From 58c4e173847af8e63537e11be6c1c3fd4b6153fe Mon Sep 17 00:00:00 2001 From: David Sterba Date: Thu, 11 Feb 2016 10:49:42 +0100 Subject: btrfs: scrub: use GFP_KERNEL on the submission path Scrub is not on the critical writeback path we don't need to use GFP_NOFS for all allocations. The failures are handled and stats passed back to userspace. Let's use GFP_KERNEL on the paths where everything is ok, ie. setup the global structures and the IO submission paths. Functions that do the repair and fixups still use GFP_NOFS as we might want to skip any other filesystem activity if we encounter an error. This could turn out to be unnecessary, but requires more review compared to the easy cases in this patch. Signed-off-by: David Sterba --- fs/btrfs/dev-replace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/btrfs/dev-replace.c') diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index cbb7dbfb3fff..01ce5fcecc5c 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -802,7 +802,7 @@ static int btrfs_dev_replace_kthread(void *data) struct btrfs_ioctl_dev_replace_args *status_args; u64 progress; - status_args = kzalloc(sizeof(*status_args), GFP_NOFS); + status_args = kzalloc(sizeof(*status_args), GFP_KERNEL); if (status_args) { btrfs_dev_replace_status(fs_info, status_args); progress = status_args->status.progress_1000; -- cgit From 73beece9ca07c003e0e4f4825b12be167334d4ad Mon Sep 17 00:00:00 2001 From: Liu Bo Date: Fri, 17 Jul 2015 16:49:19 +0800 Subject: Btrfs: fix lockdep deadlock warning due to dev_replace Xfstests btrfs/011 complains about a deadlock warning, [ 1226.649039] ========================================================= [ 1226.649039] [ INFO: possible irq lock inversion dependency detected ] [ 1226.649039] 4.1.0+ #270 Not tainted [ 1226.649039] --------------------------------------------------------- [ 1226.652955] kswapd0/46 just changed the state of lock: [ 1226.652955] (&delayed_node->mutex){+.+.-.}, at: [] __btrfs_release_delayed_node+0x45/0x1d0 [ 1226.652955] but this lock took another, RECLAIM_FS-unsafe lock in the past: [ 1226.652955] (&fs_info->dev_replace.lock){+.+.+.} and interrupts could create inverse lock ordering between them. [ 1226.652955] other info that might help us debug this: [ 1226.652955] Chain exists of: &delayed_node->mutex --> &found->groups_sem --> &fs_info->dev_replace.lock [ 1226.652955] Possible interrupt unsafe locking scenario: [ 1226.652955] CPU0 CPU1 [ 1226.652955] ---- ---- [ 1226.652955] lock(&fs_info->dev_replace.lock); [ 1226.652955] local_irq_disable(); [ 1226.652955] lock(&delayed_node->mutex); [ 1226.652955] lock(&found->groups_sem); [ 1226.652955] [ 1226.652955] lock(&delayed_node->mutex); [ 1226.652955] *** DEADLOCK *** Commit 084b6e7c7607 ("btrfs: Fix a lockdep warning when running xfstest.") tried to fix a similar one that has the exactly same warning, but with that, we still run to this. The above lock chain comes from btrfs_commit_transaction ->btrfs_run_delayed_items ... ->__btrfs_update_delayed_inode ... ->__btrfs_cow_block ... ->find_free_extent ->cache_block_group ->load_free_space_cache ->btrfs_readpages ->submit_one_bio ... ->__btrfs_map_block ->btrfs_dev_replace_lock However, with high memory pressure, tasks which hold dev_replace.lock can be interrupted by kswapd and then kswapd is intended to release memory occupied by superblock, inodes and dentries, where we may call evict_inode, and it comes to [ 1226.652955] [] __btrfs_release_delayed_node+0x45/0x1d0 [ 1226.652955] [] btrfs_remove_delayed_node+0x24/0x30 [ 1226.652955] [] btrfs_evict_inode+0x34e/0x700 delayed_node->mutex may be acquired in __btrfs_release_delayed_node(), and it leads to a ABBA deadlock. To fix this, we can use "blocking rwlock" used in the case of extent_buffer, but things are simpler here since we only needs read's spinlock to blocking lock. With this, btrfs/011 no more produces warnings in dmesg. Signed-off-by: Liu Bo Signed-off-by: David Sterba --- fs/btrfs/ctree.h | 6 ++- fs/btrfs/dev-replace.c | 130 ++++++++++++++++++++++++++----------------------- fs/btrfs/dev-replace.h | 7 ++- fs/btrfs/disk-io.c | 6 ++- fs/btrfs/reada.c | 10 ++-- fs/btrfs/scrub.c | 6 +-- fs/btrfs/volumes.c | 24 +++++---- 7 files changed, 105 insertions(+), 84 deletions(-) (limited to 'fs/btrfs/dev-replace.c') diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index bfe4a337fb4d..0b427a6966ad 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1002,8 +1002,10 @@ struct btrfs_dev_replace { pid_t lock_owner; atomic_t nesting_level; struct mutex lock_finishing_cancel_unmount; - struct mutex lock_management_lock; - struct mutex lock; + rwlock_t lock; + atomic_t read_locks; + atomic_t blocking_readers; + wait_queue_head_t read_lock_wq; struct btrfs_scrub_progress scrub_progress; }; diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index cbb7dbfb3fff..8c8b48971bc7 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -202,13 +202,13 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans, struct btrfs_dev_replace_item *ptr; struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 0); if (!dev_replace->is_valid || !dev_replace->item_needs_writeback) { - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 0); return 0; } - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 0); key.objectid = 0; key.type = BTRFS_DEV_REPLACE_KEY; @@ -264,7 +264,7 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans, ptr = btrfs_item_ptr(eb, path->slots[0], struct btrfs_dev_replace_item); - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 1); if (dev_replace->srcdev) btrfs_set_dev_replace_src_devid(eb, ptr, dev_replace->srcdev->devid); @@ -287,7 +287,7 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans, btrfs_set_dev_replace_cursor_right(eb, ptr, dev_replace->cursor_right); dev_replace->item_needs_writeback = 0; - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); btrfs_mark_buffer_dirty(eb); @@ -356,7 +356,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root, return PTR_ERR(trans); } - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 1); switch (dev_replace->replace_state) { case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: @@ -395,7 +395,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root, dev_replace->is_valid = 1; dev_replace->item_needs_writeback = 1; args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR; - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); ret = btrfs_sysfs_add_device_link(tgt_device->fs_devices, tgt_device); if (ret) @@ -407,7 +407,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root, trans = btrfs_start_transaction(root, 0); if (IS_ERR(trans)) { ret = PTR_ERR(trans); - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 1); goto leave; } @@ -433,7 +433,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root, leave: dev_replace->srcdev = NULL; dev_replace->tgtdev = NULL; - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device); return ret; } @@ -471,18 +471,18 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, /* don't allow cancel or unmount to disturb the finishing procedure */ mutex_lock(&dev_replace->lock_finishing_cancel_unmount); - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 0); /* was the operation canceled, or is it finished? */ if (dev_replace->replace_state != BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED) { - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 0); mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); return 0; } tgt_device = dev_replace->tgtdev; src_device = dev_replace->srcdev; - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 0); /* * flush all outstanding I/O and inode extent mappings before the @@ -507,7 +507,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, /* keep away write_all_supers() during the finishing procedure */ mutex_lock(&root->fs_info->fs_devices->device_list_mutex); mutex_lock(&root->fs_info->chunk_mutex); - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 1); dev_replace->replace_state = scrub_ret ? BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED : BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED; @@ -528,7 +528,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, rcu_str_deref(src_device->name), src_device->devid, rcu_str_deref(tgt_device->name), scrub_ret); - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); mutex_unlock(&root->fs_info->chunk_mutex); mutex_unlock(&root->fs_info->fs_devices->device_list_mutex); mutex_unlock(&uuid_mutex); @@ -565,7 +565,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info, list_add(&tgt_device->dev_alloc_list, &fs_info->fs_devices->alloc_list); fs_info->fs_devices->rw_devices++; - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); btrfs_rm_dev_replace_blocked(fs_info); @@ -649,7 +649,7 @@ void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info, struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; struct btrfs_device *srcdev; - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 0); /* even if !dev_replace_is_valid, the values are good enough for * the replace_status ioctl */ args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR; @@ -675,7 +675,7 @@ void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info, div_u64(btrfs_device_get_total_bytes(srcdev), 1000)); break; } - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 0); } int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info, @@ -698,13 +698,13 @@ static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info) return -EROFS; mutex_lock(&dev_replace->lock_finishing_cancel_unmount); - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 1); switch (dev_replace->replace_state) { case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED; - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); goto leave; case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED: @@ -717,7 +717,7 @@ static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info) dev_replace->replace_state = BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED; dev_replace->time_stopped = get_seconds(); dev_replace->item_needs_writeback = 1; - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); btrfs_scrub_cancel(fs_info); trans = btrfs_start_transaction(root, 0); @@ -740,7 +740,7 @@ void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info) struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; mutex_lock(&dev_replace->lock_finishing_cancel_unmount); - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 1); switch (dev_replace->replace_state) { case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: @@ -756,7 +756,7 @@ void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info) break; } - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); mutex_unlock(&dev_replace->lock_finishing_cancel_unmount); } @@ -766,12 +766,12 @@ int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info) struct task_struct *task; struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace; - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 1); switch (dev_replace->replace_state) { case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED: case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED: case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED: - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); return 0; case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED: break; @@ -784,10 +784,10 @@ int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info) btrfs_info(fs_info, "cannot continue dev_replace, tgtdev is missing"); btrfs_info(fs_info, "you may cancel the operation after 'mount -o degraded'"); - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); return 0; } - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 1); WARN_ON(atomic_xchg( &fs_info->mutually_exclusive_operation_running, 1)); @@ -865,48 +865,58 @@ int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace) return 1; } -void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace) +void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace, int rw) { - /* the beginning is just an optimization for the typical case */ - if (atomic_read(&dev_replace->nesting_level) == 0) { -acquire_lock: - /* this is not a nested case where the same thread - * is trying to acqurire the same lock twice */ - mutex_lock(&dev_replace->lock); - mutex_lock(&dev_replace->lock_management_lock); - dev_replace->lock_owner = current->pid; - atomic_inc(&dev_replace->nesting_level); - mutex_unlock(&dev_replace->lock_management_lock); - return; + if (rw == 1) { + /* write */ +again: + wait_event(dev_replace->read_lock_wq, + atomic_read(&dev_replace->blocking_readers) == 0); + write_lock(&dev_replace->lock); + if (atomic_read(&dev_replace->blocking_readers)) { + write_unlock(&dev_replace->lock); + goto again; + } + } else { + read_lock(&dev_replace->lock); + atomic_inc(&dev_replace->read_locks); } +} - mutex_lock(&dev_replace->lock_management_lock); - if (atomic_read(&dev_replace->nesting_level) > 0 && - dev_replace->lock_owner == current->pid) { - WARN_ON(!mutex_is_locked(&dev_replace->lock)); - atomic_inc(&dev_replace->nesting_level); - mutex_unlock(&dev_replace->lock_management_lock); - return; +void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace, int rw) +{ + if (rw == 1) { + /* write */ + ASSERT(atomic_read(&dev_replace->blocking_readers) == 0); + write_unlock(&dev_replace->lock); + } else { + ASSERT(atomic_read(&dev_replace->read_locks) > 0); + atomic_dec(&dev_replace->read_locks); + read_unlock(&dev_replace->lock); } +} - mutex_unlock(&dev_replace->lock_management_lock); - goto acquire_lock; +/* inc blocking cnt and release read lock */ +void btrfs_dev_replace_set_lock_blocking( + struct btrfs_dev_replace *dev_replace) +{ + /* only set blocking for read lock */ + ASSERT(atomic_read(&dev_replace->read_locks) > 0); + atomic_inc(&dev_replace->blocking_readers); + read_unlock(&dev_replace->lock); } -void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace) +/* acquire read lock and dec blocking cnt */ +void btrfs_dev_replace_clear_lock_blocking( + struct btrfs_dev_replace *dev_replace) { - WARN_ON(!mutex_is_locked(&dev_replace->lock)); - mutex_lock(&dev_replace->lock_management_lock); - WARN_ON(atomic_read(&dev_replace->nesting_level) < 