izzy/xemu
0
0
Fork 0
mirror of https://github.com/izzy2lost/xemu.git synced 2026-07-06 00:20:22 -07:00
Code Issues Packages Projects Releases Wiki Activity

Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

Browse Source 
# gpg: Signature made Mon 22 Sep 2014 12:41:59 BST using RSA key ID 81AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"

* remotes/stefanha/tags/block-pull-request: (59 commits)
  block: Always compile virtio-blk dataplane
  vring: Better error handling if num is too large
  virtio: Import virtio_vring.h
  async: aio_context_new(): Handle event_notifier_init failure
  block: vhdx - fix reading beyond pointer during image creation
  block: delete cow block driver
  block/archipelago: Fix typo in qemu_archipelago_truncate()
  ahci: Add test_identify case to ahci-test.
  ahci: Add test_hba_enable to ahci-test.
  ahci: Add test_hba_spec to ahci-test.
  ahci: properly shadow the TFD register
  ahci: add test_pci_enable to ahci-test.
  ahci: Add test_pci_spec to ahci-test.
  ahci: MSI capability should be at 0x80, not 0x50.
  ahci: Adding basic functionality qtest.
  layout: Add generators for refcount table and blocks
  fuzz: Add fuzzing functions for entries of refcount table and blocks
  docs: List all image elements currently supported by the fuzzer
  qapi/block-core: Add "new" qcow2 options
  qcow2: Add overlap-check.template option
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell
2014-09-23 12:08:55 +01:00
parent 17336812c7 52b53c04fa
commit 380f649e02
72 changed files with 2810 additions and 950 deletions
Download Patch File Download Diff File Expand all files Collapse all files
aio-win32.c
+3 -5
View File
@@ -283,9 +283,9 @@ bool aio_poll(AioContext *ctx, bool blocking)
int count;
int timeout;
if (aio_prepare(ctx)) {
have_select_revents = aio_prepare(ctx);
if (have_select_revents) {
blocking = false;
have_select_revents = true;
}
was_dispatching = ctx->dispatching;
@@ -335,6 +335,7 @@ bool aio_poll(AioContext *ctx, bool blocking)
event = NULL;
if ((DWORD) (ret - WAIT_OBJECT_0) < count) {
event = events[ret - WAIT_OBJECT_0];
events[ret - WAIT_OBJECT_0] = events[--count];
} else if (!have_select_revents) {
break;
}
@@ -343,9 +344,6 @@ bool aio_poll(AioContext *ctx, bool blocking)
blocking = false;
progress |= aio_dispatch_handlers(ctx, event);
/* Try again, but only call each handler once. */
events[ret - WAIT_OBJECT_0] = events[--count];
}
progress |= timerlistgroup_run_timers(&ctx->tlg);
async.c
+11 -5
View File
@@ -289,18 +289,24 @@ static void aio_rfifolock_cb(void *opaque)
aio_notify(opaque);
}
AioContext *aio_context_new(void)
AioContext *aio_context_new(Error **errp)
{
int ret;
AioContext *ctx;
ctx = (AioContext *) g_source_new(&aio_source_funcs, sizeof(AioContext));
ret = event_notifier_init(&ctx->notifier, false);
if (ret < 0) {
g_source_destroy(&ctx->source);
error_setg_errno(errp, -ret, "Failed to initialize event notifier");
return NULL;
}
aio_set_event_notifier(ctx, &ctx->notifier,
(EventNotifierHandler *)
event_notifier_test_and_clear);
ctx->pollfds = g_array_new(FALSE, FALSE, sizeof(GPollFD));
ctx->thread_pool = NULL;
qemu_mutex_init(&ctx->bh_lock);
rfifolock_init(&ctx->lock, aio_rfifolock_cb, ctx);
event_notifier_init(&ctx->notifier, false);
aio_set_event_notifier(ctx, &ctx->notifier,
(EventNotifierHandler *)
event_notifier_test_and_clear);
timerlistgroup_init(&ctx->tlg, aio_timerlist_notify, ctx);
return ctx;
block.c
+36 -36
View File
@@ -4640,7 +4640,28 @@ int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs)
void bdrv_aio_cancel(BlockDriverAIOCB *acb)
{
acb->aiocb_info->cancel(acb);
qemu_aio_ref(acb);
bdrv_aio_cancel_async(acb);
while (acb->refcnt > 1) {
if (acb->aiocb_info->get_aio_context) {
aio_poll(acb->aiocb_info->get_aio_context(acb), true);
} else if (acb->bs) {
aio_poll(bdrv_get_aio_context(acb->bs), true);
} else {
abort();
}
}
qemu_aio_unref(acb);
}
/* Async version of aio cancel. The caller is not blocked if the acb implements
* cancel_async, otherwise we do nothing and let the request normally complete.
* In either case the completion callback must be called. */
void bdrv_aio_cancel_async(BlockDriverAIOCB *acb)
{
if (acb->aiocb_info->cancel_async) {
acb->aiocb_info->cancel_async(acb);
}
}
/**************************************************************/
@@ -4656,18 +4677,8 @@ typedef struct BlockDriverAIOCBSync {
int is_write;
} BlockDriverAIOCBSync;
static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb)
{
BlockDriverAIOCBSync *acb =
container_of(blockacb, BlockDriverAIOCBSync, common);
qemu_bh_delete(acb->bh);
acb->bh = NULL;
qemu_aio_release(acb);
}
static const AIOCBInfo bdrv_em_aiocb_info = {
.aiocb_size = sizeof(BlockDriverAIOCBSync),
.cancel = bdrv_aio_cancel_em,
};
static void bdrv_aio_bh_cb(void *opaque)
@@ -4681,7 +4692,7 @@ static void bdrv_aio_bh_cb(void *opaque)
acb->common.cb(acb->common.opaque, acb->ret);
qemu_bh_delete(acb->bh);
acb->bh = NULL;
qemu_aio_release(acb);
qemu_aio_unref(acb);
}
static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
@@ -4738,22 +4749,8 @@ typedef struct BlockDriverAIOCBCoroutine {
QEMUBH* bh;
} BlockDriverAIOCBCoroutine;
static void bdrv_aio_co_cancel_em(BlockDriverAIOCB *blockacb)
{
AioContext *aio_context = bdrv_get_aio_context(blockacb->bs);
BlockDriverAIOCBCoroutine *acb =
container_of(blockacb, BlockDriverAIOCBCoroutine, common);
bool done = false;
acb->done = &done;
while (!done) {
aio_poll(aio_context, true);
}
}
static const AIOCBInfo bdrv_em_co_aiocb_info = {
.aiocb_size = sizeof(BlockDriverAIOCBCoroutine),
.cancel = bdrv_aio_co_cancel_em,
};
static void bdrv_co_em_bh(void *opaque)
@@ -4762,12 +4759,8 @@ static void bdrv_co_em_bh(void *opaque)
acb->common.cb(acb->common.opaque, acb->req.error);
if (acb->done) {
*acb->done = true;
}
qemu_bh_delete(acb->bh);
qemu_aio_release(acb);
qemu_aio_unref(acb);
}
/* Invoke bdrv_co_do_readv/bdrv_co_do_writev */
@@ -4806,7 +4799,6 @@ static BlockDriverAIOCB *bdrv_co_aio_rw_vector(BlockDriverState *bs,
acb->req.qiov = qiov;
acb->req.flags = flags;
acb->is_write = is_write;
acb->done = NULL;
co = qemu_coroutine_create(bdrv_co_do_rw);
qemu_coroutine_enter(co, acb);
@@ -4833,7 +4825,6 @@ BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs,
BlockDriverAIOCBCoroutine *acb;
acb = qemu_aio_get(&bdrv_em_co_aiocb_info, bs, cb, opaque);
acb->done = NULL;
