Thomas Gleixner | c6ae4c0 | 2019-05-22 09:51:37 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2 | /* |
| 3 | drbd_worker.c |
| 4 | |
| 5 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. |
| 6 | |
| 7 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. |
| 8 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. |
| 9 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. |
| 10 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 11 | |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 12 | */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 13 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 15 | #include <linux/drbd.h> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame] | 16 | #include <linux/sched/signal.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 17 | #include <linux/wait.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/memcontrol.h> |
| 20 | #include <linux/mm_inline.h> |
| 21 | #include <linux/slab.h> |
| 22 | #include <linux/random.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 23 | #include <linux/string.h> |
| 24 | #include <linux/scatterlist.h> |
Christoph Hellwig | c6a564ff | 2020-03-25 16:48:42 +0100 | [diff] [blame] | 25 | #include <linux/part_stat.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 26 | |
| 27 | #include "drbd_int.h" |
Andreas Gruenbacher | a3603a6 | 2011-05-30 11:47:37 +0200 | [diff] [blame] | 28 | #include "drbd_protocol.h" |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 29 | #include "drbd_req.h" |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 30 | |
Andreas Gruenbacher | d448a2e | 2011-08-25 16:59:58 +0200 | [diff] [blame] | 31 | static int make_ov_request(struct drbd_device *, int); |
| 32 | static int make_resync_request(struct drbd_device *, int); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 33 | |
Andreas Gruenbacher | c5a9161 | 2011-01-25 17:33:38 +0100 | [diff] [blame] | 34 | /* endio handlers: |
Andreas Gruenbacher | ed15b79 | 2014-09-11 14:29:06 +0200 | [diff] [blame] | 35 | * drbd_md_endio (defined here) |
Andreas Gruenbacher | fcefa62 | 2011-02-17 16:46:59 +0100 | [diff] [blame] | 36 | * drbd_request_endio (defined here) |
| 37 | * drbd_peer_request_endio (defined here) |
Andreas Gruenbacher | ed15b79 | 2014-09-11 14:29:06 +0200 | [diff] [blame] | 38 | * drbd_bm_endio (defined in drbd_bitmap.c) |
Andreas Gruenbacher | c5a9161 | 2011-01-25 17:33:38 +0100 | [diff] [blame] | 39 | * |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 40 | * For all these callbacks, note the following: |
| 41 | * The callbacks will be called in irq context by the IDE drivers, |
| 42 | * and in Softirqs/Tasklets/BH context by the SCSI drivers. |
| 43 | * Try to get the locking right :) |
| 44 | * |
| 45 | */ |
| 46 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 47 | /* used for synchronous meta data and bitmap IO |
| 48 | * submitted by drbd_md_sync_page_io() |
| 49 | */ |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 50 | void drbd_md_endio(struct bio *bio) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 51 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 52 | struct drbd_device *device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 53 | |
Lars Ellenberg | e37d243 | 2014-04-01 23:53:30 +0200 | [diff] [blame] | 54 | device = bio->bi_private; |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 55 | device->md_io.error = blk_status_to_errno(bio->bi_status); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 56 | |
Lars Ellenberg | 7c752ed | 2017-08-29 10:20:39 +0200 | [diff] [blame] | 57 | /* special case: drbd_md_read() during drbd_adm_attach() */ |
| 58 | if (device->ldev) |
| 59 | put_ldev(device); |
| 60 | bio_put(bio); |
| 61 | |
Philipp Reisner | 0cfac5d | 2011-11-10 12:12:52 +0100 | [diff] [blame] | 62 | /* We grabbed an extra reference in _drbd_md_sync_page_io() to be able |
| 63 | * to timeout on the lower level device, and eventually detach from it. |
| 64 | * If this io completion runs after that timeout expired, this |
| 65 | * drbd_md_put_buffer() may allow us to finally try and re-attach. |
| 66 | * During normal operation, this only puts that extra reference |
| 67 | * down to 1 again. |
| 68 | * Make sure we first drop the reference, and only then signal |
| 69 | * completion, or we may (in drbd_al_read_log()) cycle so fast into the |
| 70 | * next drbd_md_sync_page_io(), that we trigger the |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 71 | * ASSERT(atomic_read(&device->md_io_in_use) == 1) there. |
Philipp Reisner | 0cfac5d | 2011-11-10 12:12:52 +0100 | [diff] [blame] | 72 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 73 | drbd_md_put_buffer(device); |
Lars Ellenberg | e37d243 | 2014-04-01 23:53:30 +0200 | [diff] [blame] | 74 | device->md_io.done = 1; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 75 | wake_up(&device->misc_wait); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | /* reads on behalf of the partner, |
| 79 | * "submitted" by the receiver |
| 80 | */ |
Rashika Kheria | a186e47 | 2013-12-19 15:06:10 +0530 | [diff] [blame] | 81 | static void drbd_endio_read_sec_final(struct drbd_peer_request *peer_req) __releases(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 82 | { |
| 83 | unsigned long flags = 0; |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 84 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 85 | struct drbd_device *device = peer_device->device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 86 | |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 87 | spin_lock_irqsave(&device->resource->req_lock, flags); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 88 | device->read_cnt += peer_req->i.size >> 9; |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 89 | list_del(&peer_req->w.list); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 90 | if (list_empty(&device->read_ee)) |
| 91 | wake_up(&device->ee_wait); |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 92 | if (test_bit(__EE_WAS_ERROR, &peer_req->flags)) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 93 | __drbd_chk_io_error(device, DRBD_READ_ERROR); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 94 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 95 | |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 96 | drbd_queue_work(&peer_device->connection->sender_work, &peer_req->w); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 97 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 98 | } |
| 99 | |
| 100 | /* writes on behalf of the partner, or resync writes, |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 101 | * "submitted" by the receiver, final stage. */ |
Lars Ellenberg | a0fb3c4 | 2014-04-28 18:43:23 +0200 | [diff] [blame] | 102 | void drbd_endio_write_sec_final(struct drbd_peer_request *peer_req) __releases(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 103 | { |
| 104 | unsigned long flags = 0; |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 105 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 106 | struct drbd_device *device = peer_device->device; |
Philipp Reisner | 668700b | 2015-03-16 16:08:29 +0100 | [diff] [blame] | 107 | struct drbd_connection *connection = peer_device->connection; |
Lars Ellenberg | 181286a | 2011-03-31 15:18:56 +0200 | [diff] [blame] | 108 | struct drbd_interval i; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 109 | int do_wake; |
Andreas Gruenbacher | 579b57e | 2011-01-13 18:40:57 +0100 | [diff] [blame] | 110 | u64 block_id; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 111 | int do_al_complete_io; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 112 | |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 113 | /* after we moved peer_req to done_ee, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 114 | * we may no longer access it, |
| 115 | * it may be freed/reused already! |
| 116 | * (as soon as we release the req_lock) */ |
Lars Ellenberg | 181286a | 2011-03-31 15:18:56 +0200 | [diff] [blame] | 117 | i = peer_req->i; |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 118 | do_al_complete_io = peer_req->flags & EE_CALL_AL_COMPLETE_IO; |
| 119 | block_id = peer_req->block_id; |
Lars Ellenberg | 21ae5d7 | 2014-05-05 23:42:24 +0200 | [diff] [blame] | 120 | peer_req->flags &= ~EE_CALL_AL_COMPLETE_IO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 121 | |
Lars Ellenberg | e1fbc4c | 2017-08-29 10:20:35 +0200 | [diff] [blame] | 122 | if (peer_req->flags & EE_WAS_ERROR) { |
| 123 | /* In protocol != C, we usually do not send write acks. |
| 124 | * In case of a write error, send the neg ack anyways. */ |
| 125 | if (!__test_and_set_bit(__EE_SEND_WRITE_ACK, &peer_req->flags)) |
| 126 | inc_unacked(device); |
| 127 | drbd_set_out_of_sync(device, peer_req->i.sector, peer_req->i.size); |
| 128 | } |
| 129 | |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 130 | spin_lock_irqsave(&device->resource->req_lock, flags); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 131 | device->writ_cnt += peer_req->i.size >> 9; |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 132 | list_move_tail(&peer_req->w.list, &device->done_ee); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 133 | |
Andreas Gruenbacher | bb3bfe9 | 2011-01-21 15:59:23 +0100 | [diff] [blame] | 134 | /* |
Andreas Gruenbacher | 5e47226 | 2011-01-27 14:42:51 +0100 | [diff] [blame] | 135 | * Do not remove from the write_requests tree here: we did not send the |
Andreas Gruenbacher | bb3bfe9 | 2011-01-21 15:59:23 +0100 | [diff] [blame] | 136 | * Ack yet and did not wake possibly waiting conflicting requests. |
| 137 | * Removed from the tree from "drbd_process_done_ee" within the |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 138 | * appropriate dw.cb (e_end_block/e_end_resync_block) or from |
Andreas Gruenbacher | bb3bfe9 | 2011-01-21 15:59:23 +0100 | [diff] [blame] | 139 | * _drbd_clear_done_ee. |
| 140 | */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 141 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 142 | do_wake = list_empty(block_id == ID_SYNCER ? &device->sync_ee : &device->active_ee); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 143 | |
Bart Van Assche | 9305455 | 2018-10-03 13:56:25 -0700 | [diff] [blame] | 144 | /* FIXME do we want to detach for failed REQ_OP_DISCARD? |
Lars Ellenberg | f31e583 | 2018-12-20 17:23:42 +0100 | [diff] [blame] | 145 | * ((peer_req->flags & (EE_WAS_ERROR|EE_TRIM)) == EE_WAS_ERROR) */ |
Lars Ellenberg | a0fb3c4 | 2014-04-28 18:43:23 +0200 | [diff] [blame] | 146 | if (peer_req->flags & EE_WAS_ERROR) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 147 | __drbd_chk_io_error(device, DRBD_WRITE_ERROR); |
Philipp Reisner | 668700b | 2015-03-16 16:08:29 +0100 | [diff] [blame] | 148 | |
| 149 | if (connection->cstate >= C_WF_REPORT_PARAMS) { |
| 150 | kref_get(&device->kref); /* put is in drbd_send_acks_wf() */ |
| 151 | if (!queue_work(connection->ack_sender, &peer_device->send_acks_work)) |
| 152 | kref_put(&device->kref, drbd_destroy_device); |
| 153 | } |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 154 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 155 | |
Andreas Gruenbacher | 579b57e | 2011-01-13 18:40:57 +0100 | [diff] [blame] | 156 | if (block_id == ID_SYNCER) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 157 | drbd_rs_complete_io(device, i.sector); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 158 | |
| 159 | if (do_wake) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 160 | wake_up(&device->ee_wait); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 161 | |
| 162 | if (do_al_complete_io) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 163 | drbd_al_complete_io(device, &i); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 164 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 165 | put_ldev(device); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 166 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 167 | |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 168 | /* writes on behalf of the partner, or resync writes, |
| 169 | * "submitted" by the receiver. |
| 170 | */ |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 171 | void drbd_peer_request_endio(struct bio *bio) |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 172 | { |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 173 | struct drbd_peer_request *peer_req = bio->bi_private; |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 174 | struct drbd_device *device = peer_req->peer_device->device; |
Fabian Frederick | 7e5fec3 | 2016-06-14 00:26:35 +0200 | [diff] [blame] | 175 | bool is_write = bio_data_dir(bio) == WRITE; |
Christoph Hellwig | 45c2179 | 2017-04-05 19:21:22 +0200 | [diff] [blame] | 176 | bool is_discard = bio_op(bio) == REQ_OP_WRITE_ZEROES || |
| 177 | bio_op(bio) == REQ_OP_DISCARD; |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 178 | |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 179 | if (bio->bi_status && __ratelimit(&drbd_ratelimit_state)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 180 | drbd_warn(device, "%s: error=%d s=%llus\n", |
Lars Ellenberg | a0fb3c4 | 2014-04-28 18:43:23 +0200 | [diff] [blame] | 181 | is_write ? (is_discard ? "discard" : "write") |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 182 | : "read", bio->bi_status, |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 183 | (unsigned long long)peer_req->i.sector); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 184 | |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 185 | if (bio->bi_status) |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 186 | set_bit(__EE_WAS_ERROR, &peer_req->flags); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 187 | |
| 188 | bio_put(bio); /* no need for the bio anymore */ |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 189 | if (atomic_dec_and_test(&peer_req->pending_bios)) { |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 190 | if (is_write) |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 191 | drbd_endio_write_sec_final(peer_req); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 192 | else |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 193 | drbd_endio_read_sec_final(peer_req); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 194 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 195 | } |
| 196 | |
Baoyou Xie | 1ffa7bf | 2017-08-29 10:20:36 +0200 | [diff] [blame] | 197 | static void |
| 198 | drbd_panic_after_delayed_completion_of_aborted_request(struct drbd_device *device) |
Lars Ellenberg | 142207f | 2015-02-19 13:48:59 +0100 | [diff] [blame] | 199 | { |
| 200 | panic("drbd%u %s/%u potential random memory corruption caused by delayed completion of aborted local request\n", |
| 201 | device->minor, device->resource->name, device->vnr); |
| 202 | } |
| 203 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 204 | /* read, readA or write requests on R_PRIMARY coming from drbd_make_request |
| 205 | */ |
Christoph Hellwig | 4246a0b | 2015-07-20 15:29:37 +0200 | [diff] [blame] | 206 | void drbd_request_endio(struct bio *bio) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 207 | { |
Lars Ellenberg | a115413 | 2010-11-13 20:42:29 +0100 | [diff] [blame] | 208 | unsigned long flags; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 209 | struct drbd_request *req = bio->bi_private; |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 210 | struct drbd_device *device = req->device; |
Lars Ellenberg | a115413 | 2010-11-13 20:42:29 +0100 | [diff] [blame] | 211 | struct bio_and_error m; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 212 | enum drbd_req_event what; |
Philipp Reisner | 1b6dd25 | 2012-09-04 15:16:20 +0200 | [diff] [blame] | 213 | |
| 214 | /* If this request was aborted locally before, |
| 215 | * but now was completed "successfully", |
| 216 | * chances are that this caused arbitrary data corruption. |
| 217 | * |
| 218 | * "aborting" requests, or force-detaching the disk, is intended for |
| 219 | * completely blocked/hung local backing devices which do no longer |
| 220 | * complete requests at all, not even do error completions. In this |
| 221 | * situation, usually a hard-reset and failover is the only way out. |
| 222 | * |
| 223 | * By "aborting", basically faking a local error-completion, |
| 224 | * we allow for a more graceful swichover by cleanly migrating services. |
| 225 | * Still the affected node has to be rebooted "soon". |
| 226 | * |
| 227 | * By completing these requests, we allow the upper layers to re-use |
| 228 | * the associated data pages. |
| 229 | * |
| 230 | * If later the local backing device "recovers", and now DMAs some data |
| 231 | * from disk into the original request pages, in the best case it will |
| 232 | * just put random data into unused pages; but typically it will corrupt |
| 233 | * meanwhile completely unrelated data, causing all sorts of damage. |
| 234 | * |
| 235 | * Which means delayed successful completion, |
| 236 | * especially for READ requests, |
| 237 | * is a reason to panic(). |
| 238 | * |
| 239 | * We assume that a delayed *error* completion is OK, |
| 240 | * though we still will complain noisily about it. |
| 241 | */ |
| 242 | if (unlikely(req->rq_state & RQ_LOCAL_ABORTED)) { |
| 243 | if (__ratelimit(&drbd_ratelimit_state)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 244 | drbd_emerg(device, "delayed completion of aborted local request; disk-timeout may be too aggressive\n"); |
Philipp Reisner | 1b6dd25 | 2012-09-04 15:16:20 +0200 | [diff] [blame] | 245 | |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 246 | if (!bio->bi_status) |
Lars Ellenberg | 142207f | 2015-02-19 13:48:59 +0100 | [diff] [blame] | 247 | drbd_panic_after_delayed_completion_of_aborted_request(device); |
Philipp Reisner | 1b6dd25 | 2012-09-04 15:16:20 +0200 | [diff] [blame] | 248 | } |
| 249 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 250 | /* to avoid recursion in __req_mod */ |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 251 | if (unlikely(bio->bi_status)) { |
Christoph Hellwig | 7024628 | 2016-07-19 11:28:41 +0200 | [diff] [blame] | 252 | switch (bio_op(bio)) { |
Christoph Hellwig | 45c2179 | 2017-04-05 19:21:22 +0200 | [diff] [blame] | 253 | case REQ_OP_WRITE_ZEROES: |
Christoph Hellwig | 7024628 | 2016-07-19 11:28:41 +0200 | [diff] [blame] | 254 | case REQ_OP_DISCARD: |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 255 | if (bio->bi_status == BLK_STS_NOTSUPP) |
