mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-08-08 02:03:56 -06:00
blockdev: Collect block device code in new blockdev.c
Anything that moves hundreds of lines out of vl.c can't be all bad. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Markus Armbruster
Kevin Wolf
parent
7b370f5130
commit
666daa6823
34 changed files with 692 additions and 660 deletions
483
vl.c
483
vl.c
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@ -140,7 +140,7 @@ int main(int argc, char **argv)
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#include "qemu-char.h"
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#include "cache-utils.h"
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#include "block.h"
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#include "block_int.h"
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#include "blockdev.h"
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#include "block-migration.h"
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#include "dma.h"
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#include "audio/audio.h"
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@ -172,7 +172,6 @@ int main(int argc, char **argv)
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static const char *data_dir;
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const char *bios_name = NULL;
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struct drivelist drives = QTAILQ_HEAD_INITIALIZER(drives);
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enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB;
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DisplayType display_type = DT_DEFAULT;
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const char* keyboard_layout = NULL;
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@ -651,486 +650,6 @@ static int bt_parse(const char *opt)
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#define MTD_ALIAS "if=mtd"
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#define SD_ALIAS "index=0,if=sd"
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QemuOpts *drive_add(const char *file, const char *fmt, ...)
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{
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va_list ap;
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char optstr[1024];
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QemuOpts *opts;
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va_start(ap, fmt);
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vsnprintf(optstr, sizeof(optstr), fmt, ap);
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va_end(ap);
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opts = qemu_opts_parse(&qemu_drive_opts, optstr, 0);
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if (!opts) {
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return NULL;
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}
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if (file)
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qemu_opt_set(opts, "file", file);
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return opts;
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}
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DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
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{
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DriveInfo *dinfo;
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/* seek interface, bus and unit */
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (dinfo->type == type &&
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dinfo->bus == bus &&
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dinfo->unit == unit)
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return dinfo;
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}
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return NULL;
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}
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DriveInfo *drive_get_by_id(const char *id)
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{
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DriveInfo *dinfo;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (strcmp(id, dinfo->id))
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continue;
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return dinfo;
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}
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return NULL;
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}
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int drive_get_max_bus(BlockInterfaceType type)
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{
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int max_bus;
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DriveInfo *dinfo;
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max_bus = -1;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if(dinfo->type == type &&
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dinfo->bus > max_bus)
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max_bus = dinfo->bus;
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}
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return max_bus;
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}
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const char *drive_get_serial(BlockDriverState *bdrv)
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{
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DriveInfo *dinfo;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (dinfo->bdrv == bdrv)
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return dinfo->serial;
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}
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return "\0";
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}
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BlockInterfaceErrorAction drive_get_on_error(
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BlockDriverState *bdrv, int is_read)
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{
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DriveInfo *dinfo;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (dinfo->bdrv == bdrv)
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return is_read ? dinfo->on_read_error : dinfo->on_write_error;
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}
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return is_read ? BLOCK_ERR_REPORT : BLOCK_ERR_STOP_ENOSPC;
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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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}
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void drive_uninit(DriveInfo *dinfo)
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{
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qemu_opts_del(dinfo->opts);
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bdrv_delete(dinfo->bdrv);
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QTAILQ_REMOVE(&drives, dinfo, next);
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qemu_free(dinfo);
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}
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static int parse_block_error_action(const char *buf, int is_read)
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{
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if (!strcmp(buf, "ignore")) {
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return BLOCK_ERR_IGNORE;
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} else if (!is_read && !strcmp(buf, "enospc")) {
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return BLOCK_ERR_STOP_ENOSPC;
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} else if (!strcmp(buf, "stop")) {
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return BLOCK_ERR_STOP_ANY;
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} else if (!strcmp(buf, "report")) {
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return BLOCK_ERR_REPORT;
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} else {
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fprintf(stderr, "qemu: '%s' invalid %s error action\n",
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buf, is_read ? "read" : "write");
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return -1;
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}
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}
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DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
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{
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const char *buf;
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const char *file = NULL;
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char devname[128];
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const char *serial;
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const char *mediastr = "";
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BlockInterfaceType type;
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enum { MEDIA_DISK, MEDIA_CDROM } media;
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int bus_id, unit_id;
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int cyls, heads, secs, translation;
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BlockDriver *drv = NULL;
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int max_devs;
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int index;
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int ro = 0;
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int bdrv_flags = 0;
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int on_read_error, on_write_error;
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const char *devaddr;
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DriveInfo *dinfo;
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int snapshot = 0;
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int ret;
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*fatal_error = 1;
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translation = BIOS_ATA_TRANSLATION_AUTO;
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if (default_to_scsi) {
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type = IF_SCSI;
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max_devs = MAX_SCSI_DEVS;
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pstrcpy(devname, sizeof(devname), "scsi");
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} else {
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type = IF_IDE;
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max_devs = MAX_IDE_DEVS;
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pstrcpy(devname, sizeof(devname), "ide");
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}
