drbd_worker.c revision 5a75cc7cfbb98e896232902214432dae30653dfe
1b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* 2b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_worker.c 3b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 4b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner This file is part of DRBD by Philipp Reisner and Lars Ellenberg. 5b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 6b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. 7b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. 8b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. 9b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 10b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd is free software; you can redistribute it and/or modify 11b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner it under the terms of the GNU General Public License as published by 12b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner the Free Software Foundation; either version 2, or (at your option) 13b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner any later version. 14b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 15b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd is distributed in the hope that it will be useful, 16b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner but WITHOUT ANY WARRANTY; without even the implied warranty of 17b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner GNU General Public License for more details. 19b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 20b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner You should have received a copy of the GNU General Public License 21b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner along with drbd; see the file COPYING. If not, write to 22b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 23b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 24b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 25b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 26b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/module.h> 27b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/drbd.h> 28b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/sched.h> 29b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/smp_lock.h> 30b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/wait.h> 31b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/mm.h> 32b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/memcontrol.h> 33b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/mm_inline.h> 34b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/slab.h> 35b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/random.h> 36b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/string.h> 37b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include <linux/scatterlist.h> 38b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 39b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include "drbd_int.h" 40b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#include "drbd_req.h" 41b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 42b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int w_make_ov_request(struct drbd_conf *mdev, struct drbd_work *w, int cancel); 43b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 44b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 45b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 46b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* defined here: 47b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_md_io_complete 4845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_endio_sec 49b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_endio_pri 50b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 51b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * more endio handlers: 52b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner atodb_endio in drbd_actlog.c 53b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_bm_async_io_complete in drbd_bitmap.c 54b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 55b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * For all these callbacks, note the following: 56b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * The callbacks will be called in irq context by the IDE drivers, 57b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * and in Softirqs/Tasklets/BH context by the SCSI drivers. 58b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * Try to get the locking right :) 59b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * 60b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 61b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 62b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 63b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* About the global_state_lock 64b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner Each state transition on an device holds a read lock. In case we have 65b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner to evaluate the sync after dependencies, we grab a write lock, because 66b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner we need stable states on all devices for that. */ 67b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerrwlock_t global_state_lock; 68b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 69b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* used for synchronous meta data and bitmap IO 70b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * submitted by drbd_md_sync_page_io() 71b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 72b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnervoid drbd_md_io_complete(struct bio *bio, int error) 73b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 74b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_md_io *md_io; 75b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 76b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner md_io = (struct drbd_md_io *)bio->bi_private; 77b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner md_io->error = error; 78b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 79b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner complete(&md_io->event); 80b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 81b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 82b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* reads on behalf of the partner, 83b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * "submitted" by the receiver 84b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 8545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenbergvoid drbd_endio_read_sec_final(struct drbd_epoch_entry *e) __releases(local) 86b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 87b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner unsigned long flags = 0; 8845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct drbd_conf *mdev = e->mdev; 89b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 90b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(e->block_id != ID_VACANT); 91b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 92b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irqsave(&mdev->req_lock, flags); 93b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->read_cnt += e->size >> 9; 94b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_del(&e->w.list); 95b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (list_empty(&mdev->read_ee)) 96b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner wake_up(&mdev->ee_wait); 9745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (test_bit(__EE_WAS_ERROR, &e->flags)) 9845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg __drbd_chk_io_error(mdev, FALSE); 99b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irqrestore(&mdev->req_lock, flags); 100b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 101b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_queue_work(&mdev->data.work, &e->w); 102b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 103b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 104b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 10545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenbergstatic int is_failed_barrier(int ee_flags) 10645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg{ 10745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg return (ee_flags & (EE_IS_BARRIER|EE_WAS_ERROR|EE_RESUBMITTED)) 10845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg == (EE_IS_BARRIER|EE_WAS_ERROR); 10945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg} 11045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 111b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* writes on behalf of the partner, or resync writes, 11245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg * "submitted" by the receiver, final stage. */ 11345bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenbergstatic void drbd_endio_write_sec_final(struct drbd_epoch_entry *e) __releases(local) 114b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 115b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner unsigned long flags = 0; 11645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct drbd_conf *mdev = e->mdev; 117b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sector_t e_sector; 118b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int do_wake; 119b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int is_syncer_req; 120b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int do_al_complete_io; 121b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 12245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg /* if this is a failed barrier request, disable use of barriers, 12345bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg * and schedule for resubmission */ 12445bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (is_failed_barrier(e->flags)) { 125b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_bump_write_ordering(mdev, WO_bdev_flush); 126b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irqsave(&mdev->req_lock, flags); 127b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_del(&e->w.list); 128fc8ce1941d668c70e57a07f13f5a63e73e5dbff3Philipp Reisner e->flags = (e->flags & ~EE_WAS_ERROR) | EE_RESUBMITTED; 129b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner e->w.cb = w_e_reissue; 130b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* put_ldev actually happens below, once we come here again. */ 131b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner __release(local); 132b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irqrestore(&mdev->req_lock, flags); 133b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_queue_work(&mdev->data.work, &e->w); 134b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return; 135b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 136b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 137b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(e->block_id != ID_VACANT); 138b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 139b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* after we moved e to done_ee, 140b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * we may no longer access it, 141b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * it may be freed/reused already! 142b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * (as soon as we release the req_lock) */ 143b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner e_sector = e->sector; 144b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner do_al_complete_io = e->flags & EE_CALL_AL_COMPLETE_IO; 14545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg is_syncer_req = is_syncer_block_id(e->block_id); 146b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 14745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg spin_lock_irqsave(&mdev->req_lock, flags); 14845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg mdev->writ_cnt += e->size >> 9; 149b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_del(&e->w.list); /* has been on active_ee or sync_ee */ 150b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_add_tail(&e->w.list, &mdev->done_ee); 151b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 152b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* No hlist_del_init(&e->colision) here, we did not send the Ack yet, 153b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * neither did we wake possibly waiting conflicting requests. 154b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * done from "drbd_process_done_ee" within the appropriate w.cb 155b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * (e_end_block/e_end_resync_block) or from _drbd_clear_done_ee */ 156b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 157b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner do_wake = is_syncer_req 158b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ? list_empty(&mdev->sync_ee) 159b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner : list_empty(&mdev->active_ee); 160b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 16145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (test_bit(__EE_WAS_ERROR, &e->flags)) 162b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner __drbd_chk_io_error(mdev, FALSE); 163b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irqrestore(&mdev->req_lock, flags); 164b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 165b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (is_syncer_req) 166b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_rs_complete_io(mdev, e_sector); 167b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 168b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (do_wake) 169b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner wake_up(&mdev->ee_wait); 170b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 171b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (do_al_complete_io) 172b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_al_complete_io(mdev, e_sector); 173b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 174b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner wake_asender(mdev); 175b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 17645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg} 177b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 17845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg/* writes on behalf of the partner, or resync writes, 17945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg * "submitted" by the receiver. 18045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg */ 18145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenbergvoid drbd_endio_sec(struct bio *bio, int error) 18245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg{ 18345bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct drbd_epoch_entry *e = bio->bi_private; 18445bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct drbd_conf *mdev = e->mdev; 18545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg int uptodate = bio_flagged(bio, BIO_UPTODATE); 18645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg int is_write = bio_data_dir(bio) == WRITE; 18745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 18845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (error) 18945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg dev_warn(DEV, "%s: error=%d s=%llus\n", 19045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg is_write ? "write" : "read", error, 19145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg (unsigned long long)e->sector); 19245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (!error && !uptodate) { 19345bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg dev_warn(DEV, "%s: setting error to -EIO s=%llus\n", 19445bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg is_write ? "write" : "read", 19545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg (unsigned long long)e->sector); 19645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg /* strange behavior of some lower level drivers... 