/*
* QEMU System Emulator block driver
- *
+ *
* Copyright (c) 2003 Fabrice Bellard
- *
+ *
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
-#include "vl.h"
+#include "config-host.h"
+#ifdef HOST_BSD
+/* include native header before sys-queue.h */
+#include <sys/queue.h>
+#endif
+
+#include "qemu-common.h"
+#include "monitor.h"
#include "block_int.h"
+#include "module.h"
-#ifdef _BSD
+#ifdef HOST_BSD
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
-#include <sys/queue.h>
+#ifndef __DragonFly__
#include <sys/disk.h>
#endif
-
-#ifdef CONFIG_COCOA
-#include <paths.h>
-#include <sys/param.h>
-#include <IOKit/IOKitLib.h>
-#include <IOKit/IOBSD.h>
-#include <IOKit/storage/IOMediaBSDClient.h>
-#include <IOKit/storage/IOMedia.h>
-#include <IOKit/storage/IOCDMedia.h>
-//#include <IOKit/storage/IOCDTypes.h>
-#include <CoreFoundation/CoreFoundation.h>
#endif
-#ifdef __sun__
-#include <sys/dkio.h>
+#ifdef _WIN32
+#include <windows.h>
#endif
-static BlockDriverState *bdrv_first;
+#define SECTOR_BITS 9
+#define SECTOR_SIZE (1 << SECTOR_BITS)
+
+static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs,
+ int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque);
+static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs,
+ int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque);
+static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num,
+ uint8_t *buf, int nb_sectors);
+static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors);
+
+BlockDriverState *bdrv_first;
+
static BlockDriver *first_drv;
-#ifdef CONFIG_COCOA
-static kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator );
-static kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize );
+int path_is_absolute(const char *path)
+{
+ const char *p;
+#ifdef _WIN32
+ /* specific case for names like: "\\.\d:" */
+ if (*path == '/' || *path == '\\')
+ return 1;
+#endif
+ p = strchr(path, ':');
+ if (p)
+ p++;
+ else
+ p = path;
+#ifdef _WIN32
+ return (*p == '/' || *p == '\\');
+#else
+ return (*p == '/');
+#endif
+}
-kern_return_t FindEjectableCDMedia( io_iterator_t *mediaIterator )
+/* if filename is absolute, just copy it to dest. Otherwise, build a
+ path to it by considering it is relative to base_path. URL are
+ supported. */
+void path_combine(char *dest, int dest_size,
+ const char *base_path,
+ const char *filename)
{
- kern_return_t kernResult;
- mach_port_t masterPort;
- CFMutableDictionaryRef classesToMatch;
+ const char *p, *p1;
+ int len;
- kernResult = IOMasterPort( MACH_PORT_NULL, &masterPort );
- if ( KERN_SUCCESS != kernResult ) {
- printf( "IOMasterPort returned %d\n", kernResult );
- }
-
- classesToMatch = IOServiceMatching( kIOCDMediaClass );
- if ( classesToMatch == NULL ) {
- printf( "IOServiceMatching returned a NULL dictionary.\n" );
+ if (dest_size <= 0)
+ return;
+ if (path_is_absolute(filename)) {
+ pstrcpy(dest, dest_size, filename);
} else {
- CFDictionarySetValue( classesToMatch, CFSTR( kIOMediaEjectableKey ), kCFBooleanTrue );
- }
- kernResult = IOServiceGetMatchingServices( masterPort, classesToMatch, mediaIterator );
- if ( KERN_SUCCESS != kernResult )
- {
- printf( "IOServiceGetMatchingServices returned %d\n", kernResult );
- }
-
- return kernResult;
-}
-
-kern_return_t GetBSDPath( io_iterator_t mediaIterator, char *bsdPath, CFIndex maxPathSize )
-{
- io_object_t nextMedia;
- kern_return_t kernResult = KERN_FAILURE;
- *bsdPath = '\0';
- nextMedia = IOIteratorNext( mediaIterator );
- if ( nextMedia )
- {
- CFTypeRef bsdPathAsCFString;
- bsdPathAsCFString = IORegistryEntryCreateCFProperty( nextMedia, CFSTR( kIOBSDNameKey ), kCFAllocatorDefault, 0 );
- if ( bsdPathAsCFString ) {
- size_t devPathLength;
- strcpy( bsdPath, _PATH_DEV );
- strcat( bsdPath, "r" );
- devPathLength = strlen( bsdPath );
- if ( CFStringGetCString( bsdPathAsCFString, bsdPath + devPathLength, maxPathSize - devPathLength, kCFStringEncodingASCII ) ) {
- kernResult = KERN_SUCCESS;
- }
- CFRelease( bsdPathAsCFString );
+ p = strchr(base_path, ':');
+ if (p)
+ p++;
+ else
+ p = base_path;
+ p1 = strrchr(base_path, '/');
+#ifdef _WIN32
+ {
+ const char *p2;
+ p2 = strrchr(base_path, '\\');
+ if (!p1 || p2 > p1)
+ p1 = p2;
}
- IOObjectRelease( nextMedia );
+#endif
+ if (p1)
+ p1++;
+ else
+ p1 = base_path;
+ if (p1 > p)
+ p = p1;
+ len = p - base_path;
+ if (len > dest_size - 1)
+ len = dest_size - 1;
+ memcpy(dest, base_path, len);
+ dest[len] = '\0';
+ pstrcat(dest, dest_size, filename);
}
-
- return kernResult;
}
-#endif
-
void bdrv_register(BlockDriver *bdrv)
{
+ if (!bdrv->bdrv_aio_readv) {
+ /* add AIO emulation layer */
+ bdrv->bdrv_aio_readv = bdrv_aio_readv_em;
+ bdrv->bdrv_aio_writev = bdrv_aio_writev_em;
+ } else if (!bdrv->bdrv_read) {
+ /* add synchronous IO emulation layer */
+ bdrv->bdrv_read = bdrv_read_em;
+ bdrv->bdrv_write = bdrv_write_em;
+ }
bdrv->next = first_drv;
first_drv = bdrv;
}
BlockDriverState **pbs, *bs;
bs = qemu_mallocz(sizeof(BlockDriverState));
- if(!bs)
- return NULL;
pstrcpy(bs->device_name, sizeof(bs->device_name), device_name);
if (device_name[0] != '\0') {
/* insert at the end */
return NULL;
}
-int bdrv_create(BlockDriver *drv,
- const char *filename, int64_t size_in_sectors,
- const char *backing_file, int flags)
+int bdrv_create(BlockDriver *drv, const char* filename,
+ QEMUOptionParameter *options)
{
if (!drv->bdrv_create)
return -ENOTSUP;
- return drv->bdrv_create(filename, size_in_sectors, backing_file, flags);
