lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 1 | /* |
| 2 | * QEMU live block migration |
| 3 | * |
| 4 | * Copyright IBM, Corp. 2009 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Liran Schour <lirans@il.ibm.com> |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 10 | * the COPYING file in the top-level directory. |
| 11 | * |
Paolo Bonzini | 6b620ca | 2012-01-13 17:44:23 +0100 | [diff] [blame] | 12 | * Contributions after 2012-01-13 are licensed under the terms of the |
| 13 | * GNU GPL, version 2 or (at your option) any later version. |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 14 | */ |
| 15 | |
| 16 | #include "qemu-common.h" |
Markus Armbruster | bfb197e | 2014-10-07 13:59:11 +0200 | [diff] [blame] | 17 | #include "block/block.h" |
| 18 | #include "qemu/error-report.h" |
| 19 | #include "qemu/main-loop.h" |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 20 | #include "hw/hw.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 21 | #include "qemu/queue.h" |
| 22 | #include "qemu/timer.h" |
Paolo Bonzini | caf71f8 | 2012-12-17 18:19:50 +0100 | [diff] [blame] | 23 | #include "migration/block.h" |
| 24 | #include "migration/migration.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 25 | #include "sysemu/blockdev.h" |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 26 | #include <assert.h> |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 27 | |
Paolo Bonzini | 50717e9 | 2013-01-21 17:09:45 +0100 | [diff] [blame] | 28 | #define BLOCK_SIZE (1 << 20) |
| 29 | #define BDRV_SECTORS_PER_DIRTY_CHUNK (BLOCK_SIZE >> BDRV_SECTOR_BITS) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 30 | |
| 31 | #define BLK_MIG_FLAG_DEVICE_BLOCK 0x01 |
| 32 | #define BLK_MIG_FLAG_EOS 0x02 |
Jan Kiszka | 01e61e2 | 2009-12-01 15:20:17 +0100 | [diff] [blame] | 33 | #define BLK_MIG_FLAG_PROGRESS 0x04 |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 34 | #define BLK_MIG_FLAG_ZERO_BLOCK 0x08 |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 35 | |
| 36 | #define MAX_IS_ALLOCATED_SEARCH 65536 |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 37 | |
| 38 | //#define DEBUG_BLK_MIGRATION |
| 39 | |
| 40 | #ifdef DEBUG_BLK_MIGRATION |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 41 | #define DPRINTF(fmt, ...) \ |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 42 | do { printf("blk_migration: " fmt, ## __VA_ARGS__); } while (0) |
| 43 | #else |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 44 | #define DPRINTF(fmt, ...) \ |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 45 | do { } while (0) |
| 46 | #endif |
| 47 | |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 48 | typedef struct BlkMigDevState { |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 49 | /* Written during setup phase. Can be read without a lock. */ |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 50 | BlockDriverState *bs; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 51 | int shared_base; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 52 | int64_t total_sectors; |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 53 | QSIMPLEQ_ENTRY(BlkMigDevState) entry; |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 54 | |
| 55 | /* Only used by migration thread. Does not need a lock. */ |
| 56 | int bulk_completed; |
| 57 | int64_t cur_sector; |
| 58 | int64_t cur_dirty; |
| 59 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 60 | /* Protected by block migration lock. */ |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 61 | unsigned long *aio_bitmap; |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 62 | int64_t completed_sectors; |
Fam Zheng | e4654d2 | 2013-11-13 18:29:43 +0800 | [diff] [blame] | 63 | BdrvDirtyBitmap *dirty_bitmap; |
Fam Zheng | 3718d8a | 2014-05-23 21:29:43 +0800 | [diff] [blame] | 64 | Error *blocker; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 65 | } BlkMigDevState; |
| 66 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 67 | typedef struct BlkMigBlock { |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 68 | /* Only used by migration thread. */ |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 69 | uint8_t *buf; |
| 70 | BlkMigDevState *bmds; |
| 71 | int64_t sector; |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 72 | int nr_sectors; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 73 | struct iovec iov; |
| 74 | QEMUIOVector qiov; |
Markus Armbruster | 7c84b1b | 2014-10-07 13:59:14 +0200 | [diff] [blame] | 75 | BlockAIOCB *aiocb; |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 76 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 77 | /* Protected by block migration lock. */ |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 78 | int ret; |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 79 | QSIMPLEQ_ENTRY(BlkMigBlock) entry; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 80 | } BlkMigBlock; |
| 81 | |
| 82 | typedef struct BlkMigState { |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 83 | /* Written during setup phase. Can be read without a lock. */ |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 84 | int blk_enable; |
| 85 | int shared_base; |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 86 | QSIMPLEQ_HEAD(bmds_list, BlkMigDevState) bmds_list; |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 87 | int64_t total_sector_sum; |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 88 | bool zero_blocks; |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 89 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 90 | /* Protected by lock. */ |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 91 | QSIMPLEQ_HEAD(blk_list, BlkMigBlock) blk_list; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 92 | int submitted; |
| 93 | int read_done; |
Paolo Bonzini | 323920c | 2013-02-22 17:36:24 +0100 | [diff] [blame] | 94 | |
| 95 | /* Only used by migration thread. Does not need a lock. */ |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 96 | int transferred; |
Jan Kiszka | 01e61e2 | 2009-12-01 15:20:17 +0100 | [diff] [blame] | 97 | int prev_progress; |
Liran Schour | e970ec0 | 2010-01-26 10:31:45 +0200 | [diff] [blame] | 98 | int bulk_completed; |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 99 | |
| 100 | /* Lock must be taken _inside_ the iothread lock. */ |
| 101 | QemuMutex lock; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 102 | } BlkMigState; |
| 103 | |
Jan Kiszka | d11ecd3 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 104 | static BlkMigState block_mig_state; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 105 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 106 | static void blk_mig_lock(void) |