Christoph Hellwig | 7024628 | 2016-07-19 11:28:41 +0200 | [diff] [blame] | 256 | what = DISCARD_COMPLETED_NOTSUPP; |
| 257 | else |
| 258 | what = DISCARD_COMPLETED_WITH_ERROR; |
| 259 | break; |
| 260 | case REQ_OP_READ: |
Jens Axboe | 1eff9d3 | 2016-08-05 15:35:16 -0600 | [diff] [blame] | 261 | if (bio->bi_opf & REQ_RAHEAD) |
Christoph Hellwig | 7024628 | 2016-07-19 11:28:41 +0200 | [diff] [blame] | 262 | what = READ_AHEAD_COMPLETED_WITH_ERROR; |
| 263 | else |
| 264 | what = READ_COMPLETED_WITH_ERROR; |
| 265 | break; |
| 266 | default: |
| 267 | what = WRITE_COMPLETED_WITH_ERROR; |
| 268 | break; |
| 269 | } |
| 270 | } else { |
Andreas Gruenbacher | 8554df1 | 2011-01-25 15:37:43 +0100 | [diff] [blame] | 271 | what = COMPLETED_OK; |
Christoph Hellwig | 7024628 | 2016-07-19 11:28:41 +0200 | [diff] [blame] | 272 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 273 | |
Christoph Hellwig | 4e4cbee | 2017-06-03 09:38:06 +0200 | [diff] [blame] | 274 | req->private_bio = ERR_PTR(blk_status_to_errno(bio->bi_status)); |
Lars Ellenberg | 64dafbc | 2018-06-25 11:39:52 +0200 | [diff] [blame] | 275 | bio_put(bio); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 276 | |
Lars Ellenberg | a115413 | 2010-11-13 20:42:29 +0100 | [diff] [blame] | 277 | /* not req_mod(), we need irqsave here! */ |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 278 | spin_lock_irqsave(&device->resource->req_lock, flags); |
Lars Ellenberg | a115413 | 2010-11-13 20:42:29 +0100 | [diff] [blame] | 279 | __req_mod(req, what, &m); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 280 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 281 | put_ldev(device); |
Lars Ellenberg | a115413 | 2010-11-13 20:42:29 +0100 | [diff] [blame] | 282 | |
| 283 | if (m.bio) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 284 | complete_master_bio(device, &m); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 285 | } |
| 286 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 287 | void drbd_csum_ee(struct crypto_shash *tfm, struct drbd_peer_request *peer_req, void *digest) |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 288 | { |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 289 | SHASH_DESC_ON_STACK(desc, tfm); |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 290 | struct page *page = peer_req->pages; |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 291 | struct page *tmp; |
| 292 | unsigned len; |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 293 | void *src; |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 294 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 295 | desc->tfm = tfm; |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 296 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 297 | crypto_shash_init(desc); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 298 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 299 | src = kmap_atomic(page); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 300 | while ((tmp = page_chain_next(page))) { |
| 301 | /* all but the last page will be fully used */ |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 302 | crypto_shash_update(desc, src, PAGE_SIZE); |
| 303 | kunmap_atomic(src); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 304 | page = tmp; |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 305 | src = kmap_atomic(page); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 306 | } |
| 307 | /* and now the last, possibly only partially used page */ |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 308 | len = peer_req->i.size & (PAGE_SIZE - 1); |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 309 | crypto_shash_update(desc, src, len ?: PAGE_SIZE); |
| 310 | kunmap_atomic(src); |
| 311 | |
| 312 | crypto_shash_final(desc, digest); |
| 313 | shash_desc_zero(desc); |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 314 | } |
| 315 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 316 | void drbd_csum_bio(struct crypto_shash *tfm, struct bio *bio, void *digest) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 317 | { |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 318 | SHASH_DESC_ON_STACK(desc, tfm); |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 319 | struct bio_vec bvec; |
| 320 | struct bvec_iter iter; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 321 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 322 | desc->tfm = tfm; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 323 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 324 | crypto_shash_init(desc); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 325 | |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 326 | bio_for_each_segment(bvec, bio, iter) { |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 327 | u8 *src; |
| 328 | |
| 329 | src = kmap_atomic(bvec.bv_page); |
| 330 | crypto_shash_update(desc, src + bvec.bv_offset, bvec.bv_len); |
| 331 | kunmap_atomic(src); |
| 332 | |
Lars Ellenberg | 9104d31 | 2016-06-14 00:26:31 +0200 | [diff] [blame] | 333 | /* REQ_OP_WRITE_SAME has only one segment, |
| 334 | * checksum the payload only once. */ |
| 335 | if (bio_op(bio) == REQ_OP_WRITE_SAME) |
| 336 | break; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 337 | } |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 338 | crypto_shash_final(desc, digest); |
| 339 | shash_desc_zero(desc); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 340 | } |
| 341 | |
Lars Ellenberg | 9676c76 | 2011-02-22 14:02:31 +0100 | [diff] [blame] | 342 | /* MAYBE merge common code with w_e_end_ov_req */ |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 343 | static int w_e_send_csum(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 344 | { |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 345 | struct drbd_peer_request *peer_req = container_of(w, struct drbd_peer_request, w); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 346 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 347 | struct drbd_device *device = peer_device->device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 348 | int digest_size; |
| 349 | void *digest; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 350 | int err = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 351 | |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 352 | if (unlikely(cancel)) |
| 353 | goto out; |
| 354 | |
Lars Ellenberg | 9676c76 | 2011-02-22 14:02:31 +0100 | [diff] [blame] | 355 | if (unlikely((peer_req->flags & EE_WAS_ERROR) != 0)) |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 356 | goto out; |
| 357 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 358 | digest_size = crypto_shash_digestsize(peer_device->connection->csums_tfm); |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 359 | digest = kmalloc(digest_size, GFP_NOIO); |
| 360 | if (digest) { |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 361 | sector_t sector = peer_req->i.sector; |
| 362 | unsigned int size = peer_req->i.size; |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 363 | drbd_csum_ee(peer_device->connection->csums_tfm, peer_req, digest); |
Lars Ellenberg | 9676c76 | 2011-02-22 14:02:31 +0100 | [diff] [blame] | 364 | /* Free peer_req and pages before send. |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 365 | * In case we block on congestion, we could otherwise run into |
| 366 | * some distributed deadlock, if the other side blocks on |
| 367 | * congestion as well, because our receiver blocks in |
Andreas Gruenbacher | c37c8ec | 2011-04-07 21:02:09 +0200 | [diff] [blame] | 368 | * drbd_alloc_pages due to pp_in_use > max_buffers. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 369 | drbd_free_peer_req(device, peer_req); |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 370 | peer_req = NULL; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 371 | inc_rs_pending(device); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 372 | err = drbd_send_drequest_csum(peer_device, sector, size, |
Andreas Gruenbacher | db1b0b7 | 2011-03-16 01:37:21 +0100 | [diff] [blame] | 373 | digest, digest_size, |
| 374 | P_CSUM_RS_REQUEST); |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 375 | kfree(digest); |
| 376 | } else { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 377 | drbd_err(device, "kmalloc() of digest failed.\n"); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 378 | err = -ENOMEM; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 379 | } |
| 380 | |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 381 | out: |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 382 | if (peer_req) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 383 | drbd_free_peer_req(device, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 384 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 385 | if (unlikely(err)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 386 | drbd_err(device, "drbd_send_drequest(..., csum) failed\n"); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 387 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | #define GFP_TRY (__GFP_HIGHMEM | __GFP_NOWARN) |
| 391 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 392 | static int read_for_csum(struct drbd_peer_device *peer_device, sector_t sector, int size) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 393 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 394 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 395 | struct drbd_peer_request *peer_req; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 396 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 397 | if (!get_ldev(device)) |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 398 | return -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 399 | |
| 400 | /* GFP_TRY, because if there is no memory available right now, this may |
| 401 | * be rescheduled for later. It is "only" background resync, after all. */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 402 | peer_req = drbd_alloc_peer_req(peer_device, ID_SYNCER /* unused */, sector, |
Lars Ellenberg | 9104d31 | 2016-06-14 00:26:31 +0200 | [diff] [blame] | 403 | size, size, GFP_TRY); |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 404 | if (!peer_req) |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 405 | goto defer; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 406 | |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 407 | peer_req->w.cb = w_e_send_csum; |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 408 | spin_lock_irq(&device->resource->req_lock); |
Lars Ellenberg | b9ed708 | 2014-04-23 12:15:35 +0200 | [diff] [blame] | 409 | list_add_tail(&peer_req->w.list, &device->read_ee); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 410 | spin_unlock_irq(&device->resource->req_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 411 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 412 | atomic_add(size >> 9, &device->rs_sect_ev); |
Mike Christie | bb3cc85 | 2016-06-05 14:32:06 -0500 | [diff] [blame] | 413 | if (drbd_submit_peer_request(device, peer_req, REQ_OP_READ, 0, |
| 414 | DRBD_FAULT_RS_RD) == 0) |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 415 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 416 | |
Lars Ellenberg | 10f6d992 | 2011-01-24 14:47:09 +0100 | [diff] [blame] | 417 | /* If it failed because of ENOMEM, retry should help. If it failed |
| 418 | * because bio_add_page failed (probably broken lower level driver), |
| 419 | * retry may or may not help. |
| 420 | * If it does not, you may need to force disconnect. */ |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 421 | spin_lock_irq(&device->resource->req_lock); |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 422 | list_del(&peer_req->w.list); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 423 | spin_unlock_irq(&device->resource->req_lock); |
Lars Ellenberg | 22cc37a | 2010-09-14 20:40:41 +0200 | [diff] [blame] | 424 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 425 | drbd_free_peer_req(device, peer_req); |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 426 | defer: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 427 | put_ldev(device); |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 428 | return -EAGAIN; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 429 | } |
| 430 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 431 | int w_resync_timer(struct drbd_work *w, int cancel) |
Philipp Reisner | 794abb7 | 2010-12-27 11:51:23 +0100 | [diff] [blame] | 432 | { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 433 | struct drbd_device *device = |
| 434 | container_of(w, struct drbd_device, resync_work); |
| 435 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 436 | switch (device->state.conn) { |
Philipp Reisner | 794abb7 | 2010-12-27 11:51:23 +0100 | [diff] [blame] | 437 | case C_VERIFY_S: |
Andreas Gruenbacher | d448a2e | 2011-08-25 16:59:58 +0200 | [diff] [blame] | 438 | make_ov_request(device, cancel); |
Philipp Reisner | 794abb7 | 2010-12-27 11:51:23 +0100 | [diff] [blame] | 439 | break; |
| 440 | case C_SYNC_TARGET: |
Andreas Gruenbacher | d448a2e | 2011-08-25 16:59:58 +0200 | [diff] [blame] | 441 | make_resync_request(device, cancel); |
Philipp Reisner | 794abb7 | 2010-12-27 11:51:23 +0100 | [diff] [blame] | 442 | break; |
| 443 | } |
| 444 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 445 | return 0; |
Philipp Reisner | 794abb7 | 2010-12-27 11:51:23 +0100 | [diff] [blame] | 446 | } |
| 447 | |
Kees Cook | 2bccef3 | 2017-10-17 20:33:01 -0700 | [diff] [blame] | 448 | void resync_timer_fn(struct timer_list *t) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 449 | { |
Kees Cook | 2bccef3 | 2017-10-17 20:33:01 -0700 | [diff] [blame] | 450 | struct drbd_device *device = from_timer(device, t, resync_timer); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 451 | |
Lars Ellenberg | 15e26f6a | 2014-04-28 11:43:21 +0200 | [diff] [blame] | 452 | drbd_queue_work_if_unqueued( |
| 453 | &first_peer_device(device)->connection->sender_work, |
| 454 | &device->resync_work); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 455 | } |
| 456 | |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 457 | static void fifo_set(struct fifo_buffer *fb, int value) |
| 458 | { |
| 459 | int i; |
| 460 | |
| 461 | for (i = 0; i < fb->size; i++) |
Philipp Reisner | f10f262 | 2010-10-05 16:50:17 +0200 | [diff] [blame] | 462 | fb->values[i] = value; |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | static int fifo_push(struct fifo_buffer *fb, int value) |
| 466 | { |
| 467 | int ov; |
| 468 | |
| 469 | ov = fb->values[fb->head_index]; |
| 470 | fb->values[fb->head_index++] = value; |
| 471 | |
| 472 | if (fb->head_index >= fb->size) |
| 473 | fb->head_index = 0; |
| 474 | |
| 475 | return ov; |
| 476 | } |
| 477 | |
| 478 | static void fifo_add_val(struct fifo_buffer *fb, int value) |
| 479 | { |
| 480 | int i; |
| 481 | |
| 482 | for (i = 0; i < fb->size; i++) |
| 483 | fb->values[i] += value; |
| 484 | } |
| 485 | |
Stephen Kitt | 6a36587 | 2020-01-24 21:03:07 +0100 | [diff] [blame] | 486 | struct fifo_buffer *fifo_alloc(unsigned int fifo_size) |
Philipp Reisner | 9958c85 | 2011-05-03 16:19:31 +0200 | [diff] [blame] | 487 | { |
| 488 | struct fifo_buffer *fb; |
| 489 | |
Stephen Kitt | 6a36587 | 2020-01-24 21:03:07 +0100 | [diff] [blame] | 490 | fb = kzalloc(struct_size(fb, values, fifo_size), GFP_NOIO); |
Philipp Reisner | 9958c85 | 2011-05-03 16:19:31 +0200 | [diff] [blame] | 491 | if (!fb) |
| 492 | return NULL; |
| 493 | |
| 494 | fb->head_index = 0; |
| 495 | fb->size = fifo_size; |
| 496 | fb->total = 0; |
| 497 | |
| 498 | return fb; |
| 499 | } |
| 500 | |
Lars Ellenberg | 0e49d7b | 2014-04-28 18:43:18 +0200 | [diff] [blame] | 501 | static int drbd_rs_controller(struct drbd_device *device, unsigned int sect_in) |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 502 | { |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 503 | struct disk_conf *dc; |
Lars Ellenberg | 7f34f61 | 2014-04-22 16:37:16 +0200 | [diff] [blame] | 504 | unsigned int want; /* The number of sectors we want in-flight */ |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 505 | int req_sect; /* Number of sectors to request in this turn */ |
Lars Ellenberg | 7f34f61 | 2014-04-22 16:37:16 +0200 | [diff] [blame] | 506 | int correction; /* Number of sectors more we need in-flight */ |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 507 | int cps; /* correction per invocation of drbd_rs_controller() */ |
| 508 | int steps; /* Number of time steps to plan ahead */ |
| 509 | int curr_corr; |
| 510 | int max_sect; |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 511 | struct fifo_buffer *plan; |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 512 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 513 | dc = rcu_dereference(device->ldev->disk_conf); |
| 514 | plan = rcu_dereference(device->rs_plan_s); |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 515 | |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 516 | steps = plan->size; /* (dc->c_plan_ahead * 10 * SLEEP_TIME) / HZ; */ |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 517 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 518 | if (device->rs_in_flight + sect_in == 0) { /* At start of resync */ |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 519 | want = ((dc->resync_rate * 2 * SLEEP_TIME) / HZ) * steps; |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 520 | } else { /* normal path */ |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 521 | want = dc->c_fill_target ? dc->c_fill_target : |
| 522 | sect_in * dc->c_delay_target * HZ / (SLEEP_TIME * 10); |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 523 | } |
| 524 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 525 | correction = want - device->rs_in_flight - plan->total; |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 526 | |
| 527 | /* Plan ahead */ |
| 528 | cps = correction / steps; |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 529 | fifo_add_val(plan, cps); |
| 530 | plan->total += cps * steps; |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 531 | |
| 532 | /* What we do in this step */ |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 533 | curr_corr = fifo_push(plan, 0); |
| 534 | plan->total -= curr_corr; |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 535 | |
| 536 | req_sect = sect_in + curr_corr; |
| 537 | if (req_sect < 0) |
| 538 | req_sect = 0; |
