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sheepdog: Support .bdrv_co_create 

This adds the .bdrv_co_create driver callback to sheepdog, which enables
image creation over QMP.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2018-02-01 13:20:44 +01:00
parent a595e4bcca
commit 63fd65a0a5
2 changed files with 192 additions and 75 deletions
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243
block/sheepdog.c
View File

@ -15,8 +15,10 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/qapi-visit-sockets.h"
#include "qapi/qapi-visit-block-core.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qobject-input-visitor.h"
#include "qapi/qobject-output-visitor.h"
#include "qemu/uri.h"
#include "qemu/error-report.h"
#include "qemu/option.h"
@ -533,23 +535,6 @@ static void sd_aio_setup(SheepdogAIOCB *acb, BDRVSheepdogState *s,
qemu_co_mutex_unlock(&s->queue_lock);
}
static SocketAddress *sd_socket_address(const char *path,
const char *host, const char *port)
{
SocketAddress *addr = g_new0(SocketAddress, 1);
if (path) {
addr->type = SOCKET_ADDRESS_TYPE_UNIX;
addr->u.q_unix.path = g_strdup(path);
} else {
addr->type = SOCKET_ADDRESS_TYPE_INET;
addr->u.inet.host = g_strdup(host ?: SD_DEFAULT_ADDR);
addr->u.inet.port = g_strdup(port ?: stringify(SD_DEFAULT_PORT));
}
return addr;
}
static SocketAddress *sd_server_config(QDict *options, Error **errp)
{
QDict *server = NULL;
@ -1882,6 +1867,44 @@ out_with_err_set:
return ret;
}
static int sd_create_prealloc(BlockdevOptionsSheepdog *location, int64_t size,
Error **errp)
{
BlockDriverState *bs;
Visitor *v;
QObject *obj = NULL;
QDict *qdict;
Error *local_err = NULL;
int ret;
v = qobject_output_visitor_new(&obj);
visit_type_BlockdevOptionsSheepdog(v, NULL, &location, &local_err);
visit_free(v);
if (local_err) {
error_propagate(errp, local_err);
qobject_decref(obj);
return -EINVAL;
}
qdict = qobject_to_qdict(obj);
qdict_flatten(qdict);
qdict_put_str(qdict, "driver", "sheepdog");
bs = bdrv_open(NULL, NULL, qdict, BDRV_O_PROTOCOL | BDRV_O_RDWR, errp);
if (bs == NULL) {
ret = -EIO;
goto fail;
}
ret = sd_prealloc(bs, 0, size, errp);
fail:
bdrv_unref(bs);
QDECREF(qdict);
return ret;
}
static int parse_redundancy(BDRVSheepdogState *s, SheepdogRedundancy *opt)
{
struct SheepdogInode *inode = &s->inode;
@ -1934,9 +1957,9 @@ static int parse_redundancy(BDRVSheepdogState *s, SheepdogRedundancy *opt)
* # create a erasure coded vdi with x data strips and y parity strips
* -o redundancy=x:y (x must be one of {2,4,8,16} and 1 <= y < SD_EC_MAX_STRIP)
*/
static int parse_redundancy_str(BDRVSheepdogState *s, const char *opt)
static SheepdogRedundancy *parse_redundancy_str(const char *opt)
{
struct SheepdogRedundancy redundancy;
SheepdogRedundancy *redundancy;
const char *n1, *n2;
long copy, parity;
char p[10];
@ -1947,26 +1970,27 @@ static int parse_redundancy_str(BDRVSheepdogState *s, const char *opt)
n2 = strtok(NULL, ":");
if (!n1) {
return -EINVAL;
return NULL;
}
ret = qemu_strtol(n1, NULL, 10, &copy);
if (ret < 0) {
return ret;
return NULL;
}
redundancy = g_new0(SheepdogRedundancy, 1);
if (!n2) {
redundancy = (SheepdogRedundancy) {
*redundancy = (SheepdogRedundancy) {
.type = SHEEPDOG_REDUNDANCY_TYPE_FULL,
.u.full.copies = copy,
};
} else {
ret = qemu_strtol(n2, NULL, 10, &parity);
if (ret < 0) {
return ret;
return NULL;
}
redundancy = (SheepdogRedundancy) {
*redundancy = (SheepdogRedundancy) {
.type = SHEEPDOG_REDUNDANCY_TYPE_ERASURE_CODED,
.u.erasure_coded = {
.data_strips = copy,
@ -1975,17 +1999,19 @@ static int parse_redundancy_str(BDRVSheepdogState *s, const char *opt)
};
}
return parse_redundancy(s, &redundancy);
return redundancy;
}
static int parse_block_size_shift(BDRVSheepdogState *s, QemuOpts *opt)
static int parse_block_size_shift(BDRVSheepdogState *s,
BlockdevCreateOptionsSheepdog *opts)
{
struct SheepdogInode *inode = &s->inode;
uint64_t object_size;
int obj_order;
object_size = qemu_opt_get_size_del(opt, BLOCK_OPT_OBJECT_SIZE, 0);
if (object_size) {
if (opts->has_object_size) {
object_size = opts->object_size;
if ((object_size - 1) & object_size) { /* not a power of 2? */
return -EINVAL;
}
@ -1999,57 +2025,55 @@ static int parse_block_size_shift(BDRVSheepdogState *s, QemuOpts *opt)
return 0;
}
static int coroutine_fn sd_co_create_opts(const char *filename, QemuOpts *opts,
Error **errp)
static int sd_co_create(BlockdevCreateOptions *options, Error **errp)
{
Error *err = NULL;
BlockdevCreateOptionsSheepdog *opts = &options->u.sheepdog;
int ret = 0;
uint32_t vid = 0;
char *backing_file = NULL;
char *buf = NULL;
BDRVSheepdogState *s;
SheepdogConfig cfg;
uint64_t max_vdi_size;
bool prealloc = false;
assert(options->driver == BLOCKDEV_DRIVER_SHEEPDOG);
s = g_new0(BDRVSheepdogState, 1);
if (strstr(filename, "://")) {
sd_parse_uri(&cfg, filename, &err);
} else {
parse_vdiname(&cfg, filename, &err);
}
if (err) {
error_propagate(errp, err);
/* Steal SocketAddress from QAPI, set NULL to prevent double free */
s->addr = opts->location->server;
opts->location->server = NULL;
if (strlen(opts->location->vdi) >= sizeof(s->name)) {
error_setg(errp, "'vdi' string too long");
ret = -EINVAL;
goto out;
}
pstrcpy(s->name, sizeof(s->name), opts->location->vdi);
buf = cfg.port ? g_strdup_printf("%d", cfg.port) : NULL;
s->addr = sd_socket_address(cfg.path, cfg.host, buf);
g_free(buf);
strcpy(s->name, cfg.vdi);
sd_config_done(&cfg);
s->inode.vdi_size = opts->size;
backing_file = opts->backing_file;
s->inode.vdi_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
if (!buf || !strcmp(buf, "off")) {
if (!opts->has_preallocation) {
opts->preallocation = PREALLOC_MODE_OFF;
}
switch (opts->preallocation) {
case PREALLOC_MODE_OFF:
prealloc = false;
} else if (!strcmp(buf, "full")) {
break;
case PREALLOC_MODE_FULL:
prealloc = true;
} else {
error_setg(errp, "Invalid preallocation mode: '%s'", buf);
break;
default:
error_setg(errp, "Preallocation mode not supported for Sheepdog");
ret = -EINVAL;
goto out;
}
g_free(buf);
buf = qemu_opt_get_del(opts, BLOCK_OPT_REDUNDANCY);
if (buf) {
ret = parse_redundancy_str(s, buf);
if (opts->has_redundancy) {
ret = parse_redundancy(s, opts->redundancy);
if (ret < 0) {
error_setg(errp, "Invalid redundancy mode: '%s'", buf);
error_setg(errp, "Invalid redundancy mode");
goto out;
}
}
@ -2061,20 +2085,20 @@ static int coroutine_fn sd_co_create_opts(const char *filename, QemuOpts *opts,
goto out;
}
if (backing_file) {
if (opts->has_backing_file) {
BlockBackend *blk;
BDRVSheepdogState *base;
BlockDriver *drv;
/* Currently, only Sheepdog backing image is supported. */
drv = bdrv_find_protocol(backing_file, true, NULL);
drv = bdrv_find_protocol(opts->backing_file, true, NULL);
if (!drv || strcmp(drv->protocol_name, "sheepdog") != 0) {
error_setg(errp, "backing_file must be a sheepdog image");
ret = -EINVAL;
goto out;
}
blk = blk_new_open(backing_file, NULL, NULL,
blk = blk_new_open(opts->backing_file, NULL, NULL,
BDRV_O_PROTOCOL, errp);
if (blk == NULL) {
ret = -EIO;
@ -2142,28 +2166,96 @@ static int coroutine_fn sd_co_create_opts(const char *filename, QemuOpts *opts,
}
if (prealloc) {
BlockDriverState *bs;
QDict *opts;
opts = qdict_new();
qdict_put_str(opts, "driver", "sheepdog");
bs = bdrv_open(filename, NULL, opts, BDRV_O_PROTOCOL | BDRV_O_RDWR,
errp);
if (!bs) {
goto out;
}
ret = sd_prealloc(bs, 0, s->inode.vdi_size, errp);
bdrv_unref(bs);
ret = sd_create_prealloc(opts->location, opts->size, errp);
}
out:
g_free(backing_file);
g_free(buf);
g_free(s->addr);
g_free(s);
return ret;
}
static int coroutine_fn sd_co_create_opts(const char *filename, QemuOpts *opts,
Error **errp)
{
BlockdevCreateOptions *create_options = NULL;
QDict *qdict, *location_qdict;
QObject *crumpled;
Visitor *v;
const char *redundancy;
Error *local_err = NULL;
int ret;
redundancy = qemu_opt_get_del(opts, BLOCK_OPT_REDUNDANCY);
qdict = qemu_opts_to_qdict(opts, NULL);
qdict_put_str(qdict, "driver", "sheepdog");
location_qdict = qdict_new();
qdict_put(qdict, "location", location_qdict);
sd_parse_filename(filename, location_qdict, &local_err);
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
}
qdict_flatten(qdict);
/* Change legacy command line options into QMP ones */
static const QDictRenames opt_renames[] = {
{ BLOCK_OPT_BACKING_FILE, "backing-file" },
{ BLOCK_OPT_OBJECT_SIZE, "object-size" },
{ NULL, NULL },
};
if (!qdict_rename_keys(qdict, opt_renames, errp)) {
ret = -EINVAL;
goto fail;
}
/* Get the QAPI object */
crumpled = qdict_crumple(qdict, errp);
if (crumpled == NULL) {
ret = -EINVAL;
goto fail;
}
v = qobject_input_visitor_new_keyval(crumpled);
visit_type_BlockdevCreateOptions(v, NULL, &create_options, &local_err);
visit_free(v);
qobject_decref(crumpled);
if (local_err) {
error_propagate(errp, local_err);
ret = -EINVAL;
goto fail;
}
assert(create_options->driver == BLOCKDEV_DRIVER_SHEEPDOG);
create_options->u.sheepdog.size =
ROUND_UP(create_options->u.sheepdog.size, BDRV_SECTOR_SIZE);
if (redundancy) {
create_options->u.sheepdog.has_redundancy = true;
create_options->u.sheepdog.redundancy =
parse_redundancy_str(redundancy);
if (create_options->u.sheepdog.redundancy == NULL) {
error_setg(errp, "Invalid redundancy mode");
ret = -EINVAL;
goto fail;
}
}
ret = sd_co_create(create_options, errp);
fail:
qapi_free_BlockdevCreateOptions(create_options);
QDECREF(qdict);
return ret;
}
static void sd_close(BlockDriverState *bs)
{
Error *local_err = NULL;
@ -3143,6 +3235,7 @@ static BlockDriver bdrv_sheepdog = {
.bdrv_reopen_commit = sd_reopen_commit,
.bdrv_reopen_abort = sd_reopen_abort,
.bdrv_close = sd_close,
.bdrv_co_create = sd_co_create,
.bdrv_co_create_opts = sd_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_getlength = sd_getlength,
@ -3179,6 +3272,7 @@ static BlockDriver bdrv_sheepdog_tcp = {
.bdrv_reopen_commit = sd_reopen_commit,
.bdrv_reopen_abort = sd_reopen_abort,
.bdrv_close = sd_close,
.bdrv_co_create = sd_co_create,
.bdrv_co_create_opts = sd_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_getlength = sd_getlength,
@ -3215,6 +3309,7 @@ static BlockDriver bdrv_sheepdog_unix = {
.bdrv_reopen_commit = sd_reopen_commit,
.bdrv_reopen_abort = sd_reopen_abort,
.bdrv_close = sd_close,
.bdrv_co_create = sd_co_create,
.bdrv_co_create_opts = sd_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_getlength = sd_getlength,

24
qapi/block-core.json
View File

@ -3511,6 +3511,28 @@
'data': { 'full': 'SheepdogRedundancyFull',
'erasure-coded': 'SheepdogRedundancyErasureCoded' } }
##
# @BlockdevCreateOptionsSheepdog:
#
# Driver specific image creation options for Sheepdog.
#
# @location Where to store the new image file
# @size Size of the virtual disk in bytes
# @backing-file File name of a base image
# @preallocation Preallocation mode (allowed values: off, full)
# @redundancy Redundancy of the image
# @object-size Object size of the image
#
# Since: 2.12
##
{ 'struct': 'BlockdevCreateOptionsSheepdog',
'data': { 'location': 'BlockdevOptionsSheepdog',
'size': 'size',
'*backing-file': 'str',
'*preallocation': 'PreallocMode',
'*redundancy': 'SheepdogRedundancy',
'*object-size': 'size' } }
##
# @BlockdevCreateNotSupported:
#
@ -3562,7 +3584,7 @@
'raw': 'BlockdevCreateNotSupported',
'rbd': 'BlockdevCreateOptionsRbd',
'replication': 'BlockdevCreateNotSupported',
'sheepdog': 'BlockdevCreateNotSupported',
'sheepdog': 'BlockdevCreateOptionsSheepdog',
'ssh': 'BlockdevCreateNotSupported',
'throttle': 'BlockdevCreateNotSupported',
'vdi': 'BlockdevCreateNotSupported',