| 107 | { |
| 108 | qemu_mutex_lock(&block_mig_state.lock); |
| 109 | } |
| 110 | |
| 111 | static void blk_mig_unlock(void) |
| 112 | { |
| 113 | qemu_mutex_unlock(&block_mig_state.lock); |
| 114 | } |
| 115 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 116 | /* Must run outside of the iothread lock during the bulk phase, |
| 117 | * or the VM will stall. |
| 118 | */ |
| 119 | |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 120 | static void blk_send(QEMUFile *f, BlkMigBlock * blk) |
| 121 | { |
| 122 | int len; |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 123 | uint64_t flags = BLK_MIG_FLAG_DEVICE_BLOCK; |
| 124 | |
| 125 | if (block_mig_state.zero_blocks && |
| 126 | buffer_is_zero(blk->buf, BLOCK_SIZE)) { |
| 127 | flags |= BLK_MIG_FLAG_ZERO_BLOCK; |
| 128 | } |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 129 | |
| 130 | /* sector number and flags */ |
| 131 | qemu_put_be64(f, (blk->sector << BDRV_SECTOR_BITS) |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 132 | | flags); |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 133 | |
| 134 | /* device name */ |
Markus Armbruster | bfb197e | 2014-10-07 13:59:11 +0200 | [diff] [blame] | 135 | len = strlen(bdrv_get_device_name(blk->bmds->bs)); |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 136 | qemu_put_byte(f, len); |
Markus Armbruster | bfb197e | 2014-10-07 13:59:11 +0200 | [diff] [blame] | 137 | qemu_put_buffer(f, (uint8_t *)bdrv_get_device_name(blk->bmds->bs), len); |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 138 | |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 139 | /* if a block is zero we need to flush here since the network |
| 140 | * bandwidth is now a lot higher than the storage device bandwidth. |
| 141 | * thus if we queue zero blocks we slow down the migration */ |
| 142 | if (flags & BLK_MIG_FLAG_ZERO_BLOCK) { |
| 143 | qemu_fflush(f); |
| 144 | return; |
| 145 | } |
| 146 | |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 147 | qemu_put_buffer(f, blk->buf, BLOCK_SIZE); |
| 148 | } |
| 149 | |
Jan Kiszka | 25f2364 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 150 | int blk_mig_active(void) |
| 151 | { |
| 152 | return !QSIMPLEQ_EMPTY(&block_mig_state.bmds_list); |
| 153 | } |
| 154 | |
| 155 | uint64_t blk_mig_bytes_transferred(void) |
| 156 | { |
| 157 | BlkMigDevState *bmds; |
| 158 | uint64_t sum = 0; |
| 159 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 160 | blk_mig_lock(); |
Jan Kiszka | 25f2364 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 161 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
| 162 | sum += bmds->completed_sectors; |
| 163 | } |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 164 | blk_mig_unlock(); |
Jan Kiszka | 25f2364 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 165 | return sum << BDRV_SECTOR_BITS; |
| 166 | } |
| 167 | |
| 168 | uint64_t blk_mig_bytes_remaining(void) |
| 169 | { |
| 170 | return blk_mig_bytes_total() - blk_mig_bytes_transferred(); |
| 171 | } |
| 172 | |
| 173 | uint64_t blk_mig_bytes_total(void) |
| 174 | { |
| 175 | BlkMigDevState *bmds; |
| 176 | uint64_t sum = 0; |
| 177 | |
| 178 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
| 179 | sum += bmds->total_sectors; |
| 180 | } |
| 181 | return sum << BDRV_SECTOR_BITS; |
| 182 | } |
| 183 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 184 | |
| 185 | /* Called with migration lock held. */ |
| 186 | |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 187 | static int bmds_aio_inflight(BlkMigDevState *bmds, int64_t sector) |
| 188 | { |
| 189 | int64_t chunk = sector / (int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK; |
| 190 | |
Markus Armbruster | 57322b7 | 2014-06-26 13:23:22 +0200 | [diff] [blame] | 191 | if (sector < bdrv_nb_sectors(bmds->bs)) { |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 192 | return !!(bmds->aio_bitmap[chunk / (sizeof(unsigned long) * 8)] & |
| 193 | (1UL << (chunk % (sizeof(unsigned long) * 8)))); |
| 194 | } else { |
| 195 | return 0; |
| 196 | } |
| 197 | } |
| 198 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 199 | /* Called with migration lock held. */ |
| 200 | |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 201 | static void bmds_set_aio_inflight(BlkMigDevState *bmds, int64_t sector_num, |
| 202 | int nb_sectors, int set) |
| 203 | { |
| 204 | int64_t start, end; |
| 205 | unsigned long val, idx, bit; |
| 206 | |
| 207 | start = sector_num / BDRV_SECTORS_PER_DIRTY_CHUNK; |
| 208 | end = (sector_num + nb_sectors - 1) / BDRV_SECTORS_PER_DIRTY_CHUNK; |
| 209 | |
| 210 | for (; start <= end; start++) { |
| 211 | idx = start / (sizeof(unsigned long) * 8); |
| 212 | bit = start % (sizeof(unsigned long) * 8); |
| 213 | val = bmds->aio_bitmap[idx]; |
| 214 | if (set) { |
Marcelo Tosatti | 62155e2 | 2010-11-12 16:07:50 -0200 | [diff] [blame] | 215 | val |= 1UL << bit; |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 216 | } else { |
Marcelo Tosatti | 62155e2 | 2010-11-12 16:07:50 -0200 | [diff] [blame] | 217 | val &= ~(1UL << bit); |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 218 | } |
| 219 | bmds->aio_bitmap[idx] = val; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | static void alloc_aio_bitmap(BlkMigDevState *bmds) |
| 224 | { |
| 225 | BlockDriverState *bs = bmds->bs; |
| 226 | int64_t bitmap_size; |
| 227 | |
Markus Armbruster | 57322b7 | 2014-06-26 13:23:22 +0200 | [diff] [blame] | 228 | bitmap_size = bdrv_nb_sectors(bs) + BDRV_SECTORS_PER_DIRTY_CHUNK * 8 - 1; |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 229 | bitmap_size /= BDRV_SECTORS_PER_DIRTY_CHUNK * 8; |
| 230 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 231 | bmds->aio_bitmap = g_malloc0(bitmap_size); |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 232 | } |
| 233 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 234 | /* Never hold migration lock when yielding to the main loop! */ |
| 235 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 236 | static void blk_mig_read_cb(void *opaque, int ret) |
| 237 | { |
| 238 | BlkMigBlock *blk = opaque; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 239 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 240 | blk_mig_lock(); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 241 | blk->ret = ret; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 242 | |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 243 | QSIMPLEQ_INSERT_TAIL(&block_mig_state.blk_list, blk, entry); |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 244 | bmds_set_aio_inflight(blk->bmds, blk->sector, blk->nr_sectors, 0); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 245 | |
