* [Qemu-devel] [PATCH 1/8] block: rename .bdrv_create() to .bdrv_co_create_opts()
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-01 19:23 ` Eric Blake
2018-03-01 16:36 ` [Qemu-devel] [PATCH 2/8] qcow2: make qcow2_co_create2() a coroutine_fn Paolo Bonzini
` (8 subsequent siblings)
9 siblings, 1 reply; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf, Stefan Hajnoczi
From: Stefan Hajnoczi <stefanha@redhat.com>
BlockDriver->bdrv_create() has been called from coroutine context since
commit 5b7e1542cfa41a281af9629d31cef03704d976e6 ("block: make
bdrv_create adopt coroutine").
Make this explicit by renaming to .bdrv_co_create_opts() and add the
coroutine_fn annotation. This makes it obvious to block driver authors
that they may yield, use CoMutex, or other coroutine_fn APIs.
bdrv_co_create is reserved for the QAPI-based version that Kevin is
working on.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20170705102231.20711-2-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1516279431-30424-2-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block.c | 4 ++--
block/crypto.c | 8 ++++----
block/file-posix.c | 15 ++++++++-------
block/file-win32.c | 5 +++--
block/gluster.c | 12 ++++++------
block/iscsi.c | 7 ++++---
block/nfs.c | 5 +++--
block/parallels.c | 7 +++++--
block/qcow.c | 5 +++--
block/qcow2.c | 5 +++--
block/qed.c | 6 ++++--
block/raw-format.c | 5 +++--
block/rbd.c | 6 ++++--
block/sheepdog.c | 10 +++++-----
block/ssh.c | 5 +++--
block/vdi.c | 5 +++--
block/vhdx.c | 5 +++--
block/vmdk.c | 5 +++--
block/vpc.c | 5 +++--
include/block/block_int.h | 3 ++-
20 files changed, 74 insertions(+), 54 deletions(-)
diff --git a/block.c b/block.c
index 814e5a02da..e713fe3d00 100644
--- a/block.c
+++ b/block.c
@@ -420,7 +420,7 @@ static void coroutine_fn bdrv_create_co_entry(void *opaque)
CreateCo *cco = opaque;
assert(cco->drv);
- ret = cco->drv->bdrv_create(cco->filename, cco->opts, &local_err);
+ ret = cco->drv->bdrv_co_create_opts(cco->filename, cco->opts, &local_err);
error_propagate(&cco->err, local_err);
cco->ret = ret;
}
@@ -439,7 +439,7 @@ int bdrv_create(BlockDriver *drv, const char* filename,
.err = NULL,
};
- if (!drv->bdrv_create) {
+ if (!drv->bdrv_co_create_opts) {
error_setg(errp, "Driver '%s' does not support image creation", drv->format_name);
ret = -ENOTSUP;
goto out;
diff --git a/block/crypto.c b/block/crypto.c
index 3df66947c5..2ea116e6db 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -556,9 +556,9 @@ static int block_crypto_open_luks(BlockDriverState *bs,
bs, options, flags, errp);
}
-static int block_crypto_create_luks(const char *filename,
- QemuOpts *opts,
- Error **errp)
+static int coroutine_fn block_crypto_co_create_opts_luks(const char *filename,
+ QemuOpts *opts,
+ Error **errp)
{
return block_crypto_create_generic(Q_CRYPTO_BLOCK_FORMAT_LUKS,
filename, opts, errp);
@@ -617,7 +617,7 @@ BlockDriver bdrv_crypto_luks = {
.bdrv_open = block_crypto_open_luks,
.bdrv_close = block_crypto_close,
.bdrv_child_perm = bdrv_format_default_perms,
- .bdrv_create = block_crypto_create_luks,
+ .bdrv_co_create_opts = block_crypto_co_create_opts_luks,
.bdrv_truncate = block_crypto_truncate,
.create_opts = &block_crypto_create_opts_luks,
diff --git a/block/file-posix.c b/block/file-posix.c
index ca49c1a98a..c775bf9272 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -1982,7 +1982,8 @@ static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
return (int64_t)st.st_blocks * 512;
}
-static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn raw_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int fd;
int result = 0;
@@ -2280,7 +2281,7 @@ BlockDriver bdrv_file = {
.bdrv_reopen_commit = raw_reopen_commit,
.bdrv_reopen_abort = raw_reopen_abort,
.bdrv_close = raw_close,
- .bdrv_create = raw_create,
+ .bdrv_co_create_opts = raw_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = raw_co_get_block_status,
.bdrv_co_pwrite_zeroes = raw_co_pwrite_zeroes,
@@ -2684,8 +2685,8 @@ static coroutine_fn int hdev_co_pwrite_zeroes(BlockDriverState *bs,
return -ENOTSUP;
}
-static int hdev_create(const char *filename, QemuOpts *opts,
- Error **errp)
+static int coroutine_fn hdev_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int fd;
int ret = 0;
@@ -2758,7 +2759,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_reopen_prepare = raw_reopen_prepare,
.bdrv_reopen_commit = raw_reopen_commit,
.bdrv_reopen_abort = raw_reopen_abort,
- .bdrv_create = hdev_create,
+ .bdrv_co_create_opts = hdev_co_create_opts,
.create_opts = &raw_create_opts,
.bdrv_co_pwrite_zeroes = hdev_co_pwrite_zeroes,
@@ -2880,7 +2881,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_reopen_prepare = raw_reopen_prepare,
.bdrv_reopen_commit = raw_reopen_commit,
.bdrv_reopen_abort = raw_reopen_abort,
- .bdrv_create = hdev_create,
+ .bdrv_co_create_opts = hdev_co_create_opts,
.create_opts = &raw_create_opts,
@@ -3011,7 +3012,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_reopen_prepare = raw_reopen_prepare,
.bdrv_reopen_commit = raw_reopen_commit,
.bdrv_reopen_abort = raw_reopen_abort,
- .bdrv_create = hdev_create,
+ .bdrv_co_create_opts = hdev_co_create_opts,
.create_opts = &raw_create_opts,
.bdrv_co_preadv = raw_co_preadv,
diff --git a/block/file-win32.c b/block/file-win32.c
index f24c7bb92c..4a430d45f1 100644
--- a/block/file-win32.c
+++ b/block/file-win32.c
@@ -553,7 +553,8 @@ static int64_t raw_get_allocated_file_size(BlockDriverState *bs)
return st.st_size;
}
-static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn raw_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int fd;
int64_t total_size = 0;
@@ -599,7 +600,7 @@ BlockDriver bdrv_file = {
.bdrv_file_open = raw_open,
.bdrv_refresh_limits = raw_probe_alignment,
.bdrv_close = raw_close,
- .bdrv_create = raw_create,
+ .bdrv_co_create_opts = raw_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_aio_readv = raw_aio_readv,
diff --git a/block/gluster.c b/block/gluster.c
index d8decc41ad..133d9f1d2e 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -965,8 +965,8 @@ static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs,
}
#endif
-static int qemu_gluster_create(const char *filename,
- QemuOpts *opts, Error **errp)
+static int coroutine_fn qemu_gluster_co_create_opts(const char *filename,
+ QemuOpts *opts, Error **errp)
{
BlockdevOptionsGluster *gconf;
struct glfs *glfs;
@@ -1427,7 +1427,7 @@ static BlockDriver bdrv_gluster = {
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
@@ -1455,7 +1455,7 @@ static BlockDriver bdrv_gluster_tcp = {
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
@@ -1483,7 +1483,7 @@ static BlockDriver bdrv_gluster_unix = {
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
@@ -1517,7 +1517,7 @@ static BlockDriver bdrv_gluster_rdma = {
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_reopen_abort = qemu_gluster_reopen_abort,
.bdrv_close = qemu_gluster_close,
- .bdrv_create = qemu_gluster_create,
+ .bdrv_co_create_opts = qemu_gluster_co_create_opts,
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
diff --git a/block/iscsi.c b/block/iscsi.c
index 421983dd6f..662f441997 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -2108,7 +2108,8 @@ static int iscsi_truncate(BlockDriverState *bs, int64_t offset,
return 0;
}
-static int iscsi_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn iscsi_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int ret = 0;
int64_t total_size = 0;
@@ -2195,7 +2196,7 @@ static BlockDriver bdrv_iscsi = {
.bdrv_parse_filename = iscsi_parse_filename,
.bdrv_file_open = iscsi_open,
.bdrv_close = iscsi_close,
- .bdrv_create = iscsi_create,
+ .bdrv_co_create_opts = iscsi_co_create_opts,
.create_opts = &iscsi_create_opts,
.bdrv_reopen_prepare = iscsi_reopen_prepare,
.bdrv_reopen_commit = iscsi_reopen_commit,
@@ -2230,7 +2231,7 @@ static BlockDriver bdrv_iser = {
.bdrv_parse_filename = iscsi_parse_filename,
.bdrv_file_open = iscsi_open,
.bdrv_close = iscsi_close,
- .bdrv_create = iscsi_create,
+ .bdrv_co_create_opts = iscsi_co_create_opts,
.create_opts = &iscsi_create_opts,
.bdrv_reopen_prepare = iscsi_reopen_prepare,
.bdrv_reopen_commit = iscsi_reopen_commit,
