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-rw-r--r--block/iscsi.c4
-rw-r--r--block/qcow.c10
-rw-r--r--block/qcow2.c10
-rw-r--r--block/qed.c9
-rw-r--r--block/raw-posix.c225
-rw-r--r--block/raw-win32.c40
-rw-r--r--block/raw.c10
-rw-r--r--block/rbd.c6
-rw-r--r--block/sheepdog.c14
-rw-r--r--block/vdi.c7
-rw-r--r--block/vmdk.c35
-rw-r--r--block/vpc.c7
12 files changed, 286 insertions, 91 deletions
diff --git a/block/iscsi.c b/block/iscsi.c
index fb001b955c..d0b1a10ee4 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -262,10 +262,6 @@ iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num,
acb->task->xfer_dir = SCSI_XFER_WRITE;
acb->task->cdb_size = 16;
acb->task->cdb[0] = 0x8a;
- if (!(bs->open_flags & BDRV_O_CACHE_WB)) {
- /* set FUA on writes when cache mode is write through */
- acb->task->cdb[1] |= 0x04;
- }
lba = sector_qemu2lun(sector_num, iscsilun);
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32);
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff);
diff --git a/block/qcow.c b/block/qcow.c
index 7b5ab87d2d..b239c82ae0 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -197,6 +197,15 @@ static int qcow_open(BlockDriverState *bs, int flags)
return ret;
}
+
+/* We have nothing to do for QCOW reopen, stubs just return
+ * success */
+static int qcow_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ return 0;
+}
+
static int qcow_set_key(BlockDriverState *bs, const char *key)
{
BDRVQcowState *s = bs->opaque;
@@ -868,6 +877,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_probe = qcow_probe,
.bdrv_open = qcow_open,
.bdrv_close = qcow_close,
+ .bdrv_reopen_prepare = qcow_reopen_prepare,
.bdrv_create = qcow_create,
.bdrv_co_readv = qcow_co_readv,
diff --git a/block/qcow2.c b/block/qcow2.c
index 8f183f1465..aa5e603cd3 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -52,6 +52,7 @@ typedef struct {
uint32_t magic;
uint32_t len;
} QCowExtension;
+
#define QCOW2_EXT_MAGIC_END 0
#define QCOW2_EXT_MAGIC_BACKING_FORMAT 0xE2792ACA
#define QCOW2_EXT_MAGIC_FEATURE_TABLE 0x6803f857
@@ -558,6 +559,14 @@ static int qcow2_set_key(BlockDriverState *bs, const char *key)
return 0;
}
+/* We have nothing to do for QCOW2 reopen, stubs just return
+ * success */
+static int qcow2_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ return 0;
+}
+
static int coroutine_fn qcow2_co_is_allocated(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
@@ -1679,6 +1688,7 @@ static BlockDriver bdrv_qcow2 = {
.bdrv_probe = qcow2_probe,
.bdrv_open = qcow2_open,
.bdrv_close = qcow2_close,
+ .bdrv_reopen_prepare = qcow2_reopen_prepare,
.bdrv_create = qcow2_create,
.bdrv_co_is_allocated = qcow2_co_is_allocated,
.bdrv_set_key = qcow2_set_key,
diff --git a/block/qed.c b/block/qed.c
index 21cb239870..6c182ca917 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -505,6 +505,14 @@ out:
return ret;
}
+/* We have nothing to do for QED reopen, stubs just return
+ * success */
+static int bdrv_qed_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ return 0;
+}
+
static void bdrv_qed_close(BlockDriverState *bs)
{
BDRVQEDState *s = bs->opaque;
