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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block patches

# gpg: Signature made Wed 30 Apr 2014 19:19:32 BST using RSA key ID C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"

* remotes/kevin/tags/for-upstream: (31 commits)
  curl: Fix hang reading from slow connections
  curl: Ensure all informationals are checked for completion
  curl: Eliminate unnecessary use of curl_multi_socket_all
  curl: Remove unnecessary explicit calls to internal event handler
  curl: Remove erroneous sleep waiting for curl completion
  curl: Fix return from curl_read_cb with invalid state
  curl: Remove unnecessary use of goto
  curl: Fix long line
  block/vdi: Error out immediately in vdi_create()
  block/bochs: Fix error handling for seek_to_sector()
  qcow2: Check min_size in qcow2_grow_l1_table()
  qcow2: Catch bdrv_getlength() error
  block: Use correct width in format strings
  qcow2: Avoid overflow in alloc_clusters_noref()
  block: Use error_abort in bdrv_image_info_specific_dump()
  block: Fix open_flags in bdrv_reopen()
  Revert "block: another bdrv_append fix"
  block: Unlink temporary files in raw-posix/win32
  block: Remove BDRV_O_COPY_ON_READ for bs->file
  block: Create bdrv_backing_flags()
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2014-05-02 10:50:58 +01:00
commit e50bf23438
24 changed files with 352 additions and 168 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

108
block.c
View File

@ -774,6 +774,45 @@ void bdrv_disable_copy_on_read(BlockDriverState *bs)
bs->copy_on_read--;
}
/*
* Returns the flags that bs->file should get, based on the given flags for
* the parent BDS
*/
static int bdrv_inherited_flags(int flags)
{
/* Enable protocol handling, disable format probing for bs->file */
flags |= BDRV_O_PROTOCOL;
/* Our block drivers take care to send flushes and respect unmap policy,
* so we can enable both unconditionally on lower layers. */
flags |= BDRV_O_CACHE_WB | BDRV_O_UNMAP;
/* The backing file of a temporary snapshot is read-only */
if (flags & BDRV_O_SNAPSHOT) {
flags &= ~BDRV_O_RDWR;
}
/* Clear flags that only apply to the top layer */
flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | BDRV_O_COPY_ON_READ);
return flags;
}
/*
* Returns the flags that bs->backing_hd should get, based on the given flags
* for the parent BDS
*/
static int bdrv_backing_flags(int flags)
{
/* backing files always opened read-only */
flags &= ~(BDRV_O_RDWR | BDRV_O_COPY_ON_READ);
/* snapshot=on is handled on the top layer */
flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_TEMPORARY);
return flags;
}
static int bdrv_open_flags(BlockDriverState *bs, int flags)
{
int open_flags = flags | BDRV_O_CACHE_WB;
@ -792,7 +831,7 @@ static int bdrv_open_flags(BlockDriverState *bs, int flags)
/*
* Snapshots should be writable.
*/
if (bs->is_temporary) {
if (flags & BDRV_O_TEMPORARY) {
open_flags |= BDRV_O_RDWR;
}
@ -951,13 +990,6 @@ static int bdrv_open_common(BlockDriverState *bs, BlockDriverState *file,
bdrv_refresh_limits(bs);
assert(bdrv_opt_mem_align(bs) != 0);
assert((bs->request_alignment != 0) || bs->sg);
#ifndef _WIN32
if (bs->is_temporary) {
assert(bs->filename[0] != '\0');
unlink(bs->filename);
}
#endif
return 0;
free_and_fail:
@ -1069,7 +1101,7 @@ fail:
int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp)
{
char *backing_filename = g_malloc0(PATH_MAX);
int back_flags, ret = 0;
int ret = 0;
BlockDriver *back_drv = NULL;
Error *local_err = NULL;
@ -1097,14 +1129,10 @@ int bdrv_open_backing_file(BlockDriverState *bs, QDict *options, Error **errp)
back_drv = bdrv_find_format(bs->backing_format);
}
/* backing files always opened read-only */
back_flags = bs->open_flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT |
BDRV_O_COPY_ON_READ);
assert(bs->backing_hd == NULL);
ret = bdrv_open(&bs->backing_hd,
*backing_filename ? backing_filename : NULL, NULL, options,
back_flags, back_drv, &local_err);
bdrv_backing_flags(bs->open_flags), back_drv, &local_err);
if (ret < 0) {
bs->backing_hd = NULL;
bs->open_flags |= BDRV_O_NO_BACKING;
@ -1232,10 +1260,10 @@ void bdrv_append_temp_snapshot(BlockDriverState *bs, Error **errp)
qstring_from_str(tmp_filename));
bs_snapshot = bdrv_new("", &error_abort);
bs_snapshot->is_temporary = 1;
ret = bdrv_open(&bs_snapshot, NULL, NULL, snapshot_options,
bs->open_flags & ~BDRV_O_SNAPSHOT, bdrv_qcow2, &local_err);
(bs->open_flags & ~BDRV_O_SNAPSHOT) | BDRV_O_TEMPORARY,
bdrv_qcow2, &local_err);
if (ret < 0) {
error_propagate(errp, local_err);
goto out;
@ -1333,10 +1361,10 @@ int bdrv_open(BlockDriverState **pbs, const char *filename,
assert(file == NULL);
ret = bdrv_open_image(&file, filename, options, "file",
bdrv_open_flags(bs, flags | BDRV_O_UNMAP) |
BDRV_O_PROTOCOL, true, &local_err);
bdrv_inherited_flags(flags),
true, &local_err);
if (ret < 0) {
goto unlink_and_fail;
goto fail;
}
/* Find the right image format driver */
@ -1347,7 +1375,7 @@ int bdrv_open(BlockDriverState **pbs, const char *filename,
if (!drv) {
error_setg(errp, "Invalid driver: '%s'", drvname);
ret = -EINVAL;
goto unlink_and_fail;
goto fail;
}
}
@ -1357,18 +1385,18 @@ int bdrv_open(BlockDriverState **pbs, const char *filename,
} else {
error_setg(errp, "Must specify either driver or file");
ret = -EINVAL;
goto unlink_and_fail;
goto fail;
}
}
if (!drv) {
goto unlink_and_fail;
goto fail;
}
/* Open the image */
ret = bdrv_open_common(bs, file, options, flags, drv, &local_err);
if (ret < 0) {
goto unlink_and_fail;
goto fail;
}
if (file && (bs->file != file)) {
@ -1430,14 +1458,10 @@ done:
*pbs = bs;
return 0;
unlink_and_fail:
fail:
if (file != NULL) {
bdrv_unref(file);
}
if (bs->is_temporary) {
unlink(filename);
}
fail:
QDECREF(bs->options);
QDECREF(options);
bs->options = NULL;
@ -1501,8 +1525,11 @@ BlockReopenQueue *bdrv_reopen_queue(BlockReopenQueue *bs_queue,
QSIMPLEQ_INIT(bs_queue);
}
/* bdrv_open() masks this flag out */
flags &= ~BDRV_O_PROTOCOL;
if (bs->file) {
bdrv_reopen_queue(bs_queue, bs->file, flags);
bdrv_reopen_queue(bs_queue, bs->file, bdrv_inherited_flags(flags));
}
bs_entry = g_new0(BlockReopenQueueEntry, 1);
@ -1717,11 +1744,6 @@ void bdrv_close(BlockDriverState *bs)
}
bs->drv->bdrv_close(bs);
g_free(bs->opaque);
#ifdef _WIN32
if (bs->is_temporary) {
unlink(bs->filename);
}
#endif
bs->opaque = NULL;
bs->drv = NULL;
bs->copy_on_read = 0;
@ -1845,7 +1867,6 @@ static void bdrv_move_feature_fields(BlockDriverState *bs_dest,
BlockDriverState *bs_src)
{
/* move some fields that need to stay attached to the device */
bs_dest->open_flags = bs_src->open_flags;
/* dev info */
bs_dest->dev_ops = bs_src->dev_ops;
@ -3601,10 +3622,25 @@ void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
void *opaque)
{
BlockDriver *drv;
int count = 0;
const char **formats = NULL;
QLIST_FOREACH(drv, &bdrv_drivers, list) {
it(opaque, drv->format_name);
if (drv->format_name) {
bool found = false;
int i = count;
while (formats && i && !found) {
found = !strcmp(formats[--i], drv->format_name);
}
if (!found) {
formats = g_realloc(formats, (count + 1) * sizeof(char *));
formats[count++] = drv->format_name;
it(opaque, drv->format_name);
}
}
}
g_free(formats);
}
/* This function is to find block backend bs */

