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bdev/malloc: create a malloc_task context

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This prepares for future scatter-gather support.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ie21c4d86c1e932dcaf63cf13d7a7198890595d79
This commit is contained in:
Jim Harris 2016-10-13 11:38:17 -07:00
parent 52d2405f70
commit 8e03aa1f3c
1 changed files with 53 additions and 25 deletions
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78
lib/bdev/malloc/blockdev_malloc.c
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@ -54,18 +54,35 @@ struct malloc_disk {
struct malloc_disk *next;
};
struct malloc_task {
int num_outstanding;
enum spdk_bdev_io_status status;
};
static struct malloc_task *
__malloc_task_from_copy_task(struct copy_task *ct)
{
return (struct malloc_task *)((uintptr_t)ct - sizeof(struct malloc_task));
}
static struct copy_task *
__copy_task_from_malloc_task(struct malloc_task *mt)
{
return (struct copy_task *)((uintptr_t)mt + sizeof(struct malloc_task));
}
static void
malloc_done(void *ref, int status)
{
struct copy_task *cp_task = (struct copy_task *)ref;
enum spdk_bdev_io_status bdev_status;
struct malloc_task *task = __malloc_task_from_copy_task(ref);
if (status != 0) {
bdev_status = SPDK_BDEV_IO_STATUS_FAILED;
} else {
bdev_status = SPDK_BDEV_IO_STATUS_SUCCESS;
task->status = SPDK_BDEV_IO_STATUS_FAILED;
}
if (--task->num_outstanding == 0) {
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(task), task->status);
}
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(cp_task), bdev_status);
}
static struct malloc_disk *g_malloc_disk_head = NULL;
@ -79,7 +96,7 @@ static void blockdev_malloc_get_spdk_running_config(FILE *fp);
static int
blockdev_malloc_get_ctx_size(void)
{
return spdk_copy_module_get_max_ctx_size();
return sizeof(struct malloc_task) + spdk_copy_module_get_max_ctx_size();
}
SPDK_BDEV_MODULE_REGISTER(blockdev_malloc_initialize, blockdev_malloc_finish,
@ -120,7 +137,7 @@ blockdev_malloc_destruct(struct spdk_bdev *bdev)
static void
blockdev_malloc_read(struct malloc_disk *mdisk, struct spdk_io_channel *ch,
struct copy_task *copy_req,
struct malloc_task *task,
void *buf, uint64_t nbytes, uint64_t offset)
{
int64_t rc;
@ -128,40 +145,47 @@ blockdev_malloc_read(struct malloc_disk *mdisk, struct spdk_io_channel *ch,
SPDK_TRACELOG(SPDK_TRACE_MALLOC, "read %lu bytes from offset %#lx to %p\n",
nbytes, offset, buf);
rc = spdk_copy_submit(copy_req, ch, buf, mdisk->malloc_buf + offset, nbytes, malloc_done);
task->status = SPDK_BDEV_IO_STATUS_SUCCESS;
task->num_outstanding = 1;
rc = spdk_copy_submit(__copy_task_from_malloc_task(task), ch, buf,
mdisk->malloc_buf + offset, nbytes, malloc_done);
if (rc != (int64_t)nbytes) {
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(copy_req), SPDK_BDEV_IO_STATUS_FAILED);
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(task), SPDK_BDEV_IO_STATUS_FAILED);
}
}
static void
blockdev_malloc_writev(struct malloc_disk *mdisk, struct spdk_io_channel *ch,
struct copy_task *copy_req,
struct malloc_task *task,
struct iovec *iov, int iovcnt, size_t len, uint64_t offset)
{
int64_t rc;
if ((iovcnt != 1) || (iov->iov_len != len)) {
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(copy_req), SPDK_BDEV_IO_STATUS_FAILED);
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(task), SPDK_BDEV_IO_STATUS_FAILED);