Jan Kiszka | d11ecd3 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 246 | block_mig_state.submitted--; |
| 247 | block_mig_state.read_done++; |
| 248 | assert(block_mig_state.submitted >= 0); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 249 | blk_mig_unlock(); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 250 | } |
| 251 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 252 | /* Called with no lock taken. */ |
| 253 | |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 254 | static int mig_save_device_bulk(QEMUFile *f, BlkMigDevState *bmds) |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 255 | { |
Jan Kiszka | 57cce12 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 256 | int64_t total_sectors = bmds->total_sectors; |
| 257 | int64_t cur_sector = bmds->cur_sector; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 258 | BlockDriverState *bs = bmds->bs; |
Jan Kiszka | 57cce12 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 259 | BlkMigBlock *blk; |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 260 | int nr_sectors; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 261 | |
| 262 | if (bmds->shared_base) { |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 263 | qemu_mutex_lock_iothread(); |
Jan Kiszka | b1d1085 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 264 | while (cur_sector < total_sectors && |
Jan Kiszka | 57cce12 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 265 | !bdrv_is_allocated(bs, cur_sector, MAX_IS_ALLOCATED_SEARCH, |
| 266 | &nr_sectors)) { |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 267 | cur_sector += nr_sectors; |
| 268 | } |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 269 | qemu_mutex_unlock_iothread(); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 270 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 271 | |
| 272 | if (cur_sector >= total_sectors) { |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 273 | bmds->cur_sector = bmds->completed_sectors = total_sectors; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 274 | return 1; |
| 275 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 276 | |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 277 | bmds->completed_sectors = cur_sector; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 278 | |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 279 | cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 280 | |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 281 | /* we are going to transfer a full block even if it is not allocated */ |
| 282 | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 283 | |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 284 | if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { |
Jan Kiszka | 57cce12 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 285 | nr_sectors = total_sectors - cur_sector; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 286 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 287 | |
Markus Armbruster | 5839e53 | 2014-08-19 10:31:08 +0200 | [diff] [blame] | 288 | blk = g_new(BlkMigBlock, 1); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 289 | blk->buf = g_malloc(BLOCK_SIZE); |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 290 | blk->bmds = bmds; |
| 291 | blk->sector = cur_sector; |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 292 | blk->nr_sectors = nr_sectors; |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 293 | |
Liran Schour | e970ec0 | 2010-01-26 10:31:45 +0200 | [diff] [blame] | 294 | blk->iov.iov_base = blk->buf; |
| 295 | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; |
| 296 | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1); |
Jan Kiszka | 57cce12 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 297 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 298 | blk_mig_lock(); |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 299 | block_mig_state.submitted++; |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 300 | blk_mig_unlock(); |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 301 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 302 | qemu_mutex_lock_iothread(); |
Liran Schour | e970ec0 | 2010-01-26 10:31:45 +0200 | [diff] [blame] | 303 | blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov, |
| 304 | nr_sectors, blk_mig_read_cb, blk); |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 305 | |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 306 | bdrv_reset_dirty(bs, cur_sector, nr_sectors); |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 307 | qemu_mutex_unlock_iothread(); |
Jan Kiszka | 13f0b67 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 308 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 309 | bmds->cur_sector = cur_sector + nr_sectors; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 310 | return (bmds->cur_sector >= total_sectors); |
| 311 | } |
| 312 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 313 | /* Called with iothread lock taken. */ |
| 314 | |
Fam Zheng | b8afb52 | 2014-04-16 09:34:30 +0800 | [diff] [blame] | 315 | static int set_dirty_tracking(void) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 316 | { |
| 317 | BlkMigDevState *bmds; |
Fam Zheng | b8afb52 | 2014-04-16 09:34:30 +0800 | [diff] [blame] | 318 | int ret; |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 319 | |
| 320 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
Fam Zheng | b8afb52 | 2014-04-16 09:34:30 +0800 | [diff] [blame] | 321 | bmds->dirty_bitmap = bdrv_create_dirty_bitmap(bmds->bs, BLOCK_SIZE, |
| 322 | NULL); |
| 323 | if (!bmds->dirty_bitmap) { |
| 324 | ret = -errno; |
| 325 | goto fail; |
| 326 | } |
Fam Zheng | e4654d2 | 2013-11-13 18:29:43 +0800 | [diff] [blame] | 327 | } |
Fam Zheng | b8afb52 | 2014-04-16 09:34:30 +0800 | [diff] [blame] | 328 | return 0; |
| 329 | |
| 330 | fail: |
| 331 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
| 332 | if (bmds->dirty_bitmap) { |
| 333 | bdrv_release_dirty_bitmap(bmds->bs, bmds->dirty_bitmap); |
| 334 | } |
| 335 | } |
| 336 | return ret; |
Fam Zheng | e4654d2 | 2013-11-13 18:29:43 +0800 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | static void unset_dirty_tracking(void) |
| 340 | { |
| 341 | BlkMigDevState *bmds; |
| 342 | |
| 343 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
| 344 | bdrv_release_dirty_bitmap(bmds->bs, bmds->dirty_bitmap); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 345 | } |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 346 | } |
| 347 | |
Markus Armbruster | fea68bb | 2014-10-07 13:59:10 +0200 | [diff] [blame] | 348 | static void init_blk_migration(QEMUFile *f) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 349 | { |
Markus Armbruster | fea68bb | 2014-10-07 13:59:10 +0200 | [diff] [blame] | 350 | BlockDriverState *bs; |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 351 | BlkMigDevState *bmds; |
Jan Kiszka | 792773b | 2009-11-30 20:34:55 +0100 | [diff] [blame] | 352 | int64_t sectors; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 353 | |
Markus Armbruster | fea68bb | 2014-10-07 13:59:10 +0200 | [diff] [blame] | 354 | block_mig_state.submitted = 0; |
| 355 | block_mig_state.read_done = 0; |
| 356 | block_mig_state.transferred = 0; |
| 357 | block_mig_state.total_sector_sum = 0; |
| 358 | block_mig_state.prev_progress = -1; |
| 359 | block_mig_state.bulk_completed = 0; |
| 360 | block_mig_state.zero_blocks = migrate_zero_blocks(); |
| 361 | |
| 362 | for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) { |
| 363 | if (bdrv_is_read_only(bs)) { |
| 364 | continue; |
| 365 | } |
| 366 | |
Markus Armbruster | 57322b7 | 2014-06-26 13:23:22 +0200 | [diff] [blame] | 367 | sectors = bdrv_nb_sectors(bs); |
Shahar Havivi | 31f54f2 | 2010-07-10 18:59:06 +0300 | [diff] [blame] | 368 | if (sectors <= 0) { |
Stefan Hajnoczi | b66460e | 2010-04-09 15:22:13 +0100 | [diff] [blame] | 369 | return; |
| 370 | } |
| 371 | |
Markus Armbruster | 5839e53 | 2014-08-19 10:31:08 +0200 | [diff] [blame] | 372 | bmds = g_new0(BlkMigDevState, 1); |
Stefan Hajnoczi | b66460e | 2010-04-09 15:22:13 +0100 | [diff] [blame] | 373 | bmds->bs = bs; |
| 374 | bmds->bulk_completed = 0; |
| 375 | bmds->total_sectors = sectors; |
| 376 | bmds->completed_sectors = 0; |
| 377 | bmds->shared_base = block_mig_state.shared_base; |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 378 | alloc_aio_bitmap(bmds); |
Fam Zheng | 3718d8a | 2014-05-23 21:29:43 +0800 | [diff] [blame] | 379 | error_setg(&bmds->blocker, "block device is in use by migration"); |
| 380 | bdrv_op_block_all(bs, bmds->blocker); |
Fam Zheng | 8442cfd | 2013-08-23 09:14:48 +0800 | [diff] [blame] | 381 | bdrv_ref(bs); |
Stefan Hajnoczi | b66460e | 2010-04-09 15:22:13 +0100 | [diff] [blame] | 382 | |
| 383 | block_mig_state.total_sector_sum += sectors; |
| 384 | |
| 385 | if (bmds->shared_base) { |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 386 | DPRINTF("Start migration for %s with shared base image\n", |
Markus Armbruster | bfb197e | 2014-10-07 13:59:11 +0200 | [diff] [blame] | 387 | bdrv_get_device_name(bs)); |
Stefan Hajnoczi | b66460e | 2010-04-09 15:22:13 +0100 | [diff] [blame] | 388 | } else { |
Markus Armbruster | bfb197e | 2014-10-07 13:59:11 +0200 | [diff] [blame] | 389 | DPRINTF("Start full migration for %s\n", bdrv_get_device_name(bs)); |
Stefan Hajnoczi | b66460e | 2010-04-09 15:22:13 +0100 | [diff] [blame] | 390 | } |
| 391 | |
| 392 | QSIMPLEQ_INSERT_TAIL(&block_mig_state.bmds_list, bmds, entry); |
| 393 | } |
| 394 | } |
| 395 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 396 | /* Called with no lock taken. */ |
| 397 | |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 398 | static int blk_mig_save_bulked_block(QEMUFile *f) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 399 | { |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 400 | int64_t completed_sector_sum = 0; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 401 | BlkMigDevState *bmds; |
Jan Kiszka | 01e61e2 | 2009-12-01 15:20:17 +0100 | [diff] [blame] | 402 | int progress; |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 403 | int ret = 0; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 404 | |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 405 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 406 | if (bmds->bulk_completed == 0) { |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 407 | if (mig_save_device_bulk(f, bmds) == 1) { |
Jan Kiszka | 57cce12 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 408 | /* completed bulk section for this device */ |
| 409 | bmds->bulk_completed = 1; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 410 | } |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 411 | completed_sector_sum += bmds->completed_sectors; |
| 412 | ret = 1; |
| 413 | break; |
| 414 | } else { |
| 415 | completed_sector_sum += bmds->completed_sectors; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 416 | } |
| 417 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 418 | |
Pierre Riteau | 8b6b2af | 2011-01-12 14:41:00 +0100 | [diff] [blame] | 419 | if (block_mig_state.total_sector_sum != 0) { |
| 420 | progress = completed_sector_sum * 100 / |
| 421 | block_mig_state.total_sector_sum; |
| 422 | } else { |
| 423 | progress = 100; |
| 424 | } |
Jan Kiszka | 01e61e2 | 2009-12-01 15:20:17 +0100 | [diff] [blame] | 425 | if (progress != block_mig_state.prev_progress) { |
| 426 | block_mig_state.prev_progress = progress; |
| 427 | qemu_put_be64(f, (progress << BDRV_SECTOR_BITS) |
| 428 | | BLK_MIG_FLAG_PROGRESS); |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 429 | DPRINTF("Completed %d %%\r", progress); |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | return ret; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 433 | } |
| 434 | |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 435 | static void blk_mig_reset_dirty_cursor(void) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 436 | { |
| 437 | BlkMigDevState *bmds; |
Jan Kiszka | 575a58d | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 438 | |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 439 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 440 | bmds->cur_dirty = 0; |
| 441 | } |
| 442 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 443 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 444 | /* Called with iothread lock taken. */ |
| 445 | |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 446 | static int mig_save_device_dirty(QEMUFile *f, BlkMigDevState *bmds, |
| 447 | int is_async) |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 448 | { |
| 449 | BlkMigBlock *blk; |
| 450 | int64_t total_sectors = bmds->total_sectors; |
| 451 | int64_t sector; |
| 452 | int nr_sectors; |
Juan Quintela | dcd1d22 | 2011-09-21 23:01:54 +0200 | [diff] [blame] | 453 | int ret = -EIO; |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 454 | |
| 455 | for (sector = bmds->cur_dirty; sector < bmds->total_sectors;) { |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 456 | blk_mig_lock(); |
Marcelo Tosatti | 62155e2 | 2010-11-12 16:07:50 -0200 | [diff] [blame] | 457 | if (bmds_aio_inflight(bmds, sector)) { |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 458 | blk_mig_unlock(); |
Stefan Hajnoczi | 922453b | 2011-11-30 12:23:43 +0000 | [diff] [blame] | 459 | bdrv_drain_all(); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 460 | } else { |