23
block/bochs.c
View File

@ -187,13 +187,14 @@ static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
uint64_t offset = sector_num * 512;
uint64_t extent_index, extent_offset, bitmap_offset;
char bitmap_entry;
int ret;
// seek to sector
extent_index = offset / s->extent_size;
extent_offset = (offset % s->extent_size) / 512;
if (s->catalog_bitmap[extent_index] == 0xffffffff) {
return -1; /* not allocated */
return 0; /* not allocated */
}
bitmap_offset = s->data_offset +
@ -201,13 +202,14 @@ static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num)
(s->extent_blocks + s->bitmap_blocks));
/* read in bitmap for current extent */
if (bdrv_pread(bs->file, bitmap_offset + (extent_offset / 8),
&bitmap_entry, 1) != 1) {
return -1;
ret = bdrv_pread(bs->file, bitmap_offset + (extent_offset / 8),
&bitmap_entry, 1);
if (ret < 0) {
return ret;
}
if (!((bitmap_entry >> (extent_offset % 8)) & 1)) {
return -1; /* not allocated */
return 0; /* not allocated */
}
return bitmap_offset + (512 * (s->bitmap_blocks + extent_offset));
@ -220,13 +222,16 @@ static int bochs_read(BlockDriverState *bs, int64_t sector_num,
while (nb_sectors > 0) {
int64_t block_offset = seek_to_sector(bs, sector_num);
if (block_offset >= 0) {
if (block_offset < 0) {
return block_offset;
} else if (block_offset > 0) {
ret = bdrv_pread(bs->file, block_offset, buf, 512);
if (ret != 512) {
return -1;
if (ret < 0) {
return ret;
}
} else
} else {
memset(buf, 0, 512);
}
nb_sectors--;
sector_num++;
buf += 512;