19745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg * fail the request by clearing the uptodate flag, 19845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg * but do not return any error?! */ 19945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg error = -EIO; 20045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg } 20145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 20245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (error) 20345bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg set_bit(__EE_WAS_ERROR, &e->flags); 20445bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 20545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg bio_put(bio); /* no need for the bio anymore */ 20645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (atomic_dec_and_test(&e->pending_bios)) { 20745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (is_write) 20845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_endio_write_sec_final(e); 20945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg else 21045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_endio_read_sec_final(e); 21145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg } 212b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 213b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 214b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* read, readA or write requests on R_PRIMARY coming from drbd_make_request 215b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 216b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnervoid drbd_endio_pri(struct bio *bio, int error) 217b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 218b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_request *req = bio->bi_private; 219b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_conf *mdev = req->mdev; 220b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner enum drbd_req_event what; 221b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int uptodate = bio_flagged(bio, BIO_UPTODATE); 222b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 223b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!error && !uptodate) { 224b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_warn(DEV, "p %s: setting error to -EIO\n", 225b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner bio_data_dir(bio) == WRITE ? "write" : "read"); 226b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* strange behavior of some lower level drivers... 227b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * fail the request by clearing the uptodate flag, 228b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * but do not return any error?! */ 229b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner error = -EIO; 230b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 231b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 232b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* to avoid recursion in __req_mod */ 233b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(error)) { 234b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner what = (bio_data_dir(bio) == WRITE) 235b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ? write_completed_with_error 2365c3c7e64bbcb60db39d0d55c8fab39ef41d41c30Lars Ellenberg : (bio_rw(bio) == READ) 237b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ? read_completed_with_error 238b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner : read_ahead_completed_with_error; 239b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else 240b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner what = completed_ok; 241b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 242b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner bio_put(req->private_bio); 243b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner req->private_bio = ERR_PTR(error); 244b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 2450f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg req_mod(req, what); 246b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 247b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 248b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_read_retry_remote(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 249b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 250b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_request *req = container_of(w, struct drbd_request, w); 251b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 252b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* We should not detach for read io-error, 253b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * but try to WRITE the P_DATA_REPLY to the failed location, 254b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * to give the disk the chance to relocate that block */ 255b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 256b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->req_lock); 257d255e5ff5fc6cc6c60dd014d1261448a7bbc8134Lars Ellenberg if (cancel || mdev->state.pdsk != D_UP_TO_DATE) { 258d255e5ff5fc6cc6c60dd014d1261448a7bbc8134Lars Ellenberg _req_mod(req, read_retry_remote_canceled); 259b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->req_lock); 260b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 261b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 262b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->req_lock); 263b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 264b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return w_send_read_req(mdev, w, 0); 265b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 266b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 267b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_resync_inactive(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 268b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 269b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ERR_IF(cancel) return 1; 270b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "resync inactive, but callback triggered??\n"); 271b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; /* Simply ignore this! */ 272b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 273b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 27445bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenbergvoid drbd_csum_ee(struct drbd_conf *mdev, struct crypto_hash *tfm, struct drbd_epoch_entry *e, void *digest) 27545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg{ 27645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct hash_desc desc; 27745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct scatterlist sg; 27845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct page *page = e->pages; 27945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg struct page *tmp; 28045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg unsigned len; 28145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 28245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg desc.tfm = tfm; 28345bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg desc.flags = 0; 28445bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 28545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg sg_init_table(&sg, 1); 28645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg crypto_hash_init(&desc); 28745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 28845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg while ((tmp = page_chain_next(page))) { 28945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg /* all but the last page will be fully used */ 29045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg sg_set_page(&sg, page, PAGE_SIZE, 0); 29145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg crypto_hash_update(&desc, &sg, sg.length); 29245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg page = tmp; 29345bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg } 29445bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg /* and now the last, possibly only partially used page */ 29545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg len = e->size & (PAGE_SIZE - 1); 29645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg sg_set_page(&sg, page, len ?: PAGE_SIZE, 0); 29745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg crypto_hash_update(&desc, &sg, sg.length); 29845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg crypto_hash_final(&desc, digest); 29945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg} 30045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg 30145bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenbergvoid drbd_csum_bio(struct drbd_conf *mdev, struct crypto_hash *tfm, struct bio *bio, void *digest) 302b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 303b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct hash_desc desc; 304b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct scatterlist sg; 305b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct bio_vec *bvec; 306b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int i; 307b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 308b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner desc.tfm = tfm; 309b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner desc.flags = 0; 310b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 311b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sg_init_table(&sg, 1); 312b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner crypto_hash_init(&desc); 313b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 314b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner __bio_for_each_segment(bvec, bio, i, 0) { 315b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sg_set_page(&sg, bvec->bv_page, bvec->bv_len, bvec->bv_offset); 316b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner crypto_hash_update(&desc, &sg, sg.length); 317b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 318b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner crypto_hash_final(&desc, digest); 319b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 320b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 321b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int w_e_send_csum(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 322b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 323b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_epoch_entry *e = container_of(w, struct drbd_epoch_entry, w); 324b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int digest_size; 325b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner void *digest; 326b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok; 327b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 328b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(e->block_id == DRBD_MAGIC + 0xbeef); 329b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 330b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) { 331b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 332b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 333b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 334b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 33545bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (likely((e->flags & EE_WAS_ERROR) == 0)) { 336b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest_size = crypto_hash_digestsize(mdev->csums_tfm); 337b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest = kmalloc(digest_size, GFP_NOIO); 338b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (digest) { 33945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_csum_ee(mdev, mdev->csums_tfm, e, digest); 340b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 341b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner inc_rs_pending(mdev); 342b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_drequest_csum(mdev, 343b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner e->sector, 344b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner e->size, 345b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest, 346b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest_size, 347b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner P_CSUM_RS_REQUEST); 348b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner kfree(digest); 349b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 350b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "kmalloc() of digest failed.\n"); 351b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = 0; 352b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 353b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else 354b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = 1; 355b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 356b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 357b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 358b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(!ok)) 359b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "drbd_send_drequest(..., csum) failed\n"); 360b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 361b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 362b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 363b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#define GFP_TRY (__GFP_HIGHMEM | __GFP_NOWARN) 364b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 365b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int read_for_csum(struct drbd_conf *mdev, sector_t sector, int size) 366b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 367b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_epoch_entry *e; 368b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 369b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!get_ldev(mdev)) 37080a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg return -EIO; 371b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 3720f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg if (drbd_rs_should_slow_down(mdev)) 3730f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg goto defer; 3740f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg 375b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* GFP_TRY, because if there is no memory available right now, this may 376b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * be rescheduled for later. It is "only" background resync, after all. */ 377b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner e = drbd_alloc_ee(mdev, DRBD_MAGIC+0xbeef, sector, size, GFP_TRY); 37845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (!e) 37980a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg goto defer; 380b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 38180a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg e->w.cb = w_e_send_csum; 382b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->req_lock); 383b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_add(&e->w.list, &mdev->read_ee); 384b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->req_lock); 385b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 3860f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg atomic_add(size >> 9, &mdev->rs_sect_ev); 38745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (drbd_submit_ee(mdev, e, READ, DRBD_FAULT_RS_RD) == 0) 38880a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg return 0; 389b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 39045bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_free_ee(mdev, e); 39180a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenbergdefer: 39245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg put_ldev(mdev); 39380a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg return -EAGAIN; 394b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 395b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 396b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnervoid resync_timer_fn(unsigned long data) 397b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 398b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_conf *mdev = (struct drbd_conf *) data; 399b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int queue; 400b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 40163106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner queue = 1; 40263106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner switch (mdev->state.conn) { 40363106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner case C_VERIFY_S: 40463106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner mdev->resync_work.cb = w_make_ov_request; 40563106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner break; 40663106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner case C_SYNC_TARGET: 40763106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner mdev->resync_work.cb = w_make_resync_request; 40863106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner break; 40963106d3c6c769b6219bd04edde513b12abae3f61Philipp Reisner default: 410b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner queue = 0; 411b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->resync_work.cb = w_resync_inactive; 412b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 413b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 414b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* harmless race: list_empty outside data.work.q_lock */ 415b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (list_empty(&mdev->resync_work.list) && queue) 