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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 | 33656af7 | Marcelo Tosatti | unsigned long *aio_bitmap; |
53 | a55eb92c | Jan Kiszka | } BlkMigDevState; |
54 | a55eb92c | Jan Kiszka | |
55 | c163b5ca | lirans@il.ibm.com | typedef struct BlkMigBlock { |
56 | c163b5ca | lirans@il.ibm.com | uint8_t *buf; |
57 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
58 | c163b5ca | lirans@il.ibm.com | int64_t sector; |
59 | 33656af7 | Marcelo Tosatti | int nr_sectors;
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60 | c163b5ca | lirans@il.ibm.com | struct iovec iov;
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61 | c163b5ca | lirans@il.ibm.com | QEMUIOVector qiov; |
62 | c163b5ca | lirans@il.ibm.com | BlockDriverAIOCB *aiocb; |
63 | c163b5ca | lirans@il.ibm.com | int ret;
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64 | 889ae39c | Liran Schour | int64_t time; |
65 | 5e5328be | Jan Kiszka | QSIMPLEQ_ENTRY(BlkMigBlock) entry; |
66 | c163b5ca | lirans@il.ibm.com | } BlkMigBlock; |
67 | c163b5ca | lirans@il.ibm.com | |
68 | c163b5ca | lirans@il.ibm.com | typedef struct BlkMigState { |
69 | c163b5ca | lirans@il.ibm.com | int blk_enable;
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70 | c163b5ca | lirans@il.ibm.com | int shared_base;
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71 | 5e5328be | Jan Kiszka | QSIMPLEQ_HEAD(bmds_list, BlkMigDevState) bmds_list; |
72 | 5e5328be | Jan Kiszka | QSIMPLEQ_HEAD(blk_list, BlkMigBlock) blk_list; |
73 | c163b5ca | lirans@il.ibm.com | int submitted;
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74 | c163b5ca | lirans@il.ibm.com | int read_done;
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75 | c163b5ca | lirans@il.ibm.com | int transferred;
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76 | 82801d8f | Jan Kiszka | int64_t total_sector_sum; |
77 | 01e61e2d | Jan Kiszka | int prev_progress;
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78 | e970ec0b | Liran Schour | int bulk_completed;
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79 | 889ae39c | Liran Schour | long double total_time; |
80 | 889ae39c | Liran Schour | int reads;
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81 | c163b5ca | lirans@il.ibm.com | } BlkMigState; |
82 | c163b5ca | lirans@il.ibm.com | |
83 | d11ecd3d | Jan Kiszka | static BlkMigState block_mig_state;
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84 | c163b5ca | lirans@il.ibm.com | |
85 | 13f0b67f | Jan Kiszka | static void blk_send(QEMUFile *f, BlkMigBlock * blk) |
86 | 13f0b67f | Jan Kiszka | { |
87 | 13f0b67f | Jan Kiszka | int len;
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88 | 13f0b67f | Jan Kiszka | |
89 | 13f0b67f | Jan Kiszka | /* sector number and flags */
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90 | 13f0b67f | Jan Kiszka | qemu_put_be64(f, (blk->sector << BDRV_SECTOR_BITS) |
91 | 13f0b67f | Jan Kiszka | | BLK_MIG_FLAG_DEVICE_BLOCK); |
92 | 13f0b67f | Jan Kiszka | |
93 | 13f0b67f | Jan Kiszka | /* device name */
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94 | 13f0b67f | Jan Kiszka | len = strlen(blk->bmds->bs->device_name); |
95 | 13f0b67f | Jan Kiszka | qemu_put_byte(f, len); |
96 | 13f0b67f | Jan Kiszka | qemu_put_buffer(f, (uint8_t *)blk->bmds->bs->device_name, len); |
97 | 13f0b67f | Jan Kiszka | |
98 | 13f0b67f | Jan Kiszka | qemu_put_buffer(f, blk->buf, BLOCK_SIZE); |
99 | 13f0b67f | Jan Kiszka | } |
100 | 13f0b67f | Jan Kiszka | |
101 | 25f23643 | Jan Kiszka | int blk_mig_active(void) |
102 | 25f23643 | Jan Kiszka | { |
103 | 25f23643 | Jan Kiszka | return !QSIMPLEQ_EMPTY(&block_mig_state.bmds_list);
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104 | 25f23643 | Jan Kiszka | } |
105 | 25f23643 | Jan Kiszka | |
106 | 25f23643 | Jan Kiszka | uint64_t blk_mig_bytes_transferred(void)
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107 | 25f23643 | Jan Kiszka | { |
108 | 25f23643 | Jan Kiszka | BlkMigDevState *bmds; |
109 | 25f23643 | Jan Kiszka | uint64_t sum = 0;
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110 | 25f23643 | Jan Kiszka | |
111 | 25f23643 | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
112 | 25f23643 | Jan Kiszka | sum += bmds->completed_sectors; |
113 | 25f23643 | Jan Kiszka | } |
114 | 25f23643 | Jan Kiszka | return sum << BDRV_SECTOR_BITS;
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115 | 25f23643 | Jan Kiszka | } |
116 | 25f23643 | Jan Kiszka | |
117 | 25f23643 | Jan Kiszka | uint64_t blk_mig_bytes_remaining(void)
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118 | 25f23643 | Jan Kiszka | { |
119 | 25f23643 | Jan Kiszka | return blk_mig_bytes_total() - blk_mig_bytes_transferred();
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120 | 25f23643 | Jan Kiszka | } |
121 | 25f23643 | Jan Kiszka | |
122 | 25f23643 | Jan Kiszka | uint64_t blk_mig_bytes_total(void)