diff --git a/block/nfs.c b/block/nfs.c
index 6576a73d6e..ce6e195a41 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -684,7 +684,8 @@ static QemuOptsList nfs_create_opts = {
}
};
-static int nfs_file_create(const char *url, QemuOpts *opts, Error **errp)
+static int coroutine_fn nfs_file_co_create_opts(const char *url, QemuOpts *opts,
+ Error **errp)
{
int64_t ret, total_size;
NFSClient *client = g_new0(NFSClient, 1);
@@ -897,7 +898,7 @@ static BlockDriver bdrv_nfs = {
.bdrv_file_open = nfs_file_open,
.bdrv_close = nfs_file_close,
- .bdrv_create = nfs_file_create,
+ .bdrv_co_create_opts = nfs_file_co_create_opts,
.bdrv_reopen_prepare = nfs_reopen_prepare,
.bdrv_co_preadv = nfs_co_preadv,
diff --git a/block/parallels.c b/block/parallels.c
index e1e3d80c88..c3095bd9c0 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -467,7 +467,9 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
}
-static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn parallels_co_create_opts(const char *filename,
+ QemuOpts *opts,
+ Error **errp)
{
int64_t total_size, cl_size;
uint8_t tmp[BDRV_SECTOR_SIZE];
@@ -788,7 +790,8 @@ static BlockDriver bdrv_parallels = {
.bdrv_co_readv = parallels_co_readv,
.bdrv_co_writev = parallels_co_writev,
.supports_backing = true,
- .bdrv_create = parallels_create,
+
+ .bdrv_co_create_opts = parallels_co_create_opts,
.bdrv_check = parallels_check,
.create_opts = ¶llels_create_opts,
};
diff --git a/block/qcow.c b/block/qcow.c
index 8631155ac8..186316edd0 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -805,7 +805,8 @@ static void qcow_close(BlockDriverState *bs)
error_free(s->migration_blocker);
}
-static int qcow_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn qcow_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int header_size, backing_filename_len, l1_size, shift, i;
QCowHeader header;
@@ -1122,7 +1123,7 @@ static BlockDriver bdrv_qcow = {
.bdrv_close = qcow_close,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_reopen_prepare = qcow_reopen_prepare,
- .bdrv_create = qcow_create,
+ .bdrv_co_create_opts = qcow_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.supports_backing = true,
diff --git a/block/qcow2.c b/block/qcow2.c
index 801e29fc56..d62705d9aa 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2891,7 +2891,8 @@ out:
return ret;
}
-static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn qcow2_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
char *backing_file = NULL;
char *backing_fmt = NULL;
@@ -4327,7 +4328,7 @@ BlockDriver bdrv_qcow2 = {
.bdrv_reopen_abort = qcow2_reopen_abort,
.bdrv_join_options = qcow2_join_options,
.bdrv_child_perm = bdrv_format_default_perms,
- .bdrv_create = qcow2_create,
+ .bdrv_co_create_opts = qcow2_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = qcow2_co_get_block_status,
diff --git a/block/qed.c b/block/qed.c
index c6ff3ab015..dd31c5046e 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -638,7 +638,9 @@ out:
return ret;
}
-static int bdrv_qed_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn bdrv_qed_co_create_opts(const char *filename,
+ QemuOpts *opts,
+ Error **errp)
{
uint64_t image_size = 0;
uint32_t cluster_size = QED_DEFAULT_CLUSTER_SIZE;
@@ -1592,7 +1594,7 @@ static BlockDriver bdrv_qed = {
.bdrv_close = bdrv_qed_close,
.bdrv_reopen_prepare = bdrv_qed_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
- .bdrv_create = bdrv_qed_create,
+ .bdrv_co_create_opts = bdrv_qed_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = bdrv_qed_co_get_block_status,
.bdrv_co_readv = bdrv_qed_co_readv,
diff --git a/block/raw-format.c b/block/raw-format.c
index ab552c0954..e0debbdc8b 100644
--- a/block/raw-format.c
+++ b/block/raw-format.c
@@ -396,7 +396,8 @@ static int raw_has_zero_init(BlockDriverState *bs)
return bdrv_has_zero_init(bs->file->bs);
}
-static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn raw_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
return bdrv_create_file(filename, opts, errp);
}
@@ -491,7 +492,7 @@ BlockDriver bdrv_raw = {
.bdrv_open = &raw_open,
.bdrv_close = &raw_close,
.bdrv_child_perm = bdrv_filter_default_perms,
- .bdrv_create = &raw_create,
+ .bdrv_co_create_opts = &raw_co_create_opts,
.bdrv_co_preadv = &raw_co_preadv,
.bdrv_co_pwritev = &raw_co_pwritev,
.bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes,
diff --git a/block/rbd.c b/block/rbd.c
index 8474b0ba11..c7dd32e213 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -351,7 +351,9 @@ static QemuOptsList runtime_opts = {
},
};
-static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn qemu_rbd_co_create_opts(const char *filename,
+ QemuOpts *opts,
+ Error **errp)
{
Error *local_err = NULL;
int64_t bytes = 0;
@@ -1132,7 +1134,7 @@ static BlockDriver bdrv_rbd = {
.bdrv_file_open = qemu_rbd_open,
.bdrv_close = qemu_rbd_close,
.bdrv_reopen_prepare = qemu_rbd_reopen_prepare,
- .bdrv_create = qemu_rbd_create,
+ .bdrv_co_create_opts = qemu_rbd_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_get_info = qemu_rbd_getinfo,
.create_opts = &qemu_rbd_create_opts,
diff --git a/block/sheepdog.c b/block/sheepdog.c
index af125a2c8d..4fab125578 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -1965,8 +1965,8 @@ static int parse_block_size_shift(BDRVSheepdogState *s, QemuOpts *opt)
return 0;
}
-static int sd_create(const char *filename, QemuOpts *opts,
- Error **errp)
+static int coroutine_fn sd_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
Error *err = NULL;
int ret = 0;
@@ -3087,7 +3087,7 @@ static BlockDriver bdrv_sheepdog = {
.bdrv_reopen_commit = sd_reopen_commit,
.bdrv_reopen_abort = sd_reopen_abort,
.bdrv_close = sd_close,
- .bdrv_create = sd_create,
+ .bdrv_co_create_opts = sd_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_getlength = sd_getlength,
.bdrv_get_allocated_file_size = sd_get_allocated_file_size,
@@ -3123,7 +3123,7 @@ static BlockDriver bdrv_sheepdog_tcp = {
.bdrv_reopen_commit = sd_reopen_commit,
.bdrv_reopen_abort = sd_reopen_abort,
.bdrv_close = sd_close,
- .bdrv_create = sd_create,
+ .bdrv_co_create_opts = sd_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_getlength = sd_getlength,
.bdrv_get_allocated_file_size = sd_get_allocated_file_size,
@@ -3159,7 +3159,7 @@ static BlockDriver bdrv_sheepdog_unix = {
.bdrv_reopen_commit = sd_reopen_commit,
.bdrv_reopen_abort = sd_reopen_abort,
.bdrv_close = sd_close,
- .bdrv_create = sd_create,
+ .bdrv_co_create_opts = sd_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_getlength = sd_getlength,
.bdrv_get_allocated_file_size = sd_get_allocated_file_size,
diff --git a/block/ssh.c b/block/ssh.c
index b63addcf94..36d5d888d5 100644
--- a/block/ssh.c
+++ b/block/ssh.c
@@ -816,7 +816,8 @@ static QemuOptsList ssh_create_opts = {
}
};
-static int ssh_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn ssh_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int r, ret;
int64_t total_size = 0;
@@ -1204,7 +1205,7 @@ static BlockDriver bdrv_ssh = {
.instance_size = sizeof(BDRVSSHState),
.bdrv_parse_filename = ssh_parse_filename,
.bdrv_file_open = ssh_file_open,
- .bdrv_create = ssh_create,
+ .bdrv_co_create_opts = ssh_co_create_opts,
.bdrv_close = ssh_close,
.bdrv_has_zero_init = ssh_has_zero_init,
.bdrv_co_readv = ssh_co_readv,
diff --git a/block/vdi.c b/block/vdi.c
index fc1c614cb1..0fa98d5ffe 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -717,7 +717,8 @@ nonallocating_write:
return ret;
}
-static int vdi_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn vdi_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int ret = 0;
uint64_t bytes = 0;
@@ -895,7 +896,7 @@ static BlockDriver bdrv_vdi = {
.bdrv_close = vdi_close,
.bdrv_reopen_prepare = vdi_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
- .bdrv_create = vdi_create,
+ .bdrv_co_create_opts = vdi_co_create_opts,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_co_get_block_status = vdi_co_get_block_status,
.bdrv_make_empty = vdi_make_empty,
diff --git a/block/vhdx.c b/block/vhdx.c
index c449c5dcfd..3fbff5048b 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1792,7 +1792,8 @@ exit:
* .---- ~ ----------- ~ ------------ ~ ---------------- ~ -----------.