@@ -1564,6 +1572,7 @@ static BlockDriver bdrv_qed = {
.bdrv_rebind = bdrv_qed_rebind,
.bdrv_open = bdrv_qed_open,
.bdrv_close = bdrv_qed_close,
+ .bdrv_reopen_prepare = bdrv_qed_reopen_prepare,
.bdrv_create = bdrv_qed_create,
.bdrv_co_is_allocated = bdrv_qed_co_is_allocated,
.bdrv_make_empty = bdrv_qed_make_empty,
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 6be20b1925..28d439fa81 100644
--- a/block/raw-posix.c
+++ b/block/raw-posix.c
@@ -133,13 +133,19 @@ typedef struct BDRVRawState {
int use_aio;
void *aio_ctx;
#endif
- uint8_t *aligned_buf;
- unsigned aligned_buf_size;
#ifdef CONFIG_XFS
bool is_xfs : 1;
#endif
} BDRVRawState;
+typedef struct BDRVRawReopenState {
+ int fd;
+ int open_flags;
+#ifdef CONFIG_LINUX_AIO
+ int use_aio;
+#endif
+} BDRVRawReopenState;
+
static int fd_open(BlockDriverState *bs);
static int64_t raw_getlength(BlockDriverState *bs);
@@ -185,6 +191,57 @@ static int raw_normalize_devicepath(const char **filename)
}
#endif
+static void raw_parse_flags(int bdrv_flags, int *open_flags)
+{
+ assert(open_flags != NULL);
+
+ *open_flags |= O_BINARY;
+ *open_flags &= ~O_ACCMODE;
+ if (bdrv_flags & BDRV_O_RDWR) {
+ *open_flags |= O_RDWR;
+ } else {
+ *open_flags |= O_RDONLY;
+ }
+
+ /* Use O_DSYNC for write-through caching, no flags for write-back caching,
+ * and O_DIRECT for no caching. */
+ if ((bdrv_flags & BDRV_O_NOCACHE)) {
+ *open_flags |= O_DIRECT;
+ }
+}
+
+#ifdef CONFIG_LINUX_AIO
+static int raw_set_aio(void **aio_ctx, int *use_aio, int bdrv_flags)
+{
+ int ret = -1;
+ assert(aio_ctx != NULL);
+ assert(use_aio != NULL);
+ /*
+ * Currently Linux do AIO only for files opened with O_DIRECT
+ * specified so check NOCACHE flag too
+ */
+ if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
+ (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
+
+ /* if non-NULL, laio_init() has already been run */
+ if (*aio_ctx == NULL) {
+ *aio_ctx = laio_init();
+ if (!*aio_ctx) {
+ goto error;
+ }
+ }
+ *use_aio = 1;
+ } else {
+ *use_aio = 0;
+ }
+
+ ret = 0;
+
+error:
+ return ret;
+}
+#endif
+
static int raw_open_common(BlockDriverState *bs, const char *filename,
int bdrv_flags, int open_flags)
{
@@ -196,20 +253,8 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
return ret;
}
- s->open_flags = open_flags | O_BINARY;
- s->open_flags &= ~O_ACCMODE;
- if (bdrv_flags & BDRV_O_RDWR) {
- s->open_flags |= O_RDWR;
- } else {
- s->open_flags |= O_RDONLY;
- }
-
- /* Use O_DSYNC for write-through caching, no flags for write-back caching,
- * and O_DIRECT for no caching. */
- if ((bdrv_flags & BDRV_O_NOCACHE))
- s->open_flags |= O_DIRECT;
- if (!(bdrv_flags & BDRV_O_CACHE_WB))
- s->open_flags |= O_DSYNC;
+ s->open_flags = open_flags;
+ raw_parse_flags(bdrv_flags, &s->open_flags);
s->fd = -1;
fd = qemu_open(filename, s->open_flags, 0644);
@@ -220,45 +265,17 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
return ret;
}
s->fd = fd;
- s->aligned_buf = NULL;
-
- if ((bdrv_flags & BDRV_O_NOCACHE)) {
- /*
- * Allocate a buffer for read/modify/write cycles. Chose the size
- * pessimistically as we don't know the block size yet.
- */
- s->aligned_buf_size = 32 * MAX_BLOCKSIZE;
- s->aligned_buf = qemu_memalign(MAX_BLOCKSIZE, s->aligned_buf_size);
- if (s->aligned_buf == NULL) {
- goto out_close;
- }
- }
/* We're falling back to POSIX AIO in some cases so init always */
if (paio_init() < 0) {
- goto out_free_buf;
+ goto out_close;
}
#ifdef CONFIG_LINUX_AIO
- /*
- * Currently Linux do AIO only for files opened with O_DIRECT
- * specified so check NOCACHE flag too
- */
- if ((bdrv_flags & (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) ==
- (BDRV_O_NOCACHE|BDRV_O_NATIVE_AIO)) {
-
- s->aio_ctx = laio_init();
- if (!s->aio_ctx) {
- goto out_free_buf;
- }
- s->use_aio = 1;
- } else
-#endif
- {
-#ifdef CONFIG_LINUX_AIO
- s->use_aio = 0;
-#endif
+ if (raw_set_aio(&s->aio_ctx, &s->use_aio, bdrv_flags)) {
+ goto out_close;
}
+#endif
#ifdef CONFIG_XFS
if (platform_test_xfs_fd(s->fd)) {
@@ -268,8 +285,6 @@ static int raw_open_common(BlockDriverState *bs, const char *filename,
return 0;
-out_free_buf:
- qemu_vfree(s->aligned_buf);
out_close:
qemu_close(fd);
return -errno;
@@ -283,6 +298,109 @@ static int raw_open(BlockDriverState *bs, const char *filename, int flags)
return raw_open_common(bs, filename, flags, 0);
}
+static int raw_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ BDRVRawState *s;
+ BDRVRawReopenState *raw_s;
+ int ret = 0;
+
+ assert(state != NULL);
+ assert(state->bs != NULL);
+
+ s = state->bs->opaque;
+
+ state->opaque = g_malloc0(sizeof(BDRVRawReopenState));
+ raw_s = state->opaque;
+
+#ifdef CONFIG_LINUX_AIO
+ raw_s->use_aio = s->use_aio;
+
+ /* we can use s->aio_ctx instead of a copy, because the use_aio flag is
+ * valid in the 'false' condition even if aio_ctx is set, and raw_set_aio()
+ * won't override aio_ctx if aio_ctx is non-NULL */
+ if (raw_set_aio(&s->aio_ctx, &raw_s->use_aio, state->flags)) {
+ return -1;
+ }
+#endif
+
+ raw_parse_flags(state->flags, &raw_s->open_flags);
+
+ raw_s->fd = -1;
+
+ int fcntl_flags = O_APPEND | O_ASYNC | O_NONBLOCK;
+#ifdef O_NOATIME
+ fcntl_flags |= O_NOATIME;
+#endif
+
+ if ((raw_s->open_flags & ~fcntl_flags) == (s->open_flags & ~fcntl_flags)) {
+ /* dup the original fd */
+ /* TODO: use qemu fcntl wrapper */
+#ifdef F_DUPFD_CLOEXEC
+ raw_s->fd = fcntl(s->fd, F_DUPFD_CLOEXEC, 0);
+#else
+ raw_s->fd = dup(s->fd);
+ if (raw_s->fd != -1) {
+ qemu_set_cloexec(raw_s->fd);
+ }
+#endif
+ if (raw_s->fd >= 0) {
+ ret = fcntl_setfl(raw_s->fd, raw_s->open_flags);
+ if (ret) {
+ qemu_close(raw_s->fd);
+ raw_s->fd = -1;
+ }
+ }
+ }
+
+ /* If we cannot use fcntl, or fcntl failed, fall back to qemu_open() */
+ if (raw_s->fd == -1) {
+ assert(!(raw_s->open_flags & O_CREAT));
+ raw_s->fd = qemu_open(state->bs->filename, raw_s->open_flags);
+ if (raw_s->fd == -1) {
+ ret = -1;
+ }
+ }
+ return ret;
+}
+
+
+static void raw_reopen_commit(BDRVReopenState *state)
+{
+ BDRVRawReopenState *raw_s = state->opaque;
+ BDRVRawState *s = state->bs->opaque;
+
+ s->open_flags = raw_s->open_flags;
+
+ qemu_close(s->fd);
+ s->fd = raw_s->fd;
+#ifdef CONFIG_LINUX_AIO
+ s->use_aio = raw_s->use_aio;
+#endif
+
+ g_free(state->opaque);
+ state->opaque = NULL;
+}
+
+
+static void raw_reopen_abort(BDRVReopenState *state)
+{
+ BDRVRawReopenState *raw_s = state->opaque;
+
+ /* nothing to do if NULL, we didn't get far enough */
+ if (raw_s == NULL) {
+ return;
+ }
+
+ if (raw_s->fd >= 0) {
+ qemu_close(raw_s->fd);
+ raw_s->fd = -1;
+ }
+ g_free(state->opaque);
+ state->opaque = NULL;
+}
+
+
/* XXX: use host sector size if necessary with:
#ifdef DIOCGSECTORSIZE
{
@@ -330,7 +448,7 @@ static BlockDriverAIOCB *raw_aio_submit(BlockDriverState *bs,
* boundary. Check if this is the case or tell the low-level
* driver that it needs to copy the buffer.
*/
- if (s->aligned_buf) {
+ if ((bs->open_flags & BDRV_O_NOCACHE)) {
if (!qiov_is_aligned(bs, qiov)) {
type |= QEMU_AIO_MISALIGNED;
#ifdef CONFIG_LINUX_AIO
@@ -378,8 +496,6 @@ static void raw_close(BlockDriverState *bs)
if (s->fd >= 0) {
qemu_close(s->fd);
s->fd = -1;
- if (s->aligned_buf != NULL)
- qemu_vfree(s->aligned_buf);
}
}
@@ -735,6 +851,9 @@ static BlockDriver bdrv_file = {
.instance_size = sizeof(BDRVRawState),
.bdrv_probe = NULL, /* no probe for protocols */
.bdrv_file_open = raw_open,
+ .bdrv_reopen_prepare = raw_reopen_prepare,
+ .bdrv_reopen_commit = raw_reopen_commit,
+ .bdrv_reopen_abort = raw_reopen_abort,
.bdrv_close = raw_close,
.bdrv_create = raw_create,
.bdrv_co_discard = raw_co_discard,
diff --git a/block/raw-win32.c b/block/raw-win32.c
index c56bf83375..78c830648b 100644
--- a/block/raw-win32.c
+++ b/block/raw-win32.c
@@ -77,6 +77,23 @@ static int set_sparse(int fd)
NULL, 0, NULL, 0, &returned, NULL);
}
+static void raw_parse_flags(int flags, int *access_flags, DWORD *overlapped)
+{
+ assert(access_flags != NULL);
+ assert(overlapped != NULL);
+
+ if (flags & BDRV_O_RDWR) {
+ *access_flags = GENERIC_READ | GENERIC_WRITE;
+ } else {
+ *access_flags = GENERIC_READ;
+ }
+
+ *overlapped = FILE_ATTRIBUTE_NORMAL;
+ if (flags & BDRV_O_NOCACHE) {
+ *overlapped |= FILE_FLAG_NO_BUFFERING;
+ }
+}
+
static int raw_open(BlockDriverState *bs, const char *filename, int flags)
{
BDRVRawState *s = bs->opaque;
@@ -85,17 +102,8 @@ static int raw_open(BlockDriverState *bs, const char *filename, int flags)
s->type = FTYPE_FILE;
- if (flags & BDRV_O_RDWR) {
- access_flags = GENERIC_READ | GENERIC_WRITE;
- } else {
- access_flags = GENERIC_READ;
- }
+ raw_parse_flags(flags, &access_flags, &overlapped);
- overlapped = FILE_ATTRIBUTE_NORMAL;
- if (flags & BDRV_O_NOCACHE)
- overlapped |= FILE_FLAG_NO_BUFFERING;
- if (!(flags & BDRV_O_CACHE_WB))
- overlapped |= FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
OPEN_EXISTING, overlapped, NULL);
@@ -374,18 +382,10 @@ static int hdev_open(BlockDriverState *bs, const char *filename, int flags)
}
s->type = find_device_type(bs, filename);
- if (flags & BDRV_O_RDWR) {
- access_flags = GENERIC_READ | GENERIC_WRITE;
- } else {
- access_flags = GENERIC_READ;
- }
+ raw_parse_flags(flags, &access_flags, &overlapped);
+
create_flags = OPEN_EXISTING;
- overlapped = FILE_ATTRIBUTE_NORMAL;
- if (flags & BDRV_O_NOCACHE)
- overlapped |= FILE_FLAG_NO_BUFFERING;
- if (!(flags & BDRV_O_CACHE_WB))
- overlapped |= FILE_FLAG_WRITE_THROUGH;
s->hfile = CreateFile(filename, access_flags,
FILE_SHARE_READ, NULL,
create_flags, overlapped, NULL);
diff --git a/block/raw.c b/block/raw.c
index ff34ea41e7..253e949b8c 100644
--- a/block/raw.c
+++ b/block/raw.c
@@ -9,6 +9,14 @@ static int raw_open(BlockDriverState *bs, int flags)
return 0;
}
+/* We have nothing to do for raw reopen, stubs just return
+ * success */
+static int raw_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ return 0;
+}
+
static int coroutine_fn raw_co_readv(BlockDriverState *bs, int64_t sector_num,
int nb_sectors, QEMUIOVector *qiov)
{
@@ -115,6 +123,8 @@ static BlockDriver bdrv_raw = {
.bdrv_open = raw_open,
.bdrv_close = raw_close,
+ .bdrv_reopen_prepare = raw_reopen_prepare,
+
.bdrv_co_readv = raw_co_readv,
.bdrv_co_writev = raw_co_writev,
.bdrv_co_is_allocated = raw_co_is_allocated,
diff --git a/block/rbd.c b/block/rbd.c
index 5a0f79fc8f..015a9db0ad 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -487,12 +487,6 @@ static int qemu_rbd_open(BlockDriverState *bs, const char *filename, int flags)
rados_conf_set(s->cluster, "rbd_cache", "false");
} else {
rados_conf_set(s->cluster, "rbd_cache", "true");
- if (!(flags & BDRV_O_CACHE_WB)) {
- r = rados_conf_set(s->cluster, "rbd_cache_max_dirty", "0");
- if (r < 0) {
- rados_conf_set(s->cluster, "rbd_cache", "false");
- }
- }
}
if (strstr(conf, "conf=") == NULL) {
diff --git a/block/sheepdog.c b/block/sheepdog.c
index e0753ee9e5..4742f8ae6f 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1114,14 +1114,12 @@ static int sd_open(BlockDriverState *bs, const char *filename, int flags)
goto out;
}
- if (flags & BDRV_O_CACHE_WB) {
- s->cache_enabled = 1;
- s->flush_fd = connect_to_sdog(s->addr, s->port);
- if (s->flush_fd < 0) {
- error_report("failed to connect");
- ret = s->flush_fd;
- goto out;
- }
+ s->cache_enabled = 1;
+ s->flush_fd = connect_to_sdog(s->addr, s->port);
+ if (s->flush_fd < 0) {
+ error_report("failed to connect");
+ ret = s->flush_fd;
+ goto out;
}
if (snapid || tag[0] != '\0') {
diff --git a/block/vdi.c b/block/vdi.c
index 550cf58a39..f35b12ec98 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -454,6 +454,12 @@ static int vdi_open(BlockDriverState *bs, int flags)
return -1;
}
+static int vdi_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ return 0;
+}
+
static int coroutine_fn vdi_co_is_allocated(BlockDriverState *bs,
int64_t sector_num, int nb_sectors, int *pnum)
{
@@ -761,6 +767,7 @@ static BlockDriver bdrv_vdi = {
.bdrv_probe = vdi_probe,
.bdrv_open = vdi_open,
.bdrv_close = vdi_close,
+ .bdrv_reopen_prepare = vdi_reopen_prepare,
.bdrv_create = vdi_create,
.bdrv_co_is_allocated = vdi_co_is_allocated,
.bdrv_make_empty = vdi_make_empty,
diff --git a/block/vmdk.c b/block/vmdk.c
index bba4c61a74..f2e861b074 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -300,6 +300,40 @@ static int vmdk_is_cid_valid(BlockDriverState *bs)
return 1;
}
+/* Queue extents, if any, for reopen() */
+static int vmdk_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ BDRVVmdkState *s;
+ int ret = -1;
+ int i;
+ VmdkExtent *e;
+
+ assert(state != NULL);
+ assert(state->bs != NULL);
+
+ if (queue == NULL) {
+ error_set(errp, ERROR_CLASS_GENERIC_ERROR,
+ "No reopen queue for VMDK extents");
+ goto exit;
+ }
+
+ s = state->bs->opaque;
+
+ assert(s != NULL);
+
+ for (i = 0; i < s->num_extents; i++) {
+ e = &s->extents[i];
+ if (e->file != state->bs->file) {
+ bdrv_reopen_queue(queue, e->file, state->flags);
+ }
+ }
+ ret = 0;
+
+exit:
+ return ret;
+}
+
static int vmdk_parent_open(BlockDriverState *bs)
{
char *p_name;
@@ -1646,6 +1680,7 @@ static BlockDriver bdrv_vmdk = {
.instance_size = sizeof(BDRVVmdkState),
.bdrv_probe = vmdk_probe,
.bdrv_open = vmdk_open,
+ .bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_read = vmdk_co_read,
.bdrv_write = vmdk_co_write,
.bdrv_close = vmdk_close,
diff --git a/block/vpc.c b/block/vpc.c
index c0b82c4f57..b6bf52f140 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -265,6 +265,12 @@ static int vpc_open(BlockDriverState *bs, int flags)
return err;
}
+static int vpc_reopen_prepare(BDRVReopenState *state,
+ BlockReopenQueue *queue, Error **errp)
+{
+ return 0;
+}
+
/*
* Returns the absolute byte offset of the given sector in the image file.
* If the sector is not allocated, -1 is returned instead.
@@ -783,6 +789,7 @@ static BlockDriver bdrv_vpc = {
.bdrv_probe = vpc_probe,
.bdrv_open = vpc_open,
.bdrv_close = vpc_close,
+ .bdrv_reopen_prepare = vpc_reopen_prepare,
.bdrv_create = vpc_create,
.bdrv_read = vpc_co_read,
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-01 05:51:55 +0000