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Add "cache" parameter to "-drive" (Laurent Vivier).

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3848 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
balrog 2007-12-24 14:33:24 +00:00
parent 3e98dc8ec6
commit 33f002714b
12 changed files with 102 additions and 32 deletions
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8
block-raw-posix.c
View File

@ -106,6 +106,10 @@ static int raw_open(BlockDriverState *bs, const char *filename, int flags)
}
if (flags & BDRV_O_CREAT)
open_flags |= O_CREAT | O_TRUNC;
#ifdef O_DIRECT
if (flags & BDRV_O_DIRECT)
open_flags |= O_DIRECT;
#endif
s->type = FTYPE_FILE;
@ -659,6 +663,10 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
open_flags |= O_RDONLY;
bs->read_only = 1;
}
#ifdef O_DIRECT
if (flags & BDRV_O_DIRECT)
open_flags |= O_DIRECT;
#endif
s->type = FTYPE_FILE;
#if defined(__linux__)

4
block-raw-win32.c
View File

@ -105,6 +105,8 @@ static int raw_open(BlockDriverState *bs, const char *filename, int flags)
#else
overlapped = FILE_FLAG_OVERLAPPED;
#endif
if (flags & BDRV_O_DIRECT)
overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
create_flags, overlapped, NULL);
@ -473,6 +475,8 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
#else
overlapped = FILE_FLAG_OVERLAPPED;
#endif
if (flags & BDRV_O_DIRECT)
overlapped |= FILE_FLAG_NO_BUFFERING | FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
create_flags, overlapped, NULL);

2
block.c
View File

@ -380,7 +380,7 @@ int bdrv_open2(BlockDriverState *bs, const char *filename, int flags,
/* Note: for compatibility, we open disk image files as RDWR, and
RDONLY as fallback */
if (!(flags & BDRV_O_FILE))
open_flags = BDRV_O_RDWR;
open_flags = BDRV_O_RDWR | (flags & BDRV_O_DIRECT);
else
open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT);
ret = drv->bdrv_open(bs, filename, open_flags);

1
block.h
View File

@ -44,6 +44,7 @@ typedef struct QEMUSnapshotInfo {
use a disk image format on top of
it (default for
bdrv_file_open()) */
#define BDRV_O_DIRECT 0x0020
#ifndef QEMU_IMG
void bdrv_info(void);

7
hw/fdc.c
View File

@ -382,7 +382,7 @@ struct fdctrl_t {
uint8_t cur_drv;
uint8_t bootsel;
/* Command FIFO */
uint8_t fifo[FD_SECTOR_LEN];
uint8_t *fifo;
uint32_t data_pos;
uint32_t data_len;
uint8_t data_state;
@ -598,6 +598,11 @@ fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped,
fdctrl = qemu_mallocz(sizeof(fdctrl_t));
if (!fdctrl)
return NULL;
fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN);
if (fdctrl->fifo == NULL) {
qemu_free(fdctrl);
return NULL;
}
fdctrl->result_timer = qemu_new_timer(vm_clock,
fdctrl_result_timer, fdctrl);

18
hw/ide.c
View File

@ -365,7 +365,7 @@ typedef struct IDEState {
EndTransferFunc *end_transfer_func;
uint8_t *data_ptr;
uint8_t *data_end;
uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4];
uint8_t *io_buffer;
QEMUTimer *sector_write_timer; /* only used for win2k install hack */
uint32_t irq_count; /* counts IRQs when using win2k install hack */
/* CF-ATA extended error */
@ -2377,17 +2377,24 @@ struct partition {
static int guess_disk_lchs(IDEState *s,
int *pcylinders, int *pheads, int *psectors)
{
uint8_t buf[512];
uint8_t *buf;
int ret, i, heads, sectors, cylinders;
struct partition *p;
uint32_t nr_sects;
buf = qemu_memalign(512, 512);
if (buf == NULL)
return -1;
ret = bdrv_read(s->bs, 0, buf, 1);
if (ret < 0)
if (ret < 0) {
qemu_free(buf);
return -1;
}
/* test msdos magic */
if (buf[510] != 0x55 || buf[511] != 0xaa)
if (buf[510] != 0x55 || buf[511] != 0xaa) {
qemu_free(buf);
return -1;
}
for(i = 0; i < 4; i++) {
p = ((struct partition *)(buf + 0x1be)) + i;
nr_sects = le32_to_cpu(p->nr_sects);
@ -2408,9 +2415,11 @@ static int guess_disk_lchs(IDEState *s,
printf("guessed geometry: LCHS=%d %d %d\n",
cylinders, heads, sectors);
#endif
qemu_free(buf);
return 0;
}
}
qemu_free(buf);
return -1;
}
@ -2425,6 +2434,7 @@ static void ide_init2(IDEState *ide_state,
for(i = 0; i < 2; i++) {
s = ide_state + i;
s->io_buffer = qemu_memalign(512, MAX_MULT_SECTORS*512 + 4);
if (i == 0)
s->bs = hd0;
else

3
hw/scsi-disk.c
View File

@ -46,7 +46,7 @@ typedef struct SCSIRequest {
int sector_count;
/* The amounnt of data in the buffer. */
int buf_len;
uint8_t dma_buf[SCSI_DMA_BUF_SIZE];
uint8_t *dma_buf;
BlockDriverAIOCB *aiocb;
struct SCSIRequest *next;
} SCSIRequest;
@ -78,6 +78,7 @@ static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
free_requests = r->next;
} else {
r = qemu_malloc(sizeof(SCSIRequest));
r->dma_buf = qemu_memalign(512, SCSI_DMA_BUF_SIZE);
}
r->dev = s;
r->tag = tag;

40
hw/sd.c
View File

@ -96,6 +96,7 @@ struct SDState {
qemu_irq readonly_cb;
qemu_irq inserted_cb;
BlockDriverState *bdrv;
uint8_t *buf;
};
static void sd_set_status(SDState *sd)
@ -405,6 +406,7 @@ SDState *sd_init(BlockDriverState *bs, int is_spi)
SDState *sd;
sd = (SDState *) qemu_mallocz(sizeof(SDState));
sd->buf = qemu_memalign(512, 512);
sd->spi = is_spi;
sd_reset(sd, bs);
bdrv_set_change_cb(sd->bdrv, sd_cardchange, sd);
@ -1281,64 +1283,60 @@ int sd_do_command(SDState *sd, struct sd_request_s *req,
}
/* No real need for 64 bit addresses here */
static void sd_blk_read(BlockDriverState *bdrv,
void *data, uint32_t addr, uint32_t len)
static void sd_blk_read(SDState *sd, uint32_t addr, uint32_t len)
{
uint8_t buf[512];
uint32_t end = addr + len;
if (!bdrv || bdrv_read(bdrv, addr >> 9, buf, 1) == -1) {
if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
printf("sd_blk_read: read error on host side\n");
return;
}
if (end > (addr & ~511) + 512) {
memcpy(data, buf + (addr & 511), 512 - (addr & 511));
memcpy(sd->data, sd->buf + (addr & 511), 512 - (addr & 511));
if (bdrv_read(bdrv, end >> 9, buf, 1) == -1) {
if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) == -1) {
printf("sd_blk_read: read error on host side\n");
return;
}
memcpy(data + 512 - (addr & 511), buf, end & 511);
memcpy(sd->data + 512 - (addr & 511), sd->buf, end & 511);
} else
memcpy(data, buf + (addr & 511), len);
memcpy(sd->data, sd->buf + (addr & 511), len);
}
static void sd_blk_write(BlockDriverState *bdrv,
void *data, uint32_t addr, uint32_t len)
static void sd_blk_write(SDState *sd, uint32_t addr, uint32_t len)
{
uint8_t buf[512];
uint32_t end = addr + len;
if ((addr & 511) || len < 512)
if (!bdrv || bdrv_read(bdrv, addr >> 9, buf, 1) == -1) {
if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
printf("sd_blk_write: read error on host side\n");
return;
}
if (end > (addr & ~511) + 512) {
memcpy(buf + (addr & 511), data, 512 - (addr & 511));
if (bdrv_write(bdrv, addr >> 9, buf, 1) == -1) {
memcpy(sd->buf + (addr & 511), sd->data, 512 - (addr & 511));
if (bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
printf("sd_blk_write: write error on host side\n");
return;
}
if (bdrv_read(bdrv, end >> 9, buf, 1) == -1) {
if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) == -1) {
printf("sd_blk_write: read error on host side\n");
return;
}
memcpy(buf, data + 512 - (addr & 511), end & 511);
if (bdrv_write(bdrv, end >> 9, buf, 1) == -1)
memcpy(sd->buf, sd->data + 512 - (addr & 511), end & 511);
if (bdrv_write(sd->bdrv, end >> 9, sd->buf, 1) == -1)
printf("sd_blk_write: write error on host side\n");
} else {
memcpy(buf + (addr & 511), data, len);
if (!bdrv || bdrv_write(bdrv, addr >> 9, buf, 1) == -1)
memcpy(sd->buf + (addr & 511), sd->data, len);
if (!sd->bdrv || bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) == -1)
printf("sd_blk_write: write error on host side\n");
}
}
#define BLK_READ_BLOCK(a, len) sd_blk_read(sd->bdrv, sd->data, a, len)
#define BLK_WRITE_BLOCK(a, len) sd_blk_write(sd->bdrv, sd->data, a, len)
#define BLK_READ_BLOCK(a, len) sd_blk_read(sd, a, len)
#define BLK_WRITE_BLOCK(a, len) sd_blk_write(sd, a, len)
#define APP_READ_BLOCK(a, len) memset(sd->data, 0xec, len)
#define APP_WRITE_BLOCK(a, len)