2
block/cow.c
View File

@ -82,7 +82,7 @@ static int cow_open(BlockDriverState *bs, QDict *options, int flags,
if (be32_to_cpu(cow_header.version) != COW_VERSION) {
char version[64];
snprintf(version, sizeof(version),
"COW version %d", cow_header.version);
"COW version %" PRIu32, cow_header.version);
error_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
bs->device_name, "cow", version);
ret = -ENOTSUP;

147
block/curl.c
View File

@ -71,6 +71,7 @@ typedef struct CURLState
struct BDRVCURLState *s;
CURLAIOCB *acb[CURL_NUM_ACB];
CURL *curl;
curl_socket_t sock_fd;
char *orig_buf;
size_t buf_start;
size_t buf_off;
@ -92,6 +93,7 @@ typedef struct BDRVCURLState {
static void curl_clean_state(CURLState *s);
static void curl_multi_do(void *arg);
static void curl_multi_read(void *arg);
#ifdef NEED_CURL_TIMER_CALLBACK
static int curl_timer_cb(CURLM *multi, long timeout_ms, void *opaque)
@ -113,16 +115,20 @@ static int curl_timer_cb(CURLM *multi, long timeout_ms, void *opaque)
static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
void *s, void *sp)
{
CURLState *state = NULL;
curl_easy_getinfo(curl, CURLINFO_PRIVATE, (char **)&state);
state->sock_fd = fd;
DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, fd);
switch (action) {
case CURL_POLL_IN:
qemu_aio_set_fd_handler(fd, curl_multi_do, NULL, s);
qemu_aio_set_fd_handler(fd, curl_multi_read, NULL, state);
break;
case CURL_POLL_OUT:
qemu_aio_set_fd_handler(fd, NULL, curl_multi_do, s);
qemu_aio_set_fd_handler(fd, NULL, curl_multi_do, state);
break;
case CURL_POLL_INOUT:
qemu_aio_set_fd_handler(fd, curl_multi_do, curl_multi_do, s);
qemu_aio_set_fd_handler(fd, curl_multi_read, curl_multi_do, state);
break;
case CURL_POLL_REMOVE:
qemu_aio_set_fd_handler(fd, NULL, NULL, NULL);
@ -155,7 +161,7 @@ static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
DPRINTF("CURL: Just reading %zd bytes\n", realsize);
if (!s || !s->orig_buf)
goto read_end;
return 0;
if (s->buf_off >= s->buf_len) {
/* buffer full, read nothing */
@ -180,7 +186,6 @@ static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
}
}
read_end:
return realsize;
}
@ -215,7 +220,8 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
}
// Wait for unfinished chunks
if ((start >= state->buf_start) &&
if (state->in_use &&
(start >= state->buf_start) &&
(start <= buf_fend) &&
(end >= state->buf_start) &&
(end <= buf_fend))
@ -237,68 +243,69 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
return FIND_RET_NONE;
}
static void curl_multi_read(BDRVCURLState *s)
static void curl_multi_check_completion(BDRVCURLState *s)
{
int msgs_in_queue;
/* Try to find done transfers, so we can free the easy
* handle again. */
do {
for (;;) {
CURLMsg *msg;
msg = curl_multi_info_read(s->multi, &msgs_in_queue);
/* Quit when there are no more completions */
if (!msg)
break;
if (msg->msg == CURLMSG_NONE)
break;
switch (msg->msg) {
case CURLMSG_DONE:
{
CURLState *state = NULL;
curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, (char**)&state);
if (msg->msg == CURLMSG_DONE) {
CURLState *state = NULL;
curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE,
(char **)&state);
/* ACBs for successful messages get completed in curl_read_cb */
if (msg->data.result != CURLE_OK) {
int i;
for (i = 0; i < CURL_NUM_ACB; i++) {
CURLAIOCB *acb = state->acb[i];
/* ACBs for successful messages get completed in curl_read_cb */
if (msg->data.result != CURLE_OK) {
int i;
for (i = 0; i < CURL_NUM_ACB; i++) {
CURLAIOCB *acb = state->acb[i];
if (acb == NULL) {
continue;
}
acb->common.cb(acb->common.opaque, -EIO);
qemu_aio_release(acb);
state->acb[i] = NULL;
if (acb == NULL) {
continue;
}
}
curl_clean_state(state);
break;
acb->common.cb(acb->common.opaque, -EIO);
qemu_aio_release(acb);
state->acb[i] = NULL;
}
}
default:
msgs_in_queue = 0;
break;
curl_clean_state(state);
break;
}
} while(msgs_in_queue);
}
}
static void curl_multi_do(void *arg)
{
BDRVCURLState *s = (BDRVCURLState *)arg;
CURLState *s = (CURLState *)arg;
int running;
int r;
if (!s->multi) {
if (!s->s->multi) {
return;
}
do {