+
+ return drv->bdrv_create(filename, options);
}
#ifdef _WIN32
void get_tmp_filename(char *filename, int size)
{
- char* p = strrchr(filename, '/');
-
- if (p == NULL)
- return;
+ char temp_dir[MAX_PATH];
- /* XXX: find a better function */
- tmpnam(p);
- *p = '/';
+ GetTempPath(MAX_PATH, temp_dir);
+ GetTempFileName(temp_dir, "qem", 0, filename);
}
#else
void get_tmp_filename(char *filename, int size)
{
int fd;
+ const char *tmpdir;
/* XXX: race condition possible */
- pstrcpy(filename, size, "/tmp/vl.XXXXXX");
+ tmpdir = getenv("TMPDIR");
+ if (!tmpdir)
+ tmpdir = "/tmp";
+ snprintf(filename, size, "%s/vl.XXXXXX", tmpdir);
fd = mkstemp(filename);
close(fd);
}
#endif
-/* XXX: force raw format if block or character device ? It would
- simplify the BSD case */
-static BlockDriver *find_image_format(const char *filename)
+#ifdef _WIN32
+static int is_windows_drive_prefix(const char *filename)
{
- int fd, ret, score, score_max;
- BlockDriver *drv1, *drv;
- uint8_t *buf;
- size_t bufsize = 1024;
+ return (((filename[0] >= 'a' && filename[0] <= 'z') ||
+ (filename[0] >= 'A' && filename[0] <= 'Z')) &&
+ filename[1] == ':');
+}
- fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (fd < 0) {
- buf = NULL;
- ret = 0;
- } else {
-#ifdef DIOCGSECTORSIZE
- {
- unsigned int sectorsize = 512;
- if (!ioctl(fd, DIOCGSECTORSIZE, §orsize) &&
- sectorsize > bufsize)
- bufsize = sectorsize;
- }
+int is_windows_drive(const char *filename)
+{
+ if (is_windows_drive_prefix(filename) &&
+ filename[2] == '\0')
+ return 1;
+ if (strstart(filename, "\\\\.\\", NULL) ||
+ strstart(filename, "//./", NULL))
+ return 1;
+ return 0;
+}
#endif
-#ifdef CONFIG_COCOA
- u_int32_t blockSize = 512;
- if ( !ioctl( fd, DKIOCGETBLOCKSIZE, &blockSize ) && blockSize > bufsize) {
- bufsize = blockSize;
- }
+
+static BlockDriver *find_protocol(const char *filename)
+{
+ BlockDriver *drv1;
+ char protocol[128];
+ int len;
+ const char *p;
+
+#ifdef _WIN32
+ if (is_windows_drive(filename) ||
+ is_windows_drive_prefix(filename))
+ return bdrv_find_format("raw");
#endif
- buf = qemu_malloc(bufsize);
- if (!buf)
- return NULL;
- ret = read(fd, buf, bufsize);
- if (ret < 0) {
- close(fd);
- qemu_free(buf);
- return NULL;
+ p = strchr(filename, ':');
+ if (!p)
+ return bdrv_find_format("raw");
+ len = p - filename;
+ if (len > sizeof(protocol) - 1)
+ len = sizeof(protocol) - 1;
+ memcpy(protocol, filename, len);
+ protocol[len] = '\0';
+ for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
+ if (drv1->protocol_name &&
+ !strcmp(drv1->protocol_name, protocol))
+ return drv1;
+ }
+ return NULL;
+}
+
+/*
+ * Detect host devices. By convention, /dev/cdrom[N] is always
+ * recognized as a host CDROM.
+ */
+static BlockDriver *find_hdev_driver(const char *filename)
+{
+ int score_max = 0, score;
+ BlockDriver *drv = NULL, *d;
+
+ for (d = first_drv; d; d = d->next) {
+ if (d->bdrv_probe_device) {
+ score = d->bdrv_probe_device(filename);
+ if (score > score_max) {
+ score_max = score;
+ drv = d;
+ }
}
- close(fd);
}
-
- drv = NULL;
+
+ return drv;
+}
+
+static BlockDriver *find_image_format(const char *filename)
+{
+ int ret, score, score_max;
+ BlockDriver *drv1, *drv;
+ uint8_t buf[2048];
+ BlockDriverState *bs;
+
+ drv = find_protocol(filename);
+ /* no need to test disk image formats for vvfat */
+ if (drv && strcmp(drv->format_name, "vvfat") == 0)
+ return drv;
+
+ ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY);
+ if (ret < 0)
+ return NULL;
+ ret = bdrv_pread(bs, 0, buf, sizeof(buf));
+ bdrv_delete(bs);
+ if (ret < 0) {
+ return NULL;
+ }
+
score_max = 0;
for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
- score = drv1->bdrv_probe(buf, ret, filename);
- if (score > score_max) {
- score_max = score;
- drv = drv1;
+ if (drv1->bdrv_probe) {
+ score = drv1->bdrv_probe(buf, ret, filename);
+ if (score > score_max) {
+ score_max = score;
+ drv = drv1;
+ }
}
}
- qemu_free(buf);
return drv;
}
-int bdrv_open(BlockDriverState *bs, const char *filename, int snapshot)
-{
-#ifdef CONFIG_COCOA
- if ( strncmp( filename, "/dev/cdrom", 10 ) == 0 ) {
- kern_return_t kernResult;
- io_iterator_t mediaIterator;
- char bsdPath[ MAXPATHLEN ];
- int fd;
-
- kernResult = FindEjectableCDMedia( &mediaIterator );
- kernResult = GetBSDPath( mediaIterator, bsdPath, sizeof( bsdPath ) );
-
- if ( bsdPath[ 0 ] != '\0' ) {
- strcat(bsdPath,"s0");
- /* some CDs don't have a partition 0 */
- fd = open(bsdPath, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (fd < 0) {
- bsdPath[strlen(bsdPath)-1] = '1';
- } else {
- close(fd);
- }
- filename = bsdPath;
- }
-
- if ( mediaIterator )
- IOObjectRelease( mediaIterator );
+int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags)
+{
+ BlockDriverState *bs;
+ int ret;
+
+ bs = bdrv_new("");
+ ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL);
+ if (ret < 0) {
+ bdrv_delete(bs);
+ return ret;
}
-#endif
- return bdrv_open2(bs, filename, snapshot, NULL);
+ bs->growable = 1;
+ *pbs = bs;
+ return 0;
+}
+
+int bdrv_open(BlockDriverState *bs, const char *filename, int flags)
+{
+ return bdrv_open2(bs, filename, flags, NULL);
}
-int bdrv_open2(BlockDriverState *bs, const char *filename, int snapshot,
+int bdrv_open2(BlockDriverState *bs, const char *filename, int flags,
BlockDriver *drv)
{
- int ret;
- char tmp_filename[1024];
-
+ int ret, open_flags;
+ char tmp_filename[PATH_MAX];
+ char backing_filename[PATH_MAX];
+