| 539 | |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 540 | max_sect = (dc->c_max_rate * 2 * SLEEP_TIME) / HZ; |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 541 | if (req_sect > max_sect) |
| 542 | req_sect = max_sect; |
| 543 | |
| 544 | /* |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 545 | drbd_warn(device, "si=%u if=%d wa=%u co=%d st=%d cps=%d pl=%d cc=%d rs=%d\n", |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 546 | sect_in, device->rs_in_flight, want, correction, |
| 547 | steps, cps, device->rs_planed, curr_corr, req_sect); |
Philipp Reisner | 778f271 | 2010-07-06 11:14:00 +0200 | [diff] [blame] | 548 | */ |
| 549 | |
| 550 | return req_sect; |
| 551 | } |
| 552 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 553 | static int drbd_rs_number_requests(struct drbd_device *device) |
Lars Ellenberg | e65f440 | 2010-11-05 10:04:07 +0100 | [diff] [blame] | 554 | { |
Lars Ellenberg | 0e49d7b | 2014-04-28 18:43:18 +0200 | [diff] [blame] | 555 | unsigned int sect_in; /* Number of sectors that came in since the last turn */ |
| 556 | int number, mxb; |
| 557 | |
| 558 | sect_in = atomic_xchg(&device->rs_sect_in, 0); |
| 559 | device->rs_in_flight -= sect_in; |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 560 | |
| 561 | rcu_read_lock(); |
Lars Ellenberg | 0e49d7b | 2014-04-28 18:43:18 +0200 | [diff] [blame] | 562 | mxb = drbd_get_max_buffers(device) / 2; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 563 | if (rcu_dereference(device->rs_plan_s)->size) { |
Lars Ellenberg | 0e49d7b | 2014-04-28 18:43:18 +0200 | [diff] [blame] | 564 | number = drbd_rs_controller(device, sect_in) >> (BM_BLOCK_SHIFT - 9); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 565 | device->c_sync_rate = number * HZ * (BM_BLOCK_SIZE / 1024) / SLEEP_TIME; |
Lars Ellenberg | e65f440 | 2010-11-05 10:04:07 +0100 | [diff] [blame] | 566 | } else { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 567 | device->c_sync_rate = rcu_dereference(device->ldev->disk_conf)->resync_rate; |
| 568 | number = SLEEP_TIME * device->c_sync_rate / ((BM_BLOCK_SIZE / 1024) * HZ); |
Lars Ellenberg | e65f440 | 2010-11-05 10:04:07 +0100 | [diff] [blame] | 569 | } |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 570 | rcu_read_unlock(); |
Lars Ellenberg | e65f440 | 2010-11-05 10:04:07 +0100 | [diff] [blame] | 571 | |
Lars Ellenberg | 0e49d7b | 2014-04-28 18:43:18 +0200 | [diff] [blame] | 572 | /* Don't have more than "max-buffers"/2 in-flight. |
| 573 | * Otherwise we may cause the remote site to stall on drbd_alloc_pages(), |
| 574 | * potentially causing a distributed deadlock on congestion during |
| 575 | * online-verify or (checksum-based) resync, if max-buffers, |
| 576 | * socket buffer sizes and resync rate settings are mis-configured. */ |
Lars Ellenberg | 7f34f61 | 2014-04-22 16:37:16 +0200 | [diff] [blame] | 577 | |
| 578 | /* note that "number" is in units of "BM_BLOCK_SIZE" (which is 4k), |
| 579 | * mxb (as used here, and in drbd_alloc_pages on the peer) is |
| 580 | * "number of pages" (typically also 4k), |
| 581 | * but "rs_in_flight" is in "sectors" (512 Byte). */ |
| 582 | if (mxb - device->rs_in_flight/8 < number) |
| 583 | number = mxb - device->rs_in_flight/8; |
Lars Ellenberg | 0e49d7b | 2014-04-28 18:43:18 +0200 | [diff] [blame] | 584 | |
Lars Ellenberg | e65f440 | 2010-11-05 10:04:07 +0100 | [diff] [blame] | 585 | return number; |
| 586 | } |
| 587 | |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 588 | static int make_resync_request(struct drbd_device *const device, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 589 | { |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 590 | struct drbd_peer_device *const peer_device = first_peer_device(device); |
| 591 | struct drbd_connection *const connection = peer_device ? peer_device->connection : NULL; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 592 | unsigned long bit; |
| 593 | sector_t sector; |
Christoph Hellwig | 155bd9d | 2020-09-25 18:06:17 +0200 | [diff] [blame] | 594 | const sector_t capacity = get_capacity(device->vdisk); |
Lars Ellenberg | 1816a2b | 2010-11-11 15:19:07 +0100 | [diff] [blame] | 595 | int max_bio_size; |
Lars Ellenberg | e65f440 | 2010-11-05 10:04:07 +0100 | [diff] [blame] | 596 | int number, rollback_i, size; |
Lars Ellenberg | 506afb6 | 2014-01-31 14:55:12 +0100 | [diff] [blame] | 597 | int align, requeue = 0; |
Lars Ellenberg | 0f0601f | 2010-08-11 23:40:24 +0200 | [diff] [blame] | 598 | int i = 0; |
Philipp Reisner | 92d94ae | 2016-06-14 00:26:15 +0200 | [diff] [blame] | 599 | int discard_granularity = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 600 | |
| 601 | if (unlikely(cancel)) |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 602 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 603 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 604 | if (device->rs_total == 0) { |
Lars Ellenberg | af85e8e | 2010-10-07 16:07:55 +0200 | [diff] [blame] | 605 | /* empty resync? */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 606 | drbd_resync_finished(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 607 | return 0; |
Lars Ellenberg | af85e8e | 2010-10-07 16:07:55 +0200 | [diff] [blame] | 608 | } |
| 609 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 610 | if (!get_ldev(device)) { |
| 611 | /* Since we only need to access device->rsync a |
| 612 | get_ldev_if_state(device,D_FAILED) would be sufficient, but |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 613 | to continue resync with a broken disk makes no sense at |
| 614 | all */ |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 615 | drbd_err(device, "Disk broke down during resync!\n"); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 616 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 617 | } |
| 618 | |
Lars Ellenberg | 9104d31 | 2016-06-14 00:26:31 +0200 | [diff] [blame] | 619 | if (connection->agreed_features & DRBD_FF_THIN_RESYNC) { |
Philipp Reisner | 92d94ae | 2016-06-14 00:26:15 +0200 | [diff] [blame] | 620 | rcu_read_lock(); |
| 621 | discard_granularity = rcu_dereference(device->ldev->disk_conf)->rs_discard_granularity; |
| 622 | rcu_read_unlock(); |
| 623 | } |
| 624 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 625 | max_bio_size = queue_max_hw_sectors(device->rq_queue) << 9; |
| 626 | number = drbd_rs_number_requests(device); |
Lars Ellenberg | 0e49d7b | 2014-04-28 18:43:18 +0200 | [diff] [blame] | 627 | if (number <= 0) |
Lars Ellenberg | 0f0601f | 2010-08-11 23:40:24 +0200 | [diff] [blame] | 628 | goto requeue; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 629 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 630 | for (i = 0; i < number; i++) { |
Lars Ellenberg | 506afb6 | 2014-01-31 14:55:12 +0100 | [diff] [blame] | 631 | /* Stop generating RS requests when half of the send buffer is filled, |
| 632 | * but notify TCP that we'd like to have more space. */ |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 633 | mutex_lock(&connection->data.mutex); |
| 634 | if (connection->data.socket) { |
Lars Ellenberg | 506afb6 | 2014-01-31 14:55:12 +0100 | [diff] [blame] | 635 | struct sock *sk = connection->data.socket->sk; |
| 636 | int queued = sk->sk_wmem_queued; |
| 637 | int sndbuf = sk->sk_sndbuf; |
| 638 | if (queued > sndbuf / 2) { |
| 639 | requeue = 1; |
| 640 | if (sk->sk_socket) |
| 641 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 642 | } |
| 643 | } else |
| 644 | requeue = 1; |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 645 | mutex_unlock(&connection->data.mutex); |
Lars Ellenberg | 506afb6 | 2014-01-31 14:55:12 +0100 | [diff] [blame] | 646 | if (requeue) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 647 | goto requeue; |
| 648 | |
| 649 | next_sector: |
| 650 | size = BM_BLOCK_SIZE; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 651 | bit = drbd_bm_find_next(device, device->bm_resync_fo); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 652 | |
Lars Ellenberg | 4b0715f | 2010-12-14 15:13:04 +0100 | [diff] [blame] | 653 | if (bit == DRBD_END_OF_BITMAP) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 654 | device->bm_resync_fo = drbd_bm_bits(device); |
| 655 | put_ldev(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 656 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 657 | } |
| 658 | |
| 659 | sector = BM_BIT_TO_SECT(bit); |
| 660 | |
Lars Ellenberg | ad3fee7 | 2013-12-20 11:22:13 +0100 | [diff] [blame] | 661 | if (drbd_try_rs_begin_io(device, sector)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 662 | device->bm_resync_fo = bit; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 663 | goto requeue; |
| 664 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 665 | device->bm_resync_fo = bit + 1; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 666 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 667 | if (unlikely(drbd_bm_test_bit(device, bit) == 0)) { |
| 668 | drbd_rs_complete_io(device, sector); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 669 | goto next_sector; |
| 670 | } |
| 671 | |
Lars Ellenberg | 1816a2b | 2010-11-11 15:19:07 +0100 | [diff] [blame] | 672 | #if DRBD_MAX_BIO_SIZE > BM_BLOCK_SIZE |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 673 | /* try to find some adjacent bits. |
| 674 | * we stop if we have already the maximum req size. |
| 675 | * |
| 676 | * Additionally always align bigger requests, in order to |
| 677 | * be prepared for all stripe sizes of software RAIDs. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 678 | */ |
| 679 | align = 1; |
Philipp Reisner | d207450 | 2010-07-22 15:27:27 +0200 | [diff] [blame] | 680 | rollback_i = i; |
Lars Ellenberg | 6377b92 | 2014-04-28 18:43:17 +0200 | [diff] [blame] | 681 | while (i < number) { |
Lars Ellenberg | 1816a2b | 2010-11-11 15:19:07 +0100 | [diff] [blame] | 682 | if (size + BM_BLOCK_SIZE > max_bio_size) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 683 | break; |
| 684 | |
| 685 | /* Be always aligned */ |
| 686 | if (sector & ((1<<(align+3))-1)) |
| 687 | break; |
| 688 | |
Philipp Reisner | 92d94ae | 2016-06-14 00:26:15 +0200 | [diff] [blame] | 689 | if (discard_granularity && size == discard_granularity) |
| 690 | break; |
| 691 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 692 | /* do not cross extent boundaries */ |
| 693 | if (((bit+1) & BM_BLOCKS_PER_BM_EXT_MASK) == 0) |
| 694 | break; |
| 695 | /* now, is it actually dirty, after all? |
| 696 | * caution, drbd_bm_test_bit is tri-state for some |
| 697 | * obscure reason; ( b == 0 ) would get the out-of-band |
| 698 | * only accidentally right because of the "oddly sized" |
| 699 | * adjustment below */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 700 | if (drbd_bm_test_bit(device, bit+1) != 1) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 701 | break; |
| 702 | bit++; |
| 703 | size += BM_BLOCK_SIZE; |
| 704 | if ((BM_BLOCK_SIZE << align) <= size) |
| 705 | align++; |
| 706 | i++; |
| 707 | } |
| 708 | /* if we merged some, |
| 709 | * reset the offset to start the next drbd_bm_find_next from */ |
| 710 | if (size > BM_BLOCK_SIZE) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 711 | device->bm_resync_fo = bit + 1; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 712 | #endif |
| 713 | |
| 714 | /* adjust very last sectors, in case we are oddly sized */ |
| 715 | if (sector + (size>>9) > capacity) |
| 716 | size = (capacity-sector)<<9; |
Lars Ellenberg | aaaba34 | 2014-03-18 12:30:09 +0100 | [diff] [blame] | 717 | |
| 718 | if (device->use_csums) { |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 719 | switch (read_for_csum(peer_device, sector, size)) { |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 720 | case -EIO: /* Disk failure */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 721 | put_ldev(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 722 | return -EIO; |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 723 | case -EAGAIN: /* allocation failed, or ldev busy */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 724 | drbd_rs_complete_io(device, sector); |
| 725 | device->bm_resync_fo = BM_SECT_TO_BIT(sector); |
Philipp Reisner | d207450 | 2010-07-22 15:27:27 +0200 | [diff] [blame] | 726 | i = rollback_i; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 727 | goto requeue; |
Lars Ellenberg | 80a40e4 | 2010-08-11 23:28:00 +0200 | [diff] [blame] | 728 | case 0: |
| 729 | /* everything ok */ |
| 730 | break; |
| 731 | default: |
| 732 | BUG(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 733 | } |
| 734 | } else { |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 735 | int err; |
| 736 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 737 | inc_rs_pending(device); |
Philipp Reisner | 92d94ae | 2016-06-14 00:26:15 +0200 | [diff] [blame] | 738 | err = drbd_send_drequest(peer_device, |
| 739 | size == discard_granularity ? P_RS_THIN_REQ : P_RS_DATA_REQUEST, |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 740 | sector, size, ID_SYNCER); |
| 741 | if (err) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 742 | drbd_err(device, "drbd_send_drequest() failed, aborting...\n"); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 743 | dec_rs_pending(device); |
| 744 | put_ldev(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 745 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 746 | } |
| 747 | } |
| 748 | } |
| 749 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 750 | if (device->bm_resync_fo >= drbd_bm_bits(device)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 751 | /* last syncer _request_ was sent, |
| 752 | * but the P_RS_DATA_REPLY not yet received. sync will end (and |
| 753 | * next sync group will resume), as soon as we receive the last |
| 754 | * resync data block, and the last bit is cleared. |
| 755 | * until then resync "work" is "inactive" ... |
| 756 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 757 | put_ldev(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 758 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | requeue: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 762 | device->rs_in_flight += (i << (BM_BLOCK_SHIFT - 9)); |
| 763 | mod_timer(&device->resync_timer, jiffies + SLEEP_TIME); |
| 764 | put_ldev(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 765 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 766 | } |
| 767 | |
Andreas Gruenbacher | d448a2e | 2011-08-25 16:59:58 +0200 | [diff] [blame] | 768 | static int make_ov_request(struct drbd_device *device, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 769 | { |
| 770 | int number, i, size; |
| 771 | sector_t sector; |
Christoph Hellwig | 155bd9d | 2020-09-25 18:06:17 +0200 | [diff] [blame] | 772 | const sector_t capacity = get_capacity(device->vdisk); |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 773 | bool stop_sector_reached = false; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 774 | |
| 775 | if (unlikely(cancel)) |
| 776 | return 1; |
| 777 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 778 | number = drbd_rs_number_requests(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 779 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 780 | sector = device->ov_position; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 781 | for (i = 0; i < number; i++) { |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 782 | if (sector >= capacity) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 783 | return 1; |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 784 | |
| 785 | /* We check for "finished" only in the reply path: |
| 786 | * w_e_end_ov_reply(). |
| 787 | * We need to send at least one request out. */ |
| 788 | stop_sector_reached = i > 0 |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 789 | && verify_can_do_stop_sector(device) |
| 790 | && sector >= device->ov_stop_sector; |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 791 | if (stop_sector_reached) |
| 792 | break; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 793 | |
| 794 | size = BM_BLOCK_SIZE; |
| 795 | |
Lars Ellenberg | ad3fee7 | 2013-12-20 11:22:13 +0100 | [diff] [blame] | 796 | if (drbd_try_rs_begin_io(device, sector)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 797 | device->ov_position = sector; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 798 | goto requeue; |
| 799 | } |
| 800 | |
| 801 | if (sector + (size>>9) > capacity) |
| 802 | size = (capacity-sector)<<9; |
| 803 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 804 | inc_rs_pending(device); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 805 | if (drbd_send_ov_request(first_peer_device(device), sector, size)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 806 | dec_rs_pending(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 807 | return 0; |
| 808 | } |
| 809 | sector += BM_SECT_PER_BIT; |
| 810 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 811 | device->ov_position = sector; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 812 | |
| 813 | requeue: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 814 | device->rs_in_flight += (i << (BM_BLOCK_SHIFT - 9)); |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 815 | if (i == 0 || !stop_sector_reached) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 816 | mod_timer(&device->resync_timer, jiffies + SLEEP_TIME); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 817 | return 1; |
| 818 | } |
| 819 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 820 | int w_ov_finished(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 821 | { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 822 | struct drbd_device_work *dw = |
| 823 | container_of(w, struct drbd_device_work, w); |
| 824 | struct drbd_device *device = dw->device; |
| 825 | kfree(dw); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 826 | ov_out_of_sync_print(device); |
| 827 | drbd_resync_finished(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 828 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 829 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 830 | } |
| 831 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 832 | static int w_resync_finished(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 833 | { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 834 | struct drbd_device_work *dw = |
| 835 | container_of(w, struct drbd_device_work, w); |
| 836 | struct drbd_device *device = dw->device; |