co = qemu_coroutine_create(bdrv_aio_flush_co_entry);
qemu_coroutine_enter(co, acb);
@@ -4863,7 +4854,6 @@ BlockDriverAIOCB *bdrv_aio_discard(BlockDriverState *bs,
acb = qemu_aio_get(&bdrv_em_co_aiocb_info, bs, cb, opaque);
acb->req.sector = sector_num;
acb->req.nb_sectors = nb_sectors;
acb->done = NULL;
co = qemu_coroutine_create(bdrv_aio_discard_co_entry);
qemu_coroutine_enter(co, acb);
@@ -4891,13 +4881,23 @@ void *qemu_aio_get(const AIOCBInfo *aiocb_info, BlockDriverState *bs,
acb->bs = bs;
acb->cb = cb;
acb->opaque = opaque;
acb->refcnt = 1;
return acb;
}
void qemu_aio_release(void *p)
void qemu_aio_ref(void *p)
{
BlockDriverAIOCB *acb = p;
g_slice_free1(acb->aiocb_info->aiocb_size, acb);
acb->refcnt++;
}
void qemu_aio_unref(void *p)
{
BlockDriverAIOCB *acb = p;
assert(acb->refcnt > 0);
if (--acb->refcnt == 0) {
g_slice_free1(acb->aiocb_info->aiocb_size, acb);
}
}
/**************************************************************/
block/Makefile.objs
+2 -1
View File
@@ -1,4 +1,4 @@
block-obj-y += raw_bsd.o cow.o qcow.o vdi.o vmdk.o cloop.o dmg.o bochs.o vpc.o vvfat.o
block-obj-y += raw_bsd.o qcow.o vdi.o vmdk.o cloop.o dmg.o bochs.o vpc.o vvfat.o
block-obj-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o qcow2-cache.o
block-obj-y += qed.o qed-gencb.o qed-l2-cache.o qed-table.o qed-cluster.o
block-obj-y += qed-check.o
@@ -9,6 +9,7 @@ block-obj-y += snapshot.o qapi.o
block-obj-$(CONFIG_WIN32) += raw-win32.o win32-aio.o
block-obj-$(CONFIG_POSIX) += raw-posix.o
block-obj-$(CONFIG_LINUX_AIO) += linux-aio.o
block-obj-y += null.o
block-obj-y += nbd.o nbd-client.o sheepdog.o
block-obj-$(CONFIG_LIBISCSI) += iscsi.o
block/archipelago.c
+3 -18
View File
@@ -91,7 +91,6 @@ typedef struct ArchipelagoAIOCB {
struct BDRVArchipelagoState *s;
QEMUIOVector *qiov;
ARCHIPCmd cmd;
bool cancelled;
int status;
int64_t size;
int64_t ret;
@@ -318,9 +317,7 @@ static void qemu_archipelago_complete_aio(void *opaque)
aio_cb->common.cb(aio_cb->common.opaque, aio_cb->ret);
aio_cb->status = 0;
if (!aio_cb->cancelled) {
qemu_aio_release(aio_cb);
}
qemu_aio_unref(aio_cb);
g_free(reqdata);
}
@@ -725,19 +722,8 @@ static int qemu_archipelago_create(const char *filename,
return ret;
}
static void qemu_archipelago_aio_cancel(BlockDriverAIOCB *blockacb)
{
ArchipelagoAIOCB *aio_cb = (ArchipelagoAIOCB *) blockacb;
aio_cb->cancelled = true;
while (aio_cb->status == -EINPROGRESS) {
aio_poll(bdrv_get_aio_context(aio_cb->common.bs), true);
}
qemu_aio_release(aio_cb);
}
static const AIOCBInfo archipelago_aiocb_info = {
.aiocb_size = sizeof(ArchipelagoAIOCB),
.cancel = qemu_archipelago_aio_cancel,
};
static int archipelago_submit_request(BDRVArchipelagoState *s,
@@ -889,7 +875,6 @@ static BlockDriverAIOCB *qemu_archipelago_aio_rw(BlockDriverState *bs,
aio_cb->ret = 0;
aio_cb->s = s;
aio_cb->cancelled = false;
aio_cb->status = -EINPROGRESS;
off = sector_num * BDRV_SECTOR_SIZE;
@@ -905,7 +890,7 @@ static BlockDriverAIOCB *qemu_archipelago_aio_rw(BlockDriverState *bs,
err_exit:
error_report("qemu_archipelago_aio_rw(): I/O Error\n");
qemu_aio_release(aio_cb);
qemu_aio_unref(aio_cb);
return NULL;
}
@@ -1008,7 +993,7 @@ static int qemu_archipelago_truncate(BlockDriverState *bs, int64_t offset)
req = xseg_get_request(s->xseg, s->srcport, s->mportno, X_ALLOC);
if (!req) {
archipelagolog("Cannot get XSEG request\n");
return err_exit2;
goto err_exit2;
}
ret = xseg_prep_request(s->xseg, req, targetlen, 0);
block/blkdebug.c
+2 -15
View File
@@ -52,11 +52,8 @@ typedef struct BlkdebugSuspendedReq {
QLIST_ENTRY(BlkdebugSuspendedReq) next;
} BlkdebugSuspendedReq;
static void blkdebug_aio_cancel(BlockDriverAIOCB *blockacb);
static const AIOCBInfo blkdebug_aiocb_info = {
.aiocb_size = sizeof(BlkdebugAIOCB),
.cancel = blkdebug_aio_cancel,
.aiocb_size = sizeof(BlkdebugAIOCB),
};
enum {
@@ -447,17 +444,7 @@ static void error_callback_bh(void *opaque)
struct BlkdebugAIOCB *acb = opaque;
qemu_bh_delete(acb->bh);
acb->common.cb(acb->common.opaque, acb->ret);
qemu_aio_release(acb);
}
static void blkdebug_aio_cancel(BlockDriverAIOCB *blockacb)
{
BlkdebugAIOCB *acb = container_of(blockacb, BlkdebugAIOCB, common);
if (acb->bh) {
qemu_bh_delete(acb->bh);
acb->bh = NULL;
}
qemu_aio_release(acb);
qemu_aio_unref(acb);
}
static BlockDriverAIOCB *inject_error(BlockDriverState *bs,
block/blkverify.c
+1 -20
View File
@@ -29,7 +29,6 @@ struct BlkverifyAIOCB {
int ret; /* first completed request's result */
unsigned int done; /* completion counter */
bool *finished; /* completion signal for cancel */
QEMUIOVector *qiov; /* user I/O vector */
QEMUIOVector raw_qiov; /* cloned I/O vector for raw file */
@@ -38,22 +37,8 @@ struct BlkverifyAIOCB {
void (*verify)(BlkverifyAIOCB *acb);
};
static void blkverify_aio_cancel(BlockDriverAIOCB *blockacb)
{
BlkverifyAIOCB *acb = (BlkverifyAIOCB *)blockacb;
AioContext *aio_context = bdrv_get_aio_context(blockacb->bs);
bool finished = false;
/* Wait until request completes, invokes its callback, and frees itself */
acb->finished = &finished;
while (!finished) {
aio_poll(aio_context, true);
}
}
static const AIOCBInfo blkverify_aiocb_info = {
.aiocb_size = sizeof(BlkverifyAIOCB),
.cancel = blkverify_aio_cancel,
};
static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb,
@@ -194,7 +179,6 @@ static BlkverifyAIOCB *blkverify_aio_get(BlockDriverState *bs, bool is_write,
acb->qiov = qiov;
acb->buf = NULL;
acb->verify = NULL;
acb->finished = NULL;
return acb;
}
@@ -208,10 +192,7 @@ static void blkverify_aio_bh(void *opaque)
qemu_vfree(acb->buf);
}
acb->common.cb(acb->common.opaque, acb->ret);
if (acb->finished) {
*acb->finished = true;
}
qemu_aio_release(acb);
qemu_aio_unref(acb);
}
static void blkverify_aio_cb(void *opaque, int ret)
block/cow.c
-433
View File
@@ -1,433 +0,0 @@
/*
* Block driver for the COW format
*
* Copyright (c) 2004 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
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu-common.h"
#include "block/block_int.h"
#include "qemu/module.h"
/**************************************************************/
/* COW block driver using file system holes */
/* user mode linux compatible COW file */
#define COW_MAGIC 0x4f4f4f4d /* MOOO */
#define COW_VERSION 2
struct cow_header_v2 {
uint32_t magic;
uint32_t version;
char backing_file[1024];
int32_t mtime;
uint64_t size;
uint32_t sectorsize;
};
typedef struct BDRVCowState {
