105dcc0bd9
by placing the destroy function in the callback of the io_device_unregister, we ensure that all channels associated with a bdev will be freed before the bdev is destroyed. This eliminates the possibility of an io_channel callback referencing a destroyed bdev. Change-Id: I0dd6f53dcfa9c9c5a3c6e98a7e2ad8687da17c3f Signed-off-by: Seth Howell <seth.howell@intel.com> Reviewed-on: https://review.gerrithub.io/406248 Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
2901 lines
73 KiB
C
2901 lines
73 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "spdk/stdinc.h"
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#include "spdk/bdev.h"
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#include "spdk/conf.h"
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#include "spdk/env.h"
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#include "spdk/event.h"
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#include "spdk/io_channel.h"
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#include "spdk/likely.h"
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#include "spdk/queue.h"
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#include "spdk/nvme_spec.h"
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#include "spdk/scsi_spec.h"
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#include "spdk/util.h"
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#include "spdk_internal/bdev.h"
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#include "spdk_internal/log.h"
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#include "spdk/string.h"
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#ifdef SPDK_CONFIG_VTUNE
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#include "ittnotify.h"
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#include "ittnotify_types.h"
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int __itt_init_ittlib(const char *, __itt_group_id);
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#endif
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#define SPDK_BDEV_IO_POOL_SIZE (64 * 1024)
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#define SPDK_BDEV_IO_CACHE_SIZE 256
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#define BUF_SMALL_POOL_SIZE 8192
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#define BUF_LARGE_POOL_SIZE 1024
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#define NOMEM_THRESHOLD_COUNT 8
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#define ZERO_BUFFER_SIZE 0x100000
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#define SPDK_BDEV_QOS_TIMESLICE_IN_USEC 1000
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#define SPDK_BDEV_SEC_TO_USEC 1000000ULL
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#define SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE 1
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#define SPDK_BDEV_QOS_MIN_IOS_PER_SEC 10000
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typedef TAILQ_HEAD(, spdk_bdev_io) bdev_io_tailq_t;
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typedef STAILQ_HEAD(, spdk_bdev_io) bdev_io_stailq_t;
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struct spdk_bdev_mgr {
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struct spdk_mempool *bdev_io_pool;
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struct spdk_mempool *buf_small_pool;
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struct spdk_mempool *buf_large_pool;
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void *zero_buffer;
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TAILQ_HEAD(, spdk_bdev_module) bdev_modules;
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TAILQ_HEAD(, spdk_bdev) bdevs;
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bool init_complete;
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bool module_init_complete;
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#ifdef SPDK_CONFIG_VTUNE
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__itt_domain *domain;
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#endif
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};
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static struct spdk_bdev_mgr g_bdev_mgr = {
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.bdev_modules = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdev_modules),
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.bdevs = TAILQ_HEAD_INITIALIZER(g_bdev_mgr.bdevs),
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.init_complete = false,
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.module_init_complete = false,
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};
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static spdk_bdev_init_cb g_init_cb_fn = NULL;
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static void *g_init_cb_arg = NULL;
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static spdk_bdev_fini_cb g_fini_cb_fn = NULL;
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static void *g_fini_cb_arg = NULL;
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static struct spdk_thread *g_fini_thread = NULL;
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struct spdk_bdev_mgmt_channel {
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bdev_io_stailq_t need_buf_small;
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bdev_io_stailq_t need_buf_large;
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/*
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* Each thread keeps a cache of bdev_io - this allows
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* bdev threads which are *not* DPDK threads to still
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* benefit from a per-thread bdev_io cache. Without
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* this, non-DPDK threads fetching from the mempool
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* incur a cmpxchg on get and put.
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*/
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bdev_io_stailq_t per_thread_cache;
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uint32_t per_thread_cache_count;
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TAILQ_HEAD(, spdk_bdev_module_channel) module_channels;
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};
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struct spdk_bdev_desc {
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struct spdk_bdev *bdev;
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spdk_bdev_remove_cb_t remove_cb;
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void *remove_ctx;
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bool write;
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TAILQ_ENTRY(spdk_bdev_desc) link;
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};
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#define BDEV_CH_RESET_IN_PROGRESS (1 << 0)
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#define BDEV_CH_QOS_ENABLED (1 << 1)
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struct spdk_bdev_channel {
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struct spdk_bdev *bdev;
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/* The channel for the underlying device */
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struct spdk_io_channel *channel;
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/* Channel for the bdev manager */
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struct spdk_io_channel *mgmt_channel;
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struct spdk_bdev_io_stat stat;
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/*
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* Count of I/O submitted through this channel and waiting for completion.
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* Incremented before submit_request() is called on an spdk_bdev_io.
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*/
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uint64_t io_outstanding;
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bdev_io_tailq_t queued_resets;
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uint32_t flags;
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/*
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* Rate limiting on this channel.
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* Queue of IO awaiting issue because of a QoS rate limiting happened
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* on this channel.
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*/
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bdev_io_tailq_t qos_io;
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/*
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* Rate limiting on this channel.
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* Maximum allowed IOs to be issued in one timeslice (e.g., 1ms) and
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* only valid for the master channel which manages the outstanding IOs.
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*/
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uint64_t qos_max_ios_per_timeslice;
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/*
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* Rate limiting on this channel.
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* Submitted IO in one timeslice (e.g., 1ms)
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*/
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uint64_t io_submitted_this_timeslice;
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/*
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* Rate limiting on this channel.
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* Periodic running QoS poller in millisecond.
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*/
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struct spdk_poller *qos_poller;
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/* Per-device channel */
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struct spdk_bdev_module_channel *module_ch;
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#ifdef SPDK_CONFIG_VTUNE
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uint64_t start_tsc;
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uint64_t interval_tsc;
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__itt_string_handle *handle;
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#endif
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};
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#define __bdev_to_io_dev(bdev) (((char *)bdev) + 1)
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#define __bdev_from_io_dev(io_dev) ((struct spdk_bdev *)(((char *)io_dev) - 1))
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/*
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* Per-module (or per-io_device) channel. Multiple bdevs built on the same io_device
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* will queue here their IO that awaits retry. It makes it posible to retry sending
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* IO to one bdev after IO from other bdev completes.
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*/
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struct spdk_bdev_module_channel {
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/*
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* Count of I/O submitted to bdev module and waiting for completion.
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* Incremented before submit_request() is called on an spdk_bdev_io.
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*/
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uint64_t io_outstanding;
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/*
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* Queue of IO awaiting retry because of a previous NOMEM status returned
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* on this channel.