r = curl_multi_socket_all(s->multi, &running);
r = curl_multi_socket_action(s->s->multi, s->sock_fd, 0, &running);
} while(r == CURLM_CALL_MULTI_PERFORM);
curl_multi_read(s);
}
static void curl_multi_read(void *arg)
{
CURLState *s = (CURLState *)arg;
curl_multi_do(arg);
curl_multi_check_completion(s->s);
}
static void curl_multi_timeout_do(void *arg)
@ -313,7 +320,7 @@ static void curl_multi_timeout_do(void *arg)
curl_multi_socket_action(s->multi, CURL_SOCKET_TIMEOUT, 0, &running);
curl_multi_read(s);
curl_multi_check_completion(s);
#else
abort();
#endif
@ -337,44 +344,42 @@ static CURLState *curl_init_state(BDRVCURLState *s)
break;
}
if (!state) {
g_usleep(100);
curl_multi_do(s);
qemu_aio_wait();
}
} while(!state);
if (state->curl)
goto has_curl;
if (!state->curl) {
state->curl = curl_easy_init();
if (!state->curl) {
return NULL;
}
curl_easy_setopt(state->curl, CURLOPT_URL, s->url);
curl_easy_setopt(state->curl, CURLOPT_TIMEOUT, 5);
curl_easy_setopt(state->curl, CURLOPT_WRITEFUNCTION,
(void *)curl_read_cb);
curl_easy_setopt(state->curl, CURLOPT_WRITEDATA, (void *)state);
curl_easy_setopt(state->curl, CURLOPT_PRIVATE, (void *)state);
curl_easy_setopt(state->curl, CURLOPT_AUTOREFERER, 1);
curl_easy_setopt(state->curl, CURLOPT_FOLLOWLOCATION, 1);
curl_easy_setopt(state->curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(state->curl, CURLOPT_ERRORBUFFER, state->errmsg);
curl_easy_setopt(state->curl, CURLOPT_FAILONERROR, 1);
state->curl = curl_easy_init();
if (!state->curl)
return NULL;
curl_easy_setopt(state->curl, CURLOPT_URL, s->url);
curl_easy_setopt(state->curl, CURLOPT_TIMEOUT, 5);
curl_easy_setopt(state->curl, CURLOPT_WRITEFUNCTION, (void *)curl_read_cb);
curl_easy_setopt(state->curl, CURLOPT_WRITEDATA, (void *)state);
curl_easy_setopt(state->curl, CURLOPT_PRIVATE, (void *)state);
curl_easy_setopt(state->curl, CURLOPT_AUTOREFERER, 1);
curl_easy_setopt(state->curl, CURLOPT_FOLLOWLOCATION, 1);
curl_easy_setopt(state->curl, CURLOPT_NOSIGNAL, 1);
curl_easy_setopt(state->curl, CURLOPT_ERRORBUFFER, state->errmsg);
curl_easy_setopt(state->curl, CURLOPT_FAILONERROR, 1);
/* Restrict supported protocols to avoid security issues in the more
* obscure protocols. For example, do not allow POP3/SMTP/IMAP see
* CVE-2013-0249.
*
* Restricting protocols is only supported from 7.19.4 upwards.
*/
/* Restrict supported protocols to avoid security issues in the more
* obscure protocols. For example, do not allow POP3/SMTP/IMAP see
* CVE-2013-0249.
*
* Restricting protocols is only supported from 7.19.4 upwards.
*/
#if LIBCURL_VERSION_NUM >= 0x071304
curl_easy_setopt(state->curl, CURLOPT_PROTOCOLS, PROTOCOLS);
curl_easy_setopt(state->curl, CURLOPT_REDIR_PROTOCOLS, PROTOCOLS);
curl_easy_setopt(state->curl, CURLOPT_PROTOCOLS, PROTOCOLS);
curl_easy_setopt(state->curl, CURLOPT_REDIR_PROTOCOLS, PROTOCOLS);
#endif
#ifdef DEBUG_VERBOSE
curl_easy_setopt(state->curl, CURLOPT_VERBOSE, 1);
curl_easy_setopt(state->curl, CURLOPT_VERBOSE, 1);
#endif
has_curl:
}
state->s = s;
@ -531,13 +536,11 @@ static int curl_open(BlockDriverState *bs, QDict *options, int flags,
// initialize the multi interface!
s->multi = curl_multi_init();
curl_multi_setopt(s->multi, CURLMOPT_SOCKETDATA, s);
curl_multi_setopt(s->multi, CURLMOPT_SOCKETFUNCTION, curl_sock_cb);
#ifdef NEED_CURL_TIMER_CALLBACK
curl_multi_setopt(s->multi, CURLMOPT_TIMERDATA, s);
curl_multi_setopt(s->multi, CURLMOPT_TIMERFUNCTION, curl_timer_cb);
#endif
curl_multi_do(s);
qemu_opts_del(opts);
return 0;
@ -566,6 +569,7 @@ static const AIOCBInfo curl_aiocb_info = {
static void curl_readv_bh_cb(void *p)
{
CURLState *state;
int running;
CURLAIOCB *acb = p;
BDRVCURLState *s = acb->common.bs->opaque;
@ -614,8 +618,9 @@ static void curl_readv_bh_cb(void *p)
curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range);
curl_multi_add_handle(s->multi, state->curl);
curl_multi_do(s);
/* Tell curl it needs to kick things off */
curl_multi_socket_action(s->multi, CURL_SOCKET_TIMEOUT, 0, &running);
}
static BlockDriverAIOCB *curl_aio_readv(BlockDriverState *bs,