| 461 | blk_mig_unlock(); |
Marcelo Tosatti | 62155e2 | 2010-11-12 16:07:50 -0200 | [diff] [blame] | 462 | } |
Fam Zheng | e4654d2 | 2013-11-13 18:29:43 +0800 | [diff] [blame] | 463 | if (bdrv_get_dirty(bmds->bs, bmds->dirty_bitmap, sector)) { |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 464 | |
| 465 | if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) { |
| 466 | nr_sectors = total_sectors - sector; |
| 467 | } else { |
| 468 | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 469 | } |
Markus Armbruster | 5839e53 | 2014-08-19 10:31:08 +0200 | [diff] [blame] | 470 | blk = g_new(BlkMigBlock, 1); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 471 | blk->buf = g_malloc(BLOCK_SIZE); |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 472 | blk->bmds = bmds; |
| 473 | blk->sector = sector; |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 474 | blk->nr_sectors = nr_sectors; |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 475 | |
Liran Schour | 889ae39 | 2010-01-26 10:31:49 +0200 | [diff] [blame] | 476 | if (is_async) { |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 477 | blk->iov.iov_base = blk->buf; |
| 478 | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; |
| 479 | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1); |
| 480 | |
| 481 | blk->aiocb = bdrv_aio_readv(bmds->bs, sector, &blk->qiov, |
| 482 | nr_sectors, blk_mig_read_cb, blk); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 483 | |
| 484 | blk_mig_lock(); |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 485 | block_mig_state.submitted++; |
Marcelo Tosatti | 33656af | 2010-11-08 17:02:56 -0200 | [diff] [blame] | 486 | bmds_set_aio_inflight(bmds, sector, nr_sectors, 1); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 487 | blk_mig_unlock(); |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 488 | } else { |
Juan Quintela | dcd1d22 | 2011-09-21 23:01:54 +0200 | [diff] [blame] | 489 | ret = bdrv_read(bmds->bs, sector, blk->buf, nr_sectors); |
| 490 | if (ret < 0) { |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 491 | goto error; |
| 492 | } |
| 493 | blk_send(f, blk); |
| 494 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 495 | g_free(blk->buf); |
| 496 | g_free(blk); |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | bdrv_reset_dirty(bmds->bs, sector, nr_sectors); |
| 500 | break; |
| 501 | } |
| 502 | sector += BDRV_SECTORS_PER_DIRTY_CHUNK; |
| 503 | bmds->cur_dirty = sector; |
| 504 | } |
| 505 | |
| 506 | return (bmds->cur_dirty >= bmds->total_sectors); |
| 507 | |
Liran Schour | 889ae39 | 2010-01-26 10:31:49 +0200 | [diff] [blame] | 508 | error: |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 509 | DPRINTF("Error reading sector %" PRId64 "\n", sector); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 510 | g_free(blk->buf); |
| 511 | g_free(blk); |
Juan Quintela | 43be3a2 | 2012-08-29 21:59:22 +0200 | [diff] [blame] | 512 | return ret; |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 513 | } |
| 514 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 515 | /* Called with iothread lock taken. |
| 516 | * |
| 517 | * return value: |
Juan Quintela | ceb2bd0 | 2012-08-29 21:37:14 +0200 | [diff] [blame] | 518 | * 0: too much data for max_downtime |
| 519 | * 1: few enough data for max_downtime |
| 520 | */ |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 521 | static int blk_mig_save_dirty_block(QEMUFile *f, int is_async) |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 522 | { |
| 523 | BlkMigDevState *bmds; |
Juan Quintela | ceb2bd0 | 2012-08-29 21:37:14 +0200 | [diff] [blame] | 524 | int ret = 1; |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 525 | |
| 526 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
Juan Quintela | ceb2bd0 | 2012-08-29 21:37:14 +0200 | [diff] [blame] | 527 | ret = mig_save_device_dirty(f, bmds, is_async); |
Juan Quintela | 43be3a2 | 2012-08-29 21:59:22 +0200 | [diff] [blame] | 528 | if (ret <= 0) { |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 529 | break; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 530 | } |
| 531 | } |
Jan Kiszka | 575a58d | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 532 | |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 533 | return ret; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 534 | } |
| 535 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 536 | /* Called with no locks taken. */ |
| 537 | |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 538 | static int flush_blks(QEMUFile *f) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 539 | { |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 540 | BlkMigBlock *blk; |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 541 | int ret = 0; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 542 | |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 543 | DPRINTF("%s Enter submitted %d read_done %d transferred %d\n", |
Jan Kiszka | d11ecd3 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 544 | __FUNCTION__, block_mig_state.submitted, block_mig_state.read_done, |
| 545 | block_mig_state.transferred); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 546 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 547 | blk_mig_lock(); |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 548 | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
| 549 | if (qemu_file_rate_limit(f)) { |
| 550 | break; |
| 551 | } |
Jan Kiszka | 4b64036 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 552 | if (blk->ret < 0) { |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 553 | ret = blk->ret; |
Jan Kiszka | 4b64036 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 554 | break; |
| 555 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 556 | |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 557 | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 558 | blk_mig_unlock(); |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 559 | blk_send(f, blk); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 560 | blk_mig_lock(); |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 561 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 562 | g_free(blk->buf); |
| 563 | g_free(blk); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 564 | |
Jan Kiszka | d11ecd3 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 565 | block_mig_state.read_done--; |
| 566 | block_mig_state.transferred++; |
| 567 | assert(block_mig_state.read_done >= 0); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 568 | } |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 569 | blk_mig_unlock(); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 570 | |
