| /* -*- 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> |
| |
| #define MLOG_MASK_PREFIX ML_JOURNAL |
| #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 "quota.h" |
| |
| #include "buffer_head_io.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; |
| unsigned long old_id; |
| struct ocfs2_journal *journal = NULL; |
| |
| mlog_entry_void(); |
| |
| journal = osb->journal; |
| |
| /* Flush all pending commits and checkpoint the journal. */ |
| down_write(&journal->j_trans_barrier); |
| |
| if (atomic_read(&journal->j_num_trans) == 0) { |
| up_write(&journal->j_trans_barrier); |
| mlog(0, "No transactions for me to flush!\n"); |
| 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; |
| } |
| |
| old_id = 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); |
| |
| mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n", |
| journal->j_trans_id, flushed); |
| |
| ocfs2_wake_downconvert_thread(osb); |
| wake_up(&journal->j_checkpointed); |
| finally: |
| mlog_exit(status); |
| return status; |
| } |
| |
| /* pass it NULL and it will allocate a new handle object for you. If |
| * you pass it a handle however, it may still return error, in which |
| * case it has free'd the passed handle for you. */ |
| 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. extend_trans will either extend the current handle by |
| * nblocks, or commit it and start a new one with nblocks credits. |
| * |
| * 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; |
| |
| BUG_ON(!handle); |
| BUG_ON(!nblocks); |
| |
| mlog_entry_void(); |
| |
| mlog(0, "Trying to extend transaction by %d blocks\n", 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) { |
| mlog(0, |
| "jbd2_journal_extend failed, trying " |
| "jbd2_journal_restart\n"); |
| status = jbd2_journal_restart(handle, nblocks); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| } |
| |
| status = 0; |
| bail: |
| |
| mlog_exit(status); |
| 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_commit_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_commit_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_commit_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_commit = ocfs2_commit_trigger, |
| .t_abort = ocfs2_abort_trigger, |
| }, |
| .ot_offset = offsetof(struct ocfs2_dinode, i_check), |
| }; |
| |
| static struct ocfs2_triggers eb_triggers = { |
| .ot_triggers = { |
| .t_commit = ocfs2_commit_trigger, |
| .t_abort = ocfs2_abort_trigger, |
| }, |
| .ot_offset = offsetof(struct ocfs2_extent_block, h_check), |
| }; |
| |
| static struct ocfs2_triggers gd_triggers = { |
| .ot_triggers = { |
| .t_commit = ocfs2_commit_trigger, |
| .t_abort = ocfs2_abort_trigger, |
| }, |
| .ot_offset = offsetof(struct ocfs2_group_desc, bg_check), |
| }; |
| |
| static struct ocfs2_triggers db_triggers = { |
| .ot_triggers = { |
| .t_commit = ocfs2_db_commit_trigger, |
| .t_abort = ocfs2_abort_trigger, |
| }, |
| }; |
| |
| static struct ocfs2_triggers xb_triggers = { |
| .ot_triggers = { |
| .t_commit = ocfs2_commit_trigger, |
| .t_abort = ocfs2_abort_trigger, |
| }, |
| .ot_offset = offsetof(struct ocfs2_xattr_block, xb_check), |
| }; |
| |
| static struct ocfs2_triggers dq_triggers = { |
| .ot_triggers = { |
| .t_commit = ocfs2_dq_commit_trigger, |
| .t_abort = ocfs2_abort_trigger, |
| }, |
| }; |
| |
| static struct ocfs2_triggers dr_triggers = { |
| .ot_triggers = { |
| .t_commit = ocfs2_commit_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_commit = ocfs2_commit_trigger, |
| .t_abort = ocfs2_abort_trigger, |
| }, |
| .ot_offset = offsetof(struct ocfs2_dx_leaf, dl_check), |
| }; |
| |
| static int __ocfs2_journal_access(handle_t *handle, |
| struct inode *inode, |
| struct buffer_head *bh, |
| struct ocfs2_triggers *triggers, |
| int type) |
| { |
| int status; |
| |
| BUG_ON(!inode); |
| BUG_ON(!handle); |
| BUG_ON(!bh); |
| |
| mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %zu\n", |
| (unsigned long long)bh->b_blocknr, type, |
| (type == OCFS2_JOURNAL_ACCESS_CREATE) ? |
| "OCFS2_JOURNAL_ACCESS_CREATE" : |
| "OCFS2_JOURNAL_ACCESS_WRITE", |
| 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 inode so |
| * that the locking code knows whether it can drop it's locks |
| * on this inode 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_inode_lock_trans(OCFS2_SB(inode->i_sb)->journal, inode); |
| |
| mutex_lock(&OCFS2_I(inode)->ip_io_mutex); |