* 1MB
*/
-static int vhdx_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn vhdx_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int ret = 0;
uint64_t image_size = (uint64_t) 2 * GiB;
@@ -2003,7 +2004,7 @@ static BlockDriver bdrv_vhdx = {
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_co_readv = vhdx_co_readv,
.bdrv_co_writev = vhdx_co_writev,
- .bdrv_create = vhdx_create,
+ .bdrv_co_create_opts = vhdx_co_create_opts,
.bdrv_get_info = vhdx_get_info,
.bdrv_check = vhdx_check,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
diff --git a/block/vmdk.c b/block/vmdk.c
index ef15ddbfd3..a3f7610082 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -1892,7 +1892,8 @@ static int filename_decompose(const char *filename, char *path, char *prefix,
return VMDK_OK;
}
-static int vmdk_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn vmdk_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
int idx = 0;
BlockBackend *new_blk = NULL;
@@ -2408,7 +2409,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed,
.bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes,
.bdrv_close = vmdk_close,
- .bdrv_create = vmdk_create,
+ .bdrv_co_create_opts = vmdk_co_create_opts,
.bdrv_co_flush_to_disk = vmdk_co_flush,
.bdrv_co_get_block_status = vmdk_co_get_block_status,
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
diff --git a/block/vpc.c b/block/vpc.c
index cfa5144e86..9e53c47d60 100644
--- a/block/vpc.c
+++ b/block/vpc.c
@@ -896,7 +896,8 @@ static int create_fixed_disk(BlockBackend *blk, uint8_t *buf,
return ret;
}
-static int vpc_create(const char *filename, QemuOpts *opts, Error **errp)
+static int coroutine_fn vpc_co_create_opts(const char *filename, QemuOpts *opts,
+ Error **errp)
{
uint8_t buf[1024];
VHDFooter *footer = (VHDFooter *) buf;
@@ -1094,7 +1095,7 @@ static BlockDriver bdrv_vpc = {
.bdrv_close = vpc_close,
.bdrv_reopen_prepare = vpc_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
- .bdrv_create = vpc_create,
+ .bdrv_co_create_opts = vpc_co_create_opts,
.bdrv_co_preadv = vpc_co_preadv,
.bdrv_co_pwritev = vpc_co_pwritev,
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 5ea63f8fa8..f80683ded2 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -128,7 +128,8 @@ struct BlockDriver {
int (*bdrv_file_open)(BlockDriverState *bs, QDict *options, int flags,
Error **errp);
void (*bdrv_close)(BlockDriverState *bs);
- int (*bdrv_create)(const char *filename, QemuOpts *opts, Error **errp);
+ int coroutine_fn (*bdrv_co_create_opts)(const char *filename, QemuOpts *opts,
+ Error **errp);
int (*bdrv_make_empty)(BlockDriverState *bs);
void (*bdrv_refresh_filename)(BlockDriverState *bs, QDict *options);
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* Re: [Qemu-devel] [PATCH 1/8] block: rename .bdrv_create() to .bdrv_co_create_opts()
2018-03-01 16:36 ` [Qemu-devel] [PATCH 1/8] block: rename .bdrv_create() to .bdrv_co_create_opts() Paolo Bonzini
@ 2018-03-01 19:23 ` Eric Blake
0 siblings, 0 replies; 15+ messages in thread
From: Eric Blake @ 2018-03-01 19:23 UTC (permalink / raw)
To: Paolo Bonzini, qemu-devel; +Cc: kwolf, Stefan Hajnoczi, qemu-block
On 03/01/2018 10:36 AM, Paolo Bonzini wrote:
> From: Stefan Hajnoczi <stefanha@redhat.com>
>
> BlockDriver->bdrv_create() has been called from coroutine context since
> commit 5b7e1542cfa41a281af9629d31cef03704d976e6 ("block: make
> bdrv_create adopt coroutine").
>
> Make this explicit by renaming to .bdrv_co_create_opts() and add the
> coroutine_fn annotation. This makes it obvious to block driver authors
> that they may yield, use CoMutex, or other coroutine_fn APIs.
> bdrv_co_create is reserved for the QAPI-based version that Kevin is
> working on.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> Message-Id: <20170705102231.20711-2-stefanha@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Message-Id: <1516279431-30424-2-git-send-email-pbonzini@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Fun with repeated Message-Id and S-o-B ;)
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Qemu-devel] [PATCH 2/8] qcow2: make qcow2_co_create2() a coroutine_fn
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
2018-03-01 16:36 ` [Qemu-devel] [PATCH 1/8] block: rename .bdrv_create() to .bdrv_co_create_opts() Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-01 22:56 ` Eric Blake
2018-03-01 16:36 ` [Qemu-devel] [PATCH 3/8] qcow2: introduce qcow2_write_caches and qcow2_flush_caches Paolo Bonzini
` (7 subsequent siblings)
9 siblings, 1 reply; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf, Stefan Hajnoczi
From: Stefan Hajnoczi <stefanha@redhat.com>
qcow2_create2() calls qemu_co_mutex_lock(). Only a coroutine_fn may
call another coroutine_fn. In fact, qcow2_create2 is always called from
coroutine context.
Rename the function to add the "co" moniker and add coroutine_fn.
Reported-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20170705102231.20711-3-stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1516279431-30424-3-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block/qcow2.c | 17 +++++++++--------
1 file changed, 9 insertions(+), 8 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index d62705d9aa..24edbb431b 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2700,11 +2700,12 @@ static uint64_t qcow2_opt_get_refcount_bits_del(QemuOpts *opts, int version,
return refcount_bits;
}
-static int qcow2_create2(const char *filename, int64_t total_size,
- const char *backing_file, const char *backing_format,
- int flags, size_t cluster_size, PreallocMode prealloc,
- QemuOpts *opts, int version, int refcount_order,
- const char *encryptfmt, Error **errp)
+static int coroutine_fn
+qcow2_co_create2(const char *filename, int64_t total_size,
+ const char *backing_file, const char *backing_format,
+ int flags, size_t cluster_size, PreallocMode prealloc,
+ QemuOpts *opts, int version, int refcount_order,
+ const char *encryptfmt, Error **errp)
{
QDict *options;
@@ -2973,9 +2974,9 @@ static int coroutine_fn qcow2_co_create_opts(const char *filename, QemuOpts *opt
refcount_order = ctz32(refcount_bits);
- ret = qcow2_create2(filename, size, backing_file, backing_fmt, flags,
- cluster_size, prealloc, opts, version, refcount_order,
- encryptfmt, &local_err);
+ ret = qcow2_co_create2(filename, size, backing_file, backing_fmt, flags,
+ cluster_size, prealloc, opts, version, refcount_order,
+ encryptfmt, &local_err);
error_propagate(errp, local_err);
finish:
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* Re: [Qemu-devel] [PATCH 2/8] qcow2: make qcow2_co_create2() a coroutine_fn
2018-03-01 16:36 ` [Qemu-devel] [PATCH 2/8] qcow2: make qcow2_co_create2() a coroutine_fn Paolo Bonzini
@ 2018-03-01 22:56 ` Eric Blake
0 siblings, 0 replies; 15+ messages in thread
From: Eric Blake @ 2018-03-01 22:56 UTC (permalink / raw)
To: Paolo Bonzini, qemu-devel; +Cc: kwolf, Stefan Hajnoczi, qemu-block
On 03/01/2018 10:36 AM, Paolo Bonzini wrote:
> From: Stefan Hajnoczi <stefanha@redhat.com>
>
> qcow2_create2() calls qemu_co_mutex_lock(). Only a coroutine_fn may
> call another coroutine_fn. In fact, qcow2_create2 is always called from
> coroutine context.
>
> Rename the function to add the "co" moniker and add coroutine_fn.
>
> Reported-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> Message-Id: <20170705102231.20711-3-stefanha@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Message-Id: <1516279431-30424-3-git-send-email-pbonzini@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
More of the funny double-Message-Id/S-o-b.