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123 | 25f23643 | Jan Kiszka | { |
124 | 25f23643 | Jan Kiszka | BlkMigDevState *bmds; |
125 | 25f23643 | Jan Kiszka | uint64_t sum = 0;
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126 | 25f23643 | Jan Kiszka | |
127 | 25f23643 | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
128 | 25f23643 | Jan Kiszka | sum += bmds->total_sectors; |
129 | 25f23643 | Jan Kiszka | } |
130 | 25f23643 | Jan Kiszka | return sum << BDRV_SECTOR_BITS;
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131 | 25f23643 | Jan Kiszka | } |
132 | 25f23643 | Jan Kiszka | |
133 | 889ae39c | Liran Schour | static inline void add_avg_read_time(int64_t time) |
134 | 889ae39c | Liran Schour | { |
135 | 889ae39c | Liran Schour | block_mig_state.reads++; |
136 | 889ae39c | Liran Schour | block_mig_state.total_time += time; |
137 | 889ae39c | Liran Schour | } |
138 | 889ae39c | Liran Schour | |
139 | 889ae39c | Liran Schour | static inline long double compute_read_bwidth(void) |
140 | 889ae39c | Liran Schour | { |
141 | 889ae39c | Liran Schour | assert(block_mig_state.total_time != 0);
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142 | 889ae39c | Liran Schour | return (block_mig_state.reads * BLOCK_SIZE)/ block_mig_state.total_time;
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143 | 889ae39c | Liran Schour | } |
144 | 889ae39c | Liran Schour | |
145 | 33656af7 | Marcelo Tosatti | static int bmds_aio_inflight(BlkMigDevState *bmds, int64_t sector) |
146 | 33656af7 | Marcelo Tosatti | { |
147 | 33656af7 | Marcelo Tosatti | int64_t chunk = sector / (int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK; |
148 | 33656af7 | Marcelo Tosatti | |
149 | 33656af7 | Marcelo Tosatti | if (bmds->aio_bitmap &&
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150 | 33656af7 | Marcelo Tosatti | (sector << BDRV_SECTOR_BITS) < bdrv_getlength(bmds->bs)) { |
151 | 33656af7 | Marcelo Tosatti | return !!(bmds->aio_bitmap[chunk / (sizeof(unsigned long) * 8)] & |
152 | 33656af7 | Marcelo Tosatti | (1UL << (chunk % (sizeof(unsigned long) * 8)))); |
153 | 33656af7 | Marcelo Tosatti | } else {
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154 | 33656af7 | Marcelo Tosatti | return 0; |
155 | 33656af7 | Marcelo Tosatti | } |
156 | 33656af7 | Marcelo Tosatti | } |
157 | 33656af7 | Marcelo Tosatti | |
158 | 33656af7 | Marcelo Tosatti | static void bmds_set_aio_inflight(BlkMigDevState *bmds, int64_t sector_num, |
159 | 33656af7 | Marcelo Tosatti | int nb_sectors, int set) |
160 | 33656af7 | Marcelo Tosatti | { |
161 | 33656af7 | Marcelo Tosatti | int64_t start, end; |
162 | 33656af7 | Marcelo Tosatti | unsigned long val, idx, bit; |
163 | 33656af7 | Marcelo Tosatti | |
164 | 33656af7 | Marcelo Tosatti | start = sector_num / BDRV_SECTORS_PER_DIRTY_CHUNK; |
165 | 33656af7 | Marcelo Tosatti | end = (sector_num + nb_sectors - 1) / BDRV_SECTORS_PER_DIRTY_CHUNK;
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166 | 33656af7 | Marcelo Tosatti | |
167 | 33656af7 | Marcelo Tosatti | for (; start <= end; start++) {
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168 | 33656af7 | Marcelo Tosatti | idx = start / (sizeof(unsigned long) * 8); |
169 | 33656af7 | Marcelo Tosatti | bit = start % (sizeof(unsigned long) * 8); |
170 | 33656af7 | Marcelo Tosatti | val = bmds->aio_bitmap[idx]; |
171 | 33656af7 | Marcelo Tosatti | if (set) {
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172 | 33656af7 | Marcelo Tosatti | if (!(val & (1UL << bit))) { |
173 | 33656af7 | Marcelo Tosatti | val |= 1UL << bit;
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174 | 33656af7 | Marcelo Tosatti | } |
175 | 33656af7 | Marcelo Tosatti | } else {
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176 | 33656af7 | Marcelo Tosatti | if (val & (1UL << bit)) { |
177 | 33656af7 | Marcelo Tosatti | val &= ~(1UL << bit);
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178 | 33656af7 | Marcelo Tosatti | } |
179 | 33656af7 | Marcelo Tosatti | } |
180 | 33656af7 | Marcelo Tosatti | bmds->aio_bitmap[idx] = val; |
181 | 33656af7 | Marcelo Tosatti | } |
182 | 33656af7 | Marcelo Tosatti | } |
183 | 33656af7 | Marcelo Tosatti | |
184 | 33656af7 | Marcelo Tosatti | static void alloc_aio_bitmap(BlkMigDevState *bmds) |
185 | 33656af7 | Marcelo Tosatti | { |
186 | 33656af7 | Marcelo Tosatti | BlockDriverState *bs = bmds->bs; |
187 | 33656af7 | Marcelo Tosatti | int64_t bitmap_size; |
188 | 33656af7 | Marcelo Tosatti | |
189 | 33656af7 | Marcelo Tosatti | bitmap_size = (bdrv_getlength(bs) >> BDRV_SECTOR_BITS) + |
190 | 33656af7 | Marcelo Tosatti | BDRV_SECTORS_PER_DIRTY_CHUNK * 8 - 1; |
191 | 33656af7 | Marcelo Tosatti | bitmap_size /= BDRV_SECTORS_PER_DIRTY_CHUNK * 8;
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192 | 33656af7 | Marcelo Tosatti | |
193 | 33656af7 | Marcelo Tosatti | bmds->aio_bitmap = qemu_mallocz(bitmap_size); |
194 | 33656af7 | Marcelo Tosatti | } |
195 | 33656af7 | Marcelo Tosatti | |
