root / block-migration.c @ 3329f07b
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1 | c163b5ca | lirans@il.ibm.com | /*
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2 | c163b5ca | lirans@il.ibm.com | * QEMU live block migration
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3 | c163b5ca | lirans@il.ibm.com | *
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4 | c163b5ca | lirans@il.ibm.com | * Copyright IBM, Corp. 2009
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5 | c163b5ca | lirans@il.ibm.com | *
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6 | c163b5ca | lirans@il.ibm.com | * Authors:
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7 | c163b5ca | lirans@il.ibm.com | * Liran Schour <lirans@il.ibm.com>
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8 | c163b5ca | lirans@il.ibm.com | *
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9 | c163b5ca | lirans@il.ibm.com | * This work is licensed under the terms of the GNU GPL, version 2. See
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10 | c163b5ca | lirans@il.ibm.com | * the COPYING file in the top-level directory.
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11 | c163b5ca | lirans@il.ibm.com | *
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12 | c163b5ca | lirans@il.ibm.com | */
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13 | c163b5ca | lirans@il.ibm.com | |
14 | c163b5ca | lirans@il.ibm.com | #include "qemu-common.h" |
15 | c163b5ca | lirans@il.ibm.com | #include "block_int.h" |
16 | c163b5ca | lirans@il.ibm.com | #include "hw/hw.h" |
17 | 5e5328be | Jan Kiszka | #include "qemu-queue.h" |
18 | 889ae39c | Liran Schour | #include "qemu-timer.h" |
19 | 7184049e | Jan Kiszka | #include "monitor.h" |
20 | c163b5ca | lirans@il.ibm.com | #include "block-migration.h" |
21 | 889ae39c | Liran Schour | #include "migration.h" |
22 | c163b5ca | lirans@il.ibm.com | #include <assert.h> |
23 | c163b5ca | lirans@il.ibm.com | |
24 | 6ea44308 | Jan Kiszka | #define BLOCK_SIZE (BDRV_SECTORS_PER_DIRTY_CHUNK << BDRV_SECTOR_BITS)
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25 | c163b5ca | lirans@il.ibm.com | |
26 | c163b5ca | lirans@il.ibm.com | #define BLK_MIG_FLAG_DEVICE_BLOCK 0x01 |
27 | c163b5ca | lirans@il.ibm.com | #define BLK_MIG_FLAG_EOS 0x02 |
28 | 01e61e2d | Jan Kiszka | #define BLK_MIG_FLAG_PROGRESS 0x04 |
29 | c163b5ca | lirans@il.ibm.com | |
30 | c163b5ca | lirans@il.ibm.com | #define MAX_IS_ALLOCATED_SEARCH 65536 |
31 | c163b5ca | lirans@il.ibm.com | |
32 | c163b5ca | lirans@il.ibm.com | //#define DEBUG_BLK_MIGRATION
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33 | c163b5ca | lirans@il.ibm.com | |
34 | c163b5ca | lirans@il.ibm.com | #ifdef DEBUG_BLK_MIGRATION
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35 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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36 | c163b5ca | lirans@il.ibm.com | do { printf("blk_migration: " fmt, ## __VA_ARGS__); } while (0) |
37 | c163b5ca | lirans@il.ibm.com | #else
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38 | d0f2c4c6 | malc | #define DPRINTF(fmt, ...) \
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39 | c163b5ca | lirans@il.ibm.com | do { } while (0) |
40 | c163b5ca | lirans@il.ibm.com | #endif
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41 | c163b5ca | lirans@il.ibm.com | |
42 | a55eb92c | Jan Kiszka | typedef struct BlkMigDevState { |
43 | a55eb92c | Jan Kiszka | BlockDriverState *bs; |
44 | a55eb92c | Jan Kiszka | int bulk_completed;
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45 | a55eb92c | Jan Kiszka | int shared_base;
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46 | a55eb92c | Jan Kiszka | int64_t cur_sector; |
47 | d76cac7d | Liran Schour | int64_t cur_dirty; |
48 | 82801d8f | Jan Kiszka | int64_t completed_sectors; |
49 | a55eb92c | Jan Kiszka | int64_t total_sectors; |
50 | a55eb92c | Jan Kiszka | int64_t dirty; |
51 | 5e5328be | Jan Kiszka | QSIMPLEQ_ENTRY(BlkMigDevState) entry; |
52 | a55eb92c | Jan Kiszka | } BlkMigDevState; |
53 | a55eb92c | Jan Kiszka | |
54 | c163b5ca | lirans@il.ibm.com | typedef struct BlkMigBlock { |
55 | c163b5ca | lirans@il.ibm.com | uint8_t *buf; |
56 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
57 | c163b5ca | lirans@il.ibm.com | int64_t sector; |
58 | c163b5ca | lirans@il.ibm.com | struct iovec iov;
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59 | c163b5ca | lirans@il.ibm.com | QEMUIOVector qiov; |
60 | c163b5ca | lirans@il.ibm.com | BlockDriverAIOCB *aiocb; |
61 | c163b5ca | lirans@il.ibm.com | int ret;
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62 | 889ae39c | Liran Schour | int64_t time; |
63 | 5e5328be | Jan Kiszka | QSIMPLEQ_ENTRY(BlkMigBlock) entry; |
64 | c163b5ca | lirans@il.ibm.com | } BlkMigBlock; |
65 | c163b5ca | lirans@il.ibm.com | |
66 | c163b5ca | lirans@il.ibm.com | typedef struct BlkMigState { |
67 | c163b5ca | lirans@il.ibm.com | int blk_enable;