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Qemu-devel] [PATCH 3/8] qcow2: introduce qcow2_write_caches and qcow2_flush_caches
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
2018-03-01 16:36 ` [Qemu-devel] [PATCH 1/8] block: rename .bdrv_create() to .bdrv_co_create_opts() Paolo Bonzini
2018-03-01 16:36 ` [Qemu-devel] [PATCH 2/8] qcow2: make qcow2_co_create2() a coroutine_fn Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-02 1:33 ` Eric Blake
2018-03-01 16:36 ` [Qemu-devel] [PATCH 4/8] qcow2: fix flushing after dirty bitmap metadata writes Paolo Bonzini
` (6 subsequent siblings)
9 siblings, 1 reply; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf
They will be used to avoid recursively taking s->lock during
bdrv_open or bdrv_check.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1516279431-30424-7-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block/qcow2-refcount.c | 28 ++++++++++++++++++++++++++++
block/qcow2.c | 20 ++++----------------
block/qcow2.h | 2 ++
3 files changed, 34 insertions(+), 16 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 92701ab7af..6482ade7fa 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -1172,7 +1172,35 @@ void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
}
}
+int coroutine_fn qcow2_write_caches(BlockDriverState *bs)
+{
+ BDRVQcow2State *s = bs->opaque;
+ int ret;
+ ret = qcow2_cache_write(bs, s->l2_table_cache);
+ if (ret < 0) {
+ return ret;
+ }
+
+ if (qcow2_need_accurate_refcounts(s)) {
+ ret = qcow2_cache_write(bs, s->refcount_block_cache);
+ if (ret < 0) {
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+int coroutine_fn qcow2_flush_caches(BlockDriverState *bs)
+{
+ int ret = qcow2_write_caches(bs);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return bdrv_flush(bs->file->bs);
+}
/*********************************************************/
/* snapshots and image creation */
diff --git a/block/qcow2.c b/block/qcow2.c
index 24edbb431b..4c216ecd63 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -502,7 +502,7 @@ static int qcow2_mark_clean(BlockDriverState *bs)
s->incompatible_features &= ~QCOW2_INCOMPAT_DIRTY;
- ret = bdrv_flush(bs);
+ ret = qcow2_flush_caches(bs);
if (ret < 0) {
return ret;
}
@@ -532,7 +532,7 @@ int qcow2_mark_consistent(BlockDriverState *bs)
BDRVQcow2State *s = bs->opaque;
if (s->incompatible_features & QCOW2_INCOMPAT_CORRUPT) {
- int ret = bdrv_flush(bs);
+ int ret = qcow2_flush_caches(bs);
if (ret < 0) {
return ret;
}
@@ -3624,22 +3624,10 @@ static coroutine_fn int qcow2_co_flush_to_os(BlockDriverState *bs)
int ret;
qemu_co_mutex_lock(&s->lock);
- ret = qcow2_cache_write(bs, s->l2_table_cache);
- if (ret < 0) {
- qemu_co_mutex_unlock(&s->lock);
- return ret;
- }
-
- if (qcow2_need_accurate_refcounts(s)) {
- ret = qcow2_cache_write(bs, s->refcount_block_cache);
- if (ret < 0) {
- qemu_co_mutex_unlock(&s->lock);
- return ret;
- }
- }
+ ret = qcow2_write_caches(bs);
qemu_co_mutex_unlock(&s->lock);
- return 0;
+ return ret;
}
static BlockMeasureInfo *qcow2_measure(QemuOpts *opts, BlockDriverState *in_bs,
diff --git a/block/qcow2.h b/block/qcow2.h
index 46c8cf44ec..25b50f8c01 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -570,6 +570,8 @@ void qcow2_free_any_clusters(BlockDriverState *bs, uint64_t l2_entry,
int qcow2_update_snapshot_refcount(BlockDriverState *bs,
int64_t l1_table_offset, int l1_size, int addend);
+int coroutine_fn qcow2_flush_caches(BlockDriverState *bs);
+int coroutine_fn qcow2_write_caches(BlockDriverState *bs);
int qcow2_check_refcounts(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix);
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* Re: [Qemu-devel] [PATCH 3/8] qcow2: introduce qcow2_write_caches and qcow2_flush_caches
2018-03-01 16:36 ` [Qemu-devel] [PATCH 3/8] qcow2: introduce qcow2_write_caches and qcow2_flush_caches Paolo Bonzini
@ 2018-03-02 1:33 ` Eric Blake
0 siblings, 0 replies; 15+ messages in thread
From: Eric Blake @ 2018-03-02 1:33 UTC (permalink / raw)
To: Paolo Bonzini, qemu-devel; +Cc: kwolf, qemu-block
On 03/01/2018 10:36 AM, Paolo Bonzini wrote:
> They will be used to avoid recursively taking s->lock during
> bdrv_open or bdrv_check.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> Message-Id: <1516279431-30424-7-git-send-email-pbonzini@redhat.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
> block/qcow2-refcount.c | 28 ++++++++++++++++++++++++++++
> block/qcow2.c | 20 ++++----------------
> block/qcow2.h | 2 ++
> 3 files changed, 34 insertions(+), 16 deletions(-)
>
Reviewed-by: Eric Blake <eblake@redhat.com>
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
^ permalink raw reply [flat|nested] 15+ messages in thread
* [Qemu-devel] [PATCH 4/8] qcow2: fix flushing after dirty bitmap metadata writes
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
` (2 preceding siblings ...)
2018-03-01 16:36 ` [Qemu-devel] [PATCH 3/8] qcow2: introduce qcow2_write_caches and qcow2_flush_caches Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-01 16:36 ` [Qemu-devel] [PATCH 5/8] qcow2: make qcow2_do_open a coroutine_fn Paolo Bonzini
` (5 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf
update_header_sync itself does not need to flush the caches to disk.
The only paths that allocate clusters are:
- bitmap_list_store with in_place=false, called by update_ext_header_and_dir
- store_bitmap_data, called by store_bitmap
- store_bitmap, called by qcow2_store_persistent_dirty_bitmaps and
followed by update_ext_header_and_dir
So in the end the central place where we need to flush the caches
is update_ext_header_and_dir.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block/qcow2-bitmap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/qcow2-bitmap.c b/block/qcow2-bitmap.c
index efa10c6663..a2dbd9fab4 100644
--- a/block/qcow2-bitmap.c
+++ b/block/qcow2-bitmap.c
@@ -110,7 +110,7 @@ static int update_header_sync(BlockDriverState *bs)
return ret;
}
- return bdrv_flush(bs);
+ return bdrv_flush(bs->file->bs);
}
static inline void bitmap_table_to_be(uint64_t *bitmap_table, size_t size)
@@ -882,7 +882,7 @@ static int update_ext_header_and_dir(BlockDriverState *bs,
return ret;
}
- ret = bdrv_flush(bs->file->bs);
+ ret = qcow2_flush_caches(bs);
if (ret < 0) {
goto fail;
}
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* [Qemu-devel] [PATCH 5/8] qcow2: make qcow2_do_open a coroutine_fn
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
` (3 preceding siblings ...)
2018-03-01 16:36 ` [Qemu-devel] [PATCH 4/8] qcow2: fix flushing after dirty bitmap metadata writes Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-01 16:36 ` [Qemu-devel] [PATCH 6/8] qed: make bdrv_qed_do_open " Paolo Bonzini
` (4 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf
It is called from qcow2_invalidate_cache in coroutine context (incoming
migration runs in a coroutine), so it's cleaner if metadata is always
loaded from a coroutine.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1516279431-30424-4-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block/qcow2.c | 46 +++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 41 insertions(+), 5 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index 4c216ecd63..b5410c5b00 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -1097,8 +1097,9 @@ static int qcow2_update_options(BlockDriverState *bs, QDict *options,
return ret;
}
-static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
+/* Called with s->lock held. */
+static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
+ int flags, Error **errp)
{
BDRVQcow2State *s = bs->opaque;
unsigned int len, i;
@@ -1477,8 +1478,6 @@ static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
}
}
- /* Initialise locks */
- qemu_co_mutex_init(&s->lock);
bs->supported_zero_flags = header.version >= 3 ? BDRV_REQ_MAY_UNMAP : 0;
/* Repair image if dirty */
@@ -1524,16 +1523,53 @@ static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
return ret;
}
+typedef struct QCow2OpenCo {
+ BlockDriverState *bs;
+ QDict *options;
+ int flags;
+ Error **errp;
+ int ret;
+} QCow2OpenCo;
+
+static void coroutine_fn qcow2_open_entry(void *opaque)
+{
+ QCow2OpenCo *qoc = opaque;
+ BDRVQcow2State *s = qoc->bs->opaque;
+
+ qemu_co_mutex_lock(&s->lock);
+ qoc->ret = qcow2_do_open(qoc->bs, qoc->options, qoc->flags, qoc->errp);
+ qemu_co_mutex_unlock(&s->lock);
+}
+
static int qcow2_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
+ BDRVQcow2State *s = bs->opaque;
+ QCow2OpenCo qoc = {
+ .bs = bs,
+ .options = options,
+ .flags = flags,
+ .errp = errp,
+ .ret = -EINPROGRESS
+ };
+
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
return -EINVAL;
}
- return qcow2_do_open(bs, options, flags, errp);
+ /* Initialise locks */
+ qemu_co_mutex_init(&s->lock);
+
+ if (qemu_in_coroutine()) {
+ /* From bdrv_co_create. */
+ qcow2_open_entry(&qoc);
+ } else {
+ qemu_coroutine_enter(qemu_coroutine_create(qcow2_open_entry, &qoc));
+ BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
+ }
+ return qoc.ret;
}
static void qcow2_refresh_limits(BlockDriverState *bs, Error **errp)
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* [Qemu-devel] [PATCH 6/8] qed: make bdrv_qed_do_open a coroutine_fn
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
` (4 preceding siblings ...)
2018-03-01 16:36 ` [Qemu-devel] [PATCH 5/8] qcow2: make qcow2_do_open a coroutine_fn Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-01 16:36 ` [Qemu-devel] [PATCH 7/8] block: convert bdrv_invalidate_cache callback to coroutine_fn Paolo Bonzini
` (3 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf
It is called from qed_invalidate_cache in coroutine context (incoming
migration runs in a coroutine), so it's cleaner if metadata is always
loaded from a coroutine.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1516279431-30424-5-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block/qed.c | 40 +++++++++++++++++++++++++++++++++++++---
1 file changed, 37 insertions(+), 3 deletions(-)
diff --git a/block/qed.c b/block/qed.c
index dd31c5046e..d379c8c2f0 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -381,8 +381,9 @@ static void bdrv_qed_init_state(BlockDriverState *bs)
qemu_co_queue_init(&s->allocating_write_reqs);
}
-static int bdrv_qed_do_open(BlockDriverState *bs, QDict *options, int flags,
- Error **errp)
+/* Called with table_lock held. */
+static int coroutine_fn bdrv_qed_do_open(BlockDriverState *bs, QDict *options,
+ int flags, Error **errp)
{
BDRVQEDState *s = bs->opaque;
QEDHeader le_header;
@@ -513,9 +514,35 @@ out:
return ret;
}
+typedef struct QEDOpenCo {
+ BlockDriverState *bs;
+ QDict *options;
+ int flags;
+ Error **errp;
+ int ret;
+} QEDOpenCo;
+
+static void coroutine_fn bdrv_qed_open_entry(void *opaque)
+{
+ QEDOpenCo *qoc = opaque;
+ BDRVQEDState *s = qoc->bs->opaque;
+
+ qemu_co_mutex_lock(&s->table_lock);
+ qoc->ret = bdrv_qed_do_open(qoc->bs, qoc->options, qoc->flags, qoc->errp);
+ qemu_co_mutex_unlock(&s->table_lock);
+}
+
static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
+ QEDOpenCo qoc = {
+ .bs = bs,
+ .options = options,
+ .flags = flags,
+ .errp = errp,
+ .ret = -EINPROGRESS
+ };
+
bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
false, errp);
if (!bs->file) {
@@ -523,7 +550,14 @@ static int bdrv_qed_open(BlockDriverState *bs, QDict *options, int flags,
}
bdrv_qed_init_state(bs);
- return bdrv_qed_do_open(bs, options, flags, errp);
+ if (qemu_in_coroutine()) {
+ bdrv_qed_open_entry(&qoc);
+ } else {
+ qemu_coroutine_enter(qemu_coroutine_create(bdrv_qed_open_entry, &qoc));
+ BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
+ }
+ BDRV_POLL_WHILE(bs, qoc.ret == -EINPROGRESS);
+ return qoc.ret;
}
static void bdrv_qed_refresh_limits(BlockDriverState *bs, Error **errp)
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* [Qemu-devel] [PATCH 7/8] block: convert bdrv_invalidate_cache callback to coroutine_fn
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
` (5 preceding siblings ...)
2018-03-01 16:36 ` [Qemu-devel] [PATCH 6/8] qed: make bdrv_qed_do_open " Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-01 16:36 ` [Qemu-devel] [PATCH 8/8] block: convert bdrv_check " Paolo Bonzini
` (2 subsequent siblings)
9 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf
QED's bdrv_invalidate_cache implementation would like to reuse functions
that acquire/release the metadata locks. Call it from coroutine context
to simplify the logic.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1516279431-30424-6-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block.c | 41 +++++++++++++++++++++++++++++++++++++----
block/iscsi.c | 6 +++---
block/nfs.c | 6 +++---
block/qcow2.c | 7 +++++--
block/qed.c | 13 +++++--------
block/rbd.c | 6 +++---
include/block/block_int.h | 3 ++-
7 files changed, 58 insertions(+), 24 deletions(-)
diff --git a/block.c b/block.c
index e713fe3d00..b72ed976fd 100644
--- a/block.c
+++ b/block.c
@@ -4211,7 +4211,8 @@ void bdrv_init_with_whitelist(void)
bdrv_init();
}
-void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
+static void coroutine_fn bdrv_co_invalidate_cache(BlockDriverState *bs,
+ Error **errp)
{
BdrvChild *child, *parent;
uint64_t perm, shared_perm;
@@ -4227,7 +4228,7 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
}
QLIST_FOREACH(child, &bs->children, next) {
- bdrv_invalidate_cache(child->bs, &local_err);
+ bdrv_co_invalidate_cache(child->bs, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
@@ -4257,8 +4258,8 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
}
bdrv_set_perm(bs, perm, shared_perm);
- if (bs->drv->bdrv_invalidate_cache) {
- bs->drv->bdrv_invalidate_cache(bs, &local_err);
+ if (bs->drv->bdrv_co_invalidate_cache) {
+ bs->drv->bdrv_co_invalidate_cache(bs, &local_err);
if (local_err) {
bs->open_flags |= BDRV_O_INACTIVE;
error_propagate(errp, local_err);
@@ -4284,6 +4285,38 @@ void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
}
}
+typedef struct InvalidateCacheCo {
+ BlockDriverState *bs;
+ Error **errp;
+ bool done;
+} InvalidateCacheCo;
+
+static void coroutine_fn bdrv_invalidate_cache_co_entry(void *opaque)
+{
+ InvalidateCacheCo *ico = opaque;
+ bdrv_co_invalidate_cache(ico->bs, ico->errp);
+ ico->done = true;
+}
+
+void bdrv_invalidate_cache(BlockDriverState *bs, Error **errp)
+{
+ Coroutine *co;
+ InvalidateCacheCo ico = {
+ .bs = bs,
+ .done = false,
+ .errp = errp
+ };
+
+ if (qemu_in_coroutine()) {
+ /* Fast-path if already in coroutine context */
+ bdrv_invalidate_cache_co_entry(&ico);
+ } else {
+ co = qemu_coroutine_create(bdrv_invalidate_cache_co_entry, &ico);
+ qemu_coroutine_enter(co);
+ BDRV_POLL_WHILE(bs, !ico.done);
+ }
+}
+
void bdrv_invalidate_cache_all(Error **errp)
{
BlockDriverState *bs;
diff --git a/block/iscsi.c b/block/iscsi.c
index 662f441997..10e2eef03c 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -2168,8 +2168,8 @@ static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
return 0;
}
-static void iscsi_invalidate_cache(BlockDriverState *bs,
- Error **errp)
+static void coroutine_fn iscsi_co_invalidate_cache(BlockDriverState *bs,
+ Error **errp)
{
IscsiLun *iscsilun = bs->opaque;
iscsi_allocmap_invalidate(iscsilun);
@@ -2200,7 +2200,7 @@ static BlockDriver bdrv_iscsi = {
.create_opts = &iscsi_create_opts,
.bdrv_reopen_prepare = iscsi_reopen_prepare,
.bdrv_reopen_commit = iscsi_reopen_commit,