196 | c163b5ca | lirans@il.ibm.com | static void blk_mig_read_cb(void *opaque, int ret) |
197 | c163b5ca | lirans@il.ibm.com | { |
198 | c163b5ca | lirans@il.ibm.com | BlkMigBlock *blk = opaque; |
199 | a55eb92c | Jan Kiszka | |
200 | c163b5ca | lirans@il.ibm.com | blk->ret = ret; |
201 | a55eb92c | Jan Kiszka | |
202 | 889ae39c | Liran Schour | blk->time = qemu_get_clock_ns(rt_clock) - blk->time; |
203 | 889ae39c | Liran Schour | |
204 | 889ae39c | Liran Schour | add_avg_read_time(blk->time); |
205 | 889ae39c | Liran Schour | |
206 | 5e5328be | Jan Kiszka | QSIMPLEQ_INSERT_TAIL(&block_mig_state.blk_list, blk, entry); |
207 | 33656af7 | Marcelo Tosatti | bmds_set_aio_inflight(blk->bmds, blk->sector, blk->nr_sectors, 0);
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208 | a55eb92c | Jan Kiszka | |
209 | d11ecd3d | Jan Kiszka | block_mig_state.submitted--; |
210 | d11ecd3d | Jan Kiszka | block_mig_state.read_done++; |
211 | d11ecd3d | Jan Kiszka | assert(block_mig_state.submitted >= 0);
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212 | c163b5ca | lirans@il.ibm.com | } |
213 | c163b5ca | lirans@il.ibm.com | |
214 | 7184049e | Jan Kiszka | static int mig_save_device_bulk(Monitor *mon, QEMUFile *f, |
215 | e970ec0b | Liran Schour | BlkMigDevState *bmds) |
216 | a55eb92c | Jan Kiszka | { |
217 | 57cce12d | Jan Kiszka | int64_t total_sectors = bmds->total_sectors; |
218 | 57cce12d | Jan Kiszka | int64_t cur_sector = bmds->cur_sector; |
219 | 57cce12d | Jan Kiszka | BlockDriverState *bs = bmds->bs; |
220 | c163b5ca | lirans@il.ibm.com | BlkMigBlock *blk; |
221 | 13f0b67f | Jan Kiszka | int nr_sectors;
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222 | a55eb92c | Jan Kiszka | |
223 | 57cce12d | Jan Kiszka | if (bmds->shared_base) {
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224 | b1d10856 | Jan Kiszka | while (cur_sector < total_sectors &&
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225 | 57cce12d | Jan Kiszka | !bdrv_is_allocated(bs, cur_sector, MAX_IS_ALLOCATED_SEARCH, |
226 | 57cce12d | Jan Kiszka | &nr_sectors)) { |
227 | c163b5ca | lirans@il.ibm.com | cur_sector += nr_sectors; |
228 | c163b5ca | lirans@il.ibm.com | } |
229 | c163b5ca | lirans@il.ibm.com | } |
230 | a55eb92c | Jan Kiszka | |
231 | a55eb92c | Jan Kiszka | if (cur_sector >= total_sectors) {
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232 | 82801d8f | Jan Kiszka | bmds->cur_sector = bmds->completed_sectors = total_sectors; |
233 | c163b5ca | lirans@il.ibm.com | return 1; |
234 | c163b5ca | lirans@il.ibm.com | } |
235 | a55eb92c | Jan Kiszka | |
236 | 82801d8f | Jan Kiszka | bmds->completed_sectors = cur_sector; |
237 | a55eb92c | Jan Kiszka | |
238 | 57cce12d | Jan Kiszka | cur_sector &= ~((int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK - 1);
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239 | 57cce12d | Jan Kiszka | |
240 | 6ea44308 | Jan Kiszka | /* we are going to transfer a full block even if it is not allocated */
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241 | 6ea44308 | Jan Kiszka | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; |
242 | c163b5ca | lirans@il.ibm.com | |
243 | 6ea44308 | Jan Kiszka | if (total_sectors - cur_sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {
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244 | 57cce12d | Jan Kiszka | nr_sectors = total_sectors - cur_sector; |
245 | c163b5ca | lirans@il.ibm.com | } |
246 | a55eb92c | Jan Kiszka | |
247 | 13f0b67f | Jan Kiszka | blk = qemu_malloc(sizeof(BlkMigBlock));
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248 | 13f0b67f | Jan Kiszka | blk->buf = qemu_malloc(BLOCK_SIZE); |
249 | 13f0b67f | Jan Kiszka | blk->bmds = bmds; |
250 | 13f0b67f | Jan Kiszka | blk->sector = cur_sector; |
251 | 33656af7 | Marcelo Tosatti | blk->nr_sectors = nr_sectors; |
252 | a55eb92c | Jan Kiszka | |
253 | e970ec0b | Liran Schour | blk->iov.iov_base = blk->buf; |
254 | e970ec0b | Liran Schour | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; |
255 | e970ec0b | Liran Schour | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1);
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256 | a55eb92c | Jan Kiszka | |
257 | 889ae39c | Liran Schour | blk->time = qemu_get_clock_ns(rt_clock); |
258 | 889ae39c | Liran Schour | |
259 | e970ec0b | Liran Schour | blk->aiocb = bdrv_aio_readv(bs, cur_sector, &blk->qiov, |
260 | e970ec0b | Liran Schour | nr_sectors, blk_mig_read_cb, blk); |
261 | e970ec0b | Liran Schour | if (!blk->aiocb) {
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262 | e970ec0b | Liran Schour | goto error;
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263 | c163b5ca | lirans@il.ibm.com | } |
264 | e970ec0b | Liran Schour | block_mig_state.submitted++; |
265 | d76cac7d | Liran Schour | |
266 | 13f0b67f | Jan Kiszka | bdrv_reset_dirty(bs, cur_sector, nr_sectors); |
267 | 13f0b67f | Jan Kiszka | bmds->cur_sector = cur_sector + nr_sectors; |
