aboutsummaryrefslogtreecommitdiff
path: root/block/sheepdog.c
diff options
context:
space:
mode:
Diffstat (limited to 'block/sheepdog.c')
-rw-r--r--block/sheepdog.c63
1 files changed, 35 insertions, 28 deletions
diff --git a/block/sheepdog.c b/block/sheepdog.c
index 255372e..08a09e9 100644
--- a/block/sheepdog.c
+++ b/block/sheepdog.c
@@ -318,7 +318,7 @@ enum AIOCBState {
AIOCB_DISCARD_OBJ,
};
-#define AIOCBOverwrapping(x, y) \
+#define AIOCBOverlapping(x, y) \
(!(x->max_affect_data_idx < y->min_affect_data_idx \
|| y->max_affect_data_idx < x->min_affect_data_idx))
@@ -342,6 +342,15 @@ struct SheepdogAIOCB {
uint32_t min_affect_data_idx;
uint32_t max_affect_data_idx;
+ /*
+ * The difference between affect_data_idx and dirty_data_idx:
+ * affect_data_idx represents range of index of all request types.
+ * dirty_data_idx represents range of index updated by COW requests.
+ * dirty_data_idx is used for updating an inode object.
+ */
+ uint32_t min_dirty_data_idx;
+ uint32_t max_dirty_data_idx;
+
QLIST_ENTRY(SheepdogAIOCB) aiocb_siblings;
};
@@ -351,9 +360,6 @@ typedef struct BDRVSheepdogState {
SheepdogInode inode;
- uint32_t min_dirty_data_idx;
- uint32_t max_dirty_data_idx;
-
char name[SD_MAX_VDI_LEN];
bool is_snapshot;
uint32_t cache_flags;
@@ -373,7 +379,7 @@ typedef struct BDRVSheepdogState {
QLIST_HEAD(inflight_aio_head, AIOReq) inflight_aio_head;
QLIST_HEAD(failed_aio_head, AIOReq) failed_aio_head;
- CoQueue overwrapping_queue;
+ CoQueue overlapping_queue;
QLIST_HEAD(inflight_aiocb_head, SheepdogAIOCB) inflight_aiocb_head;
} BDRVSheepdogState;
@@ -561,6 +567,9 @@ static SheepdogAIOCB *sd_aio_setup(BlockDriverState *bs, QEMUIOVector *qiov,
acb->max_affect_data_idx = (acb->sector_num * BDRV_SECTOR_SIZE +
acb->nb_sectors * BDRV_SECTOR_SIZE) / object_size;
+ acb->min_dirty_data_idx = UINT32_MAX;
+ acb->max_dirty_data_idx = 0;
+
return acb;
}
@@ -824,8 +833,8 @@ static void coroutine_fn aio_read_response(void *opaque)
*/
if (rsp.result == SD_RES_SUCCESS) {
s->inode.data_vdi_id[idx] = s->inode.vdi_id;
- s->max_dirty_data_idx = MAX(idx, s->max_dirty_data_idx);
- s->min_dirty_data_idx = MIN(idx, s->min_dirty_data_idx);
+ acb->max_dirty_data_idx = MAX(idx, acb->max_dirty_data_idx);
+ acb->min_dirty_data_idx = MIN(idx, acb->min_dirty_data_idx);
}
}
break;
@@ -1471,13 +1480,11 @@ static int sd_open(BlockDriverState *bs, QDict *options, int flags,
}
memcpy(&s->inode, buf, sizeof(s->inode));
- s->min_dirty_data_idx = UINT32_MAX;
- s->max_dirty_data_idx = 0;
bs->total_sectors = s->inode.vdi_size / BDRV_SECTOR_SIZE;
pstrcpy(s->name, sizeof(s->name), vdi);
qemu_co_mutex_init(&s->lock);
- qemu_co_queue_init(&s->overwrapping_queue);
+ qemu_co_queue_init(&s->overlapping_queue);
qemu_opts_del(opts);
g_free(buf);
return 0;
@@ -1989,16 +1996,16 @@ static void coroutine_fn sd_write_done(SheepdogAIOCB *acb)
AIOReq *aio_req;
uint32_t offset, data_len, mn, mx;
- mn = s->min_dirty_data_idx;
- mx = s->max_dirty_data_idx;
+ mn = acb->min_dirty_data_idx;
+ mx = acb->max_dirty_data_idx;
if (mn <= mx) {
/* we need to update the vdi object. */