bs->read_only = 0;
bs->is_temporary = 0;
bs->encrypted = 0;
+ bs->valid_key = 0;
+ /* buffer_alignment defaulted to 512, drivers can change this value */
+ bs->buffer_alignment = 512;
- if (snapshot) {
+ if (flags & BDRV_O_SNAPSHOT) {
BlockDriverState *bs1;
int64_t total_size;
-
+ int is_protocol = 0;
+ BlockDriver *bdrv_qcow2;
+ QEMUOptionParameter *options;
+
/* if snapshot, we create a temporary backing file and open it
instead of opening 'filename' directly */
/* if there is a backing file, use it */
bs1 = bdrv_new("");
- if (!bs1) {
- return -1;
- }
- if (bdrv_open(bs1, filename, 0) < 0) {
+ ret = bdrv_open2(bs1, filename, 0, drv);
+ if (ret < 0) {
bdrv_delete(bs1);
- return -1;
+ return ret;
}
- total_size = bs1->total_sectors;
+ total_size = bdrv_getlength(bs1) >> SECTOR_BITS;
+
+ if (bs1->drv && bs1->drv->protocol_name)
+ is_protocol = 1;
+
bdrv_delete(bs1);
-
+
get_tmp_filename(tmp_filename, sizeof(tmp_filename));
- /* XXX: use cow for linux as it is more efficient ? */
- if (bdrv_create(&bdrv_qcow, tmp_filename,
- total_size, filename, 0) < 0) {
- return -1;
+
+ /* Real path is meaningless for protocols */
+ if (is_protocol)
+ snprintf(backing_filename, sizeof(backing_filename),
+ "%s", filename);
+ else
+ realpath(filename, backing_filename);
+
+ bdrv_qcow2 = bdrv_find_format("qcow2");
+ options = parse_option_parameters("", bdrv_qcow2->create_options, NULL);
+
+ set_option_parameter_int(options, BLOCK_OPT_SIZE, total_size * 512);
+ set_option_parameter(options, BLOCK_OPT_BACKING_FILE, backing_filename);
+ if (drv) {
+ set_option_parameter(options, BLOCK_OPT_BACKING_FMT,
+ drv->format_name);
}
+
+ ret = bdrv_create(bdrv_qcow2, tmp_filename, options);
+ if (ret < 0) {
+ return ret;
+ }
+
filename = tmp_filename;
+ drv = bdrv_qcow2;
bs->is_temporary = 1;
}
pstrcpy(bs->filename, sizeof(bs->filename), filename);
+ if (flags & BDRV_O_FILE) {
+ drv = find_protocol(filename);
+ } else if (!drv) {
+ drv = find_hdev_driver(filename);
+ if (!drv) {
+ drv = find_image_format(filename);
+ }
+ }
if (!drv) {
- drv = find_image_format(filename);
- if (!drv)
- return -1;
+ ret = -ENOENT;
+ goto unlink_and_fail;
}
bs->drv = drv;
bs->opaque = qemu_mallocz(drv->instance_size);
- if (bs->opaque == NULL && drv->instance_size > 0)
- return -1;
-
- ret = drv->bdrv_open(bs, filename);
+ /* Note: for compatibility, we open disk image files as RDWR, and
+ RDONLY as fallback */
+ if (!(flags & BDRV_O_FILE))
+ open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK);
+ else
+ open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT);
+ ret = drv->bdrv_open(bs, filename, open_flags);
+ if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) {
+ ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR);
+ bs->read_only = 1;
+ }
if (ret < 0) {
qemu_free(bs->opaque);
- return -1;
+ bs->opaque = NULL;
+ bs->drv = NULL;
+ unlink_and_fail:
+ if (bs->is_temporary)
+ unlink(filename);
+ return ret;
+ }
+ if (drv->bdrv_getlength) {
+ bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS;
}
#ifndef _WIN32
if (bs->is_temporary) {
unlink(filename);
}
#endif
- if (bs->backing_file[0] != '\0' && drv->bdrv_is_allocated) {
+ if (bs->backing_file[0] != '\0') {
/* if there is a backing file, use it */
+ BlockDriver *back_drv = NULL;
bs->backing_hd = bdrv_new("");
- if (!bs->backing_hd) {
- fail:
+ path_combine(backing_filename, sizeof(backing_filename),
+ filename, bs->backing_file);
+ if (bs->backing_format[0] != '\0')
+ back_drv = bdrv_find_format(bs->backing_format);
+ ret = bdrv_open2(bs->backing_hd, backing_filename, open_flags,
+ back_drv);
+ if (ret < 0) {
bdrv_close(bs);
- return -1;
+ return ret;
}
- if (bdrv_open(bs->backing_hd, bs->backing_file, 0) < 0)
- goto fail;
}
- bs->inserted = 1;
-
- /* call the change callback */
- if (bs->change_cb)
- bs->change_cb(bs->change_opaque);
-
+ if (!bdrv_key_required(bs)) {
+ /* call the change callback */
+ bs->media_changed = 1;
+ if (bs->change_cb)
+ bs->change_cb(bs->change_opaque);
+ }
return 0;
}
void bdrv_close(BlockDriverState *bs)
{
- if (bs->inserted) {
+ if (bs->drv) {
if (bs->backing_hd)
bdrv_delete(bs->backing_hd);
bs->drv->bdrv_close(bs);
#endif
bs->opaque = NULL;
bs->drv = NULL;
- bs->inserted = 0;
/* call the change callback */
+ bs->media_changed = 1;
if (bs->change_cb)
bs->change_cb(bs->change_opaque);
}
void bdrv_delete(BlockDriverState *bs)
{
- /* XXX: remove the driver list */
+ BlockDriverState **pbs;
+
+ pbs = &bdrv_first;
+ while (*pbs != bs && *pbs != NULL)
+ pbs = &(*pbs)->next;
+ if (*pbs == bs)
+ *pbs = bs->next;
+
bdrv_close(bs);
qemu_free(bs);
}
+/*
+ * Run consistency checks on an image
+ *
+ * Returns the number of errors or -errno when an internal error occurs
+ */
+int bdrv_check(BlockDriverState *bs)
+{
+ if (bs->drv->bdrv_check == NULL) {
+ return -ENOTSUP;
+ }
+
+ return bs->drv->bdrv_check(bs);
+}
+
/* commit COW file into the raw image */
int bdrv_commit(BlockDriverState *bs)
{
- int64_t i;
+ BlockDriver *drv = bs->drv;
+ int64_t i, total_sectors;
int n, j;
unsigned char sector[512];
- if (!bs->inserted)
- return -ENOENT;
+ if (!drv)
+ return -ENOMEDIUM;
if (bs->read_only) {
return -EACCES;
return -ENOTSUP;
}
- for (i = 0; i < bs->total_sectors;) {
- if (bs->drv->bdrv_is_allocated(bs, i, 65536, &n)) {
+ total_sectors = bdrv_getlength(bs) >> SECTOR_BITS;
+ for (i = 0; i < total_sectors;) {
+ if (drv->bdrv_is_allocated(bs, i, 65536, &n)) {
for(j = 0; j < n; j++) {