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*/
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bdev_io_tailq_t nomem_io;
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/*
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* Threshold which io_outstanding must drop to before retrying nomem_io.
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*/
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uint64_t nomem_threshold;
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/* I/O channel allocated by a bdev module */
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struct spdk_io_channel *module_ch;
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uint32_t ref;
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TAILQ_ENTRY(spdk_bdev_module_channel) link;
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};
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static void spdk_bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg);
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struct spdk_bdev *
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spdk_bdev_first(void)
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{
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struct spdk_bdev *bdev;
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bdev = TAILQ_FIRST(&g_bdev_mgr.bdevs);
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if (bdev) {
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SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Starting bdev iteration at %s\n", bdev->name);
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}
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return bdev;
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}
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struct spdk_bdev *
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spdk_bdev_next(struct spdk_bdev *prev)
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{
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struct spdk_bdev *bdev;
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bdev = TAILQ_NEXT(prev, link);
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if (bdev) {
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SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Continuing bdev iteration at %s\n", bdev->name);
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}
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return bdev;
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}
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static struct spdk_bdev *
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_bdev_next_leaf(struct spdk_bdev *bdev)
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{
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while (bdev != NULL) {
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if (bdev->claim_module == NULL) {
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return bdev;
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} else {
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bdev = TAILQ_NEXT(bdev, link);
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}
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}
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return bdev;
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}
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struct spdk_bdev *
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spdk_bdev_first_leaf(void)
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{
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struct spdk_bdev *bdev;
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bdev = _bdev_next_leaf(TAILQ_FIRST(&g_bdev_mgr.bdevs));
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if (bdev) {
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SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Starting bdev iteration at %s\n", bdev->name);
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}
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return bdev;
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}
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struct spdk_bdev *
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spdk_bdev_next_leaf(struct spdk_bdev *prev)
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{
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struct spdk_bdev *bdev;
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bdev = _bdev_next_leaf(TAILQ_NEXT(prev, link));
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if (bdev) {
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SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Continuing bdev iteration at %s\n", bdev->name);
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}
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return bdev;
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}
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struct spdk_bdev *
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spdk_bdev_get_by_name(const char *bdev_name)
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{
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struct spdk_bdev_alias *tmp;
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struct spdk_bdev *bdev = spdk_bdev_first();
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while (bdev != NULL) {
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if (strcmp(bdev_name, bdev->name) == 0) {
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return bdev;
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}
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TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
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if (strcmp(bdev_name, tmp->alias) == 0) {
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return bdev;
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}
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}
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bdev = spdk_bdev_next(bdev);
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}
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return NULL;
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}
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static void
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spdk_bdev_io_set_buf(struct spdk_bdev_io *bdev_io, void *buf)
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{
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assert(bdev_io->get_buf_cb != NULL);
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assert(buf != NULL);
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assert(bdev_io->u.bdev.iovs != NULL);
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bdev_io->buf = buf;
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bdev_io->u.bdev.iovs[0].iov_base = (void *)((unsigned long)((char *)buf + 512) & ~511UL);
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bdev_io->u.bdev.iovs[0].iov_len = bdev_io->buf_len;
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bdev_io->get_buf_cb(bdev_io->ch->channel, bdev_io);
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}
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static void
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spdk_bdev_io_put_buf(struct spdk_bdev_io *bdev_io)
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{
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struct spdk_mempool *pool;
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struct spdk_bdev_io *tmp;
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void *buf;
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bdev_io_stailq_t *stailq;
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struct spdk_bdev_mgmt_channel *ch;
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assert(bdev_io->u.bdev.iovcnt == 1);
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buf = bdev_io->buf;
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ch = bdev_io->mgmt_ch;
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if (bdev_io->buf_len <= SPDK_BDEV_SMALL_BUF_MAX_SIZE) {
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pool = g_bdev_mgr.buf_small_pool;
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stailq = &ch->need_buf_small;
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} else {
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pool = g_bdev_mgr.buf_large_pool;
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stailq = &ch->need_buf_large;
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}
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if (STAILQ_EMPTY(stailq)) {
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spdk_mempool_put(pool, buf);
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} else {
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tmp = STAILQ_FIRST(stailq);
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STAILQ_REMOVE_HEAD(stailq, buf_link);
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spdk_bdev_io_set_buf(tmp, buf);
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}
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}
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void
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spdk_bdev_io_get_buf(struct spdk_bdev_io *bdev_io, spdk_bdev_io_get_buf_cb cb, uint64_t len)
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{
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struct spdk_mempool *pool;
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bdev_io_stailq_t *stailq;
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void *buf = NULL;
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struct spdk_bdev_mgmt_channel *ch;
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assert(cb != NULL);
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assert(bdev_io->u.bdev.iovs != NULL);
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if (spdk_unlikely(bdev_io->u.bdev.iovs[0].iov_base != NULL)) {
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/* Buffer already present */
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cb(bdev_io->ch->channel, bdev_io);
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return;
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}
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assert(len <= SPDK_BDEV_LARGE_BUF_MAX_SIZE);
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ch = spdk_io_channel_get_ctx(bdev_io->ch->mgmt_channel);
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bdev_io->buf_len = len;
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bdev_io->get_buf_cb = cb;
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if (len <= SPDK_BDEV_SMALL_BUF_MAX_SIZE) {
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pool = g_bdev_mgr.buf_small_pool;
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stailq = &ch->need_buf_small;
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} else {
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pool = g_bdev_mgr.buf_large_pool;
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stailq = &ch->need_buf_large;
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}
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buf = spdk_mempool_get(pool);
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if (!buf) {
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STAILQ_INSERT_TAIL(stailq, bdev_io, buf_link);
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} else {
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spdk_bdev_io_set_buf(bdev_io, buf);
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}
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}
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static int
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spdk_bdev_module_get_max_ctx_size(void)
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{
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struct spdk_bdev_module *bdev_module;
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int max_bdev_module_size = 0;
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TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, tailq) {
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if (bdev_module->get_ctx_size && bdev_module->get_ctx_size() > max_bdev_module_size) {
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max_bdev_module_size = bdev_module->get_ctx_size();
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}
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}
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return max_bdev_module_size;
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}
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void
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spdk_bdev_config_text(FILE *fp)
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{
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struct spdk_bdev_module *bdev_module;
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TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, tailq) {
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if (bdev_module->config_text) {
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bdev_module->config_text(fp);
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}
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}
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}
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void
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spdk_bdev_subsystem_config_json(struct spdk_json_write_ctx *w)
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{
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struct spdk_bdev_module *bdev_module;
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struct spdk_bdev *bdev;
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assert(w != NULL);
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spdk_json_write_array_begin(w);
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TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, tailq) {
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if (bdev_module->config_json) {
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bdev_module->config_json(w);
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}
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}
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TAILQ_FOREACH(bdev, &g_bdev_mgr.bdevs, link) {
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spdk_bdev_config_json(bdev, w);
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}
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spdk_json_write_array_end(w);
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}
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|
|
static int
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spdk_bdev_mgmt_channel_create(void *io_device, void *ctx_buf)
|
|
{
|
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struct spdk_bdev_mgmt_channel *ch = ctx_buf;
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STAILQ_INIT(&ch->need_buf_small);
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STAILQ_INIT(&ch->need_buf_large);
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STAILQ_INIT(&ch->per_thread_cache);
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ch->per_thread_cache_count = 0;
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TAILQ_INIT(&ch->module_channels);
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return 0;
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}
|
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|
|
static void
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spdk_bdev_mgmt_channel_free_resources(struct spdk_bdev_mgmt_channel *ch)
|
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{
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struct spdk_bdev_io *bdev_io;
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if (!STAILQ_EMPTY(&ch->need_buf_small) || !STAILQ_EMPTY(&ch->need_buf_large)) {
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SPDK_ERRLOG("Pending I/O list wasn't empty on channel free\n");
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}
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while (!STAILQ_EMPTY(&ch->per_thread_cache)) {
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bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
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STAILQ_REMOVE_HEAD(&ch->per_thread_cache, buf_link);
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ch->per_thread_cache_count--;
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spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
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}
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|
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assert(ch->per_thread_cache_count == 0);
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}
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|
|
|
static void
|
|
spdk_bdev_mgmt_channel_destroy(void *io_device, void *ctx_buf)
|
|
{
|
|
struct spdk_bdev_mgmt_channel *ch = ctx_buf;
|
|
|
|
spdk_bdev_mgmt_channel_free_resources(ch);
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_init_complete(int rc)
|
|
{
|
|
spdk_bdev_init_cb cb_fn = g_init_cb_fn;
|
|
void *cb_arg = g_init_cb_arg;
|
|
|
|
g_bdev_mgr.init_complete = true;
|
|
g_init_cb_fn = NULL;
|
|
g_init_cb_arg = NULL;
|
|
|
|
cb_fn(cb_arg, rc);
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_module_action_complete(void)
|
|
{
|
|
struct spdk_bdev_module *m;
|
|
|
|
/*
|
|
* Don't finish bdev subsystem initialization if
|
|
* module pre-initialization is still in progress, or
|
|
* the subsystem been already initialized.
|
|
*/
|
|
if (!g_bdev_mgr.module_init_complete || g_bdev_mgr.init_complete) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Check all bdev modules for inits/examinations in progress. If any
|
|
* exist, return immediately since we cannot finish bdev subsystem
|
|
* initialization until all are completed.
|
|
*/
|
|
TAILQ_FOREACH(m, &g_bdev_mgr.bdev_modules, tailq) {
|
|
if (m->action_in_progress > 0) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Modules already finished initialization - now that all
|
|
* the bdev modules have finished their asynchronous I/O
|
|
* processing, the entire bdev layer can be marked as complete.
|
|
*/
|
|
spdk_bdev_init_complete(0);
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_module_action_done(struct spdk_bdev_module *module)
|
|
{
|
|
assert(module->action_in_progress > 0);
|
|
module->action_in_progress--;
|
|
spdk_bdev_module_action_complete();
|
|
}
|
|
|
|
void
|
|
spdk_bdev_module_init_done(struct spdk_bdev_module *module)
|
|
{
|
|
spdk_bdev_module_action_done(module);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_module_examine_done(struct spdk_bdev_module *module)
|
|
{
|
|
spdk_bdev_module_action_done(module);
|
|
}
|
|
|
|
static int
|
|
spdk_bdev_modules_init(void)
|
|
{
|
|
struct spdk_bdev_module *module;
|
|
int rc = 0;
|
|
|
|
TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, tailq) {
|
|
rc = module->module_init();
|
|
if (rc != 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
g_bdev_mgr.module_init_complete = true;
|
|
return rc;
|
|
}
|
|
void
|
|
spdk_bdev_initialize(spdk_bdev_init_cb cb_fn, void *cb_arg)
|
|
{
|
|
int cache_size;
|
|
int rc = 0;
|
|
char mempool_name[32];
|
|
|
|
assert(cb_fn != NULL);
|
|
|
|
g_init_cb_fn = cb_fn;
|
|
g_init_cb_arg = cb_arg;
|
|
|
|
snprintf(mempool_name, sizeof(mempool_name), "bdev_io_%d", getpid());
|
|
|
|
g_bdev_mgr.bdev_io_pool = spdk_mempool_create(mempool_name,
|
|
SPDK_BDEV_IO_POOL_SIZE,
|
|
sizeof(struct spdk_bdev_io) +
|
|
spdk_bdev_module_get_max_ctx_size(),
|
|
0,
|
|
SPDK_ENV_SOCKET_ID_ANY);
|
|
|
|
if (g_bdev_mgr.bdev_io_pool == NULL) {
|
|
SPDK_ERRLOG("could not allocate spdk_bdev_io pool\n");
|
|
spdk_bdev_init_complete(-1);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Ensure no more than half of the total buffers end up local caches, by
|
|
* using spdk_env_get_core_count() to determine how many local caches we need
|
|
* to account for.