- .bdrv_invalidate_cache = iscsi_invalidate_cache,
+ .bdrv_co_invalidate_cache = iscsi_co_invalidate_cache,
.bdrv_getlength = iscsi_getlength,
.bdrv_get_info = iscsi_get_info,
diff --git a/block/nfs.c b/block/nfs.c
index ce6e195a41..68d822b6ff 100644
--- a/block/nfs.c
+++ b/block/nfs.c
@@ -876,8 +876,8 @@ static void nfs_refresh_filename(BlockDriverState *bs, QDict *options)
}
#ifdef LIBNFS_FEATURE_PAGECACHE
-static void nfs_invalidate_cache(BlockDriverState *bs,
- Error **errp)
+static void coroutine_fn nfs_co_invalidate_cache(BlockDriverState *bs,
+ Error **errp)
{
NFSClient *client = bs->opaque;
nfs_pagecache_invalidate(client->context, client->fh);
@@ -910,7 +910,7 @@ static BlockDriver bdrv_nfs = {
.bdrv_refresh_filename = nfs_refresh_filename,
#ifdef LIBNFS_FEATURE_PAGECACHE
- .bdrv_invalidate_cache = nfs_invalidate_cache,
+ .bdrv_co_invalidate_cache = nfs_co_invalidate_cache,
#endif
};
diff --git a/block/qcow2.c b/block/qcow2.c
index b5410c5b00..33e260a381 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -2119,7 +2119,8 @@ static void qcow2_close(BlockDriverState *bs)
qcow2_free_snapshots(bs);
}
-static void qcow2_invalidate_cache(BlockDriverState *bs, Error **errp)
+static void coroutine_fn qcow2_co_invalidate_cache(BlockDriverState *bs,
+ Error **errp)
{
BDRVQcow2State *s = bs->opaque;
int flags = s->flags;
@@ -2142,7 +2143,9 @@ static void qcow2_invalidate_cache(BlockDriverState *bs, Error **errp)
options = qdict_clone_shallow(bs->options);
flags &= ~BDRV_O_INACTIVE;
+ qemu_co_mutex_lock(&s->lock);
ret = qcow2_do_open(bs, options, flags, &local_err);
+ qemu_co_mutex_unlock(&s->lock);
QDECREF(options);
if (local_err) {
error_propagate(errp, local_err);
@@ -4383,7 +4386,7 @@ BlockDriver bdrv_qcow2 = {
.bdrv_change_backing_file = qcow2_change_backing_file,
.bdrv_refresh_limits = qcow2_refresh_limits,
- .bdrv_invalidate_cache = qcow2_invalidate_cache,
+ .bdrv_co_invalidate_cache = qcow2_co_invalidate_cache,
.bdrv_inactivate = qcow2_inactivate,
.create_opts = &qcow2_create_opts,
diff --git a/block/qed.c b/block/qed.c
index d379c8c2f0..7da553035e 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1549,7 +1549,8 @@ static int bdrv_qed_change_backing_file(BlockDriverState *bs,
return ret;
}
-static void bdrv_qed_invalidate_cache(BlockDriverState *bs, Error **errp)
+static void coroutine_fn bdrv_qed_co_invalidate_cache(BlockDriverState *bs,
+ Error **errp)
{
BDRVQEDState *s = bs->opaque;
Error *local_err = NULL;
@@ -1558,13 +1559,9 @@ static void bdrv_qed_invalidate_cache(BlockDriverState *bs, Error **errp)
bdrv_qed_close(bs);
bdrv_qed_init_state(bs);
- if (qemu_in_coroutine()) {
- qemu_co_mutex_lock(&s->table_lock);
- }
+ qemu_co_mutex_lock(&s->table_lock);
ret = bdrv_qed_do_open(bs, NULL, bs->open_flags, &local_err);
- if (qemu_in_coroutine()) {
- qemu_co_mutex_unlock(&s->table_lock);
- }
+ qemu_co_mutex_unlock(&s->table_lock);
if (local_err) {
error_propagate(errp, local_err);
error_prepend(errp, "Could not reopen qed layer: ");
@@ -1639,7 +1636,7 @@ static BlockDriver bdrv_qed = {
.bdrv_get_info = bdrv_qed_get_info,
.bdrv_refresh_limits = bdrv_qed_refresh_limits,
.bdrv_change_backing_file = bdrv_qed_change_backing_file,
- .bdrv_invalidate_cache = bdrv_qed_invalidate_cache,
+ .bdrv_co_invalidate_cache = bdrv_qed_co_invalidate_cache,
.bdrv_check = bdrv_qed_check,
.bdrv_detach_aio_context = bdrv_qed_detach_aio_context,
.bdrv_attach_aio_context = bdrv_qed_attach_aio_context,
diff --git a/block/rbd.c b/block/rbd.c
index c7dd32e213..c1275c1ec9 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -1093,8 +1093,8 @@ static BlockAIOCB *qemu_rbd_aio_pdiscard(BlockDriverState *bs,
#endif
#ifdef LIBRBD_SUPPORTS_INVALIDATE
-static void qemu_rbd_invalidate_cache(BlockDriverState *bs,
- Error **errp)
+static void coroutine_fn qemu_rbd_co_invalidate_cache(BlockDriverState *bs,
+ Error **errp)
{
BDRVRBDState *s = bs->opaque;
int r = rbd_invalidate_cache(s->image);
@@ -1160,7 +1160,7 @@ static BlockDriver bdrv_rbd = {
.bdrv_snapshot_list = qemu_rbd_snap_list,
.bdrv_snapshot_goto = qemu_rbd_snap_rollback,
#ifdef LIBRBD_SUPPORTS_INVALIDATE
- .bdrv_invalidate_cache = qemu_rbd_invalidate_cache,
+ .bdrv_co_invalidate_cache = qemu_rbd_co_invalidate_cache,
#endif
};
diff --git a/include/block/block_int.h b/include/block/block_int.h
index f80683ded2..10064d2a2f 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -216,7 +216,8 @@ struct BlockDriver {
/*
* Invalidate any cached meta-data.
*/
- void (*bdrv_invalidate_cache)(BlockDriverState *bs, Error **errp);
+ void coroutine_fn (*bdrv_co_invalidate_cache)(BlockDriverState *bs,
+ Error **errp);
int (*bdrv_inactivate)(BlockDriverState *bs);
/*
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* [Qemu-devel] [PATCH 8/8] block: convert bdrv_check callback to coroutine_fn
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
` (6 preceding siblings ...)
2018-03-01 16:36 ` [Qemu-devel] [PATCH 7/8] block: convert bdrv_invalidate_cache callback to coroutine_fn Paolo Bonzini
@ 2018-03-01 16:36 ` Paolo Bonzini
2018-03-06 13:59 ` [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Kevin Wolf
2018-03-06 16:37 ` Kevin Wolf
9 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-01 16:36 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-block, kwolf
Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1516279431-30424-8-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
block.c | 43 ++++++++++++++++++++++++++++++++++++++++---
block/parallels.c | 17 +++++++++++------
block/qcow2.c | 23 +++++++++++++++++++----
block/qed-check.c | 1 +
block/qed-table.c | 26 +++++++++-----------------
block/qed.c | 13 +++++++++----
block/vdi.c | 6 +++---
block/vhdx.c | 7 ++++---
block/vmdk.c | 7 ++++---
include/block/block_int.h | 5 +++--
10 files changed, 103 insertions(+), 45 deletions(-)
diff --git a/block.c b/block.c
index b72ed976fd..944423f7f7 100644
--- a/block.c
+++ b/block.c
@@ -3457,17 +3457,54 @@ static void bdrv_delete(BlockDriverState *bs)
* free of errors) or -errno when an internal error occurred. The results of the
* check are stored in res.