| 837 | kfree(dw); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 838 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 839 | drbd_resync_finished(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 840 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 841 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 842 | } |
| 843 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 844 | static void ping_peer(struct drbd_device *device) |
Lars Ellenberg | af85e8e | 2010-10-07 16:07:55 +0200 | [diff] [blame] | 845 | { |
Andreas Gruenbacher | a6b32bc3 | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 846 | struct drbd_connection *connection = first_peer_device(device)->connection; |
Philipp Reisner | 2a67d8b | 2011-02-09 14:10:32 +0100 | [diff] [blame] | 847 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 848 | clear_bit(GOT_PING_ACK, &connection->flags); |
| 849 | request_ping(connection); |
| 850 | wait_event(connection->ping_wait, |
| 851 | test_bit(GOT_PING_ACK, &connection->flags) || device->state.conn < C_CONNECTED); |
Lars Ellenberg | af85e8e | 2010-10-07 16:07:55 +0200 | [diff] [blame] | 852 | } |
| 853 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 854 | int drbd_resync_finished(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 855 | { |
Lars Ellenberg | 26a9611 | 2016-06-14 00:26:25 +0200 | [diff] [blame] | 856 | struct drbd_connection *connection = first_peer_device(device)->connection; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 857 | unsigned long db, dt, dbdt; |
| 858 | unsigned long n_oos; |
| 859 | union drbd_state os, ns; |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 860 | struct drbd_device_work *dw; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 861 | char *khelper_cmd = NULL; |
Lars Ellenberg | 2652561 | 2010-11-05 09:56:33 +0100 | [diff] [blame] | 862 | int verify_done = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 863 | |
| 864 | /* Remove all elements from the resync LRU. Since future actions |
| 865 | * might set bits in the (main) bitmap, then the entries in the |
| 866 | * resync LRU would be wrong. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 867 | if (drbd_rs_del_all(device)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 868 | /* In case this is not possible now, most probably because |
| 869 | * there are P_RS_DATA_REPLY Packets lingering on the worker's |
| 870 | * queue (or even the read operations for those packets |
| 871 | * is not finished by now). Retry in 100ms. */ |
| 872 | |
Philipp Reisner | 20ee639 | 2011-01-18 15:28:59 +0100 | [diff] [blame] | 873 | schedule_timeout_interruptible(HZ / 10); |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 874 | dw = kmalloc(sizeof(struct drbd_device_work), GFP_ATOMIC); |
| 875 | if (dw) { |
| 876 | dw->w.cb = w_resync_finished; |
| 877 | dw->device = device; |
Lars Ellenberg | 26a9611 | 2016-06-14 00:26:25 +0200 | [diff] [blame] | 878 | drbd_queue_work(&connection->sender_work, &dw->w); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 879 | return 1; |
| 880 | } |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 881 | drbd_err(device, "Warn failed to drbd_rs_del_all() and to kmalloc(dw).\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 882 | } |
| 883 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 884 | dt = (jiffies - device->rs_start - device->rs_paused) / HZ; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 885 | if (dt <= 0) |
| 886 | dt = 1; |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 887 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 888 | db = device->rs_total; |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 889 | /* adjust for verify start and stop sectors, respective reached position */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 890 | if (device->state.conn == C_VERIFY_S || device->state.conn == C_VERIFY_T) |
| 891 | db -= device->ov_left; |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 892 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 893 | dbdt = Bit2KB(db/dt); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 894 | device->rs_paused /= HZ; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 895 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 896 | if (!get_ldev(device)) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 897 | goto out; |
| 898 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 899 | ping_peer(device); |
Lars Ellenberg | af85e8e | 2010-10-07 16:07:55 +0200 | [diff] [blame] | 900 | |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 901 | spin_lock_irq(&device->resource->req_lock); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 902 | os = drbd_read_state(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 903 | |
Lars Ellenberg | 2652561 | 2010-11-05 09:56:33 +0100 | [diff] [blame] | 904 | verify_done = (os.conn == C_VERIFY_S || os.conn == C_VERIFY_T); |
| 905 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 906 | /* This protects us against multiple calls (that can happen in the presence |
| 907 | of application IO), and against connectivity loss just before we arrive here. */ |
| 908 | if (os.conn <= C_CONNECTED) |
| 909 | goto out_unlock; |
| 910 | |
| 911 | ns = os; |
| 912 | ns.conn = C_CONNECTED; |
| 913 | |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 914 | drbd_info(device, "%s done (total %lu sec; paused %lu sec; %lu K/sec)\n", |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 915 | verify_done ? "Online verify" : "Resync", |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 916 | dt + device->rs_paused, device->rs_paused, dbdt); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 917 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 918 | n_oos = drbd_bm_total_weight(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 919 | |
| 920 | if (os.conn == C_VERIFY_S || os.conn == C_VERIFY_T) { |
| 921 | if (n_oos) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 922 | drbd_alert(device, "Online verify found %lu %dk block out of sync!\n", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 923 | n_oos, Bit2KB(1)); |
| 924 | khelper_cmd = "out-of-sync"; |
| 925 | } |
| 926 | } else { |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 927 | D_ASSERT(device, (n_oos - device->rs_failed) == 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 928 | |
| 929 | if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T) |
| 930 | khelper_cmd = "after-resync-target"; |
| 931 | |
Lars Ellenberg | aaaba34 | 2014-03-18 12:30:09 +0100 | [diff] [blame] | 932 | if (device->use_csums && device->rs_total) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 933 | const unsigned long s = device->rs_same_csum; |
| 934 | const unsigned long t = device->rs_total; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 935 | const int ratio = |
| 936 | (t == 0) ? 0 : |
| 937 | (t < 100000) ? ((s*100)/t) : (s/(t/100)); |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 938 | drbd_info(device, "%u %% had equal checksums, eliminated: %luK; " |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 939 | "transferred %luK total %luK\n", |
| 940 | ratio, |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 941 | Bit2KB(device->rs_same_csum), |
| 942 | Bit2KB(device->rs_total - device->rs_same_csum), |
| 943 | Bit2KB(device->rs_total)); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 944 | } |
| 945 | } |
| 946 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 947 | if (device->rs_failed) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 948 | drbd_info(device, " %lu failed blocks\n", device->rs_failed); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 949 | |
| 950 | if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T) { |
| 951 | ns.disk = D_INCONSISTENT; |
| 952 | ns.pdsk = D_UP_TO_DATE; |
| 953 | } else { |
| 954 | ns.disk = D_UP_TO_DATE; |
| 955 | ns.pdsk = D_INCONSISTENT; |
| 956 | } |
| 957 | } else { |
| 958 | ns.disk = D_UP_TO_DATE; |
| 959 | ns.pdsk = D_UP_TO_DATE; |
| 960 | |
| 961 | if (os.conn == C_SYNC_TARGET || os.conn == C_PAUSED_SYNC_T) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 962 | if (device->p_uuid) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 963 | int i; |
| 964 | for (i = UI_BITMAP ; i <= UI_HISTORY_END ; i++) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 965 | _drbd_uuid_set(device, i, device->p_uuid[i]); |
| 966 | drbd_uuid_set(device, UI_BITMAP, device->ldev->md.uuid[UI_CURRENT]); |
| 967 | _drbd_uuid_set(device, UI_CURRENT, device->p_uuid[UI_CURRENT]); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 968 | } else { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 969 | drbd_err(device, "device->p_uuid is NULL! BUG\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 970 | } |
| 971 | } |
| 972 | |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 973 | if (!(os.conn == C_VERIFY_S || os.conn == C_VERIFY_T)) { |
| 974 | /* for verify runs, we don't update uuids here, |
| 975 | * so there would be nothing to report. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 976 | drbd_uuid_set_bm(device, 0UL); |
| 977 | drbd_print_uuids(device, "updated UUIDs"); |
| 978 | if (device->p_uuid) { |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 979 | /* Now the two UUID sets are equal, update what we |
| 980 | * know of the peer. */ |
| 981 | int i; |
| 982 | for (i = UI_CURRENT ; i <= UI_HISTORY_END ; i++) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 983 | device->p_uuid[i] = device->ldev->md.uuid[i]; |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 984 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 985 | } |
| 986 | } |
| 987 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 988 | _drbd_set_state(device, ns, CS_VERBOSE, NULL); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 989 | out_unlock: |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 990 | spin_unlock_irq(&device->resource->req_lock); |
Lars Ellenberg | 26a9611 | 2016-06-14 00:26:25 +0200 | [diff] [blame] | 991 | |
| 992 | /* If we have been sync source, and have an effective fencing-policy, |
| 993 | * once *all* volumes are back in sync, call "unfence". */ |
| 994 | if (os.conn == C_SYNC_SOURCE) { |
| 995 | enum drbd_disk_state disk_state = D_MASK; |
| 996 | enum drbd_disk_state pdsk_state = D_MASK; |
| 997 | enum drbd_fencing_p fp = FP_DONT_CARE; |
| 998 | |
| 999 | rcu_read_lock(); |
| 1000 | fp = rcu_dereference(device->ldev->disk_conf)->fencing; |
| 1001 | if (fp != FP_DONT_CARE) { |
| 1002 | struct drbd_peer_device *peer_device; |
| 1003 | int vnr; |
| 1004 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
| 1005 | struct drbd_device *device = peer_device->device; |
| 1006 | disk_state = min_t(enum drbd_disk_state, disk_state, device->state.disk); |
| 1007 | pdsk_state = min_t(enum drbd_disk_state, pdsk_state, device->state.pdsk); |
| 1008 | } |
| 1009 | } |
| 1010 | rcu_read_unlock(); |
| 1011 | if (disk_state == D_UP_TO_DATE && pdsk_state == D_UP_TO_DATE) |
| 1012 | conn_khelper(connection, "unfence-peer"); |
| 1013 | } |
| 1014 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1015 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1016 | out: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1017 | device->rs_total = 0; |
| 1018 | device->rs_failed = 0; |
| 1019 | device->rs_paused = 0; |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 1020 | |
| 1021 | /* reset start sector, if we reached end of device */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1022 | if (verify_done && device->ov_left == 0) |
| 1023 | device->ov_start_sector = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1024 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1025 | drbd_md_sync(device); |
Lars Ellenberg | 13d4268 | 2010-10-13 17:37:54 +0200 | [diff] [blame] | 1026 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1027 | if (khelper_cmd) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1028 | drbd_khelper(device, khelper_cmd); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1029 | |
| 1030 | return 1; |
| 1031 | } |
| 1032 | |
| 1033 | /* helper */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1034 | static void move_to_net_ee_or_free(struct drbd_device *device, struct drbd_peer_request *peer_req) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1035 | { |
Andreas Gruenbacher | 045417f | 2011-04-07 21:34:24 +0200 | [diff] [blame] | 1036 | if (drbd_peer_req_has_active_page(peer_req)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1037 | /* This might happen if sendpage() has not finished */ |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1038 | int i = (peer_req->i.size + PAGE_SIZE -1) >> PAGE_SHIFT; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1039 | atomic_add(i, &device->pp_in_use_by_net); |
| 1040 | atomic_sub(i, &device->pp_in_use); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 1041 | spin_lock_irq(&device->resource->req_lock); |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 1042 | list_add_tail(&peer_req->w.list, &device->net_ee); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 1043 | spin_unlock_irq(&device->resource->req_lock); |
Lars Ellenberg | 435f074 | 2010-09-06 12:30:25 +0200 | [diff] [blame] | 1044 | wake_up(&drbd_pp_wait); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1045 | } else |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1046 | drbd_free_peer_req(device, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | /** |
| 1050 | * w_e_end_data_req() - Worker callback, to send a P_DATA_REPLY packet in response to a P_DATA_REQUEST |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1051 | * @w: work object. |
| 1052 | * @cancel: The connection will be closed anyways |
| 1053 | */ |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1054 | int w_e_end_data_req(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1055 | { |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 1056 | struct drbd_peer_request *peer_req = container_of(w, struct drbd_peer_request, w); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1057 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 1058 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1059 | int err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1060 | |
| 1061 | if (unlikely(cancel)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1062 | drbd_free_peer_req(device, peer_req); |
| 1063 | dec_unacked(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1064 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1065 | } |
| 1066 | |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1067 | if (likely((peer_req->flags & EE_WAS_ERROR) == 0)) { |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1068 | err = drbd_send_block(peer_device, P_DATA_REPLY, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1069 | } else { |
| 1070 | if (__ratelimit(&drbd_ratelimit_state)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1071 | drbd_err(device, "Sending NegDReply. sector=%llus.\n", |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1072 | (unsigned long long)peer_req->i.sector); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1073 | |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1074 | err = drbd_send_ack(peer_device, P_NEG_DREPLY, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1075 | } |
| 1076 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1077 | dec_unacked(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1078 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1079 | move_to_net_ee_or_free(device, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1080 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1081 | if (unlikely(err)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1082 | drbd_err(device, "drbd_send_block() failed\n"); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1083 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1084 | } |
| 1085 | |
Philipp Reisner | 700ca8c | 2016-06-14 00:26:13 +0200 | [diff] [blame] | 1086 | static bool all_zero(struct drbd_peer_request *peer_req) |
| 1087 | { |
| 1088 | struct page *page = peer_req->pages; |
| 1089 | unsigned int len = peer_req->i.size; |
| 1090 | |
| 1091 | page_chain_for_each(page) { |
| 1092 | unsigned int l = min_t(unsigned int, len, PAGE_SIZE); |
| 1093 | unsigned int i, words = l / sizeof(long); |
| 1094 | unsigned long *d; |
| 1095 | |
| 1096 | d = kmap_atomic(page); |
| 1097 | for (i = 0; i < words; i++) { |
| 1098 | if (d[i]) { |
| 1099 | kunmap_atomic(d); |
| 1100 | return false; |
| 1101 | } |
| 1102 | } |
| 1103 | kunmap_atomic(d); |
| 1104 | len -= l; |
| 1105 | } |
| 1106 | |
| 1107 | return true; |
| 1108 | } |
| 1109 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1110 | /** |
Andreas Gruenbacher | a209b4a | 2011-08-17 12:43:25 +0200 | [diff] [blame] | 1111 | * w_e_end_rsdata_req() - Worker callback to send a P_RS_DATA_REPLY packet in response to a P_RS_DATA_REQUEST |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1112 | * @w: work object. |
| 1113 | * @cancel: The connection will be closed anyways |
| 1114 | */ |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1115 | int w_e_end_rsdata_req(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1116 | { |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 1117 | struct drbd_peer_request *peer_req = container_of(w, struct drbd_peer_request, w); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1118 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 1119 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1120 | int err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1121 | |
| 1122 | if (unlikely(cancel)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1123 | drbd_free_peer_req(device, peer_req); |
| 1124 | dec_unacked(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1125 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1126 | } |
| 1127 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1128 | if (get_ldev_if_state(device, D_FAILED)) { |
| 1129 | drbd_rs_complete_io(device, peer_req->i.sector); |
| 1130 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1131 | } |
| 1132 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1133 | if (device->state.conn == C_AHEAD) { |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1134 | err = drbd_send_ack(peer_device, P_RS_CANCEL, peer_req); |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1135 | } else if (likely((peer_req->flags & EE_WAS_ERROR) == 0)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1136 | if (likely(device->state.pdsk >= D_INCONSISTENT)) { |
| 1137 | inc_rs_pending(device); |
Philipp Reisner | 700ca8c | 2016-06-14 00:26:13 +0200 | [diff] [blame] | 1138 | if (peer_req->flags & EE_RS_THIN_REQ && all_zero(peer_req)) |
