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hello_bdev: add spdk_bdev_queue_io_wait to hello_bdev example

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Signed-off-by: Piotr Pelplinski <piotr.pelplinski@intel.com>
Change-Id: I358c7bd567166ffaf26b526bd69d030485611fe5

Reviewed-on: https://review.gerrithub.io/429855
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Piotr Pelplinski 2018-10-16 09:27:30 +02:00 committed by Jim Harris
parent 23670d8db7
commit f26b1fca5f
1 changed files with 55 additions and 20 deletions
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75
examples/bdev/hello_world/hello_bdev.c
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@ -52,6 +52,7 @@ struct hello_context_t {
struct spdk_io_channel *bdev_io_channel;
char *buff;
char *bdev_name;
struct spdk_bdev_io_wait_entry bdev_io_wait;
};
/*
@ -97,6 +98,33 @@ read_complete(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
spdk_app_stop(success ? 0 : -1);
}
static void
hello_read(void *arg)
{
struct hello_context_t *hello_context = arg;
int rc = 0;
uint32_t length = spdk_bdev_get_block_size(hello_context->bdev);
SPDK_NOTICELOG("Reading io\n");
rc = spdk_bdev_read(hello_context->bdev_desc, hello_context->bdev_io_channel,
hello_context->buff, 0, length, read_complete, hello_context);
if (rc == -ENOMEM) {
SPDK_NOTICELOG("Queueing io\n");
/* In case we cannot perform I/O now, queue I/O */
hello_context->bdev_io_wait.bdev = hello_context->bdev;
hello_context->bdev_io_wait.cb_fn = hello_read;
hello_context->bdev_io_wait.cb_arg = hello_context;
spdk_bdev_queue_io_wait(hello_context->bdev, hello_context->bdev_io_channel,
&hello_context->bdev_io_wait);
} else if (rc) {
SPDK_ERRLOG("%s error while reading from bdev: %d\n", spdk_strerror(-rc), rc);
spdk_put_io_channel(hello_context->bdev_io_channel);
spdk_bdev_close(hello_context->bdev_desc);
spdk_app_stop(-1);
}
}
/*
* Callback function for write io completion.
*/
@ -104,8 +132,7 @@ static void
write_complete(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
{
struct hello_context_t *hello_context = cb_arg;
int rc;
uint32_t blk_size;
uint32_t length;
/* Complete the I/O */
spdk_bdev_free_io(bdev_io);
@ -121,19 +148,36 @@ write_complete(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
}
/* Zero the buffer so that we can use it for reading */
blk_size = spdk_bdev_get_block_size(hello_context->bdev);
memset(hello_context->buff, 0, blk_size);
length = spdk_bdev_get_block_size(hello_context->bdev);
memset(hello_context->buff, 0, length);
SPDK_NOTICELOG("Reading io\n");
rc = spdk_bdev_read(hello_context->bdev_desc, hello_context->bdev_io_channel,
hello_context->buff, 0, blk_size, read_complete, hello_context);
hello_read(hello_context);
}
if (rc) {
SPDK_ERRLOG("%s error while reading from bdev: %d\n", spdk_strerror(-rc), rc);
static void
hello_write(void *arg)
{
struct hello_context_t *hello_context = arg;
int rc = 0;
uint32_t length = spdk_bdev_get_block_size(hello_context->bdev);
SPDK_NOTICELOG("Writing to the bdev\n");
rc = spdk_bdev_write(hello_context->bdev_desc, hello_context->bdev_io_channel,
hello_context->buff, 0, length, write_complete, hello_context);
if (rc == -ENOMEM) {
SPDK_NOTICELOG("Queueing io\n");
/* In case we cannot perform I/O now, queue I/O */
hello_context->bdev_io_wait.bdev = hello_context->bdev;
hello_context->bdev_io_wait.cb_fn = hello_write;
hello_context->bdev_io_wait.cb_arg = hello_context;
spdk_bdev_queue_io_wait(hello_context->bdev, hello_context->bdev_io_channel,
&hello_context->bdev_io_wait);
} else if (rc) {
SPDK_ERRLOG("%s error while writing to bdev: %d\n", spdk_strerror(-rc), rc);
spdk_put_io_channel(hello_context->bdev_io_channel);
spdk_bdev_close(hello_context->bdev_desc);
spdk_app_stop(-1);
return;
}
}
@ -200,16 +244,7 @@ hello_start(void *arg1, void *arg2)
}
snprintf(hello_context->buff, blk_size, "%s", "Hello World!\n");
SPDK_NOTICELOG("Writing to the bdev\n");
rc = spdk_bdev_write(hello_context->bdev_desc, hello_context->bdev_io_channel,
hello_context->buff, 0, blk_size, write_complete, hello_context);
if (rc) {
SPDK_ERRLOG("%s error while writing to bdev: %d\n", spdk_strerror(-rc), rc);
spdk_bdev_close(hello_context->bdev_desc);
spdk_put_io_channel(hello_context->bdev_io_channel);
spdk_app_stop(-1);
return;
}
hello_write(hello_context);
}
int