*/
-int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res, BdrvCheckMode fix)
+static int coroutine_fn bdrv_co_check(BlockDriverState *bs,
+ BdrvCheckResult *res, BdrvCheckMode fix)
{
if (bs->drv == NULL) {
return -ENOMEDIUM;
}
- if (bs->drv->bdrv_check == NULL) {
+ if (bs->drv->bdrv_co_check == NULL) {
return -ENOTSUP;
}
memset(res, 0, sizeof(*res));
- return bs->drv->bdrv_check(bs, res, fix);
+ return bs->drv->bdrv_co_check(bs, res, fix);
+}
+
+typedef struct CheckCo {
+ BlockDriverState *bs;
+ BdrvCheckResult *res;
+ BdrvCheckMode fix;
+ int ret;
+} CheckCo;
+
+static void bdrv_check_co_entry(void *opaque)
+{
+ CheckCo *cco = opaque;
+ cco->ret = bdrv_co_check(cco->bs, cco->res, cco->fix);
+}
+
+int bdrv_check(BlockDriverState *bs,
+ BdrvCheckResult *res, BdrvCheckMode fix)
+{
+ Coroutine *co;
+ CheckCo cco = {
+ .bs = bs,
+ .res = res,
+ .ret = -EINPROGRESS,
+ .fix = fix,
+ };
+
+ if (qemu_in_coroutine()) {
+ /* Fast-path if already in coroutine context */
+ bdrv_check_co_entry(&cco);
+ } else {
+ co = qemu_coroutine_create(bdrv_check_co_entry, &cco);
+ qemu_coroutine_enter(co);
+ BDRV_POLL_WHILE(bs, cco.ret == -EINPROGRESS);
+ }
+
+ return cco.ret;
}
/*
diff --git a/block/parallels.c b/block/parallels.c
index c3095bd9c0..390216c25d 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -370,8 +370,9 @@ static coroutine_fn int parallels_co_readv(BlockDriverState *bs,
}
-static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
- BdrvCheckMode fix)
+static int coroutine_fn parallels_co_check(BlockDriverState *bs,
+ BdrvCheckResult *res,
+ BdrvCheckMode fix)
{
BDRVParallelsState *s = bs->opaque;
int64_t size, prev_off, high_off;
@@ -386,6 +387,7 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
return size;
}
+ qemu_co_mutex_lock(&s->lock);
if (s->header_unclean) {
fprintf(stderr, "%s image was not closed correctly\n",
fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR");
@@ -434,11 +436,12 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
prev_off = off;
}
+ ret = 0;
if (flush_bat) {
ret = bdrv_pwrite_sync(bs->file, 0, s->header, s->header_size);
if (ret < 0) {
res->check_errors++;
- return ret;
+ goto out;
}
}
@@ -457,13 +460,15 @@ static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
if (ret < 0) {
error_report_err(local_err);
res->check_errors++;
- return ret;
+ goto out;
}
res->leaks_fixed += count;
}
}
- return 0;
+out:
+ qemu_co_mutex_unlock(&s->lock);
+ return ret;
}
@@ -792,7 +797,7 @@ static BlockDriver bdrv_parallels = {
.supports_backing = true,
.bdrv_co_create_opts = parallels_co_create_opts,
- .bdrv_check = parallels_check,
+ .bdrv_co_check = parallels_co_check,
.create_opts = ¶llels_create_opts,
};
diff --git a/block/qcow2.c b/block/qcow2.c
index 33e260a381..39a3415c99 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -543,8 +543,9 @@ int qcow2_mark_consistent(BlockDriverState *bs)
return 0;
}
-static int qcow2_check(BlockDriverState *bs, BdrvCheckResult *result,
- BdrvCheckMode fix)
+static int coroutine_fn qcow2_co_check_locked(BlockDriverState *bs,
+ BdrvCheckResult *result,
+ BdrvCheckMode fix)
{
int ret = qcow2_check_refcounts(bs, result, fix);
if (ret < 0) {
@@ -561,6 +562,19 @@ static int qcow2_check(BlockDriverState *bs, BdrvCheckResult *result,
return ret;
}
+static int coroutine_fn qcow2_co_check(BlockDriverState *bs,
+ BdrvCheckResult *result,
+ BdrvCheckMode fix)
+{
+ BDRVQcow2State *s = bs->opaque;
+ int ret;
+
+ qemu_co_mutex_lock(&s->lock);
+ ret = qcow2_co_check_locked(bs, result, fix);
+ qemu_co_mutex_unlock(&s->lock);
+ return ret;
+}
+
static int validate_table_offset(BlockDriverState *bs, uint64_t offset,
uint64_t entries, size_t entry_len)
{
@@ -1485,7 +1499,8 @@ static int coroutine_fn qcow2_do_open(BlockDriverState *bs, QDict *options,
(s->incompatible_features & QCOW2_INCOMPAT_DIRTY)) {
BdrvCheckResult result = {0};
- ret = qcow2_check(bs, &result, BDRV_FIX_ERRORS | BDRV_FIX_LEAKS);
+ ret = qcow2_co_check_locked(bs, &result,
+ BDRV_FIX_ERRORS | BDRV_FIX_LEAKS);
if (ret < 0 || result.check_errors) {
if (ret >= 0) {
ret = -EIO;
@@ -4390,7 +4405,7 @@ BlockDriver bdrv_qcow2 = {
.bdrv_inactivate = qcow2_inactivate,
.create_opts = &qcow2_create_opts,
- .bdrv_check = qcow2_check,
+ .bdrv_co_check = qcow2_co_check,
.bdrv_amend_options = qcow2_amend_options,
.bdrv_detach_aio_context = qcow2_detach_aio_context,
diff --git a/block/qed-check.c b/block/qed-check.c
index dcd4f036b8..0edac03159 100644
--- a/block/qed-check.c
+++ b/block/qed-check.c
@@ -217,6 +217,7 @@ static void qed_check_mark_clean(BDRVQEDState *s, BdrvCheckResult *result)
qed_write_header_sync(s);
}
+/* Called with table_lock held. */
int qed_check(BDRVQEDState *s, BdrvCheckResult *result, bool fix)
{
QEDCheck check = {
diff --git a/block/qed-table.c b/block/qed-table.c
index eead8b0fc7..7df5680adb 100644
--- a/block/qed-table.c
+++ b/block/qed-table.c
@@ -18,7 +18,7 @@
#include "qed.h"
#include "qemu/bswap.h"
-/* Called either from qed_check or with table_lock held. */
+/* Called with table_lock held. */
static int qed_read_table(BDRVQEDState *s, uint64_t offset, QEDTable *table)
{
QEMUIOVector qiov;
@@ -33,13 +33,9 @@ static int qed_read_table(BDRVQEDState *s, uint64_t offset, QEDTable *table)
trace_qed_read_table(s, offset, table);
- if (qemu_in_coroutine()) {
- qemu_co_mutex_unlock(&s->table_lock);
- }
+ qemu_co_mutex_unlock(&s->table_lock);
ret = bdrv_preadv(s->bs->file, offset, &qiov);
- if (qemu_in_coroutine()) {
- qemu_co_mutex_lock(&s->table_lock);
- }
+ qemu_co_mutex_lock(&s->table_lock);
if (ret < 0) {
goto out;
}
@@ -67,7 +63,7 @@ out:
* @n: Number of elements
* @flush: Whether or not to sync to disk
*
- * Called either from qed_check or with table_lock held.
+ * Called with table_lock held.
*/
static int qed_write_table(BDRVQEDState *s, uint64_t offset, QEDTable *table,
unsigned int index, unsigned int n, bool flush)
@@ -104,13 +100,9 @@ static int qed_write_table(BDRVQEDState *s, uint64_t offset, QEDTable *table,
/* Adjust for offset into table */
offset += start * sizeof(uint64_t);
- if (qemu_in_coroutine()) {
- qemu_co_mutex_unlock(&s->table_lock);
- }
+ qemu_co_mutex_unlock(&s->table_lock);
ret = bdrv_pwritev(s->bs->file, offset, &qiov);
- if (qemu_in_coroutine()) {
- qemu_co_mutex_lock(&s->table_lock);
- }
+ qemu_co_mutex_lock(&s->table_lock);
trace_qed_write_table_cb(s, table, flush, ret);
if (ret < 0) {
goto out;
@@ -134,7 +126,7 @@ int qed_read_l1_table_sync(BDRVQEDState *s)
return qed_read_table(s, s->header.l1_table_offset, s->l1_table);
}
-/* Called either from qed_check or with table_lock held. */
+/* Called with table_lock held. */
int qed_write_l1_table(BDRVQEDState *s, unsigned int index, unsigned int n)
{
BLKDBG_EVENT(s->bs->file, BLKDBG_L1_UPDATE);
@@ -148,7 +140,7 @@ int qed_write_l1_table_sync(BDRVQEDState *s, unsigned int index,
return qed_write_l1_table(s, index, n);
}
-/* Called either from qed_check or with table_lock held. */
+/* Called with table_lock held. */
int qed_read_l2_table(BDRVQEDState *s, QEDRequest *request, uint64_t offset)
{
int ret;
@@ -191,7 +183,7 @@ int qed_read_l2_table_sync(BDRVQEDState *s, QEDRequest *request, uint64_t offset
return qed_read_l2_table(s, request, offset);
}
-/* Called either from qed_check or with table_lock held. */
+/* Called with table_lock held. */
int qed_write_l2_table(BDRVQEDState *s, QEDRequest *request,
unsigned int index, unsigned int n, bool flush)
{
diff --git a/block/qed.c b/block/qed.c
index 7da553035e..c655f139a2 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -1572,12 +1572,17 @@ static void coroutine_fn bdrv_qed_co_invalidate_cache(BlockDriverState *bs,
}
}
-static int bdrv_qed_check(BlockDriverState *bs, BdrvCheckResult *result,
- BdrvCheckMode fix)
+static int bdrv_qed_co_check(BlockDriverState *bs, BdrvCheckResult *result,
+ BdrvCheckMode fix)
{
BDRVQEDState *s = bs->opaque;
+ int ret;
- return qed_check(s, result, !!fix);
+ qemu_co_mutex_lock(&s->table_lock);
+ ret = qed_check(s, result, !!fix);
+ qemu_co_mutex_unlock(&s->table_lock);