268 | a55eb92c | Jan Kiszka | |
269 | 13f0b67f | Jan Kiszka | return (bmds->cur_sector >= total_sectors);
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270 | 4b640365 | Jan Kiszka | |
271 | 4b640365 | Jan Kiszka | error:
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272 | 7184049e | Jan Kiszka | monitor_printf(mon, "Error reading sector %" PRId64 "\n", cur_sector); |
273 | 4b640365 | Jan Kiszka | qemu_file_set_error(f); |
274 | 4b640365 | Jan Kiszka | qemu_free(blk->buf); |
275 | 4b640365 | Jan Kiszka | qemu_free(blk); |
276 | 4b640365 | Jan Kiszka | return 0; |
277 | c163b5ca | lirans@il.ibm.com | } |
278 | c163b5ca | lirans@il.ibm.com | |
279 | c163b5ca | lirans@il.ibm.com | static void set_dirty_tracking(int enable) |
280 | c163b5ca | lirans@il.ibm.com | { |
281 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
282 | 5e5328be | Jan Kiszka | |
283 | 5e5328be | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
284 | a55eb92c | Jan Kiszka | bdrv_set_dirty_tracking(bmds->bs, enable); |
285 | c163b5ca | lirans@il.ibm.com | } |
286 | c163b5ca | lirans@il.ibm.com | } |
287 | c163b5ca | lirans@il.ibm.com | |
288 | b66460e4 | Stefan Hajnoczi | static void init_blk_migration_it(void *opaque, BlockDriverState *bs) |
289 | c163b5ca | lirans@il.ibm.com | { |
290 | b66460e4 | Stefan Hajnoczi | Monitor *mon = opaque; |
291 | 5e5328be | Jan Kiszka | BlkMigDevState *bmds; |
292 | 792773b2 | Jan Kiszka | int64_t sectors; |
293 | a55eb92c | Jan Kiszka | |
294 | d246673d | Markus Armbruster | if (!bdrv_is_read_only(bs)) {
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295 | b66460e4 | Stefan Hajnoczi | sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
296 | 31f54f24 | Shahar Havivi | if (sectors <= 0) { |
297 | b66460e4 | Stefan Hajnoczi | return;
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298 | b66460e4 | Stefan Hajnoczi | } |
299 | b66460e4 | Stefan Hajnoczi | |
300 | b66460e4 | Stefan Hajnoczi | bmds = qemu_mallocz(sizeof(BlkMigDevState));
|
301 | b66460e4 | Stefan Hajnoczi | bmds->bs = bs; |
302 | b66460e4 | Stefan Hajnoczi | bmds->bulk_completed = 0;
|
303 | b66460e4 | Stefan Hajnoczi | bmds->total_sectors = sectors; |
304 | b66460e4 | Stefan Hajnoczi | bmds->completed_sectors = 0;
|
305 | b66460e4 | Stefan Hajnoczi | bmds->shared_base = block_mig_state.shared_base; |
306 | 33656af7 | Marcelo Tosatti | alloc_aio_bitmap(bmds); |
307 | b66460e4 | Stefan Hajnoczi | |
308 | b66460e4 | Stefan Hajnoczi | block_mig_state.total_sector_sum += sectors; |
309 | b66460e4 | Stefan Hajnoczi | |
310 | b66460e4 | Stefan Hajnoczi | if (bmds->shared_base) {
|
311 | b66460e4 | Stefan Hajnoczi | monitor_printf(mon, "Start migration for %s with shared base "
|
312 | b66460e4 | Stefan Hajnoczi | "image\n",
|
313 | b66460e4 | Stefan Hajnoczi | bs->device_name); |
314 | b66460e4 | Stefan Hajnoczi | } else {
|
315 | b66460e4 | Stefan Hajnoczi | monitor_printf(mon, "Start full migration for %s\n",
|
316 | b66460e4 | Stefan Hajnoczi | bs->device_name); |
317 | b66460e4 | Stefan Hajnoczi | } |
318 | b66460e4 | Stefan Hajnoczi | |
319 | b66460e4 | Stefan Hajnoczi | QSIMPLEQ_INSERT_TAIL(&block_mig_state.bmds_list, bmds, entry); |
320 | b66460e4 | Stefan Hajnoczi | } |
321 | b66460e4 | Stefan Hajnoczi | } |
322 | b66460e4 | Stefan Hajnoczi | |
323 | b66460e4 | Stefan Hajnoczi | static void init_blk_migration(Monitor *mon, QEMUFile *f) |
324 | b66460e4 | Stefan Hajnoczi | { |
325 | 69d63a97 | Jan Kiszka | block_mig_state.submitted = 0;
|
326 | 69d63a97 | Jan Kiszka | block_mig_state.read_done = 0;
|
327 | 69d63a97 | Jan Kiszka | block_mig_state.transferred = 0;
|
328 | 82801d8f | Jan Kiszka | block_mig_state.total_sector_sum = 0;
|
329 | 01e61e2d | Jan Kiszka | block_mig_state.prev_progress = -1;
|
330 | e970ec0b | Liran Schour | block_mig_state.bulk_completed = 0;
|
331 | 889ae39c | Liran Schour | block_mig_state.total_time = 0;
|
332 | 889ae39c | Liran Schour | block_mig_state.reads = 0;
|
333 | 69d63a97 | Jan Kiszka | |
334 | b66460e4 | Stefan Hajnoczi | bdrv_iterate(init_blk_migration_it, mon); |
335 | c163b5ca | lirans@il.ibm.com | } |
336 | c163b5ca | lirans@il.ibm.com | |
337 | e970ec0b | Liran Schour | static int blk_mig_save_bulked_block(Monitor *mon, QEMUFile *f) |
338 | c163b5ca | lirans@il.ibm.com | { |
339 | 82801d8f | Jan Kiszka | int64_t completed_sector_sum = 0;
|
340 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
341 | 01e61e2d | Jan Kiszka | int progress;
|
342 | 82801d8f | Jan Kiszka | int ret = 0; |
343 | c163b5ca | lirans@il.ibm.com | |
344 | 5e5328be | Jan Kiszka | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
345 | a55eb92c | Jan Kiszka | if (bmds->bulk_completed == 0) { |
346 | e970ec0b | Liran Schour | if (mig_save_device_bulk(mon, f, bmds) == 1) { |
347 | 57cce12d | Jan Kiszka | /* completed bulk section for this device */
|
348 | 57cce12d | Jan Kiszka | bmds->bulk_completed = 1;
|
349 | c163b5ca | lirans@il.ibm.com | } |