|
|
*/
|
|
cache_size = BUF_SMALL_POOL_SIZE / (2 * spdk_env_get_core_count());
|
|
snprintf(mempool_name, sizeof(mempool_name), "buf_small_pool_%d", getpid());
|
|
|
|
g_bdev_mgr.buf_small_pool = spdk_mempool_create(mempool_name,
|
|
BUF_SMALL_POOL_SIZE,
|
|
SPDK_BDEV_SMALL_BUF_MAX_SIZE + 512,
|
|
cache_size,
|
|
SPDK_ENV_SOCKET_ID_ANY);
|
|
if (!g_bdev_mgr.buf_small_pool) {
|
|
SPDK_ERRLOG("create rbuf small pool failed\n");
|
|
spdk_bdev_init_complete(-1);
|
|
return;
|
|
}
|
|
|
|
cache_size = BUF_LARGE_POOL_SIZE / (2 * spdk_env_get_core_count());
|
|
snprintf(mempool_name, sizeof(mempool_name), "buf_large_pool_%d", getpid());
|
|
|
|
g_bdev_mgr.buf_large_pool = spdk_mempool_create(mempool_name,
|
|
BUF_LARGE_POOL_SIZE,
|
|
SPDK_BDEV_LARGE_BUF_MAX_SIZE + 512,
|
|
cache_size,
|
|
SPDK_ENV_SOCKET_ID_ANY);
|
|
if (!g_bdev_mgr.buf_large_pool) {
|
|
SPDK_ERRLOG("create rbuf large pool failed\n");
|
|
spdk_bdev_init_complete(-1);
|
|
return;
|
|
}
|
|
|
|
g_bdev_mgr.zero_buffer = spdk_dma_zmalloc(ZERO_BUFFER_SIZE, ZERO_BUFFER_SIZE,
|
|
NULL);
|
|
if (!g_bdev_mgr.zero_buffer) {
|
|
SPDK_ERRLOG("create bdev zero buffer failed\n");
|
|
spdk_bdev_init_complete(-1);
|
|
return;
|
|
}
|
|
|
|
#ifdef SPDK_CONFIG_VTUNE
|
|
g_bdev_mgr.domain = __itt_domain_create("spdk_bdev");
|
|
#endif
|
|
|
|
spdk_io_device_register(&g_bdev_mgr, spdk_bdev_mgmt_channel_create,
|
|
spdk_bdev_mgmt_channel_destroy,
|
|
sizeof(struct spdk_bdev_mgmt_channel));
|
|
|
|
rc = spdk_bdev_modules_init();
|
|
if (rc != 0) {
|
|
SPDK_ERRLOG("bdev modules init failed\n");
|
|
spdk_bdev_init_complete(-1);
|
|
return;
|
|
}
|
|
|
|
spdk_bdev_module_action_complete();
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_module_finish_cb(void *io_device)
|
|
{
|
|
spdk_bdev_fini_cb cb_fn = g_fini_cb_fn;
|
|
|
|
cb_fn(g_fini_cb_arg);
|
|
g_fini_cb_fn = NULL;
|
|
g_fini_cb_arg = NULL;
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_module_finish_complete(struct spdk_io_channel_iter *i, int status)
|
|
{
|
|
if (spdk_mempool_count(g_bdev_mgr.bdev_io_pool) != SPDK_BDEV_IO_POOL_SIZE) {
|
|
SPDK_ERRLOG("bdev IO pool count is %zu but should be %u\n",
|
|
spdk_mempool_count(g_bdev_mgr.bdev_io_pool),
|
|
SPDK_BDEV_IO_POOL_SIZE);
|
|
}
|
|
|
|
if (spdk_mempool_count(g_bdev_mgr.buf_small_pool) != BUF_SMALL_POOL_SIZE) {
|
|
SPDK_ERRLOG("Small buffer pool count is %zu but should be %u\n",
|
|
spdk_mempool_count(g_bdev_mgr.buf_small_pool),
|
|
BUF_SMALL_POOL_SIZE);
|
|
assert(false);
|
|
}
|
|
|
|
if (spdk_mempool_count(g_bdev_mgr.buf_large_pool) != BUF_LARGE_POOL_SIZE) {
|
|
SPDK_ERRLOG("Large buffer pool count is %zu but should be %u\n",
|
|
spdk_mempool_count(g_bdev_mgr.buf_large_pool),
|
|
BUF_LARGE_POOL_SIZE);
|
|
assert(false);
|
|
}
|
|
|
|
spdk_mempool_free(g_bdev_mgr.bdev_io_pool);
|
|
spdk_mempool_free(g_bdev_mgr.buf_small_pool);
|
|
spdk_mempool_free(g_bdev_mgr.buf_large_pool);
|
|
spdk_dma_free(g_bdev_mgr.zero_buffer);
|
|
|
|
spdk_io_device_unregister(&g_bdev_mgr, spdk_bdev_module_finish_cb);
|
|
}
|
|
|
|
static void
|
|
mgmt_channel_free_resources(struct spdk_io_channel_iter *i)
|
|
{
|
|
struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
|
|
struct spdk_bdev_mgmt_channel *ch = spdk_io_channel_get_ctx(_ch);
|
|
|
|
spdk_bdev_mgmt_channel_free_resources(ch);
|
|
spdk_for_each_channel_continue(i, 0);
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_module_finish_iter(void *arg)
|
|
{
|
|
/* Notice that this variable is static. It is saved between calls to
|
|
* this function. */
|
|
static struct spdk_bdev_module *resume_bdev_module = NULL;
|
|
struct spdk_bdev_module *bdev_module;
|
|
|
|
/* Start iterating from the last touched module */
|
|
if (!resume_bdev_module) {
|
|
bdev_module = TAILQ_FIRST(&g_bdev_mgr.bdev_modules);
|
|
} else {
|
|
bdev_module = TAILQ_NEXT(resume_bdev_module, tailq);
|
|
}
|
|
|
|
while (bdev_module) {
|
|
if (bdev_module->async_fini) {
|
|
/* Save our place so we can resume later. We must
|
|
* save the variable here, before calling module_fini()
|
|
* below, because in some cases the module may immediately
|
|
* call spdk_bdev_module_finish_done() and re-enter
|
|
* this function to continue iterating. */
|
|
resume_bdev_module = bdev_module;
|
|
}
|
|
|
|
if (bdev_module->module_fini) {
|
|
bdev_module->module_fini();
|
|
}
|
|
|
|
if (bdev_module->async_fini) {
|
|
return;
|
|
}
|
|
|
|
bdev_module = TAILQ_NEXT(bdev_module, tailq);
|
|
}
|
|
|
|
resume_bdev_module = NULL;
|
|
spdk_for_each_channel(&g_bdev_mgr, mgmt_channel_free_resources, NULL,
|
|
spdk_bdev_module_finish_complete);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_module_finish_done(void)
|
|
{
|
|
if (spdk_get_thread() != g_fini_thread) {
|
|
spdk_thread_send_msg(g_fini_thread, spdk_bdev_module_finish_iter, NULL);
|
|
} else {
|
|
spdk_bdev_module_finish_iter(NULL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_finish_unregister_bdevs_iter(void *cb_arg, int bdeverrno)
|
|
{
|
|
struct spdk_bdev *bdev = cb_arg;
|
|
|
|
if (bdeverrno && bdev) {
|
|
SPDK_WARNLOG("Unable to unregister bdev '%s' during spdk_bdev_finish()\n",
|
|
bdev->name);
|
|
|
|
/*
|
|
* Since the call to spdk_bdev_unregister() failed, we have no way to free this
|
|
* bdev; try to continue by manually removing this bdev from the list and continue
|
|
* with the next bdev in the list.