if (bdrv_read(bs, i, sector, 1) != 0) {
return -EIO;
}
}
- if (bs->drv->bdrv_make_empty)
- return bs->drv->bdrv_make_empty(bs);
+ if (drv->bdrv_make_empty)
+ return drv->bdrv_make_empty(bs);
return 0;
}
-/* return -1 if error */
-int bdrv_read(BlockDriverState *bs, int64_t sector_num,
+static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset,
+ size_t size)
+{
+ int64_t len;
+
+ if (!bdrv_is_inserted(bs))
+ return -ENOMEDIUM;
+
+ if (bs->growable)
+ return 0;
+
+ len = bdrv_getlength(bs);
+
+ if (offset < 0)
+ return -EIO;
+
+ if ((offset > len) || (len - offset < size))
+ return -EIO;
+
+ return 0;
+}
+
+static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
+ int nb_sectors)
+{
+ return bdrv_check_byte_request(bs, sector_num * 512, nb_sectors * 512);
+}
+
+/* return < 0 if error. See bdrv_write() for the return codes */
+int bdrv_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
- int ret, n;
BlockDriver *drv = bs->drv;
- if (!bs->inserted)
- return -1;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (bdrv_check_request(bs, sector_num, nb_sectors))
+ return -EIO;
- while (nb_sectors > 0) {
- if (sector_num == 0 && bs->boot_sector_enabled) {
- memcpy(buf, bs->boot_sector_data, 512);
- n = 1;
- } else if (bs->backing_hd) {
- if (drv->bdrv_is_allocated(bs, sector_num, nb_sectors, &n)) {
- ret = drv->bdrv_read(bs, sector_num, buf, n);
- if (ret < 0)
- return -1;
- } else {
- /* read from the base image */
- ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
- if (ret < 0)
- return -1;
- }
- } else {
- ret = drv->bdrv_read(bs, sector_num, buf, nb_sectors);
- if (ret < 0)
- return -1;
- /* no need to loop */
- break;
- }
- nb_sectors -= n;
- sector_num += n;
- buf += n * 512;
- }
- return 0;
+ return drv->bdrv_read(bs, sector_num, buf, nb_sectors);
}
-/* return -1 if error */
-int bdrv_write(BlockDriverState *bs, int64_t sector_num,
+/* Return < 0 if error. Important errors are:
+ -EIO generic I/O error (may happen for all errors)
+ -ENOMEDIUM No media inserted.
+ -EINVAL Invalid sector number or nb_sectors
+ -EACCES Trying to write a read-only device
+*/
+int bdrv_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
- if (!bs->inserted)
- return -1;
+ BlockDriver *drv = bs->drv;
+ if (!bs->drv)
+ return -ENOMEDIUM;
if (bs->read_only)
- return -1;
- if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) {
- memcpy(bs->boot_sector_data, buf, 512);
+ return -EACCES;
+ if (bdrv_check_request(bs, sector_num, nb_sectors))
+ return -EIO;
+
+ return drv->bdrv_write(bs, sector_num, buf, nb_sectors);
+}
+
+int bdrv_pread(BlockDriverState *bs, int64_t offset,
+ void *buf, int count1)
+{
+ uint8_t tmp_buf[SECTOR_SIZE];
+ int len, nb_sectors, count;
+ int64_t sector_num;
+
+ count = count1;
+ /* first read to align to sector start */
+ len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
+ if (len > count)
+ len = count;
+ sector_num = offset >> SECTOR_BITS;
+ if (len > 0) {
+ if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
+ return -EIO;
+ memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len);
+ count -= len;
+ if (count == 0)
+ return count1;
+ sector_num++;
+ buf += len;
+ }
+
+ /* read the sectors "in place" */
+ nb_sectors = count >> SECTOR_BITS;
+ if (nb_sectors > 0) {
+ if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0)
+ return -EIO;
+ sector_num += nb_sectors;
+ len = nb_sectors << SECTOR_BITS;
+ buf += len;
+ count -= len;
+ }
+
+ /* add data from the last sector */
+ if (count > 0) {
+ if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
+ return -EIO;
+ memcpy(buf, tmp_buf, count);
+ }
+ return count1;
+}
+
+int bdrv_pwrite(BlockDriverState *bs, int64_t offset,
+ const void *buf, int count1)
+{
+ uint8_t tmp_buf[SECTOR_SIZE];
+ int len, nb_sectors, count;
+ int64_t sector_num;
+
+ count = count1;
+ /* first write to align to sector start */
+ len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1);
+ if (len > count)
+ len = count;
+ sector_num = offset >> SECTOR_BITS;
+ if (len > 0) {
+ if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
+ return -EIO;
+ memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len);
+ if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0)
+ return -EIO;
+ count -= len;
+ if (count == 0)
+ return count1;
+ sector_num++;
+ buf += len;
+ }
+
+ /* write the sectors "in place" */
+ nb_sectors = count >> SECTOR_BITS;
+ if (nb_sectors > 0) {
+ if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0)
+ return -EIO;
+ sector_num += nb_sectors;
+ len = nb_sectors << SECTOR_BITS;
+ buf += len;
+ count -= len;
+ }
+
+ /* add data from the last sector */
+ if (count > 0) {
+ if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0)
+ return -EIO;
+ memcpy(tmp_buf, buf, count);
+ if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0)
+ return -EIO;
}
- return bs->drv->bdrv_write(bs, sector_num, buf, nb_sectors);
+ return count1;
}
-void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr)
+/**
+ * Truncate file to 'offset' bytes (needed only for file protocols)
+ */
+int bdrv_truncate(BlockDriverState *bs, int64_t offset)
{
- *nb_sectors_ptr = bs->total_sectors;
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_truncate)
+ return -ENOTSUP;
+ return drv->bdrv_truncate(bs, offset);
}
-/* force a given boot sector. */
-void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size)
+/**
+ * Length of a file in bytes. Return < 0 if error or unknown.