350 | 82801d8f | Jan Kiszka | completed_sector_sum += bmds->completed_sectors; |
351 | 82801d8f | Jan Kiszka | ret = 1;
|
352 | 82801d8f | Jan Kiszka | break;
|
353 | 82801d8f | Jan Kiszka | } else {
|
354 | 82801d8f | Jan Kiszka | completed_sector_sum += bmds->completed_sectors; |
355 | c163b5ca | lirans@il.ibm.com | } |
356 | c163b5ca | lirans@il.ibm.com | } |
357 | a55eb92c | Jan Kiszka | |
358 | 01e61e2d | Jan Kiszka | progress = completed_sector_sum * 100 / block_mig_state.total_sector_sum;
|
359 | 01e61e2d | Jan Kiszka | if (progress != block_mig_state.prev_progress) {
|
360 | 01e61e2d | Jan Kiszka | block_mig_state.prev_progress = progress; |
361 | 01e61e2d | Jan Kiszka | qemu_put_be64(f, (progress << BDRV_SECTOR_BITS) |
362 | 01e61e2d | Jan Kiszka | | BLK_MIG_FLAG_PROGRESS); |
363 | 01e61e2d | Jan Kiszka | monitor_printf(mon, "Completed %d %%\r", progress);
|
364 | 7184049e | Jan Kiszka | monitor_flush(mon); |
365 | 82801d8f | Jan Kiszka | } |
366 | 82801d8f | Jan Kiszka | |
367 | 82801d8f | Jan Kiszka | return ret;
|
368 | c163b5ca | lirans@il.ibm.com | } |
369 | c163b5ca | lirans@il.ibm.com | |
370 | d76cac7d | Liran Schour | static void blk_mig_reset_dirty_cursor(void) |
371 | c163b5ca | lirans@il.ibm.com | { |
372 | c163b5ca | lirans@il.ibm.com | BlkMigDevState *bmds; |
373 | d76cac7d | Liran Schour | |
374 | d76cac7d | Liran Schour | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
375 | d76cac7d | Liran Schour | bmds->cur_dirty = 0;
|
376 | d76cac7d | Liran Schour | } |
377 | d76cac7d | Liran Schour | } |
378 | d76cac7d | Liran Schour | |
379 | d76cac7d | Liran Schour | static int mig_save_device_dirty(Monitor *mon, QEMUFile *f, |
380 | d76cac7d | Liran Schour | BlkMigDevState *bmds, int is_async)
|
381 | d76cac7d | Liran Schour | { |
382 | d76cac7d | Liran Schour | BlkMigBlock *blk; |
383 | d76cac7d | Liran Schour | int64_t total_sectors = bmds->total_sectors; |
384 | c163b5ca | lirans@il.ibm.com | int64_t sector; |
385 | d76cac7d | Liran Schour | int nr_sectors;
|
386 | a55eb92c | Jan Kiszka | |
387 | d76cac7d | Liran Schour | for (sector = bmds->cur_dirty; sector < bmds->total_sectors;) {
|
388 | 33656af7 | Marcelo Tosatti | if (bmds_aio_inflight(bmds, sector))
|
389 | 33656af7 | Marcelo Tosatti | qemu_aio_flush(); |
390 | d76cac7d | Liran Schour | if (bdrv_get_dirty(bmds->bs, sector)) {
|
391 | 575a58d7 | Jan Kiszka | |
392 | d76cac7d | Liran Schour | if (total_sectors - sector < BDRV_SECTORS_PER_DIRTY_CHUNK) {
|
393 | d76cac7d | Liran Schour | nr_sectors = total_sectors - sector; |
394 | d76cac7d | Liran Schour | } else {
|
395 | d76cac7d | Liran Schour | nr_sectors = BDRV_SECTORS_PER_DIRTY_CHUNK; |
396 | d76cac7d | Liran Schour | } |
397 | d76cac7d | Liran Schour | blk = qemu_malloc(sizeof(BlkMigBlock));
|
398 | d76cac7d | Liran Schour | blk->buf = qemu_malloc(BLOCK_SIZE); |
399 | d76cac7d | Liran Schour | blk->bmds = bmds; |
400 | d76cac7d | Liran Schour | blk->sector = sector; |
401 | 33656af7 | Marcelo Tosatti | blk->nr_sectors = nr_sectors; |
402 | d76cac7d | Liran Schour | |
403 | 889ae39c | Liran Schour | if (is_async) {
|
404 | d76cac7d | Liran Schour | blk->iov.iov_base = blk->buf; |
405 | d76cac7d | Liran Schour | blk->iov.iov_len = nr_sectors * BDRV_SECTOR_SIZE; |
406 | d76cac7d | Liran Schour | qemu_iovec_init_external(&blk->qiov, &blk->iov, 1);
|
407 | d76cac7d | Liran Schour | |
408 | bd0858bb | Yoshiaki Tamura | blk->time = qemu_get_clock_ns(rt_clock); |
409 | 889ae39c | Liran Schour | |
410 | d76cac7d | Liran Schour | blk->aiocb = bdrv_aio_readv(bmds->bs, sector, &blk->qiov, |
411 | d76cac7d | Liran Schour | nr_sectors, blk_mig_read_cb, blk); |
412 | d76cac7d | Liran Schour | if (!blk->aiocb) {
|
413 | d76cac7d | Liran Schour | goto error;
|
414 | d76cac7d | Liran Schour | } |
415 | d76cac7d | Liran Schour | block_mig_state.submitted++; |
416 | 33656af7 | Marcelo Tosatti | bmds_set_aio_inflight(bmds, sector, nr_sectors, 1);
|
417 | d76cac7d | Liran Schour | } else {
|
418 | d76cac7d | Liran Schour | if (bdrv_read(bmds->bs, sector, blk->buf,
|
419 | d76cac7d | Liran Schour | nr_sectors) < 0) {
|
420 | d76cac7d | Liran Schour | goto error;
|
421 | c163b5ca | lirans@il.ibm.com | } |
422 | d76cac7d | Liran Schour | blk_send(f, blk); |
423 | a55eb92c | Jan Kiszka | |
424 | d76cac7d | Liran Schour | qemu_free(blk->buf); |
425 | d76cac7d | Liran Schour | qemu_free(blk); |
426 | a55eb92c | Jan Kiszka | } |
427 | d76cac7d | Liran Schour | |
428 | d76cac7d | Liran Schour | bdrv_reset_dirty(bmds->bs, sector, nr_sectors); |
429 | d76cac7d | Liran Schour | break;
|
430 | c163b5ca | lirans@il.ibm.com | } |
431 | d76cac7d | Liran Schour | sector += BDRV_SECTORS_PER_DIRTY_CHUNK; |
432 | d76cac7d | Liran Schour | bmds->cur_dirty = sector; |
433 | c163b5ca | lirans@il.ibm.com | } |
434 | 575a58d7 | Jan Kiszka | |
435 | d76cac7d | Liran Schour | return (bmds->cur_dirty >= bmds->total_sectors);
|
436 | d76cac7d | Liran Schour | |
437 | 889ae39c | Liran Schour | error:
|
438 | d76cac7d | Liran Schour | monitor_printf(mon, "Error reading sector %" PRId64 "\n", sector); |
439 | d76cac7d | Liran Schour | qemu_file_set_error(f); |
440 | d76cac7d | Liran Schour | qemu_free(blk->buf); |
441 | d76cac7d | Liran Schour | qemu_free(blk); |
442 | d76cac7d | Liran Schour | return 0; |
443 | d76cac7d | Liran Schour | } |
444 | d76cac7d | Liran Schour | |
445 | d76cac7d | Liran Schour | static int blk_mig_save_dirty_block(Monitor *mon, QEMUFile *f, int is_async) |
446 | d76cac7d | Liran Schour | { |
447 | d76cac7d | Liran Schour | BlkMigDevState *bmds; |
448 | d76cac7d | Liran Schour | int ret = 0; |
449 | d76cac7d | Liran Schour | |
450 | d76cac7d | Liran Schour | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
451 | 889ae39c | Liran Schour | if (mig_save_device_dirty(mon, f, bmds, is_async) == 0) { |
452 | d76cac7d | Liran Schour | ret = 1;
|
453 | d76cac7d | Liran Schour | break;
|
454 | d76cac7d | Liran Schour | } |
455 | d76cac7d | Liran Schour | } |
456 | d76cac7d | Liran Schour | |
457 | d76cac7d | Liran Schour | return ret;
|
458 | c163b5ca | lirans@il.ibm.com | } |
459 | c163b5ca | lirans@il.ibm.com | |
460 | c163b5ca | lirans@il.ibm.com | static void flush_blks(QEMUFile* f) |
461 | c163b5ca | lirans@il.ibm.com | { |
462 | 5e5328be | Jan Kiszka | BlkMigBlock *blk; |
463 | a55eb92c | Jan Kiszka | |
464 | d0f2c4c6 | malc | DPRINTF("%s Enter submitted %d read_done %d transferred %d\n",
|
465 | d11ecd3d | Jan Kiszka | __FUNCTION__, block_mig_state.submitted, block_mig_state.read_done, |
466 | d11ecd3d | Jan Kiszka | block_mig_state.transferred); |
467 | a55eb92c | Jan Kiszka | |
468 | 5e5328be | Jan Kiszka | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
469 | 5e5328be | Jan Kiszka | if (qemu_file_rate_limit(f)) {
|
470 | 5e5328be | Jan Kiszka | break;
|
471 | 5e5328be | Jan Kiszka | } |
472 | 4b640365 | Jan Kiszka | if (blk->ret < 0) { |
473 | 4b640365 | Jan Kiszka | qemu_file_set_error(f); |
474 | 4b640365 | Jan Kiszka | break;
|
475 | 4b640365 | Jan Kiszka | } |
476 | 13f0b67f | Jan Kiszka | blk_send(f, blk); |
477 | a55eb92c | Jan Kiszka | |
478 | 5e5328be | Jan Kiszka | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
479 | c163b5ca | lirans@il.ibm.com | qemu_free(blk->buf); |
480 | c163b5ca | lirans@il.ibm.com | qemu_free(blk); |
481 | a55eb92c | Jan Kiszka | |
482 | d11ecd3d | Jan Kiszka | block_mig_state.read_done--; |
483 | d11ecd3d | Jan Kiszka | block_mig_state.transferred++; |
484 | d11ecd3d | Jan Kiszka | assert(block_mig_state.read_done >= 0);
|
485 | c163b5ca | lirans@il.ibm.com | } |
486 | c163b5ca | lirans@il.ibm.com | |
487 | d0f2c4c6 | malc | DPRINTF("%s Exit submitted %d read_done %d transferred %d\n", __FUNCTION__,
|
488 | d11ecd3d | Jan Kiszka | block_mig_state.submitted, block_mig_state.read_done, |
489 | d11ecd3d | Jan Kiszka | block_mig_state.transferred); |
490 | c163b5ca | lirans@il.ibm.com | } |
491 | c163b5ca | lirans@il.ibm.com | |
492 | 889ae39c | Liran Schour | static int64_t get_remaining_dirty(void) |
493 | 889ae39c | Liran Schour | { |
494 | 889ae39c | Liran Schour | BlkMigDevState *bmds; |
495 | 889ae39c | Liran Schour | int64_t dirty = 0;
|
496 | 889ae39c | Liran Schour | |
497 | 889ae39c | Liran Schour | QSIMPLEQ_FOREACH(bmds, &block_mig_state.bmds_list, entry) { |
498 | 889ae39c | Liran Schour | dirty += bdrv_get_dirty_count(bmds->bs); |
499 | 889ae39c | Liran Schour | } |
500 | 889ae39c | Liran Schour | |
501 | 889ae39c | Liran Schour | return dirty * BLOCK_SIZE;
|
502 | 889ae39c | Liran Schour | } |
503 | 889ae39c | Liran Schour | |
504 | c163b5ca | lirans@il.ibm.com | static int is_stage2_completed(void) |
505 | c163b5ca | lirans@il.ibm.com | { |
506 | 889ae39c | Liran Schour | int64_t remaining_dirty; |
507 | 889ae39c | Liran Schour | long double bwidth; |
508 | 889ae39c | Liran Schour | |
509 | 889ae39c | Liran Schour | if (block_mig_state.bulk_completed == 1) { |
510 | 889ae39c | Liran Schour | |
511 | 889ae39c | Liran Schour | remaining_dirty = get_remaining_dirty(); |
512 | bd0858bb | Yoshiaki Tamura | if (remaining_dirty == 0) { |
513 | bd0858bb | Yoshiaki Tamura | return 1; |
514 | bd0858bb | Yoshiaki Tamura | } |
515 | 889ae39c | Liran Schour | |
516 | bd0858bb | Yoshiaki Tamura | bwidth = compute_read_bwidth(); |
517 | 889ae39c | Liran Schour | |
518 | bd0858bb | Yoshiaki Tamura | if ((remaining_dirty / bwidth) <=
|
519 | 889ae39c | Liran Schour | migrate_max_downtime()) { |
520 | 889ae39c | Liran Schour | /* finish stage2 because we think that we can finish remaing work
|
521 | 889ae39c | Liran Schour | below max_downtime */
|
522 | 889ae39c | Liran Schour | |
523 | 889ae39c | Liran Schour | return 1; |
524 | 889ae39c | Liran Schour | } |
525 | 889ae39c | Liran Schour | } |
526 | 889ae39c | Liran Schour | |
527 | 889ae39c | Liran Schour | return 0; |
528 | c163b5ca | lirans@il.ibm.com | } |
529 | c163b5ca | lirans@il.ibm.com | |
530 | 7184049e | Jan Kiszka | static void blk_mig_cleanup(Monitor *mon) |
