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authorKevin Wolf <kwolf@redhat.com>2017-06-12 11:12:41 +0200
committerKevin Wolf <kwolf@redhat.com>2017-06-26 14:51:15 +0200
commit87f0d88261d120e428cd23305775026556e6cce6 (patch)
treed1e5ba69edaacf5f22b593a4bc0fe3234c91485e /block/qed.c
parentc0e8f98927929b65ffbfb320b7a1c79e0e620006 (diff)
qed: Add coroutine_fn to I/O path functions
Now that we stay in coroutine context for the whole request when doing reads or writes, we can add coroutine_fn annotations to many functions that can do I/O or yield directly. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block/qed.c')
-rw-r--r--block/qed.c44
1 files changed, 24 insertions, 20 deletions
diff --git a/block/qed.c b/block/qed.c
index eac8c2f19a..48f2b0eb52 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -94,7 +94,7 @@ int qed_write_header_sync(BDRVQEDState *s)
* This function only updates known header fields in-place and does not affect
* extra data after the QED header.
*/
-static int qed_write_header(BDRVQEDState *s)
+static int coroutine_fn qed_write_header(BDRVQEDState *s)
{
/* We must write full sectors for O_DIRECT but cannot necessarily generate
* the data following the header if an unrecognized compat feature is
@@ -264,7 +264,7 @@ static void qed_unplug_allocating_write_reqs(BDRVQEDState *s)
qemu_co_enter_next(&s->allocating_write_reqs);
}
-static void qed_need_check_timer_entry(void *opaque)
+static void coroutine_fn qed_need_check_timer_entry(void *opaque)
{
BDRVQEDState *s = opaque;
int ret;
@@ -757,9 +757,9 @@ static BDRVQEDState *acb_to_s(QEDAIOCB *acb)
* This function reads qiov->size bytes starting at pos from the backing file.
* If there is no backing file then zeroes are read.
*/
-static int qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
- QEMUIOVector *qiov,
- QEMUIOVector **backing_qiov)
+static int coroutine_fn qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
+ QEMUIOVector *qiov,
+ QEMUIOVector **backing_qiov)
{
uint64_t backing_length = 0;
size_t size;
@@ -811,8 +811,9 @@ static int qed_read_backing_file(BDRVQEDState *s, uint64_t pos,
* @len: Number of bytes
* @offset: Byte offset in image file
*/
-static int qed_copy_from_backing_file(BDRVQEDState *s, uint64_t pos,
- uint64_t len, uint64_t offset)
+static int coroutine_fn qed_copy_from_backing_file(BDRVQEDState *s,
+ uint64_t pos, uint64_t len,
+ uint64_t offset)
{
QEMUIOVector qiov;
QEMUIOVector *backing_qiov = NULL;
@@ -865,8 +866,9 @@ out:
* The cluster offset may be an allocated byte offset in the image file, the
* zero cluster marker, or the unallocated cluster marker.
*/
-static void qed_update_l2_table(BDRVQEDState *s, QEDTable *table, int index,
- unsigned int n, uint64_t cluster)
+static void coroutine_fn qed_update_l2_table(BDRVQEDState *s, QEDTable *table,
+ int index, unsigned int n,
+ uint64_t cluster)
{
int i;
for (i = index; i < index + n; i++) {
@@ -878,7 +880,7 @@ static void qed_update_l2_table(BDRVQEDState *s, QEDTable *table, int index,
}
}
-static void qed_aio_complete(QEDAIOCB *acb)
+static void coroutine_fn qed_aio_complete(QEDAIOCB *acb)
{
BDRVQEDState *s = acb_to_s(acb);
@@ -911,7 +913,7 @@ static void qed_aio_complete(QEDAIOCB *acb)
/**
* Update L1 table with new L2 table offset and write it out
*/
-static int qed_aio_write_l1_update(QEDAIOCB *acb)
+static int coroutine_fn qed_aio_write_l1_update(QEDAIOCB *acb)
{
BDRVQEDState *s = acb_to_s(acb);
CachedL2Table *l2_table = acb->request.l2_table;
@@ -939,7 +941,7 @@ static int qed_aio_write_l1_update(QEDAIOCB *acb)
/**
* Update L2 table with new cluster offsets and write them out
*/
-static int qed_aio_write_l2_update(QEDAIOCB *acb, uint64_t offset)
+static int coroutine_fn qed_aio_write_l2_update(QEDAIOCB *acb, uint64_t offset)
{
BDRVQEDState *s = acb_to_s(acb);
bool need_alloc = acb->find_cluster_ret == QED_CLUSTER_L1;
@@ -975,7 +977,7 @@ static int qed_aio_write_l2_update(QEDAIOCB *acb, uint64_t offset)
/**
* Write data to the image file
*/
-static int qed_aio_write_main(QEDAIOCB *acb)
+static int coroutine_fn qed_aio_write_main(QEDAIOCB *acb)
{
BDRVQEDState *s = acb_to_s(acb);
uint64_t offset = acb->cur_cluster +
@@ -1018,7 +1020,7 @@ static int qed_aio_write_main(QEDAIOCB *acb)
/**
* Populate untouched regions of new data cluster
*/
-static int qed_aio_write_cow(QEDAIOCB *acb)
+static int coroutine_fn qed_aio_write_cow(QEDAIOCB *acb)
{
BDRVQEDState *s = acb_to_s(acb);
uint64_t start, len, offset;
@@ -1071,7 +1073,7 @@ static bool qed_should_set_need_check(BDRVQEDState *s)
*
* This path is taken when writing to previously unallocated clusters.
*/
-static int qed_aio_write_alloc(QEDAIOCB *acb, size_t len)
+static int coroutine_fn qed_aio_write_alloc(QEDAIOCB *acb, size_t len)
{
BDRVQEDState *s = acb_to_s(acb);
int ret;
@@ -1132,7 +1134,8 @@ static int qed_aio_write_alloc(QEDAIOCB *acb, size_t len)
*
* This path is taken when writing to already allocated clusters.
*/
-static int qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset, size_t len)
+static int coroutine_fn qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset,
+ size_t len)
{
/* Allocate buffer for zero writes */
if (acb->flags & QED_AIOCB_ZERO) {
@@ -1163,8 +1166,8 @@ static int qed_aio_write_inplace(QEDAIOCB *acb, uint64_t offset, size_t len)
* @offset: Cluster offset in bytes
* @len: Length in bytes
*/
-static int qed_aio_write_data(void *opaque, int ret,
- uint64_t offset, size_t len)
+static int coroutine_fn qed_aio_write_data(void *opaque, int ret,
+ uint64_t offset, size_t len)
{
QEDAIOCB *acb = opaque;
@@ -1194,7 +1197,8 @@ static int qed_aio_write_data(void *opaque, int ret,
* @offset: Cluster offset in bytes
* @len: Length in bytes
*/
-static int qed_aio_read_data(void *opaque, int ret, uint64_t offset, size_t len)
+static int coroutine_fn qed_aio_read_data(void *opaque, int ret,
+ uint64_t offset, size_t len)
{
QEDAIOCB *acb = opaque;
BDRVQEDState *s = acb_to_s(acb);
@@ -1227,7 +1231,7 @@ static int qed_aio_read_data(void *opaque, int ret, uint64_t offset, size_t len)
/**
* Begin next I/O or complete the request
*/
-static int qed_aio_next_io(QEDAIOCB *acb)
+static int coroutine_fn qed_aio_next_io(QEDAIOCB *acb)
{
BDRVQEDState *s = acb_to_s(acb);
uint64_t offset;