416b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_queue_work(&mdev->data.work, &mdev->resync_work); 417b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 418b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 419778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisnerstatic void fifo_set(struct fifo_buffer *fb, int value) 420778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner{ 421778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int i; 422778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 423778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner for (i = 0; i < fb->size; i++) 424778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner fb->values[i] += value; 425778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner} 426778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 427778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisnerstatic int fifo_push(struct fifo_buffer *fb, int value) 428778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner{ 429778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int ov; 430778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 431778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner ov = fb->values[fb->head_index]; 432778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner fb->values[fb->head_index++] = value; 433778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 434778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner if (fb->head_index >= fb->size) 435778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner fb->head_index = 0; 436778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 437778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner return ov; 438778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner} 439778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 440778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisnerstatic void fifo_add_val(struct fifo_buffer *fb, int value) 441778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner{ 442778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int i; 443778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 444778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner for (i = 0; i < fb->size; i++) 445778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner fb->values[i] += value; 446778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner} 447778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 448778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisnerint drbd_rs_controller(struct drbd_conf *mdev) 449778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner{ 450778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner unsigned int sect_in; /* Number of sectors that came in since the last turn */ 451778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner unsigned int want; /* The number of sectors we want in the proxy */ 452778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int req_sect; /* Number of sectors to request in this turn */ 453778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int correction; /* Number of sectors more we need in the proxy*/ 454778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int cps; /* correction per invocation of drbd_rs_controller() */ 455778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int steps; /* Number of time steps to plan ahead */ 456778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int curr_corr; 457778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner int max_sect; 458778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 459778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner sect_in = atomic_xchg(&mdev->rs_sect_in, 0); /* Number of sectors that came in */ 460778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->rs_in_flight -= sect_in; 461778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 462778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner spin_lock(&mdev->peer_seq_lock); /* get an atomic view on mdev->rs_plan_s */ 463778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 464778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner steps = mdev->rs_plan_s.size; /* (mdev->sync_conf.c_plan_ahead * 10 * SLEEP_TIME) / HZ; */ 465778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 466778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner if (mdev->rs_in_flight + sect_in == 0) { /* At start of resync */ 467778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner want = ((mdev->sync_conf.rate * 2 * SLEEP_TIME) / HZ) * steps; 468778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner } else { /* normal path */ 469778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner want = mdev->sync_conf.c_fill_target ? mdev->sync_conf.c_fill_target : 470778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner sect_in * mdev->sync_conf.c_delay_target * HZ / (SLEEP_TIME * 10); 471778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner } 472778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 473778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner correction = want - mdev->rs_in_flight - mdev->rs_planed; 474778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 475778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner /* Plan ahead */ 476778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner cps = correction / steps; 477778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner fifo_add_val(&mdev->rs_plan_s, cps); 478778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->rs_planed += cps * steps; 479778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 480778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner /* What we do in this step */ 481778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner curr_corr = fifo_push(&mdev->rs_plan_s, 0); 482778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner spin_unlock(&mdev->peer_seq_lock); 483778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->rs_planed -= curr_corr; 484778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 485778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner req_sect = sect_in + curr_corr; 486778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner if (req_sect < 0) 487778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner req_sect = 0; 488778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 489778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner max_sect = (mdev->sync_conf.c_max_rate * 2 * SLEEP_TIME) / HZ; 490778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner if (req_sect > max_sect) 491778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner req_sect = max_sect; 492778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 493778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner /* 494778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner dev_warn(DEV, "si=%u if=%d wa=%u co=%d st=%d cps=%d pl=%d cc=%d rs=%d\n", 495778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner sect_in, mdev->rs_in_flight, want, correction, 496778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner steps, cps, mdev->rs_planed, curr_corr, req_sect); 497778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner */ 498778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 499778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner return req_sect; 500778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner} 501778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner 502b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_make_resync_request(struct drbd_conf *mdev, 503b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_work *w, int cancel) 504b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 505b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner unsigned long bit; 506b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sector_t sector; 507b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner const sector_t capacity = drbd_get_capacity(mdev->this_bdev); 508bb3d000cb99aa0924b78c1ae5f5943484527868aLars Ellenberg int max_segment_size; 5090f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg int number, rollback_i, size, pe, mx; 510b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int align, queued, sndbuf; 5110f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg int i = 0; 512b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 513b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) 514b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 515b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 516b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(mdev->state.conn < C_CONNECTED)) { 517b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Confused in w_make_resync_request()! cstate < Connected"); 518b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 519b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 520b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 521b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->state.conn != C_SYNC_TARGET) 522b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "%s in w_make_resync_request\n", 523b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_conn_str(mdev->state.conn)); 524b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 525b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!get_ldev(mdev)) { 526b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Since we only need to access mdev->rsync a 527b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner get_ldev_if_state(mdev,D_FAILED) would be sufficient, but 528b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner to continue resync with a broken disk makes no sense at 529b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner all */ 530b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Disk broke down during resync!\n"); 531b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->resync_work.cb = w_resync_inactive; 532b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 533b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 534b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 535bb3d000cb99aa0924b78c1ae5f5943484527868aLars Ellenberg /* starting with drbd 8.3.8, we can handle multi-bio EEs, 536bb3d000cb99aa0924b78c1ae5f5943484527868aLars Ellenberg * if it should be necessary */ 5375a75cc7cfbb98e896232902214432dae30653dfePhilipp Reisner max_segment_size = 5385a75cc7cfbb98e896232902214432dae30653dfePhilipp Reisner mdev->agreed_pro_version < 94 ? queue_max_segment_size(mdev->rq_queue) : 5395a75cc7cfbb98e896232902214432dae30653dfePhilipp Reisner mdev->agreed_pro_version < 95 ? DRBD_MAX_SIZE_H80_PACKET : DRBD_MAX_SEGMENT_SIZE; 540bb3d000cb99aa0924b78c1ae5f5943484527868aLars Ellenberg 541778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner if (mdev->rs_plan_s.size) { /* mdev->sync_conf.c_plan_ahead */ 542778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner number = drbd_rs_controller(mdev) >> (BM_BLOCK_SHIFT - 9); 543778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->c_sync_rate = number * HZ * (BM_BLOCK_SIZE / 1024) / SLEEP_TIME; 544778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner } else { 545778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->c_sync_rate = mdev->sync_conf.rate; 546778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner number = SLEEP_TIME * mdev->c_sync_rate / ((BM_BLOCK_SIZE / 1024) * HZ); 547778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner } 5480f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg 5490f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg /* Throttle resync on lower level disk activity, which may also be 5500f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg * caused by application IO on Primary/SyncTarget. 5510f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg * Keep this after the call to drbd_rs_controller, as that assumes 5520f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg * to be called as precisely as possible every SLEEP_TIME, 5530f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg * and would be confused otherwise. */ 5540f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg if (drbd_rs_should_slow_down(mdev)) 5550f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg goto requeue; 556b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 557b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_lock(&mdev->data.mutex); 558b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->data.socket) 559b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mx = mdev->data.socket->sk->sk_rcvbuf / sizeof(struct p_block_req); 560b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner else 561b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mx = 1; 562b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_unlock(&mdev->data.mutex); 563b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 564b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* For resync rates >160MB/sec, allow more pending RS requests */ 565b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (number > mx) 566b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mx = number; 567b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 568b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Limit the number of pending RS requests to no more than the peer's receive buffer */ 5690f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg pe = atomic_read(&mdev->rs_pending_cnt); 570b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if ((pe + number) > mx) { 571b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner number = mx - pe; 572b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 573b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 574b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner for (i = 0; i < number; i++) { 575b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Stop generating RS requests, when half of the send buffer is filled */ 576b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_lock(&mdev->data.mutex); 577b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->data.socket) { 578b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner queued = mdev->data.socket->sk->sk_wmem_queued; 579b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sndbuf = mdev->data.socket->sk->sk_sndbuf; 580b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 581b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner queued = 1; 582b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sndbuf = 0; 583b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 584b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_unlock(&mdev->data.mutex); 585b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (queued > sndbuf / 2) 586b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto requeue; 587b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 588b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnernext_sector: 589b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner size = BM_BLOCK_SIZE; 590b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner bit = drbd_bm_find_next(mdev, mdev->bm_resync_fo); 591b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 592b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (bit == -1UL) { 593b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->bm_resync_fo = drbd_bm_bits(mdev); 594b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->resync_work.cb = w_resync_inactive; 595b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 596b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 597b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 598b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 599b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sector = BM_BIT_TO_SECT(bit); 600b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 601b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (drbd_try_rs_begin_io(mdev, sector)) { 602b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->bm_resync_fo = bit; 603b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto requeue; 604b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 605b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->bm_resync_fo = bit + 1; 606b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 607b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(drbd_bm_test_bit(mdev, bit) == 0)) { 608b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_rs_complete_io(mdev, sector); 609b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto next_sector; 610b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 611b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 612b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#if DRBD_MAX_SEGMENT_SIZE > BM_BLOCK_SIZE 613b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* try to find some adjacent bits. 614b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * we stop if we have already the maximum req size. 615b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * 616b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * Additionally always align bigger requests, in order to 617b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * be prepared for all stripe sizes of software RAIDs. 