8
block/dmg.c
View File

@ -248,8 +248,8 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags,
offset += 8;
if (s->sectorcounts[i] > DMG_SECTORCOUNTS_MAX) {
error_report("sector count %" PRIu64 " for chunk %u is "
"larger than max (%u)",
error_report("sector count %" PRIu64 " for chunk %" PRIu32
" is larger than max (%u)",
s->sectorcounts[i], i, DMG_SECTORCOUNTS_MAX);
ret = -EINVAL;
goto fail;
@ -269,8 +269,8 @@ static int dmg_open(BlockDriverState *bs, QDict *options, int flags,
offset += 8;
if (s->lengths[i] > DMG_LENGTHS_MAX) {
error_report("length %" PRIu64 " for chunk %u is larger "
"than max (%u)",
error_report("length %" PRIu64 " for chunk %" PRIu32
" is larger than max (%u)",
s->lengths[i], i, DMG_LENGTHS_MAX);
ret = -EINVAL;
goto fail;

11
block/mirror.c
View File

@ -325,11 +325,11 @@ static void coroutine_fn mirror_run(void *opaque)
s->common.len = bdrv_getlength(bs);
if (s->common.len <= 0) {
block_job_completed(&s->common, s->common.len);
return;
ret = s->common.len;
goto immediate_exit;
}
length = (bdrv_getlength(bs) + s->granularity - 1) / s->granularity;
length = DIV_ROUND_UP(s->common.len, s->granularity);
s->in_flight_bitmap = bitmap_new(length);
/* If we have no backing file yet in the destination, we cannot let
@ -339,7 +339,10 @@ static void coroutine_fn mirror_run(void *opaque)
bdrv_get_backing_filename(s->target, backing_filename,
sizeof(backing_filename));
if (backing_filename[0] && !s->target->backing_hd) {
bdrv_get_info(s->target, &bdi);
ret = bdrv_get_info(s->target, &bdi);
if (ret < 0) {
goto immediate_exit;
}
if (s->granularity < bdi.cluster_size) {
s->buf_size = MAX(s->buf_size, bdi.cluster_size);
s->cow_bitmap = bitmap_new(length);

3
block/qapi.c
View File

@ -532,12 +532,11 @@ static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation,
void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f,
ImageInfoSpecific *info_spec)
{
Error *local_err = NULL;
QmpOutputVisitor *ov = qmp_output_visitor_new();
QObject *obj, *data;
visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL,
&local_err);
&error_abort);
obj = qmp_output_get_qobject(ov);
assert(qobject_type(obj) == QTYPE_QDICT);
data = qdict_get(qobject_to_qdict(obj), "data");

3
block/qcow.c
View File

@ -119,7 +119,8 @@ static int qcow_open(BlockDriverState *bs, QDict *options, int flags,
}
if (header.version != QCOW_VERSION) {
char version[64];
snprintf(version, sizeof(version), "QCOW version %d", header.version);
snprintf(version, sizeof(version), "QCOW version %" PRIu32,
header.version);
error_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE,
bs->device_name, "qcow", version);
ret = -ENOTSUP;

33
block/qcow2-cluster.c
View File

@ -42,6 +42,13 @@ int qcow2_grow_l1_table(BlockDriverState *bs, uint64_t min_size,
if (min_size <= s->l1_size)
return 0;
/* Do a sanity check on min_size before trying to calculate new_l1_size
* (this prevents overflows during the while loop for the calculation of
* new_l1_size) */
if (min_size > INT_MAX / sizeof(uint64_t)) {
return -EFBIG;
}
if (exact_size) {
new_l1_size = min_size;
} else {
@ -1360,9 +1367,9 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
nb_clusters = MIN(nb_clusters, s->l2_size - l2_index);
for (i = 0; i < nb_clusters; i++) {
uint64_t old_offset;
uint64_t old_l2_entry;
old_offset = be64_to_cpu(l2_table[l2_index + i]);
old_l2_entry = be64_to_cpu(l2_table[l2_index + i]);
/*
* Make sure that a discarded area reads back as zeroes for v3 images
@ -1373,12 +1380,22 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
* TODO We might want to use bdrv_get_block_status(bs) here, but we're
* holding s->lock, so that doesn't work today.
*/
if (old_offset & QCOW_OFLAG_ZERO) {
continue;
}
switch (qcow2_get_cluster_type(old_l2_entry)) {
case QCOW2_CLUSTER_UNALLOCATED:
if (!bs->backing_hd) {
continue;
}
break;
if ((old_offset & L2E_OFFSET_MASK) == 0 && !bs->backing_hd) {
continue;
case QCOW2_CLUSTER_ZERO:
continue;
case QCOW2_CLUSTER_NORMAL:
case QCOW2_CLUSTER_COMPRESSED:
break;
default:
abort();
}
/* First remove L2 entries */
@ -1390,7 +1407,7 @@ static int discard_single_l2(BlockDriverState *bs, uint64_t offset,
}
/* Then decrease the refcount */
qcow2_free_any_clusters(bs, old_offset, 1, type);
qcow2_free_any_clusters(bs, old_l2_entry, 1, type);
}
ret = qcow2_cache_put(bs, s->l2_table_cache, (void**) &l2_table);

12
block/qcow2-refcount.c
View File

@ -653,6 +653,13 @@ retry:
goto retry;
}
}
/* Make sure that all offsets in the "allocated" range are representable
* in an int64_t */
if (s->free_cluster_index - 1 > (INT64_MAX >> s->cluster_bits)) {
return -EFBIG;
}
#ifdef DEBUG_ALLOC2
fprintf(stderr, "alloc_clusters: size=%" PRId64 " -> %" PRId64 "\n",
size,
@ -1480,6 +1487,11 @@ int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
int ret;
size = bdrv_getlength(bs->file);
if (size < 0) {
res->check_errors++;
return size;
}
nb_clusters = size_to_clusters(s, size);
if (nb_clusters > INT_MAX) {
res->check_errors++;

12
block/qcow2.c
View File

@ -124,8 +124,9 @@ static int qcow2_read_extensions(BlockDriverState *bs, uint64_t start_offset,
case QCOW2_EXT_MAGIC_BACKING_FORMAT:
if (ext.len >= sizeof(bs->backing_format)) {
error_setg(errp, "ERROR: ext_backing_format: len=%u too large"
" (>=%zu)", ext.len, sizeof(bs->backing_format));
error_setg(errp, "ERROR: ext_backing_format: len=%" PRIu32
" too large (>=%zu)", ext.len,
sizeof(bs->backing_format));
return 2;
}
ret = bdrv_pread(bs->file, offset, bs->backing_format, ext.len);
@ -483,7 +484,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
goto fail;
}
if (header.version < 2 || header.version > 3) {
report_unsupported(bs, errp, "QCOW version %d", header.version);
report_unsupported(bs, errp, "QCOW version %" PRIu32, header.version);
ret = -ENOTSUP;
goto fail;
}
@ -493,7 +494,8 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
/* Initialise cluster size */
if (header.cluster_bits < MIN_CLUSTER_BITS ||
header.cluster_bits > MAX_CLUSTER_BITS) {
error_setg(errp, "Unsupported cluster size: 2^%i", header.cluster_bits);
error_setg(errp, "Unsupported cluster size: 2^%" PRIu32,
header.cluster_bits);
ret = -EINVAL;
goto fail;
}
@ -591,7 +593,7 @@ static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
s->refcount_order = header.refcount_order;
if (header.crypt_method > QCOW_CRYPT_AES) {
error_setg(errp, "Unsupported encryption method: %i",
error_setg(errp, "Unsupported encryption method: %" PRIu32,
header.crypt_method);
ret = -EINVAL;
goto fail;

5
block/raw-posix.c
View File

@ -366,7 +366,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
BDRVRawState *s = bs->opaque;
QemuOpts *opts;
Error *local_err = NULL;
const char *filename;
const char *filename = NULL;
int fd, ret;
struct stat st;
@ -446,6 +446,9 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
ret = 0;
fail:
if (filename && (bdrv_flags & BDRV_O_TEMPORARY)) {
unlink(filename);
}
qemu_opts_del(opts);
return ret;
}

3
block/raw-win32.c
View File

@ -390,6 +390,9 @@ static void raw_close(BlockDriverState *bs)
{
BDRVRawState *s = bs->opaque;
CloseHandle(s->hfile);
if (bs->open_flags & BDRV_O_TEMPORARY) {
unlink(bs->filename);
}
}
static int raw_truncate(BlockDriverState *bs, int64_t offset)

6
block/sheepdog.c
View File

@ -1099,7 +1099,7 @@ static int find_vdi_name(BDRVSheepdogState *s, const char *filename,
}
if (rsp->result != SD_RES_SUCCESS) {
error_report("cannot get vdi info, %s, %s %d %s",
error_report("cannot get vdi info, %s, %s %" PRIu32 " %s",
sd_strerror(rsp->result), filename, snapid, tag);
if (rsp->result == SD_RES_NO_VDI) {
ret = -ENOENT;
@ -2316,8 +2316,8 @@ static int sd_snapshot_list(BlockDriverState *bs, QEMUSnapshotInfo **psn_tab)
sn_tab[found].vm_state_size = inode.vm_state_size;
sn_tab[found].vm_clock_nsec = inode.vm_clock_nsec;
snprintf(sn_tab[found].id_str, sizeof(sn_tab[found].id_str), "%u",
inode.snap_id);
snprintf(sn_tab[found].id_str, sizeof(sn_tab[found].id_str),
"%" PRIu32, inode.snap_id);
pstrcpy(sn_tab[found].name,
MIN(sizeof(sn_tab[found].name), sizeof(inode.tag)),
inode.tag);

28
block/vdi.c
View File

@ -408,34 +408,35 @@ static int vdi_open(BlockDriverState *bs, QDict *options, int flags,
}
if (header.signature != VDI_SIGNATURE) {
error_setg(errp, "Image not in VDI format (bad signature %08x)", header.signature);
error_setg(errp, "Image not in VDI format (bad signature %08" PRIx32
")", header.signature);
ret = -EINVAL;
goto fail;
} else if (header.version != VDI_VERSION_1_1) {
error_setg(errp, "unsupported VDI image (version %u.%u)",
header.version >> 16, header.version & 0xffff);
error_setg(errp, "unsupported VDI image (version %" PRIu32 ".%" PRIu32
")", header.version >> 16, header.version & 0xffff);
ret = -ENOTSUP;
goto fail;
} else if (header.offset_bmap % SECTOR_SIZE != 0) {
/* We only support block maps which start on a sector boundary. */
error_setg(errp, "unsupported VDI image (unaligned block map offset "
"0x%x)", header.offset_bmap);
"0x%" PRIx32 ")", header.offset_bmap);
ret = -ENOTSUP;
goto fail;
} else if (header.offset_data % SECTOR_SIZE != 0) {
/* We only support data blocks which start on a sector boundary. */
error_setg(errp, "unsupported VDI image (unaligned data offset 0x%x)",
header.offset_data);
error_setg(errp, "unsupported VDI image (unaligned data offset 0x%"
PRIx32 ")", header.offset_data);
ret = -ENOTSUP;
goto fail;
} else if (header.sector_size != SECTOR_SIZE) {
error_setg(errp, "unsupported VDI image (sector size %u is not %u)",
header.sector_size, SECTOR_SIZE);
error_setg(errp, "unsupported VDI image (sector size %" PRIu32
" is not %u)", header.sector_size, SECTOR_SIZE);
ret = -ENOTSUP;
goto fail;
} else if (header.block_size != DEFAULT_CLUSTER_SIZE) {
error_setg(errp, "unsupported VDI image (block size %u is not %u)",
header.block_size, DEFAULT_CLUSTER_SIZE);
error_setg(errp, "unsupported VDI image (block size %" PRIu32
" is not %u)", header.block_size, DEFAULT_CLUSTER_SIZE);
ret = -ENOTSUP;
goto fail;
} else if (header.disk_size >
@ -755,6 +756,7 @@ static int vdi_create(const char *filename, QEMUOptionParameter *options,
vdi_header_to_le(&header);
if (write(fd, &header, sizeof(header)) < 0) {
result = -errno;
goto close_and_exit;
}
if (bmap_size > 0) {
@ -768,6 +770,8 @@ static int vdi_create(const char *filename, QEMUOptionParameter *options,
}
if (write(fd, bmap, bmap_size) < 0) {
result = -errno;
g_free(bmap);
goto close_and_exit;
}
g_free(bmap);
}
@ -775,10 +779,12 @@ static int vdi_create(const char *filename, QEMUOptionParameter *options,
if (image_type == VDI_TYPE_STATIC) {
if (ftruncate(fd, sizeof(header) + bmap_size + blocks * block_size)) {
result = -errno;
goto close_and_exit;
}
}
if (close(fd) < 0) {
close_and_exit:
if ((close(fd) < 0) && !result) {
result = -errno;
}

1
include/block/block.h
View File

@ -92,6 +92,7 @@ typedef enum {
#define BDRV_O_RDWR 0x0002
#define BDRV_O_SNAPSHOT 0x0008 /* open the file read only and save writes in a snapshot */
#define BDRV_O_TEMPORARY 0x0010 /* delete the file after use */
#define BDRV_O_NOCACHE 0x0020 /* do not use the host page cache */
#define BDRV_O_CACHE_WB 0x0040 /* use write-back caching */
#define BDRV_O_NATIVE_AIO 0x0080 /* use native AIO instead of the thread pool */

1
include/block/block_int.h
View File

@ -299,7 +299,6 @@ struct BlockDriverState {
char backing_file[1024]; /* if non zero, the image is a diff of
this file image */
char backing_format[16]; /* if non-zero and backing_file exists */
int is_temporary;
BlockDriverState *backing_hd;
BlockDriverState *file;