offset = sizeof(s->inode) - sizeof(s->inode.data_vdi_id) +
mn * sizeof(s->inode.data_vdi_id[0]);
data_len = (mx - mn + 1) * sizeof(s->inode.data_vdi_id[0]);
- s->min_dirty_data_idx = UINT32_MAX;
- s->max_dirty_data_idx = 0;
+ acb->min_dirty_data_idx = UINT32_MAX;
+ acb->max_dirty_data_idx = 0;
iov.iov_base = &s->inode;
iov.iov_len = sizeof(s->inode);
@@ -2224,12 +2231,12 @@ out:
return 1;
}
-static bool check_overwrapping_aiocb(BDRVSheepdogState *s, SheepdogAIOCB *aiocb)
+static bool check_overlapping_aiocb(BDRVSheepdogState *s, SheepdogAIOCB *aiocb)
{
SheepdogAIOCB *cb;
QLIST_FOREACH(cb, &s->inflight_aiocb_head, aiocb_siblings) {
- if (AIOCBOverwrapping(aiocb, cb)) {
+ if (AIOCBOverlapping(aiocb, cb)) {
return true;
}
}
@@ -2258,15 +2265,15 @@ static coroutine_fn int sd_co_writev(BlockDriverState *bs, int64_t sector_num,
acb->aiocb_type = AIOCB_WRITE_UDATA;
retry:
- if (check_overwrapping_aiocb(s, acb)) {
- qemu_co_queue_wait(&s->overwrapping_queue);
+ if (check_overlapping_aiocb(s, acb)) {
+ qemu_co_queue_wait(&s->overlapping_queue);
goto retry;
}
ret = sd_co_rw_vector(acb);
if (ret <= 0) {
QLIST_REMOVE(acb, aiocb_siblings);
- qemu_co_queue_restart_all(&s->overwrapping_queue);
+ qemu_co_queue_restart_all(&s->overlapping_queue);
qemu_aio_unref(acb);
return ret;
}
@@ -2274,7 +2281,7 @@ retry:
qemu_coroutine_yield();
QLIST_REMOVE(acb, aiocb_siblings);
- qemu_co_queue_restart_all(&s->overwrapping_queue);
+ qemu_co_queue_restart_all(&s->overlapping_queue);
return acb->ret;
}
@@ -2291,15 +2298,15 @@ static coroutine_fn int sd_co_readv(BlockDriverState *bs, int64_t sector_num,
acb->aio_done_func = sd_finish_aiocb;
retry:
- if (check_overwrapping_aiocb(s, acb)) {
- qemu_co_queue_wait(&s->overwrapping_queue);
+ if (check_overlapping_aiocb(s, acb)) {
+ qemu_co_queue_wait(&s->overlapping_queue);
goto retry;
}
ret = sd_co_rw_vector(acb);
if (ret <= 0) {
QLIST_REMOVE(acb, aiocb_siblings);
- qemu_co_queue_restart_all(&s->overwrapping_queue);
+ qemu_co_queue_restart_all(&s->overlapping_queue);
qemu_aio_unref(acb);
return ret;
}
@@ -2307,7 +2314,7 @@ retry:
qemu_coroutine_yield();
QLIST_REMOVE(acb, aiocb_siblings);
- qemu_co_queue_restart_all(&s->overwrapping_queue);
+ qemu_co_queue_restart_all(&s->overlapping_queue);
return acb->ret;
}
@@ -2656,15 +2663,15 @@ static coroutine_fn int sd_co_discard(BlockDriverState *bs, int64_t sector_num,
acb->aio_done_func = sd_finish_aiocb;
retry:
- if (check_overwrapping_aiocb(s, acb)) {
- qemu_co_queue_wait(&s->overwrapping_queue);
+ if (check_overlapping_aiocb(s, acb)) {
+ qemu_co_queue_wait(&s->overlapping_queue);
goto retry;
}
ret = sd_co_rw_vector(acb);
if (ret <= 0) {
QLIST_REMOVE(acb, aiocb_siblings);
- qemu_co_queue_restart_all(&s->overwrapping_queue);
+ qemu_co_queue_restart_all(&s->overlapping_queue);
qemu_aio_unref(acb);
return ret;
}
@@ -2672,7 +2679,7 @@ retry:
qemu_coroutine_yield();
QLIST_REMOVE(acb, aiocb_siblings);
- qemu_co_queue_restart_all(&s->overwrapping_queue);
+ qemu_co_queue_restart_all(&s->overlapping_queue);
return acb->ret;
}
generated by cgit v1.1 at 2024-12-28 13:34:35 +0000