618b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 619b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner align = 1; 620d207450cf2731c6a2afa8c78fb31c7206cd35ebaPhilipp Reisner rollback_i = i; 621b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner for (;;) { 622b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (size + BM_BLOCK_SIZE > max_segment_size) 623b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner break; 624b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 625b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Be always aligned */ 626b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (sector & ((1<<(align+3))-1)) 627b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner break; 628b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 629b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* do not cross extent boundaries */ 630b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (((bit+1) & BM_BLOCKS_PER_BM_EXT_MASK) == 0) 631b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner break; 632b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* now, is it actually dirty, after all? 633b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * caution, drbd_bm_test_bit is tri-state for some 634b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * obscure reason; ( b == 0 ) would get the out-of-band 635b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * only accidentally right because of the "oddly sized" 636b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * adjustment below */ 637b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (drbd_bm_test_bit(mdev, bit+1) != 1) 638b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner break; 639b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner bit++; 640b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner size += BM_BLOCK_SIZE; 641b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if ((BM_BLOCK_SIZE << align) <= size) 642b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner align++; 643b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner i++; 644b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 645b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* if we merged some, 646b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * reset the offset to start the next drbd_bm_find_next from */ 647b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (size > BM_BLOCK_SIZE) 648b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->bm_resync_fo = bit + 1; 649b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner#endif 650b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 651b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* adjust very last sectors, in case we are oddly sized */ 652b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (sector + (size>>9) > capacity) 653b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner size = (capacity-sector)<<9; 654b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->agreed_pro_version >= 89 && mdev->csums_tfm) { 655b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner switch (read_for_csum(mdev, sector, size)) { 65680a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg case -EIO: /* Disk failure */ 657b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 658b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 65980a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg case -EAGAIN: /* allocation failed, or ldev busy */ 660b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_rs_complete_io(mdev, sector); 661b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->bm_resync_fo = BM_SECT_TO_BIT(sector); 662d207450cf2731c6a2afa8c78fb31c7206cd35ebaPhilipp Reisner i = rollback_i; 663b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto requeue; 66480a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg case 0: 66580a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg /* everything ok */ 66680a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg break; 66780a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg default: 66880a40e439e5a3f30b0a6210a1add6d7c33392e54Lars Ellenberg BUG(); 669b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 670b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 671b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner inc_rs_pending(mdev); 672b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!drbd_send_drequest(mdev, P_RS_DATA_REQUEST, 673b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sector, size, ID_SYNCER)) { 674b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "drbd_send_drequest() failed, aborting...\n"); 675b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_rs_pending(mdev); 676b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 677b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 678b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 679b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 680b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 681b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 682b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->bm_resync_fo >= drbd_bm_bits(mdev)) { 683b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* last syncer _request_ was sent, 684b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * but the P_RS_DATA_REPLY not yet received. sync will end (and 685b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * next sync group will resume), as soon as we receive the last 686b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * resync data block, and the last bit is cleared. 687b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * until then resync "work" is "inactive" ... 688b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 689b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->resync_work.cb = w_resync_inactive; 690b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 691b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 692b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 693b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 694b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner requeue: 695778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->rs_in_flight += (i << (BM_BLOCK_SHIFT - 9)); 696b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mod_timer(&mdev->resync_timer, jiffies + SLEEP_TIME); 697b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 698b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 699b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 700b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 701b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int w_make_ov_request(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 702b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 703b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int number, i, size; 704b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sector_t sector; 705b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner const sector_t capacity = drbd_get_capacity(mdev->this_bdev); 706b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 707b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) 708b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 709b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 710b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(mdev->state.conn < C_CONNECTED)) { 711b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Confused in w_make_ov_request()! cstate < Connected"); 712b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 713b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 714b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 715b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner number = SLEEP_TIME*mdev->sync_conf.rate / ((BM_BLOCK_SIZE/1024)*HZ); 716b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (atomic_read(&mdev->rs_pending_cnt) > number) 717b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto requeue; 718b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 719b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner number -= atomic_read(&mdev->rs_pending_cnt); 720b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 721b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sector = mdev->ov_position; 722b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner for (i = 0; i < number; i++) { 723b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (sector >= capacity) { 724b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->resync_work.cb = w_resync_inactive; 725b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 726b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 727b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 728b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner size = BM_BLOCK_SIZE; 729b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 730b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (drbd_try_rs_begin_io(mdev, sector)) { 731b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->ov_position = sector; 732b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto requeue; 733b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 734b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 735b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (sector + (size>>9) > capacity) 736b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner size = (capacity-sector)<<9; 737b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 738b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner inc_rs_pending(mdev); 739b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!drbd_send_ov_request(mdev, sector, size)) { 740b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_rs_pending(mdev); 741b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 742b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 743b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sector += BM_SECT_PER_BIT; 744b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 745b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->ov_position = sector; 746b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 747b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner requeue: 748b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mod_timer(&mdev->resync_timer, jiffies + SLEEP_TIME); 749b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 750b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 751b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 752b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 753b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_ov_finished(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 754b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 755b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner kfree(w); 756b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ov_oos_print(mdev); 757b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_resync_finished(mdev); 758b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 759b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 760b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 761b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 762b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int w_resync_finished(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 763b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 764b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner kfree(w); 765b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 766b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_resync_finished(mdev); 767b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 768b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 769b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 770b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 771b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint drbd_resync_finished(struct drbd_conf *mdev) 772b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 773b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner unsigned long db, dt, dbdt; 774b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner unsigned long n_oos; 775b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner union drbd_state os, ns; 776b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_work *w; 777b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner char *khelper_cmd = NULL; 778b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 779b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Remove all elements from the resync LRU. Since future actions 780b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * might set bits in the (main) bitmap, then the entries in the 781b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * resync LRU would be wrong. */ 782b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (drbd_rs_del_all(mdev)) { 783b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* In case this is not possible now, most probably because 784b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * there are P_RS_DATA_REPLY Packets lingering on the worker's 785b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * queue (or even the read operations for those packets 786b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * is not finished by now). Retry in 100ms. */ 787b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 788b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_kick_lo(mdev); 789b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner __set_current_state(TASK_INTERRUPTIBLE); 790b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner schedule_timeout(HZ / 10); 791b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner w = kmalloc(sizeof(struct drbd_work), GFP_ATOMIC); 792b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (w) { 793b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner w->cb = w_resync_finished; 794b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_queue_work(&mdev->data.work, w); 795b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 796b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 797b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Warn failed to drbd_rs_del_all() and to kmalloc(w).\n"); 798b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 799b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 800b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dt = (jiffies - mdev->rs_start - mdev->rs_paused) / HZ; 801b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (dt <= 0) 802b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dt = 1; 803b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner db = mdev->rs_total; 804b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dbdt = Bit2KB(db/dt); 805b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->rs_paused /= HZ; 806b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 807b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!get_ldev(mdev)) 808b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto out; 809b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 810b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->req_lock); 811b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner os = mdev->state; 812b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 813b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* This protects us against multiple calls (that can happen in the presence 814b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner of application IO), and against connectivity loss just before we arrive here. */ 815b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (os.conn <= C_CONNECTED) 816b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto out_unlock; 817b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 818b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns = os; 819b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.conn = C_CONNECTED; 820b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 821b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_info(DEV, "%s done (total %lu sec; paused %lu sec; %lu K/sec)\n", 822b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) ? 823b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner "Online verify " : "Resync", 824b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dt + mdev->rs_paused, mdev->rs_paused, dbdt); 825b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 826b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner n_oos = drbd_bm_total_weight(mdev); 827b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 828b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) { 829b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (n_oos) { 830b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_alert(DEV, "Online verify found %lu %dk block out of sync!\n", 831b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner n_oos, Bit2KB(1)); 832b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner khelper_cmd = "out-of-sync"; 833b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 834b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 835b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT((n_oos - mdev->rs_failed) == 0); 836b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 837b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T) 838b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner khelper_cmd = "after-resync-target"; 839b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 840b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->csums_tfm && mdev->rs_total) { 841b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner const unsigned long s = mdev->rs_same_csum; 842b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner const unsigned long t = mdev->rs_total; 843b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner const int ratio = 844b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (t == 0) ? 0 : 845b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (t < 100000) ? ((s*100)/t) : (s/(t/100)); 846b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_info(DEV, "%u %% had equal check sums, eliminated: %luK; " 847b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner "transferred %luK total %luK\n", 848b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ratio, 849b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner Bit2KB(mdev->rs_same_csum), 850b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner Bit2KB(mdev->rs_total - mdev->rs_same_csum), 851b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner Bit2KB(mdev->rs_total)); 852b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 853b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 854b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 855b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->rs_failed) { 856b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_info(DEV, " %lu failed blocks\n", mdev->rs_failed); 857b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 858b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T) { 859b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.disk = D_INCONSISTENT; 860b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.pdsk = D_UP_TO_DATE; 861b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 862b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.disk = D_UP_TO_DATE; 863b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.pdsk = D_INCONSISTENT; 864b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 865b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 866b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.disk = D_UP_TO_DATE; 867b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.pdsk = D_UP_TO_DATE; 868b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 869b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T) { 870b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->p_uuid) { 871b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int i; 872b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner for (i = UI_BITMAP ; i <= UI_HISTORY_END ; i++) 873b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner _drbd_uuid_set(mdev, i, mdev->p_uuid[i]); 874b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_uuid_set(mdev, UI_BITMAP, mdev->ldev->md.uuid[UI_CURRENT]); 875b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner _drbd_uuid_set(mdev, UI_CURRENT, mdev->p_uuid[UI_CURRENT]); 876b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 877b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "mdev->p_uuid is NULL! BUG\n"); 878b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 879b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 880b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 881b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_uuid_set_bm(mdev, 0UL); 882b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 883b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->p_uuid) { 884b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Now the two UUID sets are equal, update what we 885b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * know of the peer. */ 886b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int i; 887b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner for (i = UI_CURRENT ; i <= UI_HISTORY_END ; i++) 888b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->p_uuid[i] = mdev->ldev->md.uuid[i]; 889b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 890b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 891b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 892b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); 893b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerout_unlock: 894b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->req_lock); 895b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 896b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerout: 897b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->rs_total = 0; 898b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->rs_failed = 0; 899b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->rs_paused = 0; 900b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->ov_start_sector = 0; 901b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 902b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (test_and_clear_bit(WRITE_BM_AFTER_RESYNC, &mdev->flags)) { 903b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_warn(DEV, "Writing the whole bitmap, due to failed kmalloc\n"); 904b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_queue_bitmap_io(mdev, &drbd_bm_write, NULL, "write from resync_finished"); 905b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 906b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 907b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (khelper_cmd) 908b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_khelper(mdev, khelper_cmd); 909b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 910b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 911b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 912b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 913b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/* helper */ 914b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic void move_to_net_ee_or_free(struct drbd_conf *mdev, struct drbd_epoch_entry *e) 915b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 91645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (drbd_ee_has_active_page(e)) { 917b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* This might happen if sendpage() has not finished */ 918435f07402b3165b90592073bc0f8c6f8fa160ff9Lars Ellenberg int i = DIV_ROUND_UP(e->size, PAGE_SIZE); 919435f07402b3165b90592073bc0f8c6f8fa160ff9Lars Ellenberg atomic_add(i, &mdev->pp_in_use_by_net); 920435f07402b3165b90592073bc0f8c6f8fa160ff9Lars Ellenberg atomic_sub(i, &mdev->pp_in_use); 921b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->req_lock); 922b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_add_tail(&e->w.list, &mdev->net_ee); 923b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->req_lock); 924435f07402b3165b90592073bc0f8c6f8fa160ff9Lars Ellenberg wake_up(&drbd_pp_wait); 925b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else 926b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 927b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 928b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 929b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/** 930b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * w_e_end_data_req() - Worker callback, to send a P_DATA_REPLY packet in response to a P_DATA_REQUEST 931b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @mdev: DRBD device. 932b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @w: work object. 933b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @cancel: The connection will be closed anyways 934b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 935b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_e_end_data_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 936b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 937b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_epoch_entry *e = container_of(w, struct drbd_epoch_entry, w); 938b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok; 939b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 940b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) { 941b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 942b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 943b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 944b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 945b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 94645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (likely((e->flags & EE_WAS_ERROR) == 0)) { 947b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_block(mdev, P_DATA_REPLY, e); 948b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 949b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (__ratelimit(&drbd_ratelimit_state)) 950b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Sending NegDReply. sector=%llus.\n", 951b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (unsigned long long)e->sector); 952b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 953b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_ack(mdev, P_NEG_DREPLY, e); 954b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 955b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 956b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 957b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 958b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner move_to_net_ee_or_free(mdev, e); 959b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 960b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(!ok)) 961b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "drbd_send_block() failed\n"); 962b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 963b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 964b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 965b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/** 966b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * w_e_end_rsdata_req() - Worker callback to send a P_RS_DATA_REPLY packet in response to a P_RS_DATA_REQUESTRS 967b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @mdev: DRBD device. 968b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @w: work object. 969b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @cancel: The connection will be closed anyways 970b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 971b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_e_end_rsdata_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 972b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 973b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_epoch_entry *e = container_of(w, struct drbd_epoch_entry, w); 974b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok; 975b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 976b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) { 977b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 978b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 979b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 980b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 981b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 982b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (get_ldev_if_state(mdev, D_FAILED)) { 983b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_rs_complete_io(mdev, e->sector); 984b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 985b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 986b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 98745bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (likely((e->flags & EE_WAS_ERROR) == 0)) { 988b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (likely(mdev->state.pdsk >= D_INCONSISTENT)) { 989b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner inc_rs_pending(mdev); 990b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_block(mdev, P_RS_DATA_REPLY, e); 991b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 992b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (__ratelimit(&drbd_ratelimit_state)) 993b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Not sending RSDataReply, " 994b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner "partner DISKLESS!\n"); 995b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = 1; 996b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 997b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 998b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (__ratelimit(&drbd_ratelimit_state)) 999b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Sending NegRSDReply. sector %llus.\n", 1000b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (unsigned long long)e->sector); 1001b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1002b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_ack(mdev, P_NEG_RS_DREPLY, e); 1003b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1004b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* update resync data with failure */ 1005b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_rs_failed_io(mdev, e->sector, e->size); 1006b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1007b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1008b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 1009b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1010b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner move_to_net_ee_or_free(mdev, e); 1011b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1012b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(!ok)) 1013b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "drbd_send_block() failed\n"); 1014b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 1015b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1016b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1017b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_e_end_csum_rs_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1018b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1019b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_epoch_entry *e = container_of(w, struct drbd_epoch_entry, w); 1020b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct digest_info *di; 1021b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int digest_size; 1022b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner void *digest = NULL; 1023b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok, eq = 0; 1024b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1025b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) { 1026b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 1027b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 1028b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1029b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1030b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 10311d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg if (get_ldev(mdev)) { 10321d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg drbd_rs_complete_io(mdev, e->sector); 10331d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg put_ldev(mdev); 10341d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg } 1035b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 103685719573dd716bc2ac3e098b44adfed884250babPhilipp Reisner di = e->digest; 1037b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 103845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (likely((e->flags & EE_WAS_ERROR) == 0)) { 1039b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* quick hack to try to avoid a race against reconfiguration. 