|
|
*/
|
|
TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, link);
|
|
}
|
|
|
|
if (TAILQ_EMPTY(&g_bdev_mgr.bdevs)) {
|
|
SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Done unregistering bdevs\n");
|
|
/*
|
|
* Bdev module finish need to be deffered as we might be in the middle of some context
|
|
* (like bdev part free) that will use this bdev (or private bdev driver ctx data)
|
|
* after returning.
|
|
*/
|
|
spdk_thread_send_msg(spdk_get_thread(), spdk_bdev_module_finish_iter, NULL);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Unregister the first bdev in the list.
|
|
*
|
|
* spdk_bdev_unregister() will handle the case where the bdev has open descriptors by
|
|
* calling the remove_cb of the descriptors first.
|
|
*
|
|
* Once this bdev and all of its open descriptors have been cleaned up, this function
|
|
* will be called again via the unregister completion callback to continue the cleanup
|
|
* process with the next bdev.
|
|
*/
|
|
bdev = TAILQ_FIRST(&g_bdev_mgr.bdevs);
|
|
SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Unregistering bdev '%s'\n", bdev->name);
|
|
spdk_bdev_unregister(bdev, _spdk_bdev_finish_unregister_bdevs_iter, bdev);
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_finish_unregister_bdevs(void)
|
|
{
|
|
_spdk_bdev_finish_unregister_bdevs_iter(NULL, 0);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_finish(spdk_bdev_fini_cb cb_fn, void *cb_arg)
|
|
{
|
|
assert(cb_fn != NULL);
|
|
|
|
g_fini_thread = spdk_get_thread();
|
|
|
|
g_fini_cb_fn = cb_fn;
|
|
g_fini_cb_arg = cb_arg;
|
|
|
|
_spdk_bdev_finish_unregister_bdevs();
|
|
}
|
|
|
|
static struct spdk_bdev_io *
|
|
spdk_bdev_get_io(struct spdk_io_channel *_ch)
|
|
{
|
|
struct spdk_bdev_mgmt_channel *ch = spdk_io_channel_get_ctx(_ch);
|
|
struct spdk_bdev_io *bdev_io;
|
|
|
|
if (ch->per_thread_cache_count > 0) {
|
|
bdev_io = STAILQ_FIRST(&ch->per_thread_cache);
|
|
STAILQ_REMOVE_HEAD(&ch->per_thread_cache, buf_link);
|
|
ch->per_thread_cache_count--;
|
|
} else {
|
|
bdev_io = spdk_mempool_get(g_bdev_mgr.bdev_io_pool);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("Unable to get spdk_bdev_io\n");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
bdev_io->mgmt_ch = ch;
|
|
|
|
return bdev_io;
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_put_io(struct spdk_bdev_io *bdev_io)
|
|
{
|
|
struct spdk_bdev_mgmt_channel *ch = bdev_io->mgmt_ch;
|
|
|
|
if (bdev_io->buf != NULL) {
|
|
spdk_bdev_io_put_buf(bdev_io);
|
|
}
|
|
|
|
if (ch->per_thread_cache_count < SPDK_BDEV_IO_CACHE_SIZE) {
|
|
ch->per_thread_cache_count++;
|
|
STAILQ_INSERT_TAIL(&ch->per_thread_cache, bdev_io, buf_link);
|
|
} else {
|
|
spdk_mempool_put(g_bdev_mgr.bdev_io_pool, (void *)bdev_io);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_qos_io_submit(void *ctx)
|
|
{
|
|
struct spdk_bdev_channel *ch = ctx;
|
|
struct spdk_bdev_io *bdev_io = NULL;
|
|
struct spdk_bdev *bdev = ch->bdev;
|
|
struct spdk_bdev_module_channel *shared_ch = ch->module_ch;
|
|
|
|
while (!TAILQ_EMPTY(&ch->qos_io)) {
|
|
if (ch->io_submitted_this_timeslice < ch->qos_max_ios_per_timeslice) {
|
|
bdev_io = TAILQ_FIRST(&ch->qos_io);
|
|
TAILQ_REMOVE(&ch->qos_io, bdev_io, link);
|
|
ch->io_submitted_this_timeslice++;
|
|
ch->io_outstanding++;
|
|
shared_ch->io_outstanding++;
|
|
bdev->fn_table->submit_request(ch->channel, bdev_io);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_io_submit(void *ctx)
|
|
{
|
|
struct spdk_bdev_io *bdev_io = ctx;
|
|
struct spdk_bdev *bdev = bdev_io->bdev;
|
|
struct spdk_bdev_channel *bdev_ch = bdev_io->ch;
|
|
struct spdk_io_channel *ch = bdev_ch->channel;
|
|
struct spdk_bdev_module_channel *shared_ch = bdev_ch->module_ch;
|
|
|
|
bdev_io->submit_tsc = spdk_get_ticks();
|
|
bdev_ch->io_outstanding++;
|
|
shared_ch->io_outstanding++;
|
|
bdev_io->in_submit_request = true;
|
|
if (spdk_likely(bdev_ch->flags == 0)) {
|
|
if (spdk_likely(TAILQ_EMPTY(&shared_ch->nomem_io))) {
|
|
bdev->fn_table->submit_request(ch, bdev_io);
|
|
} else {
|
|
bdev_ch->io_outstanding--;
|
|
shared_ch->io_outstanding--;
|
|
TAILQ_INSERT_TAIL(&shared_ch->nomem_io, bdev_io, link);
|
|
}
|
|
} else if (bdev_ch->flags & BDEV_CH_RESET_IN_PROGRESS) {
|
|
spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
|
|
} else if (bdev_ch->flags & BDEV_CH_QOS_ENABLED) {
|
|
bdev_ch->io_outstanding--;
|
|
shared_ch->io_outstanding--;
|
|
TAILQ_INSERT_TAIL(&bdev_ch->qos_io, bdev_io, link);
|
|
_spdk_bdev_qos_io_submit(bdev_ch);
|
|
} else {
|
|
SPDK_ERRLOG("unknown bdev_ch flag %x found\n", bdev_ch->flags);
|
|
spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
|
|
}
|
|
bdev_io->in_submit_request = false;
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_io_submit(struct spdk_bdev_io *bdev_io)
|
|
{
|
|
struct spdk_bdev *bdev = bdev_io->bdev;
|
|
|
|
assert(bdev_io->status == SPDK_BDEV_IO_STATUS_PENDING);
|
|
|
|
/* QoS channel and thread have been properly configured */
|
|
if (bdev->ios_per_sec > 0 && bdev->qos_channel && bdev->qos_thread) {
|
|
bdev_io->io_submit_ch = bdev_io->ch;
|
|
bdev_io->ch = bdev->qos_channel;
|
|
spdk_thread_send_msg(bdev->qos_thread, _spdk_bdev_io_submit, bdev_io);
|
|
} else {
|
|
_spdk_bdev_io_submit(bdev_io);
|
|
}
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_io_submit_reset(struct spdk_bdev_io *bdev_io)
|
|
{
|
|
struct spdk_bdev *bdev = bdev_io->bdev;
|
|
struct spdk_bdev_channel *bdev_ch = bdev_io->ch;
|
|
struct spdk_io_channel *ch = bdev_ch->channel;
|
|
|
|
assert(bdev_io->status == SPDK_BDEV_IO_STATUS_PENDING);
|
|
|
|
bdev_io->in_submit_request = true;
|
|
bdev->fn_table->submit_request(ch, bdev_io);
|
|
bdev_io->in_submit_request = false;
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_io_init(struct spdk_bdev_io *bdev_io,
|
|
struct spdk_bdev *bdev, void *cb_arg,
|
|
spdk_bdev_io_completion_cb cb)
|
|
{
|
|
bdev_io->bdev = bdev;
|
|
bdev_io->caller_ctx = cb_arg;
|
|
bdev_io->cb = cb;
|
|
bdev_io->status = SPDK_BDEV_IO_STATUS_PENDING;
|
|
bdev_io->in_submit_request = false;
|
|
bdev_io->buf = NULL;
|
|
bdev_io->io_submit_ch = NULL;
|
|
}
|
|
|
|
bool
|
|
spdk_bdev_io_type_supported(struct spdk_bdev *bdev, enum spdk_bdev_io_type io_type)
|
|
{
|
|
return bdev->fn_table->io_type_supported(bdev->ctxt, io_type);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_dump_info_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
|
|
{
|
|
if (bdev->fn_table->dump_info_json) {
|
|
return bdev->fn_table->dump_info_json(bdev->ctxt, w);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
spdk_bdev_config_json(struct spdk_bdev *bdev, struct spdk_json_write_ctx *w)
|
|
{
|
|
assert(bdev != NULL);
|
|
assert(w != NULL);
|
|
|
|
if (bdev->fn_table->write_config_json) {
|
|
bdev->fn_table->write_config_json(bdev, w);
|
|
} else {
|
|
spdk_json_write_object_begin(w);
|
|
spdk_json_write_named_string(w, "name", bdev->name);
|
|
spdk_json_write_object_end(w);
|
|
}
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_qos_get_max_ios_per_timeslice(struct spdk_bdev_channel *qos_ch)
|
|
{
|
|
uint64_t qos_max_ios_per_timeslice = 0;
|
|
struct spdk_bdev *bdev = qos_ch->bdev;
|
|
|
|
qos_max_ios_per_timeslice = bdev->ios_per_sec * SPDK_BDEV_QOS_TIMESLICE_IN_USEC /
|
|
SPDK_BDEV_SEC_TO_USEC;
|
|
qos_ch->qos_max_ios_per_timeslice = spdk_max(qos_max_ios_per_timeslice,
|
|
SPDK_BDEV_QOS_MIN_IO_PER_TIMESLICE);
|
|
}
|
|
|
|
static int
|
|
spdk_bdev_channel_poll_qos(void *arg)
|
|
{
|
|
struct spdk_bdev_channel *ch = arg;
|
|
|
|
/* Reset for next round of rate limiting */
|
|
ch->io_submitted_this_timeslice = 0;
|
|
spdk_bdev_qos_get_max_ios_per_timeslice(ch);
|
|
|
|
_spdk_bdev_qos_io_submit(ch);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
_spdk_bdev_channel_create(struct spdk_bdev_channel *ch, void *io_device)
|
|
{
|
|
struct spdk_bdev *bdev = __bdev_from_io_dev(io_device);
|
|
struct spdk_bdev_mgmt_channel *mgmt_ch;
|
|
struct spdk_bdev_module_channel *shared_ch;
|
|
|
|
ch->bdev = bdev;
|
|
ch->channel = bdev->fn_table->get_io_channel(bdev->ctxt);
|
|
if (!ch->channel) {
|
|
return -1;
|
|
}
|
|
|
|
ch->mgmt_channel = spdk_get_io_channel(&g_bdev_mgr);
|
|
if (!ch->mgmt_channel) {
|
|
return -1;
|
|
}
|
|
|
|
mgmt_ch = spdk_io_channel_get_ctx(ch->mgmt_channel);
|
|
TAILQ_FOREACH(shared_ch, &mgmt_ch->module_channels, link) {
|
|
if (shared_ch->module_ch == ch->channel) {
|
|
shared_ch->ref++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (shared_ch == NULL) {
|
|
shared_ch = calloc(1, sizeof(*shared_ch));
|
|
if (!shared_ch) {
|
|
return -1;
|
|
}
|
|
|
|
shared_ch->io_outstanding = 0;
|
|
TAILQ_INIT(&shared_ch->nomem_io);
|
|
shared_ch->nomem_threshold = 0;
|
|
shared_ch->module_ch = ch->channel;
|
|
shared_ch->ref = 1;
|
|
TAILQ_INSERT_TAIL(&mgmt_ch->module_channels, shared_ch, link);
|
|
}
|
|
|
|
memset(&ch->stat, 0, sizeof(ch->stat));
|
|
ch->io_outstanding = 0;
|
|
TAILQ_INIT(&ch->queued_resets);
|
|
TAILQ_INIT(&ch->qos_io);
|
|
ch->qos_max_ios_per_timeslice = 0;
|
|
ch->io_submitted_this_timeslice = 0;
|
|
ch->qos_poller = NULL;
|
|
ch->flags = 0;
|
|
ch->module_ch = shared_ch;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_channel_destroy_resource(struct spdk_bdev_channel *ch)
|
|
{
|
|
struct spdk_bdev_mgmt_channel *mgmt_channel;
|
|
struct spdk_bdev_module_channel *shared_ch = NULL;
|
|
|
|
if (!ch) {
|
|
return;
|
|
}
|
|
|
|
if (ch->channel) {
|
|
spdk_put_io_channel(ch->channel);
|
|
}
|
|
|
|
if (ch->mgmt_channel) {
|
|
shared_ch = ch->module_ch;
|
|
if (shared_ch) {
|
|
assert(ch->io_outstanding == 0);
|
|
assert(shared_ch->ref > 0);
|
|
shared_ch->ref--;
|
|
if (shared_ch->ref == 0) {
|
|
mgmt_channel = spdk_io_channel_get_ctx(ch->mgmt_channel);
|
|
assert(shared_ch->io_outstanding == 0);
|
|
TAILQ_REMOVE(&mgmt_channel->module_channels, shared_ch, link);
|
|
free(shared_ch);
|
|
}
|
|
}
|
|
spdk_put_io_channel(ch->mgmt_channel);
|
|
}
|
|
}
|
|
|
|
/* Caller must hold bdev->mutex. */
|
|
static int
|
|
spdk_bdev_qos_channel_create(struct spdk_bdev *bdev)
|
|
{
|
|
assert(bdev->qos_channel == NULL);
|
|
assert(bdev->qos_thread == NULL);
|
|
|
|
bdev->qos_channel = calloc(1, sizeof(struct spdk_bdev_channel));
|
|
if (!bdev->qos_channel) {
|
|
return -1;
|
|
}
|
|
|
|
bdev->qos_thread = spdk_get_thread();
|
|
if (!bdev->qos_thread) {
|
|
free(bdev->qos_channel);
|
|
bdev->qos_channel = NULL;
|
|
return -1;
|
|
}
|
|
|
|
if (_spdk_bdev_channel_create(bdev->qos_channel, __bdev_to_io_dev(bdev)) != 0) {
|
|
free(bdev->qos_channel);
|
|
bdev->qos_channel = NULL;
|
|
bdev->qos_thread = NULL;
|
|
return -1;
|
|
}
|
|
|
|
bdev->qos_channel->flags |= BDEV_CH_QOS_ENABLED;
|
|
spdk_bdev_qos_get_max_ios_per_timeslice(bdev->qos_channel);
|
|
bdev->qos_channel->qos_poller = spdk_poller_register(
|
|
spdk_bdev_channel_poll_qos,
|
|
bdev->qos_channel,
|
|
SPDK_BDEV_QOS_TIMESLICE_IN_USEC);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
spdk_bdev_channel_create(void *io_device, void *ctx_buf)
|
|
{
|
|
struct spdk_bdev *bdev = __bdev_from_io_dev(io_device);
|
|
struct spdk_bdev_channel *ch = ctx_buf;
|
|
|
|
if (_spdk_bdev_channel_create(ch, io_device) != 0) {
|
|
_spdk_bdev_channel_destroy_resource(ch);
|
|
return -1;
|
|
}
|
|
|
|
#ifdef SPDK_CONFIG_VTUNE
|
|
{
|
|
char *name;
|
|
__itt_init_ittlib(NULL, 0);
|
|
name = spdk_sprintf_alloc("spdk_bdev_%s_%p", ch->bdev->name, ch);
|
|
if (!name) {
|
|
_spdk_bdev_channel_destroy_resource(ch);
|
|
return -1;
|
|
}
|
|
ch->handle = __itt_string_handle_create(name);
|
|
free(name);
|
|
ch->start_tsc = spdk_get_ticks();
|
|
ch->interval_tsc = spdk_get_ticks_hz() / 100;
|
|
}
|
|
#endif
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
|
|
/* Rate limiting on this bdev enabled */
|
|
if (bdev->ios_per_sec > 0 && bdev->qos_channel == NULL) {
|
|
if (spdk_bdev_qos_channel_create(bdev) != 0) {
|
|
_spdk_bdev_channel_destroy_resource(ch);
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
bdev->channel_count++;
|
|
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Abort I/O that are waiting on a data buffer. These types of I/O are
|
|
* linked using the spdk_bdev_io buf_link TAILQ_ENTRY.
|
|
*/
|
|
static void
|
|
_spdk_bdev_abort_buf_io(bdev_io_stailq_t *queue, struct spdk_bdev_channel *ch)
|
|
{
|
|
bdev_io_stailq_t tmp;
|
|
struct spdk_bdev_io *bdev_io;
|
|
|
|
STAILQ_INIT(&tmp);
|
|
|
|
while (!STAILQ_EMPTY(queue)) {
|
|
bdev_io = STAILQ_FIRST(queue);
|
|
STAILQ_REMOVE_HEAD(queue, buf_link);
|
|
if (bdev_io->ch == ch) {
|
|
spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
|
|
} else {
|
|
STAILQ_INSERT_TAIL(&tmp, bdev_io, buf_link);
|
|
}
|
|
}
|
|
|
|
STAILQ_SWAP(&tmp, queue, spdk_bdev_io);
|
|
}
|
|
|
|
/*
|
|
* Abort I/O that are queued waiting for submission. These types of I/O are
|
|
* linked using the spdk_bdev_io link TAILQ_ENTRY.
|
|
*/
|
|
static void
|
|
_spdk_bdev_abort_queued_io(bdev_io_tailq_t *queue, struct spdk_bdev_channel *ch)
|
|
{
|
|
struct spdk_bdev_io *bdev_io, *tmp;
|
|
|
|
TAILQ_FOREACH_SAFE(bdev_io, queue, link, tmp) {
|
|
if (bdev_io->ch == ch) {
|
|
TAILQ_REMOVE(queue, bdev_io, link);
|
|
/*
|
|
* spdk_bdev_io_complete() assumes that the completed I/O had
|
|
* been submitted to the bdev module. Since in this case it
|
|
* hadn't, bump io_outstanding to account for the decrement
|
|
* that spdk_bdev_io_complete() will do.