+ */
+int64_t bdrv_getlength(BlockDriverState *bs)
{
- bs->boot_sector_enabled = 1;
- if (size > 512)
- size = 512;
- memcpy(bs->boot_sector_data, data, size);
- memset(bs->boot_sector_data + size, 0, 512 - size);
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_getlength) {
+ /* legacy mode */
+ return bs->total_sectors * SECTOR_SIZE;
+ }
+ return drv->bdrv_getlength(bs);
+}
+
+/* return 0 as number of sectors if no device present or error */
+void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr)
+{
+ int64_t length;
+ length = bdrv_getlength(bs);
+ if (length < 0)
+ length = 0;
+ else
+ length = length >> SECTOR_BITS;
+ *nb_sectors_ptr = length;
+}
+
+struct partition {
+ uint8_t boot_ind; /* 0x80 - active */
+ uint8_t head; /* starting head */
+ uint8_t sector; /* starting sector */
+ uint8_t cyl; /* starting cylinder */
+ uint8_t sys_ind; /* What partition type */
+ uint8_t end_head; /* end head */
+ uint8_t end_sector; /* end sector */
+ uint8_t end_cyl; /* end cylinder */
+ uint32_t start_sect; /* starting sector counting from 0 */
+ uint32_t nr_sects; /* nr of sectors in partition */
+} __attribute__((packed));
+
+/* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */
+static int guess_disk_lchs(BlockDriverState *bs,
+ int *pcylinders, int *pheads, int *psectors)
+{
+ uint8_t buf[512];
+ int ret, i, heads, sectors, cylinders;
+ struct partition *p;
+ uint32_t nr_sects;
+ uint64_t nb_sectors;
+
+ bdrv_get_geometry(bs, &nb_sectors);
+
+ ret = bdrv_read(bs, 0, buf, 1);
+ if (ret < 0)
+ return -1;
+ /* test msdos magic */
+ if (buf[510] != 0x55 || buf[511] != 0xaa)
+ return -1;
+ for(i = 0; i < 4; i++) {
+ p = ((struct partition *)(buf + 0x1be)) + i;
+ nr_sects = le32_to_cpu(p->nr_sects);
+ if (nr_sects && p->end_head) {
+ /* We make the assumption that the partition terminates on
+ a cylinder boundary */
+ heads = p->end_head + 1;
+ sectors = p->end_sector & 63;
+ if (sectors == 0)
+ continue;
+ cylinders = nb_sectors / (heads * sectors);
+ if (cylinders < 1 || cylinders > 16383)
+ continue;
+ *pheads = heads;
+ *psectors = sectors;
+ *pcylinders = cylinders;
+#if 0
+ printf("guessed geometry: LCHS=%d %d %d\n",
+ cylinders, heads, sectors);
+#endif
+ return 0;
+ }
+ }
+ return -1;
+}
+
+void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs)
+{
+ int translation, lba_detected = 0;
+ int cylinders, heads, secs;
+ uint64_t nb_sectors;
+
+ /* if a geometry hint is available, use it */
+ bdrv_get_geometry(bs, &nb_sectors);
+ bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs);
+ translation = bdrv_get_translation_hint(bs);
+ if (cylinders != 0) {
+ *pcyls = cylinders;
+ *pheads = heads;
+ *psecs = secs;
+ } else {
+ if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) {
+ if (heads > 16) {
+ /* if heads > 16, it means that a BIOS LBA
+ translation was active, so the default
+ hardware geometry is OK */
+ lba_detected = 1;
+ goto default_geometry;
+ } else {
+ *pcyls = cylinders;
+ *pheads = heads;
+ *psecs = secs;
+ /* disable any translation to be in sync with
+ the logical geometry */
+ if (translation == BIOS_ATA_TRANSLATION_AUTO) {
+ bdrv_set_translation_hint(bs,
+ BIOS_ATA_TRANSLATION_NONE);
+ }
+ }
+ } else {
+ default_geometry:
+ /* if no geometry, use a standard physical disk geometry */
+ cylinders = nb_sectors / (16 * 63);
+
+ if (cylinders > 16383)
+ cylinders = 16383;
+ else if (cylinders < 2)
+ cylinders = 2;
+ *pcyls = cylinders;
+ *pheads = 16;
+ *psecs = 63;
+ if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) {
+ if ((*pcyls * *pheads) <= 131072) {
+ bdrv_set_translation_hint(bs,
+ BIOS_ATA_TRANSLATION_LARGE);
+ } else {
+ bdrv_set_translation_hint(bs,
+ BIOS_ATA_TRANSLATION_LBA);
+ }
+ }
+ }
+ bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs);
+ }
}
-void bdrv_set_geometry_hint(BlockDriverState *bs,
+void bdrv_set_geometry_hint(BlockDriverState *bs,
int cyls, int heads, int secs)
{
bs->cyls = cyls;
bs->translation = translation;
}
-void bdrv_get_geometry_hint(BlockDriverState *bs,
+void bdrv_get_geometry_hint(BlockDriverState *bs,
int *pcyls, int *pheads, int *psecs)
{
*pcyls = bs->cyls;
return bs->read_only;
}
-int bdrv_is_inserted(BlockDriverState *bs)
+int bdrv_is_sg(BlockDriverState *bs)
{
- return bs->inserted;
-}
-
-int bdrv_is_locked(BlockDriverState *bs)
-{
- return bs->locked;
-}
-
-void bdrv_set_locked(BlockDriverState *bs, int locked)
-{
- bs->locked = locked;
+ return bs->sg;
}
-void bdrv_set_change_cb(BlockDriverState *bs,
+/* XXX: no longer used */
+void bdrv_set_change_cb(BlockDriverState *bs,
void (*change_cb)(void *opaque), void *opaque)
{
bs->change_cb = change_cb;
return bs->encrypted;
}
+int bdrv_key_required(BlockDriverState *bs)
+{
+ BlockDriverState *backing_hd = bs->backing_hd;
+
+ if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key)
+ return 1;
+ return (bs->encrypted && !bs->valid_key);
+}
+
int bdrv_set_key(BlockDriverState *bs, const char *key)
{
int ret;
}
if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key)
return -1;
- return bs->drv->bdrv_set_key(bs, key);
+ ret = bs->drv->bdrv_set_key(bs, key);
+ if (ret < 0) {
+ bs->valid_key = 0;
+ } else if (!bs->valid_key) {
+ bs->valid_key = 1;
+ /* call the change callback now, we skipped it on open */
+ bs->media_changed = 1;
+ if (bs->change_cb)
+ bs->change_cb(bs->change_opaque);
+ }
+ return ret;
}
void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size)
{
- if (!bs->inserted || !bs->drv) {
+ if (!bs->drv) {
buf[0] = '\0';
} else {
pstrcpy(buf, buf_size, bs->drv->format_name);
}
}
-void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
+void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
void *opaque)
{
BlockDriver *drv;
return NULL;
}
-void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque)
+void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque)
{
BlockDriverState *bs;
for (bs = bdrv_first; bs != NULL; bs = bs->next) {
- it(opaque, bs->device_name);
+ it(opaque, bs);
}
}
return bs->device_name;
}
-void bdrv_info(void)
+void bdrv_flush(BlockDriverState *bs)
+{
+ if (!bs->drv)
+ return;
+ if (bs->drv->bdrv_flush)
+ bs->drv->bdrv_flush(bs);
+ if (bs->backing_hd)
+ bdrv_flush(bs->backing_hd);
+}
+
+void bdrv_flush_all(void)
+{
+ BlockDriverState *bs;
+
+ for (bs = bdrv_first; bs != NULL; bs = bs->next)
+ if (bs->drv && !bdrv_is_read_only(bs) &&
+ (!bdrv_is_removable(bs) || bdrv_is_inserted(bs)))
+ bdrv_flush(bs);
+}
+
+/*
+ * Returns true iff the specified sector is present in the disk image. Drivers
+ * not implementing the functionality are assumed to not support backing files,
+ * hence all their sectors are reported as allocated.
+ *
+ * 'pnum' is set to the number of sectors (including and immediately following
+ * the specified sector) that are known to be in the same
+ * allocated/unallocated state.
+ *
+ * 'nb_sectors' is the max value 'pnum' should be set to.
+ */
+int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors,
+ int *pnum)
+{
+ int64_t n;
+ if (!bs->drv->bdrv_is_allocated) {
+ if (sector_num >= bs->total_sectors) {
+ *pnum = 0;
+ return 0;
+ }
+ n = bs->total_sectors - sector_num;
+ *pnum = (n < nb_sectors) ? (n) : (nb_sectors);
+ return 1;
+ }
+ return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum);
+}
+
+void bdrv_info(Monitor *mon)
{
BlockDriverState *bs;
for (bs = bdrv_first; bs != NULL; bs = bs->next) {
- term_printf("%s:", bs->device_name);
- term_printf(" type=");
+ monitor_printf(mon, "%s:", bs->device_name);
+ monitor_printf(mon, " type=");
switch(bs->type) {
case BDRV_TYPE_HD:
- term_printf("hd");
+ monitor_printf(mon, "hd");
break;
case BDRV_TYPE_CDROM:
- term_printf("cdrom");
+ monitor_printf(mon, "cdrom");
break;
case BDRV_TYPE_FLOPPY:
- term_printf("floppy");
+ monitor_printf(mon, "floppy");
break;
}
- term_printf(" removable=%d", bs->removable);
+ monitor_printf(mon, " removable=%d", bs->removable);
if (bs->removable) {
- term_printf(" locked=%d", bs->locked);
+ monitor_printf(mon, " locked=%d", bs->locked);
}
- if (bs->inserted) {
- term_printf(" file=%s", bs->filename);
- if (bs->backing_file[0] != '\0')
- term_printf(" backing_file=%s", bs->backing_file);
- term_printf(" ro=%d", bs->read_only);
- term_printf(" drv=%s", bs->drv->format_name);
- if (bs->encrypted)
- term_printf(" encrypted");
+ if (bs->drv) {
+ monitor_printf(mon, " file=");
+ monitor_print_filename(mon, bs->filename);
+ if (bs->backing_file[0] != '\0') {
+ monitor_printf(mon, " backing_file=");
+ monitor_print_filename(mon, bs->backing_file);
+ }
+ monitor_printf(mon, " ro=%d", bs->read_only);
+ monitor_printf(mon, " drv=%s", bs->drv->format_name);
+ monitor_printf(mon, " encrypted=%d", bdrv_is_encrypted(bs));
} else {
- term_printf(" [not inserted]");
+ monitor_printf(mon, " [not inserted]");
}
- term_printf("\n");
+ monitor_printf(mon, "\n");
}
}
+/* The "info blockstats" command. */
+void bdrv_info_stats(Monitor *mon)
+{
+ BlockDriverState *bs;
+
+ for (bs = bdrv_first; bs != NULL; bs = bs->next) {
+ monitor_printf(mon, "%s:"
+ " rd_bytes=%" PRIu64
+ " wr_bytes=%" PRIu64
+ " rd_operations=%" PRIu64
+ " wr_operations=%" PRIu64
+ "\n",
+ bs->device_name,
+ bs->rd_bytes, bs->wr_bytes,
+ bs->rd_ops, bs->wr_ops);
+ }
+}
+
+const char *bdrv_get_encrypted_filename(BlockDriverState *bs)
+{
+ if (bs->backing_hd && bs->backing_hd->encrypted)
+ return bs->backing_file;
+ else if (bs->encrypted)
+ return bs->filename;
+ else
+ return NULL;
+}
+
+void bdrv_get_backing_filename(BlockDriverState *bs,
+ char *filename, int filename_size)
+{
+ if (!bs->backing_hd) {
+ pstrcpy(filename, filename_size, "");
+ } else {
+ pstrcpy(filename, filename_size, bs->backing_file);
+ }
+}
+
+int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_write_compressed)
+ return -ENOTSUP;
+ if (bdrv_check_request(bs, sector_num, nb_sectors))
+ return -EIO;
+ return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors);
+}
+
+int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_get_info)
+ return -ENOTSUP;
+ memset(bdi, 0, sizeof(*bdi));
+ return drv->bdrv_get_info(bs, bdi);
+}
+
+int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf, int64_t pos, int size)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_put_buffer)
+ return -ENOTSUP;
+ return drv->bdrv_put_buffer(bs, buf, pos, size);
+}
+
+int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_get_buffer)
+ return -ENOTSUP;
+ return drv->bdrv_get_buffer(bs, buf, pos, size);
+}
+
/**************************************************************/
-/* RAW block driver */
+/* handling of snapshots */
-typedef struct BDRVRawState {
- int fd;
-} BDRVRawState;
+int bdrv_snapshot_create(BlockDriverState *bs,
+ QEMUSnapshotInfo *sn_info)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_snapshot_create)
+ return -ENOTSUP;
+ return drv->bdrv_snapshot_create(bs, sn_info);
+}
-static int raw_probe(const uint8_t *buf, int buf_size, const char *filename)
+int bdrv_snapshot_goto(BlockDriverState *bs,
+ const char *snapshot_id)
{
- return 1; /* maybe */
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_snapshot_goto)
+ return -ENOTSUP;
+ return drv->bdrv_snapshot_goto(bs, snapshot_id);
}
-static int raw_open(BlockDriverState *bs, const char *filename)
+int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id)
{
- BDRVRawState *s = bs->opaque;
- int fd;
- int64_t size;
-#ifdef _BSD
- struct stat sb;
-#endif
-#ifdef __sun__
- struct dk_minfo minfo;
- int rv;
-#endif
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_snapshot_delete)
+ return -ENOTSUP;
+ return drv->bdrv_snapshot_delete(bs, snapshot_id);
+}
- fd = open(filename, O_RDWR | O_BINARY | O_LARGEFILE);
- if (fd < 0) {
- fd = open(filename, O_RDONLY | O_BINARY | O_LARGEFILE);
- if (fd < 0)
- return -1;
- bs->read_only = 1;
+int bdrv_snapshot_list(BlockDriverState *bs,
+ QEMUSnapshotInfo **psn_info)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv)
+ return -ENOMEDIUM;
+ if (!drv->bdrv_snapshot_list)
+ return -ENOTSUP;
+ return drv->bdrv_snapshot_list(bs, psn_info);
+}
+
+#define NB_SUFFIXES 4
+
+char *get_human_readable_size(char *buf, int buf_size, int64_t size)
+{
+ static const char suffixes[NB_SUFFIXES] = "KMGT";
+ int64_t base;
+ int i;
+
+ if (size <= 999) {
+ snprintf(buf, buf_size, "%" PRId64, size);
+ } else {
+ base = 1024;
+ for(i = 0; i < NB_SUFFIXES; i++) {
+ if (size < (10 * base)) {
+ snprintf(buf, buf_size, "%0.1f%c",
+ (double)size / base,
+ suffixes[i]);
+ break;
+ } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) {
+ snprintf(buf, buf_size, "%" PRId64 "%c",
+ ((size + (base >> 1)) / base),
+ suffixes[i]);
+ break;
+ }
+ base = base * 1024;
+ }
}
-#ifdef _BSD
- if (!fstat(fd, &sb) && (S_IFCHR & sb.st_mode)) {
-#ifdef DIOCGMEDIASIZE
- if (ioctl(fd, DIOCGMEDIASIZE, (off_t *)&size))
-#endif
-#ifdef CONFIG_COCOA
- size = LONG_LONG_MAX;
+ return buf;
+}
+
+char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn)
+{
+ char buf1[128], date_buf[128], clock_buf[128];
+#ifdef _WIN32
+ struct tm *ptm;
#else
- size = lseek(fd, 0LL, SEEK_END);
-#endif
- } else
+ struct tm tm;
#endif
-#ifdef __sun__
- /*
- * use the DKIOCGMEDIAINFO ioctl to read the size.
