Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1 | /* |
| 2 | drbd.c |
| 3 | |
| 4 | This file is part of DRBD by Philipp Reisner and Lars Ellenberg. |
| 5 | |
| 6 | Copyright (C) 2001-2008, LINBIT Information Technologies GmbH. |
| 7 | Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>. |
| 8 | Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>. |
| 9 | |
| 10 | Thanks to Carter Burden, Bart Grantham and Gennadiy Nerubayev |
| 11 | from Logicworks, Inc. for making SDP replication support possible. |
| 12 | |
| 13 | drbd is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 2, or (at your option) |
| 16 | any later version. |
| 17 | |
| 18 | drbd is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with drbd; see the file COPYING. If not, write to |
| 25 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 26 | |
| 27 | */ |
| 28 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 29 | #include <linux/module.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 30 | #include <linux/drbd.h> |
| 31 | #include <asm/uaccess.h> |
| 32 | #include <asm/types.h> |
| 33 | #include <net/sock.h> |
| 34 | #include <linux/ctype.h> |
Arnd Bergmann | 2a48fc0 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 35 | #include <linux/mutex.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 36 | #include <linux/fs.h> |
| 37 | #include <linux/file.h> |
| 38 | #include <linux/proc_fs.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/mm.h> |
| 41 | #include <linux/memcontrol.h> |
| 42 | #include <linux/mm_inline.h> |
| 43 | #include <linux/slab.h> |
| 44 | #include <linux/random.h> |
| 45 | #include <linux/reboot.h> |
| 46 | #include <linux/notifier.h> |
| 47 | #include <linux/kthread.h> |
Lars Ellenberg | 113fef9 | 2013-03-22 18:14:40 -0600 | [diff] [blame] | 48 | #include <linux/workqueue.h> |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 49 | #define __KERNEL_SYSCALLS__ |
| 50 | #include <linux/unistd.h> |
| 51 | #include <linux/vmalloc.h> |
| 52 | |
| 53 | #include <linux/drbd_limits.h> |
| 54 | #include "drbd_int.h" |
Andreas Gruenbacher | a3603a6 | 2011-05-30 11:47:37 +0200 | [diff] [blame] | 55 | #include "drbd_protocol.h" |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 56 | #include "drbd_req.h" /* only for _req_mod in tl_release and tl_clear */ |
| 57 | |
| 58 | #include "drbd_vli.h" |
| 59 | |
Arnd Bergmann | 2a48fc0 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 60 | static DEFINE_MUTEX(drbd_main_mutex); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 61 | static int drbd_open(struct block_device *bdev, fmode_t mode); |
Al Viro | db2a144 | 2013-05-05 21:52:57 -0400 | [diff] [blame] | 62 | static void drbd_release(struct gendisk *gd, fmode_t mode); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 63 | static int w_md_sync(struct drbd_work *w, int unused); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 64 | static void md_sync_timer_fn(unsigned long data); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 65 | static int w_bitmap_io(struct drbd_work *w, int unused); |
| 66 | static int w_go_diskless(struct drbd_work *w, int unused); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 67 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 68 | MODULE_AUTHOR("Philipp Reisner <phil@linbit.com>, " |
| 69 | "Lars Ellenberg <lars@linbit.com>"); |
| 70 | MODULE_DESCRIPTION("drbd - Distributed Replicated Block Device v" REL_VERSION); |
| 71 | MODULE_VERSION(REL_VERSION); |
| 72 | MODULE_LICENSE("GPL"); |
Philipp Reisner | 81a5d60 | 2011-02-22 19:53:16 -0500 | [diff] [blame] | 73 | MODULE_PARM_DESC(minor_count, "Approximate number of drbd devices (" |
Philipp Reisner | 2b8a90b | 2011-01-10 11:15:17 +0100 | [diff] [blame] | 74 | __stringify(DRBD_MINOR_COUNT_MIN) "-" __stringify(DRBD_MINOR_COUNT_MAX) ")"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 75 | MODULE_ALIAS_BLOCKDEV_MAJOR(DRBD_MAJOR); |
| 76 | |
| 77 | #include <linux/moduleparam.h> |
| 78 | /* allow_open_on_secondary */ |
| 79 | MODULE_PARM_DESC(allow_oos, "DONT USE!"); |
| 80 | /* thanks to these macros, if compiled into the kernel (not-module), |
| 81 | * this becomes the boot parameter drbd.minor_count */ |
| 82 | module_param(minor_count, uint, 0444); |
| 83 | module_param(disable_sendpage, bool, 0644); |
| 84 | module_param(allow_oos, bool, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 85 | module_param(proc_details, int, 0644); |
| 86 | |
| 87 | #ifdef CONFIG_DRBD_FAULT_INJECTION |
| 88 | int enable_faults; |
| 89 | int fault_rate; |
| 90 | static int fault_count; |
| 91 | int fault_devs; |
| 92 | /* bitmap of enabled faults */ |
| 93 | module_param(enable_faults, int, 0664); |
| 94 | /* fault rate % value - applies to all enabled faults */ |
| 95 | module_param(fault_rate, int, 0664); |
| 96 | /* count of faults inserted */ |
| 97 | module_param(fault_count, int, 0664); |
| 98 | /* bitmap of devices to insert faults on */ |
| 99 | module_param(fault_devs, int, 0644); |
| 100 | #endif |
| 101 | |
| 102 | /* module parameter, defined */ |
Philipp Reisner | 2b8a90b | 2011-01-10 11:15:17 +0100 | [diff] [blame] | 103 | unsigned int minor_count = DRBD_MINOR_COUNT_DEF; |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 104 | bool disable_sendpage; |
| 105 | bool allow_oos; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 106 | int proc_details; /* Detail level in proc drbd*/ |
| 107 | |
| 108 | /* Module parameter for setting the user mode helper program |
| 109 | * to run. Default is /sbin/drbdadm */ |
| 110 | char usermode_helper[80] = "/sbin/drbdadm"; |
| 111 | |
| 112 | module_param_string(usermode_helper, usermode_helper, sizeof(usermode_helper), 0644); |
| 113 | |
| 114 | /* in 2.6.x, our device mapping and config info contains our virtual gendisks |
| 115 | * as member "struct gendisk *vdisk;" |
| 116 | */ |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 117 | struct idr drbd_devices; |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 118 | struct list_head drbd_resources; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 119 | |
| 120 | struct kmem_cache *drbd_request_cache; |
Andreas Gruenbacher | 6c852be | 2011-02-04 15:38:52 +0100 | [diff] [blame] | 121 | struct kmem_cache *drbd_ee_cache; /* peer requests */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 122 | struct kmem_cache *drbd_bm_ext_cache; /* bitmap extents */ |
| 123 | struct kmem_cache *drbd_al_ext_cache; /* activity log extents */ |
| 124 | mempool_t *drbd_request_mempool; |
| 125 | mempool_t *drbd_ee_mempool; |
Lars Ellenberg | 4281808 | 2011-02-23 12:39:46 +0100 | [diff] [blame] | 126 | mempool_t *drbd_md_io_page_pool; |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 127 | struct bio_set *drbd_md_io_bio_set; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 128 | |
| 129 | /* I do not use a standard mempool, because: |
| 130 | 1) I want to hand out the pre-allocated objects first. |
| 131 | 2) I want to be able to interrupt sleeping allocation with a signal. |
| 132 | Note: This is a single linked list, the next pointer is the private |
| 133 | member of struct page. |
| 134 | */ |
| 135 | struct page *drbd_pp_pool; |
| 136 | spinlock_t drbd_pp_lock; |
| 137 | int drbd_pp_vacant; |
| 138 | wait_queue_head_t drbd_pp_wait; |
| 139 | |
| 140 | DEFINE_RATELIMIT_STATE(drbd_ratelimit_state, 5 * HZ, 5); |
| 141 | |
Emese Revfy | 7d4e9d0 | 2009-12-14 00:59:30 +0100 | [diff] [blame] | 142 | static const struct block_device_operations drbd_ops = { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 143 | .owner = THIS_MODULE, |
| 144 | .open = drbd_open, |
| 145 | .release = drbd_release, |
| 146 | }; |
| 147 | |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 148 | struct bio *bio_alloc_drbd(gfp_t gfp_mask) |
| 149 | { |
Lars Ellenberg | da4a75d | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 150 | struct bio *bio; |
| 151 | |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 152 | if (!drbd_md_io_bio_set) |
| 153 | return bio_alloc(gfp_mask, 1); |
| 154 | |
Lars Ellenberg | da4a75d | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 155 | bio = bio_alloc_bioset(gfp_mask, 1, drbd_md_io_bio_set); |
| 156 | if (!bio) |
| 157 | return NULL; |
Lars Ellenberg | da4a75d | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 158 | return bio; |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 159 | } |
| 160 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 161 | #ifdef __CHECKER__ |
| 162 | /* When checking with sparse, and this is an inline function, sparse will |
| 163 | give tons of false positives. When this is a real functions sparse works. |
| 164 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 165 | int _get_ldev_if_state(struct drbd_device *device, enum drbd_disk_state mins) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 166 | { |
| 167 | int io_allowed; |
| 168 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 169 | atomic_inc(&device->local_cnt); |
| 170 | io_allowed = (device->state.disk >= mins); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 171 | if (!io_allowed) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 172 | if (atomic_dec_and_test(&device->local_cnt)) |
| 173 | wake_up(&device->misc_wait); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 174 | } |
| 175 | return io_allowed; |
| 176 | } |
| 177 | |
| 178 | #endif |
| 179 | |
| 180 | /** |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 181 | * tl_release() - mark as BARRIER_ACKED all requests in the corresponding transfer log epoch |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 182 | * @connection: DRBD connection. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 183 | * @barrier_nr: Expected identifier of the DRBD write barrier packet. |
| 184 | * @set_size: Expected number of requests before that barrier. |
| 185 | * |
| 186 | * In case the passed barrier_nr or set_size does not match the oldest |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 187 | * epoch of not yet barrier-acked requests, this function will cause a |
| 188 | * termination of the connection. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 189 | */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 190 | void tl_release(struct drbd_connection *connection, unsigned int barrier_nr, |
Philipp Reisner | 2f5cdd0 | 2011-02-21 14:29:27 +0100 | [diff] [blame] | 191 | unsigned int set_size) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 192 | { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 193 | struct drbd_request *r; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 194 | struct drbd_request *req = NULL; |
| 195 | int expect_epoch = 0; |
| 196 | int expect_size = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 197 | |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 198 | spin_lock_irq(&connection->resource->req_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 199 | |
Philipp Reisner | 9868365 | 2012-11-09 14:18:43 +0100 | [diff] [blame] | 200 | /* find oldest not yet barrier-acked write request, |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 201 | * count writes in its epoch. */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 202 | list_for_each_entry(r, &connection->transfer_log, tl_requests) { |
Lars Ellenberg | a0d856d | 2012-01-24 17:19:42 +0100 | [diff] [blame] | 203 | const unsigned s = r->rq_state; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 204 | if (!req) { |
| 205 | if (!(s & RQ_WRITE)) |
| 206 | continue; |
| 207 | if (!(s & RQ_NET_MASK)) |
| 208 | continue; |
| 209 | if (s & RQ_NET_DONE) |
| 210 | continue; |
| 211 | req = r; |
| 212 | expect_epoch = req->epoch; |
| 213 | expect_size ++; |
| 214 | } else { |
| 215 | if (r->epoch != expect_epoch) |
| 216 | break; |
| 217 | if (!(s & RQ_WRITE)) |
| 218 | continue; |
| 219 | /* if (s & RQ_DONE): not expected */ |
| 220 | /* if (!(s & RQ_NET_MASK)): not expected */ |
| 221 | expect_size++; |
| 222 | } |
| 223 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 224 | |
| 225 | /* first some paranoia code */ |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 226 | if (req == NULL) { |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 227 | drbd_err(connection, "BAD! BarrierAck #%u received, but no epoch in tl!?\n", |
Philipp Reisner | 2f5cdd0 | 2011-02-21 14:29:27 +0100 | [diff] [blame] | 228 | barrier_nr); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 229 | goto bail; |
| 230 | } |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 231 | if (expect_epoch != barrier_nr) { |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 232 | drbd_err(connection, "BAD! BarrierAck #%u received, expected #%u!\n", |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 233 | barrier_nr, expect_epoch); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 234 | goto bail; |
| 235 | } |
| 236 | |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 237 | if (expect_size != set_size) { |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 238 | drbd_err(connection, "BAD! BarrierAck #%u received with n_writes=%u, expected n_writes=%u!\n", |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 239 | barrier_nr, set_size, expect_size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 240 | goto bail; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Philipp Reisner | 9868365 | 2012-11-09 14:18:43 +0100 | [diff] [blame] | 243 | /* Clean up list of requests processed during current epoch. */ |
| 244 | /* this extra list walk restart is paranoia, |
| 245 | * to catch requests being barrier-acked "unexpectedly". |
| 246 | * It usually should find the same req again, or some READ preceding it. */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 247 | list_for_each_entry(req, &connection->transfer_log, tl_requests) |
Philipp Reisner | 9868365 | 2012-11-09 14:18:43 +0100 | [diff] [blame] | 248 | if (req->epoch == expect_epoch) |
| 249 | break; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 250 | list_for_each_entry_safe_from(req, r, &connection->transfer_log, tl_requests) { |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 251 | if (req->epoch != expect_epoch) |
| 252 | break; |
| 253 | _req_mod(req, BARRIER_ACKED); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 254 | } |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 255 | spin_unlock_irq(&connection->resource->req_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 256 | |
| 257 | return; |
| 258 | |
| 259 | bail: |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 260 | spin_unlock_irq(&connection->resource->req_lock); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 261 | conn_request_state(connection, NS(conn, C_PROTOCOL_ERROR), CS_HARD); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 262 | } |
| 263 | |
Philipp Reisner | 617049a | 2010-12-22 12:48:31 +0100 | [diff] [blame] | 264 | |
Philipp Reisner | 11b58e7 | 2010-05-12 17:08:26 +0200 | [diff] [blame] | 265 | /** |
| 266 | * _tl_restart() - Walks the transfer log, and applies an action to all requests |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 267 | * @device: DRBD device. |
Philipp Reisner | 11b58e7 | 2010-05-12 17:08:26 +0200 | [diff] [blame] | 268 | * @what: The action/event to perform with all request objects |
| 269 | * |
Andreas Gruenbacher | 8554df1 | 2011-01-25 15:37:43 +0100 | [diff] [blame] | 270 | * @what might be one of CONNECTION_LOST_WHILE_PENDING, RESEND, FAIL_FROZEN_DISK_IO, |
| 271 | * RESTART_FROZEN_DISK_IO. |
Philipp Reisner | 11b58e7 | 2010-05-12 17:08:26 +0200 | [diff] [blame] | 272 | */ |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 273 | /* must hold resource->req_lock */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 274 | void _tl_restart(struct drbd_connection *connection, enum drbd_req_event what) |
Philipp Reisner | 11b58e7 | 2010-05-12 17:08:26 +0200 | [diff] [blame] | 275 | { |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 276 | struct drbd_request *req, *r; |
Philipp Reisner | 11b58e7 | 2010-05-12 17:08:26 +0200 | [diff] [blame] | 277 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 278 | list_for_each_entry_safe(req, r, &connection->transfer_log, tl_requests) |
Philipp Reisner | 509fc01 | 2012-07-31 11:22:58 +0200 | [diff] [blame] | 279 | _req_mod(req, what); |
Philipp Reisner | 11b58e7 | 2010-05-12 17:08:26 +0200 | [diff] [blame] | 280 | } |
| 281 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 282 | void tl_restart(struct drbd_connection *connection, enum drbd_req_event what) |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 283 | { |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 284 | spin_lock_irq(&connection->resource->req_lock); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 285 | _tl_restart(connection, what); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 286 | spin_unlock_irq(&connection->resource->req_lock); |
Philipp Reisner | cdfda63 | 2011-07-05 15:38:59 +0200 | [diff] [blame] | 287 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 288 | |
| 289 | /** |
| 290 | * tl_clear() - Clears all requests and &struct drbd_tl_epoch objects out of the TL |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 291 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 292 | * |
| 293 | * This is called after the connection to the peer was lost. The storage covered |
| 294 | * by the requests on the transfer gets marked as our of sync. Called from the |
| 295 | * receiver thread and the worker thread. |
| 296 | */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 297 | void tl_clear(struct drbd_connection *connection) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 298 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 299 | tl_restart(connection, CONNECTION_LOST_WHILE_PENDING); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 300 | } |
| 301 | |
| 302 | /** |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 303 | * tl_abort_disk_io() - Abort disk I/O for all requests for a certain device in the TL |
| 304 | * @device: DRBD device. |
Philipp Reisner | fd2491f | 2011-07-18 16:25:15 +0200 | [diff] [blame] | 305 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 306 | void tl_abort_disk_io(struct drbd_device *device) |
Philipp Reisner | fd2491f | 2011-07-18 16:25:15 +0200 | [diff] [blame] | 307 | { |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 308 | struct drbd_connection *connection = first_peer_device(device)->connection; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 309 | struct drbd_request *req, *r; |
Philipp Reisner | fd2491f | 2011-07-18 16:25:15 +0200 | [diff] [blame] | 310 | |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 311 | spin_lock_irq(&connection->resource->req_lock); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 312 | list_for_each_entry_safe(req, r, &connection->transfer_log, tl_requests) { |
Philipp Reisner | fd2491f | 2011-07-18 16:25:15 +0200 | [diff] [blame] | 313 | if (!(req->rq_state & RQ_LOCAL_PENDING)) |
| 314 | continue; |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 315 | if (req->device != device) |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 316 | continue; |
| 317 | _req_mod(req, ABORT_DISK_IO); |
Philipp Reisner | fd2491f | 2011-07-18 16:25:15 +0200 | [diff] [blame] | 318 | } |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 319 | spin_unlock_irq(&connection->resource->req_lock); |
Philipp Reisner | fd2491f | 2011-07-18 16:25:15 +0200 | [diff] [blame] | 320 | } |
| 321 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 322 | static int drbd_thread_setup(void *arg) |
| 323 | { |
| 324 | struct drbd_thread *thi = (struct drbd_thread *) arg; |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 325 | struct drbd_resource *resource = thi->resource; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 326 | unsigned long flags; |
| 327 | int retval; |
| 328 | |
Philipp Reisner | f1b3a6e | 2011-02-08 15:35:58 +0100 | [diff] [blame] | 329 | snprintf(current->comm, sizeof(current->comm), "drbd_%c_%s", |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 330 | thi->name[0], |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 331 | resource->name); |
Philipp Reisner | f1b3a6e | 2011-02-08 15:35:58 +0100 | [diff] [blame] | 332 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 333 | restart: |
| 334 | retval = thi->function(thi); |
| 335 | |
| 336 | spin_lock_irqsave(&thi->t_lock, flags); |
| 337 | |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 338 | /* if the receiver has been "EXITING", the last thing it did |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 339 | * was set the conn state to "StandAlone", |
| 340 | * if now a re-connect request comes in, conn state goes C_UNCONNECTED, |
| 341 | * and receiver thread will be "started". |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 342 | * drbd_thread_start needs to set "RESTARTING" in that case. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 343 | * t_state check and assignment needs to be within the same spinlock, |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 344 | * so either thread_start sees EXITING, and can remap to RESTARTING, |
| 345 | * or thread_start see NONE, and can proceed as normal. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 346 | */ |
| 347 | |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 348 | if (thi->t_state == RESTARTING) { |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 349 | drbd_info(resource, "Restarting %s thread\n", thi->name); |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 350 | thi->t_state = RUNNING; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 351 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 352 | goto restart; |
| 353 | } |
| 354 | |
| 355 | thi->task = NULL; |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 356 | thi->t_state = NONE; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 357 | smp_mb(); |
Lars Ellenberg | 992d6e9 | 2011-05-02 11:47:18 +0200 | [diff] [blame] | 358 | complete_all(&thi->stop); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 359 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 360 | |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 361 | drbd_info(resource, "Terminating %s\n", current->comm); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 362 | |
| 363 | /* Release mod reference taken when thread was started */ |
Philipp Reisner | 9dc9fbb | 2011-04-22 15:23:32 +0200 | [diff] [blame] | 364 | |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 365 | if (thi->connection) |
| 366 | kref_put(&thi->connection->kref, drbd_destroy_connection); |
| 367 | kref_put(&resource->kref, drbd_destroy_resource); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 368 | module_put(THIS_MODULE); |
| 369 | return retval; |
| 370 | } |
| 371 | |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 372 | static void drbd_thread_init(struct drbd_resource *resource, struct drbd_thread *thi, |
Andreas Gruenbacher | c60b025 | 2011-08-10 15:05:02 +0200 | [diff] [blame] | 373 | int (*func) (struct drbd_thread *), const char *name) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 374 | { |
| 375 | spin_lock_init(&thi->t_lock); |
| 376 | thi->task = NULL; |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 377 | thi->t_state = NONE; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 378 | thi->function = func; |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 379 | thi->resource = resource; |
| 380 | thi->connection = NULL; |
Andreas Gruenbacher | c60b025 | 2011-08-10 15:05:02 +0200 | [diff] [blame] | 381 | thi->name = name; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 382 | } |
| 383 | |
| 384 | int drbd_thread_start(struct drbd_thread *thi) |
| 385 | { |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 386 | struct drbd_resource *resource = thi->resource; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 387 | struct task_struct *nt; |
| 388 | unsigned long flags; |
| 389 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 390 | /* is used from state engine doing drbd_thread_stop_nowait, |
| 391 | * while holding the req lock irqsave */ |
| 392 | spin_lock_irqsave(&thi->t_lock, flags); |
| 393 | |
| 394 | switch (thi->t_state) { |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 395 | case NONE: |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 396 | drbd_info(resource, "Starting %s thread (from %s [%d])\n", |
Philipp Reisner | bed879a | 2011-02-04 14:00:37 +0100 | [diff] [blame] | 397 | thi->name, current->comm, current->pid); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 398 | |
| 399 | /* Get ref on module for thread - this is released when thread exits */ |
| 400 | if (!try_module_get(THIS_MODULE)) { |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 401 | drbd_err(resource, "Failed to get module reference in drbd_thread_start\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 402 | spin_unlock_irqrestore(&thi->t_lock, flags); |
Andreas Gruenbacher | 81e8465 | 2010-12-09 15:03:57 +0100 | [diff] [blame] | 403 | return false; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 404 | } |
| 405 | |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 406 | kref_get(&resource->kref); |
| 407 | if (thi->connection) |
| 408 | kref_get(&thi->connection->kref); |
Philipp Reisner | 9dc9fbb | 2011-04-22 15:23:32 +0200 | [diff] [blame] | 409 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 410 | init_completion(&thi->stop); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 411 | thi->reset_cpu_mask = 1; |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 412 | thi->t_state = RUNNING; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 413 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 414 | flush_signals(current); /* otherw. may get -ERESTARTNOINTR */ |
| 415 | |
| 416 | nt = kthread_create(drbd_thread_setup, (void *) thi, |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 417 | "drbd_%c_%s", thi->name[0], thi->resource->name); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 418 | |
| 419 | if (IS_ERR(nt)) { |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 420 | drbd_err(resource, "Couldn't start thread\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 421 | |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 422 | if (thi->connection) |
| 423 | kref_put(&thi->connection->kref, drbd_destroy_connection); |
| 424 | kref_put(&resource->kref, drbd_destroy_resource); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 425 | module_put(THIS_MODULE); |
Andreas Gruenbacher | 81e8465 | 2010-12-09 15:03:57 +0100 | [diff] [blame] | 426 | return false; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 427 | } |
| 428 | spin_lock_irqsave(&thi->t_lock, flags); |
| 429 | thi->task = nt; |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 430 | thi->t_state = RUNNING; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 431 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 432 | wake_up_process(nt); |
| 433 | break; |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 434 | case EXITING: |
| 435 | thi->t_state = RESTARTING; |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 436 | drbd_info(resource, "Restarting %s thread (from %s [%d])\n", |
Philipp Reisner | bed879a | 2011-02-04 14:00:37 +0100 | [diff] [blame] | 437 | thi->name, current->comm, current->pid); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 438 | /* fall through */ |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 439 | case RUNNING: |
| 440 | case RESTARTING: |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 441 | default: |
| 442 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 443 | break; |
| 444 | } |
| 445 | |
Andreas Gruenbacher | 81e8465 | 2010-12-09 15:03:57 +0100 | [diff] [blame] | 446 | return true; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | |
| 450 | void _drbd_thread_stop(struct drbd_thread *thi, int restart, int wait) |
| 451 | { |
| 452 | unsigned long flags; |
| 453 | |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 454 | enum drbd_thread_state ns = restart ? RESTARTING : EXITING; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 455 | |
| 456 | /* may be called from state engine, holding the req lock irqsave */ |
| 457 | spin_lock_irqsave(&thi->t_lock, flags); |
| 458 | |
Andreas Gruenbacher | e77a0a5 | 2011-01-25 15:43:39 +0100 | [diff] [blame] | 459 | if (thi->t_state == NONE) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 460 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 461 | if (restart) |
| 462 | drbd_thread_start(thi); |
| 463 | return; |
| 464 | } |
| 465 | |
| 466 | if (thi->t_state != ns) { |
| 467 | if (thi->task == NULL) { |
| 468 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 469 | return; |
| 470 | } |
| 471 | |
| 472 | thi->t_state = ns; |
| 473 | smp_mb(); |
| 474 | init_completion(&thi->stop); |
| 475 | if (thi->task != current) |
| 476 | force_sig(DRBD_SIGKILL, thi->task); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | spin_unlock_irqrestore(&thi->t_lock, flags); |
| 480 | |
| 481 | if (wait) |
| 482 | wait_for_completion(&thi->stop); |
| 483 | } |
| 484 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 485 | int conn_lowest_minor(struct drbd_connection *connection) |
Philipp Reisner | 8082228 | 2011-02-08 12:46:30 +0100 | [diff] [blame] | 486 | { |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 487 | struct drbd_peer_device *peer_device; |
| 488 | int vnr = 0, minor = -1; |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 489 | |
Philipp Reisner | 695d08f | 2011-04-11 22:53:32 -0700 | [diff] [blame] | 490 | rcu_read_lock(); |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 491 | peer_device = idr_get_next(&connection->peer_devices, &vnr); |
| 492 | if (peer_device) |
| 493 | minor = device_to_minor(peer_device->device); |
Philipp Reisner | 695d08f | 2011-04-11 22:53:32 -0700 | [diff] [blame] | 494 | rcu_read_unlock(); |
| 495 | |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 496 | return minor; |
Philipp Reisner | 8082228 | 2011-02-08 12:46:30 +0100 | [diff] [blame] | 497 | } |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 498 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 499 | #ifdef CONFIG_SMP |
| 500 | /** |
| 501 | * drbd_calc_cpu_mask() - Generate CPU masks, spread over all CPUs |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 502 | * |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 503 | * Forces all threads of a resource onto the same CPU. This is beneficial for |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 504 | * DRBD's performance. May be overwritten by user's configuration. |
| 505 | */ |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 506 | static void drbd_calc_cpu_mask(cpumask_var_t *cpu_mask) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 507 | { |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 508 | unsigned int *resources_per_cpu, min_index = ~0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 509 | |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 510 | resources_per_cpu = kzalloc(nr_cpu_ids * sizeof(*resources_per_cpu), GFP_KERNEL); |
| 511 | if (resources_per_cpu) { |
| 512 | struct drbd_resource *resource; |
| 513 | unsigned int cpu, min = ~0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 514 | |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 515 | rcu_read_lock(); |
| 516 | for_each_resource_rcu(resource, &drbd_resources) { |
| 517 | for_each_cpu(cpu, resource->cpu_mask) |
| 518 | resources_per_cpu[cpu]++; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 519 | } |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 520 | rcu_read_unlock(); |
| 521 | for_each_online_cpu(cpu) { |
| 522 | if (resources_per_cpu[cpu] < min) { |
| 523 | min = resources_per_cpu[cpu]; |
| 524 | min_index = cpu; |
| 525 | } |
| 526 | } |
| 527 | kfree(resources_per_cpu); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 528 | } |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 529 | if (min_index == ~0) { |
| 530 | cpumask_setall(*cpu_mask); |
| 531 | return; |
| 532 | } |
| 533 | cpumask_set_cpu(min_index, *cpu_mask); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | /** |
| 537 | * drbd_thread_current_set_cpu() - modifies the cpu mask of the _current_ thread |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 538 | * @device: DRBD device. |
Philipp Reisner | bc31fe3 | 2011-02-07 11:14:38 +0100 | [diff] [blame] | 539 | * @thi: drbd_thread object |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 540 | * |
| 541 | * call in the "main loop" of _all_ threads, no need for any mutex, current won't die |
| 542 | * prematurely. |
| 543 | */ |
Philipp Reisner | 8082228 | 2011-02-08 12:46:30 +0100 | [diff] [blame] | 544 | void drbd_thread_current_set_cpu(struct drbd_thread *thi) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 545 | { |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 546 | struct drbd_resource *resource = thi->resource; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 547 | struct task_struct *p = current; |
Philipp Reisner | bed879a | 2011-02-04 14:00:37 +0100 | [diff] [blame] | 548 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 549 | if (!thi->reset_cpu_mask) |
| 550 | return; |
| 551 | thi->reset_cpu_mask = 0; |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 552 | set_cpus_allowed_ptr(p, resource->cpu_mask); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 553 | } |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 554 | #else |
| 555 | #define drbd_calc_cpu_mask(A) ({}) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 556 | #endif |
| 557 | |
Andreas Gruenbacher | 52b061a | 2011-03-30 11:38:49 +0200 | [diff] [blame] | 558 | /** |
| 559 | * drbd_header_size - size of a packet header |
| 560 | * |
| 561 | * The header size is a multiple of 8, so any payload following the header is |
| 562 | * word aligned on 64-bit architectures. (The bitmap send and receive code |
| 563 | * relies on this.) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 564 | */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 565 | unsigned int drbd_header_size(struct drbd_connection *connection) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 566 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 567 | if (connection->agreed_pro_version >= 100) { |
Andreas Gruenbacher | 0c8e36d | 2011-03-30 16:00:17 +0200 | [diff] [blame] | 568 | BUILD_BUG_ON(!IS_ALIGNED(sizeof(struct p_header100), 8)); |
| 569 | return sizeof(struct p_header100); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 570 | } else { |
Andreas Gruenbacher | 0c8e36d | 2011-03-30 16:00:17 +0200 | [diff] [blame] | 571 | BUILD_BUG_ON(sizeof(struct p_header80) != |
| 572 | sizeof(struct p_header95)); |
| 573 | BUILD_BUG_ON(!IS_ALIGNED(sizeof(struct p_header80), 8)); |
| 574 | return sizeof(struct p_header80); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 575 | } |
Andreas Gruenbacher | 52b061a | 2011-03-30 11:38:49 +0200 | [diff] [blame] | 576 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 577 | |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 578 | static unsigned int prepare_header80(struct p_header80 *h, enum drbd_packet cmd, int size) |
Philipp Reisner | fd340c1 | 2011-01-19 16:57:39 +0100 | [diff] [blame] | 579 | { |
| 580 | h->magic = cpu_to_be32(DRBD_MAGIC); |
| 581 | h->command = cpu_to_be16(cmd); |
| 582 | h->length = cpu_to_be16(size); |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 583 | return sizeof(struct p_header80); |
Philipp Reisner | fd340c1 | 2011-01-19 16:57:39 +0100 | [diff] [blame] | 584 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 585 | |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 586 | static unsigned int prepare_header95(struct p_header95 *h, enum drbd_packet cmd, int size) |
Philipp Reisner | fd340c1 | 2011-01-19 16:57:39 +0100 | [diff] [blame] | 587 | { |
| 588 | h->magic = cpu_to_be16(DRBD_MAGIC_BIG); |
| 589 | h->command = cpu_to_be16(cmd); |
Andreas Gruenbacher | b55d84b | 2011-03-22 13:17:47 +0100 | [diff] [blame] | 590 | h->length = cpu_to_be32(size); |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 591 | return sizeof(struct p_header95); |
Philipp Reisner | fd340c1 | 2011-01-19 16:57:39 +0100 | [diff] [blame] | 592 | } |
| 593 | |
Andreas Gruenbacher | 0c8e36d | 2011-03-30 16:00:17 +0200 | [diff] [blame] | 594 | static unsigned int prepare_header100(struct p_header100 *h, enum drbd_packet cmd, |
| 595 | int size, int vnr) |
Philipp Reisner | d38e787 | 2011-02-07 15:32:04 +0100 | [diff] [blame] | 596 | { |
Andreas Gruenbacher | 0c8e36d | 2011-03-30 16:00:17 +0200 | [diff] [blame] | 597 | h->magic = cpu_to_be32(DRBD_MAGIC_100); |
| 598 | h->volume = cpu_to_be16(vnr); |
| 599 | h->command = cpu_to_be16(cmd); |
| 600 | h->length = cpu_to_be32(size); |
| 601 | h->pad = 0; |
| 602 | return sizeof(struct p_header100); |
| 603 | } |
| 604 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 605 | static unsigned int prepare_header(struct drbd_connection *connection, int vnr, |
Andreas Gruenbacher | 0c8e36d | 2011-03-30 16:00:17 +0200 | [diff] [blame] | 606 | void *buffer, enum drbd_packet cmd, int size) |
| 607 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 608 | if (connection->agreed_pro_version >= 100) |
Andreas Gruenbacher | 0c8e36d | 2011-03-30 16:00:17 +0200 | [diff] [blame] | 609 | return prepare_header100(buffer, cmd, size, vnr); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 610 | else if (connection->agreed_pro_version >= 95 && |
Andreas Gruenbacher | 0c8e36d | 2011-03-30 16:00:17 +0200 | [diff] [blame] | 611 | size > DRBD_MAX_SIZE_H80_PACKET) |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 612 | return prepare_header95(buffer, cmd, size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 613 | else |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 614 | return prepare_header80(buffer, cmd, size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 615 | } |
| 616 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 617 | static void *__conn_prepare_command(struct drbd_connection *connection, |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 618 | struct drbd_socket *sock) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 619 | { |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 620 | if (!sock->socket) |
| 621 | return NULL; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 622 | return sock->sbuf + drbd_header_size(connection); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 623 | } |
| 624 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 625 | void *conn_prepare_command(struct drbd_connection *connection, struct drbd_socket *sock) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 626 | { |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 627 | void *p; |
| 628 | |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 629 | mutex_lock(&sock->mutex); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 630 | p = __conn_prepare_command(connection, sock); |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 631 | if (!p) |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 632 | mutex_unlock(&sock->mutex); |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 633 | |
| 634 | return p; |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 635 | } |
| 636 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 637 | void *drbd_prepare_command(struct drbd_peer_device *peer_device, struct drbd_socket *sock) |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 638 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 639 | return conn_prepare_command(peer_device->connection, sock); |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 640 | } |
| 641 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 642 | static int __send_command(struct drbd_connection *connection, int vnr, |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 643 | struct drbd_socket *sock, enum drbd_packet cmd, |
| 644 | unsigned int header_size, void *data, |
| 645 | unsigned int size) |
| 646 | { |
| 647 | int msg_flags; |
| 648 | int err; |
| 649 | |
| 650 | /* |
| 651 | * Called with @data == NULL and the size of the data blocks in @size |
| 652 | * for commands that send data blocks. For those commands, omit the |
| 653 | * MSG_MORE flag: this will increase the likelihood that data blocks |
| 654 | * which are page aligned on the sender will end up page aligned on the |
| 655 | * receiver. |
| 656 | */ |
| 657 | msg_flags = data ? MSG_MORE : 0; |
| 658 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 659 | header_size += prepare_header(connection, vnr, sock->sbuf, cmd, |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 660 | header_size + size); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 661 | err = drbd_send_all(connection, sock->socket, sock->sbuf, header_size, |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 662 | msg_flags); |
| 663 | if (data && !err) |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 664 | err = drbd_send_all(connection, sock->socket, data, size, 0); |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 665 | return err; |
| 666 | } |
| 667 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 668 | static int __conn_send_command(struct drbd_connection *connection, struct drbd_socket *sock, |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 669 | enum drbd_packet cmd, unsigned int header_size, |
| 670 | void *data, unsigned int size) |
| 671 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 672 | return __send_command(connection, 0, sock, cmd, header_size, data, size); |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 673 | } |
| 674 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 675 | int conn_send_command(struct drbd_connection *connection, struct drbd_socket *sock, |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 676 | enum drbd_packet cmd, unsigned int header_size, |
| 677 | void *data, unsigned int size) |
| 678 | { |
| 679 | int err; |
| 680 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 681 | err = __conn_send_command(connection, sock, cmd, header_size, data, size); |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 682 | mutex_unlock(&sock->mutex); |
| 683 | return err; |
| 684 | } |
| 685 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 686 | int drbd_send_command(struct drbd_peer_device *peer_device, struct drbd_socket *sock, |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 687 | enum drbd_packet cmd, unsigned int header_size, |
| 688 | void *data, unsigned int size) |
| 689 | { |
| 690 | int err; |
| 691 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 692 | err = __send_command(peer_device->connection, peer_device->device->vnr, |
| 693 | sock, cmd, header_size, data, size); |
Andreas Gruenbacher | dba5858 | 2011-03-29 16:55:40 +0200 | [diff] [blame] | 694 | mutex_unlock(&sock->mutex); |
| 695 | return err; |
| 696 | } |
| 697 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 698 | int drbd_send_ping(struct drbd_connection *connection) |
Andreas Gruenbacher | e307f35 | 2011-03-22 10:55:48 +0100 | [diff] [blame] | 699 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 700 | struct drbd_socket *sock; |
| 701 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 702 | sock = &connection->meta; |
| 703 | if (!conn_prepare_command(connection, sock)) |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 704 | return -EIO; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 705 | return conn_send_command(connection, sock, P_PING, 0, NULL, 0); |
Andreas Gruenbacher | e307f35 | 2011-03-22 10:55:48 +0100 | [diff] [blame] | 706 | } |
| 707 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 708 | int drbd_send_ping_ack(struct drbd_connection *connection) |
Andreas Gruenbacher | e307f35 | 2011-03-22 10:55:48 +0100 | [diff] [blame] | 709 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 710 | struct drbd_socket *sock; |
| 711 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 712 | sock = &connection->meta; |
| 713 | if (!conn_prepare_command(connection, sock)) |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 714 | return -EIO; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 715 | return conn_send_command(connection, sock, P_PING_ACK, 0, NULL, 0); |
Andreas Gruenbacher | e307f35 | 2011-03-22 10:55:48 +0100 | [diff] [blame] | 716 | } |
| 717 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 718 | int drbd_send_sync_param(struct drbd_peer_device *peer_device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 719 | { |
Andreas Gruenbacher | 7c96715 | 2011-03-22 00:49:36 +0100 | [diff] [blame] | 720 | struct drbd_socket *sock; |
Philipp Reisner | 8e26f9c | 2010-07-06 17:25:54 +0200 | [diff] [blame] | 721 | struct p_rs_param_95 *p; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 722 | int size; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 723 | const int apv = peer_device->connection->agreed_pro_version; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 724 | enum drbd_packet cmd; |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 725 | struct net_conf *nc; |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 726 | struct disk_conf *dc; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 727 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 728 | sock = &peer_device->connection->data; |
| 729 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 730 | if (!p) |
| 731 | return -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 732 | |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 733 | rcu_read_lock(); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 734 | nc = rcu_dereference(peer_device->connection->net_conf); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 735 | |
| 736 | size = apv <= 87 ? sizeof(struct p_rs_param) |
| 737 | : apv == 88 ? sizeof(struct p_rs_param) |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 738 | + strlen(nc->verify_alg) + 1 |
Philipp Reisner | 8e26f9c | 2010-07-06 17:25:54 +0200 | [diff] [blame] | 739 | : apv <= 94 ? sizeof(struct p_rs_param_89) |
| 740 | : /* apv >= 95 */ sizeof(struct p_rs_param_95); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 741 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 742 | cmd = apv >= 89 ? P_SYNC_PARAM89 : P_SYNC_PARAM; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 743 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 744 | /* initialize verify_alg and csums_alg */ |
| 745 | memset(p->verify_alg, 0, 2 * SHARED_SECRET_MAX); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 746 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 747 | if (get_ldev(peer_device->device)) { |
| 748 | dc = rcu_dereference(peer_device->device->ldev->disk_conf); |
Andreas Gruenbacher | 6394b93 | 2011-05-11 14:29:52 +0200 | [diff] [blame] | 749 | p->resync_rate = cpu_to_be32(dc->resync_rate); |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 750 | p->c_plan_ahead = cpu_to_be32(dc->c_plan_ahead); |
| 751 | p->c_delay_target = cpu_to_be32(dc->c_delay_target); |
| 752 | p->c_fill_target = cpu_to_be32(dc->c_fill_target); |
| 753 | p->c_max_rate = cpu_to_be32(dc->c_max_rate); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 754 | put_ldev(peer_device->device); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 755 | } else { |
Andreas Gruenbacher | 6394b93 | 2011-05-11 14:29:52 +0200 | [diff] [blame] | 756 | p->resync_rate = cpu_to_be32(DRBD_RESYNC_RATE_DEF); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 757 | p->c_plan_ahead = cpu_to_be32(DRBD_C_PLAN_AHEAD_DEF); |
| 758 | p->c_delay_target = cpu_to_be32(DRBD_C_DELAY_TARGET_DEF); |
| 759 | p->c_fill_target = cpu_to_be32(DRBD_C_FILL_TARGET_DEF); |
| 760 | p->c_max_rate = cpu_to_be32(DRBD_C_MAX_RATE_DEF); |
| 761 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 762 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 763 | if (apv >= 88) |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 764 | strcpy(p->verify_alg, nc->verify_alg); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 765 | if (apv >= 89) |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 766 | strcpy(p->csums_alg, nc->csums_alg); |
| 767 | rcu_read_unlock(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 768 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 769 | return drbd_send_command(peer_device, sock, cmd, size, NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 770 | } |
| 771 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 772 | int __drbd_send_protocol(struct drbd_connection *connection, enum drbd_packet cmd) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 773 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 774 | struct drbd_socket *sock; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 775 | struct p_protocol *p; |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 776 | struct net_conf *nc; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 777 | int size, cf; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 778 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 779 | sock = &connection->data; |
| 780 | p = __conn_prepare_command(connection, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 781 | if (!p) |
| 782 | return -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 783 | |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 784 | rcu_read_lock(); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 785 | nc = rcu_dereference(connection->net_conf); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 786 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 787 | if (nc->tentative && connection->agreed_pro_version < 92) { |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 788 | rcu_read_unlock(); |
| 789 | mutex_unlock(&sock->mutex); |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 790 | drbd_err(connection, "--dry-run is not supported by peer"); |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 791 | return -EOPNOTSUPP; |
Philipp Reisner | cf14c2e | 2010-02-02 21:03:50 +0100 | [diff] [blame] | 792 | } |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 793 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 794 | size = sizeof(*p); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 795 | if (connection->agreed_pro_version >= 87) |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 796 | size += strlen(nc->integrity_alg) + 1; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 797 | |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 798 | p->protocol = cpu_to_be32(nc->wire_protocol); |
| 799 | p->after_sb_0p = cpu_to_be32(nc->after_sb_0p); |
| 800 | p->after_sb_1p = cpu_to_be32(nc->after_sb_1p); |
| 801 | p->after_sb_2p = cpu_to_be32(nc->after_sb_2p); |
| 802 | p->two_primaries = cpu_to_be32(nc->two_primaries); |
Philipp Reisner | cf14c2e | 2010-02-02 21:03:50 +0100 | [diff] [blame] | 803 | cf = 0; |
Andreas Gruenbacher | 6139f60 | 2011-05-06 20:00:02 +0200 | [diff] [blame] | 804 | if (nc->discard_my_data) |
| 805 | cf |= CF_DISCARD_MY_DATA; |
Andreas Gruenbacher | 6dff290 | 2011-06-28 14:18:12 +0200 | [diff] [blame] | 806 | if (nc->tentative) |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 807 | cf |= CF_DRY_RUN; |
Philipp Reisner | cf14c2e | 2010-02-02 21:03:50 +0100 | [diff] [blame] | 808 | p->conn_flags = cpu_to_be32(cf); |
| 809 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 810 | if (connection->agreed_pro_version >= 87) |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 811 | strcpy(p->integrity_alg, nc->integrity_alg); |
| 812 | rcu_read_unlock(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 813 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 814 | return __conn_send_command(connection, sock, cmd, size, NULL, 0); |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 815 | } |
| 816 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 817 | int drbd_send_protocol(struct drbd_connection *connection) |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 818 | { |
| 819 | int err; |
| 820 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 821 | mutex_lock(&connection->data.mutex); |
| 822 | err = __drbd_send_protocol(connection, P_PROTOCOL); |
| 823 | mutex_unlock(&connection->data.mutex); |
Andreas Gruenbacher | a7eb7bd | 2011-04-29 13:19:58 +0200 | [diff] [blame] | 824 | |
| 825 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 826 | } |
| 827 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 828 | static int _drbd_send_uuids(struct drbd_peer_device *peer_device, u64 uuid_flags) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 829 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 830 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 831 | struct drbd_socket *sock; |
| 832 | struct p_uuids *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 833 | int i; |
| 834 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 835 | if (!get_ldev_if_state(device, D_NEGOTIATING)) |
Andreas Gruenbacher | 2ae5f95 | 2011-03-16 01:07:20 +0100 | [diff] [blame] | 836 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 837 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 838 | sock = &peer_device->connection->data; |
| 839 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 840 | if (!p) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 841 | put_ldev(device); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 842 | return -EIO; |
| 843 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 844 | spin_lock_irq(&device->ldev->md.uuid_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 845 | for (i = UI_CURRENT; i < UI_SIZE; i++) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 846 | p->uuid[i] = cpu_to_be64(device->ldev->md.uuid[i]); |
| 847 | spin_unlock_irq(&device->ldev->md.uuid_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 848 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 849 | device->comm_bm_set = drbd_bm_total_weight(device); |
| 850 | p->uuid[UI_SIZE] = cpu_to_be64(device->comm_bm_set); |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 851 | rcu_read_lock(); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 852 | uuid_flags |= rcu_dereference(peer_device->connection->net_conf)->discard_my_data ? 1 : 0; |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 853 | rcu_read_unlock(); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 854 | uuid_flags |= test_bit(CRASHED_PRIMARY, &device->flags) ? 2 : 0; |
| 855 | uuid_flags |= device->new_state_tmp.disk == D_INCONSISTENT ? 4 : 0; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 856 | p->uuid[UI_FLAGS] = cpu_to_be64(uuid_flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 857 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 858 | put_ldev(device); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 859 | return drbd_send_command(peer_device, sock, P_UUIDS, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 860 | } |
| 861 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 862 | int drbd_send_uuids(struct drbd_peer_device *peer_device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 863 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 864 | return _drbd_send_uuids(peer_device, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 865 | } |
| 866 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 867 | int drbd_send_uuids_skip_initial_sync(struct drbd_peer_device *peer_device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 868 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 869 | return _drbd_send_uuids(peer_device, 8); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 870 | } |
| 871 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 872 | void drbd_print_uuids(struct drbd_device *device, const char *text) |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 873 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 874 | if (get_ldev_if_state(device, D_NEGOTIATING)) { |
| 875 | u64 *uuid = device->ldev->md.uuid; |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 876 | drbd_info(device, "%s %016llX:%016llX:%016llX:%016llX\n", |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 877 | text, |
| 878 | (unsigned long long)uuid[UI_CURRENT], |
| 879 | (unsigned long long)uuid[UI_BITMAP], |
| 880 | (unsigned long long)uuid[UI_HISTORY_START], |
| 881 | (unsigned long long)uuid[UI_HISTORY_END]); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 882 | put_ldev(device); |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 883 | } else { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 884 | drbd_info(device, "%s effective data uuid: %016llX\n", |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 885 | text, |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 886 | (unsigned long long)device->ed_uuid); |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 887 | } |
| 888 | } |
| 889 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 890 | void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *peer_device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 891 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 892 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 893 | struct drbd_socket *sock; |
| 894 | struct p_rs_uuid *p; |
Lars Ellenberg | 5a22db8 | 2010-12-17 21:14:23 +0100 | [diff] [blame] | 895 | u64 uuid; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 896 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 897 | D_ASSERT(device, device->state.disk == D_UP_TO_DATE); |
Lars Ellenberg | 5a22db8 | 2010-12-17 21:14:23 +0100 | [diff] [blame] | 898 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 899 | uuid = device->ldev->md.uuid[UI_BITMAP]; |
Philipp Reisner | 5ba3dac | 2011-10-05 15:54:18 +0200 | [diff] [blame] | 900 | if (uuid && uuid != UUID_JUST_CREATED) |
| 901 | uuid = uuid + UUID_NEW_BM_OFFSET; |
| 902 | else |
| 903 | get_random_bytes(&uuid, sizeof(u64)); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 904 | drbd_uuid_set(device, UI_BITMAP, uuid); |
| 905 | drbd_print_uuids(device, "updated sync UUID"); |
| 906 | drbd_md_sync(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 907 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 908 | sock = &peer_device->connection->data; |
| 909 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 910 | if (p) { |
| 911 | p->uuid = cpu_to_be64(uuid); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 912 | drbd_send_command(peer_device, sock, P_SYNC_UUID, sizeof(*p), NULL, 0); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 913 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 914 | } |
| 915 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 916 | int drbd_send_sizes(struct drbd_peer_device *peer_device, int trigger_reply, enum dds_flags flags) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 917 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 918 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 919 | struct drbd_socket *sock; |
| 920 | struct p_sizes *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 921 | sector_t d_size, u_size; |
Lars Ellenberg | db141b2 | 2012-06-25 19:15:58 +0200 | [diff] [blame] | 922 | int q_order_type; |
| 923 | unsigned int max_bio_size; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 924 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 925 | if (get_ldev_if_state(device, D_NEGOTIATING)) { |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 926 | D_ASSERT(device, device->ldev->backing_bdev); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 927 | d_size = drbd_get_max_capacity(device->ldev); |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 928 | rcu_read_lock(); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 929 | u_size = rcu_dereference(device->ldev->disk_conf)->disk_size; |
Philipp Reisner | daeda1c | 2011-05-03 15:00:55 +0200 | [diff] [blame] | 930 | rcu_read_unlock(); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 931 | q_order_type = drbd_queue_order_type(device); |
| 932 | max_bio_size = queue_max_hw_sectors(device->ldev->backing_bdev->bd_disk->queue) << 9; |
Lars Ellenberg | db141b2 | 2012-06-25 19:15:58 +0200 | [diff] [blame] | 933 | max_bio_size = min(max_bio_size, DRBD_MAX_BIO_SIZE); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 934 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 935 | } else { |
| 936 | d_size = 0; |
| 937 | u_size = 0; |
| 938 | q_order_type = QUEUE_ORDERED_NONE; |
Philipp Reisner | 99432fc | 2011-05-20 16:39:13 +0200 | [diff] [blame] | 939 | max_bio_size = DRBD_MAX_BIO_SIZE; /* ... multiple BIOs per peer_request */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 940 | } |
| 941 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 942 | sock = &peer_device->connection->data; |
| 943 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 944 | if (!p) |
| 945 | return -EIO; |
Philipp Reisner | 2ffca4f | 2011-06-30 15:43:06 +0200 | [diff] [blame] | 946 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 947 | if (peer_device->connection->agreed_pro_version <= 94) |
Lars Ellenberg | db141b2 | 2012-06-25 19:15:58 +0200 | [diff] [blame] | 948 | max_bio_size = min(max_bio_size, DRBD_MAX_SIZE_H80_PACKET); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 949 | else if (peer_device->connection->agreed_pro_version < 100) |
Philipp Reisner | 9868365 | 2012-11-09 14:18:43 +0100 | [diff] [blame] | 950 | max_bio_size = min(max_bio_size, DRBD_MAX_BIO_SIZE_P95); |
Philipp Reisner | 6809384 | 2011-06-30 15:43:06 +0200 | [diff] [blame] | 951 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 952 | p->d_size = cpu_to_be64(d_size); |
| 953 | p->u_size = cpu_to_be64(u_size); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 954 | p->c_size = cpu_to_be64(trigger_reply ? 0 : drbd_get_capacity(device->this_bdev)); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 955 | p->max_bio_size = cpu_to_be32(max_bio_size); |
| 956 | p->queue_order_type = cpu_to_be16(q_order_type); |
| 957 | p->dds_flags = cpu_to_be16(flags); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 958 | return drbd_send_command(peer_device, sock, P_SIZES, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 959 | } |
| 960 | |
| 961 | /** |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 962 | * drbd_send_current_state() - Sends the drbd state to the peer |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 963 | * @peer_device: DRBD peer device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 964 | */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 965 | int drbd_send_current_state(struct drbd_peer_device *peer_device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 966 | { |
Andreas Gruenbacher | 7c96715 | 2011-03-22 00:49:36 +0100 | [diff] [blame] | 967 | struct drbd_socket *sock; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 968 | struct p_state *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 969 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 970 | sock = &peer_device->connection->data; |
| 971 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 972 | if (!p) |
| 973 | return -EIO; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 974 | p->state = cpu_to_be32(peer_device->device->state.i); /* Within the send mutex */ |
| 975 | return drbd_send_command(peer_device, sock, P_STATE, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 976 | } |
| 977 | |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 978 | /** |
| 979 | * drbd_send_state() - After a state change, sends the new state to the peer |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 980 | * @peer_device: DRBD peer device. |
Philipp Reisner | 43de7c8 | 2011-11-10 13:16:13 +0100 | [diff] [blame] | 981 | * @state: the state to send, not necessarily the current state. |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 982 | * |
| 983 | * Each state change queues an "after_state_ch" work, which will eventually |
| 984 | * send the resulting new state to the peer. If more state changes happen |
| 985 | * between queuing and processing of the after_state_ch work, we still |
| 986 | * want to send each intermediary state in the order it occurred. |
| 987 | */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 988 | int drbd_send_state(struct drbd_peer_device *peer_device, union drbd_state state) |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 989 | { |
Philipp Reisner | 43de7c8 | 2011-11-10 13:16:13 +0100 | [diff] [blame] | 990 | struct drbd_socket *sock; |
| 991 | struct p_state *p; |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 992 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 993 | sock = &peer_device->connection->data; |
| 994 | p = drbd_prepare_command(peer_device, sock); |
Philipp Reisner | 43de7c8 | 2011-11-10 13:16:13 +0100 | [diff] [blame] | 995 | if (!p) |
| 996 | return -EIO; |
| 997 | p->state = cpu_to_be32(state.i); /* Within the send mutex */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 998 | return drbd_send_command(peer_device, sock, P_STATE, sizeof(*p), NULL, 0); |
Philipp Reisner | 43de7c8 | 2011-11-10 13:16:13 +0100 | [diff] [blame] | 999 | } |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 1000 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1001 | int drbd_send_state_req(struct drbd_peer_device *peer_device, union drbd_state mask, union drbd_state val) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1002 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1003 | struct drbd_socket *sock; |
| 1004 | struct p_req_state *p; |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 1005 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1006 | sock = &peer_device->connection->data; |
| 1007 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1008 | if (!p) |
| 1009 | return -EIO; |
| 1010 | p->mask = cpu_to_be32(mask.i); |
| 1011 | p->val = cpu_to_be32(val.i); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1012 | return drbd_send_command(peer_device, sock, P_STATE_CHG_REQ, sizeof(*p), NULL, 0); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1013 | } |
| 1014 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1015 | int conn_send_state_req(struct drbd_connection *connection, union drbd_state mask, union drbd_state val) |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1016 | { |
| 1017 | enum drbd_packet cmd; |
| 1018 | struct drbd_socket *sock; |
| 1019 | struct p_req_state *p; |
| 1020 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1021 | cmd = connection->agreed_pro_version < 100 ? P_STATE_CHG_REQ : P_CONN_ST_CHG_REQ; |
| 1022 | sock = &connection->data; |
| 1023 | p = conn_prepare_command(connection, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1024 | if (!p) |
| 1025 | return -EIO; |
| 1026 | p->mask = cpu_to_be32(mask.i); |
| 1027 | p->val = cpu_to_be32(val.i); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1028 | return conn_send_command(connection, sock, cmd, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1029 | } |
| 1030 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1031 | void drbd_send_sr_reply(struct drbd_peer_device *peer_device, enum drbd_state_rv retcode) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1032 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1033 | struct drbd_socket *sock; |
| 1034 | struct p_req_state_reply *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1035 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1036 | sock = &peer_device->connection->meta; |
| 1037 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1038 | if (p) { |
| 1039 | p->retcode = cpu_to_be32(retcode); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1040 | drbd_send_command(peer_device, sock, P_STATE_CHG_REPLY, sizeof(*p), NULL, 0); |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 1041 | } |
Lars Ellenberg | f479ea0 | 2011-10-27 16:52:30 +0200 | [diff] [blame] | 1042 | } |
| 1043 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1044 | void conn_send_sr_reply(struct drbd_connection *connection, enum drbd_state_rv retcode) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1045 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1046 | struct drbd_socket *sock; |
| 1047 | struct p_req_state_reply *p; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1048 | enum drbd_packet cmd = connection->agreed_pro_version < 100 ? P_STATE_CHG_REPLY : P_CONN_ST_CHG_REPLY; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1049 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1050 | sock = &connection->meta; |
| 1051 | p = conn_prepare_command(connection, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1052 | if (p) { |
| 1053 | p->retcode = cpu_to_be32(retcode); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1054 | conn_send_command(connection, sock, cmd, sizeof(*p), NULL, 0); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1055 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1056 | } |
| 1057 | |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1058 | static void dcbp_set_code(struct p_compressed_bm *p, enum drbd_bitmap_code code) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1059 | { |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1060 | BUG_ON(code & ~0xf); |
| 1061 | p->encoding = (p->encoding & ~0xf) | code; |
| 1062 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1063 | |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1064 | static void dcbp_set_start(struct p_compressed_bm *p, int set) |
| 1065 | { |
| 1066 | p->encoding = (p->encoding & ~0x80) | (set ? 0x80 : 0); |
| 1067 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1068 | |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1069 | static void dcbp_set_pad_bits(struct p_compressed_bm *p, int n) |
| 1070 | { |
| 1071 | BUG_ON(n & ~0x7); |
| 1072 | p->encoding = (p->encoding & (~0x7 << 4)) | (n << 4); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1073 | } |
| 1074 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1075 | static int fill_bitmap_rle_bits(struct drbd_device *device, |
Andreas Gruenbacher | 50d0b1a | 2011-03-30 11:53:51 +0200 | [diff] [blame] | 1076 | struct p_compressed_bm *p, |
| 1077 | unsigned int size, |
| 1078 | struct bm_xfer_ctx *c) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1079 | { |
| 1080 | struct bitstream bs; |
| 1081 | unsigned long plain_bits; |
| 1082 | unsigned long tmp; |
| 1083 | unsigned long rl; |
| 1084 | unsigned len; |
| 1085 | unsigned toggle; |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1086 | int bits, use_rle; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1087 | |
| 1088 | /* may we use this feature? */ |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1089 | rcu_read_lock(); |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1090 | use_rle = rcu_dereference(first_peer_device(device)->connection->net_conf)->use_rle; |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1091 | rcu_read_unlock(); |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1092 | if (!use_rle || first_peer_device(device)->connection->agreed_pro_version < 90) |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1093 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1094 | |
| 1095 | if (c->bit_offset >= c->bm_bits) |
| 1096 | return 0; /* nothing to do. */ |
| 1097 | |
| 1098 | /* use at most thus many bytes */ |
Andreas Gruenbacher | 50d0b1a | 2011-03-30 11:53:51 +0200 | [diff] [blame] | 1099 | bitstream_init(&bs, p->code, size, 0); |
| 1100 | memset(p->code, 0, size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1101 | /* plain bits covered in this code string */ |
| 1102 | plain_bits = 0; |
| 1103 | |
| 1104 | /* p->encoding & 0x80 stores whether the first run length is set. |
| 1105 | * bit offset is implicit. |
| 1106 | * start with toggle == 2 to be able to tell the first iteration */ |
| 1107 | toggle = 2; |
| 1108 | |
| 1109 | /* see how much plain bits we can stuff into one packet |
| 1110 | * using RLE and VLI. */ |
| 1111 | do { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1112 | tmp = (toggle == 0) ? _drbd_bm_find_next_zero(device, c->bit_offset) |
| 1113 | : _drbd_bm_find_next(device, c->bit_offset); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1114 | if (tmp == -1UL) |
| 1115 | tmp = c->bm_bits; |
| 1116 | rl = tmp - c->bit_offset; |
| 1117 | |
| 1118 | if (toggle == 2) { /* first iteration */ |
| 1119 | if (rl == 0) { |
| 1120 | /* the first checked bit was set, |
| 1121 | * store start value, */ |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1122 | dcbp_set_start(p, 1); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1123 | /* but skip encoding of zero run length */ |
| 1124 | toggle = !toggle; |
| 1125 | continue; |
| 1126 | } |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1127 | dcbp_set_start(p, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1128 | } |
| 1129 | |
| 1130 | /* paranoia: catch zero runlength. |
| 1131 | * can only happen if bitmap is modified while we scan it. */ |
| 1132 | if (rl == 0) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1133 | drbd_err(device, "unexpected zero runlength while encoding bitmap " |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1134 | "t:%u bo:%lu\n", toggle, c->bit_offset); |
| 1135 | return -1; |
| 1136 | } |
| 1137 | |
| 1138 | bits = vli_encode_bits(&bs, rl); |
| 1139 | if (bits == -ENOBUFS) /* buffer full */ |
| 1140 | break; |
| 1141 | if (bits <= 0) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1142 | drbd_err(device, "error while encoding bitmap: %d\n", bits); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1143 | return 0; |
| 1144 | } |
| 1145 | |
| 1146 | toggle = !toggle; |
| 1147 | plain_bits += rl; |
| 1148 | c->bit_offset = tmp; |
| 1149 | } while (c->bit_offset < c->bm_bits); |
| 1150 | |
| 1151 | len = bs.cur.b - p->code + !!bs.cur.bit; |
| 1152 | |
| 1153 | if (plain_bits < (len << 3)) { |
| 1154 | /* incompressible with this method. |
| 1155 | * we need to rewind both word and bit position. */ |
| 1156 | c->bit_offset -= plain_bits; |
| 1157 | bm_xfer_ctx_bit_to_word_offset(c); |
| 1158 | c->bit_offset = c->word_offset * BITS_PER_LONG; |
| 1159 | return 0; |
| 1160 | } |
| 1161 | |
| 1162 | /* RLE + VLI was able to compress it just fine. |
| 1163 | * update c->word_offset. */ |
| 1164 | bm_xfer_ctx_bit_to_word_offset(c); |
| 1165 | |
| 1166 | /* store pad_bits */ |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1167 | dcbp_set_pad_bits(p, (8 - bs.cur.bit) & 0x7); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1168 | |
| 1169 | return len; |
| 1170 | } |
| 1171 | |
Andreas Gruenbacher | f70af11 | 2010-12-11 18:51:50 +0100 | [diff] [blame] | 1172 | /** |
| 1173 | * send_bitmap_rle_or_plain |
| 1174 | * |
| 1175 | * Return 0 when done, 1 when another iteration is needed, and a negative error |
| 1176 | * code upon failure. |
| 1177 | */ |
| 1178 | static int |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1179 | send_bitmap_rle_or_plain(struct drbd_device *device, struct bm_xfer_ctx *c) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1180 | { |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1181 | struct drbd_socket *sock = &first_peer_device(device)->connection->data; |
| 1182 | unsigned int header_size = drbd_header_size(first_peer_device(device)->connection); |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 1183 | struct p_compressed_bm *p = sock->sbuf + header_size; |
Andreas Gruenbacher | a982dd5 | 2010-12-10 00:45:25 +0100 | [diff] [blame] | 1184 | int len, err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1185 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1186 | len = fill_bitmap_rle_bits(device, p, |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 1187 | DRBD_SOCKET_BUFFER_SIZE - header_size - sizeof(*p), c); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1188 | if (len < 0) |
Andreas Gruenbacher | f70af11 | 2010-12-11 18:51:50 +0100 | [diff] [blame] | 1189 | return -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1190 | |
| 1191 | if (len) { |
Andreas Gruenbacher | a02d124 | 2011-03-22 17:20:45 +0100 | [diff] [blame] | 1192 | dcbp_set_code(p, RLE_VLI_Bits); |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1193 | err = __send_command(first_peer_device(device)->connection, device->vnr, sock, |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1194 | P_COMPRESSED_BITMAP, sizeof(*p) + len, |
| 1195 | NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1196 | c->packets[0]++; |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 1197 | c->bytes[0] += header_size + sizeof(*p) + len; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1198 | |
| 1199 | if (c->bit_offset >= c->bm_bits) |
| 1200 | len = 0; /* DONE */ |
| 1201 | } else { |
| 1202 | /* was not compressible. |
| 1203 | * send a buffer full of plain text bits instead. */ |
Andreas Gruenbacher | 50d0b1a | 2011-03-30 11:53:51 +0200 | [diff] [blame] | 1204 | unsigned int data_size; |
| 1205 | unsigned long num_words; |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 1206 | unsigned long *p = sock->sbuf + header_size; |
Andreas Gruenbacher | 50d0b1a | 2011-03-30 11:53:51 +0200 | [diff] [blame] | 1207 | |
| 1208 | data_size = DRBD_SOCKET_BUFFER_SIZE - header_size; |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 1209 | num_words = min_t(size_t, data_size / sizeof(*p), |
Andreas Gruenbacher | 50d0b1a | 2011-03-30 11:53:51 +0200 | [diff] [blame] | 1210 | c->bm_words - c->word_offset); |
Andreas Gruenbacher | e658983 | 2011-03-30 12:54:42 +0200 | [diff] [blame] | 1211 | len = num_words * sizeof(*p); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1212 | if (len) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1213 | drbd_bm_get_lel(device, c->word_offset, num_words, p); |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1214 | err = __send_command(first_peer_device(device)->connection, device->vnr, sock, P_BITMAP, len, NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1215 | c->word_offset += num_words; |
| 1216 | c->bit_offset = c->word_offset * BITS_PER_LONG; |
| 1217 | |
| 1218 | c->packets[1]++; |
Andreas Gruenbacher | 50d0b1a | 2011-03-30 11:53:51 +0200 | [diff] [blame] | 1219 | c->bytes[1] += header_size + len; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1220 | |
| 1221 | if (c->bit_offset > c->bm_bits) |
| 1222 | c->bit_offset = c->bm_bits; |
| 1223 | } |
Andreas Gruenbacher | a982dd5 | 2010-12-10 00:45:25 +0100 | [diff] [blame] | 1224 | if (!err) { |
Andreas Gruenbacher | f70af11 | 2010-12-11 18:51:50 +0100 | [diff] [blame] | 1225 | if (len == 0) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1226 | INFO_bm_xfer_stats(device, "send", c); |
Andreas Gruenbacher | f70af11 | 2010-12-11 18:51:50 +0100 | [diff] [blame] | 1227 | return 0; |
| 1228 | } else |
| 1229 | return 1; |
| 1230 | } |
| 1231 | return -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1232 | } |
| 1233 | |
| 1234 | /* See the comment at receive_bitmap() */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1235 | static int _drbd_send_bitmap(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1236 | { |
| 1237 | struct bm_xfer_ctx c; |
Andreas Gruenbacher | f70af11 | 2010-12-11 18:51:50 +0100 | [diff] [blame] | 1238 | int err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1239 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1240 | if (!expect(device->bitmap)) |
Andreas Gruenbacher | 81e8465 | 2010-12-09 15:03:57 +0100 | [diff] [blame] | 1241 | return false; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1242 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1243 | if (get_ldev(device)) { |
| 1244 | if (drbd_md_test_flag(device->ldev, MDF_FULL_SYNC)) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1245 | drbd_info(device, "Writing the whole bitmap, MDF_FullSync was set.\n"); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1246 | drbd_bm_set_all(device); |
| 1247 | if (drbd_bm_write(device)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1248 | /* write_bm did fail! Leave full sync flag set in Meta P_DATA |
| 1249 | * but otherwise process as per normal - need to tell other |
| 1250 | * side that a full resync is required! */ |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1251 | drbd_err(device, "Failed to write bitmap to disk!\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1252 | } else { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1253 | drbd_md_clear_flag(device, MDF_FULL_SYNC); |
| 1254 | drbd_md_sync(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1255 | } |
| 1256 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1257 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1258 | } |
| 1259 | |
| 1260 | c = (struct bm_xfer_ctx) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1261 | .bm_bits = drbd_bm_bits(device), |
| 1262 | .bm_words = drbd_bm_words(device), |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1263 | }; |
| 1264 | |
| 1265 | do { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1266 | err = send_bitmap_rle_or_plain(device, &c); |
Andreas Gruenbacher | f70af11 | 2010-12-11 18:51:50 +0100 | [diff] [blame] | 1267 | } while (err > 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1268 | |
Andreas Gruenbacher | f70af11 | 2010-12-11 18:51:50 +0100 | [diff] [blame] | 1269 | return err == 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1270 | } |
| 1271 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1272 | int drbd_send_bitmap(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1273 | { |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1274 | struct drbd_socket *sock = &first_peer_device(device)->connection->data; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1275 | int err = -1; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1276 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1277 | mutex_lock(&sock->mutex); |
| 1278 | if (sock->socket) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1279 | err = !_drbd_send_bitmap(device); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1280 | mutex_unlock(&sock->mutex); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1281 | return err; |
| 1282 | } |
| 1283 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1284 | void drbd_send_b_ack(struct drbd_connection *connection, u32 barrier_nr, u32 set_size) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1285 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1286 | struct drbd_socket *sock; |
| 1287 | struct p_barrier_ack *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1288 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1289 | if (connection->cstate < C_WF_REPORT_PARAMS) |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1290 | return; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1291 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1292 | sock = &connection->meta; |
| 1293 | p = conn_prepare_command(connection, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1294 | if (!p) |
| 1295 | return; |
| 1296 | p->barrier = barrier_nr; |
| 1297 | p->set_size = cpu_to_be32(set_size); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1298 | conn_send_command(connection, sock, P_BARRIER_ACK, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1299 | } |
| 1300 | |
| 1301 | /** |
| 1302 | * _drbd_send_ack() - Sends an ack packet |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1303 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1304 | * @cmd: Packet command code. |
| 1305 | * @sector: sector, needs to be in big endian byte order |
| 1306 | * @blksize: size in byte, needs to be in big endian byte order |
| 1307 | * @block_id: Id, big endian byte order |
| 1308 | */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1309 | static int _drbd_send_ack(struct drbd_peer_device *peer_device, enum drbd_packet cmd, |
Andreas Gruenbacher | d876302 | 2011-01-26 17:39:41 +0100 | [diff] [blame] | 1310 | u64 sector, u32 blksize, u64 block_id) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1311 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1312 | struct drbd_socket *sock; |
| 1313 | struct p_block_ack *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1314 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1315 | if (peer_device->device->state.conn < C_CONNECTED) |
Andreas Gruenbacher | a8c32aa | 2011-03-16 01:27:22 +0100 | [diff] [blame] | 1316 | return -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1317 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1318 | sock = &peer_device->connection->meta; |
| 1319 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1320 | if (!p) |
| 1321 | return -EIO; |
| 1322 | p->sector = sector; |
| 1323 | p->block_id = block_id; |
| 1324 | p->blksize = blksize; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1325 | p->seq_num = cpu_to_be32(atomic_inc_return(&peer_device->device->packet_seq)); |
| 1326 | return drbd_send_command(peer_device, sock, cmd, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1327 | } |
| 1328 | |
Lars Ellenberg | 2b2bf21 | 2010-10-06 11:46:55 +0200 | [diff] [blame] | 1329 | /* dp->sector and dp->block_id already/still in network byte order, |
| 1330 | * data_size is payload size according to dp->head, |
| 1331 | * and may need to be corrected for digest size. */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1332 | void drbd_send_ack_dp(struct drbd_peer_device *peer_device, enum drbd_packet cmd, |
Andreas Gruenbacher | a9a9994 | 2011-03-16 01:30:14 +0100 | [diff] [blame] | 1333 | struct p_data *dp, int data_size) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1334 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1335 | if (peer_device->connection->peer_integrity_tfm) |
| 1336 | data_size -= crypto_hash_digestsize(peer_device->connection->peer_integrity_tfm); |
| 1337 | _drbd_send_ack(peer_device, cmd, dp->sector, cpu_to_be32(data_size), |
Andreas Gruenbacher | a9a9994 | 2011-03-16 01:30:14 +0100 | [diff] [blame] | 1338 | dp->block_id); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1339 | } |
| 1340 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1341 | void drbd_send_ack_rp(struct drbd_peer_device *peer_device, enum drbd_packet cmd, |
Andreas Gruenbacher | a9a9994 | 2011-03-16 01:30:14 +0100 | [diff] [blame] | 1342 | struct p_block_req *rp) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1343 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1344 | _drbd_send_ack(peer_device, cmd, rp->sector, rp->blksize, rp->block_id); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1345 | } |
| 1346 | |
| 1347 | /** |
| 1348 | * drbd_send_ack() - Sends an ack packet |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1349 | * @device: DRBD device |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1350 | * @cmd: packet command code |
| 1351 | * @peer_req: peer request |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1352 | */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1353 | int drbd_send_ack(struct drbd_peer_device *peer_device, enum drbd_packet cmd, |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1354 | struct drbd_peer_request *peer_req) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1355 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1356 | return _drbd_send_ack(peer_device, cmd, |
Andreas Gruenbacher | dd51612 | 2011-03-16 15:39:08 +0100 | [diff] [blame] | 1357 | cpu_to_be64(peer_req->i.sector), |
| 1358 | cpu_to_be32(peer_req->i.size), |
| 1359 | peer_req->block_id); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1360 | } |
| 1361 | |
| 1362 | /* This function misuses the block_id field to signal if the blocks |
| 1363 | * are is sync or not. */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1364 | int drbd_send_ack_ex(struct drbd_peer_device *peer_device, enum drbd_packet cmd, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1365 | sector_t sector, int blksize, u64 block_id) |
| 1366 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1367 | return _drbd_send_ack(peer_device, cmd, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1368 | cpu_to_be64(sector), |
| 1369 | cpu_to_be32(blksize), |
| 1370 | cpu_to_be64(block_id)); |
| 1371 | } |
| 1372 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1373 | int drbd_send_drequest(struct drbd_peer_device *peer_device, int cmd, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1374 | sector_t sector, int size, u64 block_id) |
| 1375 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1376 | struct drbd_socket *sock; |
| 1377 | struct p_block_req *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1378 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1379 | sock = &peer_device->connection->data; |
| 1380 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1381 | if (!p) |
| 1382 | return -EIO; |
| 1383 | p->sector = cpu_to_be64(sector); |
| 1384 | p->block_id = block_id; |
| 1385 | p->blksize = cpu_to_be32(size); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1386 | return drbd_send_command(peer_device, sock, cmd, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1387 | } |
| 1388 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1389 | int drbd_send_drequest_csum(struct drbd_peer_device *peer_device, sector_t sector, int size, |
Andreas Gruenbacher | d876302 | 2011-01-26 17:39:41 +0100 | [diff] [blame] | 1390 | void *digest, int digest_size, enum drbd_packet cmd) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1391 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1392 | struct drbd_socket *sock; |
| 1393 | struct p_block_req *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1394 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1395 | /* FIXME: Put the digest into the preallocated socket buffer. */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1396 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1397 | sock = &peer_device->connection->data; |
| 1398 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1399 | if (!p) |
| 1400 | return -EIO; |
| 1401 | p->sector = cpu_to_be64(sector); |
| 1402 | p->block_id = ID_SYNCER /* unused */; |
| 1403 | p->blksize = cpu_to_be32(size); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1404 | return drbd_send_command(peer_device, sock, cmd, sizeof(*p), digest, digest_size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1405 | } |
| 1406 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1407 | int drbd_send_ov_request(struct drbd_peer_device *peer_device, sector_t sector, int size) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1408 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1409 | struct drbd_socket *sock; |
| 1410 | struct p_block_req *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1411 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1412 | sock = &peer_device->connection->data; |
| 1413 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1414 | if (!p) |
| 1415 | return -EIO; |
| 1416 | p->sector = cpu_to_be64(sector); |
| 1417 | p->block_id = ID_SYNCER /* unused */; |
| 1418 | p->blksize = cpu_to_be32(size); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1419 | return drbd_send_command(peer_device, sock, P_OV_REQUEST, sizeof(*p), NULL, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1420 | } |