1); - WARN_ON(dev_replace->lock_owner != current->pid); - atomic_dec(&dev_replace->nesting_level); - if (atomic_read(&dev_replace->nesting_level) == 0) { - dev_replace->lock_owner = 0; - mutex_unlock(&dev_replace->lock_management_lock); - mutex_unlock(&dev_replace->lock); - } else { - mutex_unlock(&dev_replace->lock_management_lock); - } + /* only set blocking for read lock */ + ASSERT(atomic_read(&dev_replace->read_locks) > 0); + ASSERT(atomic_read(&dev_replace->blocking_readers) > 0); + read_lock(&dev_replace->lock); + if (atomic_dec_and_test(&dev_replace->blocking_readers) && + waitqueue_active(&dev_replace->read_lock_wq)) + wake_up(&dev_replace->read_lock_wq); } void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info) diff --git a/fs/btrfs/dev-replace.h b/fs/btrfs/dev-replace.h index 20035cbbf021..29e3ef5f96bd 100644 --- a/fs/btrfs/dev-replace.h +++ b/fs/btrfs/dev-replace.h @@ -34,8 +34,11 @@ int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info, void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info); int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info); int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace); -void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace); -void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace); +void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace, int rw); +void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace, int rw); +void btrfs_dev_replace_set_lock_blocking(struct btrfs_dev_replace *dev_replace); +void btrfs_dev_replace_clear_lock_blocking( + struct btrfs_dev_replace *dev_replace); static inline void btrfs_dev_replace_stats_inc(atomic64_t *stat_value) { diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 4545e2e2ad45..81d0f39c2266 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2272,9 +2272,11 @@ static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info) fs_info->dev_replace.lock_owner = 0; atomic_set(&fs_info->dev_replace.nesting_level, 0); mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount); - mutex_init(&fs_info->dev_replace.lock_management_lock); - mutex_init(&fs_info->dev_replace.lock); + rwlock_init(&fs_info->dev_replace.lock); + atomic_set(&fs_info->dev_replace.read_locks, 0); + atomic_set(&fs_info->dev_replace.blocking_readers, 0); init_waitqueue_head(&fs_info->replace_wait); + init_waitqueue_head(&fs_info->dev_replace.read_lock_wq); } static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info) diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c index 619f92963e27..fe3d4c7b6342 100644 --- a/fs/btrfs/reada.c +++ b/fs/btrfs/reada.c @@ -396,7 +396,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, } /* insert extent in reada_tree + all per-device trees, all or nothing */ - btrfs_dev_replace_lock(&fs_info->dev_replace); + btrfs_dev_replace_lock(&fs_info->dev_replace, 0); spin_lock(&fs_info->reada_lock); ret = radix_tree_insert(&fs_info->reada_tree, index, re); if (ret == -EEXIST) { @@ -404,12 +404,12 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, BUG_ON(!re_exist); re_exist->refcnt++; spin_unlock(&fs_info->reada_lock); - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); goto error; } if (ret) { spin_unlock(&fs_info->reada_lock); - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); goto error; } prev_dev = NULL; @@ -456,12 +456,12 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root, BUG_ON(fs_info == NULL); radix_tree_delete(&fs_info->reada_tree, index); spin_unlock(&fs_info->reada_lock); - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); goto error; } } spin_unlock(&fs_info->reada_lock); - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); btrfs_put_bbio(bbio); return re; diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 92bf5ee732fb..4151792ff556 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -3857,16 +3857,16 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, return -EIO; } - btrfs_dev_replace_lock(&fs_info->dev_replace); + btrfs_dev_replace_lock(&fs_info->dev_replace, 0); if (dev->scrub_device || (!is_dev_replace && btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))) { - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); mutex_unlock(&fs_info->scrub_lock); mutex_unlock(&fs_info->fs_devices->device_list_mutex); return -EINPROGRESS; } - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); ret = scrub_workers_get(fs_info, is_dev_replace); if (ret) { diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 366b335946fa..858a2e489977 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1714,12 +1714,12 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path) } while (read_seqretry(&root->fs_info->profiles_lock, seq)); num_devices = root->fs_info->fs_devices->num_devices; - btrfs_dev_replace_lock(&root->fs_info->dev_replace); + btrfs_dev_replace_lock(&root->fs_info->dev_replace, 0); if (btrfs_dev_replace_is_ongoing(&root->fs_info->dev_replace)) { WARN_ON(num_devices < 1); num_devices--; } - btrfs_dev_replace_unlock(&root->fs_info->dev_replace); + btrfs_dev_replace_unlock(&root->fs_info->dev_replace, 0); if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices <= 4) { ret = BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET; @@ -3686,12 +3686,12 @@ int btrfs_balance(struct btrfs_balance_control *bctl, } num_devices = fs_info->fs_devices->num_devices; - btrfs_dev_replace_lock(&fs_info->dev_replace); + btrfs_dev_replace_lock(&fs_info->dev_replace, 0); if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) { BUG_ON(num_devices < 1); num_devices--; } - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE; if (num_devices == 1) allowed |= BTRFS_BLOCK_GROUP_DUP; @@ -5062,10 +5062,10 @@ int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len) ret = 1; free_extent_map(em); - btrfs_dev_replace_lock(&fs_info->dev_replace); + btrfs_dev_replace_lock(&fs_info->dev_replace, 0); if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) ret++; - btrfs_dev_replace_unlock(&fs_info->dev_replace); + btrfs_dev_replace_unlock(&fs_info->dev_replace, 0); return ret; } @@ -5325,10 +5325,12 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, if (!bbio_ret) goto out; - btrfs_dev_replace_lock(dev_replace); + btrfs_dev_replace_lock(dev_replace, 0); dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace); if (!dev_replace_is_ongoing) - btrfs_dev_replace_unlock(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 0); + else + btrfs_dev_replace_set_lock_blocking(dev_replace); if (dev_replace_is_ongoing && mirror_num == map->num_stripes + 1 && !(rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) && @@ -5751,8 +5753,10 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, bbio->mirror_num = map->num_stripes + 1; } out: - if (dev_replace_is_ongoing) - btrfs_dev_replace_unlock(dev_replace); + if (dev_replace_is_ongoing) { + btrfs_dev_replace_clear_lock_blocking(dev_replace); + btrfs_dev_replace_unlock(dev_replace, 0); + } free_extent_map(em); return ret; } -- cgit From bb7ab3b92e46da06b580c6f83abe7894dc449cca Mon Sep 17 00:00:00 2001 From: Adam Buchbinder Date: Fri, 4 Mar 2016 11:23:12 -0800 Subject: btrfs: Fix misspellings in comments. Signed-off-by: Adam Buchbinder Signed-off-by: David Sterba --- fs/btrfs/check-integrity.c | 2 +- fs/btrfs/ctree.h | 10 +++++----- fs/btrfs/dev-replace.c | 2 +- fs/btrfs/disk-io.c | 2 +- fs/btrfs/extent-tree.c | 2 +- fs/btrfs/extent_map.c | 4 ++-- fs/btrfs/file.c | 2 +- fs/btrfs/ordered-data.c | 2 +- fs/btrfs/tree-log.c | 2 +- fs/btrfs/volumes.c | 4 ++-- 10 files changed, 16 insertions(+), 16 deletions(-) (limited to 'fs/btrfs/dev-replace.c') diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 9d226b5d6358..e34a71b3e225 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -178,7 +178,7 @@ struct btrfsic_block { * Elements of this type are allocated dynamically and required because * each block object can refer to and can be ref from multiple blocks. * The key to lookup them in the hashtable is the dev_bytenr of - * the block ref to plus the one from the block refered from. + * the block ref to plus the one from the block referred from. * The fact that they are searchable via a hashtable and that a * ref_cnt is maintained is not required for the btrfs integrity * check algorithm itself, it is only used to make the output more diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0ef28fd2bd27..84a6a5b3384a 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -788,7 +788,7 @@ struct btrfs_root_item { /* * This generation number is used to test if the new fields are valid - * and up to date while reading the root item. Everytime the root item + * and up to date while reading the root item. Every time the root item * is written out, the "generation" field is copied into this field. If * anyone ever mounted the fs with an older kernel, we will have * mismatching generation values here and thus must invalidate the @@ -1219,10 +1219,10 @@ struct btrfs_space_info { * we've called update_block_group and dropped the bytes_used counter * and increased the bytes_pinned counter. However this means that * bytes_pinned does not reflect the bytes that will be pinned once the - * delayed refs are flushed, so this counter is inc'ed everytime we call - * btrfs_free_extent so it is a realtime count of what will be freed - * once the transaction is committed. It will be zero'ed everytime the - * transaction commits. + * delayed refs are flushed, so this counter is inc'ed every time we + * call btrfs_free_extent so it is