- */
- rv = ioctl ( fd, DKIOCGMEDIAINFO, &minfo );
- if ( rv != -1 ) {
- size = minfo.dki_lbsize * minfo.dki_capacity;
- } else /* there are reports that lseek on some devices
- fails, but irc discussion said that contingency
- on contingency was overkill */
-#endif
- {
- size = lseek(fd, 0, SEEK_END);
- }
+ time_t ti;
+ int64_t secs;
+
+ if (!sn) {
+ snprintf(buf, buf_size,
+ "%-10s%-20s%7s%20s%15s",
+ "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK");
+ } else {
+ ti = sn->date_sec;
#ifdef _WIN32
- /* On Windows hosts it can happen that we're unable to get file size
- for CD-ROM raw device (it's inherent limitation of the CDFS driver). */
- if (size == -1)
- size = LONG_LONG_MAX;
+ ptm = localtime(&ti);
+ strftime(date_buf, sizeof(date_buf),
+ "%Y-%m-%d %H:%M:%S", ptm);
+#else
+ localtime_r(&ti, &tm);
+ strftime(date_buf, sizeof(date_buf),
+ "%Y-%m-%d %H:%M:%S", &tm);
#endif
- bs->total_sectors = size / 512;
- s->fd = fd;
- return 0;
+ secs = sn->vm_clock_nsec / 1000000000;
+ snprintf(clock_buf, sizeof(clock_buf),
+ "%02d:%02d:%02d.%03d",
+ (int)(secs / 3600),
+ (int)((secs / 60) % 60),
+ (int)(secs % 60),
+ (int)((sn->vm_clock_nsec / 1000000) % 1000));
+ snprintf(buf, buf_size,
+ "%-10s%-20s%7s%20s%15s",
+ sn->id_str, sn->name,
+ get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size),
+ date_buf,
+ clock_buf);
+ }
+ return buf;
}
-static int raw_read(BlockDriverState *bs, int64_t sector_num,
- uint8_t *buf, int nb_sectors)
+
+/**************************************************************/
+/* async I/Os */
+
+BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
+ QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque)
{
- BDRVRawState *s = bs->opaque;
+ BlockDriver *drv = bs->drv;
+ BlockDriverAIOCB *ret;
+
+ if (!drv)
+ return NULL;
+ if (bdrv_check_request(bs, sector_num, nb_sectors))
+ return NULL;
+
+ ret = drv->bdrv_aio_readv(bs, sector_num, qiov, nb_sectors,
+ cb, opaque);
+
+ if (ret) {
+ /* Update stats even though technically transfer has not happened. */
+ bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE;
+ bs->rd_ops ++;
+ }
+
+ return ret;
+}
+
+BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
+ QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque)
+{
+ BlockDriver *drv = bs->drv;
+ BlockDriverAIOCB *ret;
+
+ if (!drv)
+ return NULL;
+ if (bs->read_only)
+ return NULL;
+ if (bdrv_check_request(bs, sector_num, nb_sectors))
+ return NULL;
+
+ ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors,
+ cb, opaque);
+
+ if (ret) {
+ /* Update stats even though technically transfer has not happened. */
+ bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE;
+ bs->wr_ops ++;
+ }
+
+ return ret;
+}
+
+void bdrv_aio_cancel(BlockDriverAIOCB *acb)
+{
+ acb->pool->cancel(acb);
+}
+
+
+/**************************************************************/
+/* async block device emulation */
+
+typedef struct BlockDriverAIOCBSync {
+ BlockDriverAIOCB common;
+ QEMUBH *bh;
int ret;
-
- lseek(s->fd, sector_num * 512, SEEK_SET);
- ret = read(s->fd, buf, nb_sectors * 512);
- if (ret != nb_sectors * 512)
+ /* vector translation state */
+ QEMUIOVector *qiov;
+ uint8_t *bounce;
+ int is_write;
+} BlockDriverAIOCBSync;
+
+static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb)
+{
+ BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb;
+ qemu_bh_cancel(acb->bh);
+ qemu_aio_release(acb);
+}
+
+static AIOPool bdrv_em_aio_pool = {
+ .aiocb_size = sizeof(BlockDriverAIOCBSync),
+ .cancel = bdrv_aio_cancel_em,
+};
+
+static void bdrv_aio_bh_cb(void *opaque)
+{
+ BlockDriverAIOCBSync *acb = opaque;
+
+ if (!acb->is_write)
+ qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size);
+ qemu_vfree(acb->bounce);
+ acb->common.cb(acb->common.opaque, acb->ret);
+
+ qemu_aio_release(acb);
+}
+
+static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
+ int64_t sector_num,
+ QEMUIOVector *qiov,
+ int nb_sectors,
+ BlockDriverCompletionFunc *cb,
+ void *opaque,
+ int is_write)
+
+{
+ BlockDriverAIOCBSync *acb;
+
+ acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque);
+ acb->is_write = is_write;
+ acb->qiov = qiov;
+ acb->bounce = qemu_blockalign(bs, qiov->size);
+
+ if (!acb->bh)
+ acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb);
+
+ if (is_write) {
+ qemu_iovec_to_buffer(acb->qiov, acb->bounce);
+ acb->ret = bdrv_write(bs, sector_num, acb->bounce, nb_sectors);
+ } else {
+ acb->ret = bdrv_read(bs, sector_num, acb->bounce, nb_sectors);
+ }
+
+ qemu_bh_schedule(acb->bh);
+
+ return &acb->common;
+}
+
+static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs,
+ int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque)
+{
+ return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 0);
+}
+
+static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs,
+ int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
+ BlockDriverCompletionFunc *cb, void *opaque)
+{
+ return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1);
+}
+
+/**************************************************************/
+/* sync block device emulation */
+