531 | 4ec7fcc7 | Jan Kiszka | { |
532 | 82801d8f | Jan Kiszka | BlkMigDevState *bmds; |
533 | 82801d8f | Jan Kiszka | BlkMigBlock *blk; |
534 | 4ec7fcc7 | Jan Kiszka | |
535 | 82801d8f | Jan Kiszka | while ((bmds = QSIMPLEQ_FIRST(&block_mig_state.bmds_list)) != NULL) { |
536 | 82801d8f | Jan Kiszka | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.bmds_list, entry); |
537 | 33656af7 | Marcelo Tosatti | qemu_free(bmds->aio_bitmap); |
538 | 4ec7fcc7 | Jan Kiszka | qemu_free(bmds); |
539 | 4ec7fcc7 | Jan Kiszka | } |
540 | 4ec7fcc7 | Jan Kiszka | |
541 | 82801d8f | Jan Kiszka | while ((blk = QSIMPLEQ_FIRST(&block_mig_state.blk_list)) != NULL) { |
542 | 82801d8f | Jan Kiszka | QSIMPLEQ_REMOVE_HEAD(&block_mig_state.blk_list, entry); |
543 | 4ec7fcc7 | Jan Kiszka | qemu_free(blk->buf); |
544 | 4ec7fcc7 | Jan Kiszka | qemu_free(blk); |
545 | 4ec7fcc7 | Jan Kiszka | } |
546 | 4ec7fcc7 | Jan Kiszka | |
547 | 4ec7fcc7 | Jan Kiszka | set_dirty_tracking(0);
|
548 | 4ec7fcc7 | Jan Kiszka | |
549 | 7184049e | Jan Kiszka | monitor_printf(mon, "\n");
|
550 | 4ec7fcc7 | Jan Kiszka | } |
551 | 4ec7fcc7 | Jan Kiszka | |
552 | f327aa0c | Jan Kiszka | static int block_save_live(Monitor *mon, QEMUFile *f, int stage, void *opaque) |
553 | c163b5ca | lirans@il.ibm.com | { |
554 | d0f2c4c6 | malc | DPRINTF("Enter save live stage %d submitted %d transferred %d\n",
|
555 | d11ecd3d | Jan Kiszka | stage, block_mig_state.submitted, block_mig_state.transferred); |
556 | a55eb92c | Jan Kiszka | |
557 | 4ec7fcc7 | Jan Kiszka | if (stage < 0) { |
558 | 7184049e | Jan Kiszka | blk_mig_cleanup(mon); |
559 | 4ec7fcc7 | Jan Kiszka | return 0; |
560 | 4ec7fcc7 | Jan Kiszka | } |
561 | 4ec7fcc7 | Jan Kiszka | |
562 | d11ecd3d | Jan Kiszka | if (block_mig_state.blk_enable != 1) { |
563 | c163b5ca | lirans@il.ibm.com | /* no need to migrate storage */
|
564 | a55eb92c | Jan Kiszka | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
565 | c163b5ca | lirans@il.ibm.com | return 1; |
566 | c163b5ca | lirans@il.ibm.com | } |
567 | a55eb92c | Jan Kiszka | |
568 | a55eb92c | Jan Kiszka | if (stage == 1) { |
569 | 7184049e | Jan Kiszka | init_blk_migration(mon, f); |
570 | a55eb92c | Jan Kiszka | |
571 | c163b5ca | lirans@il.ibm.com | /* start track dirty blocks */
|
572 | c163b5ca | lirans@il.ibm.com | set_dirty_tracking(1);
|
573 | c163b5ca | lirans@il.ibm.com | } |
574 | c163b5ca | lirans@il.ibm.com | |
575 | c163b5ca | lirans@il.ibm.com | flush_blks(f); |
576 | a55eb92c | Jan Kiszka | |
577 | 4b640365 | Jan Kiszka | if (qemu_file_has_error(f)) {
|
578 | 7184049e | Jan Kiszka | blk_mig_cleanup(mon); |
579 | 4b640365 | Jan Kiszka | return 0; |
580 | 4b640365 | Jan Kiszka | } |
581 | 4b640365 | Jan Kiszka | |
582 | d76cac7d | Liran Schour | blk_mig_reset_dirty_cursor(); |
583 | d76cac7d | Liran Schour | |
584 | 889ae39c | Liran Schour | if (stage == 2) { |
585 | d76cac7d | Liran Schour | /* control the rate of transfer */
|
586 | d76cac7d | Liran Schour | while ((block_mig_state.submitted +
|
587 | d76cac7d | Liran Schour | block_mig_state.read_done) * BLOCK_SIZE < |
588 | d76cac7d | Liran Schour | qemu_file_get_rate_limit(f)) { |
589 | d76cac7d | Liran Schour | if (block_mig_state.bulk_completed == 0) { |
590 | d76cac7d | Liran Schour | /* first finish the bulk phase */
|
591 | d76cac7d | Liran Schour | if (blk_mig_save_bulked_block(mon, f) == 0) { |
592 | 889ae39c | Liran Schour | /* finished saving bulk on all devices */
|
593 | d76cac7d | Liran Schour | block_mig_state.bulk_completed = 1;
|
594 | d76cac7d | Liran Schour | } |
595 | d76cac7d | Liran Schour | } else {
|
596 | d76cac7d | Liran Schour | if (blk_mig_save_dirty_block(mon, f, 1) == 0) { |
597 | d76cac7d | Liran Schour | /* no more dirty blocks */
|
598 | d76cac7d | Liran Schour | break;
|
599 | d76cac7d | Liran Schour | } |
600 | d76cac7d | Liran Schour | } |
601 | a55eb92c | Jan Kiszka | } |
602 | a55eb92c | Jan Kiszka | |
603 | d76cac7d | Liran Schour | flush_blks(f); |
604 | a55eb92c | Jan Kiszka | |
605 | d76cac7d | Liran Schour | if (qemu_file_has_error(f)) {
|
606 | d76cac7d | Liran Schour | blk_mig_cleanup(mon); |
607 | d76cac7d | Liran Schour | return 0; |
608 | d76cac7d | Liran Schour | } |
609 | 4b640365 | Jan Kiszka | } |
610 | 4b640365 | Jan Kiszka | |
611 | a55eb92c | Jan Kiszka | if (stage == 3) { |
612 | 889ae39c | Liran Schour | /* we know for sure that save bulk is completed and
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613 | 889ae39c | Liran Schour | all async read completed */
|
614 | 889ae39c | Liran Schour | assert(block_mig_state.submitted == 0);
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615 | a55eb92c | Jan Kiszka | |
616 | 889ae39c | Liran Schour | while (blk_mig_save_dirty_block(mon, f, 0) != 0); |
617 | 7184049e | Jan Kiszka | blk_mig_cleanup(mon); |
618 | a55eb92c | Jan Kiszka | |
619 | 01e61e2d | Jan Kiszka | /* report completion */
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620 | 01e61e2d | Jan Kiszka | qemu_put_be64(f, (100 << BDRV_SECTOR_BITS) | BLK_MIG_FLAG_PROGRESS);
