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-rw-r--r--block/gluster.c221
1 files changed, 74 insertions, 147 deletions
diff --git a/block/gluster.c b/block/gluster.c
index 563d497dc2..f9aea0ea27 100644
--- a/block/gluster.c
+++ b/block/gluster.c
@@ -21,19 +21,15 @@
#include "qemu/uri.h"
typedef struct GlusterAIOCB {
- BlockDriverAIOCB common;
int64_t size;
int ret;
- bool *finished;
QEMUBH *bh;
+ Coroutine *coroutine;
} GlusterAIOCB;
typedef struct BDRVGlusterState {
struct glfs *glfs;
- int fds[2];
struct glfs_fd *fd;
- int event_reader_pos;
- GlusterAIOCB *event_acb;
} BDRVGlusterState;
#define GLUSTER_FD_READ 0
@@ -231,46 +227,13 @@ out:
return NULL;
}
-static void qemu_gluster_complete_aio(GlusterAIOCB *acb, BDRVGlusterState *s)
+static void qemu_gluster_complete_aio(void *opaque)
{
- int ret;
- bool *finished = acb->finished;
- BlockDriverCompletionFunc *cb = acb->common.cb;
- void *opaque = acb->common.opaque;
-
- if (!acb->ret || acb->ret == acb->size) {
- ret = 0; /* Success */
- } else if (acb->ret < 0) {
- ret = acb->ret; /* Read/Write failed */
- } else {
- ret = -EIO; /* Partial read/write - fail it */
- }
+ GlusterAIOCB *acb = (GlusterAIOCB *)opaque;
- qemu_aio_release(acb);
- cb(opaque, ret);
- if (finished) {
- *finished = true;
- }
-}
-
-static void qemu_gluster_aio_event_reader(void *opaque)
-{
- BDRVGlusterState *s = opaque;
- ssize_t ret;
-
- do {
- char *p = (char *)&s->event_acb;
-
- ret = read(s->fds[GLUSTER_FD_READ], p + s->event_reader_pos,
- sizeof(s->event_acb) - s->event_reader_pos);
- if (ret > 0) {
- s->event_reader_pos += ret;
- if (s->event_reader_pos == sizeof(s->event_acb)) {
- s->event_reader_pos = 0;
- qemu_gluster_complete_aio(s->event_acb, s);
- }
- }
- } while (ret < 0 && errno == EINTR);
+ qemu_bh_delete(acb->bh);
+ acb->bh = NULL;
+ qemu_coroutine_enter(acb->coroutine, NULL);
}
/* TODO Convert to fine grained options */
@@ -309,7 +272,6 @@ static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
filename = qemu_opt_get(opts, "filename");
-
s->glfs = qemu_gluster_init(gconf, filename);
if (!s->glfs) {
ret = -errno;
@@ -329,17 +291,7 @@ static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
s->fd = glfs_open(s->glfs, gconf->image, open_flags);
if (!s->fd) {
ret = -errno;
- goto out;
- }
-
- ret = qemu_pipe(s->fds);
- if (ret < 0) {
- ret = -errno;
- goto out;
}
- fcntl(s->fds[GLUSTER_FD_READ], F_SETFL, O_NONBLOCK);
- qemu_aio_set_fd_handler(s->fds[GLUSTER_FD_READ],
- qemu_gluster_aio_event_reader, NULL, s);
out:
qemu_opts_del(opts);
@@ -398,58 +350,37 @@ out:
return ret;
}
-static void qemu_gluster_aio_cancel(BlockDriverAIOCB *blockacb)
-{
- GlusterAIOCB *acb = (GlusterAIOCB *)blockacb;
- bool finished = false;
-
- acb->finished = &finished;
- while (!finished) {
- qemu_aio_wait();
- }
-}
-
-static const AIOCBInfo gluster_aiocb_info = {
- .aiocb_size = sizeof(GlusterAIOCB),
- .cancel = qemu_gluster_aio_cancel,
-};
-
+/*
+ * AIO callback routine called from GlusterFS thread.
+ */
static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret, void *arg)
{
GlusterAIOCB *acb = (GlusterAIOCB *)arg;
- BlockDriverState *bs = acb->common.bs;
- BDRVGlusterState *s = bs->opaque;
- int retval;
-
- acb->ret = ret;
- retval = qemu_write_full(s->fds[GLUSTER_FD_WRITE], &acb, sizeof(acb));
- if (retval != sizeof(acb)) {
- /*
- * Gluster AIO callback thread failed to notify the waiting
- * QEMU thread about IO completion.