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68 | c163b5ca | lirans@il.ibm.com | int shared_base;
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69 | 5e5328be | Jan Kiszka | QSIMPLEQ_HEAD(bmds_list, BlkMigDevState) bmds_list; |
70 | 5e5328be | Jan Kiszka | QSIMPLEQ_HEAD(blk_list, BlkMigBlock) blk_list; |
71 | c163b5ca | lirans@il.ibm.com | int submitted;
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72 | c163b5ca | lirans@il.ibm.com | int read_done;
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73 | c163b5ca | lirans@il.ibm.com | int transferred;
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74 | 82801d8f | Jan Kiszka | int64_t total_sector_sum; |
75 | 01e61e2d | Jan Kiszka | int prev_progress;
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76 | e970ec0b | Liran Schour | int bulk_completed;
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77 | 889ae39c | Liran Schour | long double total_time; |
78 | 889ae39c | Liran Schour | int reads;
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79 | c163b5ca | lirans@il.ibm.com | } BlkMigState; |
80 | c163b5ca | lirans@il.ibm.com | |
81 | d11ecd3d | Jan Kiszka | static BlkMigState block_mig_state;
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82 | c163b5ca | lirans@il.ibm.com | |
83 | 13f0b67f | Jan Kiszka | static void blk_send(QEMUFile *f, BlkMigBlock * blk) |
84 | 13f0b67f | Jan Kiszka | { |
85 | 13f0b67f | Jan Kiszka | int len;
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86 | 13f0b67f | Jan Kiszka | |
87 | 13f0b67f | Jan Kiszka | /* sector number and flags */
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88 | 13f0b67f | Jan Kiszka | qemu_put_be64(f, (blk->sector << BDRV_SECTOR_BITS) |
89 | 13f0b67f | Jan Kiszka | | BLK_MIG_FLAG_DEVICE_BLOCK); |
90 | 13f0b67f | Jan Kiszka | |
91 | 13f0b67f | Jan Kiszka | /* device name */
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92 | 13f0b67f | Jan Kiszka | len = strlen(blk->bmds->bs->device_name); |
93 | 13f0b67f | Jan Kiszka | qemu_put_byte(f, len); |
94 | 13f0b67f | Jan Kiszka | qemu_put_buffer(f, (uint8_t *)blk->bmds->bs->device_name, len); |
95 | 13f0b67f | Jan Kiszka | |
96 | 13f0b67f | Jan Kiszka | qemu_put_buffer(f, blk->buf, BLOCK_SIZE); |
97 | 13f0b67f | Jan Kiszka | } |
98 | 13f0b67f | Jan Kiszka | |
99 | 25f23643 | Jan Kiszka | int blk_mig_active(void) |
100 | 25f23643 | Jan Kiszka | { |
101 | 25f23643 | Jan Kiszka | return !QSIMPLEQ_EMPTY(&block_mig_state.bmds_list);
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102 | 25f23643 | Jan Kiszka | } |
103 | 25f23643 | Jan Kiszka | |
104 | 25f23643 | Jan Kiszka | uint64_t blk_mig_bytes_transferred(void)
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105 | 25f23643 | Jan Kiszka | { |
106 | 25f23643 | Jan Kiszka | BlkMigDevState *bmds; |
107 | 25f23643 | Jan Kiszka | uint64_t sum = 0;
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108 | 25f23643 | Jan Kiszka | |
109 | 25f23643 | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
110 | 25f23643 | Jan Kiszka | sum += bmds->completed_sectors; |
111 | 25f23643 | Jan Kiszka | } |
112 | 25f23643 | Jan Kiszka | return sum << BDRV_SECTOR_BITS;
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113 | 25f23643 | Jan Kiszka | } |
114 | 25f23643 | Jan Kiszka | |
115 | 25f23643 | Jan Kiszka | uint64_t blk_mig_bytes_remaining(void)
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116 | 25f23643 | Jan Kiszka | { |
117 | 25f23643 | Jan Kiszka | return blk_mig_bytes_total() - blk_mig_bytes_transferred();
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118 | 25f23643 | Jan Kiszka | } |
119 | 25f23643 | Jan Kiszka | |
120 | 25f23643 | Jan Kiszka | uint64_t blk_mig_bytes_total(void)
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121 | 25f23643 | Jan Kiszka | { |
122 | 25f23643 | Jan Kiszka | BlkMigDevState *bmds; |
123 | 25f23643 | Jan Kiszka | uint64_t sum = 0;
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124 | 25f23643 | Jan Kiszka | |
125 | 25f23643 | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
126 | 25f23643 | Jan Kiszka | sum += bmds->total_sectors; |
127 | 25f23643 | Jan Kiszka | } |
128 | 25f23643 | Jan Kiszka | return sum << BDRV_SECTOR_BITS;
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129 | 25f23643 | Jan Kiszka | } |
130 | 25f23643 | Jan Kiszka | |
131 | 889ae39c | Liran Schour | static inline void add_avg_read_time(int64_t time) |
132 | 889ae39c | Liran Schour | { |
133 | 889ae39c | Liran Schour | block_mig_state.reads++; |
134 | 889ae39c | Liran Schour | block_mig_state.total_time += time; |
135 | 889ae39c | Liran Schour | } |
136 | 889ae39c | Liran Schour | |
137 | 889ae39c | Liran Schour | static inline long double compute_read_bwidth(void) |
138 | 889ae39c | Liran Schour | { |
139 | 889ae39c | Liran Schour | assert(block_mig_state.total_time != 0);
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140 | 889ae39c | Liran Schour | return (block_mig_state.reads * BLOCK_SIZE)/ block_mig_state.total_time;