| 1139 | err = drbd_send_rs_deallocated(peer_device, peer_req); |
| 1140 | else |
| 1141 | err = drbd_send_block(peer_device, P_RS_DATA_REPLY, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1142 | } else { |
| 1143 | if (__ratelimit(&drbd_ratelimit_state)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1144 | drbd_err(device, "Not sending RSDataReply, " |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1145 | "partner DISKLESS!\n"); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1146 | err = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1147 | } |
| 1148 | } else { |
| 1149 | if (__ratelimit(&drbd_ratelimit_state)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1150 | drbd_err(device, "Sending NegRSDReply. sector %llus.\n", |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1151 | (unsigned long long)peer_req->i.sector); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1152 | |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1153 | err = drbd_send_ack(peer_device, P_NEG_RS_DREPLY, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1154 | |
| 1155 | /* update resync data with failure */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1156 | drbd_rs_failed_io(device, peer_req->i.sector, peer_req->i.size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1157 | } |
| 1158 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1159 | dec_unacked(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1160 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1161 | move_to_net_ee_or_free(device, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1162 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1163 | if (unlikely(err)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1164 | drbd_err(device, "drbd_send_block() failed\n"); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1165 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1166 | } |
| 1167 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1168 | int w_e_end_csum_rs_req(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1169 | { |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 1170 | struct drbd_peer_request *peer_req = container_of(w, struct drbd_peer_request, w); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1171 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 1172 | struct drbd_device *device = peer_device->device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1173 | struct digest_info *di; |
| 1174 | int digest_size; |
| 1175 | void *digest = NULL; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1176 | int err, eq = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1177 | |
| 1178 | if (unlikely(cancel)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1179 | drbd_free_peer_req(device, peer_req); |
| 1180 | dec_unacked(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1181 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1182 | } |
| 1183 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1184 | if (get_ldev(device)) { |
| 1185 | drbd_rs_complete_io(device, peer_req->i.sector); |
| 1186 | put_ldev(device); |
Lars Ellenberg | 1d53f09 | 2010-09-05 01:13:24 +0200 | [diff] [blame] | 1187 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1188 | |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1189 | di = peer_req->digest; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1190 | |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1191 | if (likely((peer_req->flags & EE_WAS_ERROR) == 0)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1192 | /* quick hack to try to avoid a race against reconfiguration. |
| 1193 | * a real fix would be much more involved, |
| 1194 | * introducing more locking mechanisms */ |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1195 | if (peer_device->connection->csums_tfm) { |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 1196 | digest_size = crypto_shash_digestsize(peer_device->connection->csums_tfm); |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 1197 | D_ASSERT(device, digest_size == di->digest_size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1198 | digest = kmalloc(digest_size, GFP_NOIO); |
| 1199 | } |
| 1200 | if (digest) { |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1201 | drbd_csum_ee(peer_device->connection->csums_tfm, peer_req, digest); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1202 | eq = !memcmp(digest, di->digest, digest_size); |
| 1203 | kfree(digest); |
| 1204 | } |
| 1205 | |
| 1206 | if (eq) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1207 | drbd_set_in_sync(device, peer_req->i.sector, peer_req->i.size); |
Lars Ellenberg | 676396d | 2010-03-03 02:08:22 +0100 | [diff] [blame] | 1208 | /* rs_same_csums unit is BM_BLOCK_SIZE */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1209 | device->rs_same_csum += peer_req->i.size >> BM_BLOCK_SHIFT; |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1210 | err = drbd_send_ack(peer_device, P_RS_IS_IN_SYNC, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1211 | } else { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1212 | inc_rs_pending(device); |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1213 | peer_req->block_id = ID_SYNCER; /* By setting block_id, digest pointer becomes invalid! */ |
| 1214 | peer_req->flags &= ~EE_HAS_DIGEST; /* This peer request no longer has a digest pointer */ |
Philipp Reisner | 204bba9 | 2010-08-23 16:17:13 +0200 | [diff] [blame] | 1215 | kfree(di); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1216 | err = drbd_send_block(peer_device, P_RS_DATA_REPLY, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1217 | } |
| 1218 | } else { |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1219 | err = drbd_send_ack(peer_device, P_NEG_RS_DREPLY, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1220 | if (__ratelimit(&drbd_ratelimit_state)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1221 | drbd_err(device, "Sending NegDReply. I guess it gets messy.\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1222 | } |
| 1223 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1224 | dec_unacked(device); |
| 1225 | move_to_net_ee_or_free(device, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1226 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1227 | if (unlikely(err)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1228 | drbd_err(device, "drbd_send_block/ack() failed\n"); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1229 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1230 | } |
| 1231 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1232 | int w_e_end_ov_req(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1233 | { |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 1234 | struct drbd_peer_request *peer_req = container_of(w, struct drbd_peer_request, w); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1235 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 1236 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1237 | sector_t sector = peer_req->i.sector; |
| 1238 | unsigned int size = peer_req->i.size; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1239 | int digest_size; |
| 1240 | void *digest; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1241 | int err = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1242 | |
| 1243 | if (unlikely(cancel)) |
| 1244 | goto out; |
| 1245 | |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 1246 | digest_size = crypto_shash_digestsize(peer_device->connection->verify_tfm); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1247 | digest = kmalloc(digest_size, GFP_NOIO); |
Philipp Reisner | 8f21420 | 2011-03-01 15:52:35 +0100 | [diff] [blame] | 1248 | if (!digest) { |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1249 | err = 1; /* terminate the connection in case the allocation failed */ |
Philipp Reisner | 8f21420 | 2011-03-01 15:52:35 +0100 | [diff] [blame] | 1250 | goto out; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1251 | } |
| 1252 | |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1253 | if (likely(!(peer_req->flags & EE_WAS_ERROR))) |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1254 | drbd_csum_ee(peer_device->connection->verify_tfm, peer_req, digest); |
Philipp Reisner | 8f21420 | 2011-03-01 15:52:35 +0100 | [diff] [blame] | 1255 | else |
| 1256 | memset(digest, 0, digest_size); |
| 1257 | |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 1258 | /* Free e and pages before send. |
| 1259 | * In case we block on congestion, we could otherwise run into |
| 1260 | * some distributed deadlock, if the other side blocks on |
| 1261 | * congestion as well, because our receiver blocks in |
Andreas Gruenbacher | c37c8ec | 2011-04-07 21:02:09 +0200 | [diff] [blame] | 1262 | * drbd_alloc_pages due to pp_in_use > max_buffers. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1263 | drbd_free_peer_req(device, peer_req); |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1264 | peer_req = NULL; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1265 | inc_rs_pending(device); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1266 | err = drbd_send_drequest_csum(peer_device, sector, size, digest, digest_size, P_OV_REPLY); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1267 | if (err) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1268 | dec_rs_pending(device); |
Philipp Reisner | 8f21420 | 2011-03-01 15:52:35 +0100 | [diff] [blame] | 1269 | kfree(digest); |
| 1270 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1271 | out: |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1272 | if (peer_req) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1273 | drbd_free_peer_req(device, peer_req); |
| 1274 | dec_unacked(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1275 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1276 | } |
| 1277 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1278 | void drbd_ov_out_of_sync_found(struct drbd_device *device, sector_t sector, int size) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1279 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1280 | if (device->ov_last_oos_start + device->ov_last_oos_size == sector) { |
| 1281 | device->ov_last_oos_size += size>>9; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1282 | } else { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1283 | device->ov_last_oos_start = sector; |
| 1284 | device->ov_last_oos_size = size>>9; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1285 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1286 | drbd_set_out_of_sync(device, sector, size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1287 | } |
| 1288 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1289 | int w_e_end_ov_reply(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1290 | { |
Andreas Gruenbacher | a8cd15b | 2011-08-25 15:49:40 +0200 | [diff] [blame] | 1291 | struct drbd_peer_request *peer_req = container_of(w, struct drbd_peer_request, w); |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1292 | struct drbd_peer_device *peer_device = peer_req->peer_device; |
| 1293 | struct drbd_device *device = peer_device->device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1294 | struct digest_info *di; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1295 | void *digest; |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1296 | sector_t sector = peer_req->i.sector; |
| 1297 | unsigned int size = peer_req->i.size; |
Lars Ellenberg | 53ea433 | 2011-03-08 17:11:40 +0100 | [diff] [blame] | 1298 | int digest_size; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1299 | int err, eq = 0; |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 1300 | bool stop_sector_reached = false; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1301 | |
| 1302 | if (unlikely(cancel)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1303 | drbd_free_peer_req(device, peer_req); |
| 1304 | dec_unacked(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1305 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1306 | } |
| 1307 | |
| 1308 | /* after "cancel", because after drbd_disconnect/drbd_rs_cancel_all |
| 1309 | * the resync lru has been cleaned up already */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1310 | if (get_ldev(device)) { |
| 1311 | drbd_rs_complete_io(device, peer_req->i.sector); |
| 1312 | put_ldev(device); |
Lars Ellenberg | 1d53f09 | 2010-09-05 01:13:24 +0200 | [diff] [blame] | 1313 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1314 | |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1315 | di = peer_req->digest; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1316 | |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1317 | if (likely((peer_req->flags & EE_WAS_ERROR) == 0)) { |
Kees Cook | 3d0e637 | 2018-08-06 16:32:16 -0700 | [diff] [blame] | 1318 | digest_size = crypto_shash_digestsize(peer_device->connection->verify_tfm); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1319 | digest = kmalloc(digest_size, GFP_NOIO); |
| 1320 | if (digest) { |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1321 | drbd_csum_ee(peer_device->connection->verify_tfm, peer_req, digest); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1322 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 1323 | D_ASSERT(device, digest_size == di->digest_size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1324 | eq = !memcmp(digest, di->digest, digest_size); |
| 1325 | kfree(digest); |
| 1326 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1327 | } |
| 1328 | |
Lars Ellenberg | 9676c76 | 2011-02-22 14:02:31 +0100 | [diff] [blame] | 1329 | /* Free peer_req and pages before send. |
| 1330 | * In case we block on congestion, we could otherwise run into |
| 1331 | * some distributed deadlock, if the other side blocks on |
| 1332 | * congestion as well, because our receiver blocks in |
Andreas Gruenbacher | c37c8ec | 2011-04-07 21:02:09 +0200 | [diff] [blame] | 1333 | * drbd_alloc_pages due to pp_in_use > max_buffers. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1334 | drbd_free_peer_req(device, peer_req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1335 | if (!eq) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1336 | drbd_ov_out_of_sync_found(device, sector, size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1337 | else |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1338 | ov_out_of_sync_print(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1339 | |
Andreas Gruenbacher | 6780139 | 2011-09-13 10:39:41 +0200 | [diff] [blame] | 1340 | err = drbd_send_ack_ex(peer_device, P_OV_RESULT, sector, size, |
Andreas Gruenbacher | fa79abd | 2011-03-16 01:31:39 +0100 | [diff] [blame] | 1341 | eq ? ID_IN_SYNC : ID_OUT_OF_SYNC); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1342 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1343 | dec_unacked(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1344 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1345 | --device->ov_left; |
Lars Ellenberg | ea5442a | 2010-11-05 09:48:01 +0100 | [diff] [blame] | 1346 | |
| 1347 | /* let's advance progress step marks only for every other megabyte */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1348 | if ((device->ov_left & 0x200) == 0x200) |
| 1349 | drbd_advance_rs_marks(device, device->ov_left); |
Lars Ellenberg | ea5442a | 2010-11-05 09:48:01 +0100 | [diff] [blame] | 1350 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1351 | stop_sector_reached = verify_can_do_stop_sector(device) && |
| 1352 | (sector + (size>>9)) >= device->ov_stop_sector; |
Lars Ellenberg | 58ffa58 | 2012-07-26 14:09:49 +0200 | [diff] [blame] | 1353 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1354 | if (device->ov_left == 0 || stop_sector_reached) { |
| 1355 | ov_out_of_sync_print(device); |
| 1356 | drbd_resync_finished(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1357 | } |
| 1358 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1359 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1360 | } |
| 1361 | |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1362 | /* FIXME |
| 1363 | * We need to track the number of pending barrier acks, |
| 1364 | * and to be able to wait for them. |
| 1365 | * See also comment in drbd_adm_attach before drbd_suspend_io. |
| 1366 | */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1367 | static int drbd_send_barrier(struct drbd_connection *connection) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1368 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1369 | struct p_barrier *p; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1370 | struct drbd_socket *sock; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1371 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1372 | sock = &connection->data; |
| 1373 | p = conn_prepare_command(connection, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1374 | if (!p) |
| 1375 | return -EIO; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1376 | p->barrier = connection->send.current_epoch_nr; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1377 | p->pad = 0; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1378 | connection->send.current_epoch_writes = 0; |
Lars Ellenberg | 84d34f2 | 2015-02-19 13:54:11 +0100 | [diff] [blame] | 1379 | connection->send.last_sent_barrier_jif = jiffies; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1380 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1381 | return conn_send_command(connection, sock, P_BARRIER, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1382 | } |
| 1383 | |
Lars Ellenberg | c51a0ef | 2017-08-29 10:20:32 +0200 | [diff] [blame] | 1384 | static int pd_send_unplug_remote(struct drbd_peer_device *pd) |
| 1385 | { |
| 1386 | struct drbd_socket *sock = &pd->connection->data; |
| 1387 | if (!drbd_prepare_command(pd, sock)) |
| 1388 | return -EIO; |
| 1389 | return drbd_send_command(pd, sock, P_UNPLUG_REMOTE, 0, NULL, 0); |
| 1390 | } |
| 1391 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1392 | int w_send_write_hint(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1393 | { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 1394 | struct drbd_device *device = |
| 1395 | container_of(w, struct drbd_device, unplug_work); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1396 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1397 | if (cancel) |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1398 | return 0; |
