From ac0acb9e39ac41575cc6a344d04295436fd4eb4e Mon Sep 17 00:00:00 2001 From: Lars Ellenberg Date: Tue, 11 Feb 2014 09:47:58 +0100 Subject: [PATCH] drbd: use drbd_device_post_work() in more places This replaces the md_sync_work member of struct drbd_device by a new MD_SYNC "work bit" in device->flags. This replaces the resync_start_work member of struct drbd_device by a new RS_START "work bit" in device->flags. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- drivers/block/drbd/drbd_int.h | 16 ++-------------- drivers/block/drbd/drbd_main.c | 25 +------------------------ drivers/block/drbd/drbd_worker.c | 27 +++++++++++++++++---------- 3 files changed, 20 insertions(+), 48 deletions(-) diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 5768260..3c701b0 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -457,6 +457,8 @@ enum { /* to be used in drbd_device_post_work() */ GO_DISKLESS, /* tell worker to schedule cleanup before detach */ DESTROY_DISK, /* tell worker to close backing devices and destroy related structures. */ + MD_SYNC, /* tell worker to call drbd_md_sync() */ + RS_START, /* tell worker to start resync/OV */ RS_PROGRESS, /* tell worker that resync made significant progress */ RS_DONE, /* tell worker that resync is done */ }; @@ -709,18 +711,10 @@ struct drbd_device { unsigned long last_reattach_jif; struct drbd_work resync_work; struct drbd_work unplug_work; - struct drbd_work md_sync_work; - struct drbd_work start_resync_work; struct timer_list resync_timer; struct timer_list md_sync_timer; struct timer_list start_resync_timer; struct timer_list request_timer; -#ifdef DRBD_DEBUG_MD_SYNC - struct { - unsigned int line; - const char* func; - } last_md_mark_dirty; -#endif /* Used after attach while negotiating new disk state. */ union drbd_state new_state_tmp; @@ -977,13 +971,7 @@ extern void __drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must extern void drbd_md_set_flag(struct drbd_device *device, int flags) __must_hold(local); extern void drbd_md_clear_flag(struct drbd_device *device, int flags)__must_hold(local); extern int drbd_md_test_flag(struct drbd_backing_dev *, int); -#ifndef DRBD_DEBUG_MD_SYNC extern void drbd_md_mark_dirty(struct drbd_device *device); -#else -#define drbd_md_mark_dirty(m) drbd_md_mark_dirty_(m, __LINE__ , __func__ ) -extern void drbd_md_mark_dirty_(struct drbd_device *device, - unsigned int line, const char *func); -#endif extern void drbd_queue_bitmap_io(struct drbd_device *device, int (*io_fn)(struct drbd_device *), void (*done)(struct drbd_device *, int), diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 0cf6094..ed35d52 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -60,7 +60,6 @@ static DEFINE_MUTEX(drbd_main_mutex); static int drbd_open(struct block_device *bdev, fmode_t mode); static void drbd_release(struct gendisk *gd, fmode_t mode); -static int w_md_sync(struct drbd_work *w, int unused); static void md_sync_timer_fn(unsigned long data); static int w_bitmap_io(struct drbd_work *w, int unused); @@ -1928,15 +1927,11 @@ void drbd_init_set_defaults(struct drbd_device *device) INIT_LIST_HEAD(&device->resync_reads); INIT_LIST_HEAD(&device->resync_work.list); INIT_LIST_HEAD(&device->unplug_work.list); - INIT_LIST_HEAD(&device->md_sync_work.list); - INIT_LIST_HEAD(&device->start_resync_work.list); INIT_LIST_HEAD(&device->bm_io_work.w.list); device->resync_work.cb = w_resync_timer; device->unplug_work.cb = w_send_write_hint; - device->md_sync_work.cb = w_md_sync; device->bm_io_work.w.cb = w_bitmap_io; - device->start_resync_work.cb = w_start_resync; init_timer(&device->resync_timer); init_timer(&device->md_sync_timer); @@ -3623,25 +3618,7 @@ int drbd_md_test_flag(struct drbd_backing_dev *bdev, int flag) static void md_sync_timer_fn(unsigned long data) { struct drbd_device *device = (struct drbd_device *) data; - - /* must not double-queue! */ - if (list_empty(&device->md_sync_work.list)) - drbd_queue_work_front(&first_peer_device(device)->connection->sender_work, - &device->md_sync_work); -} - -static int w_md_sync(struct drbd_work *w, int unused) -{ - struct drbd_device *device = - container_of(w, struct drbd_device, md_sync_work); - - drbd_warn(device, "md_sync_timer expired! Worker calls drbd_md_sync().\n"); -#ifdef DEBUG - drbd_warn(device, "last md_mark_dirty: %s:%u\n", - device->last_md_mark_dirty.func, device->last_md_mark_dirty.line); -#endif - drbd_md_sync(device); - return 0; + drbd_device_post_work(device, MD_SYNC); } const char *cmdname(enum drbd_packet cmd) diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c index 00bf490..a4310fd 100644 --- a/drivers/block/drbd/drbd_worker.c +++ b/drivers/block/drbd/drbd_worker.c @@ -1606,26 +1606,20 @@ void drbd_rs_controller_reset(struct drbd_device *device) void start_resync_timer_fn(unsigned long data) { struct drbd_device *device = (struct drbd_device *) data; - - drbd_queue_work(&first_peer_device(device)->connection->sender_work, - &device->start_resync_work); + drbd_device_post_work(device, RS_START); } -int w_start_resync(struct drbd_work *w, int cancel) +static void do_start_resync(struct drbd_device *device) { - struct drbd_device *device = - container_of(w, struct drbd_device, start_resync_work); - if (atomic_read(&device->unacked_cnt) || atomic_read(&device->rs_pending_cnt)) { - drbd_warn(device, "w_start_resync later...\n"); + drbd_warn(device, "postponing start_resync ...\n"); device->start_resync_timer.expires = jiffies + HZ/10; add_timer(&device->start_resync_timer); - return 0; + return; } drbd_start_resync(device, C_SYNC_SOURCE); clear_bit(AHEAD_TO_SYNC_SOURCE, &device->flags); - return 0; } /** @@ -1882,9 +1876,18 @@ static void go_diskless(struct drbd_device *device) drbd_force_state(device, NS(disk, D_DISKLESS)); } +static int do_md_sync(struct drbd_device *device) +{ + drbd_warn(device, "md_sync_timer expired! Worker calls drbd_md_sync().\n"); + drbd_md_sync(device); + return 0; +} + #define WORK_PENDING(work_bit, todo) (todo & (1UL << work_bit)) static void do_device_work(struct drbd_device *device, const unsigned long todo) { + if (WORK_PENDING(MD_SYNC, todo)) + do_md_sync(device); if (WORK_PENDING(RS_DONE, todo) || WORK_PENDING(RS_PROGRESS, todo)) update_on_disk_bitmap(device, WORK_PENDING(RS_DONE, todo)); @@ -1892,11 +1895,15 @@ static void do_device_work(struct drbd_device *device, const unsigned long todo) go_diskless(device); if (WORK_PENDING(DESTROY_DISK, todo)) drbd_ldev_destroy(device); + if (WORK_PENDING(RS_START, todo)) + do_start_resync(device); } #define DRBD_DEVICE_WORK_MASK \ ((1UL << GO_DISKLESS) \ |(1UL << DESTROY_DISK) \ + |(1UL << MD_SYNC) \ + |(1UL << RS_START) \ |(1UL << RS_PROGRESS) \ |(1UL << RS_DONE) \ ) -- 2.7.4