| 1421 | |
| 1422 | /* called on sndtimeo |
Andreas Gruenbacher | 81e8465 | 2010-12-09 15:03:57 +0100 | [diff] [blame] | 1423 | * returns false if we should retry, |
| 1424 | * true if we think connection is dead |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1425 | */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1426 | static int we_should_drop_the_connection(struct drbd_connection *connection, struct socket *sock) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1427 | { |
| 1428 | int drop_it; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1429 | /* long elapsed = (long)(jiffies - device->last_received); */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1430 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1431 | drop_it = connection->meta.socket == sock |
| 1432 | || !connection->asender.task |
| 1433 | || get_t_state(&connection->asender) != RUNNING |
| 1434 | || connection->cstate < C_WF_REPORT_PARAMS; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1435 | |
| 1436 | if (drop_it) |
Andreas Gruenbacher | 81e8465 | 2010-12-09 15:03:57 +0100 | [diff] [blame] | 1437 | return true; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1438 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1439 | drop_it = !--connection->ko_count; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1440 | if (!drop_it) { |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 1441 | drbd_err(connection, "[%s/%d] sock_sendmsg time expired, ko = %u\n", |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1442 | current->comm, current->pid, connection->ko_count); |
| 1443 | request_ping(connection); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1444 | } |
| 1445 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1446 | return drop_it; /* && (device->state == R_PRIMARY) */; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1447 | } |
| 1448 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1449 | static void drbd_update_congested(struct drbd_connection *connection) |
Andreas Gruenbacher | 9e204cd | 2011-01-26 18:45:11 +0100 | [diff] [blame] | 1450 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1451 | struct sock *sk = connection->data.socket->sk; |
Andreas Gruenbacher | 9e204cd | 2011-01-26 18:45:11 +0100 | [diff] [blame] | 1452 | if (sk->sk_wmem_queued > sk->sk_sndbuf * 4 / 5) |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1453 | set_bit(NET_CONGESTED, &connection->flags); |
Andreas Gruenbacher | 9e204cd | 2011-01-26 18:45:11 +0100 | [diff] [blame] | 1454 | } |
| 1455 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1456 | /* The idea of sendpage seems to be to put some kind of reference |
| 1457 | * to the page into the skb, and to hand it over to the NIC. In |
| 1458 | * this process get_page() gets called. |
| 1459 | * |
| 1460 | * As soon as the page was really sent over the network put_page() |
| 1461 | * gets called by some part of the network layer. [ NIC driver? ] |
| 1462 | * |
| 1463 | * [ get_page() / put_page() increment/decrement the count. If count |
| 1464 | * reaches 0 the page will be freed. ] |
| 1465 | * |
| 1466 | * This works nicely with pages from FSs. |
| 1467 | * But this means that in protocol A we might signal IO completion too early! |
| 1468 | * |
| 1469 | * In order not to corrupt data during a resync we must make sure |
| 1470 | * that we do not reuse our own buffer pages (EEs) to early, therefore |
| 1471 | * we have the net_ee list. |
| 1472 | * |
| 1473 | * XFS seems to have problems, still, it submits pages with page_count == 0! |
| 1474 | * As a workaround, we disable sendpage on pages |
| 1475 | * with page_count == 0 or PageSlab. |
| 1476 | */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1477 | static int _drbd_no_send_page(struct drbd_peer_device *peer_device, struct page *page, |
Andreas Gruenbacher | b987427 | 2011-03-16 09:41:10 +0100 | [diff] [blame] | 1478 | int offset, size_t size, unsigned msg_flags) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1479 | { |
Andreas Gruenbacher | b987427 | 2011-03-16 09:41:10 +0100 | [diff] [blame] | 1480 | struct socket *socket; |
| 1481 | void *addr; |
| 1482 | int err; |
| 1483 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1484 | socket = peer_device->connection->data.socket; |
Andreas Gruenbacher | b987427 | 2011-03-16 09:41:10 +0100 | [diff] [blame] | 1485 | addr = kmap(page) + offset; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1486 | err = drbd_send_all(peer_device->connection, socket, addr, size, msg_flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1487 | kunmap(page); |
Andreas Gruenbacher | b987427 | 2011-03-16 09:41:10 +0100 | [diff] [blame] | 1488 | if (!err) |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1489 | peer_device->device->send_cnt += size >> 9; |
Andreas Gruenbacher | b987427 | 2011-03-16 09:41:10 +0100 | [diff] [blame] | 1490 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1491 | } |
| 1492 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1493 | static int _drbd_send_page(struct drbd_peer_device *peer_device, struct page *page, |
Lars Ellenberg | ba11ad9 | 2010-05-25 16:26:16 +0200 | [diff] [blame] | 1494 | int offset, size_t size, unsigned msg_flags) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1495 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1496 | struct socket *socket = peer_device->connection->data.socket; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1497 | mm_segment_t oldfs = get_fs(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1498 | int len = size; |
Andreas Gruenbacher | 88b390f | 2011-03-16 10:44:16 +0100 | [diff] [blame] | 1499 | int err = -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1500 | |
| 1501 | /* e.g. XFS meta- & log-data is in slab pages, which have a |
| 1502 | * page_count of 0 and/or have PageSlab() set. |
| 1503 | * we cannot use send_page for those, as that does get_page(); |
| 1504 | * put_page(); and would cause either a VM_BUG directly, or |
| 1505 | * __page_cache_release a page that would actually still be referenced |
| 1506 | * by someone, leading to some obscure delayed Oops somewhere else. */ |
| 1507 | if (disable_sendpage || (page_count(page) < 1) || PageSlab(page)) |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1508 | return _drbd_no_send_page(peer_device, page, offset, size, msg_flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1509 | |
Lars Ellenberg | ba11ad9 | 2010-05-25 16:26:16 +0200 | [diff] [blame] | 1510 | msg_flags |= MSG_NOSIGNAL; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1511 | drbd_update_congested(peer_device->connection); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1512 | set_fs(KERNEL_DS); |
| 1513 | do { |
Andreas Gruenbacher | 88b390f | 2011-03-16 10:44:16 +0100 | [diff] [blame] | 1514 | int sent; |
| 1515 | |
| 1516 | sent = socket->ops->sendpage(socket, page, offset, len, msg_flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1517 | if (sent <= 0) { |
Andreas Gruenbacher | 88b390f | 2011-03-16 10:44:16 +0100 | [diff] [blame] | 1518 | if (sent == -EAGAIN) { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1519 | if (we_should_drop_the_connection(peer_device->connection, socket)) |
Andreas Gruenbacher | 88b390f | 2011-03-16 10:44:16 +0100 | [diff] [blame] | 1520 | break; |
| 1521 | continue; |
| 1522 | } |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1523 | drbd_warn(peer_device->device, "%s: size=%d len=%d sent=%d\n", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1524 | __func__, (int)size, len, sent); |
Andreas Gruenbacher | 88b390f | 2011-03-16 10:44:16 +0100 | [diff] [blame] | 1525 | if (sent < 0) |
| 1526 | err = sent; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1527 | break; |
| 1528 | } |
| 1529 | len -= sent; |
| 1530 | offset += sent; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1531 | } while (len > 0 /* THINK && device->cstate >= C_CONNECTED*/); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1532 | set_fs(oldfs); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1533 | clear_bit(NET_CONGESTED, &peer_device->connection->flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1534 | |
Andreas Gruenbacher | 88b390f | 2011-03-16 10:44:16 +0100 | [diff] [blame] | 1535 | if (len == 0) { |
| 1536 | err = 0; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1537 | peer_device->device->send_cnt += size >> 9; |
Andreas Gruenbacher | 88b390f | 2011-03-16 10:44:16 +0100 | [diff] [blame] | 1538 | } |
| 1539 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1540 | } |
| 1541 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1542 | static int _drbd_send_bio(struct drbd_peer_device *peer_device, struct bio *bio) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1543 | { |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 1544 | struct bio_vec bvec; |
| 1545 | struct bvec_iter iter; |
| 1546 | |
Lars Ellenberg | ba11ad9 | 2010-05-25 16:26:16 +0200 | [diff] [blame] | 1547 | /* hint all but last page with MSG_MORE */ |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 1548 | bio_for_each_segment(bvec, bio, iter) { |
Andreas Gruenbacher | 7fae55d | 2011-03-16 11:46:33 +0100 | [diff] [blame] | 1549 | int err; |
| 1550 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1551 | err = _drbd_no_send_page(peer_device, bvec.bv_page, |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 1552 | bvec.bv_offset, bvec.bv_len, |
Kent Overstreet | 4550dd6 | 2013-08-07 14:26:21 -0700 | [diff] [blame] | 1553 | bio_iter_last(bvec, iter) |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 1554 | ? 0 : MSG_MORE); |
Andreas Gruenbacher | 7fae55d | 2011-03-16 11:46:33 +0100 | [diff] [blame] | 1555 | if (err) |
| 1556 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1557 | } |
Andreas Gruenbacher | 7fae55d | 2011-03-16 11:46:33 +0100 | [diff] [blame] | 1558 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1559 | } |
| 1560 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1561 | static int _drbd_send_zc_bio(struct drbd_peer_device *peer_device, struct bio *bio) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1562 | { |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 1563 | struct bio_vec bvec; |
| 1564 | struct bvec_iter iter; |
| 1565 | |
Lars Ellenberg | ba11ad9 | 2010-05-25 16:26:16 +0200 | [diff] [blame] | 1566 | /* hint all but last page with MSG_MORE */ |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 1567 | bio_for_each_segment(bvec, bio, iter) { |
Andreas Gruenbacher | 7fae55d | 2011-03-16 11:46:33 +0100 | [diff] [blame] | 1568 | int err; |
| 1569 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1570 | err = _drbd_send_page(peer_device, bvec.bv_page, |
Kent Overstreet | 7988613 | 2013-11-23 17:19:00 -0800 | [diff] [blame] | 1571 | bvec.bv_offset, bvec.bv_len, |
Kent Overstreet | 4550dd6 | 2013-08-07 14:26:21 -0700 | [diff] [blame] | 1572 | bio_iter_last(bvec, iter) ? 0 : MSG_MORE); |
Andreas Gruenbacher | 7fae55d | 2011-03-16 11:46:33 +0100 | [diff] [blame] | 1573 | if (err) |
| 1574 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1575 | } |
Andreas Gruenbacher | 7fae55d | 2011-03-16 11:46:33 +0100 | [diff] [blame] | 1576 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1577 | } |
| 1578 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1579 | static int _drbd_send_zc_ee(struct drbd_peer_device *peer_device, |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1580 | struct drbd_peer_request *peer_req) |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 1581 | { |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1582 | struct page *page = peer_req->pages; |
| 1583 | unsigned len = peer_req->i.size; |
Andreas Gruenbacher | 9f69230 | 2011-03-16 10:49:09 +0100 | [diff] [blame] | 1584 | int err; |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1585 | |
Lars Ellenberg | ba11ad9 | 2010-05-25 16:26:16 +0200 | [diff] [blame] | 1586 | /* hint all but last page with MSG_MORE */ |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 1587 | page_chain_for_each(page) { |
| 1588 | unsigned l = min_t(unsigned, len, PAGE_SIZE); |
Andreas Gruenbacher | 9f69230 | 2011-03-16 10:49:09 +0100 | [diff] [blame] | 1589 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1590 | err = _drbd_send_page(peer_device, page, 0, l, |
Andreas Gruenbacher | 9f69230 | 2011-03-16 10:49:09 +0100 | [diff] [blame] | 1591 | page_chain_next(page) ? MSG_MORE : 0); |
| 1592 | if (err) |
| 1593 | return err; |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 1594 | len -= l; |
| 1595 | } |
Andreas Gruenbacher | 9f69230 | 2011-03-16 10:49:09 +0100 | [diff] [blame] | 1596 | return 0; |
Lars Ellenberg | 45bb912 | 2010-05-14 17:10:48 +0200 | [diff] [blame] | 1597 | } |
| 1598 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1599 | static u32 bio_flags_to_wire(struct drbd_connection *connection, unsigned long bi_rw) |
Philipp Reisner | 76d2e7e | 2010-08-25 11:58:05 +0200 | [diff] [blame] | 1600 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1601 | if (connection->agreed_pro_version >= 95) |
Philipp Reisner | 76d2e7e | 2010-08-25 11:58:05 +0200 | [diff] [blame] | 1602 | return (bi_rw & REQ_SYNC ? DP_RW_SYNC : 0) | |
Philipp Reisner | 76d2e7e | 2010-08-25 11:58:05 +0200 | [diff] [blame] | 1603 | (bi_rw & REQ_FUA ? DP_FUA : 0) | |
| 1604 | (bi_rw & REQ_FLUSH ? DP_FLUSH : 0) | |
| 1605 | (bi_rw & REQ_DISCARD ? DP_DISCARD : 0); |
| 1606 | else |
Jens Axboe | 721a960 | 2011-03-09 11:56:30 +0100 | [diff] [blame] | 1607 | return bi_rw & REQ_SYNC ? DP_RW_SYNC : 0; |
Philipp Reisner | 76d2e7e | 2010-08-25 11:58:05 +0200 | [diff] [blame] | 1608 | } |
| 1609 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1610 | /* Used to send write requests |
| 1611 | * R_PRIMARY -> Peer (P_DATA) |
| 1612 | */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1613 | int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request *req) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1614 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1615 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1616 | struct drbd_socket *sock; |
| 1617 | struct p_data *p; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1618 | unsigned int dp_flags = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1619 | int dgs; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1620 | int err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1621 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1622 | sock = &peer_device->connection->data; |
| 1623 | p = drbd_prepare_command(peer_device, sock); |
| 1624 | dgs = peer_device->connection->integrity_tfm ? |
| 1625 | crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1626 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1627 | if (!p) |
| 1628 | return -EIO; |
| 1629 | p->sector = cpu_to_be64(req->i.sector); |
| 1630 | p->block_id = (unsigned long)req; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1631 | p->seq_num = cpu_to_be32(atomic_inc_return(&device->packet_seq)); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1632 | dp_flags = bio_flags_to_wire(peer_device->connection, req->master_bio->bi_rw); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1633 | if (device->state.conn >= C_SYNC_SOURCE && |
| 1634 | device->state.conn <= C_PAUSED_SYNC_T) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1635 | dp_flags |= DP_MAY_SET_IN_SYNC; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1636 | if (peer_device->connection->agreed_pro_version >= 100) { |
Philipp Reisner | 303d144 | 2011-04-13 16:24:47 -0700 | [diff] [blame] | 1637 | if (req->rq_state & RQ_EXP_RECEIVE_ACK) |
| 1638 | dp_flags |= DP_SEND_RECEIVE_ACK; |
| 1639 | if (req->rq_state & RQ_EXP_WRITE_ACK) |
| 1640 | dp_flags |= DP_SEND_WRITE_ACK; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1641 | } |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1642 | p->dp_flags = cpu_to_be32(dp_flags); |
| 1643 | if (dgs) |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1644 | drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, p + 1); |
| 1645 | err = __send_command(peer_device->connection, device->vnr, sock, P_DATA, sizeof(*p) + dgs, NULL, req->i.size); |
Andreas Gruenbacher | 6bdb9b0 | 2011-03-16 11:52:58 +0100 | [diff] [blame] | 1646 | if (!err) { |
Lars Ellenberg | 470be44 | 2010-11-10 10:36:52 +0100 | [diff] [blame] | 1647 | /* For protocol A, we have to memcpy the payload into |
| 1648 | * socket buffers, as we may complete right away |
| 1649 | * as soon as we handed it over to tcp, at which point the data |
| 1650 | * pages may become invalid. |
| 1651 | * |
| 1652 | * For data-integrity enabled, we copy it as well, so we can be |
| 1653 | * sure that even if the bio pages may still be modified, it |
| 1654 | * won't change the data on the wire, thus if the digest checks |
| 1655 | * out ok after sending on this side, but does not fit on the |
| 1656 | * receiving side, we sure have detected corruption elsewhere. |
| 1657 | */ |
Philipp Reisner | 303d144 | 2011-04-13 16:24:47 -0700 | [diff] [blame] | 1658 | if (!(req->rq_state & (RQ_EXP_RECEIVE_ACK | RQ_EXP_WRITE_ACK)) || dgs) |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1659 | err = _drbd_send_bio(peer_device, req->master_bio); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1660 | else |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1661 | err = _drbd_send_zc_bio(peer_device, req->master_bio); |
Lars Ellenberg | 470be44 | 2010-11-10 10:36:52 +0100 | [diff] [blame] | 1662 | |
| 1663 | /* double check digest, sometimes buffers have been modified in flight. */ |
| 1664 | if (dgs > 0 && dgs <= 64) { |
Bart Van Assche | 24c4830 | 2011-05-21 18:32:29 +0200 | [diff] [blame] | 1665 | /* 64 byte, 512 bit, is the largest digest size |
Lars Ellenberg | 470be44 | 2010-11-10 10:36:52 +0100 | [diff] [blame] | 1666 | * currently supported in kernel crypto. */ |
| 1667 | unsigned char digest[64]; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1668 | drbd_csum_bio(peer_device->connection->integrity_tfm, req->master_bio, digest); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1669 | if (memcmp(p + 1, digest, dgs)) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1670 | drbd_warn(device, |
Lars Ellenberg | 470be44 | 2010-11-10 10:36:52 +0100 | [diff] [blame] | 1671 | "Digest mismatch, buffer modified by upper layers during write: %llus +%u\n", |
Andreas Gruenbacher | ace652a | 2011-01-03 17:09:58 +0100 | [diff] [blame] | 1672 | (unsigned long long)req->i.sector, req->i.size); |
Lars Ellenberg | 470be44 | 2010-11-10 10:36:52 +0100 | [diff] [blame] | 1673 | } |
| 1674 | } /* else if (dgs > 64) { |
| 1675 | ... Be noisy about digest too large ... |
| 1676 | } */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1677 | } |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1678 | mutex_unlock(&sock->mutex); /* locked by drbd_prepare_command() */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1679 | |
Andreas Gruenbacher | 6bdb9b0 | 2011-03-16 11:52:58 +0100 | [diff] [blame] | 1680 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1681 | } |
| 1682 | |
| 1683 | /* answer packet, used to send data back for read requests: |
| 1684 | * Peer -> (diskless) R_PRIMARY (P_DATA_REPLY) |
| 1685 | * C_SYNC_SOURCE -> C_SYNC_TARGET (P_RS_DATA_REPLY) |
| 1686 | */ |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1687 | int drbd_send_block(struct drbd_peer_device *peer_device, enum drbd_packet cmd, |
Andreas Gruenbacher | db830c4 | 2011-02-04 15:57:48 +0100 | [diff] [blame] | 1688 | struct drbd_peer_request *peer_req) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1689 | { |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1690 | struct drbd_device *device = peer_device->device; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1691 | struct drbd_socket *sock; |
| 1692 | struct p_data *p; |
Andreas Gruenbacher | 7b57b89d | 2011-03-16 11:35:20 +0100 | [diff] [blame] | 1693 | int err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1694 | int dgs; |
| 1695 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1696 | sock = &peer_device->connection->data; |
| 1697 | p = drbd_prepare_command(peer_device, sock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1698 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1699 | dgs = peer_device->connection->integrity_tfm ? |
| 1700 | crypto_hash_digestsize(peer_device->connection->integrity_tfm) : 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1701 | |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1702 | if (!p) |
| 1703 | return -EIO; |
| 1704 | p->sector = cpu_to_be64(peer_req->i.sector); |
| 1705 | p->block_id = peer_req->block_id; |
| 1706 | p->seq_num = 0; /* unused */ |
Lars Ellenberg | b17f33c | 2012-02-08 15:32:51 +0100 | [diff] [blame] | 1707 | p->dp_flags = 0; |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1708 | if (dgs) |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1709 | drbd_csum_ee(peer_device->connection->integrity_tfm, peer_req, p + 1); |
| 1710 | err = __send_command(peer_device->connection, device->vnr, sock, cmd, sizeof(*p) + dgs, NULL, peer_req->i.size); |
Andreas Gruenbacher | 7b57b89d | 2011-03-16 11:35:20 +0100 | [diff] [blame] | 1711 | if (!err) |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1712 | err = _drbd_send_zc_ee(peer_device, peer_req); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1713 | mutex_unlock(&sock->mutex); /* locked by drbd_prepare_command() */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1714 | |
Andreas Gruenbacher | 7b57b89d | 2011-03-16 11:35:20 +0100 | [diff] [blame] | 1715 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1716 | } |
| 1717 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1718 | int drbd_send_out_of_sync(struct drbd_peer_device *peer_device, struct drbd_request *req) |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1719 | { |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1720 | struct drbd_socket *sock; |
| 1721 | struct p_block_desc *p; |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1722 | |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1723 | sock = &peer_device->connection->data; |
| 1724 | p = drbd_prepare_command(peer_device, sock); |
Andreas Gruenbacher | 9f5bdc3 | 2011-03-28 14:23:08 +0200 | [diff] [blame] | 1725 | if (!p) |
| 1726 | return -EIO; |
| 1727 | p->sector = cpu_to_be64(req->i.sector); |
| 1728 | p->blksize = cpu_to_be32(req->i.size); |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 1729 | return drbd_send_command(peer_device, sock, P_OUT_OF_SYNC, sizeof(*p), NULL, 0); |
Philipp Reisner | 73a01a1 | 2010-10-27 14:33:00 +0200 | [diff] [blame] | 1730 | } |
| 1731 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1732 | /* |
| 1733 | drbd_send distinguishes two cases: |
| 1734 | |
| 1735 | Packets sent via the data socket "sock" |
| 1736 | and packets sent via the meta data socket "msock" |
| 1737 | |
| 1738 | sock msock |
| 1739 | -----------------+-------------------------+------------------------------ |
| 1740 | timeout conf.timeout / 2 conf.timeout / 2 |
| 1741 | timeout action send a ping via msock Abort communication |
| 1742 | and close all sockets |
| 1743 | */ |
| 1744 | |
| 1745 | /* |
| 1746 | * you must have down()ed the appropriate [m]sock_mutex elsewhere! |
| 1747 | */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1748 | int drbd_send(struct drbd_connection *connection, struct socket *sock, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1749 | void *buf, size_t size, unsigned msg_flags) |
| 1750 | { |
| 1751 | struct kvec iov; |
| 1752 | struct msghdr msg; |
| 1753 | int rv, sent = 0; |
| 1754 | |
| 1755 | if (!sock) |
Andreas Gruenbacher | c0d42c8 | 2010-12-09 23:52:22 +0100 | [diff] [blame] | 1756 | return -EBADR; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1757 | |
| 1758 | /* THINK if (signal_pending) return ... ? */ |
| 1759 | |
| 1760 | iov.iov_base = buf; |
| 1761 | iov.iov_len = size; |
| 1762 | |
| 1763 | msg.msg_name = NULL; |
| 1764 | msg.msg_namelen = 0; |
| 1765 | msg.msg_control = NULL; |
| 1766 | msg.msg_controllen = 0; |
| 1767 | msg.msg_flags = msg_flags | MSG_NOSIGNAL; |
| 1768 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1769 | if (sock == connection->data.socket) { |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1770 | rcu_read_lock(); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1771 | connection->ko_count = rcu_dereference(connection->net_conf)->ko_count; |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 1772 | rcu_read_unlock(); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1773 | drbd_update_congested(connection); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1774 | } |
| 1775 | do { |
| 1776 | /* STRANGE |
| 1777 | * tcp_sendmsg does _not_ use its size parameter at all ? |
| 1778 | * |
| 1779 | * -EAGAIN on timeout, -EINTR on signal. |
| 1780 | */ |
| 1781 | /* THINK |
| 1782 | * do we need to block DRBD_SIG if sock == &meta.socket ?? |
| 1783 | * otherwise wake_asender() might interrupt some send_*Ack ! |
| 1784 | */ |
| 1785 | rv = kernel_sendmsg(sock, &msg, &iov, 1, size); |
| 1786 | if (rv == -EAGAIN) { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1787 | if (we_should_drop_the_connection(connection, sock)) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1788 | break; |
| 1789 | else |
| 1790 | continue; |
| 1791 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1792 | if (rv == -EINTR) { |
| 1793 | flush_signals(current); |
| 1794 | rv = 0; |
| 1795 | } |
| 1796 | if (rv < 0) |
| 1797 | break; |
| 1798 | sent += rv; |
| 1799 | iov.iov_base += rv; |
| 1800 | iov.iov_len -= rv; |
| 1801 | } while (sent < size); |
| 1802 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1803 | if (sock == connection->data.socket) |
| 1804 | clear_bit(NET_CONGESTED, &connection->flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1805 | |
| 1806 | if (rv <= 0) { |
| 1807 | if (rv != -EAGAIN) { |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 1808 | drbd_err(connection, "%s_sendmsg returned %d\n", |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1809 | sock == connection->meta.socket ? "msock" : "sock", |
Philipp Reisner | bedbd2a | 2011-02-07 15:08:48 +0100 | [diff] [blame] | 1810 | rv); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1811 | conn_request_state(connection, NS(conn, C_BROKEN_PIPE), CS_HARD); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1812 | } else |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1813 | conn_request_state(connection, NS(conn, C_TIMEOUT), CS_HARD); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1814 | } |
| 1815 | |
| 1816 | return sent; |
| 1817 | } |
| 1818 | |
Andreas Gruenbacher | fb708e4 | 2010-12-15 17:04:36 +0100 | [diff] [blame] | 1819 | /** |
| 1820 | * drbd_send_all - Send an entire buffer |
| 1821 | * |
| 1822 | * Returns 0 upon success and a negative error value otherwise. |
| 1823 | */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1824 | int drbd_send_all(struct drbd_connection *connection, struct socket *sock, void *buffer, |
Andreas Gruenbacher | fb708e4 | 2010-12-15 17:04:36 +0100 | [diff] [blame] | 1825 | size_t size, unsigned msg_flags) |
| 1826 | { |
| 1827 | int err; |
| 1828 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 1829 | err = drbd_send(connection, sock, buffer, size, msg_flags); |
Andreas Gruenbacher | fb708e4 | 2010-12-15 17:04:36 +0100 | [diff] [blame] | 1830 | if (err < 0) |
| 1831 | return err; |
| 1832 | if (err != size) |
| 1833 | return -EIO; |
| 1834 | return 0; |
| 1835 | } |
| 1836 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1837 | static int drbd_open(struct block_device *bdev, fmode_t mode) |
| 1838 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1839 | struct drbd_device *device = bdev->bd_disk->private_data; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1840 | unsigned long flags; |
| 1841 | int rv = 0; |
| 1842 | |
Arnd Bergmann | 2a48fc0 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1843 | mutex_lock(&drbd_main_mutex); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 1844 | spin_lock_irqsave(&device->resource->req_lock, flags); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1845 | /* to have a stable device->state.role |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1846 | * and no race with updating open_cnt */ |
| 1847 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1848 | if (device->state.role != R_PRIMARY) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1849 | if (mode & FMODE_WRITE) |
| 1850 | rv = -EROFS; |
| 1851 | else if (!allow_oos) |
| 1852 | rv = -EMEDIUMTYPE; |
| 1853 | } |
| 1854 | |
| 1855 | if (!rv) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1856 | device->open_cnt++; |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 1857 | spin_unlock_irqrestore(&device->resource->req_lock, flags); |
Arnd Bergmann | 2a48fc0 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1858 | mutex_unlock(&drbd_main_mutex); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1859 | |
| 1860 | return rv; |
| 1861 | } |
| 1862 | |
Al Viro | db2a144 | 2013-05-05 21:52:57 -0400 | [diff] [blame] | 1863 | static void drbd_release(struct gendisk *gd, fmode_t mode) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1864 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1865 | struct drbd_device *device = gd->private_data; |
Arnd Bergmann | 2a48fc0 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1866 | mutex_lock(&drbd_main_mutex); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1867 | device->open_cnt--; |
Arnd Bergmann | 2a48fc0 | 2010-06-02 14:28:52 +0200 | [diff] [blame] | 1868 | mutex_unlock(&drbd_main_mutex); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1869 | } |
| 1870 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1871 | static void drbd_set_defaults(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1872 | { |
Lars Ellenberg | f399002 | 2011-03-23 14:31:09 +0100 | [diff] [blame] | 1873 | /* Beware! The actual layout differs |
| 1874 | * between big endian and little endian */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1875 | device->state = (union drbd_dev_state) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1876 | { .role = R_SECONDARY, |
| 1877 | .peer = R_UNKNOWN, |
| 1878 | .conn = C_STANDALONE, |
| 1879 | .disk = D_DISKLESS, |
| 1880 | .pdsk = D_UNKNOWN, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1881 | } }; |
| 1882 | } |
| 1883 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1884 | void drbd_init_set_defaults(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1885 | { |
| 1886 | /* the memset(,0,) did most of this. |
| 1887 | * note: only assignments, no allocation in here */ |
| 1888 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1889 | drbd_set_defaults(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1890 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1891 | atomic_set(&device->ap_bio_cnt, 0); |
| 1892 | atomic_set(&device->ap_pending_cnt, 0); |
| 1893 | atomic_set(&device->rs_pending_cnt, 0); |
| 1894 | atomic_set(&device->unacked_cnt, 0); |
| 1895 | atomic_set(&device->local_cnt, 0); |
| 1896 | atomic_set(&device->pp_in_use_by_net, 0); |
| 1897 | atomic_set(&device->rs_sect_in, 0); |
| 1898 | atomic_set(&device->rs_sect_ev, 0); |
| 1899 | atomic_set(&device->ap_in_flight, 0); |
| 1900 | atomic_set(&device->md_io_in_use, 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1901 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1902 | mutex_init(&device->own_state_mutex); |
| 1903 | device->state_mutex = &device->own_state_mutex; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1904 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1905 | spin_lock_init(&device->al_lock); |
| 1906 | spin_lock_init(&device->peer_seq_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1907 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1908 | INIT_LIST_HEAD(&device->active_ee); |
| 1909 | INIT_LIST_HEAD(&device->sync_ee); |
| 1910 | INIT_LIST_HEAD(&device->done_ee); |
| 1911 | INIT_LIST_HEAD(&device->read_ee); |
| 1912 | INIT_LIST_HEAD(&device->net_ee); |
| 1913 | INIT_LIST_HEAD(&device->resync_reads); |
| 1914 | INIT_LIST_HEAD(&device->resync_work.list); |
| 1915 | INIT_LIST_HEAD(&device->unplug_work.list); |
| 1916 | INIT_LIST_HEAD(&device->go_diskless.list); |
| 1917 | INIT_LIST_HEAD(&device->md_sync_work.list); |
| 1918 | INIT_LIST_HEAD(&device->start_resync_work.list); |
| 1919 | INIT_LIST_HEAD(&device->bm_io_work.w.list); |
Philipp Reisner | 0ced55a | 2010-04-30 15:26:20 +0200 | [diff] [blame] | 1920 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1921 | device->resync_work.cb = w_resync_timer; |
| 1922 | device->unplug_work.cb = w_send_write_hint; |
| 1923 | device->go_diskless.cb = w_go_diskless; |
| 1924 | device->md_sync_work.cb = w_md_sync; |
| 1925 | device->bm_io_work.w.cb = w_bitmap_io; |
| 1926 | device->start_resync_work.cb = w_start_resync; |
Philipp Reisner | a21e929 | 2011-02-08 15:08:49 +0100 | [diff] [blame] | 1927 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1928 | init_timer(&device->resync_timer); |
| 1929 | init_timer(&device->md_sync_timer); |
| 1930 | init_timer(&device->start_resync_timer); |
| 1931 | init_timer(&device->request_timer); |
| 1932 | device->resync_timer.function = resync_timer_fn; |
| 1933 | device->resync_timer.data = (unsigned long) device; |
| 1934 | device->md_sync_timer.function = md_sync_timer_fn; |
| 1935 | device->md_sync_timer.data = (unsigned long) device; |
| 1936 | device->start_resync_timer.function = start_resync_timer_fn; |
| 1937 | device->start_resync_timer.data = (unsigned long) device; |
| 1938 | device->request_timer.function = request_timer_fn; |
| 1939 | device->request_timer.data = (unsigned long) device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1940 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1941 | init_waitqueue_head(&device->misc_wait); |
| 1942 | init_waitqueue_head(&device->state_wait); |
| 1943 | init_waitqueue_head(&device->ee_wait); |
| 1944 | init_waitqueue_head(&device->al_wait); |
| 1945 | init_waitqueue_head(&device->seq_wait); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1946 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1947 | device->resync_wenr = LC_FREE; |
| 1948 | device->peer_max_bio_size = DRBD_MAX_BIO_SIZE_SAFE; |
| 1949 | device->local_max_bio_size = DRBD_MAX_BIO_SIZE_SAFE; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1950 | } |
| 1951 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1952 | void drbd_device_cleanup(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1953 | { |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 1954 | int i; |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1955 | if (first_peer_device(device)->connection->receiver.t_state != NONE) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 1956 | drbd_err(device, "ASSERT FAILED: receiver t_state == %d expected 0.\n", |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 1957 | first_peer_device(device)->connection->receiver.t_state); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1958 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1959 | device->al_writ_cnt = |
| 1960 | device->bm_writ_cnt = |
| 1961 | device->read_cnt = |
| 1962 | device->recv_cnt = |
| 1963 | device->send_cnt = |
| 1964 | device->writ_cnt = |
| 1965 | device->p_size = |
| 1966 | device->rs_start = |
| 1967 | device->rs_total = |
| 1968 | device->rs_failed = 0; |
| 1969 | device->rs_last_events = 0; |
| 1970 | device->rs_last_sect_ev = 0; |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 1971 | for (i = 0; i < DRBD_SYNC_MARKS; i++) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1972 | device->rs_mark_left[i] = 0; |
| 1973 | device->rs_mark_time[i] = 0; |
Lars Ellenberg | 1d7734a | 2010-08-11 21:21:50 +0200 | [diff] [blame] | 1974 | } |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 1975 | D_ASSERT(device, first_peer_device(device)->connection->net_conf == NULL); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1976 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1977 | drbd_set_my_capacity(device, 0); |
| 1978 | if (device->bitmap) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1979 | /* maybe never allocated. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1980 | drbd_bm_resize(device, 0, 1); |
| 1981 | drbd_bm_cleanup(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1982 | } |
| 1983 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1984 | drbd_free_bc(device->ldev); |
| 1985 | device->ldev = NULL; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1986 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 1987 | clear_bit(AL_SUSPENDED, &device->flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 1988 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 1989 | D_ASSERT(device, list_empty(&device->active_ee)); |
| 1990 | D_ASSERT(device, list_empty(&device->sync_ee)); |
| 1991 | D_ASSERT(device, list_empty(&device->done_ee)); |
| 1992 | D_ASSERT(device, list_empty(&device->read_ee)); |
| 1993 | D_ASSERT(device, list_empty(&device->net_ee)); |
| 1994 | D_ASSERT(device, list_empty(&device->resync_reads)); |
| 1995 | D_ASSERT(device, list_empty(&first_peer_device(device)->connection->sender_work.q)); |
| 1996 | D_ASSERT(device, list_empty(&device->resync_work.list)); |
| 1997 | D_ASSERT(device, list_empty(&device->unplug_work.list)); |
| 1998 | D_ASSERT(device, list_empty(&device->go_diskless.list)); |
Lars Ellenberg | 2265b47 | 2010-12-16 15:41:26 +0100 | [diff] [blame] | 1999 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2000 | drbd_set_defaults(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2001 | } |
| 2002 | |
| 2003 | |
| 2004 | static void drbd_destroy_mempools(void) |
| 2005 | { |
| 2006 | struct page *page; |
| 2007 | |
| 2008 | while (drbd_pp_pool) { |
| 2009 | page = drbd_pp_pool; |
| 2010 | drbd_pp_pool = (struct page *)page_private(page); |
| 2011 | __free_page(page); |
| 2012 | drbd_pp_vacant--; |
| 2013 | } |
| 2014 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 2015 | /* D_ASSERT(device, atomic_read(&drbd_pp_vacant)==0); */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2016 | |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 2017 | if (drbd_md_io_bio_set) |
| 2018 | bioset_free(drbd_md_io_bio_set); |
Lars Ellenberg | 4281808 | 2011-02-23 12:39:46 +0100 | [diff] [blame] | 2019 | if (drbd_md_io_page_pool) |
| 2020 | mempool_destroy(drbd_md_io_page_pool); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2021 | if (drbd_ee_mempool) |
| 2022 | mempool_destroy(drbd_ee_mempool); |
| 2023 | if (drbd_request_mempool) |
| 2024 | mempool_destroy(drbd_request_mempool); |
| 2025 | if (drbd_ee_cache) |
| 2026 | kmem_cache_destroy(drbd_ee_cache); |
| 2027 | if (drbd_request_cache) |
| 2028 | kmem_cache_destroy(drbd_request_cache); |
| 2029 | if (drbd_bm_ext_cache) |
| 2030 | kmem_cache_destroy(drbd_bm_ext_cache); |
| 2031 | if (drbd_al_ext_cache) |
| 2032 | kmem_cache_destroy(drbd_al_ext_cache); |
| 2033 | |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 2034 | drbd_md_io_bio_set = NULL; |
Lars Ellenberg | 4281808 | 2011-02-23 12:39:46 +0100 | [diff] [blame] | 2035 | drbd_md_io_page_pool = NULL; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2036 | drbd_ee_mempool = NULL; |
| 2037 | drbd_request_mempool = NULL; |
| 2038 | drbd_ee_cache = NULL; |
| 2039 | drbd_request_cache = NULL; |
| 2040 | drbd_bm_ext_cache = NULL; |
| 2041 | drbd_al_ext_cache = NULL; |
| 2042 | |
| 2043 | return; |
| 2044 | } |
| 2045 | |
| 2046 | static int drbd_create_mempools(void) |
| 2047 | { |
| 2048 | struct page *page; |
Lars Ellenberg | 1816a2b | 2010-11-11 15:19:07 +0100 | [diff] [blame] | 2049 | const int number = (DRBD_MAX_BIO_SIZE/PAGE_SIZE) * minor_count; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2050 | int i; |
| 2051 | |
| 2052 | /* prepare our caches and mempools */ |
| 2053 | drbd_request_mempool = NULL; |
| 2054 | drbd_ee_cache = NULL; |
| 2055 | drbd_request_cache = NULL; |
| 2056 | drbd_bm_ext_cache = NULL; |
| 2057 | drbd_al_ext_cache = NULL; |
| 2058 | drbd_pp_pool = NULL; |
Lars Ellenberg | 4281808 | 2011-02-23 12:39:46 +0100 | [diff] [blame] | 2059 | drbd_md_io_page_pool = NULL; |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 2060 | drbd_md_io_bio_set = NULL; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2061 | |
| 2062 | /* caches */ |
| 2063 | drbd_request_cache = kmem_cache_create( |
| 2064 | "drbd_req", sizeof(struct drbd_request), 0, 0, NULL); |
| 2065 | if (drbd_request_cache == NULL) |
| 2066 | goto Enomem; |
| 2067 | |
| 2068 | drbd_ee_cache = kmem_cache_create( |
Andreas Gruenbacher | f6ffca9 | 2011-02-04 15:30:34 +0100 | [diff] [blame] | 2069 | "drbd_ee", sizeof(struct drbd_peer_request), 0, 0, NULL); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2070 | if (drbd_ee_cache == NULL) |
| 2071 | goto Enomem; |
| 2072 | |
| 2073 | drbd_bm_ext_cache = kmem_cache_create( |
| 2074 | "drbd_bm", sizeof(struct bm_extent), 0, 0, NULL); |
| 2075 | if (drbd_bm_ext_cache == NULL) |
| 2076 | goto Enomem; |
| 2077 | |
| 2078 | drbd_al_ext_cache = kmem_cache_create( |
| 2079 | "drbd_al", sizeof(struct lc_element), 0, 0, NULL); |
| 2080 | if (drbd_al_ext_cache == NULL) |
| 2081 | goto Enomem; |
| 2082 | |
| 2083 | /* mempools */ |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 2084 | drbd_md_io_bio_set = bioset_create(DRBD_MIN_POOL_PAGES, 0); |
| 2085 | if (drbd_md_io_bio_set == NULL) |
| 2086 | goto Enomem; |
Lars Ellenberg | 9476f39 | 2011-02-23 17:02:01 +0100 | [diff] [blame] | 2087 | |
Lars Ellenberg | 4281808 | 2011-02-23 12:39:46 +0100 | [diff] [blame] | 2088 | drbd_md_io_page_pool = mempool_create_page_pool(DRBD_MIN_POOL_PAGES, 0); |
| 2089 | if (drbd_md_io_page_pool == NULL) |
| 2090 | goto Enomem; |
| 2091 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2092 | drbd_request_mempool = mempool_create(number, |
| 2093 | mempool_alloc_slab, mempool_free_slab, drbd_request_cache); |
| 2094 | if (drbd_request_mempool == NULL) |
| 2095 | goto Enomem; |
| 2096 | |
| 2097 | drbd_ee_mempool = mempool_create(number, |
| 2098 | mempool_alloc_slab, mempool_free_slab, drbd_ee_cache); |
Nicolas Kaiser | 2027ae1 | 2010-10-28 06:15:26 -0600 | [diff] [blame] | 2099 | if (drbd_ee_mempool == NULL) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2100 | goto Enomem; |
| 2101 | |
| 2102 | /* drbd's page pool */ |
| 2103 | spin_lock_init(&drbd_pp_lock); |
| 2104 | |
| 2105 | for (i = 0; i < number; i++) { |
| 2106 | page = alloc_page(GFP_HIGHUSER); |
| 2107 | if (!page) |
| 2108 | goto Enomem; |
| 2109 | set_page_private(page, (unsigned long)drbd_pp_pool); |
| 2110 | drbd_pp_pool = page; |
| 2111 | } |
| 2112 | drbd_pp_vacant = number; |
| 2113 | |
| 2114 | return 0; |
| 2115 | |
| 2116 | Enomem: |
| 2117 | drbd_destroy_mempools(); /* in case we allocated some */ |
| 2118 | return -ENOMEM; |
| 2119 | } |
| 2120 | |
| 2121 | static int drbd_notify_sys(struct notifier_block *this, unsigned long code, |
| 2122 | void *unused) |
| 2123 | { |
| 2124 | /* just so we have it. you never know what interesting things we |
| 2125 | * might want to do here some day... |
| 2126 | */ |
| 2127 | |
| 2128 | return NOTIFY_DONE; |
| 2129 | } |
| 2130 | |
| 2131 | static struct notifier_block drbd_notifier = { |
| 2132 | .notifier_call = drbd_notify_sys, |
| 2133 | }; |
| 2134 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2135 | static void drbd_release_all_peer_reqs(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2136 | { |
| 2137 | int rr; |
| 2138 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2139 | rr = drbd_free_peer_reqs(device, &device->active_ee); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2140 | if (rr) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 2141 | drbd_err(device, "%d EEs in active list found!\n", rr); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2142 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2143 | rr = drbd_free_peer_reqs(device, &device->sync_ee); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2144 | if (rr) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 2145 | drbd_err(device, "%d EEs in sync list found!\n", rr); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2146 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2147 | rr = drbd_free_peer_reqs(device, &device->read_ee); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2148 | if (rr) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 2149 | drbd_err(device, "%d EEs in read list found!\n", rr); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2150 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2151 | rr = drbd_free_peer_reqs(device, &device->done_ee); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2152 | if (rr) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 2153 | drbd_err(device, "%d EEs in done list found!\n", rr); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2154 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2155 | rr = drbd_free_peer_reqs(device, &device->net_ee); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2156 | if (rr) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 2157 | drbd_err(device, "%d EEs in net list found!\n", rr); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2158 | } |
| 2159 | |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 2160 | /* caution. no locking. */ |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 2161 | void drbd_destroy_device(struct kref *kref) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2162 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2163 | struct drbd_device *device = container_of(kref, struct drbd_device, kref); |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2164 | struct drbd_resource *resource = device->resource; |
| 2165 | struct drbd_connection *connection; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2166 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2167 | del_timer_sync(&device->request_timer); |
Philipp Reisner | dfa8bed | 2011-06-29 14:06:08 +0200 | [diff] [blame] | 2168 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2169 | /* paranoia asserts */ |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 2170 | D_ASSERT(device, device->open_cnt == 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2171 | /* end paranoia asserts */ |
| 2172 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2173 | /* cleanup stuff that may have been allocated during |
| 2174 | * device (re-)configuration or state changes */ |
| 2175 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2176 | if (device->this_bdev) |
| 2177 | bdput(device->this_bdev); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2178 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2179 | drbd_free_bc(device->ldev); |
| 2180 | device->ldev = NULL; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2181 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2182 | drbd_release_all_peer_reqs(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2183 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2184 | lc_destroy(device->act_log); |
| 2185 | lc_destroy(device->resync); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2186 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2187 | kfree(device->p_uuid); |
| 2188 | /* device->p_uuid = NULL; */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2189 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2190 | if (device->bitmap) /* should no longer be there. */ |
| 2191 | drbd_bm_cleanup(device); |
| 2192 | __free_page(device->md_io_page); |
| 2193 | put_disk(device->vdisk); |
| 2194 | blk_cleanup_queue(device->rq_queue); |
| 2195 | kfree(device->rs_plan_s); |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 2196 | kfree(first_peer_device(device)); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2197 | kfree(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2198 | |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2199 | for_each_connection(connection, resource) |
| 2200 | kref_put(&connection->kref, drbd_destroy_connection); |
| 2201 | kref_put(&resource->kref, drbd_destroy_resource); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2202 | } |
| 2203 | |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2204 | /* One global retry thread, if we need to push back some bio and have it |
| 2205 | * reinserted through our make request function. |
| 2206 | */ |
| 2207 | static struct retry_worker { |
| 2208 | struct workqueue_struct *wq; |
| 2209 | struct work_struct worker; |
| 2210 | |
| 2211 | spinlock_t lock; |
| 2212 | struct list_head writes; |
| 2213 | } retry; |
| 2214 | |
| 2215 | static void do_retry(struct work_struct *ws) |
| 2216 | { |
| 2217 | struct retry_worker *retry = container_of(ws, struct retry_worker, worker); |
| 2218 | LIST_HEAD(writes); |
| 2219 | struct drbd_request *req, *tmp; |
| 2220 | |
| 2221 | spin_lock_irq(&retry->lock); |
| 2222 | list_splice_init(&retry->writes, &writes); |
| 2223 | spin_unlock_irq(&retry->lock); |
| 2224 | |
| 2225 | list_for_each_entry_safe(req, tmp, &writes, tl_requests) { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 2226 | struct drbd_device *device = req->device; |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2227 | struct bio *bio = req->master_bio; |
| 2228 | unsigned long start_time = req->start_time; |
Lars Ellenberg | 9a278a7 | 2012-07-24 10:12:36 +0200 | [diff] [blame] | 2229 | bool expected; |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2230 | |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 2231 | expected = |
Lars Ellenberg | 9a278a7 | 2012-07-24 10:12:36 +0200 | [diff] [blame] | 2232 | expect(atomic_read(&req->completion_ref) == 0) && |
| 2233 | expect(req->rq_state & RQ_POSTPONED) && |
| 2234 | expect((req->rq_state & RQ_LOCAL_PENDING) == 0 || |
| 2235 | (req->rq_state & RQ_LOCAL_ABORTED) != 0); |
| 2236 | |
| 2237 | if (!expected) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 2238 | drbd_err(device, "req=%p completion_ref=%d rq_state=%x\n", |
Lars Ellenberg | 9a278a7 | 2012-07-24 10:12:36 +0200 | [diff] [blame] | 2239 | req, atomic_read(&req->completion_ref), |
| 2240 | req->rq_state); |
| 2241 | |
| 2242 | /* We still need to put one kref associated with the |
| 2243 | * "completion_ref" going zero in the code path that queued it |
| 2244 | * here. The request object may still be referenced by a |
| 2245 | * frozen local req->private_bio, in case we force-detached. |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2246 | */ |
Lars Ellenberg | 9a278a7 | 2012-07-24 10:12:36 +0200 | [diff] [blame] | 2247 | kref_put(&req->kref, drbd_req_destroy); |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2248 | |
| 2249 | /* A single suspended or otherwise blocking device may stall |
| 2250 | * all others as well. Fortunately, this code path is to |
| 2251 | * recover from a situation that "should not happen": |
| 2252 | * concurrent writes in multi-primary setup. |
| 2253 | * In a "normal" lifecycle, this workqueue is supposed to be |
| 2254 | * destroyed without ever doing anything. |
| 2255 | * If it turns out to be an issue anyways, we can do per |
| 2256 | * resource (replication group) or per device (minor) retry |
| 2257 | * workqueues instead. |
| 2258 | */ |
| 2259 | |
| 2260 | /* We are not just doing generic_make_request(), |
| 2261 | * as we want to keep the start_time information. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2262 | inc_ap_bio(device); |
| 2263 | __drbd_make_request(device, bio, start_time); |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2264 | } |
| 2265 | } |
| 2266 | |
Lars Ellenberg | 9d05e7c | 2012-07-17 10:05:04 +0200 | [diff] [blame] | 2267 | void drbd_restart_request(struct drbd_request *req) |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2268 | { |
| 2269 | unsigned long flags; |
| 2270 | spin_lock_irqsave(&retry.lock, flags); |
| 2271 | list_move_tail(&req->tl_requests, &retry.writes); |
| 2272 | spin_unlock_irqrestore(&retry.lock, flags); |
| 2273 | |
| 2274 | /* Drop the extra reference that would otherwise |
| 2275 | * have been dropped by complete_master_bio. |
| 2276 | * do_retry() needs to grab a new one. */ |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 2277 | dec_ap_bio(req->device); |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2278 | |
| 2279 | queue_work(retry.wq, &retry.worker); |
| 2280 | } |
| 2281 | |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2282 | void drbd_destroy_resource(struct kref *kref) |
| 2283 | { |
| 2284 | struct drbd_resource *resource = |
| 2285 | container_of(kref, struct drbd_resource, kref); |
| 2286 | |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2287 | idr_destroy(&resource->devices); |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 2288 | free_cpumask_var(resource->cpu_mask); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2289 | kfree(resource->name); |
| 2290 | kfree(resource); |
| 2291 | } |
| 2292 | |
| 2293 | void drbd_free_resource(struct drbd_resource *resource) |
| 2294 | { |
| 2295 | struct drbd_connection *connection, *tmp; |
| 2296 | |
| 2297 | for_each_connection_safe(connection, tmp, resource) { |
| 2298 | list_del(&connection->connections); |
| 2299 | kref_put(&connection->kref, drbd_destroy_connection); |
| 2300 | } |
| 2301 | kref_put(&resource->kref, drbd_destroy_resource); |
| 2302 | } |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2303 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2304 | static void drbd_cleanup(void) |
| 2305 | { |
| 2306 | unsigned int i; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2307 | struct drbd_device *device; |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2308 | struct drbd_resource *resource, *tmp; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2309 | |
| 2310 | unregister_reboot_notifier(&drbd_notifier); |
| 2311 | |
Lars Ellenberg | 17a93f30 | 2010-11-24 10:37:35 +0100 | [diff] [blame] | 2312 | /* first remove proc, |
| 2313 | * drbdsetup uses it's presence to detect |
| 2314 | * whether DRBD is loaded. |
| 2315 | * If we would get stuck in proc removal, |
| 2316 | * but have netlink already deregistered, |
| 2317 | * some drbdsetup commands may wait forever |
| 2318 | * for an answer. |
| 2319 | */ |
| 2320 | if (drbd_proc) |
| 2321 | remove_proc_entry("drbd", NULL); |
| 2322 | |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2323 | if (retry.wq) |
| 2324 | destroy_workqueue(retry.wq); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2325 | |
Lars Ellenberg | 3b98c0c | 2011-03-07 12:49:34 +0100 | [diff] [blame] | 2326 | drbd_genl_unregister(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2327 | |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2328 | idr_for_each_entry(&drbd_devices, device, i) |
Andreas Gruenbacher | f82795d | 2011-07-03 23:32:26 +0200 | [diff] [blame] | 2329 | drbd_delete_device(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2330 | |
Philipp Reisner | c141ebd | 2011-05-05 16:13:10 +0200 | [diff] [blame] | 2331 | /* not _rcu since, no other updater anymore. Genl already unregistered */ |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2332 | for_each_resource_safe(resource, tmp, &drbd_resources) { |
| 2333 | list_del(&resource->resources); |
| 2334 | drbd_free_resource(resource); |
Philipp Reisner | 81fa2e6 | 2011-05-04 15:10:30 +0200 | [diff] [blame] | 2335 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2336 | |
Philipp Reisner | 81a5d60 | 2011-02-22 19:53:16 -0500 | [diff] [blame] | 2337 | drbd_destroy_mempools(); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2338 | unregister_blkdev(DRBD_MAJOR, "drbd"); |
| 2339 | |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 2340 | idr_destroy(&drbd_devices); |
Philipp Reisner | 81a5d60 | 2011-02-22 19:53:16 -0500 | [diff] [blame] | 2341 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2342 | printk(KERN_INFO "drbd: module cleanup done.\n"); |
| 2343 | } |
| 2344 | |
| 2345 | /** |
Artem Bityutskiy | d97482e | 2012-07-25 18:12:12 +0300 | [diff] [blame] | 2346 | * drbd_congested() - Callback for the flusher thread |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2347 | * @congested_data: User data |
Artem Bityutskiy | d97482e | 2012-07-25 18:12:12 +0300 | [diff] [blame] | 2348 | * @bdi_bits: Bits the BDI flusher thread is currently interested in |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2349 | * |
| 2350 | * Returns 1<<BDI_async_congested and/or 1<<BDI_sync_congested if we are congested. |
| 2351 | */ |
| 2352 | static int drbd_congested(void *congested_data, int bdi_bits) |
| 2353 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2354 | struct drbd_device *device = congested_data; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2355 | struct request_queue *q; |
| 2356 | char reason = '-'; |
| 2357 | int r = 0; |
| 2358 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2359 | if (!may_inc_ap_bio(device)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2360 | /* DRBD has frozen IO */ |
| 2361 | r = bdi_bits; |
| 2362 | reason = 'd'; |
| 2363 | goto out; |
| 2364 | } |
| 2365 | |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 2366 | if (test_bit(CALLBACK_PENDING, &first_peer_device(device)->connection->flags)) { |
Lars Ellenberg | c2ba686 | 2012-06-14 15:14:06 +0200 | [diff] [blame] | 2367 | r |= (1 << BDI_async_congested); |
| 2368 | /* Without good local data, we would need to read from remote, |
| 2369 | * and that would need the worker thread as well, which is |
| 2370 | * currently blocked waiting for that usermode helper to |
| 2371 | * finish. |
| 2372 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2373 | if (!get_ldev_if_state(device, D_UP_TO_DATE)) |
Lars Ellenberg | c2ba686 | 2012-06-14 15:14:06 +0200 | [diff] [blame] | 2374 | r |= (1 << BDI_sync_congested); |
| 2375 | else |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2376 | put_ldev(device); |
Lars Ellenberg | c2ba686 | 2012-06-14 15:14:06 +0200 | [diff] [blame] | 2377 | r &= bdi_bits; |
| 2378 | reason = 'c'; |
| 2379 | goto out; |
| 2380 | } |
| 2381 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2382 | if (get_ldev(device)) { |
| 2383 | q = bdev_get_queue(device->ldev->backing_bdev); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2384 | r = bdi_congested(&q->backing_dev_info, bdi_bits); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2385 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2386 | if (r) |
| 2387 | reason = 'b'; |
| 2388 | } |
| 2389 | |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 2390 | if (bdi_bits & (1 << BDI_async_congested) && |
| 2391 | test_bit(NET_CONGESTED, &first_peer_device(device)->connection->flags)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2392 | r |= (1 << BDI_async_congested); |
| 2393 | reason = reason == 'b' ? 'a' : 'n'; |
| 2394 | } |
| 2395 | |
| 2396 | out: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2397 | device->congestion_reason = reason; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2398 | return r; |
| 2399 | } |
| 2400 | |
Philipp Reisner | 6699b65 | 2011-02-09 11:10:24 +0100 | [diff] [blame] | 2401 | static void drbd_init_workqueue(struct drbd_work_queue* wq) |
| 2402 | { |
Philipp Reisner | 6699b65 | 2011-02-09 11:10:24 +0100 | [diff] [blame] | 2403 | spin_lock_init(&wq->q_lock); |
| 2404 | INIT_LIST_HEAD(&wq->q); |
Lars Ellenberg | 8c0785a | 2011-10-19 11:50:57 +0200 | [diff] [blame] | 2405 | init_waitqueue_head(&wq->q_wait); |
Philipp Reisner | 6699b65 | 2011-02-09 11:10:24 +0100 | [diff] [blame] | 2406 | } |
| 2407 | |
Andreas Gruenbacher | b5043c5 | 2011-07-28 15:56:02 +0200 | [diff] [blame] | 2408 | struct completion_work { |
| 2409 | struct drbd_work w; |
| 2410 | struct completion done; |
| 2411 | }; |
| 2412 | |
| 2413 | static int w_complete(struct drbd_work *w, int cancel) |
| 2414 | { |
| 2415 | struct completion_work *completion_work = |
| 2416 | container_of(w, struct completion_work, w); |
| 2417 | |
| 2418 | complete(&completion_work->done); |
| 2419 | return 0; |
| 2420 | } |
| 2421 | |
| 2422 | void drbd_flush_workqueue(struct drbd_work_queue *work_queue) |
| 2423 | { |
| 2424 | struct completion_work completion_work; |
| 2425 | |
| 2426 | completion_work.w.cb = w_complete; |
| 2427 | init_completion(&completion_work.done); |
| 2428 | drbd_queue_work(work_queue, &completion_work.w); |
| 2429 | wait_for_completion(&completion_work.done); |
| 2430 | } |
| 2431 | |
Andreas Gruenbacher | 4bc7604 | 2011-06-13 14:27:45 +0200 | [diff] [blame] | 2432 | struct drbd_resource *drbd_find_resource(const char *name) |