Lars Ellenberg | c51a0ef | 2017-08-29 10:20:32 +0200 | [diff] [blame] | 1399 | return pd_send_unplug_remote(first_peer_device(device)); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1400 | } |
| 1401 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1402 | static void re_init_if_first_write(struct drbd_connection *connection, unsigned int epoch) |
Lars Ellenberg | 4eb9b3c | 2012-08-20 11:05:23 +0200 | [diff] [blame] | 1403 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1404 | if (!connection->send.seen_any_write_yet) { |
| 1405 | connection->send.seen_any_write_yet = true; |
| 1406 | connection->send.current_epoch_nr = epoch; |
| 1407 | connection->send.current_epoch_writes = 0; |
Lars Ellenberg | 84d34f2 | 2015-02-19 13:54:11 +0100 | [diff] [blame] | 1408 | connection->send.last_sent_barrier_jif = jiffies; |
Lars Ellenberg | 4eb9b3c | 2012-08-20 11:05:23 +0200 | [diff] [blame] | 1409 | } |
| 1410 | } |
| 1411 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1412 | static void maybe_send_barrier(struct drbd_connection *connection, unsigned int epoch) |
Lars Ellenberg | 4eb9b3c | 2012-08-20 11:05:23 +0200 | [diff] [blame] | 1413 | { |
| 1414 | /* re-init if first write on this connection */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1415 | if (!connection->send.seen_any_write_yet) |
Lars Ellenberg | 4eb9b3c | 2012-08-20 11:05:23 +0200 | [diff] [blame] | 1416 | return; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1417 | if (connection->send.current_epoch_nr != epoch) { |
| 1418 | if (connection->send.current_epoch_writes) |
| 1419 | drbd_send_barrier(connection); |
| 1420 | connection->send.current_epoch_nr = epoch; |
Lars Ellenberg | 4eb9b3c | 2012-08-20 11:05:23 +0200 | [diff] [blame] | 1421 | } |
| 1422 | } |
| 1423 | |
Andreas Gruenbacher | 8f7bed7 | 2010-12-19 23:53:14 +0100 | [diff] [blame] | 1424 | int w_send_out_of_sync(struct drbd_work *w, int cancel) |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1425 | { |
| 1426 | struct drbd_request *req = container_of(w, struct drbd_request, w); |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 1427 | struct drbd_device *device = req->device; |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1428 | struct drbd_peer_device *const peer_device = first_peer_device(device); |
| 1429 | struct drbd_connection *const connection = peer_device->connection; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1430 | int err; |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1431 | |
| 1432 | if (unlikely(cancel)) { |
Andreas Gruenbacher | 8554df1 | 2011-01-25 15:37:43 +0100 | [diff] [blame] | 1433 | req_mod(req, SEND_CANCELED); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1434 | return 0; |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1435 | } |
Lars Ellenberg | e5f891b | 2013-11-22 12:32:01 +0100 | [diff] [blame] | 1436 | req->pre_send_jif = jiffies; |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1437 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1438 | /* this time, no connection->send.current_epoch_writes++; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1439 | * If it was sent, it was the closing barrier for the last |
| 1440 | * replicated epoch, before we went into AHEAD mode. |
| 1441 | * No more barriers will be sent, until we leave AHEAD mode again. */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1442 | maybe_send_barrier(connection, req->epoch); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1443 | |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1444 | err = drbd_send_out_of_sync(peer_device, req); |
Andreas Gruenbacher | 8554df1 | 2011-01-25 15:37:43 +0100 | [diff] [blame] | 1445 | req_mod(req, OOS_HANDED_TO_NETWORK); |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1446 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1447 | return err; |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1448 | } |
| 1449 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1450 | /** |
| 1451 | * w_send_dblock() - Worker callback to send a P_DATA packet in order to mirror a write request |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1452 | * @w: work object. |
| 1453 | * @cancel: The connection will be closed anyways |
| 1454 | */ |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1455 | int w_send_dblock(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1456 | { |
| 1457 | struct drbd_request *req = container_of(w, struct drbd_request, w); |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 1458 | struct drbd_device *device = req->device; |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1459 | struct drbd_peer_device *const peer_device = first_peer_device(device); |
| 1460 | struct drbd_connection *connection = peer_device->connection; |
Lars Ellenberg | c51a0ef | 2017-08-29 10:20:32 +0200 | [diff] [blame] | 1461 | bool do_send_unplug = req->rq_state & RQ_UNPLUG; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1462 | int err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1463 | |
| 1464 | if (unlikely(cancel)) { |
Andreas Gruenbacher | 8554df1 | 2011-01-25 15:37:43 +0100 | [diff] [blame] | 1465 | req_mod(req, SEND_CANCELED); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1466 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1467 | } |
Lars Ellenberg | e5f891b | 2013-11-22 12:32:01 +0100 | [diff] [blame] | 1468 | req->pre_send_jif = jiffies; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1469 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1470 | re_init_if_first_write(connection, req->epoch); |
| 1471 | maybe_send_barrier(connection, req->epoch); |
| 1472 | connection->send.current_epoch_writes++; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1473 | |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1474 | err = drbd_send_dblock(peer_device, req); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1475 | req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1476 | |
Lars Ellenberg | c51a0ef | 2017-08-29 10:20:32 +0200 | [diff] [blame] | 1477 | if (do_send_unplug && !err) |
| 1478 | pd_send_unplug_remote(peer_device); |
| 1479 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1480 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1481 | } |
| 1482 | |
| 1483 | /** |
| 1484 | * w_send_read_req() - Worker callback to send a read request (P_DATA_REQUEST) packet |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1485 | * @w: work object. |
| 1486 | * @cancel: The connection will be closed anyways |
| 1487 | */ |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1488 | int w_send_read_req(struct drbd_work *w, int cancel) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1489 | { |
| 1490 | struct drbd_request *req = container_of(w, struct drbd_request, w); |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 1491 | struct drbd_device *device = req->device; |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1492 | struct drbd_peer_device *const peer_device = first_peer_device(device); |
| 1493 | struct drbd_connection *connection = peer_device->connection; |
Lars Ellenberg | c51a0ef | 2017-08-29 10:20:32 +0200 | [diff] [blame] | 1494 | bool do_send_unplug = req->rq_state & RQ_UNPLUG; |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1495 | int err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1496 | |
| 1497 | if (unlikely(cancel)) { |
Andreas Gruenbacher | 8554df1 | 2011-01-25 15:37:43 +0100 | [diff] [blame] | 1498 | req_mod(req, SEND_CANCELED); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1499 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1500 | } |
Lars Ellenberg | e5f891b | 2013-11-22 12:32:01 +0100 | [diff] [blame] | 1501 | req->pre_send_jif = jiffies; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1502 | |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1503 | /* Even read requests may close a write epoch, |
| 1504 | * if there was any yet. */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1505 | maybe_send_barrier(connection, req->epoch); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 1506 | |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1507 | err = drbd_send_drequest(peer_device, P_DATA_REQUEST, req->i.sector, req->i.size, |
Andreas Gruenbacher | 6c1005e | 2011-03-16 01:34:24 +0100 | [diff] [blame] | 1508 | (unsigned long)req); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1509 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1510 | req_mod(req, err ? SEND_FAILED : HANDED_OVER_TO_NETWORK); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1511 | |
Lars Ellenberg | c51a0ef | 2017-08-29 10:20:32 +0200 | [diff] [blame] | 1512 | if (do_send_unplug && !err) |
| 1513 | pd_send_unplug_remote(peer_device); |
| 1514 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1515 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1516 | } |
| 1517 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1518 | int w_restart_disk_io(struct drbd_work *w, int cancel) |
Philipp Reisner | 265be2d | 2010-05-31 10:14:17 +0200 | [diff] [blame] | 1519 | { |
| 1520 | struct drbd_request *req = container_of(w, struct drbd_request, w); |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 1521 | struct drbd_device *device = req->device; |
Philipp Reisner | 265be2d | 2010-05-31 10:14:17 +0200 | [diff] [blame] | 1522 | |
Philipp Reisner | 0778286 | 2010-08-31 12:00:50 +0200 | [diff] [blame] | 1523 | if (bio_data_dir(req->master_bio) == WRITE && req->rq_state & RQ_IN_ACT_LOG) |
Lars Ellenberg | 4dd726f | 2014-02-11 11:15:36 +0100 | [diff] [blame] | 1524 | drbd_al_begin_io(device, &req->i); |
Philipp Reisner | 265be2d | 2010-05-31 10:14:17 +0200 | [diff] [blame] | 1525 | |
Christoph Hellwig | ae7153f | 2021-01-26 15:52:40 +0100 | [diff] [blame] | 1526 | req->private_bio = bio_clone_fast(req->master_bio, GFP_NOIO, |
| 1527 | &drbd_io_bio_set); |
Christoph Hellwig | 74d4699 | 2017-08-23 19:10:32 +0200 | [diff] [blame] | 1528 | bio_set_dev(req->private_bio, device->ldev->backing_bdev); |
Christoph Hellwig | ae7153f | 2021-01-26 15:52:40 +0100 | [diff] [blame] | 1529 | req->private_bio->bi_private = req; |
| 1530 | req->private_bio->bi_end_io = drbd_request_endio; |
Christoph Hellwig | ed00aab | 2020-07-01 10:59:44 +0200 | [diff] [blame] | 1531 | submit_bio_noacct(req->private_bio); |
Philipp Reisner | 265be2d | 2010-05-31 10:14:17 +0200 | [diff] [blame] | 1532 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 1533 | return 0; |
Philipp Reisner | 265be2d | 2010-05-31 10:14:17 +0200 | [diff] [blame] | 1534 | } |
| 1535 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1536 | static int _drbd_may_sync_now(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1537 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1538 | struct drbd_device *odev = device; |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1539 | int resync_after; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1540 | |
| 1541 | while (1) { |
Lars Ellenberg | a3f8f7d | 2013-03-27 14:08:43 +0100 | [diff] [blame] | 1542 | if (!odev->ldev || odev->state.disk == D_DISKLESS) |
Philipp Reisner | 438c837 | 2011-03-28 14:48:01 +0200 | [diff] [blame] | 1543 | return 1; |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 1544 | rcu_read_lock(); |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1545 | resync_after = rcu_dereference(odev->ldev->disk_conf)->resync_after; |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 1546 | rcu_read_unlock(); |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1547 | if (resync_after == -1) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1548 | return 1; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1549 | odev = minor_to_device(resync_after); |
Lars Ellenberg | a3f8f7d | 2013-03-27 14:08:43 +0100 | [diff] [blame] | 1550 | if (!odev) |
Andreas Gruenbacher | 841ce24 | 2010-12-15 19:31:20 +0100 | [diff] [blame] | 1551 | return 1; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1552 | if ((odev->state.conn >= C_SYNC_SOURCE && |
| 1553 | odev->state.conn <= C_PAUSED_SYNC_T) || |
| 1554 | odev->state.aftr_isp || odev->state.peer_isp || |
| 1555 | odev->state.user_isp) |
| 1556 | return 0; |
| 1557 | } |
| 1558 | } |
| 1559 | |
| 1560 | /** |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1561 | * drbd_pause_after() - Pause resync on all devices that may not resync now |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1562 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1563 | * |
| 1564 | * Called from process context only (admin command and after_state_ch). |
| 1565 | */ |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1566 | static bool drbd_pause_after(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1567 | { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1568 | bool changed = false; |
Andreas Gruenbacher | 5476169 | 2011-05-30 16:15:21 +0200 | [diff] [blame] | 1569 | struct drbd_device *odev; |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1570 | int i; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1571 | |
Philipp Reisner | 695d08f | 2011-04-11 22:53:32 -0700 | [diff] [blame] | 1572 | rcu_read_lock(); |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 1573 | idr_for_each_entry(&drbd_devices, odev, i) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1574 | if (odev->state.conn == C_STANDALONE && odev->state.disk == D_DISKLESS) |
| 1575 | continue; |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1576 | if (!_drbd_may_sync_now(odev) && |
| 1577 | _drbd_set_state(_NS(odev, aftr_isp, 1), |
| 1578 | CS_HARD, NULL) != SS_NOTHING_TO_DO) |
| 1579 | changed = true; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1580 | } |
Philipp Reisner | 695d08f | 2011-04-11 22:53:32 -0700 | [diff] [blame] | 1581 | rcu_read_unlock(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1582 | |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1583 | return changed; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1584 | } |
| 1585 | |
| 1586 | /** |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1587 | * drbd_resume_next() - Resume resync on all devices that may resync now |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1588 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1589 | * |
| 1590 | * Called from process context only (admin command and worker). |
| 1591 | */ |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1592 | static bool drbd_resume_next(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1593 | { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1594 | bool changed = false; |
Andreas Gruenbacher | 5476169 | 2011-05-30 16:15:21 +0200 | [diff] [blame] | 1595 | struct drbd_device *odev; |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1596 | int i; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1597 | |
Philipp Reisner | 695d08f | 2011-04-11 22:53:32 -0700 | [diff] [blame] | 1598 | rcu_read_lock(); |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 1599 | idr_for_each_entry(&drbd_devices, odev, i) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1600 | if (odev->state.conn == C_STANDALONE && odev->state.disk == D_DISKLESS) |
| 1601 | continue; |
| 1602 | if (odev->state.aftr_isp) { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1603 | if (_drbd_may_sync_now(odev) && |
| 1604 | _drbd_set_state(_NS(odev, aftr_isp, 0), |
| 1605 | CS_HARD, NULL) != SS_NOTHING_TO_DO) |
| 1606 | changed = true; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1607 | } |
| 1608 | } |
Philipp Reisner | 695d08f | 2011-04-11 22:53:32 -0700 | [diff] [blame] | 1609 | rcu_read_unlock(); |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1610 | return changed; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1611 | } |
| 1612 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1613 | void resume_next_sg(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1614 | { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1615 | lock_all_resources(); |
| 1616 | drbd_resume_next(device); |
| 1617 | unlock_all_resources(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1618 | } |
| 1619 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1620 | void suspend_other_sg(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1621 | { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1622 | lock_all_resources(); |
| 1623 | drbd_pause_after(device); |
| 1624 | unlock_all_resources(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1625 | } |
| 1626 | |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1627 | /* caller must lock_all_resources() */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1628 | enum drbd_ret_code drbd_resync_after_valid(struct drbd_device *device, int o_minor) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1629 | { |
Andreas Gruenbacher | 5476169 | 2011-05-30 16:15:21 +0200 | [diff] [blame] | 1630 | struct drbd_device *odev; |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1631 | int resync_after; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1632 | |
| 1633 | if (o_minor == -1) |
| 1634 | return NO_ERROR; |
Lars Ellenberg | a3f8f7d | 2013-03-27 14:08:43 +0100 | [diff] [blame] | 1635 | if (o_minor < -1 || o_minor > MINORMASK) |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1636 | return ERR_RESYNC_AFTER; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1637 | |
| 1638 | /* check for loops */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1639 | odev = minor_to_device(o_minor); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1640 | while (1) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1641 | if (odev == device) |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1642 | return ERR_RESYNC_AFTER_CYCLE; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1643 | |
Lars Ellenberg | a3f8f7d | 2013-03-27 14:08:43 +0100 | [diff] [blame] | 1644 | /* You are free to depend on diskless, non-existing, |
| 1645 | * or not yet/no longer existing minors. |
| 1646 | * We only reject dependency loops. |
| 1647 | * We cannot follow the dependency chain beyond a detached or |
| 1648 | * missing minor. |
| 1649 | */ |
| 1650 | if (!odev || !odev->ldev || odev->state.disk == D_DISKLESS) |
| 1651 | return NO_ERROR; |
| 1652 | |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 1653 | rcu_read_lock(); |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1654 | resync_after = rcu_dereference(odev->ldev->disk_conf)->resync_after; |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 1655 | rcu_read_unlock(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1656 | /* dependency chain ends here, no cycles. */ |