1040b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * a real fix would be much more involved, 1041b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * introducing more locking mechanisms */ 1042b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->csums_tfm) { 1043b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest_size = crypto_hash_digestsize(mdev->csums_tfm); 1044b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(digest_size == di->digest_size); 1045b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest = kmalloc(digest_size, GFP_NOIO); 1046b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1047b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (digest) { 104845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_csum_ee(mdev, mdev->csums_tfm, e, digest); 1049b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner eq = !memcmp(digest, di->digest, digest_size); 1050b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner kfree(digest); 1051b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1052b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1053b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (eq) { 1054b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_set_in_sync(mdev, e->sector, e->size); 1055676396d545350a70d922605ec23c2ed26124334aLars Ellenberg /* rs_same_csums unit is BM_BLOCK_SIZE */ 1056676396d545350a70d922605ec23c2ed26124334aLars Ellenberg mdev->rs_same_csum += e->size >> BM_BLOCK_SHIFT; 1057b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_ack(mdev, P_RS_IS_IN_SYNC, e); 1058b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 1059b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner inc_rs_pending(mdev); 1060204bba9965c4cc175bf5bc65ddd19889e9085c72Philipp Reisner e->block_id = ID_SYNCER; /* By setting block_id, digest pointer becomes invalid! */ 1061204bba9965c4cc175bf5bc65ddd19889e9085c72Philipp Reisner e->flags &= ~EE_HAS_DIGEST; /* This e no longer has a digest pointer */ 1062204bba9965c4cc175bf5bc65ddd19889e9085c72Philipp Reisner kfree(di); 1063b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_block(mdev, P_RS_DATA_REPLY, e); 1064b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1065b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 1066b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_ack(mdev, P_NEG_RS_DREPLY, e); 1067b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (__ratelimit(&drbd_ratelimit_state)) 1068b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Sending NegDReply. I guess it gets messy.\n"); 1069b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1070b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1071b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 1072b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner move_to_net_ee_or_free(mdev, e); 1073b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1074b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(!ok)) 1075b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "drbd_send_block/ack() failed\n"); 1076b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 1077b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1078b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1079b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_e_end_ov_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1080b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1081b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_epoch_entry *e = container_of(w, struct drbd_epoch_entry, w); 1082b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int digest_size; 1083b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner void *digest; 1084b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok = 1; 1085b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1086b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) 1087b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto out; 1088b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 108945bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (unlikely((e->flags & EE_WAS_ERROR) != 0)) 1090b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner goto out; 1091b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1092b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest_size = crypto_hash_digestsize(mdev->verify_tfm); 1093b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* FIXME if this allocation fails, online verify will not terminate! */ 1094b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest = kmalloc(digest_size, GFP_NOIO); 1095b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (digest) { 109645bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_csum_ee(mdev, mdev->verify_tfm, e, digest); 1097b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner inc_rs_pending(mdev); 1098b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_drequest_csum(mdev, e->sector, e->size, 1099b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest, digest_size, P_OV_REPLY); 1100b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!ok) 1101b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_rs_pending(mdev); 1102b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner kfree(digest); 1103b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1104b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1105b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerout: 1106b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 1107b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1108b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 1109b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1110b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 1111b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1112b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1113b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnervoid drbd_ov_oos_found(struct drbd_conf *mdev, sector_t sector, int size) 1114b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1115b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->ov_last_oos_start + mdev->ov_last_oos_size == sector) { 1116b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->ov_last_oos_size += size>>9; 1117b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 1118b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->ov_last_oos_start = sector; 1119b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->ov_last_oos_size = size>>9; 1120b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1121b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_set_out_of_sync(mdev, sector, size); 1122b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner set_bit(WRITE_BM_AFTER_RESYNC, &mdev->flags); 1123b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1124b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1125b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_e_end_ov_reply(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1126b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1127b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_epoch_entry *e = container_of(w, struct drbd_epoch_entry, w); 1128b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct digest_info *di; 1129b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int digest_size; 1130b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner void *digest; 1131b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok, eq = 0; 1132b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1133b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) { 1134b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 1135b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 1136b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1137b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1138b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1139b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* after "cancel", because after drbd_disconnect/drbd_rs_cancel_all 1140b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * the resync lru has been cleaned up already */ 11411d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg if (get_ldev(mdev)) { 11421d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg drbd_rs_complete_io(mdev, e->sector); 11431d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg put_ldev(mdev); 11441d53f09e170e477de67babd7a10e277479260d51Lars Ellenberg } 1145b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 114685719573dd716bc2ac3e098b44adfed884250babPhilipp Reisner di = e->digest; 1147b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 114845bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg if (likely((e->flags & EE_WAS_ERROR) == 0)) { 1149b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest_size = crypto_hash_digestsize(mdev->verify_tfm); 1150b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner digest = kmalloc(digest_size, GFP_NOIO); 1151b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (digest) { 115245bb912bd5ea4d2b3a270a93cbdf767a0e2df6f5Lars Ellenberg drbd_csum_ee(mdev, mdev->verify_tfm, e, digest); 1153b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1154b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(digest_size == di->digest_size); 1155b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner eq = !memcmp(digest, di->digest, digest_size); 1156b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner kfree(digest); 1157b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1158b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else { 1159b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_ack(mdev, P_NEG_RS_DREPLY, e); 1160b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (__ratelimit(&drbd_ratelimit_state)) 1161b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Sending NegDReply. I guess it gets messy.\n"); 1162b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1163b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1164b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dec_unacked(mdev); 1165b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!eq) 1166b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_ov_oos_found(mdev, e->sector, e->size); 1167b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner else 1168b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ov_oos_print(mdev); 1169b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1170b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_ack_ex(mdev, P_OV_RESULT, e->sector, e->size, 1171b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner eq ? ID_IN_SYNC : ID_OUT_OF_SYNC); 1172b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1173b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_free_ee(mdev, e); 1174b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1175b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (--mdev->ov_left == 0) { 1176b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ov_oos_print(mdev); 1177b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_resync_finished(mdev); 1178b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1179b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1180b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 1181b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1182b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1183b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_prev_work_done(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1184b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1185b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_wq_barrier *b = container_of(w, struct drbd_wq_barrier, w); 1186b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner complete(&b->done); 1187b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1188b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1189b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1190b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_send_barrier(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1191b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1192b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_tl_epoch *b = container_of(w, struct drbd_tl_epoch, w); 1193b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct p_barrier *p = &mdev->data.sbuf.barrier; 1194b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok = 1; 1195b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1196b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* really avoid racing with tl_clear. w.cb may have been referenced 1197b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * just before it was reassigned and re-queued, so double check that. 1198b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * actually, this race was harmless, since we only try to send the 1199b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * barrier packet here, and otherwise do nothing with the object. 1200b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * but compare with the head of w_clear_epoch */ 1201b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->req_lock); 1202b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (w->cb != w_send_barrier || mdev->state.conn < C_CONNECTED) 1203b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner cancel = 1; 1204b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->req_lock); 1205b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (cancel) 1206b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1207b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1208b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!drbd_get_data_sock(mdev)) 1209b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 1210b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner p->barrier = b->br_number; 1211b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* inc_ap_pending was done where this was queued. 1212b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * dec_ap_pending will be done in got_BarrierAck 1213b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * or (on connection loss) in w_clear_epoch. */ 1214b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = _drbd_send_cmd(mdev, mdev->data.socket, P_BARRIER, 12150b70a13dac014ec9274640b9e945bde493ba365ePhilipp Reisner (struct p_header80 *)p, sizeof(*p), 0); 1216b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_put_data_sock(mdev); 1217b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1218b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 1219b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1220b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1221b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_send_write_hint(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1222b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1223b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (cancel) 1224b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1225b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return drbd_send_short_cmd(mdev, P_UNPLUG_REMOTE); 1226b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1227b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1228b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/** 1229b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * w_send_dblock() - Worker callback to send a P_DATA packet in order to mirror a write request 1230b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @mdev: DRBD device. 1231b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @w: work object. 1232b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @cancel: The connection will be closed anyways 1233b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 1234b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_send_dblock(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1235b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1236b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_request *req = container_of(w, struct drbd_request, w); 1237b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok; 1238b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1239b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) { 1240b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner req_mod(req, send_canceled); 1241b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1242b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1243b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1244b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_dblock(mdev, req); 1245b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner req_mod(req, ok ? handed_over_to_network : send_failed); 1246b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1247b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 1248b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1249b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1250b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/** 1251b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * w_send_read_req() - Worker callback to send a read request (P_DATA_REQUEST) packet 1252b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @mdev: DRBD device. 1253b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @w: work object. 