Philipp Reisner | 1aba4d7 | 2011-02-21 15:38:08 +0100 | [diff] [blame] | 2433 | { |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2434 | struct drbd_resource *resource; |
Philipp Reisner | 1aba4d7 | 2011-02-21 15:38:08 +0100 | [diff] [blame] | 2435 | |
Lars Ellenberg | 3b98c0c | 2011-03-07 12:49:34 +0100 | [diff] [blame] | 2436 | if (!name || !name[0]) |
| 2437 | return NULL; |
| 2438 | |
Philipp Reisner | c141ebd | 2011-05-05 16:13:10 +0200 | [diff] [blame] | 2439 | rcu_read_lock(); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2440 | for_each_resource_rcu(resource, &drbd_resources) { |
| 2441 | if (!strcmp(resource->name, name)) { |
Andreas Gruenbacher | 4bc7604 | 2011-06-13 14:27:45 +0200 | [diff] [blame] | 2442 | kref_get(&resource->kref); |
Philipp Reisner | 1aba4d7 | 2011-02-21 15:38:08 +0100 | [diff] [blame] | 2443 | goto found; |
Philipp Reisner | 0ace9df | 2011-04-24 10:53:19 +0200 | [diff] [blame] | 2444 | } |
Philipp Reisner | 1aba4d7 | 2011-02-21 15:38:08 +0100 | [diff] [blame] | 2445 | } |
Andreas Gruenbacher | 4bc7604 | 2011-06-13 14:27:45 +0200 | [diff] [blame] | 2446 | resource = NULL; |
Philipp Reisner | 1aba4d7 | 2011-02-21 15:38:08 +0100 | [diff] [blame] | 2447 | found: |
Philipp Reisner | c141ebd | 2011-05-05 16:13:10 +0200 | [diff] [blame] | 2448 | rcu_read_unlock(); |
Andreas Gruenbacher | 4bc7604 | 2011-06-13 14:27:45 +0200 | [diff] [blame] | 2449 | return resource; |
Philipp Reisner | 1aba4d7 | 2011-02-21 15:38:08 +0100 | [diff] [blame] | 2450 | } |
| 2451 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2452 | struct drbd_connection *conn_get_by_addrs(void *my_addr, int my_addr_len, |
Andreas Gruenbacher | 089c075 | 2011-06-14 18:28:09 +0200 | [diff] [blame] | 2453 | void *peer_addr, int peer_addr_len) |
| 2454 | { |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2455 | struct drbd_resource *resource; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2456 | struct drbd_connection *connection; |
Andreas Gruenbacher | 089c075 | 2011-06-14 18:28:09 +0200 | [diff] [blame] | 2457 | |
| 2458 | rcu_read_lock(); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2459 | for_each_resource_rcu(resource, &drbd_resources) { |
| 2460 | for_each_connection_rcu(connection, resource) { |
| 2461 | if (connection->my_addr_len == my_addr_len && |
| 2462 | connection->peer_addr_len == peer_addr_len && |
| 2463 | !memcmp(&connection->my_addr, my_addr, my_addr_len) && |
| 2464 | !memcmp(&connection->peer_addr, peer_addr, peer_addr_len)) { |
| 2465 | kref_get(&connection->kref); |
| 2466 | goto found; |
| 2467 | } |
Andreas Gruenbacher | 089c075 | 2011-06-14 18:28:09 +0200 | [diff] [blame] | 2468 | } |
| 2469 | } |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2470 | connection = NULL; |
Andreas Gruenbacher | 089c075 | 2011-06-14 18:28:09 +0200 | [diff] [blame] | 2471 | found: |
| 2472 | rcu_read_unlock(); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2473 | return connection; |
Andreas Gruenbacher | 089c075 | 2011-06-14 18:28:09 +0200 | [diff] [blame] | 2474 | } |
| 2475 | |
Andreas Gruenbacher | e6ef8a5 | 2011-03-24 18:07:54 +0100 | [diff] [blame] | 2476 | static int drbd_alloc_socket(struct drbd_socket *socket) |
| 2477 | { |
| 2478 | socket->rbuf = (void *) __get_free_page(GFP_KERNEL); |
| 2479 | if (!socket->rbuf) |
| 2480 | return -ENOMEM; |
Andreas Gruenbacher | 5a87d92 | 2011-03-24 21:17:52 +0100 | [diff] [blame] | 2481 | socket->sbuf = (void *) __get_free_page(GFP_KERNEL); |
| 2482 | if (!socket->sbuf) |
| 2483 | return -ENOMEM; |
Andreas Gruenbacher | e6ef8a5 | 2011-03-24 18:07:54 +0100 | [diff] [blame] | 2484 | return 0; |
| 2485 | } |
| 2486 | |
| 2487 | static void drbd_free_socket(struct drbd_socket *socket) |
| 2488 | { |
Andreas Gruenbacher | 5a87d92 | 2011-03-24 21:17:52 +0100 | [diff] [blame] | 2489 | free_page((unsigned long) socket->sbuf); |
Andreas Gruenbacher | e6ef8a5 | 2011-03-24 18:07:54 +0100 | [diff] [blame] | 2490 | free_page((unsigned long) socket->rbuf); |
| 2491 | } |
| 2492 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2493 | void conn_free_crypto(struct drbd_connection *connection) |
Philipp Reisner | 91fd4da | 2011-04-20 17:47:29 +0200 | [diff] [blame] | 2494 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2495 | drbd_free_sock(connection); |
Philipp Reisner | 1d04122 | 2011-04-22 15:20:23 +0200 | [diff] [blame] | 2496 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2497 | crypto_free_hash(connection->csums_tfm); |
| 2498 | crypto_free_hash(connection->verify_tfm); |
| 2499 | crypto_free_hash(connection->cram_hmac_tfm); |
| 2500 | crypto_free_hash(connection->integrity_tfm); |
| 2501 | crypto_free_hash(connection->peer_integrity_tfm); |
| 2502 | kfree(connection->int_dig_in); |
| 2503 | kfree(connection->int_dig_vv); |
Philipp Reisner | 1d04122 | 2011-04-22 15:20:23 +0200 | [diff] [blame] | 2504 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2505 | connection->csums_tfm = NULL; |
| 2506 | connection->verify_tfm = NULL; |
| 2507 | connection->cram_hmac_tfm = NULL; |
| 2508 | connection->integrity_tfm = NULL; |
| 2509 | connection->peer_integrity_tfm = NULL; |
| 2510 | connection->int_dig_in = NULL; |
| 2511 | connection->int_dig_vv = NULL; |
Philipp Reisner | 91fd4da | 2011-04-20 17:47:29 +0200 | [diff] [blame] | 2512 | } |
| 2513 | |
Andreas Gruenbacher | eb6bea6 | 2011-06-21 16:11:28 +0200 | [diff] [blame] | 2514 | int set_resource_options(struct drbd_resource *resource, struct res_opts *res_opts) |
Andreas Gruenbacher | afbbfa8 | 2011-06-16 17:58:02 +0200 | [diff] [blame] | 2515 | { |
Andreas Gruenbacher | eb6bea6 | 2011-06-21 16:11:28 +0200 | [diff] [blame] | 2516 | struct drbd_connection *connection; |
Andreas Gruenbacher | afbbfa8 | 2011-06-16 17:58:02 +0200 | [diff] [blame] | 2517 | cpumask_var_t new_cpu_mask; |
| 2518 | int err; |
| 2519 | |
| 2520 | if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) |
| 2521 | return -ENOMEM; |
| 2522 | /* |
| 2523 | retcode = ERR_NOMEM; |
| 2524 | drbd_msg_put_info("unable to allocate cpumask"); |
| 2525 | */ |
| 2526 | |
| 2527 | /* silently ignore cpu mask on UP kernel */ |
| 2528 | if (nr_cpu_ids > 1 && res_opts->cpu_mask[0] != 0) { |
Andreas Gruenbacher | f44d043 | 2011-07-22 13:53:19 +0200 | [diff] [blame] | 2529 | err = bitmap_parse(res_opts->cpu_mask, DRBD_CPU_MASK_SIZE, |
Philipp Reisner | c5b005a | 2012-04-30 12:53:52 +0200 | [diff] [blame] | 2530 | cpumask_bits(new_cpu_mask), nr_cpu_ids); |
Andreas Gruenbacher | afbbfa8 | 2011-06-16 17:58:02 +0200 | [diff] [blame] | 2531 | if (err) { |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 2532 | drbd_warn(resource, "bitmap_parse() failed with %d\n", err); |
Andreas Gruenbacher | afbbfa8 | 2011-06-16 17:58:02 +0200 | [diff] [blame] | 2533 | /* retcode = ERR_CPU_MASK_PARSE; */ |
| 2534 | goto fail; |
| 2535 | } |
| 2536 | } |
Andreas Gruenbacher | eb6bea6 | 2011-06-21 16:11:28 +0200 | [diff] [blame] | 2537 | resource->res_opts = *res_opts; |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 2538 | if (cpumask_empty(new_cpu_mask)) |
| 2539 | drbd_calc_cpu_mask(&new_cpu_mask); |
| 2540 | if (!cpumask_equal(resource->cpu_mask, new_cpu_mask)) { |
| 2541 | cpumask_copy(resource->cpu_mask, new_cpu_mask); |
| 2542 | for_each_connection_rcu(connection, resource) { |
Andreas Gruenbacher | eb6bea6 | 2011-06-21 16:11:28 +0200 | [diff] [blame] | 2543 | connection->receiver.reset_cpu_mask = 1; |
| 2544 | connection->asender.reset_cpu_mask = 1; |
| 2545 | connection->worker.reset_cpu_mask = 1; |
| 2546 | } |
Andreas Gruenbacher | afbbfa8 | 2011-06-16 17:58:02 +0200 | [diff] [blame] | 2547 | } |
| 2548 | err = 0; |
| 2549 | |
| 2550 | fail: |
| 2551 | free_cpumask_var(new_cpu_mask); |
| 2552 | return err; |
| 2553 | |
| 2554 | } |
| 2555 | |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2556 | struct drbd_resource *drbd_create_resource(const char *name) |
| 2557 | { |
| 2558 | struct drbd_resource *resource; |
| 2559 | |
Andreas Gruenbacher | 6bbf53c | 2011-07-08 01:19:44 +0200 | [diff] [blame] | 2560 | resource = kzalloc(sizeof(struct drbd_resource), GFP_KERNEL); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2561 | if (!resource) |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 2562 | goto fail; |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2563 | resource->name = kstrdup(name, GFP_KERNEL); |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 2564 | if (!resource->name) |
| 2565 | goto fail_free_resource; |
| 2566 | if (!zalloc_cpumask_var(&resource->cpu_mask, GFP_KERNEL)) |
| 2567 | goto fail_free_name; |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2568 | kref_init(&resource->kref); |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2569 | idr_init(&resource->devices); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2570 | INIT_LIST_HEAD(&resource->connections); |
| 2571 | list_add_tail_rcu(&resource->resources, &drbd_resources); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 2572 | mutex_init(&resource->conf_update); |
| 2573 | spin_lock_init(&resource->req_lock); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2574 | return resource; |
Andreas Gruenbacher | 625a6ba | 2011-07-22 14:29:02 +0200 | [diff] [blame] | 2575 | |
| 2576 | fail_free_name: |
| 2577 | kfree(resource->name); |
| 2578 | fail_free_resource: |
| 2579 | kfree(resource); |
| 2580 | fail: |
| 2581 | return NULL; |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2582 | } |
| 2583 | |
Philipp Reisner | ec0bddb | 2011-05-04 15:47:01 +0200 | [diff] [blame] | 2584 | /* caller must be under genl_lock() */ |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2585 | struct drbd_connection *conn_create(const char *name, struct res_opts *res_opts) |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2586 | { |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2587 | struct drbd_resource *resource; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2588 | struct drbd_connection *connection; |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2589 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2590 | connection = kzalloc(sizeof(struct drbd_connection), GFP_KERNEL); |
| 2591 | if (!connection) |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2592 | return NULL; |
| 2593 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2594 | if (drbd_alloc_socket(&connection->data)) |
Andreas Gruenbacher | e6ef8a5 | 2011-03-24 18:07:54 +0100 | [diff] [blame] | 2595 | goto fail; |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2596 | if (drbd_alloc_socket(&connection->meta)) |
Andreas Gruenbacher | e6ef8a5 | 2011-03-24 18:07:54 +0100 | [diff] [blame] | 2597 | goto fail; |
| 2598 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2599 | connection->current_epoch = kzalloc(sizeof(struct drbd_epoch), GFP_KERNEL); |
| 2600 | if (!connection->current_epoch) |
Philipp Reisner | 12038a3 | 2011-11-09 19:18:00 +0100 | [diff] [blame] | 2601 | goto fail; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2602 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2603 | INIT_LIST_HEAD(&connection->transfer_log); |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2604 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2605 | INIT_LIST_HEAD(&connection->current_epoch->list); |
| 2606 | connection->epochs = 1; |
| 2607 | spin_lock_init(&connection->epoch_lock); |
| 2608 | connection->write_ordering = WO_bdev_flush; |
Philipp Reisner | 4b0007c | 2011-11-09 20:12:34 +0100 | [diff] [blame] | 2609 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2610 | connection->send.seen_any_write_yet = false; |
| 2611 | connection->send.current_epoch_nr = 0; |
| 2612 | connection->send.current_epoch_writes = 0; |
Lars Ellenberg | b6dd1a8 | 2011-11-28 15:04:49 +0100 | [diff] [blame] | 2613 | |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2614 | resource = drbd_create_resource(name); |
| 2615 | if (!resource) |
| 2616 | goto fail; |
| 2617 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2618 | connection->cstate = C_STANDALONE; |
| 2619 | mutex_init(&connection->cstate_mutex); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2620 | init_waitqueue_head(&connection->ping_wait); |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2621 | idr_init(&connection->peer_devices); |
Philipp Reisner | b2fb6dbe | 2011-01-19 13:48:44 +0100 | [diff] [blame] | 2622 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2623 | drbd_init_workqueue(&connection->sender_work); |
| 2624 | mutex_init(&connection->data.mutex); |
| 2625 | mutex_init(&connection->meta.mutex); |
Philipp Reisner | 6699b65 | 2011-02-09 11:10:24 +0100 | [diff] [blame] | 2626 | |
Andreas Gruenbacher | 2457b6d | 2011-07-21 13:45:21 +0200 | [diff] [blame] | 2627 | drbd_thread_init(resource, &connection->receiver, drbd_receiver, "receiver"); |
| 2628 | connection->receiver.connection = connection; |
| 2629 | drbd_thread_init(resource, &connection->worker, drbd_worker, "worker"); |
| 2630 | connection->worker.connection = connection; |
| 2631 | drbd_thread_init(resource, &connection->asender, drbd_asender, "asender"); |
| 2632 | connection->asender.connection = connection; |
Philipp Reisner | 392c880 | 2011-02-09 10:33:31 +0100 | [diff] [blame] | 2633 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2634 | kref_init(&connection->kref); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2635 | |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2636 | connection->resource = resource; |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2637 | |
Andreas Gruenbacher | eb6bea6 | 2011-06-21 16:11:28 +0200 | [diff] [blame] | 2638 | if (set_resource_options(resource, res_opts)) |
| 2639 | goto fail_resource; |
| 2640 | |
| 2641 | kref_get(&resource->kref); |
| 2642 | list_add_tail_rcu(&connection->connections, &resource->connections); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2643 | return connection; |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2644 | |
Andreas Gruenbacher | eb6bea6 | 2011-06-21 16:11:28 +0200 | [diff] [blame] | 2645 | fail_resource: |
| 2646 | list_del(&resource->resources); |
| 2647 | drbd_free_resource(resource); |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2648 | fail: |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2649 | kfree(connection->current_epoch); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2650 | drbd_free_socket(&connection->meta); |
| 2651 | drbd_free_socket(&connection->data); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2652 | kfree(connection); |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2653 | return NULL; |
| 2654 | } |
| 2655 | |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 2656 | void drbd_destroy_connection(struct kref *kref) |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2657 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2658 | struct drbd_connection *connection = container_of(kref, struct drbd_connection, kref); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2659 | struct drbd_resource *resource = connection->resource; |
Philipp Reisner | 9dc9fbb | 2011-04-22 15:23:32 +0200 | [diff] [blame] | 2660 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2661 | if (atomic_read(&connection->current_epoch->epoch_size) != 0) |
Andreas Gruenbacher | 1ec861e | 2011-07-06 11:01:44 +0200 | [diff] [blame] | 2662 | drbd_err(connection, "epoch_size:%d\n", atomic_read(&connection->current_epoch->epoch_size)); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2663 | kfree(connection->current_epoch); |
Philipp Reisner | 12038a3 | 2011-11-09 19:18:00 +0100 | [diff] [blame] | 2664 | |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2665 | idr_destroy(&connection->peer_devices); |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2666 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2667 | drbd_free_socket(&connection->meta); |
| 2668 | drbd_free_socket(&connection->data); |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2669 | kfree(connection->int_dig_in); |
| 2670 | kfree(connection->int_dig_vv); |
| 2671 | kfree(connection); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2672 | kref_put(&resource->kref, drbd_destroy_resource); |
Philipp Reisner | 2111438 | 2011-01-19 12:26:59 +0100 | [diff] [blame] | 2673 | } |
| 2674 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2675 | static int init_submitter(struct drbd_device *device) |
Lars Ellenberg | 113fef9 | 2013-03-22 18:14:40 -0600 | [diff] [blame] | 2676 | { |
| 2677 | /* opencoded create_singlethread_workqueue(), |
| 2678 | * to be able to say "drbd%d", ..., minor */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2679 | device->submit.wq = alloc_workqueue("drbd%u_submit", |
| 2680 | WQ_UNBOUND | WQ_MEM_RECLAIM, 1, device->minor); |
| 2681 | if (!device->submit.wq) |
Lars Ellenberg | 113fef9 | 2013-03-22 18:14:40 -0600 | [diff] [blame] | 2682 | return -ENOMEM; |
| 2683 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2684 | INIT_WORK(&device->submit.worker, do_submit); |
| 2685 | spin_lock_init(&device->submit.lock); |
| 2686 | INIT_LIST_HEAD(&device->submit.writes); |
Lars Ellenberg | 113fef9 | 2013-03-22 18:14:40 -0600 | [diff] [blame] | 2687 | return 0; |
| 2688 | } |
| 2689 | |
Andreas Gruenbacher | 59515a2 | 2011-07-06 14:20:49 +0200 | [diff] [blame] | 2690 | enum drbd_ret_code drbd_create_device(struct drbd_resource *resource, unsigned int minor, int vnr) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2691 | { |
Andreas Gruenbacher | b6f85ef | 2011-07-06 15:03:31 +0200 | [diff] [blame] | 2692 | struct drbd_connection *connection; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2693 | struct drbd_device *device; |
Andreas Gruenbacher | b6f85ef | 2011-07-06 15:03:31 +0200 | [diff] [blame] | 2694 | struct drbd_peer_device *peer_device, *tmp_peer_device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2695 | struct gendisk *disk; |
| 2696 | struct request_queue *q; |
Andreas Gruenbacher | 93e4bf7 | 2013-05-23 14:57:17 +0200 | [diff] [blame] | 2697 | int id; |
Lars Ellenberg | 8432b31 | 2011-03-08 16:11:16 +0100 | [diff] [blame] | 2698 | enum drbd_ret_code err = ERR_NOMEM; |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 2699 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2700 | device = minor_to_device(minor); |
| 2701 | if (device) |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 2702 | return ERR_MINOR_EXISTS; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2703 | |
| 2704 | /* GFP_KERNEL, we are outside of all write-out paths */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2705 | device = kzalloc(sizeof(struct drbd_device), GFP_KERNEL); |
| 2706 | if (!device) |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 2707 | return ERR_NOMEM; |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2708 | kref_init(&device->kref); |
| 2709 | |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2710 | kref_get(&resource->kref); |
| 2711 | device->resource = resource; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2712 | device->minor = minor; |
| 2713 | device->vnr = vnr; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2714 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2715 | drbd_init_set_defaults(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2716 | |
| 2717 | q = blk_alloc_queue(GFP_KERNEL); |
| 2718 | if (!q) |
| 2719 | goto out_no_q; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2720 | device->rq_queue = q; |
| 2721 | q->queuedata = device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2722 | |
| 2723 | disk = alloc_disk(1); |
| 2724 | if (!disk) |
| 2725 | goto out_no_disk; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2726 | device->vdisk = disk; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2727 | |
Andreas Gruenbacher | 81e8465 | 2010-12-09 15:03:57 +0100 | [diff] [blame] | 2728 | set_disk_ro(disk, true); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2729 | |
| 2730 | disk->queue = q; |
| 2731 | disk->major = DRBD_MAJOR; |
| 2732 | disk->first_minor = minor; |
| 2733 | disk->fops = &drbd_ops; |
| 2734 | sprintf(disk->disk_name, "drbd%d", minor); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2735 | disk->private_data = device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2736 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2737 | device->this_bdev = bdget(MKDEV(DRBD_MAJOR, minor)); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2738 | /* we have no partitions. we contain only ourselves. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2739 | device->this_bdev->bd_contains = device->this_bdev; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2740 | |
| 2741 | q->backing_dev_info.congested_fn = drbd_congested; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2742 | q->backing_dev_info.congested_data = device; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2743 | |
Andreas Gruenbacher | 2f58dcf | 2010-12-13 17:48:19 +0100 | [diff] [blame] | 2744 | blk_queue_make_request(q, drbd_make_request); |
Lars Ellenberg | a73ff32 | 2012-06-25 19:15:38 +0200 | [diff] [blame] | 2745 | blk_queue_flush(q, REQ_FLUSH | REQ_FUA); |
Philipp Reisner | 99432fc | 2011-05-20 16:39:13 +0200 | [diff] [blame] | 2746 | /* Setting the max_hw_sectors to an odd value of 8kibyte here |
| 2747 | This triggers a max_bio_size message upon first attach or connect */ |
| 2748 | blk_queue_max_hw_sectors(q, DRBD_MAX_BIO_SIZE_SAFE >> 8); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2749 | blk_queue_bounce_limit(q, BLK_BOUNCE_ANY); |
| 2750 | blk_queue_merge_bvec(q, drbd_merge_bvec); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 2751 | q->queue_lock = &resource->req_lock; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2752 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2753 | device->md_io_page = alloc_page(GFP_KERNEL); |
| 2754 | if (!device->md_io_page) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2755 | goto out_no_io_page; |
| 2756 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2757 | if (drbd_bm_init(device)) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2758 | goto out_no_bitmap; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2759 | device->read_requests = RB_ROOT; |
| 2760 | device->write_requests = RB_ROOT; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2761 | |
Andreas Gruenbacher | 93e4bf7 | 2013-05-23 14:57:17 +0200 | [diff] [blame] | 2762 | id = idr_alloc(&drbd_devices, device, minor, minor + 1, GFP_KERNEL); |
| 2763 | if (id < 0) { |
| 2764 | if (id == -ENOSPC) { |
Tejun Heo | 56de210 | 2013-02-27 17:04:01 -0800 | [diff] [blame] | 2765 | err = ERR_MINOR_EXISTS; |
| 2766 | drbd_msg_put_info("requested minor exists already"); |
| 2767 | } |
Lars Ellenberg | 8432b31 | 2011-03-08 16:11:16 +0100 | [diff] [blame] | 2768 | goto out_no_minor_idr; |
Tejun Heo | 56de210 | 2013-02-27 17:04:01 -0800 | [diff] [blame] | 2769 | } |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2770 | kref_get(&device->kref); |
| 2771 | |
| 2772 | id = idr_alloc(&resource->devices, device, vnr, vnr + 1, GFP_KERNEL); |
| 2773 | if (id < 0) { |
| 2774 | if (id == -ENOSPC) { |
| 2775 | err = ERR_MINOR_EXISTS; |
| 2776 | drbd_msg_put_info("requested minor exists already"); |
| 2777 | } |
| 2778 | goto out_idr_remove_minor; |
| 2779 | } |
| 2780 | kref_get(&device->kref); |
Tejun Heo | 56de210 | 2013-02-27 17:04:01 -0800 | [diff] [blame] | 2781 | |
Andreas Gruenbacher | b6f85ef | 2011-07-06 15:03:31 +0200 | [diff] [blame] | 2782 | INIT_LIST_HEAD(&device->peer_devices); |
| 2783 | for_each_connection(connection, resource) { |
| 2784 | peer_device = kzalloc(sizeof(struct drbd_peer_device), GFP_KERNEL); |
| 2785 | if (!peer_device) |
| 2786 | goto out_idr_remove_from_resource; |
| 2787 | peer_device->connection = connection; |
| 2788 | peer_device->device = device; |
| 2789 | |
| 2790 | list_add(&peer_device->peer_devices, &device->peer_devices); |
| 2791 | kref_get(&device->kref); |
| 2792 | |
| 2793 | id = idr_alloc(&connection->peer_devices, peer_device, vnr, vnr + 1, GFP_KERNEL); |
| 2794 | if (id < 0) { |
| 2795 | if (id == -ENOSPC) { |
| 2796 | err = ERR_INVALID_REQUEST; |
| 2797 | drbd_msg_put_info("requested volume exists already"); |
| 2798 | } |
| 2799 | goto out_idr_remove_from_resource; |
Tejun Heo | 56de210 | 2013-02-27 17:04:01 -0800 | [diff] [blame] | 2800 | } |
Andreas Gruenbacher | b6f85ef | 2011-07-06 15:03:31 +0200 | [diff] [blame] | 2801 | kref_get(&connection->kref); |
Lars Ellenberg | 569083c | 2011-03-07 09:49:02 +0100 | [diff] [blame] | 2802 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2803 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2804 | if (init_submitter(device)) { |
Lars Ellenberg | 113fef9 | 2013-03-22 18:14:40 -0600 | [diff] [blame] | 2805 | err = ERR_NOMEM; |
| 2806 | drbd_msg_put_info("unable to create submit workqueue"); |
| 2807 | goto out_idr_remove_vol; |
| 2808 | } |
| 2809 | |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 2810 | add_disk(disk); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2811 | |
Philipp Reisner | 2325eb6 | 2011-03-15 16:56:18 +0100 | [diff] [blame] | 2812 | /* inherit the connection state */ |
Andreas Gruenbacher | b6f85ef | 2011-07-06 15:03:31 +0200 | [diff] [blame] | 2813 | device->state.conn = first_connection(resource)->cstate; |
Andreas Gruenbacher | 69a2277 | 2011-08-09 00:47:13 +0200 | [diff] [blame] | 2814 | if (device->state.conn == C_WF_REPORT_PARAMS) { |
| 2815 | for_each_peer_device(peer_device, device) |
| 2816 | drbd_connected(peer_device); |
| 2817 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2818 | |
Philipp Reisner | 774b305 | 2011-02-22 02:07:03 -0500 | [diff] [blame] | 2819 | return NO_ERROR; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2820 | |
Lars Ellenberg | 113fef9 | 2013-03-22 18:14:40 -0600 | [diff] [blame] | 2821 | out_idr_remove_vol: |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2822 | idr_remove(&connection->peer_devices, vnr); |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2823 | out_idr_remove_from_resource: |
Andreas Gruenbacher | b6f85ef | 2011-07-06 15:03:31 +0200 | [diff] [blame] | 2824 | for_each_connection(connection, resource) { |
| 2825 | peer_device = idr_find(&connection->peer_devices, vnr); |
| 2826 | if (peer_device) { |
| 2827 | idr_remove(&connection->peer_devices, vnr); |
| 2828 | kref_put(&connection->kref, drbd_destroy_connection); |
| 2829 | } |
| 2830 | } |
| 2831 | for_each_peer_device_safe(peer_device, tmp_peer_device, device) { |
| 2832 | list_del(&peer_device->peer_devices); |
| 2833 | kfree(peer_device); |
| 2834 | } |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2835 | idr_remove(&resource->devices, vnr); |
Lars Ellenberg | 8432b31 | 2011-03-08 16:11:16 +0100 | [diff] [blame] | 2836 | out_idr_remove_minor: |
Andreas Gruenbacher | 93e4bf7 | 2013-05-23 14:57:17 +0200 | [diff] [blame] | 2837 | idr_remove(&drbd_devices, minor); |
Lars Ellenberg | 569083c | 2011-03-07 09:49:02 +0100 | [diff] [blame] | 2838 | synchronize_rcu(); |
Lars Ellenberg | 8432b31 | 2011-03-08 16:11:16 +0100 | [diff] [blame] | 2839 | out_no_minor_idr: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2840 | drbd_bm_cleanup(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2841 | out_no_bitmap: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2842 | __free_page(device->md_io_page); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2843 | out_no_io_page: |
| 2844 | put_disk(disk); |
| 2845 | out_no_disk: |
| 2846 | blk_cleanup_queue(q); |
| 2847 | out_no_q: |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2848 | kref_put(&resource->kref, drbd_destroy_resource); |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 2849 | kfree(device); |
Lars Ellenberg | 8432b31 | 2011-03-08 16:11:16 +0100 | [diff] [blame] | 2850 | return err; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2851 | } |
| 2852 | |
Andreas Gruenbacher | f82795d | 2011-07-03 23:32:26 +0200 | [diff] [blame] | 2853 | void drbd_delete_device(struct drbd_device *device) |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2854 | { |
| 2855 | struct drbd_resource *resource = device->resource; |
| 2856 | struct drbd_connection *connection; |
| 2857 | int refs = 3; |
| 2858 | |
| 2859 | for_each_connection(connection, resource) { |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2860 | idr_remove(&connection->peer_devices, device->vnr); |
Andreas Gruenbacher | 803ea13 | 2011-06-09 01:40:48 +0200 | [diff] [blame] | 2861 | refs++; |
| 2862 | } |
| 2863 | idr_remove(&resource->devices, device->vnr); |
| 2864 | idr_remove(&drbd_devices, device_to_minor(device)); |
| 2865 | del_gendisk(device->vdisk); |
| 2866 | synchronize_rcu(); |
| 2867 | kref_sub(&device->kref, refs, drbd_destroy_device); |
| 2868 | } |
| 2869 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2870 | int __init drbd_init(void) |
| 2871 | { |
| 2872 | int err; |
| 2873 | |
Philipp Reisner | 2b8a90b | 2011-01-10 11:15:17 +0100 | [diff] [blame] | 2874 | if (minor_count < DRBD_MINOR_COUNT_MIN || minor_count > DRBD_MINOR_COUNT_MAX) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2875 | printk(KERN_ERR |
Philipp Reisner | 81a5d60 | 2011-02-22 19:53:16 -0500 | [diff] [blame] | 2876 | "drbd: invalid minor_count (%d)\n", minor_count); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2877 | #ifdef MODULE |
| 2878 | return -EINVAL; |
| 2879 | #else |
Andreas Gruenbacher | 46530e8 | 2011-05-31 13:08:53 +0200 | [diff] [blame] | 2880 | minor_count = DRBD_MINOR_COUNT_DEF; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2881 | #endif |
| 2882 | } |
| 2883 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2884 | err = register_blkdev(DRBD_MAJOR, "drbd"); |
| 2885 | if (err) { |
| 2886 | printk(KERN_ERR |
| 2887 | "drbd: unable to register block device major %d\n", |
| 2888 | DRBD_MAJOR); |
| 2889 | return err; |
| 2890 | } |
| 2891 | |
| 2892 | register_reboot_notifier(&drbd_notifier); |
| 2893 | |
| 2894 | /* |
| 2895 | * allocate all necessary structs |
| 2896 | */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2897 | init_waitqueue_head(&drbd_pp_wait); |
| 2898 | |
| 2899 | drbd_proc = NULL; /* play safe for drbd_cleanup */ |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 2900 | idr_init(&drbd_devices); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2901 | |
Lars Ellenberg | 69babf0 | 2013-10-23 10:59:15 +0200 | [diff] [blame] | 2902 | rwlock_init(&global_state_lock); |
Andreas Gruenbacher | 77c556f | 2011-06-08 22:17:38 +0200 | [diff] [blame] | 2903 | INIT_LIST_HEAD(&drbd_resources); |