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media = MEDIA_DISK;
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/* extract parameters */
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bus_id = qemu_opt_get_number(opts, "bus", 0);
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unit_id = qemu_opt_get_number(opts, "unit", -1);
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index = qemu_opt_get_number(opts, "index", -1);
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cyls = qemu_opt_get_number(opts, "cyls", 0);
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heads = qemu_opt_get_number(opts, "heads", 0);
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secs = qemu_opt_get_number(opts, "secs", 0);
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snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
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ro = qemu_opt_get_bool(opts, "readonly", 0);
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file = qemu_opt_get(opts, "file");
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serial = qemu_opt_get(opts, "serial");
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if ((buf = qemu_opt_get(opts, "if")) != NULL) {
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pstrcpy(devname, sizeof(devname), buf);
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if (!strcmp(buf, "ide")) {
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type = IF_IDE;
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max_devs = MAX_IDE_DEVS;
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} else if (!strcmp(buf, "scsi")) {
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type = IF_SCSI;
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max_devs = MAX_SCSI_DEVS;
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} else if (!strcmp(buf, "floppy")) {
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type = IF_FLOPPY;
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max_devs = 0;
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} else if (!strcmp(buf, "pflash")) {
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type = IF_PFLASH;
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max_devs = 0;
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} else if (!strcmp(buf, "mtd")) {
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type = IF_MTD;
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max_devs = 0;
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} else if (!strcmp(buf, "sd")) {
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type = IF_SD;
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max_devs = 0;
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} else if (!strcmp(buf, "virtio")) {
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type = IF_VIRTIO;
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max_devs = 0;
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} else if (!strcmp(buf, "xen")) {
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type = IF_XEN;
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max_devs = 0;
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} else if (!strcmp(buf, "none")) {
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type = IF_NONE;
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max_devs = 0;
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} else {
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fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf);
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return NULL;
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}
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}
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if (cyls || heads || secs) {
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if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
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fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
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return NULL;
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}
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if (heads < 1 || (type == IF_IDE && heads > 16)) {
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fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
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return NULL;
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}
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if (secs < 1 || (type == IF_IDE && secs > 63)) {
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fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
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return NULL;
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}
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}
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if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
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if (!cyls) {
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fprintf(stderr,
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"qemu: '%s' trans must be used with cyls,heads and secs\n",
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buf);
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return NULL;
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}
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if (!strcmp(buf, "none"))
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translation = BIOS_ATA_TRANSLATION_NONE;
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else if (!strcmp(buf, "lba"))
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translation = BIOS_ATA_TRANSLATION_LBA;
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else if (!strcmp(buf, "auto"))
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translation = BIOS_ATA_TRANSLATION_AUTO;
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else {
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fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
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return NULL;
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}
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}
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if ((buf = qemu_opt_get(opts, "media")) != NULL) {
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if (!strcmp(buf, "disk")) {
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media = MEDIA_DISK;
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} else if (!strcmp(buf, "cdrom")) {
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if (cyls || secs || heads) {
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fprintf(stderr,
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"qemu: '%s' invalid physical CHS format\n", buf);
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return NULL;
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}
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media = MEDIA_CDROM;
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} else {
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fprintf(stderr, "qemu: '%s' invalid media\n", buf);
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return NULL;
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}
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}
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if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
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if (!strcmp(buf, "off") || !strcmp(buf, "none")) {
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bdrv_flags |= BDRV_O_NOCACHE;
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} else if (!strcmp(buf, "writeback")) {
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bdrv_flags |= BDRV_O_CACHE_WB;
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} else if (!strcmp(buf, "unsafe")) {
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bdrv_flags |= BDRV_O_CACHE_WB;
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bdrv_flags |= BDRV_O_NO_FLUSH;
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} else if (!strcmp(buf, "writethrough")) {
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/* this is the default */
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} else {
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fprintf(stderr, "qemu: invalid cache option\n");
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return NULL;
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}
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}
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#ifdef CONFIG_LINUX_AIO
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if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
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if (!strcmp(buf, "native")) {
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bdrv_flags |= BDRV_O_NATIVE_AIO;
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} else if (!strcmp(buf, "threads")) {
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/* this is the default */
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} else {
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fprintf(stderr, "qemu: invalid aio option\n");
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return NULL;
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}
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}
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#endif
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if ((buf = qemu_opt_get(opts, "format")) != NULL) {
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if (strcmp(buf, "?") == 0) {
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fprintf(stderr, "qemu: Supported formats:");
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bdrv_iterate_format(bdrv_format_print, NULL);
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fprintf(stderr, "\n");
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return NULL;
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}
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drv = bdrv_find_whitelisted_format(buf);
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if (!drv) {
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fprintf(stderr, "qemu: '%s' invalid format\n", buf);
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return NULL;
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}
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}
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on_write_error = BLOCK_ERR_STOP_ENOSPC;
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if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
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if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
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fprintf(stderr, "werror is no supported by this format\n");
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return NULL;
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}
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on_write_error = parse_block_error_action(buf, 0);
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if (on_write_error < 0) {
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return NULL;
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}
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}
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on_read_error = BLOCK_ERR_REPORT;
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if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
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if (type != IF_IDE && type != IF_VIRTIO && type != IF_NONE) {
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fprintf(stderr, "rerror is no supported by this format\n");
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return NULL;
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}
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on_read_error = parse_block_error_action(buf, 1);
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if (on_read_error < 0) {
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return NULL;
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}
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}
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if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
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if (type != IF_VIRTIO) {
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fprintf(stderr, "addr is not supported\n");
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return NULL;
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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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if (bus_id != 0 || unit_id != -1) {
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fprintf(stderr,
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"qemu: index cannot be used with bus and unit\n");
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return NULL;
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}
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if (max_devs == 0)
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{
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unit_id = index;
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bus_id = 0;
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} else {
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unit_id = index % max_devs;
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bus_id = index / max_devs;
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}
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}
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/* if user doesn't specify a unit_id,
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* try to find the first free
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*/
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if (unit_id == -1) {
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unit_id = 0;
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while (drive_get(type, bus_id, unit_id) != NULL) {
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unit_id++;
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if (max_devs && unit_id >= max_devs) {
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unit_id -= max_devs;
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bus_id++;
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}
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}
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}
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/* check unit id */
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if (max_devs && unit_id >= max_devs) {
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fprintf(stderr, "qemu: unit %d too big (max is %d)\n",
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unit_id, max_devs - 1);
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return NULL;
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}
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/*
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* ignore multiple definitions
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*/
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if (drive_get(type, bus_id, unit_id) != NULL) {
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*fatal_error = 0;
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return NULL;
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}
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/* init */
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dinfo = qemu_mallocz(sizeof(*dinfo));
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if ((buf = qemu_opts_id(opts)) != NULL) {
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dinfo->id = qemu_strdup(buf);
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} else {
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/* no id supplied -> create one */
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dinfo->id = qemu_mallocz(32);
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if (type == IF_IDE || type == IF_SCSI)
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mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
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if (max_devs)
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snprintf(dinfo->id, 32, "%s%i%s%i",
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devname, bus_id, mediastr, unit_id);
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else
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snprintf(dinfo->id, 32, "%s%s%i",
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devname, mediastr, unit_id);
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}
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dinfo->bdrv = bdrv_new(dinfo->id);
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dinfo->devaddr = devaddr;
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dinfo->type = type;
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dinfo->bus = bus_id;
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dinfo->unit = unit_id;
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dinfo->on_read_error = on_read_error;
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dinfo->on_write_error = on_write_error;
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dinfo->opts = opts;
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if (serial)
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strncpy(dinfo->serial, serial, sizeof(serial));
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QTAILQ_INSERT_TAIL(&drives, dinfo, next);
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switch(type) {
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case IF_IDE:
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case IF_SCSI:
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case IF_XEN:
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case IF_NONE:
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switch(media) {
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case MEDIA_DISK:
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if (cyls != 0) {
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bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
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bdrv_set_translation_hint(dinfo->bdrv, translation);
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}
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break;
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case MEDIA_CDROM:
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bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
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break;
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}
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break;
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case IF_SD:
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/* FIXME: This isn't really a floppy, but it's a reasonable
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approximation. */
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case IF_FLOPPY:
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bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY);
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break;
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case IF_PFLASH:
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case IF_MTD:
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break;
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case IF_VIRTIO:
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/* add virtio block device */
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opts = qemu_opts_create(&qemu_device_opts, NULL, 0);
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qemu_opt_set(opts, "driver", "virtio-blk-pci");
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qemu_opt_set(opts, "drive", dinfo->id);
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if (devaddr)
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qemu_opt_set(opts, "addr", devaddr);
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break;
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case IF_COUNT:
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||||
abort();
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}
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||||
if (!file) {
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*fatal_error = 0;
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return NULL;
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}
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if (snapshot) {
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||||
/* always use cache=unsafe with snapshot */
|
||||
bdrv_flags &= ~BDRV_O_CACHE_MASK;
|
||||
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
|
||||
}
|
||||
|
||||
if (media == MEDIA_CDROM) {
|
||||
/* CDROM is fine for any interface, don't check. */
|
||||
ro = 1;
|
||||
} else if (ro == 1) {
|
||||
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
|
||||
fprintf(stderr, "qemu: readonly flag not supported for drive with this interface\n");
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
||||
|
||||
ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
|
||||
if (ret < 0) {
|
||||
fprintf(stderr, "qemu: could not open disk image %s: %s\n",
|
||||
file, strerror(-ret));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (bdrv_key_required(dinfo->bdrv))
|
||||
autostart = 0;
|
||||
*fatal_error = 0;
|
||||
return dinfo;
|
||||
}
|
||||
|
||||
static int drive_init_func(QemuOpts *opts, void *opaque)
|
||||
{
|
||||
int *use_scsi = opaque;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue