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Block layer patches:

Browse Source 
- file-posix: Don't waste a file descriptor for locking, don't lock the
   same bit multiple times
 - nvme: Fix double free and memory leak
 - Misc error handling fixes
 - Added NULL checks found by static analysis
 - Allow more block drivers to not be included in the qemu build
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Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

Block layer patches:

- file-posix: Don't waste a file descriptor for locking, don't lock the
  same bit multiple times
- nvme: Fix double free and memory leak
- Misc error handling fixes
- Added NULL checks found by static analysis
- Allow more block drivers to not be included in the qemu build

# gpg: Signature made Mon 12 Nov 2018 17:05:00 GMT
# gpg:                using RSA key 7F09B272C88F2FD6
# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>"
# Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 2FD6

* remotes/kevin/tags/for-upstream:
  qcow2: Read outside array bounds in qcow2_pre_write_overlap_check()
  block: Fix potential Null pointer dereferences in vvfat.c
  qemu-img: assert block_job_get() does not return NULL in img_commit()
  block: Null pointer dereference in blk_root_get_parent_desc()
  job: Fix off-by-one assert checks for JobSTT and JobVerbTable
  block: Make more block drivers compile-time configurable
  tests: Add unit tests for image locking
  file-posix: Drop s->lock_fd
  file-posix: Skip effectiveless OFD lock operations
  nvme: free cmbuf in nvme_exit
  nvme: don't unref ctrl_mem when device unrealized
  blockdev: Consistently use snapshot_node_name in external_snapshot_prepare()
  blockdev: handle error on block latency histogram set error
  file-posix: Use error API properly

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2018-11-12 17:11:22 +00:00
commit 6db87aae61
12 changed files with 400 additions and 93 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
block/Makefile.objs
View File

@ -1,10 +1,18 @@
block-obj-y += raw-format.o qcow.o vdi.o vmdk.o cloop.o bochs.o vpc.o vvfat.o dmg.o
block-obj-y += raw-format.o vmdk.o vpc.o
block-obj-$(CONFIG_QCOW1) += qcow.o
block-obj-$(CONFIG_VDI) += vdi.o
block-obj-$(CONFIG_CLOOP) += cloop.o
block-obj-$(CONFIG_BOCHS) += bochs.o
block-obj-$(CONFIG_VVFAT) += vvfat.o
block-obj-$(CONFIG_DMG) += dmg.o
block-obj-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o qcow2-cache.o qcow2-bitmap.o
block-obj-y += qed.o qed-l2-cache.o qed-table.o qed-cluster.o
block-obj-y += qed-check.o
block-obj-$(CONFIG_QED) += qed.o qed-l2-cache.o qed-table.o qed-cluster.o
block-obj-$(CONFIG_QED) += qed-check.o
block-obj-y += vhdx.o vhdx-endian.o vhdx-log.o
block-obj-y += quorum.o
block-obj-y += parallels.o blkdebug.o blkverify.o blkreplay.o
block-obj-y += blkdebug.o blkverify.o blkreplay.o
block-obj-$(CONFIG_PARALLELS) += parallels.o
block-obj-y += blklogwrites.o
block-obj-y += block-backend.o snapshot.o qapi.o
block-obj-$(CONFIG_WIN32) += file-win32.o win32-aio.o
@ -14,7 +22,8 @@ block-obj-y += null.o mirror.o commit.o io.o create.o
block-obj-y += throttle-groups.o
block-obj-$(CONFIG_LINUX) += nvme.o
block-obj-y += nbd.o nbd-client.o sheepdog.o
block-obj-y += nbd.o nbd-client.o
block-obj-$(CONFIG_SHEEPDOG) += sheepdog.o
block-obj-$(CONFIG_LIBISCSI) += iscsi.o
block-obj-$(if $(CONFIG_LIBISCSI),y,n) += iscsi-opts.o
block-obj-$(CONFIG_LIBNFS) += nfs.o
@ -45,7 +54,8 @@ gluster.o-libs := $(GLUSTERFS_LIBS)
vxhs.o-libs := $(VXHS_LIBS)
ssh.o-cflags := $(LIBSSH2_CFLAGS)
ssh.o-libs := $(LIBSSH2_LIBS)
block-obj-$(if $(CONFIG_BZIP2),m,n) += dmg-bz2.o
block-obj-dmg-bz2-$(CONFIG_BZIP2) += dmg-bz2.o
block-obj-$(if $(CONFIG_DMG),m,n) += $(block-obj-dmg-bz2-y)
dmg-bz2.o-libs := $(BZIP2_LIBS)
qcow.o-libs := -lz
linux-aio.o-libs := -laio

3
block/block-backend.c
View File

@ -918,7 +918,8 @@ char *blk_get_attached_dev_id(BlockBackend *blk)
} else if (dev->id) {
return g_strdup(dev->id);
}
return object_get_canonical_path(OBJECT(dev));
return object_get_canonical_path(OBJECT(dev)) ?: g_strdup("");
}
/*

122
block/file-posix.c
View File

@ -142,7 +142,6 @@ do { \
typedef struct BDRVRawState {
int fd;
int lock_fd;
bool use_lock;
int type;
int open_flags;
@ -152,6 +151,11 @@ typedef struct BDRVRawState {
uint64_t perm;
uint64_t shared_perm;
/* The perms bits whose corresponding bytes are already locked in
* s->fd. */
uint64_t locked_perm;
uint64_t locked_shared_perm;
#ifdef CONFIG_XFS
bool is_xfs:1;
#endif
@ -205,7 +209,7 @@ static int cdrom_reopen(BlockDriverState *bs);
#endif
#if defined(__NetBSD__)
static int raw_normalize_devicepath(const char **filename)
static int raw_normalize_devicepath(const char **filename, Error **errp)
{
static char namebuf[PATH_MAX];
const char *dp, *fname;
@ -214,8 +218,7 @@ static int raw_normalize_devicepath(const char **filename)
fname = *filename;
dp = strrchr(fname, '/');
if (lstat(fname, &sb) < 0) {
fprintf(stderr, "%s: stat failed: %s\n",
fname, strerror(errno));
error_setg_errno(errp, errno, "%s: stat failed", fname);
return -errno;
}
@ -229,14 +232,13 @@ static int raw_normalize_devicepath(const char **filename)
snprintf(namebuf, PATH_MAX, "%.*s/r%s",
(int)(dp - fname), fname, dp + 1);
}
fprintf(stderr, "%s is a block device", fname);
*filename = namebuf;
fprintf(stderr, ", using %s\n", *filename);
warn_report("%s is a block device, using %s", fname, *filename);
return 0;
}
#else
static int raw_normalize_devicepath(const char **filename)
static int raw_normalize_devicepath(const char **filename, Error **errp)
{
return 0;
}
@ -461,9 +463,8 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
filename = qemu_opt_get(opts, "filename");
ret = raw_normalize_devicepath(&filename);
ret = raw_normalize_devicepath(&filename, errp);
if (ret != 0) {
error_setg_errno(errp, -ret, "Could not normalize device path");
goto fail;
}
@ -492,11 +493,10 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
case ON_OFF_AUTO_ON:
s->use_lock = true;
if (!qemu_has_ofd_lock()) {
fprintf(stderr,
"File lock requested but OFD locking syscall is "
"unavailable, falling back to POSIX file locks.\n"
"Due to the implementation, locks can be lost "
"unexpectedly.\n");
warn_report("File lock requested but OFD locking syscall is "
"unavailable, falling back to POSIX file locks");
error_printf("Due to the implementation, locks can be lost "
"unexpectedly.\n");
}
break;
case ON_OFF_AUTO_OFF:
@ -550,18 +550,6 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
}
s->fd = fd;
s->lock_fd = -1;
if (s->use_lock) {
fd = qemu_open(filename, s->open_flags);
if (fd < 0) {
ret = -errno;
error_setg_errno(errp, errno, "Could not open '%s' for locking",
filename);
qemu_close(s->fd);
goto fail;
}
s->lock_fd = fd;
}
s->perm = 0;
s->shared_perm = BLK_PERM_ALL;
@ -693,43 +681,72 @@ typedef enum {
* file; if @unlock == true, also unlock the unneeded bytes.
* @shared_perm_lock_bits is the mask of all permissions that are NOT shared.
*/
static int raw_apply_lock_bytes(int fd,
static int raw_apply_lock_bytes(BDRVRawState *s, int fd,
uint64_t perm_lock_bits,
uint64_t shared_perm_lock_bits,
bool unlock, Error **errp)
{
int ret;
int i;
uint64_t locked_perm, locked_shared_perm;
if (s) {
locked_perm = s->locked_perm;
locked_shared_perm = s->locked_shared_perm;
} else {
/*
* We don't have the previous bits, just lock/unlock for each of the
* requested bits.
*/
if (unlock) {
locked_perm = BLK_PERM_ALL;
locked_shared_perm = BLK_PERM_ALL;
} else {
locked_perm = 0;
locked_shared_perm = 0;
}
}
PERM_FOREACH(i) {
int off = RAW_LOCK_PERM_BASE + i;
if (perm_lock_bits & (1ULL << i)) {
uint64_t bit = (1ULL << i);
if ((perm_lock_bits & bit) && !(locked_perm & bit)) {
ret = qemu_lock_fd(fd, off, 1, false);
if (ret) {
error_setg(errp, "Failed to lock byte %d", off);
return ret;
} else if (s) {
s->locked_perm |= bit;
}
} else if (unlock) {
} else if (unlock && (locked_perm & bit) && !(perm_lock_bits & bit)) {
ret = qemu_unlock_fd(fd, off, 1);
if (ret) {
error_setg(errp, "Failed to unlock byte %d", off);
return ret;
} else if (s) {
s->locked_perm &= ~bit;
}
}
}
PERM_FOREACH(i) {
int off = RAW_LOCK_SHARED_BASE + i;
if (shared_perm_lock_bits & (1ULL << i)) {
uint64_t bit = (1ULL << i);
if ((shared_perm_lock_bits & bit) && !(locked_shared_perm & bit)) {
ret = qemu_lock_fd(fd, off, 1, false);
if (ret) {
error_setg(errp, "Failed to lock byte %d", off);
return ret;
} else if (s) {
s->locked_shared_perm |= bit;
}
} else if (unlock) {
} else if (unlock && (locked_shared_perm & bit) &&
!(shared_perm_lock_bits & bit)) {
ret = qemu_unlock_fd(fd, off, 1);
if (ret) {
error_setg(errp, "Failed to unlock byte %d", off);
return ret;
} else if (s) {
s->locked_shared_perm &= ~bit;
}
}
}
@ -793,15 +810,13 @@ static int raw_handle_perm_lock(BlockDriverState *bs,
return 0;
}
assert(s->lock_fd > 0);
switch (op) {
case RAW_PL_PREPARE:
ret = raw_apply_lock_bytes(s->lock_fd, s->perm | new_perm,
ret = raw_apply_lock_bytes(s, s->fd, s->perm | new_perm,
~s->shared_perm | ~new_shared,
false, errp);
if (!ret) {
ret = raw_check_lock_bytes(s->lock_fd, new_perm, new_shared, errp);
ret = raw_check_lock_bytes(s->fd, new_perm, new_shared, errp);
if (!ret) {
return 0;
}
@ -812,23 +827,23 @@ static int raw_handle_perm_lock(BlockDriverState *bs,
op = RAW_PL_ABORT;
/* fall through to unlock bytes. */
case RAW_PL_ABORT:
raw_apply_lock_bytes(s->lock_fd, s->perm, ~s->shared_perm,
raw_apply_lock_bytes(s, s->fd, s->perm, ~s->shared_perm,
true, &local_err);
if (local_err) {
/* Theoretically the above call only unlocks bytes and it cannot
* fail. Something weird happened, report it.
*/
error_report_err(local_err);
warn_report_err(local_err);
}
break;
case RAW_PL_COMMIT:
raw_apply_lock_bytes(s->lock_fd, new_perm, ~new_shared,
raw_apply_lock_bytes(s, s->fd, new_perm, ~new_shared,
true, &local_err);
if (local_err) {
/* Theoretically the above call only unlocks bytes and it cannot
* fail. Something weird happened, report it.
*/
error_report_err(local_err);
warn_report_err(local_err);
}
break;
}
@ -905,10 +920,8 @@ static int raw_reopen_prepare(BDRVReopenState *state,
/* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
if (rs->fd == -1) {
const char *normalized_filename = state->bs->filename;
ret = raw_normalize_devicepath(&normalized_filename);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not normalize device path");
} else {
ret = raw_normalize_devicepath(&normalized_filename, errp);
if (ret >= 0) {
assert(!(rs->open_flags & O_CREAT));
rs->fd = qemu_open(normalized_filename, rs->open_flags);
if (rs->fd == -1) {
@ -939,10 +952,18 @@ static void raw_reopen_commit(BDRVReopenState *state)
{
BDRVRawReopenState *rs = state->opaque;
BDRVRawState *s = state->bs->opaque;
Error *local_err = NULL;
s->check_cache_dropped = rs->check_cache_dropped;
s->open_flags = rs->open_flags;
/* Copy locks to the new fd before closing the old one. */
raw_apply_lock_bytes(NULL, rs->fd, s->locked_perm,
~s->locked_shared_perm, false, &local_err);
if (local_err) {
/* shouldn't fail in a sane host, but report it just in case. */
error_report_err(local_err);
}
qemu_close(s->fd);
s->fd = rs->fd;
@ -1788,7 +1809,7 @@ static int aio_worker(void *arg)
ret = handle_aiocb_truncate(aiocb);
break;
default:
fprintf(stderr, "invalid aio request (0x%x)\n", aiocb->aio_type);
error_report("invalid aio request (0x%x)", aiocb->aio_type);
ret = -EINVAL;
break;
}
@ -1935,10 +1956,6 @@ static void raw_close(BlockDriverState *bs)
qemu_close(s->fd);
s->fd = -1;
}
if (s->lock_fd >= 0) {
qemu_close(s->lock_fd);
s->lock_fd = -1;
}
}
/**
@ -2226,7 +2243,7 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
shared = BLK_PERM_ALL & ~BLK_PERM_RESIZE;
/* Step one: Take locks */
result = raw_apply_lock_bytes(fd, perm, ~shared, false, errp);
result = raw_apply_lock_bytes(NULL, fd, perm, ~shared, false, errp);
if (result < 0) {
goto out_close;
}
@ -2270,13 +2287,13 @@ raw_co_create(BlockdevCreateOptions *options, Error **errp)
}
out_unlock:
raw_apply_lock_bytes(fd, 0, 0, true, &local_err);
raw_apply_lock_bytes(NULL, fd, 0, 0, true, &local_err);
if (local_err) {
/* The above call should not fail, and if it does, that does
* not mean the whole creation operation has failed. So
* report it the user for their convenience, but do not report
* it to the caller. */
error_report_err(local_err);
warn_report_err(local_err);
}
out_close:
@ -3141,9 +3158,8 @@ static int coroutine_fn hdev_co_create_opts(const char *filename, QemuOpts *opts
(void)has_prefix;
ret = raw_normalize_devicepath(&filename);
ret = raw_normalize_devicepath(&filename, errp);
if (ret < 0) {
error_setg_errno(errp, -ret, "Could not normalize device path");
return ret;
}

18
block/qcow2-refcount.c
View File

@ -2719,15 +2719,17 @@ int qcow2_check_metadata_overlap(BlockDriverState *bs, int ign, int64_t offset,
}
static const char *metadata_ol_names[] = {
[QCOW2_OL_MAIN_HEADER_BITNR] = "qcow2_header",
[QCOW2_OL_ACTIVE_L1_BITNR] = "active L1 table",
[QCOW2_OL_ACTIVE_L2_BITNR] = "active L2 table",
[QCOW2_OL_REFCOUNT_TABLE_BITNR] = "refcount table",
[QCOW2_OL_REFCOUNT_BLOCK_BITNR] = "refcount block",
[QCOW2_OL_SNAPSHOT_TABLE_BITNR] = "snapshot table",
[QCOW2_OL_INACTIVE_L1_BITNR] = "inactive L1 table",
[QCOW2_OL_INACTIVE_L2_BITNR] = "inactive L2 table",
[QCOW2_OL_MAIN_HEADER_BITNR] = "qcow2_header",
[QCOW2_OL_ACTIVE_L1_BITNR] = "active L1 table",
[QCOW2_OL_ACTIVE_L2_BITNR] = "active L2 table",
[QCOW2_OL_REFCOUNT_TABLE_BITNR] = "refcount table",
[QCOW2_OL_REFCOUNT_BLOCK_BITNR] = "refcount block",
[QCOW2_OL_SNAPSHOT_TABLE_BITNR] = "snapshot table",
[QCOW2_OL_INACTIVE_L1_BITNR] = "inactive L1 table",
[QCOW2_OL_INACTIVE_L2_BITNR] = "inactive L2 table",
[QCOW2_OL_BITMAP_DIRECTORY_BITNR] = "bitmap directory",
};
QEMU_BUILD_BUG_ON(QCOW2_OL_MAX_BITNR != ARRAY_SIZE(metadata_ol_names));
/*
* First performs a check for metadata overlaps (through

46
block/vvfat.c
View File

@ -100,30 +100,26 @@ static inline void array_free(array_t* array)
/* does not automatically grow */
static inline void* array_get(array_t* array,unsigned int index) {
assert(index < array->next);
assert(array->pointer);
return array->pointer + index * array->item_size;
}
static inline int array_ensure_allocated(array_t* array, int index)
static inline void array_ensure_allocated(array_t *array, int index)
{
if((index + 1) * array->item_size > array->size) {
int new_size = (index + 32) * array->item_size;
array->pointer = g_realloc(array->pointer, new_size);
if (!array->pointer)
return -1;
assert(array->pointer);
memset(array->pointer + array->size, 0, new_size - array->size);
array->size = new_size;
array->next = index + 1;
}
return 0;
}
static inline void* array_get_next(array_t* array) {
unsigned int next = array->next;
if (array_ensure_allocated(array, next) < 0)
return NULL;
array_ensure_allocated(array, next);
array->next = next + 1;
return array_get(array, next);
}
@ -2422,16 +2418,13 @@ static int commit_direntries(BDRVVVFATState* s,
direntry_t* direntry = array_get(&(s->directory), dir_index);
uint32_t first_cluster = dir_index == 0 ? 0 : begin_of_direntry(direntry);
mapping_t* mapping = find_mapping_for_cluster(s, first_cluster);
int factor = 0x10 * s->sectors_per_cluster;
int old_cluster_count, new_cluster_count;
int current_dir_index = mapping->info.dir.first_dir_index;
int first_dir_index = current_dir_index;
int current_dir_index;
int first_dir_index;
int ret, i;
uint32_t c;
DLOG(fprintf(stderr, "commit_direntries for %s, parent_mapping_index %d\n", mapping->path, parent_mapping_index));
assert(direntry);
assert(mapping);
assert(mapping->begin == first_cluster);
@ -2439,6 +2432,11 @@ DLOG(fprintf(stderr, "commit_direntries for %s, parent_mapping_index %d\n", mapp
assert(mapping->mode & MODE_DIRECTORY);
assert(dir_index == 0 || is_directory(direntry));
DLOG(fprintf(stderr, "commit_direntries for %s, parent_mapping_index %d\n",
mapping->path, parent_mapping_index));
current_dir_index = mapping->info.dir.first_dir_index;
first_dir_index = current_dir_index;
mapping->info.dir.parent_mapping_index = parent_mapping_index;
if (first_cluster == 0) {
@ -2488,6 +2486,9 @@ DLOG(fprintf(stderr, "commit_direntries for %s, parent_mapping_index %d\n", mapp
direntry = array_get(&(s->directory), first_dir_index + i);
if (is_directory(direntry) && !is_dot(direntry)) {
mapping = find_mapping_for_cluster(s, first_cluster);
if (mapping == NULL) {
return -1;
}
assert(mapping->mode & MODE_DIRECTORY);
ret = commit_direntries(s, first_dir_index + i,
array_index(&(s->mapping), mapping));
@ -2516,6 +2517,10 @@ static int commit_one_file(BDRVVVFATState* s,
assert(offset < size);
assert((offset % s->cluster_size) == 0);
if (mapping == NULL) {
return -1;
}
for (i = s->cluster_size; i < offset; i += s->cluster_size)
c = modified_fat_get(s, c);
@ -2662,8 +2667,12 @@ static int handle_renames_and_mkdirs(BDRVVVFATState* s)
if (commit->action == ACTION_RENAME) {
mapping_t* mapping = find_mapping_for_cluster(s,
commit->param.rename.cluster);
char* old_path = mapping->path;
char *old_path;
if (mapping == NULL) {
return -1;
}
old_path = mapping->path;
assert(commit->path);
mapping->path = commit->path;
if (rename(old_path, mapping->path))
@ -2684,10 +2693,15 @@ static int handle_renames_and_mkdirs(BDRVVVFATState* s)
direntry_t* d = direntry + i;
if (is_file(d) || (is_directory(d) && !is_dot(d))) {
int l;
char *new_path;
mapping_t* m = find_mapping_for_cluster(s,
begin_of_direntry(d));
int l = strlen(m->path);
char* new_path = g_malloc(l + diff + 1);
if (m == NULL) {
return -1;
}
l = strlen(m->path);
new_path = g_malloc(l + diff + 1);
assert(!strncmp(m->path, mapping->path, l2));

21
blockdev.c
View File

@ -1640,7 +1640,7 @@ static void external_snapshot_prepare(BlkActionState *common,
}
options = qdict_new();
if (s->has_snapshot_node_name) {
if (snapshot_node_name) {
qdict_put_str(options, "node-name", snapshot_node_name);
}
qdict_put_str(options, "driver", format);
@ -4413,6 +4413,7 @@ void qmp_x_block_latency_histogram_set(
{
BlockBackend *blk = blk_by_name(device);
BlockAcctStats *stats;
int ret;
if (!blk) {
error_setg(errp, "Device '%s' not found", device);
@ -4428,21 +4429,33 @@ void qmp_x_block_latency_histogram_set(
}
if (has_boundaries || has_boundaries_read) {
block_latency_histogram_set(
ret = block_latency_histogram_set(
stats, BLOCK_ACCT_READ,
has_boundaries_read ? boundaries_read : boundaries);
if (ret) {
error_setg(errp, "Device '%s' set read boundaries fail", device);
return;
}
}
if (has_boundaries || has_boundaries_write) {
block_latency_histogram_set(
ret = block_latency_histogram_set(
stats, BLOCK_ACCT_WRITE,
has_boundaries_write ? boundaries_write : boundaries);
if (ret) {
error_setg(errp, "Device '%s' set write boundaries fail", device);
return;
}
}
if (has_boundaries || has_boundaries_flush) {
block_latency_histogram_set(
ret = block_latency_histogram_set(
stats, BLOCK_ACCT_FLUSH,
has_boundaries_flush ? boundaries_flush : boundaries);
if (ret) {
error_setg(errp, "Device '%s' set flush boundaries fail", device);
return;
}
}
}

91
configure vendored
View File

@ -470,6 +470,15 @@ tcmalloc="no"
jemalloc="no"
replication="yes"
vxhs=""
bochs="yes"
cloop="yes"
dmg="yes"
qcow1="yes"
vdi="yes"
vvfat="yes"
qed="yes"
parallels="yes"
sheepdog="yes"
libxml2=""
docker="no"
debug_mutex="no"
@ -1416,6 +1425,42 @@ for opt do
;;
--enable-vxhs) vxhs="yes"
;;
--disable-bochs) bochs="no"
;;
--enable-bochs) bochs="yes"
;;
--disable-cloop) cloop="no"
;;
--enable-cloop) cloop="yes"
;;
--disable-dmg) dmg="no"
;;
--enable-dmg) dmg="yes"
;;
--disable-qcow1) qcow1="no"
;;
--enable-qcow1) qcow1="yes"
;;
--disable-vdi) vdi="no"
;;
--enable-vdi) vdi="yes"
;;
--disable-vvfat) vvfat="no"
;;
--enable-vvfat) vvfat="yes"
;;
--disable-qed) qed="no"
;;
--enable-qed) qed="yes"
;;
--disable-parallels) parallels="no"
;;
--enable-parallels) parallels="yes"
;;
--disable-sheepdog) sheepdog="no"
;;
--enable-sheepdog) sheepdog="yes"
;;
--disable-vhost-user) vhost_user="no"
;;
--enable-vhost-user)
@ -1718,6 +1763,15 @@ disabled with --disable-FEATURE, default is enabled if available:
qom-cast-debug cast debugging support
tools build qemu-io, qemu-nbd and qemu-image tools
vxhs Veritas HyperScale vDisk backend support
bochs bochs image format support
cloop cloop image format support
dmg dmg image format support
qcow1 qcow v1 image format support
vdi vdi image format support
vvfat vvfat image format support
qed qed image format support
parallels parallels image format support
sheepdog sheepdog block driver support
crypto-afalg Linux AF_ALG crypto backend driver
vhost-user vhost-user support
capstone capstone disassembler support
@ -6043,6 +6097,15 @@ echo "jemalloc support $jemalloc"
echo "avx2 optimization $avx2_opt"
echo "replication support $replication"
echo "VxHS block device $vxhs"
echo "bochs support $bochs"
echo "cloop support $cloop"
echo "dmg support $dmg"
echo "qcow v1 support $qcow1"
echo "vdi support $vdi"
echo "vvfat support $vvfat"
echo "qed support $qed"
echo "parallels support $parallels"
echo "sheepdog support $sheepdog"
echo "capstone $capstone"
echo "docker $docker"
echo "libpmem support $libpmem"
@ -6799,6 +6862,34 @@ if test "$libpmem" = "yes" ; then
echo "CONFIG_LIBPMEM=y" >> $config_host_mak
fi
if test "$bochs" = "yes" ; then
echo "CONFIG_BOCHS=y" >> $config_host_mak
fi
if test "$cloop" = "yes" ; then
echo "CONFIG_CLOOP=y" >> $config_host_mak
fi
if test "$dmg" = "yes" ; then
echo "CONFIG_DMG=y" >> $config_host_mak
fi
if test "$qcow1" = "yes" ; then
echo "CONFIG_QCOW1=y" >> $config_host_mak
fi
if test "$vdi" = "yes" ; then
echo "CONFIG_VDI=y" >> $config_host_mak
fi
if test "$vvfat" = "yes" ; then
echo "CONFIG_VVFAT=y" >> $config_host_mak
fi
if test "$qed" = "yes" ; then
echo "CONFIG_QED=y" >> $config_host_mak
fi
if test "$parallels" = "yes" ; then
echo "CONFIG_PARALLELS=y" >> $config_host_mak
fi
if test "$sheepdog" = "yes" ; then
echo "CONFIG_SHEEPDOG=y" >> $config_host_mak
fi
if test "$tcg_interpreter" = "yes"; then
QEMU_INCLUDES="-iquote \$(SRC_PATH)/tcg/tci $QEMU_INCLUDES"
elif test "$ARCH" = "sparc64" ; then

6
hw/block/nvme.c
View File

@ -1331,10 +1331,10 @@ static void nvme_exit(PCIDevice *pci_dev)
g_free(n->namespaces);
g_free(n->cq);
g_free(n->sq);
if (n->cmbsz) {
memory_region_unref(&n->ctrl_mem);
}
if (n->cmb_size_mb) {
g_free(n->cmbuf);
}
msix_uninit_exclusive_bar(pci_dev);
}

4
job.c
View File

@ -159,7 +159,7 @@ bool job_is_internal(Job *job)
static void job_state_transition(Job *job, JobStatus s1)
{
JobStatus s0 = job->status;
assert(s1 >= 0 && s1 <= JOB_STATUS__MAX);
assert(s1 >= 0 && s1 < JOB_STATUS__MAX);
trace_job_state_transition(job, job->ret,
JobSTT[s0][s1] ? "allowed" : "disallowed",
JobStatus_str(s0), JobStatus_str(s1));
@ -174,7 +174,7 @@ static void job_state_transition(Job *job, JobStatus s1)
int job_apply_verb(Job *job, JobVerb verb, Error **errp)
{
JobStatus s0 = job->status;
assert(verb >= 0 && verb <= JOB_VERB__MAX);
assert(verb >= 0 && verb < JOB_VERB__MAX);
trace_job_apply_verb(job, JobStatus_str(s0), JobVerb_str(verb),
JobVerbTable[verb][s0] ? "allowed" : "prohibited");
if (JobVerbTable[verb][s0]) {

1
qemu-img.c
View File

@ -1029,6 +1029,7 @@ static int img_commit(int argc, char **argv)
}
job = block_job_get("commit");
assert(job);
run_block_job(job, &local_err);
if (local_err) {
goto unref_backing;

2
tests/Makefile.include
View File

@ -70,6 +70,7 @@ check-unit-y += tests/test-bdrv-drain$(EXESUF)
check-unit-y += tests/test-blockjob$(EXESUF)
check-unit-y += tests/test-blockjob-txn$(EXESUF)
check-unit-y += tests/test-block-backend$(EXESUF)
check-unit-y += tests/test-image-locking$(EXESUF)
check-unit-y += tests/test-x86-cpuid$(EXESUF)
# all code tested by test-x86-cpuid is inside topology.h
ifeq ($(CONFIG_SOFTMMU),y)
@ -537,6 +538,7 @@ tests/test-bdrv-drain$(EXESUF): tests/test-bdrv-drain.o $(test-block-obj-y) $(te
tests/test-blockjob$(EXESUF): tests/test-blockjob.o $(test-block-obj-y) $(test-util-obj-y)
tests/test-blockjob-txn$(EXESUF): tests/test-blockjob-txn.o $(test-block-obj-y) $(test-util-obj-y)
tests/test-block-backend$(EXESUF): tests/test-block-backend.o $(test-block-obj-y) $(test-util-obj-y)
tests/test-image-locking$(EXESUF): tests/test-image-locking.o $(test-block-obj-y) $(test-util-obj-y)
tests/test-thread-pool$(EXESUF): tests/test-thread-pool.o $(test-block-obj-y)
tests/test-iov$(EXESUF): tests/test-iov.o $(test-util-obj-y)
tests/test-hbitmap$(EXESUF): tests/test-hbitmap.o $(test-util-obj-y) $(test-crypto-obj-y)

157
tests/test-image-locking.c Normal file
View File

@ -0,0 +1,157 @@
/*
* Image locking tests
*
* Copyright (c) 2018 Red Hat Inc.
*
* Author: Fam Zheng <famz@redhat.com>
*
* 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/osdep.h"
#include "block/block.h"
#include "sysemu/block-backend.h"
#include "qapi/error.h"
#include "qapi/qmp/qdict.h"
static BlockBackend *open_image(const char *path,
uint64_t perm, uint64_t shared_perm,
Error **errp)
{
Error *local_err = NULL;
BlockBackend *blk;
QDict *options = qdict_new();
qdict_put_str(options, "driver", "raw");
blk = blk_new_open(path, NULL, options, BDRV_O_RDWR, &local_err);
if (blk) {
g_assert_null(local_err);
if (blk_set_perm(blk, perm, shared_perm, errp)) {
blk_unref(blk);
blk = NULL;
}
} else {
error_propagate(errp, local_err);
}
return blk;
}
static void check_locked_bytes(int fd, uint64_t perm_locks,
uint64_t shared_perm_locks)
{
int i;
if (!perm_locks && !shared_perm_locks) {
g_assert(!qemu_lock_fd_test(fd, 0, 0, true));
return;
}
for (i = 0; (1ULL << i) <= BLK_PERM_ALL; i++) {
uint64_t bit = (1ULL << i);
bool perm_expected = !!(bit & perm_locks);
bool shared_perm_expected = !!(bit & shared_perm_locks);
g_assert_cmpint(perm_expected, ==,
!!qemu_lock_fd_test(fd, 100 + i, 1, true));
g_assert_cmpint(shared_perm_expected, ==,
!!qemu_lock_fd_test(fd, 200 + i, 1, true));
}
}
static void test_image_locking_basic(void)
{
BlockBackend *blk1, *blk2, *blk3;
char img_path[] = "/tmp/qtest.XXXXXX";
uint64_t perm, shared_perm;
int fd = mkstemp(img_path);
assert(fd >= 0);
perm = BLK_PERM_WRITE | BLK_PERM_CONSISTENT_READ;
shared_perm = BLK_PERM_ALL;
blk1 = open_image(img_path, perm, shared_perm, &error_abort);
g_assert(blk1);
check_locked_bytes(fd, perm, ~shared_perm);
/* compatible perm between blk1 and blk2 */
blk2 = open_image(img_path, perm | BLK_PERM_RESIZE, shared_perm, NULL);
g_assert(blk2);
check_locked_bytes(fd, perm | BLK_PERM_RESIZE, ~shared_perm);
/* incompatible perm with already open blk1 and blk2 */
blk3 = open_image(img_path, perm, BLK_PERM_WRITE_UNCHANGED, NULL);
g_assert_null(blk3);
blk_unref(blk2);
/* Check that extra bytes in blk2 are correctly unlocked */
check_locked_bytes(fd, perm, ~shared_perm);
blk_unref(blk1);
/* Image is unused, no lock there */
check_locked_bytes(fd, 0, 0);
blk3 = open_image(img_path, perm, BLK_PERM_WRITE_UNCHANGED, &error_abort);
g_assert(blk3);
blk_unref(blk3);
close(fd);
unlink(img_path);
}
static void test_set_perm_abort(void)
{
BlockBackend *blk1, *blk2;
char img_path[] = "/tmp/qtest.XXXXXX";
uint64_t perm, shared_perm;
int r;
int fd = mkstemp(img_path);
assert(fd >= 0);
perm = BLK_PERM_WRITE | BLK_PERM_CONSISTENT_READ;
shared_perm = BLK_PERM_ALL;
blk1 = open_image(img_path, perm, shared_perm, &error_abort);
g_assert(blk1);
blk2 = open_image(img_path, perm, shared_perm, &error_abort);
g_assert(blk2);
check_locked_bytes(fd, perm, ~shared_perm);
/* A failed blk_set_perm mustn't change perm status (locked bytes) */
r = blk_set_perm(blk2, perm | BLK_PERM_RESIZE, BLK_PERM_WRITE_UNCHANGED,
NULL);
g_assert_cmpint(r, !=, 0);
check_locked_bytes(fd, perm, ~shared_perm);
blk_unref(blk1);
blk_unref(blk2);
}
int main(int argc, char **argv)
{
bdrv_init();
qemu_init_main_loop(&error_abort);
g_test_init(&argc, &argv, NULL);
if (qemu_has_ofd_lock()) {
g_test_add_func("/image-locking/basic", test_image_locking_basic);
g_test_add_func("/image-locking/set-perm-abort", test_set_perm_abort);
}
return g_test_run();
}