CoMutex lock;
int64_t cow_sectors_offset;
} BDRVCowState;
static int cow_probe(const uint8_t *buf, int buf_size, const char *filename)
{
const struct cow_header_v2 *cow_header = (const void *)buf;
if (buf_size >= sizeof(struct cow_header_v2) &&
be32_to_cpu(cow_header->magic) == COW_MAGIC &&
be32_to_cpu(cow_header->version) == COW_VERSION)
return 100;
else
return 0;
}
static int cow_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVCowState *s = bs->opaque;
struct cow_header_v2 cow_header;
int bitmap_size;
int64_t size;
int ret;
/* see if it is a cow image */
ret = bdrv_pread(bs->file, 0, &cow_header, sizeof(cow_header));
if (ret < 0) {
goto fail;
}
if (be32_to_cpu(cow_header.magic) != COW_MAGIC) {
error_setg(errp, "Image not in COW format");
ret = -EINVAL;
goto fail;
}
if (be32_to_cpu(cow_header.version) != COW_VERSION) {
char version[64];
snprintf(version, sizeof(version),
"COW version %" PRIu32, cow_header.version);
error_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
bs->device_name, "cow", version);
ret = -ENOTSUP;
goto fail;
}
/* cow image found */
size = be64_to_cpu(cow_header.size);
bs->total_sectors = size / 512;
pstrcpy(bs->backing_file, sizeof(bs->backing_file),
cow_header.backing_file);
bitmap_size = ((bs->total_sectors + 7) >> 3) + sizeof(cow_header);
s->cow_sectors_offset = (bitmap_size + 511) & ~511;
qemu_co_mutex_init(&s->lock);
return 0;
fail:
return ret;
}
static inline void cow_set_bits(uint8_t *bitmap, int start, int64_t nb_sectors)
{
int64_t bitnum = start, last = start + nb_sectors;
while (bitnum < last) {
if ((bitnum & 7) == 0 && bitnum + 8 <= last) {
bitmap[bitnum / 8] = 0xFF;
bitnum += 8;
continue;
}
bitmap[bitnum/8] |= (1 << (bitnum % 8));
bitnum++;
}
}
#define BITS_PER_BITMAP_SECTOR (512 * 8)
/* Cannot use bitmap.c on big-endian machines. */
static int cow_test_bit(int64_t bitnum, const uint8_t *bitmap)
{
return (bitmap[bitnum / 8] & (1 << (bitnum & 7))) != 0;
}
static int cow_find_streak(const uint8_t *bitmap, int value, int start, int nb_sectors)
{
int streak_value = value ? 0xFF : 0;
int last = MIN(start + nb_sectors, BITS_PER_BITMAP_SECTOR);
int bitnum = start;
while (bitnum < last) {
if ((bitnum & 7) == 0 && bitmap[bitnum / 8] == streak_value) {
bitnum += 8;
continue;
}
if (cow_test_bit(bitnum, bitmap) == value) {
bitnum++;
continue;
}
break;
}
return MIN(bitnum, last) - start;
}
/* Return true if first block has been changed (ie. current version is
* in COW file). Set the number of continuous blocks for which that
* is true. */
static int coroutine_fn cow_co_is_allocated(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *num_same)
{
int64_t bitnum = sector_num + sizeof(struct cow_header_v2) * 8;
uint64_t offset = (bitnum / 8) & -BDRV_SECTOR_SIZE;
bool first = true;
int changed = 0, same = 0;
do {
int ret;
uint8_t bitmap[BDRV_SECTOR_SIZE];
bitnum &= BITS_PER_BITMAP_SECTOR - 1;
int sector_bits = MIN(nb_sectors, BITS_PER_BITMAP_SECTOR - bitnum);
ret = bdrv_pread(bs->file, offset, &bitmap, sizeof(bitmap));
if (ret < 0) {
return ret;
}
if (first) {
changed = cow_test_bit(bitnum, bitmap);
first = false;
}
same += cow_find_streak(bitmap, changed, bitnum, nb_sectors);
bitnum += sector_bits;
nb_sectors -= sector_bits;
offset += BDRV_SECTOR_SIZE;
} while (nb_sectors);
*num_same = same;
return changed;
}
static int64_t coroutine_fn cow_co_get_block_status(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *num_same)
{
BDRVCowState *s = bs->opaque;
int ret = cow_co_is_allocated(bs, sector_num, nb_sectors, num_same);
int64_t offset = s->cow_sectors_offset + (sector_num << BDRV_SECTOR_BITS);
if (ret < 0) {
return ret;
}
return (ret ? BDRV_BLOCK_DATA : 0) | offset | BDRV_BLOCK_OFFSET_VALID;
}
static int cow_update_bitmap(BlockDriverState *bs, int64_t sector_num,
int nb_sectors)
{
int64_t bitnum = sector_num + sizeof(struct cow_header_v2) * 8;
uint64_t offset = (bitnum / 8) & -BDRV_SECTOR_SIZE;
bool first = true;
int sector_bits;
for ( ; nb_sectors;
bitnum += sector_bits,
nb_sectors -= sector_bits,
offset += BDRV_SECTOR_SIZE) {
int ret, set;
uint8_t bitmap[BDRV_SECTOR_SIZE];
bitnum &= BITS_PER_BITMAP_SECTOR - 1;
sector_bits = MIN(nb_sectors, BITS_PER_BITMAP_SECTOR - bitnum);
ret = bdrv_pread(bs->file, offset, &bitmap, sizeof(bitmap));
if (ret < 0) {
return ret;
}
/* Skip over any already set bits */
set = cow_find_streak(bitmap, 1, bitnum, sector_bits);
bitnum += set;
sector_bits -= set;
nb_sectors -= set;
if (!sector_bits) {
continue;
}
if (first) {
ret = bdrv_flush(bs->file);
if (ret < 0) {
return ret;
}
first = false;
}
cow_set_bits(bitmap, bitnum, sector_bits);
ret = bdrv_pwrite(bs->file, offset, &bitmap, sizeof(bitmap));
if (ret < 0) {
return ret;
}
}
return 0;
}
static int coroutine_fn cow_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
BDRVCowState *s = bs->opaque;
int ret, n;
while (nb_sectors > 0) {
ret = cow_co_is_allocated(bs, sector_num, nb_sectors, &n);
if (ret < 0) {
return ret;
}
if (ret) {
ret = bdrv_pread(bs->file,
s->cow_sectors_offset + sector_num * 512,
buf, n * 512);
if (ret < 0) {
return ret;
}
} else {
if (bs->backing_hd) {
/* read from the base image */
ret = bdrv_read(bs->backing_hd, sector_num, buf, n);
if (ret < 0) {
return ret;
}
} else {
memset(buf, 0, n * 512);
}
}
nb_sectors -= n;
sector_num += n;
buf += n * 512;
}
return 0;
}
static coroutine_fn int cow_co_read(BlockDriverState *bs, int64_t sector_num,
uint8_t *buf, int nb_sectors)
{
int ret;
BDRVCowState *s = bs->opaque;
qemu_co_mutex_lock(&s->lock);
ret = cow_read(bs, sector_num, buf, nb_sectors);
qemu_co_mutex_unlock(&s->lock);
return ret;
}
static int cow_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
BDRVCowState *s = bs->opaque;
int ret;
ret = bdrv_pwrite(bs->file, s->cow_sectors_offset + sector_num * 512,
buf, nb_sectors * 512);
if (ret < 0) {
return ret;
}
return cow_update_bitmap(bs, sector_num, nb_sectors);
}
static coroutine_fn int cow_co_write(BlockDriverState *bs, int64_t sector_num,
const uint8_t *buf, int nb_sectors)
{
int ret;
BDRVCowState *s = bs->opaque;
qemu_co_mutex_lock(&s->lock);
ret = cow_write(bs, sector_num, buf, nb_sectors);
qemu_co_mutex_unlock(&s->lock);
return ret;
}
static void cow_close(BlockDriverState *bs)
{
}
static int cow_create(const char *filename, QemuOpts *opts, Error **errp)
{
struct cow_header_v2 cow_header;
struct stat st;
int64_t image_sectors = 0;
