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Stop VM on ENOSPC error. (Gleb Natapov)
This version of the patch adds new option "werror" to -drive flag.
Possible values are:
report - report errors to a guest as IO errors
ignore - continue as if nothing happened
stop - stop VM on any error and retry last command on resume
enospc - stop vm on ENOSPC error and retry last command on resume
all other errors are reported to a guest.
Default is "report" to maintain current behaviour.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6388 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori
parent
7da03b1d26
commit
428c570512
83
hw/ide.c
83
hw/ide.c
@ -457,6 +457,8 @@ static inline int media_is_cd(IDEState *s)
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#define BM_STATUS_DMAING 0x01
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#define BM_STATUS_ERROR 0x02
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#define BM_STATUS_INT 0x04
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#define BM_STATUS_DMA_RETRY 0x08
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#define BM_STATUS_PIO_RETRY 0x10
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#define BM_CMD_START 0x01
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#define BM_CMD_READ 0x08
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@ -488,6 +490,8 @@ typedef struct BMDMAState {
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IDEState *ide_if;
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BlockDriverCompletionFunc *dma_cb;
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BlockDriverAIOCB *aiocb;
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int64_t sector_num;
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uint32_t nsector;
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} BMDMAState;
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typedef struct PCIIDEState {
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@ -498,6 +502,7 @@ typedef struct PCIIDEState {
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} PCIIDEState;
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static void ide_dma_start(IDEState *s, BlockDriverCompletionFunc *dma_cb);
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static void ide_dma_restart(IDEState *s);
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static void ide_atapi_cmd_read_dma_cb(void *opaque, int ret);
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static void padstr(char *str, const char *src, int len)
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@ -865,6 +870,28 @@ static void ide_dma_error(IDEState *s)
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ide_set_irq(s);
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}
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static int ide_handle_write_error(IDEState *s, int error, int op)
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{
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BlockInterfaceErrorAction action = drive_get_onerror(s->bs);
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if (action == BLOCK_ERR_IGNORE)
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return 0;
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if ((error == ENOSPC && action == BLOCK_ERR_STOP_ENOSPC)
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|| action == BLOCK_ERR_STOP_ANY) {
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s->bmdma->ide_if = s;
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s->bmdma->status |= op;
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vm_stop(0);
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} else {
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if (op == BM_STATUS_DMA_RETRY)
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ide_dma_error(s);
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else
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ide_rw_error(s);
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}
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return 1;
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}
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/* return 0 if buffer completed */
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static int dma_buf_rw(BMDMAState *bm, int is_write)
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{
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@ -990,9 +1017,10 @@ static void ide_sector_write(IDEState *s)
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if (n > s->req_nb_sectors)
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n = s->req_nb_sectors;
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ret = bdrv_write(s->bs, sector_num, s->io_buffer, n);
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if (ret != 0) {
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ide_rw_error(s);
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return;
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if (ide_handle_write_error(s, -ret, BM_STATUS_PIO_RETRY))
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return;
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}
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s->nsector -= n;
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@ -1024,6 +1052,20 @@ static void ide_sector_write(IDEState *s)
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}
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}
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static void ide_dma_restart_cb(void *opaque, int running)
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{
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BMDMAState *bm = opaque;
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if (!running)
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return;
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if (bm->status & BM_STATUS_DMA_RETRY) {
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bm->status &= ~BM_STATUS_DMA_RETRY;
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ide_dma_restart(bm->ide_if);
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} else if (bm->status & BM_STATUS_PIO_RETRY) {
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bm->status &= ~BM_STATUS_PIO_RETRY;
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ide_sector_write(bm->ide_if);
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}
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}
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static void ide_write_dma_cb(void *opaque, int ret)
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{
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BMDMAState *bm = opaque;
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@ -1032,8 +1074,8 @@ static void ide_write_dma_cb(void *opaque, int ret)
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int64_t sector_num;
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if (ret < 0) {
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ide_dma_error(s);
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return;
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if (ide_handle_write_error(s, -ret, BM_STATUS_DMA_RETRY))
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return;
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}
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n = s->io_buffer_size >> 9;
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@ -2849,11 +2891,25 @@ static void ide_dma_start(IDEState *s, BlockDriverCompletionFunc *dma_cb)
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bm->cur_prd_last = 0;
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bm->cur_prd_addr = 0;
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bm->cur_prd_len = 0;
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bm->sector_num = ide_get_sector(s);
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bm->nsector = s->nsector;
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if (bm->status & BM_STATUS_DMAING) {
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bm->dma_cb(bm, 0);
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}
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}
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static void ide_dma_restart(IDEState *s)
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{
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BMDMAState *bm = s->bmdma;
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ide_set_sector(s, bm->sector_num);
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s->io_buffer_index = 0;
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s->io_buffer_size = 0;
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s->nsector = bm->nsector;
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bm->cur_addr = bm->addr;
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bm->dma_cb = ide_write_dma_cb;
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ide_dma_start(s, bm->dma_cb);
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}
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static void ide_dma_cancel(BMDMAState *bm)
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{
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if (bm->status & BM_STATUS_DMAING) {
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@ -3043,6 +3099,7 @@ static void bmdma_map(PCIDevice *pci_dev, int region_num,
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d->ide_if[2 * i].bmdma = bm;
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d->ide_if[2 * i + 1].bmdma = bm;
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bm->pci_dev = (PCIIDEState *)pci_dev;
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qemu_add_vm_change_state_handler(ide_dma_restart_cb, bm);
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register_ioport_write(addr, 1, 1, bmdma_cmd_writeb, bm);
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@ -3068,9 +3125,14 @@ static void pci_ide_save(QEMUFile* f, void *opaque)
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for(i = 0; i < 2; i++) {
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BMDMAState *bm = &d->bmdma[i];
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uint8_t ifidx;
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qemu_put_8s(f, &bm->cmd);
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qemu_put_8s(f, &bm->status);
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qemu_put_be32s(f, &bm->addr);
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qemu_put_sbe64s(f, &bm->sector_num);
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qemu_put_be32s(f, &bm->nsector);
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ifidx = bm->ide_if ? bm->ide_if - d->ide_if : 0;
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qemu_put_8s(f, &ifidx);
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/* XXX: if a transfer is pending, we do not save it yet */
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}
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@ -3094,7 +3156,7 @@ static int pci_ide_load(QEMUFile* f, void *opaque, int version_id)
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PCIIDEState *d = opaque;
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int ret, i;
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if (version_id != 1)
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if (version_id != 2)
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return -EINVAL;
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ret = pci_device_load(&d->dev, f);
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if (ret < 0)
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@ -3102,9 +3164,14 @@ static int pci_ide_load(QEMUFile* f, void *opaque, int version_id)
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for(i = 0; i < 2; i++) {
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BMDMAState *bm = &d->bmdma[i];
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uint8_t ifidx;
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qemu_get_8s(f, &bm->cmd);
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qemu_get_8s(f, &bm->status);
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qemu_get_be32s(f, &bm->addr);
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qemu_get_sbe64s(f, &bm->sector_num);
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qemu_get_be32s(f, &bm->nsector);
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qemu_get_8s(f, &ifidx);
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bm->ide_if = &d->ide_if[ifidx];
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/* XXX: if a transfer is pending, we do not save it yet */
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}
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@ -3212,7 +3279,7 @@ void pci_cmd646_ide_init(PCIBus *bus, BlockDriverState **hd_table,
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ide_init2(&d->ide_if[0], hd_table[0], hd_table[1], irq[0]);
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ide_init2(&d->ide_if[2], hd_table[2], hd_table[3], irq[1]);
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register_savevm("ide", 0, 1, pci_ide_save, pci_ide_load, d);
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register_savevm("ide", 0, 2, pci_ide_save, pci_ide_load, d);
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qemu_register_reset(cmd646_reset, d);
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cmd646_reset(d);
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}
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@ -3269,7 +3336,7 @@ void pci_piix3_ide_init(PCIBus *bus, BlockDriverState **hd_table, int devfn,
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ide_init_ioport(&d->ide_if[0], 0x1f0, 0x3f6);
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ide_init_ioport(&d->ide_if[2], 0x170, 0x376);
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register_savevm("ide", 0, 1, pci_ide_save, pci_ide_load, d);
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register_savevm("ide", 0, 2, pci_ide_save, pci_ide_load, d);
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}
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/* hd_table must contain 4 block drivers */
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@ -3308,7 +3375,7 @@ void pci_piix4_ide_init(PCIBus *bus, BlockDriverState **hd_table, int devfn,
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ide_init_ioport(&d->ide_if[0], 0x1f0, 0x3f6);
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ide_init_ioport(&d->ide_if[2], 0x170, 0x376);
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register_savevm("ide", 0, 1, pci_ide_save, pci_ide_load, d);
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register_savevm("ide", 0, 2, pci_ide_save, pci_ide_load, d);
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}
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/***********************************************************/
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7
sysemu.h
7
sysemu.h
@ -128,11 +128,17 @@ typedef enum {
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IF_IDE, IF_SCSI, IF_FLOPPY, IF_PFLASH, IF_MTD, IF_SD, IF_VIRTIO
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} BlockInterfaceType;
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typedef enum {
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BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,
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BLOCK_ERR_STOP_ANY
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} BlockInterfaceErrorAction;
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typedef struct DriveInfo {
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BlockDriverState *bdrv;
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BlockInterfaceType type;
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int bus;
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int unit;
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BlockInterfaceErrorAction onerror;
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char serial[21];
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} DriveInfo;
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@ -146,6 +152,7 @@ extern DriveInfo drives_table[MAX_DRIVES+1];
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extern int drive_get_index(BlockInterfaceType type, int bus, int unit);
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extern int drive_get_max_bus(BlockInterfaceType type);
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extern const char *drive_get_serial(BlockDriverState *bdrv);
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extern BlockInterfaceErrorAction drive_get_onerror(BlockDriverState *bdrv);
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/* serial ports */
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37
vl.c
37
vl.c
@ -2200,6 +2200,17 @@ const char *drive_get_serial(BlockDriverState *bdrv)
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return "\0";
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}
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BlockInterfaceErrorAction drive_get_onerror(BlockDriverState *bdrv)
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{
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int index;
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for (index = 0; index < nb_drives; index++)
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if (drives_table[index].bdrv == bdrv)
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return drives_table[index].onerror;
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return BLOCK_ERR_REPORT;
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}
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static void bdrv_format_print(void *opaque, const char *name)
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{
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fprintf(stderr, " %s", name);
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@ -2222,12 +2233,13 @@ static int drive_init(struct drive_opt *arg, int snapshot,
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int max_devs;
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int index;
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int cache;
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int bdrv_flags;
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int bdrv_flags, onerror;
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char *str = arg->opt;
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static const char * const params[] = { "bus", "unit", "if", "index",
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"cyls", "heads", "secs", "trans",
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"media", "snapshot", "file",
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"cache", "format", "serial", NULL };
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"cache", "format", "serial", "werror",
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NULL };
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if (check_params(buf, sizeof(buf), params, str) < 0) {
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fprintf(stderr, "qemu: unknown parameter '%s' in '%s'\n",
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@ -2417,6 +2429,26 @@ static int drive_init(struct drive_opt *arg, int snapshot,
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if (!get_param_value(serial, sizeof(serial), "serial", str))
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memset(serial, 0, sizeof(serial));
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onerror = BLOCK_ERR_REPORT;
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if (get_param_value(buf, sizeof(serial), "werror", str)) {
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if (type != IF_IDE) {
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fprintf(stderr, "werror is supported only by IDE\n");
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return -1;
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}
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if (!strcmp(buf, "ignore"))
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onerror = BLOCK_ERR_IGNORE;
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else if (!strcmp(buf, "enospc"))
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onerror = BLOCK_ERR_STOP_ENOSPC;
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else if (!strcmp(buf, "stop"))
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onerror = BLOCK_ERR_STOP_ANY;
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else if (!strcmp(buf, "report"))
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onerror = BLOCK_ERR_REPORT;
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else {
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fprintf(stderr, "qemu: '%s' invalid write error action\n", buf);
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return -1;
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}
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}
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/* compute bus and unit according index */
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if (index != -1) {
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@ -2480,6 +2512,7 @@ static int drive_init(struct drive_opt *arg, int snapshot,
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drives_table[nb_drives].type = type;
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drives_table[nb_drives].bus = bus_id;
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drives_table[nb_drives].unit = unit_id;
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drives_table[nb_drives].onerror = onerror;
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strncpy(drives_table[nb_drives].serial, serial, sizeof(serial));
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nb_drives++;
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