1254b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @cancel: The connection will be closed anyways 1255b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 1256b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint w_send_read_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1257b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1258b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_request *req = container_of(w, struct drbd_request, w); 1259b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int ok; 1260b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1261b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (unlikely(cancel)) { 1262b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner req_mod(req, send_canceled); 1263b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1264b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1265b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1266b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ok = drbd_send_drequest(mdev, P_DATA_REQUEST, req->sector, req->size, 1267b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (unsigned long)req); 1268b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1269b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!ok) { 1270b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* ?? we set C_TIMEOUT or C_BROKEN_PIPE in drbd_send(); 1271b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * so this is probably redundant */ 1272b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->state.conn >= C_CONNECTED) 1273b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_force_state(mdev, NS(conn, C_NETWORK_FAILURE)); 1274b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1275b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner req_mod(req, ok ? handed_over_to_network : send_failed); 1276b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1277b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ok; 1278b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1279b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1280265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisnerint w_restart_disk_io(struct drbd_conf *mdev, struct drbd_work *w, int cancel) 1281265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner{ 1282265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner struct drbd_request *req = container_of(w, struct drbd_request, w); 1283265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner 12840778286a133d2d3f81861a4e5db308e359583006Philipp Reisner if (bio_data_dir(req->master_bio) == WRITE && req->rq_state & RQ_IN_ACT_LOG) 1285265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner drbd_al_begin_io(mdev, req->sector); 1286265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner /* Calling drbd_al_begin_io() out of the worker might deadlocks 1287265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner theoretically. Practically it can not deadlock, since this is 1288265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner only used when unfreezing IOs. All the extents of the requests 1289265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner that made it into the TL are already active */ 1290265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner 1291265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner drbd_req_make_private_bio(req, req->master_bio); 1292265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner req->private_bio->bi_bdev = mdev->ldev->backing_bdev; 1293265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner generic_make_request(req->private_bio); 1294265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner 1295265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner return 1; 1296265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner} 1297265be2d09853d425ad14a61cda0ca63345613d0cPhilipp Reisner 1298b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int _drbd_may_sync_now(struct drbd_conf *mdev) 1299b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1300b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_conf *odev = mdev; 1301b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1302b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner while (1) { 1303b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (odev->sync_conf.after == -1) 1304b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 1; 1305b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev = minor_to_mdev(odev->sync_conf.after); 1306b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ERR_IF(!odev) return 1; 1307b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if ((odev->state.conn >= C_SYNC_SOURCE && 1308b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev->state.conn <= C_PAUSED_SYNC_T) || 1309b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev->state.aftr_isp || odev->state.peer_isp || 1310b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev->state.user_isp) 1311b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 1312b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1313b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1314b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1315b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/** 1316b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * _drbd_pause_after() - Pause resync on all devices that may not resync now 1317b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @mdev: DRBD device. 1318b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * 1319b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * Called from process context only (admin command and after_state_ch). 1320b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 1321b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int _drbd_pause_after(struct drbd_conf *mdev) 1322b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1323b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_conf *odev; 1324b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int i, rv = 0; 1325b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1326b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner for (i = 0; i < minor_count; i++) { 1327b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev = minor_to_mdev(i); 1328b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!odev) 1329b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner continue; 1330b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (odev->state.conn == C_STANDALONE && odev->state.disk == D_DISKLESS) 1331b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner continue; 1332b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!_drbd_may_sync_now(odev)) 1333b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner rv |= (__drbd_set_state(_NS(odev, aftr_isp, 1), CS_HARD, NULL) 1334b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner != SS_NOTHING_TO_DO); 1335b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1336b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1337b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return rv; 1338b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1339b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1340b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/** 1341b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * _drbd_resume_next() - Resume resync on all devices that may resync now 1342b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @mdev: DRBD device. 1343b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * 1344b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * Called from process context only (admin command and worker). 1345b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 1346b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int _drbd_resume_next(struct drbd_conf *mdev) 1347b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1348b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_conf *odev; 1349b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int i, rv = 0; 1350b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1351b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner for (i = 0; i < minor_count; i++) { 1352b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev = minor_to_mdev(i); 1353b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!odev) 1354b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner continue; 1355b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (odev->state.conn == C_STANDALONE && odev->state.disk == D_DISKLESS) 1356b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner continue; 1357b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (odev->state.aftr_isp) { 1358b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (_drbd_may_sync_now(odev)) 1359b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner rv |= (__drbd_set_state(_NS(odev, aftr_isp, 0), 1360b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner CS_HARD, NULL) 1361b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner != SS_NOTHING_TO_DO) ; 1362b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1363b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1364b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return rv; 1365b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1366b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1367b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnervoid resume_next_sg(struct drbd_conf *mdev) 1368b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1369b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_lock_irq(&global_state_lock); 1370b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner _drbd_resume_next(mdev); 1371b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_unlock_irq(&global_state_lock); 1372b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1373b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1374b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnervoid suspend_other_sg(struct drbd_conf *mdev) 1375b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1376b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_lock_irq(&global_state_lock); 1377b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner _drbd_pause_after(mdev); 1378b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_unlock_irq(&global_state_lock); 1379b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1380b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1381b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerstatic int sync_after_error(struct drbd_conf *mdev, int o_minor) 1382b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1383b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_conf *odev; 1384b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1385b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (o_minor == -1) 1386b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return NO_ERROR; 1387b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (o_minor < -1 || minor_to_mdev(o_minor) == NULL) 1388b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ERR_SYNC_AFTER; 1389b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1390b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* check for loops */ 1391b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev = minor_to_mdev(o_minor); 1392b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner while (1) { 1393b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (odev == mdev) 1394b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return ERR_SYNC_AFTER_CYCLE; 1395b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1396b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* dependency chain ends here, no cycles. */ 1397b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (odev->sync_conf.after == -1) 1398b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return NO_ERROR; 1399b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1400b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* follow the dependency chain */ 1401b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner odev = minor_to_mdev(odev->sync_conf.after); 1402b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1403b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1404b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1405b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint drbd_alter_sa(struct drbd_conf *mdev, int na) 1406b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1407b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int changes; 1408b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int retcode; 1409b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1410b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_lock_irq(&global_state_lock); 1411b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner retcode = sync_after_error(mdev, na); 1412b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (retcode == NO_ERROR) { 1413b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->sync_conf.after = na; 1414b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner do { 1415b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner changes = _drbd_pause_after(mdev); 1416b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner changes |= _drbd_resume_next(mdev); 1417b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } while (changes); 1418b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1419b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_unlock_irq(&global_state_lock); 1420b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return retcode; 1421b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1422b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1423309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisnerstatic void ping_peer(struct drbd_conf *mdev) 1424309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner{ 1425309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner clear_bit(GOT_PING_ACK, &mdev->flags); 1426309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner request_ping(mdev); 1427309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner wait_event(mdev->misc_wait, 1428309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner test_bit(GOT_PING_ACK, &mdev->flags) || mdev->state.conn < C_CONNECTED); 1429309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner} 1430309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner 1431b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner/** 1432b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * drbd_start_resync() - Start the resync process 1433b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @mdev: DRBD device. 1434b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * @side: Either C_SYNC_SOURCE or C_SYNC_TARGET 1435b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * 1436b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * This function might bring you directly into one of the 1437b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * C_PAUSED_SYNC_* states. 1438b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 1439b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnervoid drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side) 1440b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1441b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner union drbd_state ns; 1442b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int r; 1443b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1444b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->state.conn >= C_SYNC_SOURCE) { 1445b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_err(DEV, "Resync already running!\n"); 1446b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return; 1447b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1448b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1449b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* In case a previous resync run was aborted by an IO error/detach on the peer. */ 1450b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_rs_cancel_all(mdev); 1451b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1452b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (side == C_SYNC_TARGET) { 1453b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Since application IO was locked out during C_WF_BITMAP_T and 1454b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner C_WF_SYNC_UUID we are still unmodified. Before going to C_SYNC_TARGET 1455b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner we check that we might make the data inconsistent. */ 1456b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner r = drbd_khelper(mdev, "before-resync-target"); 1457b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner r = (r >> 8) & 0xff; 1458b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (r > 0) { 1459b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_info(DEV, "before-resync-target handler returned %d, " 1460b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner "dropping connection.\n", r); 1461b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_force_state(mdev, NS(conn, C_DISCONNECTING)); 1462b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return; 1463b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1464b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1465b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1466b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_state_lock(mdev); 1467b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1468b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!get_ldev_if_state(mdev, D_NEGOTIATING)) { 1469b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_state_unlock(mdev); 1470b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return; 1471b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1472b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1473b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (side == C_SYNC_TARGET) { 1474b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->bm_resync_fo = 0; 1475b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } else /* side == C_SYNC_SOURCE */ { 1476b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner u64 uuid; 1477b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1478b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner get_random_bytes(&uuid, sizeof(u64)); 1479b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_uuid_set(mdev, UI_BITMAP, uuid); 1480b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_send_sync_uuid(mdev, uuid); 1481b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1482b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(mdev->state.disk == D_UP_TO_DATE); 1483b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1484b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1485b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_lock_irq(&global_state_lock); 1486b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns = mdev->state; 1487b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1488b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.aftr_isp = !_drbd_may_sync_now(mdev); 1489b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1490b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.conn = side; 1491b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1492b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (side == C_SYNC_TARGET) 1493b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.disk = D_INCONSISTENT; 1494b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner else /* side == C_SYNC_SOURCE */ 1495b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns.pdsk = D_INCONSISTENT; 1496b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1497b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner r = __drbd_set_state(mdev, ns, CS_VERBOSE, NULL); 1498b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ns = mdev->state; 1499b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1500b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (ns.conn < C_CONNECTED) 1501b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner r = SS_UNKNOWN_ERROR; 1502b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1503b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (r == SS_SUCCESS) { 15041d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg unsigned long tw = drbd_bm_total_weight(mdev); 15051d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg unsigned long now = jiffies; 15061d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg int i; 15071d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg 1508b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->rs_failed = 0; 1509b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->rs_paused = 0; 1510b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mdev->rs_same_csum = 0; 15110f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg mdev->rs_last_events = 0; 15120f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg mdev->rs_last_sect_ev = 0; 15131d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg mdev->rs_total = tw; 15141d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg mdev->rs_start = now; 15151d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg for (i = 0; i < DRBD_SYNC_MARKS; i++) { 15161d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg mdev->rs_mark_left[i] = tw; 15171d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg mdev->rs_mark_time[i] = now; 15181d7734a0df02ff5068ff8baa1447c7baee601db1Lars Ellenberg } 1519b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner _drbd_pause_after(mdev); 1520b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1521b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner write_unlock_irq(&global_state_lock); 1522b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner put_ldev(mdev); 1523b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1524b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (r == SS_SUCCESS) { 1525b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_info(DEV, "Began resync as %s (will sync %lu KB [%lu bits set]).\n", 1526b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_conn_str(ns.conn), 1527b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (unsigned long) mdev->rs_total << (BM_BLOCK_SHIFT-10), 1528b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner (unsigned long) mdev->rs_total); 1529b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1530b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->rs_total == 0) { 1531b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* Peer still reachable? Beware of failing before-resync-target handlers! */ 1532309d1608cce32903d67d47e7545e232c400b6aa0Philipp Reisner ping_peer(mdev); 1533b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_resync_finished(mdev); 1534b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1535b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1536778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner atomic_set(&mdev->rs_sect_in, 0); 15370f0601f4ea2f53cfd8bcae060fb03d9bbde070ecLars Ellenberg atomic_set(&mdev->rs_sect_ev, 0); 1538778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->rs_in_flight = 0; 1539778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner mdev->rs_planed = 0; 1540778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner spin_lock(&mdev->peer_seq_lock); 1541778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner fifo_set(&mdev->rs_plan_s, 0); 1542778f271dfe7a7173c0bae2d6cde8d9bd1533e668Philipp Reisner spin_unlock(&mdev->peer_seq_lock); 1543b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* ns.conn may already be != mdev->state.conn, 1544b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * we may have been paused in between, or become paused until 1545b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * the timer triggers. 1546b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * No matter, that is handled in resync_timer_fn() */ 1547b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (ns.conn == C_SYNC_TARGET) 1548b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mod_timer(&mdev->resync_timer, jiffies); 1549b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1550b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_md_sync(mdev); 1551b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1552d0c3f60f3611ceac9b1e4fdffd1497337568e7cbPhilipp Reisner drbd_state_unlock(mdev); 1553b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1554b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1555b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisnerint drbd_worker(struct drbd_thread *thi) 1556b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner{ 1557b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_conf *mdev = thi->mdev; 1558b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner struct drbd_work *w = NULL; 1559b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner LIST_HEAD(work_list); 1560b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner int intr = 0, i; 1561b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1562b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sprintf(current->comm, "drbd%d_worker", mdev_to_minor(mdev)); 1563b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1564b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner while (get_t_state(thi) == Running) { 1565b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_thread_current_set_cpu(mdev); 1566b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1567b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (down_trylock(&mdev->data.work.s)) { 1568b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_lock(&mdev->data.mutex); 1569b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->data.socket && !mdev->net_conf->no_cork) 1570b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_tcp_uncork(mdev->data.socket); 1571b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_unlock(&mdev->data.mutex); 1572b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1573b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner intr = down_interruptible(&mdev->data.work.s); 1574b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1575b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_lock(&mdev->data.mutex); 1576b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->data.socket && !mdev->net_conf->no_cork) 1577b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_tcp_cork(mdev->data.socket); 1578b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner mutex_unlock(&mdev->data.mutex); 1579b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1580b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1581b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (intr) { 1582b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(intr == -EINTR); 1583b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner flush_signals(current); 1584b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ERR_IF (get_t_state(thi) == Running) 1585b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner continue; 1586b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner break; 1587b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1588b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1589b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (get_t_state(thi) != Running) 1590b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner break; 1591b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* With this break, we have done a down() but not consumed 1592b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner the entry from the list. The cleanup code takes care of 1593b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner this... */ 1594b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1595b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner w = NULL; 1596b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->data.work.q_lock); 1597b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner ERR_IF(list_empty(&mdev->data.work.q)) { 1598b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* something terribly wrong in our logic. 1599b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * we were able to down() the semaphore, 1600b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * but the list is empty... doh. 1601b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * 1602b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * what is the best thing to do now? 1603b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * try again from scratch, restarting the receiver, 1604b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * asender, whatnot? could break even more ugly, 1605b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * e.g. when we are primary, but no good local data. 1606b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * 1607b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * I'll try to get away just starting over this loop. 1608b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 1609b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->data.work.q_lock); 1610b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner continue; 1611b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1612b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner w = list_entry(mdev->data.work.q.next, struct drbd_work, list); 1613b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_del_init(&w->list); 1614b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->data.work.q_lock); 1615b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1616b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (!w->cb(mdev, w, mdev->state.conn < C_CONNECTED)) { 1617b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* dev_warn(DEV, "worker: a callback failed! \n"); */ 1618b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner if (mdev->state.conn >= C_CONNECTED) 1619b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_force_state(mdev, 1620b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner NS(conn, C_NETWORK_FAILURE)); 1621b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1622b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1623b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(test_bit(DEVICE_DYING, &mdev->flags)); 1624b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(test_bit(CONFIG_PENDING, &mdev->flags)); 1625b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1626b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->data.work.q_lock); 1627b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner i = 0; 1628b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner while (!list_empty(&mdev->data.work.q)) { 1629b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_splice_init(&mdev->data.work.q, &work_list); 1630b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->data.work.q_lock); 1631b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1632b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner while (!list_empty(&work_list)) { 1633b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner w = list_entry(work_list.next, struct drbd_work, list); 1634b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner list_del_init(&w->list); 1635b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner w->cb(mdev, w, 1); 1636b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner i++; /* dead debugging code */ 1637b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1638b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1639b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_lock_irq(&mdev->data.work.q_lock); 1640b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner } 1641b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner sema_init(&mdev->data.work.s, 0); 1642b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* DANGEROUS race: if someone did queue his work within the spinlock, 1643b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * but up() ed outside the spinlock, we could get an up() on the 1644b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * semaphore without corresponding list entry. 1645b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * So don't do that. 1646b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner */ 1647b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner spin_unlock_irq(&mdev->data.work.q_lock); 1648b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1649b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner D_ASSERT(mdev->state.disk == D_DISKLESS && mdev->state.conn == C_STANDALONE); 1650b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner /* _drbd_set_state only uses stop_nowait. 1651b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner * wait here for the Exiting receiver. */ 1652b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_thread_stop(&mdev->receiver); 1653b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner drbd_mdev_cleanup(mdev); 1654b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1655b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner dev_info(DEV, "worker terminated\n"); 1656b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1657b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner clear_bit(DEVICE_DYING, &mdev->flags); 1658b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner clear_bit(CONFIG_PENDING, &mdev->flags); 1659b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner wake_up(&mdev->state_wait); 1660b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner 1661b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner return 0; 1662b411b3637fa71fce9cf2acf0639009500f5892fePhilipp Reisner} 1663