| 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, "Uknown access type!\n"); |
| } |
| if (!status && ocfs2_meta_ecc(OCFS2_SB(inode->i_sb)) && triggers) |
| jbd2_journal_set_triggers(bh, &triggers->ot_triggers); |
| mutex_unlock(&OCFS2_I(inode)->ip_io_mutex); |
| |
| if (status < 0) |
| mlog(ML_ERROR, "Error %d getting %d access to buffer!\n", |
| status, type); |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| int ocfs2_journal_access_di(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &di_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access_eb(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &eb_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access_gd(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &gd_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access_db(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &db_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access_xb(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &xb_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access_dq(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &dq_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access_dr(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &dr_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access_dl(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, &dl_triggers, |
| type); |
| } |
| |
| int ocfs2_journal_access(handle_t *handle, struct inode *inode, |
| struct buffer_head *bh, int type) |
| { |
| return __ocfs2_journal_access(handle, inode, bh, NULL, type); |
| } |
| |
| int ocfs2_journal_dirty(handle_t *handle, |
| struct buffer_head *bh) |
| { |
| int status; |
| |
| mlog_entry("(bh->b_blocknr=%llu)\n", |
| (unsigned long long)bh->b_blocknr); |
| |
| status = jbd2_journal_dirty_metadata(handle, bh); |
| if (status < 0) |
| mlog(ML_ERROR, "Could not dirty metadata buffer. " |
| "(bh->b_blocknr=%llu)\n", |
| (unsigned long long)bh->b_blocknr); |
| |
| mlog_exit(status); |
| return 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; |
| |
| spin_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; |
| spin_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; |
| |
| mlog_entry_void(); |
| |
| 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; |
| } |
| |
| mlog(0, "inode->i_size = %lld\n", inode->i_size); |
| mlog(0, "inode->i_blocks = %llu\n", |
| (unsigned long long)inode->i_blocks); |
| mlog(0, "inode->ip_clusters = %u\n", 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; |
| } |
| |
| mlog(0, "Returned from jbd2_journal_init_inode\n"); |
| mlog(0, "j_journal->j_maxlen = %u\n", 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); |
| } |
| } |
| |
| mlog_exit(status); |
| 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; |
| |
| mlog_entry_void(); |
| |
| 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); |
| |
| mlog_exit(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; |
| |
| mlog_entry_void(); |
| |
| 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)); |
| if (num_running_trans > 0) |
| mlog(0, "Shutting down journal: must wait on %d " |
| "running transactions!\n", |
| 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 */ |
| mlog(0, "Waiting for ocfs2commit to exit....\n"); |
| 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); |
| mlog_exit_void(); |
| } |
| |
| 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; |
| |
| mlog_entry_void(); |
| |
| 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: |
| mlog_exit(status); |
| 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; |
| |
| mlog_entry_void(); |
| |
| 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: |
| mlog_exit(status); |
| 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]; |
| |
| mlog_entry_void(); |
| |
| 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]); |
| mlog_exit(status); |
| 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; |
| 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); |
| |
| mlog_entry_void(); |
| |
| mlog(0, "completing recovery from keventd\n"); |
| |
| 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); |
| |
| mlog(0, "Complete recovery for slot %d\n", item->lri_slot); |
| |
| ocfs2_wait_on_quotas(osb); |
| |
| la_dinode = item->lri_la_dinode; |
| if (la_dinode) { |
| mlog(0, "Clean up local alloc %llu\n", |