- */
- error_report("Gluster AIO completion failed: %s", strerror(errno));
- abort();
+
+ if (!ret || ret == acb->size) {
+ acb->ret = 0; /* Success */
+ } else if (ret < 0) {
+ acb->ret = ret; /* Read/Write failed */
+ } else {
+ acb->ret = -EIO; /* Partial read/write - fail it */
}
+
+ acb->bh = qemu_bh_new(qemu_gluster_complete_aio, acb);
+ qemu_bh_schedule(acb->bh);
}
-static BlockDriverAIOCB *qemu_gluster_aio_rw(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque, int write)
+static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, QEMUIOVector *qiov, int write)
{
int ret;
- GlusterAIOCB *acb;
+ GlusterAIOCB *acb = g_slice_new(GlusterAIOCB);
BDRVGlusterState *s = bs->opaque;
- size_t size;
- off_t offset;
+ size_t size = nb_sectors * BDRV_SECTOR_SIZE;
+ off_t offset = sector_num * BDRV_SECTOR_SIZE;
- offset = sector_num * BDRV_SECTOR_SIZE;
- size = nb_sectors * BDRV_SECTOR_SIZE;
-
- acb = qemu_aio_get(&gluster_aiocb_info, bs, cb, opaque);
acb->size = size;
acb->ret = 0;
- acb->finished = NULL;
+ acb->coroutine = qemu_coroutine_self();
if (write) {
ret = glfs_pwritev_async(s->fd, qiov->iov, qiov->niov, offset, 0,
@@ -460,13 +391,16 @@ static BlockDriverAIOCB *qemu_gluster_aio_rw(BlockDriverState *bs,
}
if (ret < 0) {
+ ret = -errno;
goto out;
}
- return &acb->common;
+
+ qemu_coroutine_yield();
+ ret = acb->ret;
out:
- qemu_aio_release(acb);
- return NULL;
+ g_slice_free(GlusterAIOCB, acb);
+ return ret;
}
static int qemu_gluster_truncate(BlockDriverState *bs, int64_t offset)
@@ -482,71 +416,68 @@ static int qemu_gluster_truncate(BlockDriverState *bs, int64_t offset)
return 0;
}
-static BlockDriverAIOCB *qemu_gluster_aio_readv(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
+static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
{
- return qemu_gluster_aio_rw(bs, sector_num, qiov, nb_sectors, cb, opaque, 0);
+ return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 0);
}
-static BlockDriverAIOCB *qemu_gluster_aio_writev(BlockDriverState *bs,
- int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
- BlockDriverCompletionFunc *cb, void *opaque)
+static coroutine_fn int qemu_gluster_co_writev(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
{
- return qemu_gluster_aio_rw(bs, sector_num, qiov, nb_sectors, cb, opaque, 1);
+ return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 1);
}
-static BlockDriverAIOCB *qemu_gluster_aio_flush(BlockDriverState *bs,
- BlockDriverCompletionFunc *cb, void *opaque)
+static coroutine_fn int qemu_gluster_co_flush_to_disk(BlockDriverState *bs)
{
int ret;
- GlusterAIOCB *acb;
+ GlusterAIOCB *acb = g_slice_new(GlusterAIOCB);
BDRVGlusterState *s = bs->opaque;
- acb = qemu_aio_get(&gluster_aiocb_info, bs, cb, opaque);
acb->size = 0;
acb->ret = 0;
- acb->finished = NULL;
+ acb->coroutine = qemu_coroutine_self();
ret = glfs_fsync_async(s->fd, &gluster_finish_aiocb, acb);
if (ret < 0) {
+ ret = -errno;
goto out;
}
- return &acb->common;
+
+ qemu_coroutine_yield();
+ ret = acb->ret;
out:
- qemu_aio_release(acb);
- return NULL;
+ g_slice_free(GlusterAIOCB, acb);
+ return ret;
}
#ifdef CONFIG_GLUSTERFS_DISCARD
-static BlockDriverAIOCB *qemu_gluster_aio_discard(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, BlockDriverCompletionFunc *cb,
- void *opaque)
+static coroutine_fn int qemu_gluster_co_discard(BlockDriverState *bs,
+ int64_t sector_num, int nb_sectors)