|
621 | 01e61e2d | Jan Kiszka | |
622 | 4b640365 | Jan Kiszka | if (qemu_file_has_error(f)) {
|
623 | 4b640365 | Jan Kiszka | return 0; |
624 | 4b640365 | Jan Kiszka | } |
625 | 4b640365 | Jan Kiszka | |
626 | 7184049e | Jan Kiszka | monitor_printf(mon, "Block migration completed\n");
|
627 | c163b5ca | lirans@il.ibm.com | } |
628 | a55eb92c | Jan Kiszka | |
629 | a55eb92c | Jan Kiszka | qemu_put_be64(f, BLK_MIG_FLAG_EOS); |
630 | a55eb92c | Jan Kiszka | |
631 | c163b5ca | lirans@il.ibm.com | return ((stage == 2) && is_stage2_completed()); |
632 | c163b5ca | lirans@il.ibm.com | } |
633 | c163b5ca | lirans@il.ibm.com | |
634 | c163b5ca | lirans@il.ibm.com | static int block_load(QEMUFile *f, void *opaque, int version_id) |
635 | c163b5ca | lirans@il.ibm.com | { |
636 | 01e61e2d | Jan Kiszka | static int banner_printed; |
637 | c163b5ca | lirans@il.ibm.com | int len, flags;
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638 | c163b5ca | lirans@il.ibm.com | char device_name[256]; |
639 | c163b5ca | lirans@il.ibm.com | int64_t addr; |
640 | c163b5ca | lirans@il.ibm.com | BlockDriverState *bs; |
641 | c163b5ca | lirans@il.ibm.com | uint8_t *buf; |
642 | a55eb92c | Jan Kiszka | |
643 | c163b5ca | lirans@il.ibm.com | do {
|
644 | c163b5ca | lirans@il.ibm.com | addr = qemu_get_be64(f); |
645 | a55eb92c | Jan Kiszka | |
646 | 6ea44308 | Jan Kiszka | flags = addr & ~BDRV_SECTOR_MASK; |
647 | 6ea44308 | Jan Kiszka | addr >>= BDRV_SECTOR_BITS; |
648 | a55eb92c | Jan Kiszka | |
649 | a55eb92c | Jan Kiszka | if (flags & BLK_MIG_FLAG_DEVICE_BLOCK) {
|
650 | b02bea3a | Yoshiaki Tamura | int ret;
|
651 | c163b5ca | lirans@il.ibm.com | /* get device name */
|
652 | c163b5ca | lirans@il.ibm.com | len = qemu_get_byte(f); |
653 | c163b5ca | lirans@il.ibm.com | qemu_get_buffer(f, (uint8_t *)device_name, len); |
654 | c163b5ca | lirans@il.ibm.com | device_name[len] = '\0';
|
655 | a55eb92c | Jan Kiszka | |
656 | c163b5ca | lirans@il.ibm.com | bs = bdrv_find(device_name); |
657 | 4b640365 | Jan Kiszka | if (!bs) {
|
658 | 4b640365 | Jan Kiszka | fprintf(stderr, "Error unknown block device %s\n",
|
659 | 4b640365 | Jan Kiszka | device_name); |
660 | 4b640365 | Jan Kiszka | return -EINVAL;
|
661 | 4b640365 | Jan Kiszka | } |
662 | a55eb92c | Jan Kiszka | |
663 | 575a58d7 | Jan Kiszka | buf = qemu_malloc(BLOCK_SIZE); |
664 | 575a58d7 | Jan Kiszka | |
665 | a55eb92c | Jan Kiszka | qemu_get_buffer(f, buf, BLOCK_SIZE); |
666 | b02bea3a | Yoshiaki Tamura | ret = bdrv_write(bs, addr, buf, BDRV_SECTORS_PER_DIRTY_CHUNK); |
667 | 575a58d7 | Jan Kiszka | |
668 | 575a58d7 | Jan Kiszka | qemu_free(buf); |
669 | b02bea3a | Yoshiaki Tamura | if (ret < 0) { |
670 | b02bea3a | Yoshiaki Tamura | return ret;
|
671 | b02bea3a | Yoshiaki Tamura | } |
672 | 01e61e2d | Jan Kiszka | } else if (flags & BLK_MIG_FLAG_PROGRESS) { |
673 | 01e61e2d | Jan Kiszka | if (!banner_printed) {
|
674 | 01e61e2d | Jan Kiszka | printf("Receiving block device images\n");
|
675 | 01e61e2d | Jan Kiszka | banner_printed = 1;
|
676 | 01e61e2d | Jan Kiszka | } |
677 | 01e61e2d | Jan Kiszka | printf("Completed %d %%%c", (int)addr, |
678 | 01e61e2d | Jan Kiszka | (addr == 100) ? '\n' : '\r'); |
679 | 01e61e2d | Jan Kiszka | fflush(stdout); |
680 | a55eb92c | Jan Kiszka | } else if (!(flags & BLK_MIG_FLAG_EOS)) { |
681 | 4b640365 | Jan Kiszka | fprintf(stderr, "Unknown flags\n");
|
682 | 4b640365 | Jan Kiszka | return -EINVAL;
|
683 | 4b640365 | Jan Kiszka | } |
684 | 4b640365 | Jan Kiszka | if (qemu_file_has_error(f)) {
|
685 | 4b640365 | Jan Kiszka | return -EIO;
|
686 | c163b5ca | lirans@il.ibm.com | } |
687 | a55eb92c | Jan Kiszka | } while (!(flags & BLK_MIG_FLAG_EOS));
|
688 | a55eb92c | Jan Kiszka | |
689 | c163b5ca | lirans@il.ibm.com | return 0; |
690 | c163b5ca | lirans@il.ibm.com | } |
691 | c163b5ca | lirans@il.ibm.com | |
692 | c163b5ca | lirans@il.ibm.com | static void block_set_params(int blk_enable, int shared_base, void *opaque) |
693 | c163b5ca | lirans@il.ibm.com | { |
694 | d11ecd3d | Jan Kiszka | block_mig_state.blk_enable = blk_enable; |
695 | d11ecd3d | Jan Kiszka | block_mig_state.shared_base = shared_base; |
696 | a55eb92c | Jan Kiszka | |
697 | c163b5ca | lirans@il.ibm.com | /* shared base means that blk_enable = 1 */
|
698 | d11ecd3d | Jan Kiszka | block_mig_state.blk_enable |= shared_base; |
699 | c163b5ca | lirans@il.ibm.com | } |
700 | c163b5ca | lirans@il.ibm.com | |
701 | c163b5ca | lirans@il.ibm.com | void blk_mig_init(void) |
702 | a55eb92c | Jan Kiszka | { |
703 | 5e5328be | Jan Kiszka | QSIMPLEQ_INIT(&block_mig_state.bmds_list); |
704 | 5e5328be | Jan Kiszka | QSIMPLEQ_INIT(&block_mig_state.blk_list); |
705 | 5e5328be | Jan Kiszka | |
706 | 0be71e32 | Alex Williamson | register_savevm_live(NULL, "block", 0, 1, block_set_params, |
707 | 0be71e32 | Alex Williamson | block_save_live, NULL, block_load, &block_mig_state);
|
708 | c163b5ca | lirans@il.ibm.com | } |