| (unsigned long long)le64_to_cpu(la_dinode->i_blkno)); |
| |
| ret = ocfs2_complete_local_alloc_recovery(osb, |
| la_dinode); |
| if (ret < 0) |
| mlog_errno(ret); |
| |
| kfree(la_dinode); |
| } |
| |
| tl_dinode = item->lri_tl_dinode; |
| if (tl_dinode) { |
| mlog(0, "Clean up truncate log %llu\n", |
| (unsigned long long)le64_to_cpu(tl_dinode->i_blkno)); |
| |
| 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); |
| |
| qrec = item->lri_qrec; |
| if (qrec) { |
| mlog(0, "Recovering quota files"); |
| ret = ocfs2_finish_quota_recovery(osb, qrec, |
| item->lri_slot); |
| if (ret < 0) |
| mlog_errno(ret); |
| /* Recovery info is already freed now */ |
| } |
| |
| kfree(item); |
| } |
| |
| mlog(0, "Recovery completion\n"); |
| mlog_exit_void(); |
| } |
| |
| /* 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; |
| |
| /* 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; |
| |
| mlog_entry_void(); |
| |
| 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); |
| mlog(0, "checking node %d\n", node_num); |
| slot_num = ocfs2_node_num_to_slot(osb, node_num); |
| if (slot_num == -ENOENT) { |
| status = 0; |
| mlog(0, "no slot for this node, so no recovery" |
| "required.\n"); |
| goto skip_recovery; |
| } |
| mlog(0, "node %d was using slot %d\n", node_num, slot_num); |
| |
| /* 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); |
| mlog(0, "All nodes recovered\n"); |
| |
| /* 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 noone 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); |
| |
| mlog_exit(status); |
| /* 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) |
| { |
| mlog_entry("(node_num=%d, osb->node_num = %d)\n", |
| node_num, osb->node_num); |
| |
| mutex_lock(&osb->recovery_lock); |
| if (osb->disable_recovery) |
| goto out; |
| |
| /* People waiting on recovery will wait on |
| * the recovery map to empty. */ |
| if (ocfs2_recovery_map_set(osb, node_num)) |
| mlog(0, "node %d already in recovery map.\n", node_num); |
| |
| mlog(0, "starting recovery thread...\n"); |
| |
| 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); |
| |
| mlog_exit_void(); |
| } |
| |
| 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) { |
| mlog(0, "Slot %u already recovered (old/new=%u/%u)\n", 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) { |
| mlog(0, "status returned from ocfs2_inode_lock=%d\n", 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)) { |
| mlog(0, "No recovery required for node %d\n", 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); |
| |
| mlog(ML_NOTICE, "Recovering node %d from 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; |
| } |
| |
| mlog(0, "calling journal_init_inode\n"); |
| 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 */ |
| mlog(0, "flushing the journal.\n"); |
| 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); |
| |
| done: |
| /* drop the lock on this nodes journal */ |
| if (got_lock) |
| ocfs2_inode_unlock(inode, 1); |
| |
| if (inode) |
| iput(inode); |
| |
| brelse(bh); |
| |
| mlog_exit(status); |
| 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; |
| |
| mlog_entry("(node_num=%d, slot_num=%d, osb->node_num = %d)\n", |
| 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) { |
| mlog(0, "Skipping recovery for slot %u (node %u) " |
| "as another node has recovered it\n", 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: |
| |
| mlog_exit(status); |
| 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; |
| |
| mlog(0, "Slot %u recovery generation is %u\n", 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: |
| mlog_exit(status); |
| 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. |
| * |
| * 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; |
| |
| 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: |
| 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) |
| schedule_delayed_work(&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); |
| schedule_delayed_work(&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; |
| |
| mlog(0, "queue orphan %llu\n", |
| (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; |
| |
| mlog(0, "Recover inodes from orphan dir in slot %d\n", 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); |
| mlog(0, "iput orphan %llu\n", (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) { |
| 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; |
| } |