20
osdep.c
View File

@ -61,6 +61,10 @@ void *qemu_malloc(size_t size)
}
#if defined(_WIN32)
void *qemu_memalign(size_t alignment, size_t size)
{
return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
}
void *qemu_vmalloc(size_t size)
{
@ -172,6 +176,22 @@ static void kqemu_vfree(void *ptr)
#endif
void *qemu_memalign(size_t alignment, size_t size)
{
#if defined(_POSIX_C_SOURCE)
int ret;
void *ptr;
ret = posix_memalign(&ptr, alignment, size);
if (ret != 0)
return NULL;
return ptr;
#elif defined(_BSD)
return valloc(size);
#else
return memalign(alignment, size);
#endif
}
/* alloc shared memory pages */
void *qemu_vmalloc(size_t size)
{

1
osdep.h
View File

@ -48,6 +48,7 @@ void *qemu_mallocz(size_t size);
void qemu_free(void *ptr);
char *qemu_strdup(const char *str);
void *qemu_memalign(size_t alignment, size_t size);
void *qemu_vmalloc(size_t size);
void qemu_vfree(void *ptr);

2
qemu-doc.texi
View File

@ -250,6 +250,8 @@ This option defines the type of the media: disk or cdrom.
These options have the same definition as they have in @option{-hdachs}.
@item snapshot=@var{snapshot}
@var{snapshot} is "on" or "off" and allows to enable snapshot for given drive (see @option{-snapshot}).
@item cache=@var{cache}
@var{cache} is "on" or "off" and allows to disable host cache to access data.
@end table
Instead of @option{-cdrom} you can use:

28
vl.c
View File

@ -4880,8 +4880,11 @@ static int drive_init(const char *str, int snapshot, QEMUMachine *machine)
BlockDriverState *bdrv;
int max_devs;
int index;
int cache;
int bdrv_flags;
char *params[] = { "bus", "unit", "if", "index", "cyls", "heads",
"secs", "trans", "media", "snapshot", "file", NULL };
"secs", "trans", "media", "snapshot", "file",
"cache", NULL };
if (check_params(buf, sizeof(buf), params, str) < 0) {
fprintf(stderr, "qemu: unknowm parameter '%s' in '%s'\n",
@ -4895,6 +4898,7 @@ static int drive_init(const char *str, int snapshot, QEMUMachine *machine)
unit_id = -1;
translation = BIOS_ATA_TRANSLATION_AUTO;
index = -1;
cache = 1;
if (!strcmp(machine->name, "realview") ||
!strcmp(machine->name, "SS-5") ||
@ -5037,6 +5041,17 @@ static int drive_init(const char *str, int snapshot, QEMUMachine *machine)
}
}
if (get_param_value(buf, sizeof(buf), "cache", str)) {
if (!strcmp(buf, "off"))
cache = 0;
else if (!strcmp(buf, "on"))
cache = 1;
else {
fprintf(stderr, "qemu: invalid cache option\n");
return -1;
}
}
get_param_value(file, sizeof(file), "file", str);
/* compute bus and unit according index */
@ -5131,8 +5146,12 @@ static int drive_init(const char *str, int snapshot, QEMUMachine *machine)
}
if (!file[0])
return 0;
if (bdrv_open(bdrv, file, snapshot ? BDRV_O_SNAPSHOT : 0) < 0 ||
qemu_key_check(bdrv, file)) {
bdrv_flags = 0;
if (snapshot)
bdrv_flags |= BDRV_O_SNAPSHOT;
if (!cache)
bdrv_flags |= BDRV_O_DIRECT;
if (bdrv_open(bdrv, file, bdrv_flags) < 0 || qemu_key_check(bdrv, file)) {
fprintf(stderr, "qemu: could not open disk image %s\n",
file);
return -1;
@ -7480,7 +7499,8 @@ static void help(int exitcode)
"-hdc/-hdd file use 'file' as IDE hard disk 2/3 image\n"
"-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)\n"
"-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][index=i]\n"
" [,cyls=c,heads=h,secs=s[,trans=t]][snapshot=on|off]\n"
" [,cyls=c,heads=h,secs=s[,trans=t]][snapshot=on|off]"
" [,cache=on|off]\n"
" use 'file' as a drive image\n"
"-mtdblock file use 'file' as on-board Flash memory image\n"
"-sd file use 'file' as SecureDigital card image\n"