Lars Ellenberg | 69babf0 | 2013-10-23 10:59:15 +0200 | [diff] [blame] | 2904 | |
| 2905 | err = drbd_genl_register(); |
| 2906 | if (err) { |
| 2907 | printk(KERN_ERR "drbd: unable to register generic netlink family\n"); |
| 2908 | goto fail; |
| 2909 | } |
| 2910 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2911 | err = drbd_create_mempools(); |
| 2912 | if (err) |
Lars Ellenberg | 3b98c0c | 2011-03-07 12:49:34 +0100 | [diff] [blame] | 2913 | goto fail; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2914 | |
Wei Yongjun | 6110d70 | 2013-06-25 16:50:04 +0200 | [diff] [blame] | 2915 | err = -ENOMEM; |
Lars Ellenberg | 8c484ee | 2010-03-11 16:47:58 +0100 | [diff] [blame] | 2916 | drbd_proc = proc_create_data("drbd", S_IFREG | S_IRUGO , NULL, &drbd_proc_fops, NULL); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2917 | if (!drbd_proc) { |
| 2918 | printk(KERN_ERR "drbd: unable to register proc file\n"); |
Lars Ellenberg | 3b98c0c | 2011-03-07 12:49:34 +0100 | [diff] [blame] | 2919 | goto fail; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2920 | } |
| 2921 | |
Lars Ellenberg | 2312f0b3 | 2011-11-24 10:36:25 +0100 | [diff] [blame] | 2922 | retry.wq = create_singlethread_workqueue("drbd-reissue"); |
| 2923 | if (!retry.wq) { |
| 2924 | printk(KERN_ERR "drbd: unable to create retry workqueue\n"); |
| 2925 | goto fail; |
| 2926 | } |
| 2927 | INIT_WORK(&retry.worker, do_retry); |
| 2928 | spin_lock_init(&retry.lock); |
| 2929 | INIT_LIST_HEAD(&retry.writes); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2930 | |
| 2931 | printk(KERN_INFO "drbd: initialized. " |
| 2932 | "Version: " REL_VERSION " (api:%d/proto:%d-%d)\n", |
| 2933 | API_VERSION, PRO_VERSION_MIN, PRO_VERSION_MAX); |
| 2934 | printk(KERN_INFO "drbd: %s\n", drbd_buildtag()); |
| 2935 | printk(KERN_INFO "drbd: registered as block device major %d\n", |
| 2936 | DRBD_MAJOR); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2937 | |
| 2938 | return 0; /* Success! */ |
| 2939 | |
Lars Ellenberg | 3b98c0c | 2011-03-07 12:49:34 +0100 | [diff] [blame] | 2940 | fail: |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2941 | drbd_cleanup(); |
| 2942 | if (err == -ENOMEM) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2943 | printk(KERN_ERR "drbd: ran out of memory\n"); |
| 2944 | else |
| 2945 | printk(KERN_ERR "drbd: initialization failure\n"); |
| 2946 | return err; |
| 2947 | } |
| 2948 | |
| 2949 | void drbd_free_bc(struct drbd_backing_dev *ldev) |
| 2950 | { |
| 2951 | if (ldev == NULL) |
| 2952 | return; |
| 2953 | |
Tejun Heo | e525fd8 | 2010-11-13 11:55:17 +0100 | [diff] [blame] | 2954 | blkdev_put(ldev->backing_bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); |
| 2955 | blkdev_put(ldev->md_bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2956 | |
Lars Ellenberg | 94ad0a1 | 2013-03-27 14:08:42 +0100 | [diff] [blame] | 2957 | kfree(ldev->disk_conf); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2958 | kfree(ldev); |
| 2959 | } |
| 2960 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2961 | void drbd_free_sock(struct drbd_connection *connection) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2962 | { |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2963 | if (connection->data.socket) { |
| 2964 | mutex_lock(&connection->data.mutex); |
| 2965 | kernel_sock_shutdown(connection->data.socket, SHUT_RDWR); |
| 2966 | sock_release(connection->data.socket); |
| 2967 | connection->data.socket = NULL; |
| 2968 | mutex_unlock(&connection->data.mutex); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2969 | } |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2970 | if (connection->meta.socket) { |
| 2971 | mutex_lock(&connection->meta.mutex); |
| 2972 | kernel_sock_shutdown(connection->meta.socket, SHUT_RDWR); |
| 2973 | sock_release(connection->meta.socket); |
| 2974 | connection->meta.socket = NULL; |
| 2975 | mutex_unlock(&connection->meta.mutex); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2976 | } |
| 2977 | } |
| 2978 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 2979 | /* meta data management */ |
| 2980 | |
Andreas Gruenbacher | bde89a9 | 2011-05-30 16:32:41 +0200 | [diff] [blame] | 2981 | void conn_md_sync(struct drbd_connection *connection) |
Philipp Reisner | 19fffd7 | 2012-08-28 16:48:03 +0200 | [diff] [blame] | 2982 | { |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2983 | struct drbd_peer_device *peer_device; |
Philipp Reisner | 19fffd7 | 2012-08-28 16:48:03 +0200 | [diff] [blame] | 2984 | int vnr; |
| 2985 | |
| 2986 | rcu_read_lock(); |
Andreas Gruenbacher | c06ece6 | 2011-06-21 17:23:59 +0200 | [diff] [blame] | 2987 | idr_for_each_entry(&connection->peer_devices, peer_device, vnr) { |
| 2988 | struct drbd_device *device = peer_device->device; |
| 2989 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2990 | kref_get(&device->kref); |
Philipp Reisner | 19fffd7 | 2012-08-28 16:48:03 +0200 | [diff] [blame] | 2991 | rcu_read_unlock(); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 2992 | drbd_md_sync(device); |
Andreas Gruenbacher | 05a10ec | 2011-06-07 22:54:17 +0200 | [diff] [blame] | 2993 | kref_put(&device->kref, drbd_destroy_device); |
Philipp Reisner | 19fffd7 | 2012-08-28 16:48:03 +0200 | [diff] [blame] | 2994 | rcu_read_lock(); |
| 2995 | } |
| 2996 | rcu_read_unlock(); |
| 2997 | } |
| 2998 | |
Lars Ellenberg | ae8bf31 | 2013-03-19 18:16:43 +0100 | [diff] [blame] | 2999 | /* aligned 4kByte */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3000 | struct meta_data_on_disk { |
Lars Ellenberg | cccac98 | 2013-03-19 18:16:46 +0100 | [diff] [blame] | 3001 | u64 la_size_sect; /* last agreed size. */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3002 | u64 uuid[UI_SIZE]; /* UUIDs. */ |
| 3003 | u64 device_uuid; |
| 3004 | u64 reserved_u64_1; |
| 3005 | u32 flags; /* MDF */ |
| 3006 | u32 magic; |
| 3007 | u32 md_size_sect; |
| 3008 | u32 al_offset; /* offset to this block */ |
Lars Ellenberg | ae8bf31 | 2013-03-19 18:16:43 +0100 | [diff] [blame] | 3009 | u32 al_nr_extents; /* important for restoring the AL (userspace) */ |
Lars Ellenberg | f399002 | 2011-03-23 14:31:09 +0100 | [diff] [blame] | 3010 | /* `-- act_log->nr_elements <-- ldev->dc.al_extents */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3011 | u32 bm_offset; /* offset to the bitmap, from here */ |
| 3012 | u32 bm_bytes_per_bit; /* BM_BLOCK_SIZE */ |
Philipp Reisner | 99432fc | 2011-05-20 16:39:13 +0200 | [diff] [blame] | 3013 | u32 la_peer_max_bio_size; /* last peer max_bio_size */ |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3014 | |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3015 | /* see al_tr_number_to_on_disk_sector() */ |
| 3016 | u32 al_stripes; |
| 3017 | u32 al_stripe_size_4k; |
| 3018 | |
| 3019 | u8 reserved_u8[4096 - (7*8 + 10*4)]; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3020 | } __packed; |
| 3021 | |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3022 | |
| 3023 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3024 | void drbd_md_write(struct drbd_device *device, void *b) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3025 | { |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3026 | struct meta_data_on_disk *buffer = b; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3027 | sector_t sector; |
| 3028 | int i; |
| 3029 | |
Lars Ellenberg | ae8bf31 | 2013-03-19 18:16:43 +0100 | [diff] [blame] | 3030 | memset(buffer, 0, sizeof(*buffer)); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3031 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3032 | buffer->la_size_sect = cpu_to_be64(drbd_get_capacity(device->this_bdev)); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3033 | for (i = UI_CURRENT; i < UI_SIZE; i++) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3034 | buffer->uuid[i] = cpu_to_be64(device->ldev->md.uuid[i]); |
| 3035 | buffer->flags = cpu_to_be32(device->ldev->md.flags); |
Lars Ellenberg | d5d7ebd | 2011-07-05 20:59:26 +0200 | [diff] [blame] | 3036 | buffer->magic = cpu_to_be32(DRBD_MD_MAGIC_84_UNCLEAN); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3037 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3038 | buffer->md_size_sect = cpu_to_be32(device->ldev->md.md_size_sect); |
| 3039 | buffer->al_offset = cpu_to_be32(device->ldev->md.al_offset); |
| 3040 | buffer->al_nr_extents = cpu_to_be32(device->act_log->nr_elements); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3041 | buffer->bm_bytes_per_bit = cpu_to_be32(BM_BLOCK_SIZE); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3042 | buffer->device_uuid = cpu_to_be64(device->ldev->md.device_uuid); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3043 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3044 | buffer->bm_offset = cpu_to_be32(device->ldev->md.bm_offset); |
| 3045 | buffer->la_peer_max_bio_size = cpu_to_be32(device->peer_max_bio_size); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3046 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3047 | buffer->al_stripes = cpu_to_be32(device->ldev->md.al_stripes); |
| 3048 | buffer->al_stripe_size_4k = cpu_to_be32(device->ldev->md.al_stripe_size_4k); |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3049 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 3050 | D_ASSERT(device, drbd_md_ss(device->ldev) == device->ldev->md.md_offset); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3051 | sector = device->ldev->md.md_offset; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3052 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3053 | if (drbd_md_sync_page_io(device, device->ldev, sector, WRITE)) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3054 | /* this was a try anyways ... */ |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3055 | drbd_err(device, "meta data update failed!\n"); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3056 | drbd_chk_io_error(device, 1, DRBD_META_IO_ERROR); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3057 | } |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3058 | } |
| 3059 | |
| 3060 | /** |
| 3061 | * drbd_md_sync() - Writes the meta data super block if the MD_DIRTY flag bit is set |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3062 | * @device: DRBD device. |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3063 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3064 | void drbd_md_sync(struct drbd_device *device) |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3065 | { |
| 3066 | struct meta_data_on_disk *buffer; |
| 3067 | |
| 3068 | /* Don't accidentally change the DRBD meta data layout. */ |
| 3069 | BUILD_BUG_ON(UI_SIZE != 4); |
| 3070 | BUILD_BUG_ON(sizeof(struct meta_data_on_disk) != 4096); |
| 3071 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3072 | del_timer(&device->md_sync_timer); |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3073 | /* timer may be rearmed by drbd_md_mark_dirty() now. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3074 | if (!test_and_clear_bit(MD_DIRTY, &device->flags)) |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3075 | return; |
| 3076 | |
| 3077 | /* We use here D_FAILED and not D_ATTACHING because we try to write |
| 3078 | * metadata even if we detach due to a disk failure! */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3079 | if (!get_ldev_if_state(device, D_FAILED)) |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3080 | return; |
| 3081 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3082 | buffer = drbd_md_get_buffer(device); |
Philipp Reisner | d752b26 | 2013-06-25 16:50:08 +0200 | [diff] [blame] | 3083 | if (!buffer) |
| 3084 | goto out; |
| 3085 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3086 | drbd_md_write(device, buffer); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3087 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3088 | /* Update device->ldev->md.la_size_sect, |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3089 | * since we updated it on metadata. */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3090 | device->ldev->md.la_size_sect = drbd_get_capacity(device->this_bdev); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3091 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3092 | drbd_md_put_buffer(device); |
Philipp Reisner | e171173 | 2011-06-27 11:51:46 +0200 | [diff] [blame] | 3093 | out: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3094 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3095 | } |
| 3096 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3097 | static int check_activity_log_stripe_size(struct drbd_device *device, |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3098 | struct meta_data_on_disk *on_disk, |
| 3099 | struct drbd_md *in_core) |
| 3100 | { |
| 3101 | u32 al_stripes = be32_to_cpu(on_disk->al_stripes); |
| 3102 | u32 al_stripe_size_4k = be32_to_cpu(on_disk->al_stripe_size_4k); |
| 3103 | u64 al_size_4k; |
| 3104 | |
| 3105 | /* both not set: default to old fixed size activity log */ |
| 3106 | if (al_stripes == 0 && al_stripe_size_4k == 0) { |
| 3107 | al_stripes = 1; |
| 3108 | al_stripe_size_4k = MD_32kB_SECT/8; |
| 3109 | } |
| 3110 | |
| 3111 | /* some paranoia plausibility checks */ |
| 3112 | |
| 3113 | /* we need both values to be set */ |
| 3114 | if (al_stripes == 0 || al_stripe_size_4k == 0) |
| 3115 | goto err; |
| 3116 | |
| 3117 | al_size_4k = (u64)al_stripes * al_stripe_size_4k; |
| 3118 | |
| 3119 | /* Upper limit of activity log area, to avoid potential overflow |
| 3120 | * problems in al_tr_number_to_on_disk_sector(). As right now, more |
| 3121 | * than 72 * 4k blocks total only increases the amount of history, |
| 3122 | * limiting this arbitrarily to 16 GB is not a real limitation ;-) */ |
| 3123 | if (al_size_4k > (16 * 1024 * 1024/4)) |
| 3124 | goto err; |
| 3125 | |
| 3126 | /* Lower limit: we need at least 8 transaction slots (32kB) |
| 3127 | * to not break existing setups */ |
| 3128 | if (al_size_4k < MD_32kB_SECT/8) |
| 3129 | goto err; |
| 3130 | |
| 3131 | in_core->al_stripe_size_4k = al_stripe_size_4k; |
| 3132 | in_core->al_stripes = al_stripes; |
| 3133 | in_core->al_size_4k = al_size_4k; |
| 3134 | |
| 3135 | return 0; |
| 3136 | err: |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3137 | drbd_err(device, "invalid activity log striping: al_stripes=%u, al_stripe_size_4k=%u\n", |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3138 | al_stripes, al_stripe_size_4k); |
| 3139 | return -EINVAL; |
| 3140 | } |
| 3141 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3142 | static int check_offsets_and_sizes(struct drbd_device *device, struct drbd_backing_dev *bdev) |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3143 | { |
| 3144 | sector_t capacity = drbd_get_capacity(bdev->md_bdev); |
| 3145 | struct drbd_md *in_core = &bdev->md; |
| 3146 | s32 on_disk_al_sect; |
| 3147 | s32 on_disk_bm_sect; |
| 3148 | |
| 3149 | /* The on-disk size of the activity log, calculated from offsets, and |
| 3150 | * the size of the activity log calculated from the stripe settings, |
| 3151 | * should match. |
| 3152 | * Though we could relax this a bit: it is ok, if the striped activity log |
| 3153 | * fits in the available on-disk activity log size. |
| 3154 | * Right now, that would break how resize is implemented. |
| 3155 | * TODO: make drbd_determine_dev_size() (and the drbdmeta tool) aware |
| 3156 | * of possible unused padding space in the on disk layout. */ |
| 3157 | if (in_core->al_offset < 0) { |
| 3158 | if (in_core->bm_offset > in_core->al_offset) |
| 3159 | goto err; |
| 3160 | on_disk_al_sect = -in_core->al_offset; |
| 3161 | on_disk_bm_sect = in_core->al_offset - in_core->bm_offset; |
| 3162 | } else { |
| 3163 | if (in_core->al_offset != MD_4kB_SECT) |
| 3164 | goto err; |
| 3165 | if (in_core->bm_offset < in_core->al_offset + in_core->al_size_4k * MD_4kB_SECT) |
| 3166 | goto err; |
| 3167 | |
| 3168 | on_disk_al_sect = in_core->bm_offset - MD_4kB_SECT; |
| 3169 | on_disk_bm_sect = in_core->md_size_sect - in_core->bm_offset; |
| 3170 | } |
| 3171 | |
| 3172 | /* old fixed size meta data is exactly that: fixed. */ |
| 3173 | if (in_core->meta_dev_idx >= 0) { |
| 3174 | if (in_core->md_size_sect != MD_128MB_SECT |
| 3175 | || in_core->al_offset != MD_4kB_SECT |
| 3176 | || in_core->bm_offset != MD_4kB_SECT + MD_32kB_SECT |
| 3177 | || in_core->al_stripes != 1 |
| 3178 | || in_core->al_stripe_size_4k != MD_32kB_SECT/8) |
| 3179 | goto err; |
| 3180 | } |
| 3181 | |
| 3182 | if (capacity < in_core->md_size_sect) |
| 3183 | goto err; |
| 3184 | if (capacity - in_core->md_size_sect < drbd_md_first_sector(bdev)) |
| 3185 | goto err; |
| 3186 | |
| 3187 | /* should be aligned, and at least 32k */ |
| 3188 | if ((on_disk_al_sect & 7) || (on_disk_al_sect < MD_32kB_SECT)) |
| 3189 | goto err; |
| 3190 | |
| 3191 | /* should fit (for now: exactly) into the available on-disk space; |
| 3192 | * overflow prevention is in check_activity_log_stripe_size() above. */ |
| 3193 | if (on_disk_al_sect != in_core->al_size_4k * MD_4kB_SECT) |
| 3194 | goto err; |
| 3195 | |
| 3196 | /* again, should be aligned */ |
| 3197 | if (in_core->bm_offset & 7) |
| 3198 | goto err; |
| 3199 | |
| 3200 | /* FIXME check for device grow with flex external meta data? */ |
| 3201 | |
| 3202 | /* can the available bitmap space cover the last agreed device size? */ |
| 3203 | if (on_disk_bm_sect < (in_core->la_size_sect+7)/MD_4kB_SECT/8/512) |
| 3204 | goto err; |
| 3205 | |
| 3206 | return 0; |
| 3207 | |
| 3208 | err: |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3209 | drbd_err(device, "meta data offsets don't make sense: idx=%d " |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3210 | "al_s=%u, al_sz4k=%u, al_offset=%d, bm_offset=%d, " |
| 3211 | "md_size_sect=%u, la_size=%llu, md_capacity=%llu\n", |
| 3212 | in_core->meta_dev_idx, |
| 3213 | in_core->al_stripes, in_core->al_stripe_size_4k, |
| 3214 | in_core->al_offset, in_core->bm_offset, in_core->md_size_sect, |
| 3215 | (unsigned long long)in_core->la_size_sect, |
| 3216 | (unsigned long long)capacity); |
| 3217 | |
| 3218 | return -EINVAL; |
| 3219 | } |
| 3220 | |
| 3221 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3222 | /** |
| 3223 | * drbd_md_read() - Reads in the meta data super block |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3224 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3225 | * @bdev: Device from which the meta data should be read in. |
| 3226 | * |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3227 | * Return NO_ERROR on success, and an enum drbd_ret_code in case |
Lars Ellenberg | d5d7ebd | 2011-07-05 20:59:26 +0200 | [diff] [blame] | 3228 | * something goes wrong. |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3229 | * |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3230 | * Called exactly once during drbd_adm_attach(), while still being D_DISKLESS, |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3231 | * even before @bdev is assigned to @device->ldev. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3232 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3233 | int drbd_md_read(struct drbd_device *device, struct drbd_backing_dev *bdev) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3234 | { |
| 3235 | struct meta_data_on_disk *buffer; |
Lars Ellenberg | d5d7ebd | 2011-07-05 20:59:26 +0200 | [diff] [blame] | 3236 | u32 magic, flags; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3237 | int i, rv = NO_ERROR; |
| 3238 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3239 | if (device->state.disk != D_DISKLESS) |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3240 | return ERR_DISK_CONFIGURED; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3241 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3242 | buffer = drbd_md_get_buffer(device); |
Philipp Reisner | e171173 | 2011-06-27 11:51:46 +0200 | [diff] [blame] | 3243 | if (!buffer) |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3244 | return ERR_NOMEM; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3245 | |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3246 | /* First, figure out where our meta data superblock is located, |
| 3247 | * and read it. */ |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3248 | bdev->md.meta_dev_idx = bdev->disk_conf->meta_dev_idx; |
| 3249 | bdev->md.md_offset = drbd_md_ss(bdev); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3250 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3251 | if (drbd_md_sync_page_io(device, bdev, bdev->md.md_offset, READ)) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3252 | /* NOTE: can't do normal error processing here as this is |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3253 | called BEFORE disk is attached */ |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3254 | drbd_err(device, "Error while reading metadata.\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3255 | rv = ERR_IO_MD_DISK; |
| 3256 | goto err; |
| 3257 | } |
| 3258 | |
Lars Ellenberg | d5d7ebd | 2011-07-05 20:59:26 +0200 | [diff] [blame] | 3259 | magic = be32_to_cpu(buffer->magic); |
| 3260 | flags = be32_to_cpu(buffer->flags); |
| 3261 | if (magic == DRBD_MD_MAGIC_84_UNCLEAN || |
| 3262 | (magic == DRBD_MD_MAGIC_08 && !(flags & MDF_AL_CLEAN))) { |
| 3263 | /* btw: that's Activity Log clean, not "all" clean. */ |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3264 | drbd_err(device, "Found unclean meta data. Did you \"drbdadm apply-al\"?\n"); |
Lars Ellenberg | d5d7ebd | 2011-07-05 20:59:26 +0200 | [diff] [blame] | 3265 | rv = ERR_MD_UNCLEAN; |
| 3266 | goto err; |
| 3267 | } |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3268 | |
| 3269 | rv = ERR_MD_INVALID; |
Lars Ellenberg | d5d7ebd | 2011-07-05 20:59:26 +0200 | [diff] [blame] | 3270 | if (magic != DRBD_MD_MAGIC_08) { |
Philipp Reisner | 43de7c8 | 2011-11-10 13:16:13 +0100 | [diff] [blame] | 3271 | if (magic == DRBD_MD_MAGIC_07) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3272 | drbd_err(device, "Found old (0.7) meta data magic. Did you \"drbdadm create-md\"?\n"); |
Lars Ellenberg | d5d7ebd | 2011-07-05 20:59:26 +0200 | [diff] [blame] | 3273 | else |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3274 | drbd_err(device, "Meta data magic not found. Did you \"drbdadm create-md\"?\n"); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3275 | goto err; |
| 3276 | } |
| 3277 | |
| 3278 | if (be32_to_cpu(buffer->bm_bytes_per_bit) != BM_BLOCK_SIZE) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3279 | drbd_err(device, "unexpected bm_bytes_per_bit: %u (expected %u)\n", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3280 | be32_to_cpu(buffer->bm_bytes_per_bit), BM_BLOCK_SIZE); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3281 | goto err; |
| 3282 | } |
| 3283 | |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3284 | |
| 3285 | /* convert to in_core endian */ |
| 3286 | bdev->md.la_size_sect = be64_to_cpu(buffer->la_size_sect); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3287 | for (i = UI_CURRENT; i < UI_SIZE; i++) |
| 3288 | bdev->md.uuid[i] = be64_to_cpu(buffer->uuid[i]); |
| 3289 | bdev->md.flags = be32_to_cpu(buffer->flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3290 | bdev->md.device_uuid = be64_to_cpu(buffer->device_uuid); |
| 3291 | |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3292 | bdev->md.md_size_sect = be32_to_cpu(buffer->md_size_sect); |
| 3293 | bdev->md.al_offset = be32_to_cpu(buffer->al_offset); |
| 3294 | bdev->md.bm_offset = be32_to_cpu(buffer->bm_offset); |
| 3295 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3296 | if (check_activity_log_stripe_size(device, buffer, &bdev->md)) |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3297 | goto err; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3298 | if (check_offsets_and_sizes(device, bdev)) |
Lars Ellenberg | c04ccaa | 2013-03-19 18:16:47 +0100 | [diff] [blame] | 3299 | goto err; |
| 3300 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3301 | if (be32_to_cpu(buffer->bm_offset) != bdev->md.bm_offset) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3302 | drbd_err(device, "unexpected bm_offset: %d (expected %d)\n", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3303 | be32_to_cpu(buffer->bm_offset), bdev->md.bm_offset); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3304 | goto err; |
| 3305 | } |
| 3306 | if (be32_to_cpu(buffer->md_size_sect) != bdev->md.md_size_sect) { |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3307 | drbd_err(device, "unexpected md_size: %u (expected %u)\n", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3308 | be32_to_cpu(buffer->md_size_sect), bdev->md.md_size_sect); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3309 | goto err; |
| 3310 | } |
| 3311 | |
Lars Ellenberg | 3a4d4eb | 2013-03-19 18:16:44 +0100 | [diff] [blame] | 3312 | rv = NO_ERROR; |
| 3313 | |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 3314 | spin_lock_irq(&device->resource->req_lock); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3315 | if (device->state.conn < C_CONNECTED) { |
Lars Ellenberg | db141b2 | 2012-06-25 19:15:58 +0200 | [diff] [blame] | 3316 | unsigned int peer; |
Philipp Reisner | 99432fc | 2011-05-20 16:39:13 +0200 | [diff] [blame] | 3317 | peer = be32_to_cpu(buffer->la_peer_max_bio_size); |
Lars Ellenberg | db141b2 | 2012-06-25 19:15:58 +0200 | [diff] [blame] | 3318 | peer = max(peer, DRBD_MAX_BIO_SIZE_SAFE); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3319 | device->peer_max_bio_size = peer; |
Philipp Reisner | 99432fc | 2011-05-20 16:39:13 +0200 | [diff] [blame] | 3320 | } |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 3321 | spin_unlock_irq(&device->resource->req_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3322 | |
| 3323 | err: |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3324 | drbd_md_put_buffer(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3325 | |
| 3326 | return rv; |
| 3327 | } |
| 3328 | |
| 3329 | /** |
| 3330 | * drbd_md_mark_dirty() - Mark meta data super block as dirty |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3331 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3332 | * |
| 3333 | * Call this function if you change anything that should be written to |
| 3334 | * the meta-data super block. This function sets MD_DIRTY, and starts a |
| 3335 | * timer that ensures that within five seconds you have to call drbd_md_sync(). |
| 3336 | */ |
Lars Ellenberg | ca0e609 | 2010-10-14 15:01:21 +0200 | [diff] [blame] | 3337 | #ifdef DEBUG |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3338 | void drbd_md_mark_dirty_(struct drbd_device *device, unsigned int line, const char *func) |
Lars Ellenberg | ee15b03 | 2010-09-03 10:00:09 +0200 | [diff] [blame] | 3339 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3340 | if (!test_and_set_bit(MD_DIRTY, &device->flags)) { |
| 3341 | mod_timer(&device->md_sync_timer, jiffies + HZ); |
| 3342 | device->last_md_mark_dirty.line = line; |
| 3343 | device->last_md_mark_dirty.func = func; |
Lars Ellenberg | ee15b03 | 2010-09-03 10:00:09 +0200 | [diff] [blame] | 3344 | } |
| 3345 | } |
| 3346 | #else |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3347 | void drbd_md_mark_dirty(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3348 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3349 | if (!test_and_set_bit(MD_DIRTY, &device->flags)) |
| 3350 | mod_timer(&device->md_sync_timer, jiffies + 5*HZ); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3351 | } |
Lars Ellenberg | ee15b03 | 2010-09-03 10:00:09 +0200 | [diff] [blame] | 3352 | #endif |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3353 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3354 | void drbd_uuid_move_history(struct drbd_device *device) __must_hold(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3355 | { |
| 3356 | int i; |
| 3357 | |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 3358 | for (i = UI_HISTORY_START; i < UI_HISTORY_END; i++) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3359 | device->ldev->md.uuid[i+1] = device->ldev->md.uuid[i]; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3360 | } |
| 3361 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3362 | void __drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must_hold(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3363 | { |
| 3364 | if (idx == UI_CURRENT) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3365 | if (device->state.role == R_PRIMARY) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3366 | val |= 1; |
| 3367 | else |
| 3368 | val &= ~((u64)1); |
| 3369 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3370 | drbd_set_ed_uuid(device, val); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3371 | } |
| 3372 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3373 | device->ldev->md.uuid[idx] = val; |
| 3374 | drbd_md_mark_dirty(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3375 | } |
| 3376 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3377 | void _drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must_hold(local) |
Philipp Reisner | 9f2247b | 2012-08-16 14:25:58 +0200 | [diff] [blame] | 3378 | { |
| 3379 | unsigned long flags; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3380 | spin_lock_irqsave(&device->ldev->md.uuid_lock, flags); |
| 3381 | __drbd_uuid_set(device, idx, val); |
| 3382 | spin_unlock_irqrestore(&device->ldev->md.uuid_lock, flags); |
Philipp Reisner | 9f2247b | 2012-08-16 14:25:58 +0200 | [diff] [blame] | 3383 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3384 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3385 | void drbd_uuid_set(struct drbd_device *device, int idx, u64 val) __must_hold(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3386 | { |
Philipp Reisner | 9f2247b | 2012-08-16 14:25:58 +0200 | [diff] [blame] | 3387 | unsigned long flags; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3388 | spin_lock_irqsave(&device->ldev->md.uuid_lock, flags); |
| 3389 | if (device->ldev->md.uuid[idx]) { |
| 3390 | drbd_uuid_move_history(device); |
| 3391 | device->ldev->md.uuid[UI_HISTORY_START] = device->ldev->md.uuid[idx]; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3392 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3393 | __drbd_uuid_set(device, idx, val); |
| 3394 | spin_unlock_irqrestore(&device->ldev->md.uuid_lock, flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3395 | } |
| 3396 | |
| 3397 | /** |
| 3398 | * drbd_uuid_new_current() - Creates a new current UUID |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3399 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3400 | * |
| 3401 | * Creates a new current UUID, and rotates the old current UUID into |
| 3402 | * the bitmap slot. Causes an incremental resync upon next connect. |
| 3403 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3404 | void drbd_uuid_new_current(struct drbd_device *device) __must_hold(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3405 | { |
| 3406 | u64 val; |
Philipp Reisner | 9f2247b | 2012-08-16 14:25:58 +0200 | [diff] [blame] | 3407 | unsigned long long bm_uuid; |
| 3408 | |
| 3409 | get_random_bytes(&val, sizeof(u64)); |
| 3410 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3411 | spin_lock_irq(&device->ldev->md.uuid_lock); |
| 3412 | bm_uuid = device->ldev->md.uuid[UI_BITMAP]; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3413 | |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 3414 | if (bm_uuid) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3415 | drbd_warn(device, "bm UUID was already set: %llX\n", bm_uuid); |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 3416 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3417 | device->ldev->md.uuid[UI_BITMAP] = device->ldev->md.uuid[UI_CURRENT]; |
| 3418 | __drbd_uuid_set(device, UI_CURRENT, val); |
| 3419 | spin_unlock_irq(&device->ldev->md.uuid_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3420 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3421 | drbd_print_uuids(device, "new current UUID"); |
Lars Ellenberg | aaa8e2b | 2010-10-15 13:16:53 +0200 | [diff] [blame] | 3422 | /* get it to stable storage _now_ */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3423 | drbd_md_sync(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3424 | } |
| 3425 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3426 | void drbd_uuid_set_bm(struct drbd_device *device, u64 val) __must_hold(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3427 | { |
Philipp Reisner | 9f2247b | 2012-08-16 14:25:58 +0200 | [diff] [blame] | 3428 | unsigned long flags; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3429 | if (device->ldev->md.uuid[UI_BITMAP] == 0 && val == 0) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3430 | return; |
| 3431 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3432 | spin_lock_irqsave(&device->ldev->md.uuid_lock, flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3433 | if (val == 0) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3434 | drbd_uuid_move_history(device); |
| 3435 | device->ldev->md.uuid[UI_HISTORY_START] = device->ldev->md.uuid[UI_BITMAP]; |
| 3436 | device->ldev->md.uuid[UI_BITMAP] = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3437 | } else { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3438 | unsigned long long bm_uuid = device->ldev->md.uuid[UI_BITMAP]; |
Lars Ellenberg | 62b0da3 | 2011-01-20 13:25:21 +0100 | [diff] [blame] | 3439 | if (bm_uuid) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3440 | drbd_warn(device, "bm UUID was already set: %llX\n", bm_uuid); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3441 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3442 | device->ldev->md.uuid[UI_BITMAP] = val & ~((u64)1); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3443 | } |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3444 | spin_unlock_irqrestore(&device->ldev->md.uuid_lock, flags); |
Philipp Reisner | 9f2247b | 2012-08-16 14:25:58 +0200 | [diff] [blame] | 3445 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3446 | drbd_md_mark_dirty(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3447 | } |
| 3448 | |
| 3449 | /** |
| 3450 | * drbd_bmio_set_n_write() - io_fn for drbd_queue_bitmap_io() or drbd_bitmap_io() |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3451 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3452 | * |
| 3453 | * Sets all bits in the bitmap and writes the whole bitmap to stable storage. |
| 3454 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3455 | int drbd_bmio_set_n_write(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3456 | { |
| 3457 | int rv = -EIO; |
| 3458 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3459 | if (get_ldev_if_state(device, D_ATTACHING)) { |
| 3460 | drbd_md_set_flag(device, MDF_FULL_SYNC); |
| 3461 | drbd_md_sync(device); |
| 3462 | drbd_bm_set_all(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3463 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3464 | rv = drbd_bm_write(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3465 | |
| 3466 | if (!rv) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3467 | drbd_md_clear_flag(device, MDF_FULL_SYNC); |
| 3468 | drbd_md_sync(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3469 | } |
| 3470 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3471 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3472 | } |
| 3473 | |
| 3474 | return rv; |
| 3475 | } |
| 3476 | |
| 3477 | /** |
| 3478 | * drbd_bmio_clear_n_write() - io_fn for drbd_queue_bitmap_io() or drbd_bitmap_io() |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3479 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3480 | * |
| 3481 | * Clears all bits in the bitmap and writes the whole bitmap to stable storage. |
| 3482 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3483 | int drbd_bmio_clear_n_write(struct drbd_device *device) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3484 | { |
| 3485 | int rv = -EIO; |
| 3486 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3487 | drbd_resume_al(device); |
| 3488 | if (get_ldev_if_state(device, D_ATTACHING)) { |
| 3489 | drbd_bm_clear_all(device); |
| 3490 | rv = drbd_bm_write(device); |
| 3491 | put_ldev(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3492 | } |
| 3493 | |
| 3494 | return rv; |
| 3495 | } |
| 3496 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 3497 | static int w_bitmap_io(struct drbd_work *w, int unused) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3498 | { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 3499 | struct drbd_device *device = |
| 3500 | container_of(w, struct drbd_device, bm_io_work.w); |
| 3501 | struct bm_io_work *work = &device->bm_io_work; |
Lars Ellenberg | 02851e9 | 2010-12-16 14:47:39 +0100 | [diff] [blame] | 3502 | int rv = -EIO; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3503 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 3504 | D_ASSERT(device, atomic_read(&device->ap_bio_cnt) == 0); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3505 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3506 | if (get_ldev(device)) { |
| 3507 | drbd_bm_lock(device, work->why, work->flags); |
| 3508 | rv = work->io_fn(device); |
| 3509 | drbd_bm_unlock(device); |
| 3510 | put_ldev(device); |
Lars Ellenberg | 02851e9 | 2010-12-16 14:47:39 +0100 | [diff] [blame] | 3511 | } |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3512 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3513 | clear_bit_unlock(BITMAP_IO, &device->flags); |
| 3514 | wake_up(&device->misc_wait); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3515 | |
| 3516 | if (work->done) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3517 | work->done(device, rv); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3518 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3519 | clear_bit(BITMAP_IO_QUEUED, &device->flags); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3520 | work->why = NULL; |
Lars Ellenberg | 20ceb2b | 2011-01-21 10:56:44 +0100 | [diff] [blame] | 3521 | work->flags = 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3522 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 3523 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3524 | } |
| 3525 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3526 | void drbd_ldev_destroy(struct drbd_device *device) |
Lars Ellenberg | 82f59cc | 2010-10-16 12:13:47 +0200 | [diff] [blame] | 3527 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3528 | lc_destroy(device->resync); |
| 3529 | device->resync = NULL; |
| 3530 | lc_destroy(device->act_log); |
| 3531 | device->act_log = NULL; |
Lars Ellenberg | 82f59cc | 2010-10-16 12:13:47 +0200 | [diff] [blame] | 3532 | __no_warn(local, |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3533 | drbd_free_bc(device->ldev); |
| 3534 | device->ldev = NULL;); |
Lars Ellenberg | 82f59cc | 2010-10-16 12:13:47 +0200 | [diff] [blame] | 3535 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3536 | clear_bit(GO_DISKLESS, &device->flags); |
Lars Ellenberg | 82f59cc | 2010-10-16 12:13:47 +0200 | [diff] [blame] | 3537 | } |
| 3538 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 3539 | static int w_go_diskless(struct drbd_work *w, int unused) |
Lars Ellenberg | e9e6f3e | 2010-09-14 20:26:27 +0200 | [diff] [blame] | 3540 | { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 3541 | struct drbd_device *device = |
| 3542 | container_of(w, struct drbd_device, go_diskless); |
Philipp Reisner | 00d5694 | 2011-02-09 18:09:48 +0100 | [diff] [blame] | 3543 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 3544 | D_ASSERT(device, device->state.disk == D_FAILED); |
Lars Ellenberg | 9d28287 | 2010-10-14 13:57:07 +0200 | [diff] [blame] | 3545 | /* we cannot assert local_cnt == 0 here, as get_ldev_if_state will |
| 3546 | * inc/dec it frequently. Once we are D_DISKLESS, no one will touch |
Lars Ellenberg | 82f59cc | 2010-10-16 12:13:47 +0200 | [diff] [blame] | 3547 | * the protected members anymore, though, so once put_ldev reaches zero |
| 3548 | * again, it will be safe to free them. */ |
Lars Ellenberg | a2a3c74f | 2012-09-22 12:26:57 +0200 | [diff] [blame] | 3549 | |
| 3550 | /* Try to write changed bitmap pages, read errors may have just |
| 3551 | * set some bits outside the area covered by the activity log. |
| 3552 | * |
| 3553 | * If we have an IO error during the bitmap writeout, |
| 3554 | * we will want a full sync next time, just in case. |
| 3555 | * (Do we want a specific meta data flag for this?) |
| 3556 | * |
| 3557 | * If that does not make it to stable storage either, |
Philipp Reisner | fd0017c | 2012-10-19 14:19:23 +0200 | [diff] [blame] | 3558 | * we cannot do anything about that anymore. |
| 3559 | * |
| 3560 | * We still need to check if both bitmap and ldev are present, we may |
| 3561 | * end up here after a failed attach, before ldev was even assigned. |
| 3562 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3563 | if (device->bitmap && device->ldev) { |
Philipp Reisner | bb45185 | 2013-03-27 14:08:39 +0100 | [diff] [blame] | 3564 | /* An interrupted resync or similar is allowed to recounts bits |
| 3565 | * while we detach. |
| 3566 | * Any modifications would not be expected anymore, though. |
| 3567 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3568 | if (drbd_bitmap_io_from_worker(device, drbd_bm_write, |
Philipp Reisner | bb45185 | 2013-03-27 14:08:39 +0100 | [diff] [blame] | 3569 | "detach", BM_LOCKED_TEST_ALLOWED)) { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3570 | if (test_bit(WAS_READ_ERROR, &device->flags)) { |
| 3571 | drbd_md_set_flag(device, MDF_FULL_SYNC); |
| 3572 | drbd_md_sync(device); |
Lars Ellenberg | a2a3c74f | 2012-09-22 12:26:57 +0200 | [diff] [blame] | 3573 | } |
| 3574 | } |
| 3575 | } |
| 3576 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3577 | drbd_force_state(device, NS(disk, D_DISKLESS)); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 3578 | return 0; |
Lars Ellenberg | e9e6f3e | 2010-09-14 20:26:27 +0200 | [diff] [blame] | 3579 | } |
| 3580 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3581 | /** |
| 3582 | * drbd_queue_bitmap_io() - Queues an IO operation on the whole bitmap |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3583 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3584 | * @io_fn: IO callback to be called when bitmap IO is possible |
| 3585 | * @done: callback to be called after the bitmap IO was performed |
| 3586 | * @why: Descriptive text of the reason for doing the IO |
| 3587 | * |
| 3588 | * While IO on the bitmap happens we freeze application IO thus we ensure |
| 3589 | * that drbd_set_out_of_sync() can not be called. This function MAY ONLY be |
| 3590 | * called from worker context. It MUST NOT be used while a previous such |
| 3591 | * work is still pending! |
| 3592 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3593 | void drbd_queue_bitmap_io(struct drbd_device *device, |
Andreas Gruenbacher | 5476169 | 2011-05-30 16:15:21 +0200 | [diff] [blame] | 3594 | int (*io_fn)(struct drbd_device *), |
| 3595 | void (*done)(struct drbd_device *, int), |
Lars Ellenberg | 20ceb2b | 2011-01-21 10:56:44 +0100 | [diff] [blame] | 3596 | char *why, enum bm_flag flags) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3597 | { |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 3598 | D_ASSERT(device, current == first_peer_device(device)->connection->worker.task); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3599 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 3600 | D_ASSERT(device, !test_bit(BITMAP_IO_QUEUED, &device->flags)); |
| 3601 | D_ASSERT(device, !test_bit(BITMAP_IO, &device->flags)); |
| 3602 | D_ASSERT(device, list_empty(&device->bm_io_work.w.list)); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3603 | if (device->bm_io_work.why) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3604 | drbd_err(device, "FIXME going to queue '%s' but '%s' still pending?\n", |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3605 | why, device->bm_io_work.why); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3606 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3607 | device->bm_io_work.io_fn = io_fn; |
| 3608 | device->bm_io_work.done = done; |
| 3609 | device->bm_io_work.why = why; |
| 3610 | device->bm_io_work.flags = flags; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3611 | |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 3612 | spin_lock_irq(&device->resource->req_lock); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3613 | set_bit(BITMAP_IO, &device->flags); |
| 3614 | if (atomic_read(&device->ap_bio_cnt) == 0) { |
| 3615 | if (!test_and_set_bit(BITMAP_IO_QUEUED, &device->flags)) |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 3616 | drbd_queue_work(&first_peer_device(device)->connection->sender_work, |
| 3617 | &device->bm_io_work.w); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3618 | } |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 3619 | spin_unlock_irq(&device->resource->req_lock); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3620 | } |
| 3621 | |
| 3622 | /** |
| 3623 | * drbd_bitmap_io() - Does an IO operation on the whole bitmap |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3624 | * @device: DRBD device. |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3625 | * @io_fn: IO callback to be called when bitmap IO is possible |
| 3626 | * @why: Descriptive text of the reason for doing the IO |
| 3627 | * |
| 3628 | * freezes application IO while that the actual IO operations runs. This |
| 3629 | * functions MAY NOT be called from worker context. |
| 3630 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3631 | int drbd_bitmap_io(struct drbd_device *device, int (*io_fn)(struct drbd_device *), |
Lars Ellenberg | 20ceb2b | 2011-01-21 10:56:44 +0100 | [diff] [blame] | 3632 | char *why, enum bm_flag flags) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3633 | { |
| 3634 | int rv; |
| 3635 | |
Andreas Gruenbacher | 0b0ba1e | 2011-06-27 16:23:33 +0200 | [diff] [blame] | 3636 | D_ASSERT(device, current != first_peer_device(device)->connection->worker.task); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3637 | |
Lars Ellenberg | 20ceb2b | 2011-01-21 10:56:44 +0100 | [diff] [blame] | 3638 | if ((flags & BM_LOCKED_SET_ALLOWED) == 0) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3639 | drbd_suspend_io(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3640 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3641 | drbd_bm_lock(device, why, flags); |
| 3642 | rv = io_fn(device); |
| 3643 | drbd_bm_unlock(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3644 | |
Lars Ellenberg | 20ceb2b | 2011-01-21 10:56:44 +0100 | [diff] [blame] | 3645 | if ((flags & BM_LOCKED_SET_ALLOWED) == 0) |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3646 | drbd_resume_io(device); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3647 | |
| 3648 | return rv; |
| 3649 | } |
| 3650 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3651 | void drbd_md_set_flag(struct drbd_device *device, int flag) __must_hold(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3652 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3653 | if ((device->ldev->md.flags & flag) != flag) { |
| 3654 | drbd_md_mark_dirty(device); |
| 3655 | device->ldev->md.flags |= flag; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3656 | } |
| 3657 | } |
| 3658 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3659 | void drbd_md_clear_flag(struct drbd_device *device, int flag) __must_hold(local) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3660 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3661 | if ((device->ldev->md.flags & flag) != 0) { |
| 3662 | drbd_md_mark_dirty(device); |
| 3663 | device->ldev->md.flags &= ~flag; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3664 | } |
| 3665 | } |
| 3666 | int drbd_md_test_flag(struct drbd_backing_dev *bdev, int flag) |
| 3667 | { |
| 3668 | return (bdev->md.flags & flag) != 0; |
| 3669 | } |
| 3670 | |
| 3671 | static void md_sync_timer_fn(unsigned long data) |
| 3672 | { |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3673 | struct drbd_device *device = (struct drbd_device *) data; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3674 | |
Lars Ellenberg | b792b65 | 2012-08-22 14:59:06 +0200 | [diff] [blame] | 3675 | /* must not double-queue! */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3676 | if (list_empty(&device->md_sync_work.list)) |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 3677 | drbd_queue_work_front(&first_peer_device(device)->connection->sender_work, |
| 3678 | &device->md_sync_work); |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3679 | } |
| 3680 | |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 3681 | static int w_md_sync(struct drbd_work *w, int unused) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3682 | { |
Andreas Gruenbacher | 84b8c06 | 2011-07-28 15:27:51 +0200 | [diff] [blame] | 3683 | struct drbd_device *device = |
| 3684 | container_of(w, struct drbd_device, md_sync_work); |
Philipp Reisner | 00d5694 | 2011-02-09 18:09:48 +0100 | [diff] [blame] | 3685 | |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3686 | drbd_warn(device, "md_sync_timer expired! Worker calls drbd_md_sync().\n"); |
Lars Ellenberg | ee15b03 | 2010-09-03 10:00:09 +0200 | [diff] [blame] | 3687 | #ifdef DEBUG |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3688 | drbd_warn(device, "last md_mark_dirty: %s:%u\n", |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3689 | device->last_md_mark_dirty.func, device->last_md_mark_dirty.line); |
Lars Ellenberg | ee15b03 | 2010-09-03 10:00:09 +0200 | [diff] [blame] | 3690 | #endif |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3691 | drbd_md_sync(device); |
Andreas Gruenbacher | 99920dc | 2011-03-16 15:31:39 +0100 | [diff] [blame] | 3692 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3693 | } |
| 3694 | |
Andreas Gruenbacher | d876302 | 2011-01-26 17:39:41 +0100 | [diff] [blame] | 3695 | const char *cmdname(enum drbd_packet cmd) |
Andreas Gruenbacher | f2ad906 | 2011-01-26 17:13:25 +0100 | [diff] [blame] | 3696 | { |
| 3697 | /* THINK may need to become several global tables |
| 3698 | * when we want to support more than |
| 3699 | * one PRO_VERSION */ |
| 3700 | static const char *cmdnames[] = { |
| 3701 | [P_DATA] = "Data", |
| 3702 | [P_DATA_REPLY] = "DataReply", |
| 3703 | [P_RS_DATA_REPLY] = "RSDataReply", |
| 3704 | [P_BARRIER] = "Barrier", |
| 3705 | [P_BITMAP] = "ReportBitMap", |
| 3706 | [P_BECOME_SYNC_TARGET] = "BecomeSyncTarget", |
| 3707 | [P_BECOME_SYNC_SOURCE] = "BecomeSyncSource", |
| 3708 | [P_UNPLUG_REMOTE] = "UnplugRemote", |
| 3709 | [P_DATA_REQUEST] = "DataRequest", |
| 3710 | [P_RS_DATA_REQUEST] = "RSDataRequest", |
| 3711 | [P_SYNC_PARAM] = "SyncParam", |
| 3712 | [P_SYNC_PARAM89] = "SyncParam89", |
| 3713 | [P_PROTOCOL] = "ReportProtocol", |
| 3714 | [P_UUIDS] = "ReportUUIDs", |
| 3715 | [P_SIZES] = "ReportSizes", |
| 3716 | [P_STATE] = "ReportState", |
| 3717 | [P_SYNC_UUID] = "ReportSyncUUID", |
| 3718 | [P_AUTH_CHALLENGE] = "AuthChallenge", |
| 3719 | [P_AUTH_RESPONSE] = "AuthResponse", |
| 3720 | [P_PING] = "Ping", |
| 3721 | [P_PING_ACK] = "PingAck", |
| 3722 | [P_RECV_ACK] = "RecvAck", |
| 3723 | [P_WRITE_ACK] = "WriteAck", |
| 3724 | [P_RS_WRITE_ACK] = "RSWriteAck", |
Lars Ellenberg | d4dabbe | 2012-08-01 12:33:51 +0200 | [diff] [blame] | 3725 | [P_SUPERSEDED] = "Superseded", |
Andreas Gruenbacher | f2ad906 | 2011-01-26 17:13:25 +0100 | [diff] [blame] | 3726 | [P_NEG_ACK] = "NegAck", |
| 3727 | [P_NEG_DREPLY] = "NegDReply", |
| 3728 | [P_NEG_RS_DREPLY] = "NegRSDReply", |
| 3729 | [P_BARRIER_ACK] = "BarrierAck", |
| 3730 | [P_STATE_CHG_REQ] = "StateChgRequest", |
| 3731 | [P_STATE_CHG_REPLY] = "StateChgReply", |
| 3732 | [P_OV_REQUEST] = "OVRequest", |
| 3733 | [P_OV_REPLY] = "OVReply", |
| 3734 | [P_OV_RESULT] = "OVResult", |
| 3735 | [P_CSUM_RS_REQUEST] = "CsumRSRequest", |
| 3736 | [P_RS_IS_IN_SYNC] = "CsumRSIsInSync", |
| 3737 | [P_COMPRESSED_BITMAP] = "CBitmap", |
| 3738 | [P_DELAY_PROBE] = "DelayProbe", |
| 3739 | [P_OUT_OF_SYNC] = "OutOfSync", |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3740 | [P_RETRY_WRITE] = "RetryWrite", |
Lars Ellenberg | ae25b33 | 2011-04-24 00:01:16 +0200 | [diff] [blame] | 3741 | [P_RS_CANCEL] = "RSCancel", |
| 3742 | [P_CONN_ST_CHG_REQ] = "conn_st_chg_req", |
| 3743 | [P_CONN_ST_CHG_REPLY] = "conn_st_chg_reply", |
Philipp Reisner | 036b17e | 2011-05-16 17:38:11 +0200 | [diff] [blame] | 3744 | [P_RETRY_WRITE] = "retry_write", |
| 3745 | [P_PROTOCOL_UPDATE] = "protocol_update", |
Lars Ellenberg | ae25b33 | 2011-04-24 00:01:16 +0200 | [diff] [blame] | 3746 | |
| 3747 | /* enum drbd_packet, but not commands - obsoleted flags: |
| 3748 | * P_MAY_IGNORE |
| 3749 | * P_MAX_OPT_CMD |
| 3750 | */ |
Andreas Gruenbacher | f2ad906 | 2011-01-26 17:13:25 +0100 | [diff] [blame] | 3751 | }; |
| 3752 | |
Lars Ellenberg | ae25b33 | 2011-04-24 00:01:16 +0200 | [diff] [blame] | 3753 | /* too big for the array: 0xfffX */ |
Andreas Gruenbacher | e5d6f33 | 2011-03-28 16:44:40 +0200 | [diff] [blame] | 3754 | if (cmd == P_INITIAL_META) |
| 3755 | return "InitialMeta"; |
| 3756 | if (cmd == P_INITIAL_DATA) |
| 3757 | return "InitialData"; |
Andreas Gruenbacher | 6038178 | 2011-03-28 17:05:50 +0200 | [diff] [blame] | 3758 | if (cmd == P_CONNECTION_FEATURES) |
| 3759 | return "ConnectionFeatures"; |
Andreas Gruenbacher | 6e849ce | 2011-03-14 17:27:45 +0100 | [diff] [blame] | 3760 | if (cmd >= ARRAY_SIZE(cmdnames)) |
Andreas Gruenbacher | f2ad906 | 2011-01-26 17:13:25 +0100 | [diff] [blame] | 3761 | return "Unknown"; |
| 3762 | return cmdnames[cmd]; |
| 3763 | } |
| 3764 | |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3765 | /** |
| 3766 | * drbd_wait_misc - wait for a request to make progress |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3767 | * @device: device associated with the request |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3768 | * @i: the struct drbd_interval embedded in struct drbd_request or |
| 3769 | * struct drbd_peer_request |
| 3770 | */ |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3771 | int drbd_wait_misc(struct drbd_device *device, struct drbd_interval *i) |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3772 | { |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 3773 | struct net_conf *nc; |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3774 | DEFINE_WAIT(wait); |
| 3775 | long timeout; |
| 3776 | |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 3777 | rcu_read_lock(); |
Andreas Gruenbacher | a6b32bc | 2011-05-31 14:33:49 +0200 | [diff] [blame] | 3778 | nc = rcu_dereference(first_peer_device(device)->connection->net_conf); |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 3779 | if (!nc) { |
| 3780 | rcu_read_unlock(); |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3781 | return -ETIMEDOUT; |
Philipp Reisner | 44ed167 | 2011-04-19 17:10:19 +0200 | [diff] [blame] | 3782 | } |
| 3783 | timeout = nc->ko_count ? nc->timeout * HZ / 10 * nc->ko_count : MAX_SCHEDULE_TIMEOUT; |
| 3784 | rcu_read_unlock(); |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3785 | |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3786 | /* Indicate to wake up device->misc_wait on progress. */ |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3787 | i->waiting = true; |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3788 | prepare_to_wait(&device->misc_wait, &wait, TASK_INTERRUPTIBLE); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 3789 | spin_unlock_irq(&device->resource->req_lock); |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3790 | timeout = schedule_timeout(timeout); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3791 | finish_wait(&device->misc_wait, &wait); |
Andreas Gruenbacher | 0500813 | 2011-07-07 14:19:42 +0200 | [diff] [blame] | 3792 | spin_lock_irq(&device->resource->req_lock); |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3793 | if (!timeout || device->state.conn < C_CONNECTED) |
Andreas Gruenbacher | 7be8da0 | 2011-02-22 02:15:32 +0100 | [diff] [blame] | 3794 | return -ETIMEDOUT; |
| 3795 | if (signal_pending(current)) |
| 3796 | return -ERESTARTSYS; |
| 3797 | return 0; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3798 | } |
| 3799 | |
| 3800 | #ifdef CONFIG_DRBD_FAULT_INJECTION |
| 3801 | /* Fault insertion support including random number generator shamelessly |
| 3802 | * stolen from kernel/rcutorture.c */ |
| 3803 | struct fault_random_state { |
| 3804 | unsigned long state; |
| 3805 | unsigned long count; |
| 3806 | }; |
| 3807 | |
| 3808 | #define FAULT_RANDOM_MULT 39916801 /* prime */ |
| 3809 | #define FAULT_RANDOM_ADD 479001701 /* prime */ |
| 3810 | #define FAULT_RANDOM_REFRESH 10000 |
| 3811 | |
| 3812 | /* |
| 3813 | * Crude but fast random-number generator. Uses a linear congruential |
| 3814 | * generator, with occasional help from get_random_bytes(). |
| 3815 | */ |
| 3816 | static unsigned long |
| 3817 | _drbd_fault_random(struct fault_random_state *rsp) |
| 3818 | { |
| 3819 | long refresh; |
| 3820 | |
Roel Kluin | 49829ea | 2009-12-15 22:55:44 +0100 | [diff] [blame] | 3821 | if (!rsp->count--) { |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3822 | get_random_bytes(&refresh, sizeof(refresh)); |
| 3823 | rsp->state += refresh; |
| 3824 | rsp->count = FAULT_RANDOM_REFRESH; |
| 3825 | } |
| 3826 | rsp->state = rsp->state * FAULT_RANDOM_MULT + FAULT_RANDOM_ADD; |
| 3827 | return swahw32(rsp->state); |
| 3828 | } |
| 3829 | |
| 3830 | static char * |
| 3831 | _drbd_fault_str(unsigned int type) { |
| 3832 | static char *_faults[] = { |
| 3833 | [DRBD_FAULT_MD_WR] = "Meta-data write", |
| 3834 | [DRBD_FAULT_MD_RD] = "Meta-data read", |
| 3835 | [DRBD_FAULT_RS_WR] = "Resync write", |
| 3836 | [DRBD_FAULT_RS_RD] = "Resync read", |
| 3837 | [DRBD_FAULT_DT_WR] = "Data write", |
| 3838 | [DRBD_FAULT_DT_RD] = "Data read", |
| 3839 | [DRBD_FAULT_DT_RA] = "Data read ahead", |
| 3840 | [DRBD_FAULT_BM_ALLOC] = "BM allocation", |
Philipp Reisner | 6b4388a | 2010-04-26 14:11:45 +0200 | [diff] [blame] | 3841 | [DRBD_FAULT_AL_EE] = "EE allocation", |
| 3842 | [DRBD_FAULT_RECEIVE] = "receive data corruption", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3843 | }; |
| 3844 | |
| 3845 | return (type < DRBD_FAULT_MAX) ? _faults[type] : "**Unknown**"; |
| 3846 | } |
| 3847 | |
| 3848 | unsigned int |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3849 | _drbd_insert_fault(struct drbd_device *device, unsigned int type) |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3850 | { |
| 3851 | static struct fault_random_state rrs = {0, 0}; |
| 3852 | |
| 3853 | unsigned int ret = ( |
| 3854 | (fault_devs == 0 || |
Andreas Gruenbacher | b30ab79 | 2011-07-03 13:26:43 +0200 | [diff] [blame] | 3855 | ((1 << device_to_minor(device)) & fault_devs) != 0) && |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3856 | (((_drbd_fault_random(&rrs) % 100) + 1) <= fault_rate)); |
| 3857 | |
| 3858 | if (ret) { |
| 3859 | fault_count++; |
| 3860 | |
Lars Ellenberg | 7383506 | 2010-05-27 11:51:56 +0200 | [diff] [blame] | 3861 | if (__ratelimit(&drbd_ratelimit_state)) |
Andreas Gruenbacher | d018017 | 2011-07-03 17:53:52 +0200 | [diff] [blame] | 3862 | drbd_warn(device, "***Simulating %s failure\n", |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3863 | _drbd_fault_str(type)); |
| 3864 | } |
| 3865 | |
| 3866 | return ret; |
| 3867 | } |
| 3868 | #endif |
| 3869 | |
| 3870 | const char *drbd_buildtag(void) |
| 3871 | { |
| 3872 | /* DRBD built from external sources has here a reference to the |
| 3873 | git hash of the source code. */ |
| 3874 | |
| 3875 | static char buildtag[38] = "\0uilt-in"; |
| 3876 | |
| 3877 | if (buildtag[0] == 0) { |
Cong Wang | bc4854b | 2012-04-03 14:13:36 +0800 | [diff] [blame] | 3878 | #ifdef MODULE |
| 3879 | sprintf(buildtag, "srcversion: %-24s", THIS_MODULE->srcversion); |
| 3880 | #else |
| 3881 | buildtag[0] = 'b'; |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3882 | #endif |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3883 | } |
| 3884 | |
| 3885 | return buildtag; |
| 3886 | } |
| 3887 | |
| 3888 | module_init(drbd_init) |
| 3889 | module_exit(drbd_cleanup) |
| 3890 | |
Philipp Reisner | b411b36 | 2009-09-25 16:07:19 -0700 | [diff] [blame] | 3891 | EXPORT_SYMBOL(drbd_conn_str); |
| 3892 | EXPORT_SYMBOL(drbd_role_str); |
| 3893 | EXPORT_SYMBOL(drbd_disk_str); |
| 3894 | EXPORT_SYMBOL(drbd_set_st_err_str); |