malc | d0f2c4c | 2010-02-07 02:03:50 +0300 | [diff] [blame] | 571 | DPRINTF("%s Exit submitted %d read_done %d transferred %d\n", __FUNCTION__, |
Jan Kiszka | d11ecd3 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 572 | block_mig_state.submitted, block_mig_state.read_done, |
| 573 | block_mig_state.transferred); |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 574 | return ret; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 575 | } |
| 576 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 577 | /* Called with iothread lock taken. */ |
| 578 | |
Liran Schour | 889ae39 | 2010-01-26 10:31:49 +0200 | [diff] [blame] | 579 | static int64_t get_remaining_dirty(void) |
| 580 | { |
| 581 | BlkMigDevState *bmds; |
| 582 | int64_t dirty = 0; |
| 583 | |
| 584 | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
Fam Zheng | e4654d2 | 2013-11-13 18:29:43 +0800 | [diff] [blame] | 585 | dirty += bdrv_get_dirty_count(bmds->bs, bmds->dirty_bitmap); |
Liran Schour | 889ae39 | 2010-01-26 10:31:49 +0200 | [diff] [blame] | 586 | } |
| 587 | |
Paolo Bonzini | acc906c | 2013-01-21 17:09:44 +0100 | [diff] [blame] | 588 | return dirty << BDRV_SECTOR_BITS; |
Liran Schour | 889ae39 | 2010-01-26 10:31:49 +0200 | [diff] [blame] | 589 | } |
| 590 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 591 | /* Called with iothread lock taken. */ |
| 592 | |
Luiz Capitulino | 539de12 | 2011-12-05 14:06:56 -0200 | [diff] [blame] | 593 | static void blk_mig_cleanup(void) |
Jan Kiszka | 4ec7fcc | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 594 | { |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 595 | BlkMigDevState *bmds; |
| 596 | BlkMigBlock *blk; |
Jan Kiszka | 4ec7fcc | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 597 | |
Kevin Wolf | 946d58b | 2012-09-25 15:47:36 +0200 | [diff] [blame] | 598 | bdrv_drain_all(); |
| 599 | |
Fam Zheng | e4654d2 | 2013-11-13 18:29:43 +0800 | [diff] [blame] | 600 | unset_dirty_tracking(); |
Marcelo Tosatti | 8f794c5 | 2011-01-26 12:12:31 -0200 | [diff] [blame] | 601 | |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 602 | blk_mig_lock(); |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 603 | while ((bmds = QSIMPLEQ_FIRST(&block_mig_state.bmds_list)) != NULL) { |
| 604 | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.bmds_list, entry); |
Fam Zheng | 3718d8a | 2014-05-23 21:29:43 +0800 | [diff] [blame] | 605 | bdrv_op_unblock_all(bmds->bs, bmds->blocker); |
| 606 | error_free(bmds->blocker); |
Fam Zheng | 8442cfd | 2013-08-23 09:14:48 +0800 | [diff] [blame] | 607 | bdrv_unref(bmds->bs); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 608 | g_free(bmds->aio_bitmap); |
| 609 | g_free(bmds); |
Jan Kiszka | 4ec7fcc | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 610 | } |
| 611 | |
Jan Kiszka | 82801d8 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 612 | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
| 613 | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 614 | g_free(blk->buf); |
| 615 | g_free(blk); |
Jan Kiszka | 4ec7fcc | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 616 | } |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 617 | blk_mig_unlock(); |
Jan Kiszka | 4ec7fcc | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 618 | } |
| 619 | |
Juan Quintela | 9b5bfab | 2012-06-26 19:26:41 +0200 | [diff] [blame] | 620 | static void block_migration_cancel(void *opaque) |
| 621 | { |
| 622 | blk_mig_cleanup(); |
| 623 | } |
| 624 | |
Juan Quintela | d1315aa | 2012-06-28 15:11:57 +0200 | [diff] [blame] | 625 | static int block_save_setup(QEMUFile *f, void *opaque) |
| 626 | { |
| 627 | int ret; |
| 628 | |
| 629 | DPRINTF("Enter save live setup submitted %d transferred %d\n", |
| 630 | block_mig_state.submitted, block_mig_state.transferred); |
| 631 | |
Paolo Bonzini | 9b09503 | 2013-02-22 17:36:28 +0100 | [diff] [blame] | 632 | qemu_mutex_lock_iothread(); |
chai wen | 1ac362c | 2014-06-04 11:47:37 +0800 | [diff] [blame] | 633 | init_blk_migration(f); |
Juan Quintela | d1315aa | 2012-06-28 15:11:57 +0200 | [diff] [blame] | 634 | |
| 635 | /* start track dirty blocks */ |
Fam Zheng | b8afb52 | 2014-04-16 09:34:30 +0800 | [diff] [blame] | 636 | ret = set_dirty_tracking(); |
| 637 | |
| 638 | if (ret) { |
| 639 | qemu_mutex_unlock_iothread(); |
| 640 | return ret; |
| 641 | } |
| 642 | |
Paolo Bonzini | 9b09503 | 2013-02-22 17:36:28 +0100 | [diff] [blame] | 643 | qemu_mutex_unlock_iothread(); |
Juan Quintela | d1315aa | 2012-06-28 15:11:57 +0200 | [diff] [blame] | 644 | |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 645 | ret = flush_blks(f); |
Juan Quintela | d1315aa | 2012-06-28 15:11:57 +0200 | [diff] [blame] | 646 | blk_mig_reset_dirty_cursor(); |
Juan Quintela | d1315aa | 2012-06-28 15:11:57 +0200 | [diff] [blame] | 647 | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
| 648 | |
Paolo Bonzini | d418cf5 | 2013-02-22 17:36:11 +0100 | [diff] [blame] | 649 | return ret; |
Juan Quintela | d1315aa | 2012-06-28 15:11:57 +0200 | [diff] [blame] | 650 | } |
| 651 | |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 652 | static int block_save_iterate(QEMUFile *f, void *opaque) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 653 | { |
Juan Quintela | 2975725 | 2011-10-19 15:22:18 +0200 | [diff] [blame] | 654 | int ret; |
Stefan Hajnoczi | 6aaa9da | 2013-02-12 10:37:15 +0100 | [diff] [blame] | 655 | int64_t last_ftell = qemu_ftell(f); |
Juan Quintela | 2975725 | 2011-10-19 15:22:18 +0200 | [diff] [blame] | 656 | |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 657 | DPRINTF("Enter save live iterate submitted %d transferred %d\n", |
| 658 | block_mig_state.submitted, block_mig_state.transferred); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 659 | |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 660 | ret = flush_blks(f); |
Juan Quintela | 2975725 | 2011-10-19 15:22:18 +0200 | [diff] [blame] | 661 | if (ret) { |
Juan Quintela | 2975725 | 2011-10-19 15:22:18 +0200 | [diff] [blame] | 662 | return ret; |
Jan Kiszka | 4b64036 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 663 | } |
| 664 | |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 665 | blk_mig_reset_dirty_cursor(); |
| 666 | |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 667 | /* control the rate of transfer */ |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 668 | blk_mig_lock(); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 669 | while ((block_mig_state.submitted + |
| 670 | block_mig_state.read_done) * BLOCK_SIZE < |
| 671 | qemu_file_get_rate_limit(f)) { |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 672 | blk_mig_unlock(); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 673 | if (block_mig_state.bulk_completed == 0) { |