{
int ret;
- GlusterAIOCB *acb;
+ GlusterAIOCB *acb = g_slice_new(GlusterAIOCB);
BDRVGlusterState *s = bs->opaque;
- size_t size;
- off_t offset;
-
- offset = sector_num * BDRV_SECTOR_SIZE;
- size = nb_sectors * BDRV_SECTOR_SIZE;
+ size_t size = nb_sectors * BDRV_SECTOR_SIZE;
+ off_t offset = sector_num * BDRV_SECTOR_SIZE;
- acb = qemu_aio_get(&gluster_aiocb_info, bs, cb, opaque);
acb->size = 0;
acb->ret = 0;
- acb->finished = NULL;
+ acb->coroutine = qemu_coroutine_self();
ret = glfs_discard_async(s->fd, offset, size, &gluster_finish_aiocb, acb);
if (ret < 0) {
+ ret = -errno;
goto out;
}
- return &acb->common;
+
+ qemu_coroutine_yield();
+ ret = acb->ret;
out:
- qemu_aio_release(acb);
- return NULL;
+ g_slice_free(GlusterAIOCB, acb);
+ return ret;
}
#endif
@@ -581,10 +512,6 @@ static void qemu_gluster_close(BlockDriverState *bs)
{
BDRVGlusterState *s = bs->opaque;
- close(s->fds[GLUSTER_FD_READ]);
- close(s->fds[GLUSTER_FD_WRITE]);
- qemu_aio_set_fd_handler(s->fds[GLUSTER_FD_READ], NULL, NULL, NULL);
-
if (s->fd) {
glfs_close(s->fd);
s->fd = NULL;
@@ -618,12 +545,12 @@ static BlockDriver bdrv_gluster = {
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
- .bdrv_aio_readv = qemu_gluster_aio_readv,
- .bdrv_aio_writev = qemu_gluster_aio_writev,
- .bdrv_aio_flush = qemu_gluster_aio_flush,
+ .bdrv_co_readv = qemu_gluster_co_readv,
+ .bdrv_co_writev = qemu_gluster_co_writev,
+ .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_aio_discard = qemu_gluster_aio_discard,
+ .bdrv_co_discard = qemu_gluster_co_discard,
#endif
.create_options = qemu_gluster_create_options,
};
@@ -639,12 +566,12 @@ static BlockDriver bdrv_gluster_tcp = {
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
- .bdrv_aio_readv = qemu_gluster_aio_readv,
- .bdrv_aio_writev = qemu_gluster_aio_writev,
- .bdrv_aio_flush = qemu_gluster_aio_flush,
+ .bdrv_co_readv = qemu_gluster_co_readv,
+ .bdrv_co_writev = qemu_gluster_co_writev,
+ .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_aio_discard = qemu_gluster_aio_discard,
+ .bdrv_co_discard = qemu_gluster_co_discard,
#endif
.create_options = qemu_gluster_create_options,
};
@@ -660,12 +587,12 @@ static BlockDriver bdrv_gluster_unix = {
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
- .bdrv_aio_readv = qemu_gluster_aio_readv,
- .bdrv_aio_writev = qemu_gluster_aio_writev,
- .bdrv_aio_flush = qemu_gluster_aio_flush,
+ .bdrv_co_readv = qemu_gluster_co_readv,
+ .bdrv_co_writev = qemu_gluster_co_writev,
+ .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_aio_discard = qemu_gluster_aio_discard,
+ .bdrv_co_discard = qemu_gluster_co_discard,
#endif
.create_options = qemu_gluster_create_options,
};
@@ -681,12 +608,12 @@ static BlockDriver bdrv_gluster_rdma = {
.bdrv_getlength = qemu_gluster_getlength,
.bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size,
.bdrv_truncate = qemu_gluster_truncate,
- .bdrv_aio_readv = qemu_gluster_aio_readv,
- .bdrv_aio_writev = qemu_gluster_aio_writev,
- .bdrv_aio_flush = qemu_gluster_aio_flush,
+ .bdrv_co_readv = qemu_gluster_co_readv,
+ .bdrv_co_writev = qemu_gluster_co_writev,
+ .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_aio_discard = qemu_gluster_aio_discard,
+ .bdrv_co_discard = qemu_gluster_co_discard,
#endif
.create_options = qemu_gluster_create_options,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-26 06:02:40 +0000