26
qemu-img.c
View File

@ -33,6 +33,9 @@
#include "block/qapi.h"
#include <getopt.h>
#define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION \
", Copyright (c) 2004-2008 Fabrice Bellard\n"
typedef struct img_cmd_t {
const char *name;
int (*handler)(int argc, char **argv);
@ -75,7 +78,7 @@ static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...)
static void QEMU_NORETURN help(void)
{
const char *help_msg =
"qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n"
QEMU_IMG_VERSION
"usage: qemu-img command [command options]\n"
"QEMU disk image utility\n"
"\n"
@ -2789,6 +2792,12 @@ int main(int argc, char **argv)
{
const img_cmd_t *cmd;
const char *cmdname;
int c;
static const struct option long_options[] = {
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
#ifdef CONFIG_POSIX
signal(SIGPIPE, SIG_IGN);
@ -2803,15 +2812,24 @@ int main(int argc, char **argv)
error_exit("Not enough arguments");
}
cmdname = argv[1];
argc--; argv++;
/* find the command */
for(cmd = img_cmds; cmd->name != NULL; cmd++) {
for (cmd = img_cmds; cmd->name != NULL; cmd++) {
if (!strcmp(cmdname, cmd->name)) {
return cmd->handler(argc, argv);
return cmd->handler(argc - 1, argv + 1);
}
}
c = getopt_long(argc, argv, "h", long_options, NULL);
if (c == 'h') {
help();
}
if (c == 'v') {
printf(QEMU_IMG_VERSION);
return 0;
}
/* not found */
error_exit("Command not found: %s", cmdname);
}

2
tests/qemu-iotests/019
View File

@ -96,7 +96,7 @@ mv "$TEST_IMG" "$TEST_IMG.orig"
for backing_option in "-B " "-o backing_file="; do
echo
echo Testing conversion with $backing_option$TEST_IMG.base | _filter_testdir | _filter_imgfmt
echo Testing conversion with $backing_option"$TEST_IMG.base" | _filter_testdir | _filter_imgfmt
echo
$QEMU_IMG convert -O $IMGFMT $backing_option"$TEST_IMG.base" "$TEST_IMG.orig" "$TEST_IMG"

8
tests/qemu-iotests/086
View File

@ -51,10 +51,10 @@ function run_qemu_img()
size=128M
_make_test_img $size
$QEMU_IO -c 'write 0 1M' $TEST_IMG | _filter_qemu_io
$QEMU_IO -c 'write 2M 1M' $TEST_IMG | _filter_qemu_io
$QEMU_IO -c 'write 4M 1M' $TEST_IMG | _filter_qemu_io
$QEMU_IO -c 'write 32M 1M' $TEST_IMG | _filter_qemu_io
$QEMU_IO -c 'write 0 1M' "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c 'write 2M 1M' "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c 'write 4M 1M' "$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c 'write 32M 1M' "$TEST_IMG" | _filter_qemu_io
$QEMU_IMG convert -p -O $IMGFMT -f $IMGFMT "$TEST_IMG" "$TEST_IMG".base 2>&1 |\
_filter_testdir | sed -e 's/\r/\n/g'

61
tests/qemu-iotests/090 Executable file
View File

@ -0,0 +1,61 @@
#!/bin/bash
#
# Test for discarding compressed clusters on qcow2 images
#
# Copyright (C) 2014 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# creator
owner=mreitz@redhat.com
seq="$(basename $0)"
echo "QA output created by $seq"
here="$PWD"
tmp=/tmp/$$
status=1 # failure is the default!
_cleanup()
{
_cleanup_test_img
}
trap "_cleanup; exit \$status" 0 1 2 3 15
# get standard environment, filters and checks
. ./common.rc
. ./common.filter
_supported_fmt qcow2
_supported_proto file
_supported_os Linux
IMG_SIZE=128K
_make_test_img $IMG_SIZE
$QEMU_IO -c 'write -c -P 42 0 64k' \
-c 'write -c -P 23 64k 64k' \
-c 'discard 64k 64k' \
"$TEST_IMG" | _filter_qemu_io
$QEMU_IO -c 'read -P 0 64k 64k' "$TEST_IMG" | _filter_qemu_io
_check_test_img
# success, all done
echo "*** done"
rm -f $seq.full
status=0

12
tests/qemu-iotests/090.out Normal file
View File

@ -0,0 +1,12 @@
QA output created by 090
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=131072
wrote 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
wrote 65536/65536 bytes at offset 65536
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
discard 65536/65536 bytes at offset 65536
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
read 65536/65536 bytes at offset 65536
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
No errors were found on the image.
*** done

4
tests/qemu-iotests/common.rc
View File

@ -178,10 +178,10 @@ _rm_test_img()
local img=$1
if [ "$IMGFMT" = "vmdk" ]; then
# Remove all the extents for vmdk
$QEMU_IMG info $img 2>/dev/null | grep 'filename:' | cut -f 2 -d: \
"$QEMU_IMG" info "$img" 2>/dev/null | grep 'filename:' | cut -f 2 -d: \
| xargs -I {} rm -f "{}"
fi
rm -f $img
rm -f "$img"
}
_cleanup_test_img()

1
tests/qemu-iotests/group
View File

@ -95,3 +95,4 @@
086 rw auto quick
087 rw auto
088 rw auto
090 rw auto quick