a realtime count of what will be + * freed once the transaction is committed. It will be zero'ed every + * time the transaction commits. */ struct percpu_counter total_bytes_pinned; diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c index ff2db7a6c894..a1d6652e0c47 100644 --- a/fs/btrfs/dev-replace.c +++ b/fs/btrfs/dev-replace.c @@ -858,7 +858,7 @@ int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace) * not called and the the filesystem is remounted * in degraded state. This does not stop the * dev_replace procedure. It needs to be canceled - * manually if the cancelation is wanted. + * manually if the cancellation is wanted. */ break; } diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 53525a54608b..c95e3ce9f22e 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -816,7 +816,7 @@ static void run_one_async_done(struct btrfs_work *work) waitqueue_active(&fs_info->async_submit_wait)) wake_up(&fs_info->async_submit_wait); - /* If an error occured we just want to clean up the bio and move on */ + /* If an error occurred we just want to clean up the bio and move on */ if (async->error) { async->bio->bi_error = async->error; bio_endio(async->bio); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 083783b53536..53e12977bfd0 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -5758,7 +5758,7 @@ out_fail: /* * This is tricky, but first we need to figure out how much we - * free'd from any free-ers that occured during this + * free'd from any free-ers that occurred during this * reservation, so we reset ->csum_bytes to the csum_bytes * before we dropped our lock, and then call the free for the * number of bytes that were freed while we were trying our diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index cca21ff6553b..318b048eb254 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -62,7 +62,7 @@ struct extent_map *alloc_extent_map(void) /** * free_extent_map - drop reference count of an extent_map - * @em: extent map beeing releasead + * @em: extent map being releasead * * Drops the reference out on @em by one and free the structure * if the reference count hits zero. @@ -422,7 +422,7 @@ struct extent_map *search_extent_mapping(struct extent_map_tree *tree, /** * remove_extent_mapping - removes an extent_map from the extent tree * @tree: extent tree to remove from - * @em: extent map beeing removed + * @em: extent map being removed * * Removes @em from @tree. No reference counts are dropped, and no checks * are done to see if the range is in use diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index dba5de6cdc8a..15a09cb156ce 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1847,7 +1847,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb, /* * We also have to set last_sub_trans to the current log transid, * otherwise subsequent syncs to a file that's been synced in this - * transaction will appear to have already occured. + * transaction will appear to have already occurred. */ spin_lock(&BTRFS_I(inode)->lock); BTRFS_I(inode)->last_sub_trans = root->log_transid; diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 86e1688c13b2..0de7da5a610d 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -1010,7 +1010,7 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset, for (; node; node = rb_prev(node)) { test = rb_entry(node, struct btrfs_ordered_extent, rb_node); - /* We treat this entry as if it doesnt exist */ + /* We treat this entry as if it doesn't exist */ if (test_bit(BTRFS_ORDERED_UPDATED_ISIZE, &test->flags)) continue; if (test->file_offset + test->len <= disk_i_size) diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index eafdb965c206..24d03c751149 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -1046,7 +1046,7 @@ again: /* * NOTE: we have searched root tree and checked the - * coresponding ref, it does not need to check again. + * corresponding ref, it does not need to check again. */ *search_done = 1; } diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 80857b4646c0..e2b54d546b7c 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -2749,7 +2749,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans, em->start + em->len < chunk_offset) { /* * This is a logic error, but we don't want to just rely on the - * user having built with ASSERT enabled, so if ASSERT doens't + * user having built with ASSERT enabled, so if ASSERT doesn't * do anything we still error out. */ ASSERT(0); @@ -4119,7 +4119,7 @@ out: * Callback for btrfs_uuid_tree_iterate(). * returns: * 0 check succeeded, the entry is not outdated. - * < 0 if an error occured. + * < 0 if an error occurred. * > 0 if the check failed, which means the caller shall remove the entry. */ static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info, -- cgit