return;
}
SPDK_TRACELOG(SPDK_TRACE_MALLOC, "wrote %lu bytes to offset %#lx from %p\n",
iov->iov_len, offset, iov->iov_base);
rc = spdk_copy_submit(copy_req, ch, mdisk->malloc_buf + offset,
task->status = SPDK_BDEV_IO_STATUS_SUCCESS;
task->num_outstanding = 1;
rc = spdk_copy_submit(__copy_task_from_malloc_task(task), ch, mdisk->malloc_buf + offset,
iov->iov_base, len, malloc_done);
if (rc != (int64_t)len) {
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(copy_req), SPDK_BDEV_IO_STATUS_FAILED);
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(task), SPDK_BDEV_IO_STATUS_FAILED);
}
}
static int
blockdev_malloc_unmap(struct malloc_disk *mdisk,
struct spdk_io_channel *ch,
struct copy_task *copy_req,
struct malloc_task *task,
struct spdk_scsi_unmap_bdesc *unmap_d,
uint16_t bdesc_count)
{
@ -185,22 +209,26 @@ blockdev_malloc_unmap(struct malloc_disk *mdisk,
return -1;
}
return spdk_copy_submit_fill(copy_req, ch, mdisk->malloc_buf + offset, 0, byte_count, malloc_done);
task->status = SPDK_BDEV_IO_STATUS_SUCCESS;
task->num_outstanding = 1;
return spdk_copy_submit_fill(__copy_task_from_malloc_task(task), ch,
mdisk->malloc_buf + offset, 0, byte_count, malloc_done);
}
static int64_t
blockdev_malloc_flush(struct malloc_disk *mdisk, struct copy_task *copy_req,
blockdev_malloc_flush(struct malloc_disk *mdisk, struct malloc_task *task,
uint64_t offset, uint64_t nbytes)
{
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(copy_req), SPDK_BDEV_IO_STATUS_SUCCESS);
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(task), SPDK_BDEV_IO_STATUS_SUCCESS);
return 0;
}
static int
blockdev_malloc_reset(struct malloc_disk *mdisk, struct copy_task *copy_req)
blockdev_malloc_reset(struct malloc_disk *mdisk, struct malloc_task *task)
{
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(copy_req), SPDK_BDEV_IO_STATUS_SUCCESS);
spdk_bdev_io_complete(spdk_bdev_io_from_ctx(task), SPDK_BDEV_IO_STATUS_SUCCESS);
return 0;
}
@ -219,7 +247,7 @@ static int _blockdev_malloc_submit_request(struct spdk_bdev_io *bdev_io)
blockdev_malloc_read((struct malloc_disk *)bdev_io->ctx,
bdev_io->ch,
(struct copy_task *)bdev_io->driver_ctx,
(struct malloc_task *)bdev_io->driver_ctx,
bdev_io->u.read.buf,
bdev_io->u.read.nbytes,
bdev_io->u.read.offset);
@ -228,7 +256,7 @@ static int _blockdev_malloc_submit_request(struct spdk_bdev_io *bdev_io)
case SPDK_BDEV_IO_TYPE_WRITE:
blockdev_malloc_writev((struct malloc_disk *)bdev_io->ctx,
bdev_io->ch,
(struct copy_task *)bdev_io->driver_ctx,
(struct malloc_task *)bdev_io->driver_ctx,
bdev_io->u.write.iovs,
bdev_io->u.write.iovcnt,
bdev_io->u.write.len,
@ -237,18 +265,18 @@ static int _blockdev_malloc_submit_request(struct spdk_bdev_io *bdev_io)
case SPDK_BDEV_IO_TYPE_RESET:
return blockdev_malloc_reset((struct malloc_disk *)bdev_io->ctx,
(struct copy_task *)bdev_io->driver_ctx);
(struct malloc_task *)bdev_io->driver_ctx);
case SPDK_BDEV_IO_TYPE_FLUSH:
return blockdev_malloc_flush((struct malloc_disk *)bdev_io->ctx,
(struct copy_task *)bdev_io->driver_ctx,
(struct malloc_task *)bdev_io->driver_ctx,
bdev_io->u.flush.offset,
bdev_io->u.flush.length);
case SPDK_BDEV_IO_TYPE_UNMAP:
return blockdev_malloc_unmap((struct malloc_disk *)bdev_io->ctx,
bdev_io->ch,
(struct copy_task *)bdev_io->driver_ctx,
(struct malloc_task *)bdev_io->driver_ctx,
bdev_io->u.unmap.unmap_bdesc,
bdev_io->u.unmap.bdesc_count);
default: