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module/raid: support for raid module private io channel

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Let the raid modules create their own IO channels by implementing the
get_io_channel callback.

Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Change-Id: Id4f6c90721474edd70a6e987c67f8f774737da27
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7700
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Artur Paszkiewicz 2019-12-09 15:44:08 +01:00 committed by Tomasz Zawadzki
parent 95a0494902
commit c89e20084b
2 changed files with 35 additions and 9 deletions
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35
module/bdev/raid/bdev_raid.c
View File

@ -91,6 +91,7 @@ raid_bdev_create_cb(void *io_device, void *ctx_buf)
struct raid_bdev *raid_bdev = io_device;
struct raid_bdev_io_channel *raid_ch = ctx_buf;
uint8_t i;
int ret = 0;
SPDK_DEBUGLOG(bdev_raid, "raid_bdev_create_cb, %p\n", raid_ch);
@ -114,19 +115,30 @@ raid_bdev_create_cb(void *io_device, void *ctx_buf)
raid_ch->base_channel[i] = spdk_bdev_get_io_channel(
raid_bdev->base_bdev_info[i].desc);
if (!raid_ch->base_channel[i]) {
uint8_t j;
for (j = 0; j < i; j++) {
spdk_put_io_channel(raid_ch->base_channel[j]);
}
free(raid_ch->base_channel);
raid_ch->base_channel = NULL;
SPDK_ERRLOG("Unable to create io channel for base bdev\n");
return -ENOMEM;
ret = -ENOMEM;
break;
}
}
return 0;
if (!ret && raid_bdev->module->get_io_channel) {
raid_ch->module_channel = raid_bdev->module->get_io_channel(raid_bdev);
if (!raid_ch->module_channel) {
SPDK_ERRLOG("Unable to create io channel for raid module\n");
ret = -ENOMEM;
}
}
if (ret) {
uint8_t j;
for (j = 0; j < i; j++) {
spdk_put_io_channel(raid_ch->base_channel[j]);
}
free(raid_ch->base_channel);
raid_ch->base_channel = NULL;
}
return ret;
}
/*
@ -149,6 +161,11 @@ raid_bdev_destroy_cb(void *io_device, void *ctx_buf)
assert(raid_ch != NULL);
assert(raid_ch->base_channel);
if (raid_ch->module_channel) {
spdk_put_io_channel(raid_ch->module_channel);
}
for (i = 0; i < raid_ch->num_channels; i++) {
/* Free base bdev channels */
assert(raid_ch->base_channel[i] != NULL);

9
module/bdev/raid/bdev_raid.h
View File

@ -199,6 +199,9 @@ struct raid_bdev_io_channel {
/* Number of IO channels */
uint8_t num_channels;
/* Private raid module IO channel */
struct spdk_io_channel *module_channel;
};
/* TAIL heads for various raid bdev lists */
@ -265,6 +268,12 @@ struct raid_bdev_module {
/* Handler for requests without payload (flush, unmap). Optional. */
void (*submit_null_payload_request)(struct raid_bdev_io *raid_io);
/*
* Called when the bdev's IO channel is created to get the module's private IO channel.
* Optional.
*/
struct spdk_io_channel *(*get_io_channel)(struct raid_bdev *raid_bdev);
TAILQ_ENTRY(raid_bdev_module) link;
};