char *image_filename = NULL;
Error *local_err = NULL;
int ret;
BlockDriverState *cow_bs = NULL;
/* Read out options */
image_sectors = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
image_filename = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE);
ret = bdrv_create_file(filename, opts, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto exit;
}
ret = bdrv_open(&cow_bs, filename, NULL, NULL,
BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto exit;
}
memset(&cow_header, 0, sizeof(cow_header));
cow_header.magic = cpu_to_be32(COW_MAGIC);
cow_header.version = cpu_to_be32(COW_VERSION);
if (image_filename) {
/* Note: if no file, we put a dummy mtime */
cow_header.mtime = cpu_to_be32(0);
if (stat(image_filename, &st) != 0) {
goto mtime_fail;
}
cow_header.mtime = cpu_to_be32(st.st_mtime);
mtime_fail:
pstrcpy(cow_header.backing_file, sizeof(cow_header.backing_file),
image_filename);
}
cow_header.sectorsize = cpu_to_be32(512);
cow_header.size = cpu_to_be64(image_sectors * 512);
ret = bdrv_pwrite(cow_bs, 0, &cow_header, sizeof(cow_header));
if (ret < 0) {
goto exit;
}
/* resize to include at least all the bitmap */
ret = bdrv_truncate(cow_bs,
sizeof(cow_header) + ((image_sectors + 7) >> 3));
if (ret < 0) {
goto exit;
}
exit:
g_free(image_filename);
if (cow_bs) {
bdrv_unref(cow_bs);
}
return ret;
}
static QemuOptsList cow_create_opts = {
.name = "cow-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(cow_create_opts.head),
.desc = {
{
.name = BLOCK_OPT_SIZE,
.type = QEMU_OPT_SIZE,
.help = "Virtual disk size"
},
{
.name = BLOCK_OPT_BACKING_FILE,
.type = QEMU_OPT_STRING,
.help = "File name of a base image"
},
{ /* end of list */ }
}
};
static BlockDriver bdrv_cow = {
.format_name = "cow",
.instance_size = sizeof(BDRVCowState),
.bdrv_probe = cow_probe,
.bdrv_open = cow_open,
.bdrv_close = cow_close,
.bdrv_create = cow_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.supports_backing = true,
.bdrv_read = cow_co_read,
.bdrv_write = cow_co_write,
.bdrv_co_get_block_status = cow_co_get_block_status,
.create_opts = &cow_create_opts,
};
static void bdrv_cow_init(void)
{
bdrv_register(&bdrv_cow);
}
block_init(bdrv_cow_init);
block/curl.c
+5 -11
View File
@@ -212,7 +212,7 @@ static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
qemu_iovec_from_buf(acb->qiov, 0, s->orig_buf + acb->start,
acb->end - acb->start);
acb->common.cb(acb->common.opaque, 0);
qemu_aio_release(acb);
qemu_aio_unref(acb);
s->acb[i] = NULL;
}
}
@@ -304,7 +304,7 @@ static void curl_multi_check_completion(BDRVCURLState *s)
}
acb->common.cb(acb->common.opaque, -EIO);
qemu_aio_release(acb);
qemu_aio_unref(acb);
state->acb[i] = NULL;
}
}
@@ -613,14 +613,8 @@ out_noclean:
return -EINVAL;
}
static void curl_aio_cancel(BlockDriverAIOCB *blockacb)
{
// Do we have to implement canceling? Seems to work without...
}
static const AIOCBInfo curl_aiocb_info = {
.aiocb_size = sizeof(CURLAIOCB),
.cancel = curl_aio_cancel,
};
@@ -642,7 +636,7 @@ static void curl_readv_bh_cb(void *p)
// we can just call the callback and be done.
switch (curl_find_buf(s, start, acb->nb_sectors * SECTOR_SIZE, acb)) {
case FIND_RET_OK:
qemu_aio_release(acb);
qemu_aio_unref(acb);
// fall through
case FIND_RET_WAIT:
return;
@@ -654,7 +648,7 @@ static void curl_readv_bh_cb(void *p)
state = curl_init_state(acb->common.bs, s);
if (!state) {
acb->common.cb(acb->common.opaque, -EIO);
qemu_aio_release(acb);
qemu_aio_unref(acb);
return;
}
@@ -670,7 +664,7 @@ static void curl_readv_bh_cb(void *p)
if (state->buf_len && state->orig_buf == NULL) {
curl_clean_state(state);
acb->common.cb(acb->common.opaque, -ENOMEM);
qemu_aio_release(acb);
qemu_aio_unref(acb);
return;
}
state->acb[0] = acb;
block/iscsi.c
+5 -18
View File
@@ -88,7 +88,6 @@ typedef struct IscsiAIOCB {
struct scsi_task *task;
uint8_t *buf;
int status;
int canceled;
int64_t sector_num;
int nb_sectors;
#ifdef __linux__
@@ -120,16 +119,14 @@ iscsi_bh_cb(void *p)
g_free(acb->buf);
acb->buf = NULL;
if (acb->canceled == 0) {
acb->common.cb(acb->common.opaque, acb->status);
}
acb->common.cb(acb->common.opaque, acb->status);
if (acb->task != NULL) {
scsi_free_scsi_task(acb->task);
acb->task = NULL;
}
qemu_aio_release(acb);
qemu_aio_unref(acb);
}
static void
@@ -240,20 +237,15 @@ iscsi_aio_cancel(BlockDriverAIOCB *blockacb)
return;
}
acb->canceled = 1;
/* send a task mgmt call to the target to cancel the task on the target */
iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task,
iscsi_abort_task_cb, acb);
while (acb->status == -EINPROGRESS) {
aio_poll(iscsilun->aio_context, true);
}
}
static const AIOCBInfo iscsi_aiocb_info = {
.aiocb_size = sizeof(IscsiAIOCB),
.cancel = iscsi_aio_cancel,
.cancel_async = iscsi_aio_cancel,
};
@@ -638,10 +630,6 @@ iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status,
g_free(acb->buf);
acb->buf = NULL;
if (acb->canceled != 0) {
return;
}
acb->status = 0;
if (status < 0) {
error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
@@ -683,7 +671,6 @@ static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque);
acb->iscsilun = iscsilun;
acb->canceled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
acb->buf = NULL;
@@ -693,7 +680,7 @@ static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
if (acb->task == NULL) {
error_report("iSCSI: Failed to allocate task for scsi command. %s",
iscsi_get_error(iscsi));
qemu_aio_release(acb);
qemu_aio_unref(acb);
return NULL;
}
memset(acb->task, 0, sizeof(struct scsi_task));
@@ -731,7 +718,7 @@ static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
(data.size > 0) ? &data : NULL,
acb) != 0) {
scsi_free_scsi_task(acb->task);
qemu_aio_release(acb);
qemu_aio_unref(acb);
return NULL;
}
block/linux-aio.c
+10 -24
View File
@@ -85,11 +85,10 @@ static void qemu_laio_process_completion(struct qemu_laio_state *s,
ret = -EINVAL;
}
}
laiocb->common.cb(laiocb->common.opaque, ret);
}
laiocb->common.cb(laiocb->common.opaque, ret);
qemu_aio_release(laiocb);
qemu_aio_unref(laiocb);
}
/* The completion BH fetches completed I/O requests and invokes their
@@ -153,35 +152,22 @@ static void laio_cancel(BlockDriverAIOCB *blockacb)
struct io_event event;
int ret;
if (laiocb->ret != -EINPROGRESS)
if (laiocb->ret != -EINPROGRESS) {
return;
/*
* Note that as of Linux 2.6.31 neither the block device code nor any
* filesystem implements cancellation of AIO request.