+static void bdrv_rw_em_cb(void *opaque, int ret)
+{
+ *(int *)opaque = ret;
+}
+
+#define NOT_DONE 0x7fffffff
+
+static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num,
+ uint8_t *buf, int nb_sectors)
+{
+ int async_ret;
+ BlockDriverAIOCB *acb;
+ struct iovec iov;
+ QEMUIOVector qiov;
+
+ async_ret = NOT_DONE;
+ iov.iov_base = (void *)buf;
+ iov.iov_len = nb_sectors * 512;
+ qemu_iovec_init_external(&qiov, &iov, 1);
+ acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors,
+ bdrv_rw_em_cb, &async_ret);
+ if (acb == NULL)
return -1;
- return 0;
+
+ while (async_ret == NOT_DONE) {
+ qemu_aio_wait();
+ }
+
+ return async_ret;
}
-static int raw_write(BlockDriverState *bs, int64_t sector_num,
- const uint8_t *buf, int nb_sectors)
+static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num,
+ const uint8_t *buf, int nb_sectors)
{
- BDRVRawState *s = bs->opaque;
- int ret;
-
- lseek(s->fd, sector_num * 512, SEEK_SET);
- ret = write(s->fd, buf, nb_sectors * 512);
- if (ret != nb_sectors * 512)
+ int async_ret;
+ BlockDriverAIOCB *acb;
+ struct iovec iov;
+ QEMUIOVector qiov;
+
+ async_ret = NOT_DONE;
+ iov.iov_base = (void *)buf;
+ iov.iov_len = nb_sectors * 512;
+ qemu_iovec_init_external(&qiov, &iov, 1);
+ acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors,
+ bdrv_rw_em_cb, &async_ret);
+ if (acb == NULL)
return -1;
- return 0;
+ while (async_ret == NOT_DONE) {
+ qemu_aio_wait();
+ }
+ return async_ret;
}
-static void raw_close(BlockDriverState *bs)
+void bdrv_init(void)
{
- BDRVRawState *s = bs->opaque;
- close(s->fd);
+ module_call_init(MODULE_INIT_BLOCK);
}
-static int raw_create(const char *filename, int64_t total_size,
- const char *backing_file, int flags)
+void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs,
+ BlockDriverCompletionFunc *cb, void *opaque)
{
- int fd;
+ BlockDriverAIOCB *acb;
- if (flags || backing_file)
- return -ENOTSUP;
+ if (pool->free_aiocb) {
+ acb = pool->free_aiocb;
+ pool->free_aiocb = acb->next;
+ } else {
+ acb = qemu_mallocz(pool->aiocb_size);
+ acb->pool = pool;
+ }
+ acb->bs = bs;
+ acb->cb = cb;
+ acb->opaque = opaque;
+ return acb;
+}
- fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE,
- 0644);
- if (fd < 0)
- return -EIO;
- ftruncate(fd, total_size * 512);
- close(fd);
- return 0;
+void qemu_aio_release(void *p)
+{
+ BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p;
+ AIOPool *pool = acb->pool;
+ acb->next = pool->free_aiocb;
+ pool->free_aiocb = acb;
}
-BlockDriver bdrv_raw = {
- "raw",
- sizeof(BDRVRawState),
- raw_probe,
- raw_open,
- raw_read,
- raw_write,
- raw_close,
- raw_create,
-};
+/**************************************************************/
+/* removable device support */
-void bdrv_init(void)
+/**
+ * Return TRUE if the media is present
+ */
+int bdrv_is_inserted(BlockDriverState *bs)
{
- bdrv_register(&bdrv_raw);
-#ifndef _WIN32
- bdrv_register(&bdrv_cow);
-#endif
- bdrv_register(&bdrv_qcow);
- bdrv_register(&bdrv_vmdk);
- bdrv_register(&bdrv_cloop);
- bdrv_register(&bdrv_dmg);
- bdrv_register(&bdrv_bochs);
- bdrv_register(&bdrv_vpc);
- bdrv_register(&bdrv_vvfat);
+ BlockDriver *drv = bs->drv;
+ int ret;
+ if (!drv)
+ return 0;
+ if (!drv->bdrv_is_inserted)
+ return 1;
+ ret = drv->bdrv_is_inserted(bs);
+ return ret;
+}
+
+/**
+ * Return TRUE if the media changed since the last call to this
+ * function. It is currently only used for floppy disks
+ */
+int bdrv_media_changed(BlockDriverState *bs)
+{
+ BlockDriver *drv = bs->drv;
+ int ret;
+
+ if (!drv || !drv->bdrv_media_changed)
+ ret = -ENOTSUP;
+ else
+ ret = drv->bdrv_media_changed(bs);
+ if (ret == -ENOTSUP)
+ ret = bs->media_changed;
+ bs->media_changed = 0;
+ return ret;
+}
+
+/**
+ * If eject_flag is TRUE, eject the media. Otherwise, close the tray
+ */
+void bdrv_eject(BlockDriverState *bs, int eject_flag)
+{
+ BlockDriver *drv = bs->drv;
+ int ret;
+
+ if (!drv || !drv->bdrv_eject) {
+ ret = -ENOTSUP;
+ } else {
+ ret = drv->bdrv_eject(bs, eject_flag);
+ }
+ if (ret == -ENOTSUP) {
+ if (eject_flag)
+ bdrv_close(bs);
+ }
+}
+
+int bdrv_is_locked(BlockDriverState *bs)
+{
+ return bs->locked;
+}
+
+/**
+ * Lock or unlock the media (if it is locked, the user won't be able
+ * to eject it manually).
+ */
+void bdrv_set_locked(BlockDriverState *bs, int locked)
+{
+ BlockDriver *drv = bs->drv;
+
+ bs->locked = locked;
+ if (drv && drv->bdrv_set_locked) {
+ drv->bdrv_set_locked(bs, locked);
+ }
+}
+
+/* needed for generic scsi interface */
+
+int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
+{
+ BlockDriver *drv = bs->drv;
+
+ if (drv && drv->bdrv_ioctl)
+ return drv->bdrv_ioctl(bs, req, buf);
+ return -ENOTSUP;
+}
+
+BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs,
+ unsigned long int req, void *buf,
+ BlockDriverCompletionFunc *cb, void *opaque)
+{
+ BlockDriver *drv = bs->drv;
+
+ if (drv && drv->bdrv_aio_ioctl)
+ return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque);
+ return NULL;
+}
+
+void *qemu_blockalign(BlockDriverState *bs, size_t size)
+{
+ return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size);
}
projects / qemu / blobdiff