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141 | 889ae39c | Liran Schour | } |
142 | 889ae39c | Liran Schour | |
143 | c163b5ca | lirans@il.ibm.com | static void blk_mig_read_cb(void *opaque, int ret) |
144 | c163b5ca | lirans@il.ibm.com | { |
145 | c163b5ca | lirans@il.ibm.com | BlkMigBlock *blk = opaque; |
146 | a55eb92c | Jan Kiszka | |
147 | c163b5ca | lirans@il.ibm.com | blk->ret = ret; |
148 | a55eb92c | Jan Kiszka | |
149 | 889ae39c | Liran Schour | blk->time = qemu_get_clock_ns(rt_clock) - blk->time; |
150 | 889ae39c | Liran Schour | |
151 | 889ae39c | Liran Schour | add_avg_read_time(blk->time); |
152 | 889ae39c | Liran Schour | |
153 | 5e5328be | Jan Kiszka | QSIMPLEQ_INSERT_TAIL(&block_mig_state.blk_list, blk, entry); |
154 | a55eb92c | Jan Kiszka | |
155 | d11ecd3d | Jan Kiszka | block_mig_state.submitted--; |
156 | d11ecd3d | Jan Kiszka | block_mig_state.read_done++; |
157 | d11ecd3d | Jan Kiszka | assert(block_mig_state.submitted >= 0);
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158 | c163b5ca | lirans@il.ibm.com | } |
159 | c163b5ca | lirans@il.ibm.com | |
160 | 7184049e | Jan Kiszka | static int mig_save_device_bulk(Monitor *mon, QEMUFile *f, |
161 | e970ec0b | Liran Schour | BlkMigDevState *bmds) |
162 | a55eb92c | Jan Kiszka | { |
163 | 57cce12d | Jan Kiszka | int64_t total_sectors = bmds->total_sectors; |
164 | 57cce12d | Jan Kiszka | int64_t cur_sector = bmds->cur_sector; |
165 | 57cce12d | Jan Kiszka | BlockDriverState *bs = bmds->bs; |
166 | c163b5ca | lirans@il.ibm.com | BlkMigBlock *blk; |
167 | 13f0b67f | Jan Kiszka | int nr_sectors;
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168 | a55eb92c | Jan Kiszka | |
169 | 57cce12d | Jan Kiszka | if (bmds->shared_base) {
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170 | b1d10856 | Jan Kiszka | while (cur_sector < total_sectors &&
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171 | 57cce12d | Jan Kiszka | !bdrv_is_allocated(bs, cur_sector, MAX_IS_ALLOCATED_SEARCH, |
172 | 57cce12d | Jan Kiszka | &nr_sectors)) { |
173 | c163b5ca | lirans@il.ibm.com | cur_sector += nr_sectors; |
174 | c163b5ca | lirans@il.ibm.com | } |
175 | c163b5ca | lirans@il.ibm.com | } |
176 | a55eb92c | Jan Kiszka | |
177 | a55eb92c | Jan Kiszka | if (cur_sector >= total_sectors) {
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178 | 82801d8f | Jan Kiszka | bmds->cur_sector = bmds->completed_sectors = total_sectors; |
179 | c163b5ca | lirans@il.ibm.com | return 1; |
180 | c163b5ca | lirans@il.ibm.com | } |
181 | a55eb92c | Jan Kiszka | |
182 | 82801d8f | Jan Kiszka | bmds->completed_sectors = cur_sector; |
183 | a55eb92c | Jan Kiszka | |
184 | 57cce12d | Jan Kiszka | cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1);
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185 | 57cce12d | Jan Kiszka | |
186 | 6ea44308 | Jan Kiszka | /* we are going to transfer a full block even if it is not allocated */
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187 | 6ea44308 | Jan Kiszka | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; |
188 | c163b5ca | lirans@il.ibm.com | |
189 | 6ea44308 | Jan Kiszka | if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {
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190 | 57cce12d | Jan Kiszka | nr_sectors = total_sectors - cur_sector; |
191 | c163b5ca | lirans@il.ibm.com | } |
192 | a55eb92c | Jan Kiszka | |
193 | 13f0b67f | Jan Kiszka | blk = qemu_malloc(sizeof(BlkMigBlock));
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194 | 13f0b67f | Jan Kiszka | blk->buf = qemu_malloc(BLOCK_SIZE); |
195 | 13f0b67f | Jan Kiszka | blk->bmds = bmds; |
196 | 13f0b67f | Jan Kiszka | blk->sector = cur_sector; |
197 | a55eb92c | Jan Kiszka | |
198 | e970ec0b | Liran Schour | blk->iov.iov_base = blk->buf; |
199 | e970ec0b | Liran Schour | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; |
200 | e970ec0b | Liran Schour | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1);
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201 | a55eb92c | Jan Kiszka | |
202 | 889ae39c | Liran Schour | blk->time = qemu_get_clock_ns(rt_clock); |
203 | 889ae39c | Liran Schour | |
204 | e970ec0b | Liran Schour | blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov, |
205 | e970ec0b | Liran Schour | nr_sectors, blk_mig_read_cb, blk); |
206 | e970ec0b | Liran Schour | if (!blk->aiocb) {
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207 | e970ec0b | Liran Schour | goto error;
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208 | c163b5ca | lirans@il.ibm.com | } |
209 | e970ec0b | Liran Schour | block_mig_state.submitted++; |
210 | d76cac7d | Liran Schour | |
211 | 13f0b67f | Jan Kiszka | bdrv_reset_dirty(bs, cur_sector, nr_sectors); |
212 | 13f0b67f | Jan Kiszka | bmds->cur_sector = cur_sector + nr_sectors; |
213 | a55eb92c | Jan Kiszka | |
214 | 13f0b67f | Jan Kiszka | return (bmds->cur_sector >= total_sectors);
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215 | 4b640365 | Jan Kiszka | |