Andreas Gruenbacher | 95f8efd | 2011-05-12 11:15:34 +0200 | [diff] [blame] | 1657 | if (resync_after == -1) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1658 | return NO_ERROR; |
| 1659 | |
| 1660 | /* follow the dependency chain */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1661 | odev = minor_to_device(resync_after); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1662 | } |
| 1663 | } |
| 1664 | |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1665 | /* caller must lock_all_resources() */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1666 | void drbd_resync_after_changed(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1667 | { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1668 | int changed; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1669 | |
Philipp Reisner | dc97b70 | 2011-05-03 14:27:15 +0200 | [diff] [blame] | 1670 | do { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1671 | changed = drbd_pause_after(device); |
| 1672 | changed |= drbd_resume_next(device); |
| 1673 | } while (changed); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1674 | } |
| 1675 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1676 | void drbd_rs_controller_reset(struct drbd_device *device) |
Lars Ellenberg | 9bd28d3 | 2010-11-05 09:55:18 +0100 | [diff] [blame] | 1677 | { |
Christoph Hellwig | 8c40c7c | 2020-09-03 07:41:00 +0200 | [diff] [blame] | 1678 | struct gendisk *disk = device->ldev->backing_bdev->bd_disk; |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 1679 | struct fifo_buffer *plan; |
| 1680 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1681 | atomic_set(&device->rs_sect_in, 0); |
| 1682 | atomic_set(&device->rs_sect_ev, 0); |
| 1683 | device->rs_in_flight = 0; |
Christoph Hellwig | cb8432d | 2020-11-26 18:47:17 +0100 | [diff] [blame] | 1684 | device->rs_last_events = |
Christoph Hellwig | 8446fe9 | 2020-11-24 09:36:54 +0100 | [diff] [blame] | 1685 | (int)part_stat_read_accum(disk->part0, sectors); |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 1686 | |
| 1687 | /* Updating the RCU protected object in place is necessary since |
| 1688 | this function gets called from atomic context. |
| 1689 | It is valid since all other updates also lead to an completely |
| 1690 | empty fifo */ |
| 1691 | rcu_read_lock(); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1692 | plan = rcu_dereference(device->rs_plan_s); |
Philipp Reisner | 813472c | 2011-05-03 16:47:02 +0200 | [diff] [blame] | 1693 | plan->total = 0; |
| 1694 | fifo_set(plan, 0); |
| 1695 | rcu_read_unlock(); |
Lars Ellenberg | 9bd28d3 | 2010-11-05 09:55:18 +0100 | [diff] [blame] | 1696 | } |
| 1697 | |
Kees Cook | 2bccef3 | 2017-10-17 20:33:01 -0700 | [diff] [blame] | 1698 | void start_resync_timer_fn(struct timer_list *t) |
Philipp Reisner | 1f04af3 | 2011-02-07 11:33:59 +0100 | [diff] [blame] | 1699 | { |
Kees Cook | 2bccef3 | 2017-10-17 20:33:01 -0700 | [diff] [blame] | 1700 | struct drbd_device *device = from_timer(device, t, start_resync_timer); |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 1701 | drbd_device_post_work(device, RS_START); |
Philipp Reisner | 1f04af3 | 2011-02-07 11:33:59 +0100 | [diff] [blame] | 1702 | } |
| 1703 | |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 1704 | static void do_start_resync(struct drbd_device *device) |
Philipp Reisner | 1f04af3 | 2011-02-07 11:33:59 +0100 | [diff] [blame] | 1705 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1706 | if (atomic_read(&device->unacked_cnt) || atomic_read(&device->rs_pending_cnt)) { |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 1707 | drbd_warn(device, "postponing start_resync ...\n"); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1708 | device->start_resync_timer.expires = jiffies + HZ/10; |
| 1709 | add_timer(&device->start_resync_timer); |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 1710 | return; |
Philipp Reisner | 1f04af3 | 2011-02-07 11:33:59 +0100 | [diff] [blame] | 1711 | } |
| 1712 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1713 | drbd_start_resync(device, C_SYNC_SOURCE); |
| 1714 | clear_bit(AHEAD_TO_SYNC_SOURCE, &device->flags); |
Philipp Reisner | 1f04af3 | 2011-02-07 11:33:59 +0100 | [diff] [blame] | 1715 | } |
| 1716 | |
Lars Ellenberg | aaaba34 | 2014-03-18 12:30:09 +0100 | [diff] [blame] | 1717 | static bool use_checksum_based_resync(struct drbd_connection *connection, struct drbd_device *device) |
| 1718 | { |
| 1719 | bool csums_after_crash_only; |
| 1720 | rcu_read_lock(); |
| 1721 | csums_after_crash_only = rcu_dereference(connection->net_conf)->csums_after_crash_only; |
| 1722 | rcu_read_unlock(); |
| 1723 | return connection->agreed_pro_version >= 89 && /* supported? */ |
| 1724 | connection->csums_tfm && /* configured? */ |
Fabian Frederick | 7e5fec3 | 2016-06-14 00:26:35 +0200 | [diff] [blame] | 1725 | (csums_after_crash_only == false /* use for each resync? */ |
Lars Ellenberg | aaaba34 | 2014-03-18 12:30:09 +0100 | [diff] [blame] | 1726 | || test_bit(CRASHED_PRIMARY, &device->flags)); /* or only after Primary crash? */ |
| 1727 | } |
| 1728 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1729 | /** |
| 1730 | * drbd_start_resync() - Start the resync process |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1731 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1732 | * @side: Either C_SYNC_SOURCE or C_SYNC_TARGET |
| 1733 | * |
| 1734 | * This function might bring you directly into one of the |
| 1735 | * C_PAUSED_SYNC_* states. |
| 1736 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1737 | void drbd_start_resync(struct drbd_device *device, enum drbd_conns side) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1738 | { |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1739 | struct drbd_peer_device *peer_device = first_peer_device(device); |
| 1740 | struct drbd_connection *connection = peer_device ? peer_device->connection : NULL; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1741 | union drbd_state ns; |
| 1742 | int r; |
| 1743 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1744 | if (device->state.conn >= C_SYNC_SOURCE && device->state.conn < C_AHEAD) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1745 | drbd_err(device, "Resync already running!\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1746 | return; |
| 1747 | } |
| 1748 | |
Roland Kammerer | d3d2948 | 2017-08-29 10:20:47 +0200 | [diff] [blame] | 1749 | if (!connection) { |
| 1750 | drbd_err(device, "No connection to peer, aborting!\n"); |
| 1751 | return; |
| 1752 | } |
| 1753 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1754 | if (!test_bit(B_RS_H_DONE, &device->flags)) { |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1755 | if (side == C_SYNC_TARGET) { |
| 1756 | /* Since application IO was locked out during C_WF_BITMAP_T and |
| 1757 | C_WF_SYNC_UUID we are still unmodified. Before going to C_SYNC_TARGET |
| 1758 | we check that we might make the data inconsistent. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1759 | r = drbd_khelper(device, "before-resync-target"); |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1760 | r = (r >> 8) & 0xff; |
| 1761 | if (r > 0) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1762 | drbd_info(device, "before-resync-target handler returned %d, " |
Philipp Reisner | 09b9e79 | 2010-12-03 16:04:24 +0100 | [diff] [blame] | 1763 | "dropping connection.\n", r); |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1764 | conn_request_state(connection, NS(conn, C_DISCONNECTING), CS_HARD); |
Philipp Reisner | 09b9e79 | 2010-12-03 16:04:24 +0100 | [diff] [blame] | 1765 | return; |
| 1766 | } |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1767 | } else /* C_SYNC_SOURCE */ { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1768 | r = drbd_khelper(device, "before-resync-source"); |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1769 | r = (r >> 8) & 0xff; |
| 1770 | if (r > 0) { |
| 1771 | if (r == 3) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1772 | drbd_info(device, "before-resync-source handler returned %d, " |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1773 | "ignoring. Old userland tools?", r); |
| 1774 | } else { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1775 | drbd_info(device, "before-resync-source handler returned %d, " |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1776 | "dropping connection.\n", r); |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1777 | conn_request_state(connection, |
Andreas Gruenbacher | a6b32bc3 | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1778 | NS(conn, C_DISCONNECTING), CS_HARD); |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1779 | return; |
| 1780 | } |
| 1781 | } |
Philipp Reisner | 09b9e79 | 2010-12-03 16:04:24 +0100 | [diff] [blame] | 1782 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1783 | } |
| 1784 | |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1785 | if (current == connection->worker.task) { |
Philipp Reisner | dad2055 | 2011-02-11 19:43:55 +0100 | [diff] [blame] | 1786 | /* The worker should not sleep waiting for state_mutex, |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1787 | that can take long */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1788 | if (!mutex_trylock(device->state_mutex)) { |
| 1789 | set_bit(B_RS_H_DONE, &device->flags); |
| 1790 | device->start_resync_timer.expires = jiffies + HZ/5; |
| 1791 | add_timer(&device->start_resync_timer); |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1792 | return; |
| 1793 | } |
| 1794 | } else { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1795 | mutex_lock(device->state_mutex); |
Philipp Reisner | e64a329 | 2011-02-05 17:34:11 +0100 | [diff] [blame] | 1796 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1797 | |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1798 | lock_all_resources(); |
| 1799 | clear_bit(B_RS_H_DONE, &device->flags); |
Philipp Reisner | a700471 | 2013-03-27 14:08:35 +0100 | [diff] [blame] | 1800 | /* Did some connection breakage or IO error race with us? */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1801 | if (device->state.conn < C_CONNECTED |
| 1802 | || !get_ldev_if_state(device, D_NEGOTIATING)) { |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1803 | unlock_all_resources(); |
| 1804 | goto out; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1805 | } |
| 1806 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1807 | ns = drbd_read_state(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1808 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1809 | ns.aftr_isp = !_drbd_may_sync_now(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1810 | |
| 1811 | ns.conn = side; |
| 1812 | |
| 1813 | if (side == C_SYNC_TARGET) |
| 1814 | ns.disk = D_INCONSISTENT; |
| 1815 | else /* side == C_SYNC_SOURCE */ |
| 1816 | ns.pdsk = D_INCONSISTENT; |
| 1817 | |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1818 | r = _drbd_set_state(device, ns, CS_VERBOSE, NULL); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1819 | ns = drbd_read_state(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1820 | |
| 1821 | if (ns.conn < C_CONNECTED) |
| 1822 | r = SS_UNKNOWN_ERROR; |
| 1823 | |
| 1824 | if (r == SS_SUCCESS) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1825 | unsigned long tw = drbd_bm_total_weight(device); |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 1826 | unsigned long now = jiffies; |
| 1827 | int i; |
| 1828 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1829 | device->rs_failed = 0; |
| 1830 | device->rs_paused = 0; |
| 1831 | device->rs_same_csum = 0; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1832 | device->rs_last_sect_ev = 0; |
| 1833 | device->rs_total = tw; |
| 1834 | device->rs_start = now; |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 1835 | for (i = 0; i < DRBD_SYNC_MARKS; i++) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1836 | device->rs_mark_left[i] = tw; |
| 1837 | device->rs_mark_time[i] = now; |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 1838 | } |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1839 | drbd_pause_after(device); |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 1840 | /* Forget potentially stale cached per resync extent bit-counts. |
| 1841 | * Open coded drbd_rs_cancel_all(device), we already have IRQs |
| 1842 | * disabled, and know the disk state is ok. */ |
| 1843 | spin_lock(&device->al_lock); |
| 1844 | lc_reset(device->resync); |
| 1845 | device->resync_locked = 0; |
| 1846 | device->resync_wenr = LC_FREE; |
| 1847 | spin_unlock(&device->al_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1848 | } |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1849 | unlock_all_resources(); |
Lars Ellenberg | 5a22db8 | 2010-12-17 21:14:23 +0100 | [diff] [blame] | 1850 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1851 | if (r == SS_SUCCESS) { |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 1852 | wake_up(&device->al_wait); /* for lc_reset() above */ |
Philipp Reisner | 328e0f1 | 2012-10-19 14:37:47 +0200 | [diff] [blame] | 1853 | /* reset rs_last_bcast when a resync or verify is started, |
| 1854 | * to deal with potential jiffies wrap. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1855 | device->rs_last_bcast = jiffies - HZ; |
Philipp Reisner | 328e0f1 | 2012-10-19 14:37:47 +0200 | [diff] [blame] | 1856 | |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1857 | drbd_info(device, "Began resync as %s (will sync %lu KB [%lu bits set]).\n", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1858 | drbd_conn_str(ns.conn), |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1859 | (unsigned long) device->rs_total << (BM_BLOCK_SHIFT-10), |
| 1860 | (unsigned long) device->rs_total); |
Lars Ellenberg | aaaba34 | 2014-03-18 12:30:09 +0100 | [diff] [blame] | 1861 | if (side == C_SYNC_TARGET) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1862 | device->bm_resync_fo = 0; |
Lars Ellenberg | aaaba34 | 2014-03-18 12:30:09 +0100 | [diff] [blame] | 1863 | device->use_csums = use_checksum_based_resync(connection, device); |
| 1864 | } else { |
Fabian Frederick | 7e5fec3 | 2016-06-14 00:26:35 +0200 | [diff] [blame] | 1865 | device->use_csums = false; |
Lars Ellenberg | aaaba34 | 2014-03-18 12:30:09 +0100 | [diff] [blame] | 1866 | } |
Lars Ellenberg | 6c922ed | 2011-01-12 11:51:13 +0100 | [diff] [blame] | 1867 | |
| 1868 | /* Since protocol 96, we must serialize drbd_gen_and_send_sync_uuid |
| 1869 | * with w_send_oos, or the sync target will get confused as to |
| 1870 | * how much bits to resync. We cannot do that always, because for an |
| 1871 | * empty resync and protocol < 95, we need to do it here, as we call |
| 1872 | * drbd_resync_finished from here in that case. |
| 1873 | * We drbd_gen_and_send_sync_uuid here for protocol < 96, |
| 1874 | * and from after_state_ch otherwise. */ |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1875 | if (side == C_SYNC_SOURCE && connection->agreed_pro_version < 96) |
| 1876 | drbd_gen_and_send_sync_uuid(peer_device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1877 | |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1878 | if (connection->agreed_pro_version < 95 && device->rs_total == 0) { |
Lars Ellenberg | af85e8e | 2010-10-07 16:07:55 +0200 | [diff] [blame] | 1879 | /* This still has a race (about when exactly the peers |
| 1880 | * detect connection loss) that can lead to a full sync |
| 1881 | * on next handshake. In 8.3.9 we fixed this with explicit |
| 1882 | * resync-finished notifications, but the fix |
| 1883 | * introduces a protocol change. Sleeping for some |
| 1884 | * time longer than the ping interval + timeout on the |
| 1885 | * SyncSource, to give the SyncTarget the chance to |
| 1886 | * detect connection loss, then waiting for a ping |
| 1887 | * response (implicit in drbd_resync_finished) reduces |
| 1888 | * the race considerably, but does not solve it. */ |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1889 | if (side == C_SYNC_SOURCE) { |
| 1890 | struct net_conf *nc; |
| 1891 | int timeo; |
| 1892 | |
| 1893 | rcu_read_lock(); |
Lars Ellenberg | 44a4d55 | 2013-11-22 12:40:58 +0100 | [diff] [blame] | 1894 | nc = rcu_dereference(connection->net_conf); |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1895 | timeo = nc->ping_int * HZ + nc->ping_timeo * HZ / 9; |
| 1896 | rcu_read_unlock(); |
| 1897 | schedule_timeout_interruptible(timeo); |
| 1898 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1899 | drbd_resync_finished(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1900 | } |
| 1901 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1902 | drbd_rs_controller_reset(device); |
| 1903 | /* ns.conn may already be != device->state.conn, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1904 | * we may have been paused in between, or become paused until |
| 1905 | * the timer triggers. |
| 1906 | * No matter, that is handled in resync_timer_fn() */ |
| 1907 | if (ns.conn == C_SYNC_TARGET) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1908 | mod_timer(&device->resync_timer, jiffies); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1909 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1910 | drbd_md_sync(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1911 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1912 | put_ldev(device); |
Andreas Gruenbacher | 28bc3b8 | 2014-08-14 18:33:30 +0200 | [diff] [blame] | 1913 | out: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1914 | mutex_unlock(device->state_mutex); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1915 | } |
| 1916 | |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 1917 | static void update_on_disk_bitmap(struct drbd_device *device, bool resync_done) |
Lars Ellenberg | c7a58db | 2013-12-20 11:39:48 +0100 | [diff] [blame] | 1918 | { |
| 1919 | struct sib_info sib = { .sib_reason = SIB_SYNC_PROGRESS, }; |
| 1920 | device->rs_last_bcast = jiffies; |
| 1921 | |
| 1922 | if (!get_ldev(device)) |
| 1923 | return; |
| 1924 | |
| 1925 | drbd_bm_write_lazy(device, 0); |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 1926 | if (resync_done && is_sync_state(device->state.conn)) |
Lars Ellenberg | c7a58db | 2013-12-20 11:39:48 +0100 | [diff] [blame] | 1927 | drbd_resync_finished(device); |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 1928 | |
Lars Ellenberg | c7a58db | 2013-12-20 11:39:48 +0100 | [diff] [blame] | 1929 | drbd_bcast_event(device, &sib); |