* Thus the polling loop below is the normal code path.
*/
}
ret = io_cancel(laiocb->ctx->ctx, &laiocb->iocb, &event);
if (ret == 0) {
laiocb->ret = -ECANCELED;
laiocb->ret = -ECANCELED;
if (ret != 0) {
/* iocb is not cancelled, cb will be called by the event loop later */
return;
}
/*
* We have to wait for the iocb to finish.
*
* The only way to get the iocb status update is by polling the io context.
* We might be able to do this slightly more optimal by removing the
* O_NONBLOCK flag.
*/
while (laiocb->ret == -EINPROGRESS) {
qemu_laio_completion_cb(&laiocb->ctx->e);
}
laiocb->common.cb(laiocb->common.opaque, laiocb->ret);
}
static const AIOCBInfo laio_aiocb_info = {
.aiocb_size = sizeof(struct qemu_laiocb),
.cancel = laio_cancel,
.cancel_async = laio_cancel,
};
static void ioq_init(LaioQueue *io_q)
@@ -300,7 +286,7 @@ BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
return &laiocb->common;
out_free_aiocb:
qemu_aio_release(laiocb);
qemu_aio_unref(laiocb);
return NULL;
}
block/null.c
+168
View File
@@ -0,0 +1,168 @@
/*
* Null block driver
*
* Authors:
* Fam Zheng <famz@redhat.com>
*
* Copyright (C) 2014 Red Hat, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "block/block_int.h"
typedef struct {
int64_t length;
} BDRVNullState;
static QemuOptsList runtime_opts = {
.name = "null",
.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
.desc = {
{
.name = "filename",
.type = QEMU_OPT_STRING,
.help = "",
},
{
.name = BLOCK_OPT_SIZE,
.type = QEMU_OPT_SIZE,
.help = "size of the null block",
},
{ /* end of list */ }
},
};
static int null_file_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
QemuOpts *opts;
BDRVNullState *s = bs->opaque;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &error_abort);
s->length =
qemu_opt_get_size(opts, BLOCK_OPT_SIZE, 1 << 30);
qemu_opts_del(opts);
return 0;
}
static void null_close(BlockDriverState *bs)
{
}
static int64_t null_getlength(BlockDriverState *bs)
{
BDRVNullState *s = bs->opaque;
return s->length;
}
static coroutine_fn int null_co_readv(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
QEMUIOVector *qiov)
{
return 0;
}
static coroutine_fn int null_co_writev(BlockDriverState *bs,
int64_t sector_num, int nb_sectors,
QEMUIOVector *qiov)
{
return 0;
}
static coroutine_fn int null_co_flush(BlockDriverState *bs)
{
return 0;
}
typedef struct {
BlockDriverAIOCB common;
QEMUBH *bh;
} NullAIOCB;
static const AIOCBInfo null_aiocb_info = {
.aiocb_size = sizeof(NullAIOCB),
};
static void null_bh_cb(void *opaque)
{
NullAIOCB *acb = opaque;
acb->common.cb(acb->common.opaque, 0);
qemu_bh_delete(acb->bh);
qemu_aio_unref(acb);
}
static inline BlockDriverAIOCB *null_aio_common(BlockDriverState *bs,
BlockDriverCompletionFunc *cb,
void *opaque)
{
NullAIOCB *acb;
acb = qemu_aio_get(&null_aiocb_info, bs, cb, opaque);
acb->bh = aio_bh_new(bdrv_get_aio_context(bs), null_bh_cb, acb);
qemu_bh_schedule(acb->bh);
return &acb->common;
}
static BlockDriverAIOCB *null_aio_readv(BlockDriverState *bs,
int64_t sector_num, QEMUIOVector *qiov,
int nb_sectors,
BlockDriverCompletionFunc *cb,
void *opaque)
{
return null_aio_common(bs, cb, opaque);
}
static BlockDriverAIOCB *null_aio_writev(BlockDriverState *bs,
int64_t sector_num, QEMUIOVector *qiov,
int nb_sectors,
BlockDriverCompletionFunc *cb,
void *opaque)
{
return null_aio_common(bs, cb, opaque);
}
static BlockDriverAIOCB *null_aio_flush(BlockDriverState *bs,
BlockDriverCompletionFunc *cb,
void *opaque)
{
return null_aio_common(bs, cb, opaque);
}
static BlockDriver bdrv_null_co = {
.format_name = "null-co",
.protocol_name = "null-co",
.instance_size = sizeof(BDRVNullState),
.bdrv_file_open = null_file_open,
.bdrv_close = null_close,
.bdrv_getlength = null_getlength,
.bdrv_co_readv = null_co_readv,
.bdrv_co_writev = null_co_writev,
.bdrv_co_flush_to_disk = null_co_flush,
};
static BlockDriver bdrv_null_aio = {
.format_name = "null-aio",
.protocol_name = "null-aio",
.instance_size = sizeof(BDRVNullState),
.bdrv_file_open = null_file_open,
.bdrv_close = null_close,
.bdrv_getlength = null_getlength,
.bdrv_aio_readv = null_aio_readv,
.bdrv_aio_writev = null_aio_writev,
.bdrv_aio_flush = null_aio_flush,
};
static void bdrv_null_init(void)
{
bdrv_register(&bdrv_null_co);
bdrv_register(&bdrv_null_aio);
}
block_init(bdrv_null_init);
block/qcow2-cluster.c
+40 -3
View File
@@ -486,6 +486,13 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
goto out;
}
if (offset_into_cluster(s, l2_offset)) {
qcow2_signal_corruption(bs, true, -1, -1, "L2 table offset %#" PRIx64
" unaligned (L1 index: %#" PRIx64 ")",
l2_offset, l1_index);
return -EIO;
}
/* load the l2 table in memory */
ret = l2_load(bs, l2_offset, &l2_table);
@@ -508,8 +515,11 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
break;
case QCOW2_CLUSTER_ZERO:
if (s->qcow_version < 3) {
qcow2_cache_put(bs, s->l2_table_cache, (void**) &l2_table);
return -EIO;
qcow2_signal_corruption(bs, true, -1, -1, "Zero cluster entry found"
" in pre-v3 image (L2 offset: %#" PRIx64
", L2 index: %#x)", l2_offset, l2_index);
ret = -EIO;
goto fail;
}
c = count_contiguous_clusters(nb_clusters, s->cluster_size,
&l2_table[l2_index], QCOW_OFLAG_ZERO);
@@ -525,6 +535,14 @@ int qcow2_get_cluster_offset(BlockDriverState *bs, uint64_t offset,
c = count_contiguous_clusters(nb_clusters, s->cluster_size,
&l2_table[l2_index], QCOW_OFLAG_ZERO);
*cluster_offset &= L2E_OFFSET_MASK;
if (offset_into_cluster(s, *cluster_offset)) {
qcow2_signal_corruption(bs, true, -1, -1, "Data cluster offset %#"
PRIx64 " unaligned (L2 offset: %#" PRIx64
", L2 index: %#x)", *cluster_offset,
l2_offset, l2_index);
ret = -EIO;
goto fail;
}
break;
default:
abort();
@@ -541,6 +559,10 @@ out:
*num = nb_available - index_in_cluster;
return ret;
fail:
qcow2_cache_put(bs, s->l2_table_cache, (void **)&l2_table);
return ret;
}
/*
@@ -576,6 +598,12 @@ static int get_cluster_table(BlockDriverState *bs, uint64_t offset,
assert(l1_index < s->l1_size);
l2_offset = s->l1_table[l1_index] & L1E_OFFSET_MASK;
if (offset_into_cluster(s, l2_offset)) {
qcow2_signal_corruption(bs, true, -1, -1, "L2 table offset %#" PRIx64
" unaligned (L1 index: %#" PRIx64 ")",
l2_offset, l1_index);
return -EIO;
}
/* seek the l2 table of the given l2 offset */
@@ -948,6 +976,15 @@ static int handle_copied(BlockDriverState *bs, uint64_t guest_offset,
bool offset_matches =
(cluster_offset & L2E_OFFSET_MASK) == *host_offset;
if (offset_into_cluster(s, cluster_offset & L2E_OFFSET_MASK)) {
qcow2_signal_corruption(bs, true, -1, -1, "Data cluster offset "
"%#llx unaligned (guest offset: %#" PRIx64
")", cluster_offset & L2E_OFFSET_MASK,
guest_offset);
ret = -EIO;
goto out;
}
if (*host_offset != 0 && !offset_matches) {
*bytes = 0;
ret = 0;
@@ -979,7 +1016,7 @@ out:
/* Only return a host offset if we actually made progress. Otherwise we
* would make requirements for handle_alloc() that it can't fulfill */
if (ret) {
if (ret > 0) {
*host_offset = (cluster_offset & L2E_OFFSET_MASK)
+ offset_into_cluster(s, guest_offset);
}
block/qcow2-refcount.c
+45 -22
View File
@@ -26,8 +26,6 @@
#include "block/block_int.h"
#include "block/qcow2.h"
#include "qemu/range.h"
#include "qapi/qmp/types.h"
#include "qapi-event.h"
static int64_t alloc_clusters_noref(BlockDriverState *bs, uint64_t size);
static int QEMU_WARN_UNUSED_RESULT update_refcount(BlockDriverState *bs,
@@ -110,6 +108,13 @@ static int get_refcount(BlockDriverState *bs, int64_t cluster_index)
if (!refcount_block_offset)
return 0;
if (offset_into_cluster(s, refcount_block_offset)) {
qcow2_signal_corruption(bs, true, -1, -1, "Refblock offset %#" PRIx64
" unaligned (reftable index: %#" PRIx64 ")",
refcount_block_offset, refcount_table_index);
return -EIO;
}
ret = qcow2_cache_get(bs, s->refcount_block_cache, refcount_block_offset,
(void**) &refcount_block);
if (ret < 0) {
@@ -183,6 +188,14 @@ static int alloc_refcount_block(BlockDriverState *bs,
/* If it's already there, we're done */
if (refcount_block_offset) {
if (offset_into_cluster(s, refcount_block_offset)) {
qcow2_signal_corruption(bs, true, -1, -1, "Refblock offset %#"
PRIx64 " unaligned (reftable index: "
"%#x)", refcount_block_offset,
refcount_table_index);
return -EIO;
}
return load_refcount_block(bs, refcount_block_offset,
(void**) refcount_block);
}
@@ -838,8 +851,14 @@ void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
case QCOW2_CLUSTER_NORMAL:
case QCOW2_CLUSTER_ZERO:
if (l2_entry & L2E_OFFSET_MASK) {
qcow2_free_clusters(bs, l2_entry & L2E_OFFSET_MASK,
nb_clusters << s->cluster_bits, type);
if (offset_into_cluster(s, l2_entry & L2E_OFFSET_MASK)) {
qcow2_signal_corruption(bs, false, -1, -1,
"Cannot free unaligned cluster %#llx",
l2_entry & L2E_OFFSET_MASK);
} else {
qcow2_free_clusters(bs, l2_entry & L2E_OFFSET_MASK,
nb_clusters << s->cluster_bits, type);
}
}
break;
case QCOW2_CLUSTER_UNALLOCATED:
@@ -903,6 +922,14 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
old_l2_offset = l2_offset;
l2_offset &= L1E_OFFSET_MASK;
if (offset_into_cluster(s, l2_offset)) {
qcow2_signal_corruption(bs, true, -1, -1, "L2 table offset %#"
PRIx64 " unaligned (L1 index: %#x)",
l2_offset, i);
ret = -EIO;
goto fail;
}
ret = qcow2_cache_get(bs, s->l2_table_cache, l2_offset,
(void**) &l2_table);
if (ret < 0) {
@@ -935,6 +962,17 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
case QCOW2_CLUSTER_NORMAL:
case QCOW2_CLUSTER_ZERO:
if (offset_into_cluster(s, offset & L2E_OFFSET_MASK)) {
qcow2_signal_corruption(bs, true, -1, -1, "Data "
"cluster offset %#llx "
"unaligned (L2 offset: %#"
PRIx64 ", L2 index: %#x)",
offset & L2E_OFFSET_MASK,
l2_offset, j);
ret = -EIO;
goto fail;
}
cluster_index = (offset & L2E_OFFSET_MASK) >> s->cluster_bits;
if (!cluster_index) {
/* unallocated */
@@ -1838,26 +1876,11 @@ int qcow2_pre_write_overlap_check(BlockDriverState *bs, int ign, int64_t offset,
return ret;
} else if (ret > 0) {
int metadata_ol_bitnr = ffs(ret) - 1;
char *message;
assert(metadata_ol_bitnr < QCOW2_OL_MAX_BITNR);
fprintf(stderr, "qcow2: Preventing invalid write on metadata (overlaps "
"with %s); image marked as corrupt.\n",
metadata_ol_names[metadata_ol_bitnr]);
message = g_strdup_printf("Prevented %s overwrite",
metadata_ol_names[metadata_ol_bitnr]);
qapi_event_send_block_image_corrupted(bdrv_get_device_name(bs),
message,
true,
offset,
true,
size,
&error_abort);
g_free(message);
qcow2_mark_corrupt(bs);
bs->drv = NULL; /* make BDS unusable */