216 | 4b640365 | Jan Kiszka | error:
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217 | 7184049e | Jan Kiszka | monitor_printf(mon, "Error reading sector %" PRId64 "\n", cur_sector); |
218 | 4b640365 | Jan Kiszka | qemu_file_set_error(f); |
219 | 4b640365 | Jan Kiszka | qemu_free(blk->buf); |
220 | 4b640365 | Jan Kiszka | qemu_free(blk); |
221 | 4b640365 | Jan Kiszka | return 0; |
222 | c163b5ca | lirans@il.ibm.com | } |
223 | c163b5ca | lirans@il.ibm.com | |
224 | c163b5ca | lirans@il.ibm.com | static void set_dirty_tracking(int enable) |
225 | c163b5ca | lirans@il.ibm.com | { |
226 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
227 | 5e5328be | Jan Kiszka | |
228 | 5e5328be | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
229 | a55eb92c | Jan Kiszka | bdrv_set_dirty_tracking(bmds->bs, enable); |
230 | c163b5ca | lirans@il.ibm.com | } |
231 | c163b5ca | lirans@il.ibm.com | } |
232 | c163b5ca | lirans@il.ibm.com | |
233 | b66460e4 | Stefan Hajnoczi | static void init_blk_migration_it(void *opaque, BlockDriverState *bs) |
234 | c163b5ca | lirans@il.ibm.com | { |
235 | b66460e4 | Stefan Hajnoczi | Monitor *mon = opaque; |
236 | 5e5328be | Jan Kiszka | BlkMigDevState *bmds; |
237 | 792773b2 | Jan Kiszka | int64_t sectors; |
238 | a55eb92c | Jan Kiszka | |
239 | d246673d | Markus Armbruster | if (!bdrv_is_read_only(bs)) {
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240 | b66460e4 | Stefan Hajnoczi | sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
241 | 31f54f24 | Shahar Havivi | if (sectors <= 0) { |
242 | b66460e4 | Stefan Hajnoczi | return;
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243 | b66460e4 | Stefan Hajnoczi | } |
244 | b66460e4 | Stefan Hajnoczi | |
245 | b66460e4 | Stefan Hajnoczi | bmds = qemu_mallocz(sizeof(BlkMigDevState));
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246 | b66460e4 | Stefan Hajnoczi | bmds->bs = bs; |
247 | b66460e4 | Stefan Hajnoczi | bmds->bulk_completed = 0;
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248 | b66460e4 | Stefan Hajnoczi | bmds->total_sectors = sectors; |
249 | b66460e4 | Stefan Hajnoczi | bmds->completed_sectors = 0;
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250 | b66460e4 | Stefan Hajnoczi | bmds->shared_base = block_mig_state.shared_base; |
251 | b66460e4 | Stefan Hajnoczi | |
252 | b66460e4 | Stefan Hajnoczi | block_mig_state.total_sector_sum += sectors; |
253 | b66460e4 | Stefan Hajnoczi | |
254 | b66460e4 | Stefan Hajnoczi | if (bmds->shared_base) {
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255 | b66460e4 | Stefan Hajnoczi | monitor_printf(mon, "Start migration for %s with shared base "
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256 | b66460e4 | Stefan Hajnoczi | "image\n",
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257 | b66460e4 | Stefan Hajnoczi | bs->device_name); |
258 | b66460e4 | Stefan Hajnoczi | } else {
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259 | b66460e4 | Stefan Hajnoczi | monitor_printf(mon, "Start full migration for %s\n",
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260 | b66460e4 | Stefan Hajnoczi | bs->device_name); |
261 | b66460e4 | Stefan Hajnoczi | } |
262 | b66460e4 | Stefan Hajnoczi | |
263 | b66460e4 | Stefan Hajnoczi | QSIMPLEQ_INSERT_TAIL(&block_mig_state.bmds_list, bmds, entry); |
264 | b66460e4 | Stefan Hajnoczi | } |
265 | b66460e4 | Stefan Hajnoczi | } |
266 | b66460e4 | Stefan Hajnoczi | |
267 | b66460e4 | Stefan Hajnoczi | static void init_blk_migration(Monitor *mon, QEMUFile *f) |
268 | b66460e4 | Stefan Hajnoczi | { |
269 | 69d63a97 | Jan Kiszka | block_mig_state.submitted = 0;
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270 | 69d63a97 | Jan Kiszka | block_mig_state.read_done = 0;
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271 | 69d63a97 | Jan Kiszka | block_mig_state.transferred = 0;
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272 | 82801d8f | Jan Kiszka | block_mig_state.total_sector_sum = 0;
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273 | 01e61e2d | Jan Kiszka | block_mig_state.prev_progress = -1;
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274 | e970ec0b | Liran Schour | block_mig_state.bulk_completed = 0;
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275 | 889ae39c | Liran Schour | block_mig_state.total_time = 0;
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276 | 889ae39c | Liran Schour | block_mig_state.reads = 0;
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277 | 69d63a97 | Jan Kiszka | |
278 | b66460e4 | Stefan Hajnoczi | bdrv_iterate(init_blk_migration_it, mon); |
279 | c163b5ca | lirans@il.ibm.com | } |
280 | c163b5ca | lirans@il.ibm.com | |
281 | e970ec0b | Liran Schour | static int blk_mig_save_bulked_block(Monitor *mon, QEMUFile *f) |
282 | c163b5ca | lirans@il.ibm.com | { |
283 | 82801d8f | Jan Kiszka | int64_t completed_sector_sum = 0;
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284 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