| 674 | /* first finish the bulk phase */ |
| 675 | if (blk_mig_save_bulked_block(f) == 0) { |
| 676 | /* finished saving bulk on all devices */ |
| 677 | block_mig_state.bulk_completed = 1; |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 678 | } |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 679 | ret = 0; |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 680 | } else { |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 681 | /* Always called with iothread lock taken for |
| 682 | * simplicity, block_save_complete also calls it. |
| 683 | */ |
| 684 | qemu_mutex_lock_iothread(); |
Juan Quintela | 43be3a2 | 2012-08-29 21:59:22 +0200 | [diff] [blame] | 685 | ret = blk_mig_save_dirty_block(f, 1); |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 686 | qemu_mutex_unlock_iothread(); |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 687 | } |
| 688 | if (ret < 0) { |
| 689 | return ret; |
| 690 | } |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 691 | blk_mig_lock(); |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 692 | if (ret != 0) { |
| 693 | /* no more dirty blocks */ |
| 694 | break; |
Liran Schour | d76cac7 | 2010-01-26 14:04:11 +0200 | [diff] [blame] | 695 | } |
Jan Kiszka | 4b64036 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 696 | } |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 697 | blk_mig_unlock(); |
Jan Kiszka | 4b64036 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 698 | |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 699 | ret = flush_blks(f); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 700 | if (ret) { |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 701 | return ret; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 702 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 703 | |
| 704 | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
Stefan Hajnoczi | 6aaa9da | 2013-02-12 10:37:15 +0100 | [diff] [blame] | 705 | return qemu_ftell(f) - last_ftell; |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 706 | } |
| 707 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 708 | /* Called with iothread lock taken. */ |
| 709 | |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 710 | static int block_save_complete(QEMUFile *f, void *opaque) |
| 711 | { |
| 712 | int ret; |
| 713 | |
| 714 | DPRINTF("Enter save live complete submitted %d transferred %d\n", |
| 715 | block_mig_state.submitted, block_mig_state.transferred); |
| 716 | |
Juan Quintela | 59feec4 | 2012-08-29 20:17:13 +0200 | [diff] [blame] | 717 | ret = flush_blks(f); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 718 | if (ret) { |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 719 | return ret; |
| 720 | } |
| 721 | |
| 722 | blk_mig_reset_dirty_cursor(); |
| 723 | |
| 724 | /* we know for sure that save bulk is completed and |
| 725 | all async read completed */ |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 726 | blk_mig_lock(); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 727 | assert(block_mig_state.submitted == 0); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 728 | blk_mig_unlock(); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 729 | |
Juan Quintela | 43be3a2 | 2012-08-29 21:59:22 +0200 | [diff] [blame] | 730 | do { |
| 731 | ret = blk_mig_save_dirty_block(f, 0); |
Paolo Bonzini | d418cf5 | 2013-02-22 17:36:11 +0100 | [diff] [blame] | 732 | if (ret < 0) { |
| 733 | return ret; |
| 734 | } |
Juan Quintela | 43be3a2 | 2012-08-29 21:59:22 +0200 | [diff] [blame] | 735 | } while (ret == 0); |
| 736 | |
Juan Quintela | 43be3a2 | 2012-08-29 21:59:22 +0200 | [diff] [blame] | 737 | /* report completion */ |
| 738 | qemu_put_be64(f, (100 << BDRV_SECTOR_BITS) | BLK_MIG_FLAG_PROGRESS); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 739 | |
| 740 | DPRINTF("Block migration completed\n"); |
| 741 | |
| 742 | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
| 743 | |
Paolo Bonzini | d418cf5 | 2013-02-22 17:36:11 +0100 | [diff] [blame] | 744 | blk_mig_cleanup(); |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 745 | return 0; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 746 | } |
| 747 | |
Juan Quintela | e4ed154 | 2012-09-21 11:18:18 +0200 | [diff] [blame] | 748 | static uint64_t block_save_pending(QEMUFile *f, void *opaque, uint64_t max_size) |
| 749 | { |
Stefan Hajnoczi | 6aaa9da | 2013-02-12 10:37:15 +0100 | [diff] [blame] | 750 | /* Estimate pending number of bytes to send */ |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 751 | uint64_t pending; |
| 752 | |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 753 | qemu_mutex_lock_iothread(); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 754 | blk_mig_lock(); |
Paolo Bonzini | 13197e3 | 2013-02-22 17:36:23 +0100 | [diff] [blame] | 755 | pending = get_remaining_dirty() + |
Stefan Hajnoczi | 6aaa9da | 2013-02-12 10:37:15 +0100 | [diff] [blame] | 756 | block_mig_state.submitted * BLOCK_SIZE + |
| 757 | block_mig_state.read_done * BLOCK_SIZE; |
Juan Quintela | e4ed154 | 2012-09-21 11:18:18 +0200 | [diff] [blame] | 758 | |
Stefan Hajnoczi | 6aaa9da | 2013-02-12 10:37:15 +0100 | [diff] [blame] | 759 | /* Report at least one block pending during bulk phase */ |
| 760 | if (pending == 0 && !block_mig_state.bulk_completed) { |
| 761 | pending = BLOCK_SIZE; |
| 762 | } |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 763 | blk_mig_unlock(); |
Paolo Bonzini | 32c835b | 2013-02-22 17:36:27 +0100 | [diff] [blame] | 764 | qemu_mutex_unlock_iothread(); |
Juan Quintela | e4ed154 | 2012-09-21 11:18:18 +0200 | [diff] [blame] | 765 | |
Stefan Hajnoczi | 6aaa9da | 2013-02-12 10:37:15 +0100 | [diff] [blame] | 766 | DPRINTF("Enter save live pending %" PRIu64 "\n", pending); |
| 767 | return pending; |
Juan Quintela | e4ed154 | 2012-09-21 11:18:18 +0200 | [diff] [blame] | 768 | } |
| 769 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 770 | static int block_load(QEMUFile *f, void *opaque, int version_id) |
| 771 | { |
Jan Kiszka | 01e61e2 | 2009-12-01 15:20:17 +0100 | [diff] [blame] | 772 | static int banner_printed; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 773 | int len, flags; |
| 774 | char device_name[256]; |
| 775 | int64_t addr; |
Pierre Riteau | 77358b5 | 2011-01-21 12:42:30 +0100 | [diff] [blame] | 776 | BlockDriverState *bs, *bs_prev = NULL; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 777 | uint8_t *buf; |
Pierre Riteau | 77358b5 | 2011-01-21 12:42:30 +0100 | [diff] [blame] | 778 | int64_t total_sectors = 0; |
| 779 | int nr_sectors; |
Juan Quintela | 42802d4 | 2011-10-05 01:14:46 +0200 | [diff] [blame] | 780 | int ret; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 781 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 782 | do { |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 783 | addr = qemu_get_be64(f); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 784 | |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 785 | flags = addr & ~BDRV_SECTOR_MASK; |
| 786 | addr >>= BDRV_SECTOR_BITS; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 787 | |
| 788 | if (flags & BLK_MIG_FLAG_DEVICE_BLOCK) { |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 789 | /* get device name */ |
| 790 | len = qemu_get_byte(f); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 791 | qemu_get_buffer(f, (uint8_t *)device_name, len); |
| 792 | device_name[len] = '\0'; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 793 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 794 | bs = bdrv_find(device_name); |
Jan Kiszka | 4b64036 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 795 | if (!bs) { |
| 796 | fprintf(stderr, "Error unknown block device %s\n", |
| 797 | device_name); |
| 798 | return -EINVAL; |
| 799 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 800 | |
Pierre Riteau | 77358b5 | 2011-01-21 12:42:30 +0100 | [diff] [blame] | 801 | if (bs != bs_prev) { |
| 802 | bs_prev = bs; |
Markus Armbruster | 57322b7 | 2014-06-26 13:23:22 +0200 | [diff] [blame] | 803 | total_sectors = bdrv_nb_sectors(bs); |
Pierre Riteau | 77358b5 | 2011-01-21 12:42:30 +0100 | [diff] [blame] | 804 | if (total_sectors <= 0) { |
Markus Armbruster | 6daf194 | 2011-06-22 14:03:54 +0200 | [diff] [blame] | 805 | error_report("Error getting length of block device %s", |
Pierre Riteau | 77358b5 | 2011-01-21 12:42:30 +0100 | [diff] [blame] | 806 | device_name); |
| 807 | return -EINVAL; |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | if (total_sectors - addr < BDRV_SECTORS_PER_DIRTY_CHUNK) { |
| 812 | nr_sectors = total_sectors - addr; |
| 813 | } else { |
| 814 | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; |
| 815 | } |
| 816 | |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 817 | if (flags & BLK_MIG_FLAG_ZERO_BLOCK) { |
Peter Lieven | d32f35c | 2013-10-24 12:06:52 +0200 | [diff] [blame] | 818 | ret = bdrv_write_zeroes(bs, addr, nr_sectors, |
| 819 | BDRV_REQ_MAY_UNMAP); |
Peter Lieven | 323004a | 2013-07-18 09:48:50 +0200 | [diff] [blame] | 820 | } else { |
| 821 | buf = g_malloc(BLOCK_SIZE); |
| 822 | qemu_get_buffer(f, buf, BLOCK_SIZE); |
| 823 | ret = bdrv_write(bs, addr, buf, nr_sectors); |
| 824 | g_free(buf); |
| 825 | } |
Jan Kiszka | 575a58d | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 826 | |
Yoshiaki Tamura | b02bea3 | 2010-07-20 18:19:00 +0900 | [diff] [blame] | 827 | if (ret < 0) { |
| 828 | return ret; |
| 829 | } |
Jan Kiszka | 01e61e2 | 2009-12-01 15:20:17 +0100 | [diff] [blame] | 830 | } else if (flags & BLK_MIG_FLAG_PROGRESS) { |
| 831 | if (!banner_printed) { |
| 832 | printf("Receiving block device images\n"); |
| 833 | banner_printed = 1; |
| 834 | } |
| 835 | printf("Completed %d %%%c", (int)addr, |
| 836 | (addr == 100) ? '\n' : '\r'); |
| 837 | fflush(stdout); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 838 | } else if (!(flags & BLK_MIG_FLAG_EOS)) { |
Stefan Hajnoczi | d5f1f28 | 2013-02-10 23:12:44 +0100 | [diff] [blame] | 839 | fprintf(stderr, "Unknown block migration flags: %#x\n", flags); |
Jan Kiszka | 4b64036 | 2009-11-30 18:21:21 +0100 | [diff] [blame] | 840 | return -EINVAL; |
| 841 | } |
Juan Quintela | 42802d4 | 2011-10-05 01:14:46 +0200 | [diff] [blame] | 842 | ret = qemu_file_get_error(f); |
| 843 | if (ret != 0) { |
| 844 | return ret; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 845 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 846 | } while (!(flags & BLK_MIG_FLAG_EOS)); |
| 847 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 848 | return 0; |
| 849 | } |
| 850 | |
Isaku Yamahata | 6607ae2 | 2012-06-19 18:43:09 +0300 | [diff] [blame] | 851 | static void block_set_params(const MigrationParams *params, void *opaque) |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 852 | { |
Isaku Yamahata | 6607ae2 | 2012-06-19 18:43:09 +0300 | [diff] [blame] | 853 | block_mig_state.blk_enable = params->blk; |
| 854 | block_mig_state.shared_base = params->shared; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 855 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 856 | /* shared base means that blk_enable = 1 */ |
Isaku Yamahata | 6607ae2 | 2012-06-19 18:43:09 +0300 | [diff] [blame] | 857 | block_mig_state.blk_enable |= params->shared; |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 858 | } |
| 859 | |
Juan Quintela | 6bd6878 | 2012-06-27 10:59:15 +0200 | [diff] [blame] | 860 | static bool block_is_active(void *opaque) |
| 861 | { |
| 862 | return block_mig_state.blk_enable == 1; |
| 863 | } |
| 864 | |
Stefan Weil | 7a46d04 | 2014-07-07 21:09:30 +0200 | [diff] [blame] | 865 | static SaveVMHandlers savevm_block_handlers = { |
Juan Quintela | 7908c78 | 2012-06-26 18:46:10 +0200 | [diff] [blame] | 866 | .set_params = block_set_params, |
Juan Quintela | d1315aa | 2012-06-28 15:11:57 +0200 | [diff] [blame] | 867 | .save_live_setup = block_save_setup, |
Juan Quintela | 16310a3 | 2012-06-28 15:31:37 +0200 | [diff] [blame] | 868 | .save_live_iterate = block_save_iterate, |
| 869 | .save_live_complete = block_save_complete, |
Juan Quintela | e4ed154 | 2012-09-21 11:18:18 +0200 | [diff] [blame] | 870 | .save_live_pending = block_save_pending, |
Juan Quintela | 7908c78 | 2012-06-26 18:46:10 +0200 | [diff] [blame] | 871 | .load_state = block_load, |
Juan Quintela | 9b5bfab | 2012-06-26 19:26:41 +0200 | [diff] [blame] | 872 | .cancel = block_migration_cancel, |
Juan Quintela | 6bd6878 | 2012-06-27 10:59:15 +0200 | [diff] [blame] | 873 | .is_active = block_is_active, |
Juan Quintela | 7908c78 | 2012-06-26 18:46:10 +0200 | [diff] [blame] | 874 | }; |
| 875 | |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 876 | void blk_mig_init(void) |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 877 | { |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 878 | QSIMPLEQ_INIT(&block_mig_state.bmds_list); |
| 879 | QSIMPLEQ_INIT(&block_mig_state.blk_list); |
Paolo Bonzini | 52e850d | 2013-02-22 17:36:25 +0100 | [diff] [blame] | 880 | qemu_mutex_init(&block_mig_state.lock); |
Jan Kiszka | 5e5328b | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 881 | |
Juan Quintela | 7908c78 | 2012-06-26 18:46:10 +0200 | [diff] [blame] | 882 | register_savevm_live(NULL, "block", 0, 1, &savevm_block_handlers, |
| 883 | &block_mig_state); |
lirans@il.ibm.com | c163b5c | 2009-11-02 15:40:58 +0200 | [diff] [blame] | 884 | } |