| 1930 | /* update timestamp, in case it took a while to write out stuff */ |
| 1931 | device->rs_last_bcast = jiffies; |
| 1932 | put_ldev(device); |
| 1933 | } |
| 1934 | |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 1935 | static void drbd_ldev_destroy(struct drbd_device *device) |
| 1936 | { |
| 1937 | lc_destroy(device->resync); |
| 1938 | device->resync = NULL; |
| 1939 | lc_destroy(device->act_log); |
| 1940 | device->act_log = NULL; |
Andreas Gruenbacher | d1b8085 | 2014-09-11 14:29:09 +0200 | [diff] [blame] | 1941 | |
| 1942 | __acquire(local); |
Lars Ellenberg | 63a7c8a | 2015-03-26 20:53:55 +0100 | [diff] [blame] | 1943 | drbd_backing_dev_free(device, device->ldev); |
Andreas Gruenbacher | d1b8085 | 2014-09-11 14:29:09 +0200 | [diff] [blame] | 1944 | device->ldev = NULL; |
| 1945 | __release(local); |
| 1946 | |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 1947 | clear_bit(GOING_DISKLESS, &device->flags); |
| 1948 | wake_up(&device->misc_wait); |
| 1949 | } |
| 1950 | |
| 1951 | static void go_diskless(struct drbd_device *device) |
| 1952 | { |
| 1953 | D_ASSERT(device, device->state.disk == D_FAILED); |
| 1954 | /* we cannot assert local_cnt == 0 here, as get_ldev_if_state will |
| 1955 | * inc/dec it frequently. Once we are D_DISKLESS, no one will touch |
| 1956 | * the protected members anymore, though, so once put_ldev reaches zero |
| 1957 | * again, it will be safe to free them. */ |
| 1958 | |
| 1959 | /* Try to write changed bitmap pages, read errors may have just |
| 1960 | * set some bits outside the area covered by the activity log. |
| 1961 | * |
| 1962 | * If we have an IO error during the bitmap writeout, |
| 1963 | * we will want a full sync next time, just in case. |
| 1964 | * (Do we want a specific meta data flag for this?) |
| 1965 | * |
| 1966 | * If that does not make it to stable storage either, |
| 1967 | * we cannot do anything about that anymore. |
| 1968 | * |
| 1969 | * We still need to check if both bitmap and ldev are present, we may |
| 1970 | * end up here after a failed attach, before ldev was even assigned. |
| 1971 | */ |
| 1972 | if (device->bitmap && device->ldev) { |
| 1973 | /* An interrupted resync or similar is allowed to recounts bits |
| 1974 | * while we detach. |
| 1975 | * Any modifications would not be expected anymore, though. |
| 1976 | */ |
| 1977 | if (drbd_bitmap_io_from_worker(device, drbd_bm_write, |
| 1978 | "detach", BM_LOCKED_TEST_ALLOWED)) { |
| 1979 | if (test_bit(WAS_READ_ERROR, &device->flags)) { |
| 1980 | drbd_md_set_flag(device, MDF_FULL_SYNC); |
| 1981 | drbd_md_sync(device); |
| 1982 | } |
| 1983 | } |
| 1984 | } |
| 1985 | |
| 1986 | drbd_force_state(device, NS(disk, D_DISKLESS)); |
| 1987 | } |
| 1988 | |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 1989 | static int do_md_sync(struct drbd_device *device) |
| 1990 | { |
| 1991 | drbd_warn(device, "md_sync_timer expired! Worker calls drbd_md_sync().\n"); |
| 1992 | drbd_md_sync(device); |
| 1993 | return 0; |
| 1994 | } |
| 1995 | |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 1996 | /* only called from drbd_worker thread, no locking */ |
| 1997 | void __update_timing_details( |
| 1998 | struct drbd_thread_timing_details *tdp, |
| 1999 | unsigned int *cb_nr, |
| 2000 | void *cb, |
| 2001 | const char *fn, const unsigned int line) |
| 2002 | { |
| 2003 | unsigned int i = *cb_nr % DRBD_THREAD_DETAILS_HIST; |
| 2004 | struct drbd_thread_timing_details *td = tdp + i; |
| 2005 | |
| 2006 | td->start_jif = jiffies; |
| 2007 | td->cb_addr = cb; |
| 2008 | td->caller_fn = fn; |
| 2009 | td->line = line; |
| 2010 | td->cb_nr = *cb_nr; |
| 2011 | |
| 2012 | i = (i+1) % DRBD_THREAD_DETAILS_HIST; |
| 2013 | td = tdp + i; |
| 2014 | memset(td, 0, sizeof(*td)); |
| 2015 | |
| 2016 | ++(*cb_nr); |
| 2017 | } |
| 2018 | |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2019 | static void do_device_work(struct drbd_device *device, const unsigned long todo) |
| 2020 | { |
Andreas Gruenbacher | b47a06d | 2014-09-11 14:29:10 +0200 | [diff] [blame] | 2021 | if (test_bit(MD_SYNC, &todo)) |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 2022 | do_md_sync(device); |
Andreas Gruenbacher | b47a06d | 2014-09-11 14:29:10 +0200 | [diff] [blame] | 2023 | if (test_bit(RS_DONE, &todo) || |
| 2024 | test_bit(RS_PROGRESS, &todo)) |
| 2025 | update_on_disk_bitmap(device, test_bit(RS_DONE, &todo)); |
| 2026 | if (test_bit(GO_DISKLESS, &todo)) |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2027 | go_diskless(device); |
Andreas Gruenbacher | b47a06d | 2014-09-11 14:29:10 +0200 | [diff] [blame] | 2028 | if (test_bit(DESTROY_DISK, &todo)) |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2029 | drbd_ldev_destroy(device); |
Andreas Gruenbacher | b47a06d | 2014-09-11 14:29:10 +0200 | [diff] [blame] | 2030 | if (test_bit(RS_START, &todo)) |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 2031 | do_start_resync(device); |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2032 | } |
| 2033 | |
| 2034 | #define DRBD_DEVICE_WORK_MASK \ |
| 2035 | ((1UL << GO_DISKLESS) \ |
| 2036 | |(1UL << DESTROY_DISK) \ |
Lars Ellenberg | ac0acb9 | 2014-02-11 09:47:58 +0100 | [diff] [blame] | 2037 | |(1UL << MD_SYNC) \ |
| 2038 | |(1UL << RS_START) \ |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2039 | |(1UL << RS_PROGRESS) \ |
| 2040 | |(1UL << RS_DONE) \ |
| 2041 | ) |
| 2042 | |
| 2043 | static unsigned long get_work_bits(unsigned long *flags) |
| 2044 | { |
| 2045 | unsigned long old, new; |
| 2046 | do { |
| 2047 | old = *flags; |
| 2048 | new = old & ~DRBD_DEVICE_WORK_MASK; |
| 2049 | } while (cmpxchg(flags, old, new) != old); |
| 2050 | return old & DRBD_DEVICE_WORK_MASK; |
| 2051 | } |
| 2052 | |
| 2053 | static void do_unqueued_work(struct drbd_connection *connection) |
Lars Ellenberg | c7a58db | 2013-12-20 11:39:48 +0100 | [diff] [blame] | 2054 | { |
| 2055 | struct drbd_peer_device *peer_device; |
| 2056 | int vnr; |
| 2057 | |
| 2058 | rcu_read_lock(); |
| 2059 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
| 2060 | struct drbd_device *device = peer_device->device; |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2061 | unsigned long todo = get_work_bits(&device->flags); |
| 2062 | if (!todo) |
Lars Ellenberg | c7a58db | 2013-12-20 11:39:48 +0100 | [diff] [blame] | 2063 | continue; |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 2064 | |
Lars Ellenberg | c7a58db | 2013-12-20 11:39:48 +0100 | [diff] [blame] | 2065 | kref_get(&device->kref); |
| 2066 | rcu_read_unlock(); |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2067 | do_device_work(device, todo); |
Lars Ellenberg | c7a58db | 2013-12-20 11:39:48 +0100 | [diff] [blame] | 2068 | kref_put(&device->kref, drbd_destroy_device); |
| 2069 | rcu_read_lock(); |
| 2070 | } |
| 2071 | rcu_read_unlock(); |
| 2072 | } |
| 2073 | |
Rashika Kheria | a186e47 | 2013-12-19 15:06:10 +0530 | [diff] [blame] | 2074 | static bool dequeue_work_batch(struct drbd_work_queue *queue, struct list_head *work_list) |
Lars Ellenberg | 8c0785a | 2011-10-19 11:50:57 +0200 | [diff] [blame] | 2075 | { |
| 2076 | spin_lock_irq(&queue->q_lock); |
Lars Ellenberg | 15e26f6a | 2014-04-28 11:43:21 +0200 | [diff] [blame] | 2077 | list_splice_tail_init(&queue->q, work_list); |
Lars Ellenberg | 8c0785a | 2011-10-19 11:50:57 +0200 | [diff] [blame] | 2078 | spin_unlock_irq(&queue->q_lock); |
| 2079 | return !list_empty(work_list); |
| 2080 | } |
| 2081 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2082 | static void wait_for_work(struct drbd_connection *connection, struct list_head *work_list) |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2083 | { |
| 2084 | DEFINE_WAIT(wait); |
| 2085 | struct net_conf *nc; |
| 2086 | int uncork, cork; |
| 2087 | |
Lars Ellenberg | abde9cc | 2014-09-11 14:29:11 +0200 | [diff] [blame] | 2088 | dequeue_work_batch(&connection->sender_work, work_list); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2089 | if (!list_empty(work_list)) |
| 2090 | return; |
| 2091 | |
| 2092 | /* Still nothing to do? |
| 2093 | * Maybe we still need to close the current epoch, |
| 2094 | * even if no new requests are queued yet. |
| 2095 | * |
| 2096 | * Also, poke TCP, just in case. |
| 2097 | * Then wait for new work (or signal). */ |
| 2098 | rcu_read_lock(); |
| 2099 | nc = rcu_dereference(connection->net_conf); |
| 2100 | uncork = nc ? nc->tcp_cork : 0; |
| 2101 | rcu_read_unlock(); |
| 2102 | if (uncork) { |
| 2103 | mutex_lock(&connection->data.mutex); |
| 2104 | if (connection->data.socket) |
Christoph Hellwig | db10538 | 2020-05-28 07:12:18 +0200 | [diff] [blame] | 2105 | tcp_sock_set_cork(connection->data.socket->sk, false); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2106 | mutex_unlock(&connection->data.mutex); |
| 2107 | } |
| 2108 | |
| 2109 | for (;;) { |
| 2110 | int send_barrier; |
| 2111 | prepare_to_wait(&connection->sender_work.q_wait, &wait, TASK_INTERRUPTIBLE); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 2112 | spin_lock_irq(&connection->resource->req_lock); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2113 | spin_lock(&connection->sender_work.q_lock); /* FIXME get rid of this one? */ |
Lars Ellenberg | bc317a9 | 2012-08-22 11:47:14 +0200 | [diff] [blame] | 2114 | if (!list_empty(&connection->sender_work.q)) |
Lars Ellenberg | 4dd726f | 2014-02-11 11:15:36 +0100 | [diff] [blame] | 2115 | list_splice_tail_init(&connection->sender_work.q, work_list); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2116 | spin_unlock(&connection->sender_work.q_lock); /* FIXME get rid of this one? */ |
| 2117 | if (!list_empty(work_list) || signal_pending(current)) { |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 2118 | spin_unlock_irq(&connection->resource->req_lock); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2119 | break; |
| 2120 | } |
Lars Ellenberg | f9c7812 | 2014-04-28 18:43:29 +0200 | [diff] [blame] | 2121 | |
| 2122 | /* We found nothing new to do, no to-be-communicated request, |
| 2123 | * no other work item. We may still need to close the last |
| 2124 | * epoch. Next incoming request epoch will be connection -> |
| 2125 | * current transfer log epoch number. If that is different |
| 2126 | * from the epoch of the last request we communicated, it is |
| 2127 | * safe to send the epoch separating barrier now. |
| 2128 | */ |
| 2129 | send_barrier = |
| 2130 | atomic_read(&connection->current_tle_nr) != |
| 2131 | connection->send.current_epoch_nr; |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 2132 | spin_unlock_irq(&connection->resource->req_lock); |
Lars Ellenberg | f9c7812 | 2014-04-28 18:43:29 +0200 | [diff] [blame] | 2133 | |
| 2134 | if (send_barrier) |
| 2135 | maybe_send_barrier(connection, |
| 2136 | connection->send.current_epoch_nr + 1); |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 2137 | |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2138 | if (test_bit(DEVICE_WORK_PENDING, &connection->flags)) |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 2139 | break; |
| 2140 | |
Lars Ellenberg | a80ca1a | 2013-12-27 17:17:25 +0100 | [diff] [blame] | 2141 | /* drbd_send() may have called flush_signals() */ |
| 2142 | if (get_t_state(&connection->worker) != RUNNING) |
| 2143 | break; |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 2144 | |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2145 | schedule(); |
| 2146 | /* may be woken up for other things but new work, too, |
| 2147 | * e.g. if the current epoch got closed. |
| 2148 | * In which case we send the barrier above. */ |
| 2149 | } |
| 2150 | finish_wait(&connection->sender_work.q_wait, &wait); |
| 2151 | |
| 2152 | /* someone may have changed the config while we have been waiting above. */ |
| 2153 | rcu_read_lock(); |
| 2154 | nc = rcu_dereference(connection->net_conf); |
| 2155 | cork = nc ? nc->tcp_cork : 0; |
| 2156 | rcu_read_unlock(); |
| 2157 | mutex_lock(&connection->data.mutex); |
| 2158 | if (connection->data.socket) { |
| 2159 | if (cork) |
Christoph Hellwig | db10538 | 2020-05-28 07:12:18 +0200 | [diff] [blame] | 2160 | tcp_sock_set_cork(connection->data.socket->sk, true); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2161 | else if (!uncork) |
Christoph Hellwig | db10538 | 2020-05-28 07:12:18 +0200 | [diff] [blame] | 2162 | tcp_sock_set_cork(connection->data.socket->sk, false); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2163 | } |
| 2164 | mutex_unlock(&connection->data.mutex); |
| 2165 | } |
| 2166 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2167 | int drbd_worker(struct drbd_thread *thi) |
| 2168 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2169 | struct drbd_connection *connection = thi->connection; |
Andreas Gruenbacher | 6db7e50 | 2011-08-26 23:50:08 +0200 | [diff] [blame] | 2170 | struct drbd_work *w = NULL; |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2171 | struct drbd_peer_device *peer_device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2172 | LIST_HEAD(work_list); |
Lars Ellenberg | 8c0785a | 2011-10-19 11:50:57 +0200 | [diff] [blame] | 2173 | int vnr; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2174 | |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 2175 | while (get_t_state(thi) == RUNNING) { |
Philipp Reisner | 8082228 | 2011-02-08 12:46:30 +0100 | [diff] [blame] | 2176 | drbd_thread_current_set_cpu(thi); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2177 | |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2178 | if (list_empty(&work_list)) { |
| 2179 | update_worker_timing_details(connection, wait_for_work); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2180 | wait_for_work(connection, &work_list); |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2181 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2182 | |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2183 | if (test_and_clear_bit(DEVICE_WORK_PENDING, &connection->flags)) { |
| 2184 | update_worker_timing_details(connection, do_unqueued_work); |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2185 | do_unqueued_work(connection); |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2186 | } |
Lars Ellenberg | 5ab7d2c | 2014-01-27 15:58:22 +0100 | [diff] [blame] | 2187 | |
Lars Ellenberg | 8c0785a | 2011-10-19 11:50:57 +0200 | [diff] [blame] | 2188 | if (signal_pending(current)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2189 | flush_signals(current); |
Philipp Reisner | 19393e1 | 2011-02-09 10:09:07 +0100 | [diff] [blame] | 2190 | if (get_t_state(thi) == RUNNING) { |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 2191 | drbd_warn(connection, "Worker got an unexpected signal\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2192 | continue; |
Philipp Reisner | 19393e1 | 2011-02-09 10:09:07 +0100 | [diff] [blame] | 2193 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2194 | break; |
| 2195 | } |
| 2196 | |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 2197 | if (get_t_state(thi) != RUNNING) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2198 | break; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2199 | |
Lars Ellenberg | 729e8b8 | 2014-09-11 14:29:12 +0200 | [diff] [blame] | 2200 | if (!list_empty(&work_list)) { |
Andreas Gruenbacher | 6db7e50 | 2011-08-26 23:50:08 +0200 | [diff] [blame] | 2201 | w = list_first_entry(&work_list, struct drbd_work, list); |
| 2202 | list_del_init(&w->list); |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2203 | update_worker_timing_details(connection, w->cb); |
Andreas Gruenbacher | 6db7e50 | 2011-08-26 23:50:08 +0200 | [diff] [blame] | 2204 | if (w->cb(w, connection->cstate < C_WF_REPORT_PARAMS) == 0) |
Lars Ellenberg | 8c0785a | 2011-10-19 11:50:57 +0200 | [diff] [blame] | 2205 | continue; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2206 | if (connection->cstate >= C_WF_REPORT_PARAMS) |
| 2207 | conn_request_state(connection, NS(conn, C_NETWORK_FAILURE), CS_HARD); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2208 | } |
| 2209 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2210 | |
Lars Ellenberg | 8c0785a | 2011-10-19 11:50:57 +0200 | [diff] [blame] | 2211 | do { |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2212 | if (test_and_clear_bit(DEVICE_WORK_PENDING, &connection->flags)) { |
| 2213 | update_worker_timing_details(connection, do_unqueued_work); |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2214 | do_unqueued_work(connection); |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2215 | } |
Lars Ellenberg | 729e8b8 | 2014-09-11 14:29:12 +0200 | [diff] [blame] | 2216 | if (!list_empty(&work_list)) { |
Andreas Gruenbacher | 6db7e50 | 2011-08-26 23:50:08 +0200 | [diff] [blame] | 2217 | w = list_first_entry(&work_list, struct drbd_work, list); |
| 2218 | list_del_init(&w->list); |
Lars Ellenberg | 944410e | 2014-05-06 15:02:05 +0200 | [diff] [blame] | 2219 | update_worker_timing_details(connection, w->cb); |
Andreas Gruenbacher | 6db7e50 | 2011-08-26 23:50:08 +0200 | [diff] [blame] | 2220 | w->cb(w, 1); |
Lars Ellenberg | 729e8b8 | 2014-09-11 14:29:12 +0200 | [diff] [blame] | 2221 | } else |
| 2222 | dequeue_work_batch(&connection->sender_work, &work_list); |
Lars Ellenberg | e334f55 | 2014-02-11 09:30:49 +0100 | [diff] [blame] | 2223 | } while (!list_empty(&work_list) || test_bit(DEVICE_WORK_PENDING, &connection->flags)); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2224 | |
Philipp Reisner | c141ebd | 2011-05-05 16:13:10 +0200 | [diff] [blame] | 2225 | rcu_read_lock(); |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2226 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
| 2227 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 2228 | D_ASSERT(device, device->state.disk == D_DISKLESS && device->state.conn == C_STANDALONE); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2229 | kref_get(&device->kref); |
Philipp Reisner | c141ebd | 2011-05-05 16:13:10 +0200 | [diff] [blame] | 2230 | rcu_read_unlock(); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2231 | drbd_device_cleanup(device); |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 2232 | kref_put(&device->kref, drbd_destroy_device); |
Philipp Reisner | c141ebd | 2011-05-05 16:13:10 +0200 | [diff] [blame] | 2233 | rcu_read_lock(); |
Philipp Reisner | 0e29d16 | 2011-02-18 14:23:11 +0100 | [diff] [blame] | 2234 | } |
Philipp Reisner | c141ebd | 2011-05-05 16:13:10 +0200 | [diff] [blame] | 2235 | rcu_read_unlock(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2236 | |
| 2237 | return 0; |
| 2238 | } |