285 | 01e61e2d | Jan Kiszka | int progress;
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286 | 82801d8f | Jan Kiszka | int ret = 0; |
287 | c163b5ca | lirans@il.ibm.com | |
288 | 5e5328be | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
289 | a55eb92c | Jan Kiszka | if (bmds->bulk_completed == 0) { |
290 | e970ec0b | Liran Schour | if (mig_save_device_bulk(mon, f, bmds) == 1) { |
291 | 57cce12d | Jan Kiszka | /* completed bulk section for this device */
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292 | 57cce12d | Jan Kiszka | bmds->bulk_completed = 1;
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293 | c163b5ca | lirans@il.ibm.com | } |
294 | 82801d8f | Jan Kiszka | completed_sector_sum += bmds->completed_sectors; |
295 | 82801d8f | Jan Kiszka | ret = 1;
|
296 | 82801d8f | Jan Kiszka | break;
|
297 | 82801d8f | Jan Kiszka | } else {
|
298 | 82801d8f | Jan Kiszka | completed_sector_sum += bmds->completed_sectors; |
299 | c163b5ca | lirans@il.ibm.com | } |
300 | c163b5ca | lirans@il.ibm.com | } |
301 | a55eb92c | Jan Kiszka | |
302 | 01e61e2d | Jan Kiszka | progress = completed_sector_sum * 100 / block_mig_state.total_sector_sum;
|
303 | 01e61e2d | Jan Kiszka | if (progress != block_mig_state.prev_progress) {
|
304 | 01e61e2d | Jan Kiszka | block_mig_state.prev_progress = progress; |
305 | 01e61e2d | Jan Kiszka | qemu_put_be64(f, (progress << BDRV_SECTOR_BITS) |
306 | 01e61e2d | Jan Kiszka | | BLK_MIG_FLAG_PROGRESS); |
307 | 01e61e2d | Jan Kiszka | monitor_printf(mon, "Completed %d %%\r", progress);
|
308 | 7184049e | Jan Kiszka | monitor_flush(mon); |
309 | 82801d8f | Jan Kiszka | } |
310 | 82801d8f | Jan Kiszka | |
311 | 82801d8f | Jan Kiszka | return ret;
|
312 | c163b5ca | lirans@il.ibm.com | } |
313 | c163b5ca | lirans@il.ibm.com | |
314 | d76cac7d | Liran Schour | static void blk_mig_reset_dirty_cursor(void) |
315 | c163b5ca | lirans@il.ibm.com | { |
316 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
317 | d76cac7d | Liran Schour | |
318 | d76cac7d | Liran Schour | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
319 | d76cac7d | Liran Schour | bmds->cur_dirty = 0;
|
320 | d76cac7d | Liran Schour | } |
321 | d76cac7d | Liran Schour | } |
322 | d76cac7d | Liran Schour | |
323 | d76cac7d | Liran Schour | static int mig_save_device_dirty(Monitor *mon, QEMUFile *f, |
324 | d76cac7d | Liran Schour | BlkMigDevState *bmds, int is_async)
|
325 | d76cac7d | Liran Schour | { |
326 | d76cac7d | Liran Schour | BlkMigBlock *blk; |
327 | d76cac7d | Liran Schour | int64_t total_sectors = bmds->total_sectors; |
328 | c163b5ca | lirans@il.ibm.com | int64_t sector; |
329 | d76cac7d | Liran Schour | int nr_sectors;
|
330 | a55eb92c | Jan Kiszka | |
331 | d76cac7d | Liran Schour | for (sector = bmds->cur_dirty; sector < bmds->total_sectors;) {
|
332 | d76cac7d | Liran Schour | if (bdrv_get_dirty(bmds->bs, sector)) {
|
333 | 575a58d7 | Jan Kiszka | |
334 | d76cac7d | Liran Schour | if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {
|
335 | d76cac7d | Liran Schour | nr_sectors = total_sectors - sector; |
336 | d76cac7d | Liran Schour | } else {
|
337 | d76cac7d | Liran Schour | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; |
338 | d76cac7d | Liran Schour | } |
339 | d76cac7d | Liran Schour | blk = qemu_malloc(sizeof(BlkMigBlock));
|
340 | d76cac7d | Liran Schour | blk->buf = qemu_malloc(BLOCK_SIZE); |
341 | d76cac7d | Liran Schour | blk->bmds = bmds; |
342 | d76cac7d | Liran Schour | blk->sector = sector; |
343 | d76cac7d | Liran Schour | |
344 | 889ae39c | Liran Schour | if (is_async) {
|
345 | d76cac7d | Liran Schour | blk->iov.iov_base = blk->buf; |
346 | d76cac7d | Liran Schour | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; |
347 | d76cac7d | Liran Schour | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1);
|
348 | d76cac7d | Liran Schour | |
349 | bd0858bb | Yoshiaki Tamura | blk->time = qemu_get_clock_ns(rt_clock); |
350 | 889ae39c | Liran Schour | |
351 | d76cac7d | Liran Schour | blk->aiocb = bdrv_aio_readv(bmds->bs, sector, &blk->qiov, |
352 | d76cac7d | Liran Schour | nr_sectors, blk_mig_read_cb, blk); |
353 | d76cac7d | Liran Schour | if (!blk->aiocb) {
|
354 | d76cac7d | Liran Schour | goto error;
|
355 | d76cac7d | Liran Schour | } |
356 | d76cac7d | Liran Schour | block_mig_state.submitted++; |
357 | d76cac7d | Liran Schour | } else {
|
358 | d76cac7d | Liran Schour | if (bdrv_read(bmds->bs, sector, blk->buf,
|
359 | d76cac7d | Liran Schour | nr_sectors) < 0) {
|
360 | d76cac7d | Liran Schour | goto error;
|
361 | c163b5ca | lirans@il.ibm.com | } |
362 | d76cac7d | Liran Schour | blk_send(f, blk); |
363 | a55eb92c | Jan Kiszka | |
364 | d76cac7d | Liran Schour | qemu_free(blk->buf); |
365 | d76cac7d | Liran Schour | qemu_free(blk); |
366 | a55eb92c | Jan Kiszka | } |
367 | d76cac7d | Liran Schour | |
368 | d76cac7d | Liran Schour | bdrv_reset_dirty(bmds->bs, sector, nr_sectors); |
369 | d76cac7d | Liran Schour | break;
|
370 | c163b5ca | lirans@il.ibm.com | } |
371 | d76cac7d | Liran Schour | sector += BDRV_SECTORS_PER_DIRTY_CHUNK; |
372 | d76cac7d | Liran Schour | bmds->cur_dirty = sector; |
373 | c163b5ca | lirans@il.ibm.com | } |
374 | 575a58d7 | Jan Kiszka | |
375 | d76cac7d | Liran Schour | return (bmds->cur_dirty >= bmds->total_sectors);
|
376 | d76cac7d | Liran Schour | |
377 | 889ae39c | Liran Schour | error:
|
378 | d76cac7d | Liran Schour | monitor_printf(mon, "Error reading sector %" PRId64 "\n", sector); |
379 | d76cac7d | Liran Schour | qemu_file_set_error(f); |
380 | d76cac7d | Liran Schour | qemu_free(blk->buf); |
381 | d76cac7d | Liran Schour | qemu_free(blk); |
382 | d76cac7d | Liran Schour | return 0; |
383 | d76cac7d | Liran Schour | } |
384 | d76cac7d | Liran Schour | |
385 | d76cac7d | Liran Schour | static int blk_mig_save_dirty_block(Monitor *mon, QEMUFile *f, int is_async) |
386 | d76cac7d | Liran Schour | { |
387 | d76cac7d | Liran Schour | BlkMigDevState *bmds; |
388 | d76cac7d | Liran Schour | int ret = 0; |
389 | d76cac7d | Liran Schour | |
390 | d76cac7d | Liran Schour | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
391 | 889ae39c | Liran Schour | if (mig_save_device_dirty(mon, f, bmds, is_async) == 0) { |
392 | d76cac7d | Liran Schour | ret = 1;
|
393 | d76cac7d | Liran Schour | break;
|
394 | d76cac7d | Liran Schour | } |
395 | d76cac7d | Liran Schour | } |
396 | d76cac7d | Liran Schour | |
397 | d76cac7d | Liran Schour | return ret;
|
398 | c163b5ca | lirans@il.ibm.com | } |
399 | c163b5ca | lirans@il.ibm.com | |
400 | c163b5ca | lirans@il.ibm.com | static void flush_blks(QEMUFile* f) |
401 | c163b5ca | lirans@il.ibm.com | { |
402 | 5e5328be | Jan Kiszka | BlkMigBlock *blk; |
403 | a55eb92c | Jan Kiszka | |
404 | d0f2c4c6 | malc | DPRINTF("%s Enter submitted %d read_done %d transferred %d\n",
|
405 | d11ecd3d | Jan Kiszka | __FUNCTION__, block_mig_state.submitted, block_mig_state.read_done, |
406 | d11ecd3d | Jan Kiszka | block_mig_state.transferred); |
407 | a55eb92c | Jan Kiszka | |
408 | 5e5328be | Jan Kiszka | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
409 | 5e5328be | Jan Kiszka | if (qemu_file_rate_limit(f)) {
|
410 | 5e5328be | Jan Kiszka | break;
|
411 | 5e5328be | Jan Kiszka | } |
412 | 4b640365 | Jan Kiszka | if (blk->ret < 0) { |
413 | 4b640365 | Jan Kiszka | qemu_file_set_error(f); |
414 | 4b640365 | Jan Kiszka | break;
|
415 | 4b640365 | Jan Kiszka | } |
416 | 13f0b67f | Jan Kiszka | blk_send(f, blk); |
417 | a55eb92c | Jan Kiszka | |
418 | 5e5328be | Jan Kiszka | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
419 | c163b5ca | lirans@il.ibm.com | qemu_free(blk->buf); |
420 | c163b5ca | lirans@il.ibm.com | qemu_free(blk); |
421 | a55eb92c | Jan Kiszka | |
422 | d11ecd3d | Jan Kiszka | block_mig_state.read_done--; |
423 | d11ecd3d | Jan Kiszka | block_mig_state.transferred++; |
424 | d11ecd3d | Jan Kiszka | assert(block_mig_state.read_done >= 0);
|
425 | c163b5ca | lirans@il.ibm.com | } |
426 | c163b5ca | lirans@il.ibm.com | |
427 | d0f2c4c6 | malc | DPRINTF("%s Exit submitted %d read_done %d transferred %d\n", __FUNCTION__,
|
428 | d11ecd3d | Jan Kiszka | block_mig_state.submitted, block_mig_state.read_done, |
429 | d11ecd3d | Jan Kiszka | block_mig_state.transferred); |
430 | c163b5ca | lirans@il.ibm.com | } |
431 | c163b5ca | lirans@il.ibm.com | |
432 | 889ae39c | Liran Schour | static int64_t get_remaining_dirty(void) |
433 | 889ae39c | Liran Schour | { |
434 | 889ae39c | Liran Schour | BlkMigDevState *bmds; |
435 | 889ae39c | Liran Schour | int64_t dirty = 0;
|
436 | 889ae39c | Liran Schour | |
437 | 889ae39c | Liran Schour | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
438 | 889ae39c | Liran Schour | dirty += bdrv_get_dirty_count(bmds->bs); |
439 | 889ae39c | Liran Schour | } |
440 | 889ae39c | Liran Schour | |
441 | 889ae39c | Liran Schour | return dirty * BLOCK_SIZE;
|
442 | 889ae39c | Liran Schour | } |
443 | 889ae39c | Liran Schour | |
444 | c163b5ca | lirans@il.ibm.com | static int is_stage2_completed(void) |
445 | c163b5ca | lirans@il.ibm.com | { |
446 | 889ae39c | Liran Schour | int64_t remaining_dirty; |
447 | 889ae39c | Liran Schour | long double bwidth; |
448 | 889ae39c | Liran Schour | |
449 | 889ae39c | Liran Schour | if (block_mig_state.bulk_completed == 1) { |
450 | 889ae39c | Liran Schour | |
451 | 889ae39c | Liran Schour | remaining_dirty = get_remaining_dirty(); |
452 | bd0858bb | Yoshiaki Tamura | if (remaining_dirty == 0) { |
453 | bd0858bb | Yoshiaki Tamura | return 1; |
454 | bd0858bb | Yoshiaki Tamura | } |
455 | 889ae39c | Liran Schour | |
456 | bd0858bb | Yoshiaki Tamura | bwidth = compute_read_bwidth(); |
457 | 889ae39c | Liran Schour | |
458 | bd0858bb | Yoshiaki Tamura | if ((remaining_dirty / bwidth) <=
|
459 | 889ae39c | Liran Schour | migrate_max_downtime()) { |
460 | 889ae39c | Liran Schour | /* finish stage2 because we think that we can finish remaing work
|
461 | 889ae39c | Liran Schour | below max_downtime */
|
462 | 889ae39c | Liran Schour | |
