diff options
Diffstat (limited to 'drivers/md/raid5-cache.c')
-rw-r--r-- | drivers/md/raid5-cache.c | 95 |
1 files changed, 53 insertions, 42 deletions
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c index 0b7406ac8ce1..3c65f52b68f5 100644 --- a/drivers/md/raid5-cache.c +++ b/drivers/md/raid5-cache.c @@ -23,7 +23,7 @@ #include <linux/types.h> #include "md.h" #include "raid5.h" -#include "bitmap.h" +#include "md-bitmap.h" #include "raid5-log.h" /* @@ -539,7 +539,7 @@ static void r5l_log_run_stripes(struct r5l_log *log) { struct r5l_io_unit *io, *next; - assert_spin_locked(&log->io_list_lock); + lockdep_assert_held(&log->io_list_lock); list_for_each_entry_safe(io, next, &log->running_ios, log_sibling) { /* don't change list order */ @@ -555,7 +555,7 @@ static void r5l_move_to_end_ios(struct r5l_log *log) { struct r5l_io_unit *io, *next; - assert_spin_locked(&log->io_list_lock); + lockdep_assert_held(&log->io_list_lock); list_for_each_entry_safe(io, next, &log->running_ios, log_sibling) { /* don't change list order */ @@ -693,6 +693,8 @@ static void r5c_disable_writeback_async(struct work_struct *work) struct r5l_log *log = container_of(work, struct r5l_log, disable_writeback_work); struct mddev *mddev = log->rdev->mddev; + struct r5conf *conf = mddev->private; + int locked = 0; if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) return; @@ -701,11 +703,15 @@ static void r5c_disable_writeback_async(struct work_struct *work) /* wait superblock change before suspend */ wait_event(mddev->sb_wait, - !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags)); - - mddev_suspend(mddev); - log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; - mddev_resume(mddev); + conf->log == NULL || + (!test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags) && + (locked = mddev_trylock(mddev)))); + if (locked) { + mddev_suspend(mddev); + log->r5c_journal_mode = R5C_JOURNAL_MODE_WRITE_THROUGH; + mddev_resume(mddev); + mddev_unlock(mddev); + } } static void r5l_submit_current_io(struct r5l_log *log) @@ -1105,9 +1111,6 @@ void r5l_write_stripe_run(struct r5l_log *log) int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio) { - if (!log) - return -ENODEV; - if (log->r5c_journal_mode == R5C_JOURNAL_MODE_WRITE_THROUGH) { /* * in write through (journal only) @@ -1194,7 +1197,7 @@ static void r5l_run_no_mem_stripe(struct r5l_log *log) { struct stripe_head *sh; - assert_spin_locked(&log->io_list_lock); + lockdep_assert_held(&log->io_list_lock); if (!list_empty(&log->no_mem_stripes)) { sh = list_first_entry(&log->no_mem_stripes, @@ -1210,7 +1213,7 @@ static bool r5l_complete_finished_ios(struct r5l_log *log) struct r5l_io_unit *io, *next; bool found = false; - assert_spin_locked(&log->io_list_lock); + lockdep_assert_held(&log->io_list_lock); list_for_each_entry_safe(io, next, &log->finished_ios, log_sibling) { /* don't change list order */ @@ -1382,7 +1385,7 @@ static void r5c_flush_stripe(struct r5conf *conf, struct stripe_head *sh) * raid5_release_stripe() while holding conf->device_lock */ BUG_ON(test_bit(STRIPE_ON_RELEASE_LIST, &sh->state)); - assert_spin_locked(&conf->device_lock); + lockdep_assert_held(&conf->device_lock); list_del_init(&sh->lru); atomic_inc(&sh->count); @@ -1409,7 +1412,7 @@ void r5c_flush_cache(struct r5conf *conf, int num) int count; struct stripe_head *sh, *next; - assert_spin_locked(&conf->device_lock); + lockdep_assert_held(&conf->device_lock); if (!conf->log) return; @@ -1583,21 +1586,19 @@ void r5l_wake_reclaim(struct r5l_log *log, sector_t space) md_wakeup_thread(log->reclaim_thread); } -void r5l_quiesce(struct r5l_log *log, int state) +void r5l_quiesce(struct r5l_log *log, int quiesce) { struct mddev *mddev; - if (!log || state == 2) - return; - if (state == 0) - kthread_unpark(log->reclaim_thread->tsk); - else if (state == 1) { + + if (quiesce) { /* make sure r5l_write_super_and_discard_space exits */ mddev = log->rdev->mddev; wake_up(&mddev->sb_wait); kthread_park(log->reclaim_thread->tsk); r5l_wake_reclaim(log, MaxSector); r5l_do_reclaim(log); - } + } else + kthread_unpark(log->reclaim_thread->tsk); } bool r5l_log_disk_error(struct r5conf *conf) @@ -2442,7 +2443,6 @@ static void r5c_recovery_flush_data_only_stripes(struct r5l_log *log, raid5_release_stripe(sh); } - md_wakeup_thread(conf->mddev->thread); /* reuse conf->wait_for_quiescent in recovery */ wait_event(conf->wait_for_quiescent, atomic_read(&conf->active_stripes) == 0); @@ -2485,10 +2485,10 @@ static int r5l_recovery_log(struct r5l_log *log) ctx->seq += 10000; if ((ctx->data_only_stripes == 0) && (ctx->data_parity_stripes == 0)) - pr_debug("md/raid:%s: starting from clean shutdown\n", + pr_info("md/raid:%s: starting from clean shutdown\n", mdname(mddev)); else - pr_debug("md/raid:%s: recovering %d data-only stripes and %d data-parity stripes\n", + pr_info("md/raid:%s: recovering %d data-only stripes and %d data-parity stripes\n", mdname(mddev), ctx->data_only_stripes, ctx->data_parity_stripes); @@ -2571,31 +2571,22 @@ static ssize_t r5c_journal_mode_show(struct mddev *mddev, char *page) int r5c_journal_mode_set(struct mddev *mddev, int mode) { struct r5conf *conf; - int err; if (mode < R5C_JOURNAL_MODE_WRITE_THROUGH || mode > R5C_JOURNAL_MODE_WRITE_BACK) return -EINVAL; - err = mddev_lock(mddev); - if (err) - return err; conf = mddev->private; - if (!conf || !conf->log) { - mddev_unlock(mddev); + if (!conf || !conf->log) return -ENODEV; - } if (raid5_calc_degraded(conf) > 0 && - mode == R5C_JOURNAL_MODE_WRITE_BACK) { - mddev_unlock(mddev); + mode == R5C_JOURNAL_MODE_WRITE_BACK) return -EINVAL; - } mddev_suspend(mddev); conf->log->r5c_journal_mode = mode; mddev_resume(mddev); - mddev_unlock(mddev); pr_debug("md/raid:%s: setting r5c cache mode to %d: %s\n", mdname(mddev), mode, r5c_journal_mode_str[mode]); @@ -2608,6 +2599,7 @@ static ssize_t r5c_journal_mode_store(struct mddev *mddev, { int mode = ARRAY_SIZE(r5c_journal_mode_str); size_t len = length; + int ret; if (len < 2) return -EINVAL; @@ -2619,8 +2611,12 @@ static ssize_t r5c_journal_mode_store(struct mddev *mddev, if (strlen(r5c_journal_mode_str[mode]) == len && !strncmp(page, r5c_journal_mode_str[mode], len)) break; - - return r5c_journal_mode_set(mddev, mode) ?: length; + ret = mddev_lock(mddev); + if (ret) + return ret; + ret = r5c_journal_mode_set(mddev, mode); + mddev_unlock(mddev); + return ret ?: length; } struct md_sysfs_entry @@ -3034,6 +3030,23 @@ ioerr: return ret; } +int r5l_start(struct r5l_log *log) +{ + int ret; + + if (!log) + return 0; + + ret = r5l_load_log(log); + if (ret) { + struct mddev *mddev = log->rdev->mddev; + struct r5conf *conf = mddev->private; + + r5l_exit_log(conf); + } + return ret; +} + void r5c_update_on_rdev_error(struct mddev *mddev, struct md_rdev *rdev) { struct r5conf *conf = mddev->private; @@ -3136,13 +3149,9 @@ int r5l_init_log(struct r5conf *conf, struct md_rdev *rdev) rcu_assign_pointer(conf->log, log); - if (r5l_load_log(log)) - goto error; - set_bit(MD_HAS_JOURNAL, &conf->mddev->flags); return 0; -error: rcu_assign_pointer(conf->log, NULL); md_unregister_thread(&log->reclaim_thread); reclaim_thread: @@ -3165,6 +3174,8 @@ void r5l_exit_log(struct r5conf *conf) conf->log = NULL; synchronize_rcu(); + /* Ensure disable_writeback_work wakes up and exits */ + wake_up(&conf->mddev->sb_wait); flush_work(&log->disable_writeback_work); md_unregister_thread(&log->reclaim_thread); mempool_destroy(log->meta_pool); |