ocfs2_start_trans(struct ocfs2_super *osb, int max_buffs) -{ - journal_t *journal = osb->journal->j_journal; - handle_t *handle; - - BUG_ON(!osb || !osb->journal->j_journal); - - if (ocfs2_is_hard_readonly(osb)) - return ERR_PTR(-EROFS); - - 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); - - 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); - - mlog_errno(PTR_ERR(handle)); - - if (is_journal_aborted(journal)) { - ocfs2_abort(osb->sb, "Detected aborted journal"); - 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); - - 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 = handle->h_buffer_credits; - - trace_ocfs2_extend_trans(old_nblocks, nblocks); - -#ifdef CONFIG_OCFS2_DEBUG_FS - status = 1; -#else - status = jbd2_journal_extend(handle, nblocks); - 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; -} - -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); - - /* We aren't guaranteed to have the superblock here - but if we - * don't, it'll just crash. */ - ocfs2_error(bh->b_assoc_map->host->i_sb, - "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\n", - (unsigned long long)bh->b_blocknr); - BUG(); - } - - /* 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); - BUG_ON(status); -} - -#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 (inode->i_size < OCFS2_MIN_JOURNAL_SIZE) { - mlog(ML_ERROR, "Journal file size (%lld) is too small!\n", - inode->i_size); - status = -EINVAL; - goto done; - } - - trace_ocfs2_journal_init(inode->i_size, - (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_maxlen); - - *dirty = (le32_to_cpu(di->id1.journal1.ij_flags) & - OCFS2_JOURNAL_DIRTY_FL); - - journal->j_journal = j_journal; - 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); - jbd2_journal_unlock_updates(journal->j_journal); - if (status < 0) - mlog_errno(status); - } - - if (status == 0) { - /* - * 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); - } - - /* Shutdown the kernel journal system */ - jbd2_journal_destroy(journal->j_journal); - 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: - if (inode) - 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); - - 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"); - 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; -#define CONCURRENT_JOURNAL_FILL 32ULL - struct buffer_head *bhs[CONCURRENT_JOURNAL_FILL]; - - memset(bhs, 0, sizeof(struct buffer_head *) * CONCURRENT_JOURNAL_FILL); - - num_blocks = ocfs2_blocks_for_bytes(inode->i_sb, inode->i_size); - 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; - } - - if (p_blocks > CONCURRENT_JOURNAL_FILL) - p_blocks = CONCURRENT_JOURNAL_FILL; - - /* We are reading journal data which should not - * be put in the uptodate cache */ - status = ocfs2_read_blocks_sync(OCFS2_SB(inode->i_sb), - p_blkno, p_blocks, bhs); - if (status < 0) { - mlog_errno(status); - goto bail; - } - - for(i = 0; i < p_blocks; i++) { - brelse(bhs[i]); - bhs[i] = NULL; - } - - v_blkno += p_blocks; - } - -bail: - for(i = 0; i < CONCURRENT_JOURNAL_FILL; i++) - brelse(bhs[i]); - 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; -}; - -/* 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; - 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; - - 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); - 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) -{ - 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. */ - if (la_dinode) - kfree(la_dinode); - - if (tl_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; - - spin_lock(&journal->j_lock); - list_add_tail(&item->lri_list, &journal->j_la_cleanups); - queue_work(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); - ocfs2_schedule_truncate_log_flush(osb, 0); - - osb->local_alloc_copy = NULL; - osb->dirty = 0; - - /* queue to recover orphan slots for all offline slots */ - ocfs2_replay_map_set_state(osb, REPLAY_NEEDED); - ocfs2_queue_replay_slots(osb); - 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); - 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; - - status = ocfs2_wait_on_mount(osb); - if (status < 0) { - goto bail; - } - - rm_quota = kzalloc(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); - - 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. */ - 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 */ - 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); - } - - ocfs2_super_unlock(osb, 1); - - /* queue recovery for offline slots */ - ocfs2_queue_replay_slots(osb); - -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 (rm_quota) - 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); - return 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"); - 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); - 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); - - if (inode) - 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); - - 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: - if (inode) - 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. - */ -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); - /* - * 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 = CURRENT_TIME; -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 */ -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(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 = CURRENT_TIME; - 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(ocfs2_wq, &os->os_orphan_scan_work, - ocfs2_orphan_scan_timeout()); - } -} - -struct ocfs2_orphan_filldir_priv { - struct inode *head; - struct ocfs2_super *osb; -}; - -static int ocfs2_orphan_filldir(void *priv, const char *name, int name_len, - loff_t pos, u64 ino, unsigned type) -{ - struct ocfs2_orphan_filldir_priv *p = priv; - struct inode *iter; - - if (name_len == 1 && !strncmp(".", name, 1)) - return 0; - if (name_len == 2 && !strncmp("..", name, 2)) - 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; - - 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) -{ - int status; - struct inode *orphan_dir_inode = NULL; - struct ocfs2_orphan_filldir_priv priv; - loff_t pos = 0; - - priv.osb = osb; - priv.head = *head; - - 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; - } - - mutex_lock(&orphan_dir_inode->i_mutex); - status = ocfs2_inode_lock(orphan_dir_inode, NULL, 0); - if (status < 0) { - mlog_errno(status); - goto out; - } - - status = ocfs2_dir_foreach(orphan_dir_inode, &pos, &priv, - ocfs2_orphan_filldir); - if (status) { - mlog_errno(status); - goto out_cluster; - } - - *head = priv.head; - -out_cluster: - ocfs2_inode_unlock(orphan_dir_inode, 0); -out: - mutex_unlock(&orphan_dir_inode->i_mutex); - 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) -{ - int ret = 0; - struct inode *inode = NULL; - struct inode *iter; - struct ocfs2_inode_info *oi; - - trace_ocfs2_recover_orphans(slot); - - ocfs2_mark_recovering_orphan_dir(osb, slot); - ret = ocfs2_queue_orphans(osb, slot, &inode); - 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; - - spin_lock(&oi->ip_lock); - /* The remote delete code may have set these on the - * assumption that the other node would wipe them - * successfully. If they are still in the node's - * orphan dir, we need to reset that state. */ - oi->ip_flags &= ~(OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE); - - /* 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) - mlog_errno(status); - - 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; -} |