463 | 889ae39c | Liran Schour | return 1; |
464 | 889ae39c | Liran Schour | } |
465 | 889ae39c | Liran Schour | } |
466 | 889ae39c | Liran Schour | |
467 | 889ae39c | Liran Schour | return 0; |
468 | c163b5ca | lirans@il.ibm.com | } |
469 | c163b5ca | lirans@il.ibm.com | |
470 | 7184049e | Jan Kiszka | static void blk_mig_cleanup(Monitor *mon) |
471 | 4ec7fcc7 | Jan Kiszka | { |
472 | 82801d8f | Jan Kiszka | BlkMigDevState *bmds; |
473 | 82801d8f | Jan Kiszka | BlkMigBlock *blk; |
474 | 4ec7fcc7 | Jan Kiszka | |
475 | 82801d8f | Jan Kiszka | while ((bmds = QSIMPLEQ_FIRST(&block_mig_state.bmds_list)) != NULL) { |
476 | 82801d8f | Jan Kiszka | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.bmds_list, entry); |
477 | 4ec7fcc7 | Jan Kiszka | qemu_free(bmds); |
478 | 4ec7fcc7 | Jan Kiszka | } |
479 | 4ec7fcc7 | Jan Kiszka | |
480 | 82801d8f | Jan Kiszka | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
481 | 82801d8f | Jan Kiszka | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
482 | 4ec7fcc7 | Jan Kiszka | qemu_free(blk->buf); |
483 | 4ec7fcc7 | Jan Kiszka | qemu_free(blk); |
484 | 4ec7fcc7 | Jan Kiszka | } |
485 | 4ec7fcc7 | Jan Kiszka | |
486 | 4ec7fcc7 | Jan Kiszka | set_dirty_tracking(0);
|
487 | 4ec7fcc7 | Jan Kiszka | |
488 | 7184049e | Jan Kiszka | monitor_printf(mon, "\n");
|
489 | 4ec7fcc7 | Jan Kiszka | } |
490 | 4ec7fcc7 | Jan Kiszka | |
491 | f327aa0c | Jan Kiszka | static int block_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque) |
492 | c163b5ca | lirans@il.ibm.com | { |
493 | d0f2c4c6 | malc | DPRINTF("Enter save live stage %d submitted %d transferred %d\n",
|
494 | d11ecd3d | Jan Kiszka | stage, block_mig_state.submitted, block_mig_state.transferred); |
495 | a55eb92c | Jan Kiszka | |
496 | 4ec7fcc7 | Jan Kiszka | if (stage < 0) { |
497 | 7184049e | Jan Kiszka | blk_mig_cleanup(mon); |
498 | 4ec7fcc7 | Jan Kiszka | return 0; |
499 | 4ec7fcc7 | Jan Kiszka | } |
500 | 4ec7fcc7 | Jan Kiszka | |
501 | d11ecd3d | Jan Kiszka | if (block_mig_state.blk_enable != 1) { |
502 | c163b5ca | lirans@il.ibm.com | /* no need to migrate storage */
|
503 | a55eb92c | Jan Kiszka | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
504 | c163b5ca | lirans@il.ibm.com | return 1; |
505 | c163b5ca | lirans@il.ibm.com | } |
506 | a55eb92c | Jan Kiszka | |
507 | a55eb92c | Jan Kiszka | if (stage == 1) { |
508 | 7184049e | Jan Kiszka | init_blk_migration(mon, f); |
509 | a55eb92c | Jan Kiszka | |
510 | c163b5ca | lirans@il.ibm.com | /* start track dirty blocks */
|
511 | c163b5ca | lirans@il.ibm.com | set_dirty_tracking(1);
|
512 | c163b5ca | lirans@il.ibm.com | } |
513 | c163b5ca | lirans@il.ibm.com | |
514 | c163b5ca | lirans@il.ibm.com | flush_blks(f); |
515 | a55eb92c | Jan Kiszka | |
516 | 4b640365 | Jan Kiszka | if (qemu_file_has_error(f)) {
|
517 | 7184049e | Jan Kiszka | blk_mig_cleanup(mon); |
518 | 4b640365 | Jan Kiszka | return 0; |
519 | 4b640365 | Jan Kiszka | } |
520 | 4b640365 | Jan Kiszka | |
521 | d76cac7d | Liran Schour | blk_mig_reset_dirty_cursor(); |
522 | d76cac7d | Liran Schour | |
523 | 889ae39c | Liran Schour | if (stage == 2) { |
524 | d76cac7d | Liran Schour | /* control the rate of transfer */
|
525 | d76cac7d | Liran Schour | while ((block_mig_state.submitted +
|
526 | d76cac7d | Liran Schour | block_mig_state.read_done) * BLOCK_SIZE < |
527 | d76cac7d | Liran Schour | qemu_file_get_rate_limit(f)) { |
528 | d76cac7d | Liran Schour | if (block_mig_state.bulk_completed == 0) { |
529 | d76cac7d | Liran Schour | /* first finish the bulk phase */
|
530 | d76cac7d | Liran Schour | if (blk_mig_save_bulked_block(mon, f) == 0) { |
531 | 889ae39c | Liran Schour | /* finished saving bulk on all devices */
|
532 | d76cac7d | Liran Schour | block_mig_state.bulk_completed = 1;
|
533 | d76cac7d | Liran Schour | } |
534 | d76cac7d | Liran Schour | } else {
|
535 | d76cac7d | Liran Schour | if (blk_mig_save_dirty_block(mon, f, 1) == 0) { |
536 | d76cac7d | Liran Schour | /* no more dirty blocks */
|
537 | d76cac7d | Liran Schour | break;
|
538 | d76cac7d | Liran Schour | } |
539 | d76cac7d | Liran Schour | } |
540 | a55eb92c | Jan Kiszka | } |
541 | a55eb92c | Jan Kiszka | |
542 | d76cac7d | Liran Schour | flush_blks(f); |
543 | a55eb92c | Jan Kiszka | |
544 | d76cac7d | Liran Schour | if (qemu_file_has_error(f)) {
|
545 | d76cac7d | Liran Schour | blk_mig_cleanup(mon); |
546 | d76cac7d | Liran Schour | return 0; |
547 | d76cac7d | Liran Schour | } |
548 | 4b640365 | Jan Kiszka | } |
549 | 4b640365 | Jan Kiszka | |
550 | a55eb92c | Jan Kiszka | if (stage == 3) { |
551 | 889ae39c | Liran Schour | /* we know for sure that save bulk is completed and
|
552 | 889ae39c | Liran Schour | all async read completed */
|
553 | 889ae39c | Liran Schour | assert(block_mig_state.submitted == 0);
|
554 | a55eb92c | Jan Kiszka | |
555 | 889ae39c | Liran Schour | while (blk_mig_save_dirty_block(mon, f, 0) != 0); |
556 | 7184049e | Jan Kiszka | blk_mig_cleanup(mon); |
557 | a55eb92c | Jan Kiszka | |
558 | 01e61e2d | Jan Kiszka | /* report completion */
|
559 | 01e61e2d | Jan Kiszka | qemu_put_be64(f, (100 << BDRV_SECTOR_BITS) | BLK_MIG_FLAG_PROGRESS);
|
560 | 01e61e2d | Jan Kiszka | |
561 | 4b640365 | Jan Kiszka | if (qemu_file_has_error(f)) {
|
562 | 4b640365 | Jan Kiszka | return 0; |
563 | 4b640365 | Jan Kiszka | } |
564 | 4b640365 | Jan Kiszka | |
565 | 7184049e | Jan Kiszka | monitor_printf(mon, "Block migration completed\n");
|
566 | c163b5ca | lirans@il.ibm.com | } |
567 | a55eb92c | Jan Kiszka | |
568 | a55eb92c | Jan Kiszka | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
569 | a55eb92c | Jan Kiszka | |
570 | c163b5ca | lirans@il.ibm.com | return ((stage == 2) && is_stage2_completed()); |
571 | c163b5ca | lirans@il.ibm.com | } |
572 | c163b5ca | lirans@il.ibm.com | |
573 | c163b5ca | lirans@il.ibm.com | static int block_load(QEMUFile *f, void *opaque, int version_id) |
574 | c163b5ca | lirans@il.ibm.com | { |
575 | 01e61e2d | Jan Kiszka | static int banner_printed; |
576 | c163b5ca | lirans@il.ibm.com | int len, flags;
|
577 | c163b5ca | lirans@il.ibm.com | char device_name[256]; |
578 | c163b5ca | lirans@il.ibm.com | int64_t addr; |
579 | c163b5ca | lirans@il.ibm.com | BlockDriverState *bs; |
580 | c163b5ca | lirans@il.ibm.com | uint8_t *buf; |
581 | a55eb92c | Jan Kiszka | |
582 | c163b5ca | lirans@il.ibm.com | do {
|
583 | c163b5ca | lirans@il.ibm.com | addr = qemu_get_be64(f); |
584 | a55eb92c | Jan Kiszka | |
585 | 6ea44308 | Jan Kiszka | flags = addr & ~BDRV_SECTOR_MASK; |
586 | 6ea44308 | Jan Kiszka | addr >>= BDRV_SECTOR_BITS; |
587 | a55eb92c | Jan Kiszka | |
588 | a55eb92c | Jan Kiszka | if (flags & BLK_MIG_FLAG_DEVICE_BLOCK) {
|
589 | b02bea3a | Yoshiaki Tamura | int ret;
|
590 | c163b5ca | lirans@il.ibm.com | /* get device name */
|
591 | c163b5ca | lirans@il.ibm.com | len = qemu_get_byte(f); |
592 | c163b5ca | lirans@il.ibm.com | qemu_get_buffer(f, (uint8_t *)device_name, len); |
593 | c163b5ca | lirans@il.ibm.com | device_name[len] = '\0';
|
594 | a55eb92c | Jan Kiszka | |
595 | c163b5ca | lirans@il.ibm.com | bs = bdrv_find(device_name); |
596 | 4b640365 | Jan Kiszka | if (!bs) {
|
597 | 4b640365 | Jan Kiszka | fprintf(stderr, "Error unknown block device %s\n",
|
598 | 4b640365 | Jan Kiszka | device_name); |
599 | 4b640365 | Jan Kiszka | return -EINVAL;
|
600 | 4b640365 | Jan Kiszka | } |
601 | a55eb92c | Jan Kiszka | |
602 | 575a58d7 | Jan Kiszka | buf = qemu_malloc(BLOCK_SIZE); |
603 | 575a58d7 | Jan Kiszka | |
604 | a55eb92c | Jan Kiszka | qemu_get_buffer(f, buf, BLOCK_SIZE); |
605 | b02bea3a | Yoshiaki Tamura | ret = bdrv_write(bs, addr, buf, BDRV_SECTORS_PER_DIRTY_CHUNK); |
606 | 575a58d7 | Jan Kiszka | |
607 | 575a58d7 | Jan Kiszka | qemu_free(buf); |
608 | b02bea3a | Yoshiaki Tamura | if (ret < 0) { |
609 | b02bea3a | Yoshiaki Tamura | return ret;
|
610 | b02bea3a | Yoshiaki Tamura | } |
611 | 01e61e2d | Jan Kiszka | } else if (flags & BLK_MIG_FLAG_PROGRESS) { |
612 | 01e61e2d | Jan Kiszka | if (!banner_printed) {
|
613 | 01e61e2d | Jan Kiszka | printf("Receiving block device images\n");
|
614 | 01e61e2d | Jan Kiszka | banner_printed = 1;
|
615 | 01e61e2d | Jan Kiszka | } |
616 | 01e61e2d | Jan Kiszka | printf("Completed %d %%%c", (int)addr, |
617 | 01e61e2d | Jan Kiszka | (addr == 100) ? '\n' : '\r'); |
618 | 01e61e2d | Jan Kiszka | fflush(stdout); |
619 | a55eb92c | Jan Kiszka | } else if (!(flags & BLK_MIG_FLAG_EOS)) { |
620 | 4b640365 | Jan Kiszka | fprintf(stderr, "Unknown flags\n");
|
621 | 4b640365 | Jan Kiszka | return -EINVAL;
|
622 | 4b640365 | Jan Kiszka | } |
623 | 4b640365 | Jan Kiszka | if (qemu_file_has_error(f)) {
|
624 | 4b640365 | Jan Kiszka | return -EIO;
|
625 | c163b5ca | lirans@il.ibm.com | } |
626 | a55eb92c | Jan Kiszka | } while (!(flags & BLK_MIG_FLAG_EOS));
|
627 | a55eb92c | Jan Kiszka | |
628 | c163b5ca | lirans@il.ibm.com | return 0; |
629 | c163b5ca | lirans@il.ibm.com | } |
630 | c163b5ca | lirans@il.ibm.com | |
631 | c163b5ca | lirans@il.ibm.com | static void block_set_params(int blk_enable, int shared_base, void *opaque) |
632 | c163b5ca | lirans@il.ibm.com | { |
633 | d11ecd3d | Jan Kiszka | block_mig_state.blk_enable = blk_enable; |
634 | d11ecd3d | Jan Kiszka | block_mig_state.shared_base = shared_base; |
635 | a55eb92c | Jan Kiszka | |
636 | c163b5ca | lirans@il.ibm.com | /* shared base means that blk_enable = 1 */
|
637 | d11ecd3d | Jan Kiszka | block_mig_state.blk_enable |= shared_base; |
638 | c163b5ca | lirans@il.ibm.com | } |
639 | c163b5ca | lirans@il.ibm.com | |
640 | c163b5ca | lirans@il.ibm.com | void blk_mig_init(void) |
641 | a55eb92c | Jan Kiszka | { |
642 | 5e5328be | Jan Kiszka | QSIMPLEQ_INIT(&block_mig_state.bmds_list); |
643 | 5e5328be | Jan Kiszka | QSIMPLEQ_INIT(&block_mig_state.blk_list); |
644 | 5e5328be | Jan Kiszka | |
645 | 0be71e32 | Alex Williamson | register_savevm_live(NULL, "block", 0, 1, block_set_params, |
646 | 0be71e32 | Alex Williamson | block_save_live, NULL, block_load, &block_mig_state);
|
647 | c163b5ca | lirans@il.ibm.com | } |