qcow2_signal_corruption(bs, true, offset, size, "Preventing invalid "
"write on metadata (overlaps with %s)",
metadata_ol_names[metadata_ol_bitnr]);
return -EIO;
}
block/qcow2.c
+73 -4
View File
@@ -31,6 +31,8 @@
#include "qapi/qmp/qerror.h"
#include "qapi/qmp/qbool.h"
#include "qapi/util.h"
#include "qapi/qmp/types.h"
#include "qapi-event.h"
#include "trace.h"
#include "qemu/option_int.h"
@@ -403,6 +405,12 @@ static QemuOptsList qcow2_runtime_opts = {
.help = "Selects which overlap checks to perform from a range of "
"templates (none, constant, cached, all)",
},
{
.name = QCOW2_OPT_OVERLAP_TEMPLATE,
.type = QEMU_OPT_STRING,
.help = "Selects which overlap checks to perform from a range of "
"templates (none, constant, cached, all)",
},
{
.name = QCOW2_OPT_OVERLAP_MAIN_HEADER,
.type = QEMU_OPT_BOOL,
@@ -536,11 +544,11 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
unsigned int len, i;
int ret = 0;
QCowHeader header;
QemuOpts *opts;
QemuOpts *opts = NULL;
Error *local_err = NULL;
uint64_t ext_end;
uint64_t l1_vm_state_index;
const char *opt_overlap_check;
const char *opt_overlap_check, *opt_overlap_check_template;
int overlap_check_template = 0;
uint64_t l2_cache_size, refcount_cache_size;
@@ -920,7 +928,21 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
s->discard_passthrough[QCOW2_DISCARD_OTHER] =
qemu_opt_get_bool(opts, QCOW2_OPT_DISCARD_OTHER, false);
opt_overlap_check = qemu_opt_get(opts, "overlap-check") ?: "cached";
opt_overlap_check = qemu_opt_get(opts, QCOW2_OPT_OVERLAP);
opt_overlap_check_template = qemu_opt_get(opts, QCOW2_OPT_OVERLAP_TEMPLATE);
if (opt_overlap_check_template && opt_overlap_check &&
strcmp(opt_overlap_check_template, opt_overlap_check))
{
error_setg(errp, "Conflicting values for qcow2 options '"
QCOW2_OPT_OVERLAP "' ('%s') and '" QCOW2_OPT_OVERLAP_TEMPLATE
"' ('%s')", opt_overlap_check, opt_overlap_check_template);
ret = -EINVAL;
goto fail;
}
if (!opt_overlap_check) {
opt_overlap_check = opt_overlap_check_template ?: "cached";
}
if (!strcmp(opt_overlap_check, "none")) {
overlap_check_template = 0;
} else if (!strcmp(opt_overlap_check, "constant")) {
@@ -933,7 +955,6 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
error_setg(errp, "Unsupported value '%s' for qcow2 option "
"'overlap-check'. Allowed are either of the following: "
"none, constant, cached, all", opt_overlap_check);
qemu_opts_del(opts);
ret = -EINVAL;
goto fail;
}
@@ -948,6 +969,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
}
qemu_opts_del(opts);
opts = NULL;
if (s->use_lazy_refcounts && s->qcow_version < 3) {
error_setg(errp, "Lazy refcounts require a qcow2 image with at least "
@@ -965,6 +987,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
return ret;
fail:
qemu_opts_del(opts);
g_free(s->unknown_header_fields);
cleanup_unknown_header_ext(bs);
qcow2_free_snapshots(bs);
@@ -2529,6 +2552,52 @@ static int qcow2_amend_options(BlockDriverState *bs, QemuOpts *opts)
return 0;
}
/*
* If offset or size are negative, respectively, they will not be included in
* the BLOCK_IMAGE_CORRUPTED event emitted.
* fatal will be ignored for read-only BDS; corruptions found there will always
* be considered non-fatal.
*/
void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
int64_t size, const char *message_format, ...)
{
BDRVQcowState *s = bs->opaque;
char *message;
va_list ap;
fatal = fatal && !bs->read_only;
if (s->signaled_corruption &&
(!fatal || (s->incompatible_features & QCOW2_INCOMPAT_CORRUPT)))
{
return;
}
va_start(ap, message_format);
message = g_strdup_vprintf(message_format, ap);
va_end(ap);
if (fatal) {
fprintf(stderr, "qcow2: Marking image as corrupt: %s; further "
"corruption events will be suppressed\n", message);
} else {
fprintf(stderr, "qcow2: Image is corrupt: %s; further non-fatal "
"corruption events will be suppressed\n", message);
}
qapi_event_send_block_image_corrupted(bdrv_get_device_name(bs), message,
offset >= 0, offset, size >= 0, size,
fatal, &error_abort);
g_free(message);
if (fatal) {
qcow2_mark_corrupt(bs);
bs->drv = NULL; /* make BDS unusable */
}
s->signaled_corruption = true;
}
static QemuOptsList qcow2_create_opts = {
.name = "qcow2-create-opts",
.head = QTAILQ_HEAD_INITIALIZER(qcow2_create_opts.head),
block/qcow2.h
+6
View File
@@ -83,6 +83,7 @@
#define QCOW2_OPT_DISCARD_SNAPSHOT "pass-discard-snapshot"
#define QCOW2_OPT_DISCARD_OTHER "pass-discard-other"
#define QCOW2_OPT_OVERLAP "overlap-check"
#define QCOW2_OPT_OVERLAP_TEMPLATE "overlap-check.template"
#define QCOW2_OPT_OVERLAP_MAIN_HEADER "overlap-check.main-header"
#define QCOW2_OPT_OVERLAP_ACTIVE_L1 "overlap-check.active-l1"
#define QCOW2_OPT_OVERLAP_ACTIVE_L2 "overlap-check.active-l2"
@@ -261,6 +262,7 @@ typedef struct BDRVQcowState {
bool discard_passthrough[QCOW2_DISCARD_MAX];
int overlap_check; /* bitmask of Qcow2MetadataOverlap values */
bool signaled_corruption;
uint64_t incompatible_features;
uint64_t compatible_features;
@@ -477,6 +479,10 @@ int qcow2_mark_corrupt(BlockDriverState *bs);
int qcow2_mark_consistent(BlockDriverState *bs);
int qcow2_update_header(BlockDriverState *bs);
void qcow2_signal_corruption(BlockDriverState *bs, bool fatal, int64_t offset,
int64_t size, const char *message_format, ...)
GCC_FMT_ATTR(5, 6);
/* qcow2-refcount.c functions */
int qcow2_refcount_init(BlockDriverState *bs);
void qcow2_refcount_close(BlockDriverState *bs);
block/qed.c
+1 -22
View File
@@ -18,22 +18,8 @@
#include "qapi/qmp/qerror.h"
#include "migration/migration.h"
static void qed_aio_cancel(BlockDriverAIOCB *blockacb)
{
QEDAIOCB *acb = (QEDAIOCB *)blockacb;
AioContext *aio_context = bdrv_get_aio_context(blockacb->bs);
bool finished = false;
/* Wait for the request to finish */
acb->finished = &finished;
while (!finished) {
aio_poll(aio_context, true);
}
}
static const AIOCBInfo qed_aiocb_info = {
.aiocb_size = sizeof(QEDAIOCB),
.cancel = qed_aio_cancel,
};
static int bdrv_qed_probe(const uint8_t *buf, int buf_size,
@@ -919,18 +905,12 @@ static void qed_aio_complete_bh(void *opaque)
BlockDriverCompletionFunc *cb = acb->common.cb;
void *user_opaque = acb->common.opaque;
int ret = acb->bh_ret;
bool *finished = acb->finished;
qemu_bh_delete(acb->bh);
qemu_aio_release(acb);
qemu_aio_unref(acb);
/* Invoke callback */
cb(user_opaque, ret);
/* Signal cancel completion */
if (finished) {
*finished = true;
}
}
static void qed_aio_complete(QEDAIOCB *acb, int ret)
@@ -1397,7 +1377,6 @@ static BlockDriverAIOCB *qed_aio_setup(BlockDriverState *bs,
opaque, flags);
acb->flags = flags;
acb->finished = NULL;
acb->qiov = qiov;
acb->qiov_offset = 0;
acb->cur_pos = (uint64_t)sector_num * BDRV_SECTOR_SIZE;
block/quorum.c
+5 -6
View File
@@ -138,16 +138,15 @@ static void quorum_aio_cancel(BlockDriverAIOCB *blockacb)
/* cancel all callbacks */
for (i = 0; i < s->num_children; i++) {
bdrv_aio_cancel(acb->qcrs[i].aiocb);
if (acb->qcrs[i].aiocb) {
bdrv_aio_cancel_async(acb->qcrs[i].aiocb);
}
}
g_free(acb->qcrs);
qemu_aio_release(acb);
}
static AIOCBInfo quorum_aiocb_info = {
.aiocb_size = sizeof(QuorumAIOCB),
.cancel = quorum_aio_cancel,
.cancel_async = quorum_aio_cancel,
};
static void quorum_aio_finalize(QuorumAIOCB *acb)
@@ -169,7 +168,7 @@ static void quorum_aio_finalize(QuorumAIOCB *acb)
}
g_free(acb->qcrs);
qemu_aio_release(acb);
qemu_aio_unref(acb);
}
static bool quorum_sha256_compare(QuorumVoteValue *a, QuorumVoteValue *b)
block/rbd.c
+2 -23
View File
@@ -77,7 +77,6 @@ typedef struct RBDAIOCB {
int64_t sector_num;
int error;
struct BDRVRBDState *s;
int cancelled;
int status;
} RBDAIOCB;
@@ -408,9 +407,7 @@ static void qemu_rbd_complete_aio(RADOSCB *rcb)
acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret));
acb->status = 0;
if (!acb->cancelled) {
qemu_aio_release(acb);
}
qemu_aio_unref(acb);
}
/* TODO Convert to fine grained options */
@@ -539,25 +536,8 @@ static void qemu_rbd_close(BlockDriverState *bs)
rados_shutdown(s->cluster);
}
/*
* Cancel aio. Since we don't reference acb in a non qemu threads,
* it is safe to access it here.
*/
static void qemu_rbd_aio_cancel(BlockDriverAIOCB *blockacb)
{
RBDAIOCB *acb = (RBDAIOCB *) blockacb;
acb->cancelled = 1;
while (acb->status == -EINPROGRESS) {
aio_poll(bdrv_get_aio_context(acb->common.bs), true);
}
qemu_aio_release(acb);
}
static const AIOCBInfo rbd_aiocb_info = {
.aiocb_size = sizeof(RBDAIOCB),
.cancel = qemu_rbd_aio_cancel,
};
static void rbd_finish_bh(void *opaque)
@@ -640,7 +620,6 @@ static BlockDriverAIOCB *rbd_start_aio(BlockDriverState *bs,
acb->ret = 0;
acb->error = 0;
acb->s = s;
acb->cancelled = 0;
acb->bh = NULL;
acb->status = -EINPROGRESS;
@@ -692,7 +671,7 @@ failed_completion:
failed:
g_free(rcb);
qemu_vfree(acb->bounce);
qemu_aio_release(acb);
qemu_aio_unref(acb);
return NULL;
}
block/sheepdog.c
+24 -32
View File
@@ -315,7 +315,6 @@ struct SheepdogAIOCB {
void (*aio_done_func)(SheepdogAIOCB *);
bool cancelable;
bool *finished;
int nr_pending;
};
@@ -446,10 +445,7 @@ static inline void free_aio_req(BDRVSheepdogState *s, AIOReq *aio_req)
static void coroutine_fn sd_finish_aiocb(SheepdogAIOCB *acb)
{
qemu_coroutine_enter(acb->coroutine, NULL);
if (acb->finished) {
*acb->finished = true;
}
qemu_aio_release(acb);
qemu_aio_unref(acb);
}
/*
@@ -482,36 +478,33 @@ static void sd_aio_cancel(BlockDriverAIOCB *blockacb)
SheepdogAIOCB *acb = (SheepdogAIOCB *)blockacb;
BDRVSheepdogState *s = acb->common.bs->opaque;
AIOReq *aioreq, *next;
bool finished = false;
acb->finished = &finished;
while (!finished) {
if (sd_acb_cancelable(acb)) {
/* Remove outstanding requests from pending and failed queues. */
QLIST_FOREACH_SAFE(aioreq, &s->pending_aio_head, aio_siblings,
next) {
if (aioreq->aiocb == acb) {
free_aio_req(s, aioreq);
}
if (sd_acb_cancelable(acb)) {
/* Remove outstanding requests from pending and failed queues. */
QLIST_FOREACH_SAFE(aioreq, &s->pending_aio_head, aio_siblings,
next) {
if (aioreq->aiocb == acb) {
free_aio_req(s, aioreq);
}
QLIST_FOREACH_SAFE(aioreq, &s->failed_aio_head, aio_siblings,
next) {
if (aioreq->aiocb == acb) {
free_aio_req(s, aioreq);
}
}
assert(acb->nr_pending == 0);
sd_finish_aiocb(acb);
return;
}
aio_poll(s->aio_context, true);
QLIST_FOREACH_SAFE(aioreq, &s->failed_aio_head, aio_siblings,
next) {
if (aioreq->aiocb == acb) {
free_aio_req(s, aioreq);
}
}
assert(acb->nr_pending == 0);
if (acb->common.cb) {
acb->common.cb(acb->common.opaque, -ECANCELED);
}
sd_finish_aiocb(acb);
}
}
static const AIOCBInfo sd_aiocb_info = {
.aiocb_size = sizeof(SheepdogAIOCB),
.cancel = sd_aio_cancel,
.aiocb_size = sizeof(SheepdogAIOCB),
.cancel_async = sd_aio_cancel,
};
static SheepdogAIOCB *sd_aio_setup(BlockDriverState *bs, QEMUIOVector *qiov,
@@ -528,7 +521,6 @@ static SheepdogAIOCB *sd_aio_setup(BlockDriverState *bs, QEMUIOVector *qiov,
acb->aio_done_func = NULL;
acb->cancelable = true;
acb->finished = NULL;
acb->coroutine = qemu_coroutine_self();
acb->ret = 0;
acb->nr_pending = 0;
@@ -2138,7 +2130,7 @@ static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num,
ret = sd_co_rw_vector(acb);
if (ret <= 0) {
qemu_aio_release(acb);
qemu_aio_unref(acb);
return ret;
}
@@ -2159,7 +2151,7 @@ static coroutine_fn int sd_co_readv(BlockDriverState *bs, int64_t sector_num,
ret = sd_co_rw_vector(acb);
if (ret <= 0) {
qemu_aio_release(acb);
qemu_aio_unref(acb);
return ret;
}
@@ -2518,7 +2510,7 @@ static coroutine_fn int sd_co_discard(BlockDriverState *bs, int64_t sector_num,
ret = sd_co_rw_vector(acb);
if (ret <= 0) {
qemu_aio_release(acb);
qemu_aio_unref(acb);
return ret;
}

Some files were not shown because too many files have changed in this diff Show More