+
+ return ret;
}
static QemuOptsList qed_create_opts = {
@@ -1637,7 +1642,7 @@ static BlockDriver bdrv_qed = {
.bdrv_refresh_limits = bdrv_qed_refresh_limits,
.bdrv_change_backing_file = bdrv_qed_change_backing_file,
.bdrv_co_invalidate_cache = bdrv_qed_co_invalidate_cache,
- .bdrv_check = bdrv_qed_check,
+ .bdrv_co_check = bdrv_qed_co_check,
.bdrv_detach_aio_context = bdrv_qed_detach_aio_context,
.bdrv_attach_aio_context = bdrv_qed_attach_aio_context,
.bdrv_co_drain_begin = bdrv_qed_co_drain_begin,
diff --git a/block/vdi.c b/block/vdi.c
index 0fa98d5ffe..a7fa62fa3c 100644
--- a/block/vdi.c
+++ b/block/vdi.c
@@ -259,8 +259,8 @@ static void vdi_header_print(VdiHeader *header)
}
#endif
-static int vdi_check(BlockDriverState *bs, BdrvCheckResult *res,
- BdrvCheckMode fix)
+static int coroutine_fn vdi_co_check(BlockDriverState *bs, BdrvCheckResult *res,
+ BdrvCheckMode fix)
{
/* TODO: additional checks possible. */
BDRVVdiState *s = (BDRVVdiState *)bs->opaque;
@@ -909,7 +909,7 @@ static BlockDriver bdrv_vdi = {
.bdrv_get_info = vdi_get_info,
.create_opts = &vdi_create_opts,
- .bdrv_check = vdi_check,
+ .bdrv_co_check = vdi_co_check,
};
static void bdrv_vdi_init(void)
diff --git a/block/vhdx.c b/block/vhdx.c
index 3fbff5048b..d82350d07c 100644
--- a/block/vhdx.c
+++ b/block/vhdx.c
@@ -1944,8 +1944,9 @@ exit:
* r/w and any log has already been replayed, so there is nothing (currently)
* for us to do here
*/
-static int vhdx_check(BlockDriverState *bs, BdrvCheckResult *result,
- BdrvCheckMode fix)
+static int coroutine_fn vhdx_co_check(BlockDriverState *bs,
+ BdrvCheckResult *result,
+ BdrvCheckMode fix)
{
BDRVVHDXState *s = bs->opaque;
@@ -2006,7 +2007,7 @@ static BlockDriver bdrv_vhdx = {
.bdrv_co_writev = vhdx_co_writev,
.bdrv_co_create_opts = vhdx_co_create_opts,
.bdrv_get_info = vhdx_get_info,
- .bdrv_check = vhdx_check,
+ .bdrv_co_check = vhdx_co_check,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.create_opts = &vhdx_create_opts,
diff --git a/block/vmdk.c b/block/vmdk.c
index a3f7610082..264d855ec1 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -2231,8 +2231,9 @@ static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent)
return info;
}
-static int vmdk_check(BlockDriverState *bs, BdrvCheckResult *result,
- BdrvCheckMode fix)
+static int coroutine_fn vmdk_co_check(BlockDriverState *bs,
+ BdrvCheckResult *result,
+ BdrvCheckMode fix)
{
BDRVVmdkState *s = bs->opaque;
VmdkExtent *extent = NULL;
@@ -2401,7 +2402,7 @@ static BlockDriver bdrv_vmdk = {
.instance_size = sizeof(BDRVVmdkState),
.bdrv_probe = vmdk_probe,
.bdrv_open = vmdk_open,
- .bdrv_check = vmdk_check,
+ .bdrv_co_check = vmdk_co_check,
.bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_child_perm = bdrv_format_default_perms,
.bdrv_co_preadv = vmdk_co_preadv,
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 10064d2a2f..c8d208620e 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -299,8 +299,9 @@ struct BlockDriver {
* Returns 0 for completed check, -errno for internal errors.
* The check results are stored in result.
*/
- int (*bdrv_check)(BlockDriverState *bs, BdrvCheckResult *result,
- BdrvCheckMode fix);
+ int coroutine_fn (*bdrv_co_check)(BlockDriverState *bs,
+ BdrvCheckResult *result,
+ BdrvCheckMode fix);
int (*bdrv_amend_options)(BlockDriverState *bs, QemuOpts *opts,
BlockDriverAmendStatusCB *status_cb,
--
2.14.3
^ permalink raw reply related [flat|nested] 15+ messages in thread* Re: [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
` (7 preceding siblings ...)
2018-03-01 16:36 ` [Qemu-devel] [PATCH 8/8] block: convert bdrv_check " Paolo Bonzini
@ 2018-03-06 13:59 ` Kevin Wolf
2018-03-06 14:28 ` Paolo Bonzini
2018-03-06 16:37 ` Kevin Wolf
9 siblings, 1 reply; 15+ messages in thread
From: Kevin Wolf @ 2018-03-06 13:59 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: qemu-devel, qemu-block
Am 01.03.2018 um 17:36 hat Paolo Bonzini geschrieben:
> Check and invalidate_cache share some parts of the implementation
> with the regular I/O path. This is sometimes complicated because the
> I/O path wants to use a CoMutex but that is not possible outside coroutine
> context. By moving things to coroutine context, we can remove special
> cases. In fact, invalidate_cache is already called from coroutine context
> because incoming migration is placed in a coroutine.
>
> I'm including two patches from Stefan to rename the bdrv_create callback
> to bdrv_co_create, because it is already called from coroutine context.
> The name is now bdrv_co_create_opts, with bdrv_co_create reserved for
> the QAPI-based version that Kevin is working on.
>
> qcow2 still has cache flushing in non-coroutine context, coming from
> qcow2_reopen_prepare->qcow2_update_options_prepare,
> qcow2_close->qcow2_inactivate and several dirty bitmap functions.
Hmm... Which commit is this based on? I can't seem to find one where it
applies cleanly.
Kevin
^ permalink raw reply [flat|nested] 15+ messages in thread* Re: [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context
2018-03-06 13:59 ` [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Kevin Wolf
@ 2018-03-06 14:28 ` Paolo Bonzini
0 siblings, 0 replies; 15+ messages in thread
From: Paolo Bonzini @ 2018-03-06 14:28 UTC (permalink / raw)
To: Kevin Wolf; +Cc: qemu-devel, qemu-block
On 06/03/2018 14:59, Kevin Wolf wrote:
> Am 01.03.2018 um 17:36 hat Paolo Bonzini geschrieben:
>> Check and invalidate_cache share some parts of the implementation
>> with the regular I/O path. This is sometimes complicated because the
>> I/O path wants to use a CoMutex but that is not possible outside coroutine
>> context. By moving things to coroutine context, we can remove special
>> cases. In fact, invalidate_cache is already called from coroutine context
>> because incoming migration is placed in a coroutine.
>>
>> I'm including two patches from Stefan to rename the bdrv_create callback
>> to bdrv_co_create, because it is already called from coroutine context.
>> The name is now bdrv_co_create_opts, with bdrv_co_create reserved for
>> the QAPI-based version that Kevin is working on.
>>
>> qcow2 still has cache flushing in non-coroutine context, coming from
>> qcow2_reopen_prepare->qcow2_update_options_prepare,
>> qcow2_close->qcow2_inactivate and several dirty bitmap functions.
>
> Hmm... Which commit is this based on? I can't seem to find one where it
> applies cleanly.
It's on top of bec9c64ef7be8063f1192608b83877bc5c9ea217, I'll respin.
Paolo
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context
2018-03-01 16:36 [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Paolo Bonzini
` (8 preceding siblings ...)
2018-03-06 13:59 ` [Qemu-devel] [PATCH v4 0/8] Call check and invalidate_cache from coroutine context Kevin Wolf
@ 2018-03-06 16:37 ` Kevin Wolf
9 siblings, 0 replies; 15+ messages in thread
From: Kevin Wolf @ 2018-03-06 16:37 UTC (permalink / raw)
To: Paolo Bonzini; +Cc: qemu-devel, qemu-block
Am 01.03.2018 um 17:36 hat Paolo Bonzini geschrieben:
> Check and invalidate_cache share some parts of the implementation
> with the regular I/O path. This is sometimes complicated because the
> I/O path wants to use a CoMutex but that is not possible outside coroutine
> context. By moving things to coroutine context, we can remove special
> cases. In fact, invalidate_cache is already called from coroutine context
> because incoming migration is placed in a coroutine.
>
> I'm including two patches from Stefan to rename the bdrv_create callback
> to bdrv_co_create, because it is already called from coroutine context.
> The name is now bdrv_co_create_opts, with bdrv_co_create reserved for
> the QAPI-based version that Kevin is working on.
>
> qcow2 still has cache flushing in non-coroutine context, coming from
> qcow2_reopen_prepare->qcow2_update_options_prepare,
> qcow2_close->qcow2_inactivate and several dirty bitmap functions.
Thanks, applied to the block branch.
Kevin
^ permalink raw reply [flat|nested] 15+ messages in thread