|
|
*/
|
|
if (bdev_io->type != SPDK_BDEV_IO_TYPE_RESET) {
|
|
ch->io_outstanding++;
|
|
ch->module_ch->io_outstanding++;
|
|
}
|
|
spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_channel_destroy(struct spdk_bdev_channel *ch)
|
|
{
|
|
struct spdk_bdev_mgmt_channel *mgmt_channel;
|
|
struct spdk_bdev_module_channel *shared_ch = ch->module_ch;
|
|
|
|
mgmt_channel = spdk_io_channel_get_ctx(ch->mgmt_channel);
|
|
|
|
_spdk_bdev_abort_queued_io(&ch->queued_resets, ch);
|
|
_spdk_bdev_abort_queued_io(&ch->qos_io, ch);
|
|
_spdk_bdev_abort_queued_io(&shared_ch->nomem_io, ch);
|
|
_spdk_bdev_abort_buf_io(&mgmt_channel->need_buf_small, ch);
|
|
_spdk_bdev_abort_buf_io(&mgmt_channel->need_buf_large, ch);
|
|
|
|
_spdk_bdev_channel_destroy_resource(ch);
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_qos_channel_destroy(void *ctx)
|
|
{
|
|
struct spdk_bdev_channel *qos_channel = ctx;
|
|
|
|
_spdk_bdev_channel_destroy(qos_channel);
|
|
|
|
spdk_poller_unregister(&qos_channel->qos_poller);
|
|
free(qos_channel);
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_channel_destroy(void *io_device, void *ctx_buf)
|
|
{
|
|
struct spdk_bdev_channel *ch = ctx_buf;
|
|
struct spdk_bdev *bdev = ch->bdev;
|
|
|
|
_spdk_bdev_channel_destroy(ch);
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
bdev->channel_count--;
|
|
if (bdev->channel_count == 0 && bdev->qos_channel != NULL) {
|
|
/* All I/O channels for this bdev have been destroyed - destroy the QoS channel. */
|
|
spdk_thread_send_msg(bdev->qos_thread, spdk_bdev_qos_channel_destroy,
|
|
bdev->qos_channel);
|
|
|
|
/*
|
|
* Set qos_channel to NULL within the critical section so that
|
|
* if another channel is created, it will see qos_channel == NULL and
|
|
* re-create the QoS channel even if the asynchronous qos_channel_destroy
|
|
* isn't finished yet.
|
|
*/
|
|
bdev->qos_channel = NULL;
|
|
bdev->qos_thread = NULL;
|
|
}
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_alias_add(struct spdk_bdev *bdev, const char *alias)
|
|
{
|
|
struct spdk_bdev_alias *tmp;
|
|
|
|
if (alias == NULL) {
|
|
SPDK_ERRLOG("Empty alias passed\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (spdk_bdev_get_by_name(alias)) {
|
|
SPDK_ERRLOG("Bdev name/alias: %s already exists\n", alias);
|
|
return -EEXIST;
|
|
}
|
|
|
|
tmp = calloc(1, sizeof(*tmp));
|
|
if (tmp == NULL) {
|
|
SPDK_ERRLOG("Unable to allocate alias\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
tmp->alias = strdup(alias);
|
|
if (tmp->alias == NULL) {
|
|
free(tmp);
|
|
SPDK_ERRLOG("Unable to allocate alias\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
TAILQ_INSERT_TAIL(&bdev->aliases, tmp, tailq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_alias_del(struct spdk_bdev *bdev, const char *alias)
|
|
{
|
|
struct spdk_bdev_alias *tmp;
|
|
|
|
TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
|
|
if (strcmp(alias, tmp->alias) == 0) {
|
|
TAILQ_REMOVE(&bdev->aliases, tmp, tailq);
|
|
free(tmp->alias);
|
|
free(tmp);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
SPDK_INFOLOG(SPDK_LOG_BDEV, "Alias %s does not exists\n", alias);
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
struct spdk_io_channel *
|
|
spdk_bdev_get_io_channel(struct spdk_bdev_desc *desc)
|
|
{
|
|
return spdk_get_io_channel(__bdev_to_io_dev(desc->bdev));
|
|
}
|
|
|
|
const char *
|
|
spdk_bdev_get_name(const struct spdk_bdev *bdev)
|
|
{
|
|
return bdev->name;
|
|
}
|
|
|
|
const char *
|
|
spdk_bdev_get_product_name(const struct spdk_bdev *bdev)
|
|
{
|
|
return bdev->product_name;
|
|
}
|
|
|
|
const struct spdk_bdev_aliases_list *
|
|
spdk_bdev_get_aliases(const struct spdk_bdev *bdev)
|
|
{
|
|
return &bdev->aliases;
|
|
}
|
|
|
|
uint32_t
|
|
spdk_bdev_get_block_size(const struct spdk_bdev *bdev)
|
|
{
|
|
return bdev->blocklen;
|
|
}
|
|
|
|
uint64_t
|
|
spdk_bdev_get_num_blocks(const struct spdk_bdev *bdev)
|
|
{
|
|
return bdev->blockcnt;
|
|
}
|
|
|
|
size_t
|
|
spdk_bdev_get_buf_align(const struct spdk_bdev *bdev)
|
|
{
|
|
/* TODO: push this logic down to the bdev modules */
|
|
if (bdev->need_aligned_buffer) {
|
|
return bdev->blocklen;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
uint32_t
|
|
spdk_bdev_get_optimal_io_boundary(const struct spdk_bdev *bdev)
|
|
{
|
|
return bdev->optimal_io_boundary;
|
|
}
|
|
|
|
bool
|
|
spdk_bdev_has_write_cache(const struct spdk_bdev *bdev)
|
|
{
|
|
return bdev->write_cache;
|
|
}
|
|
|
|
const struct spdk_uuid *
|
|
spdk_bdev_get_uuid(const struct spdk_bdev *bdev)
|
|
{
|
|
return &bdev->uuid;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_notify_blockcnt_change(struct spdk_bdev *bdev, uint64_t size)
|
|
{
|
|
int ret;
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
|
|
/* bdev has open descriptors */
|
|
if (!TAILQ_EMPTY(&bdev->open_descs) &&
|
|
bdev->blockcnt > size) {
|
|
ret = -EBUSY;
|
|
} else {
|
|
bdev->blockcnt = size;
|
|
ret = 0;
|
|
}
|
|
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Convert I/O offset and length from bytes to blocks.
|
|
*
|
|
* Returns zero on success or non-zero if the byte parameters aren't divisible by the block size.
|
|
*/
|
|
static uint64_t
|
|
spdk_bdev_bytes_to_blocks(struct spdk_bdev *bdev, uint64_t offset_bytes, uint64_t *offset_blocks,
|
|
uint64_t num_bytes, uint64_t *num_blocks)
|
|
{
|
|
uint32_t block_size = bdev->blocklen;
|
|
|
|
*offset_blocks = offset_bytes / block_size;
|
|
*num_blocks = num_bytes / block_size;
|
|
|
|
return (offset_bytes % block_size) | (num_bytes % block_size);
|
|
}
|
|
|
|
static bool
|
|
spdk_bdev_io_valid_blocks(struct spdk_bdev *bdev, uint64_t offset_blocks, uint64_t num_blocks)
|
|
{
|
|
/* Return failure if offset_blocks + num_blocks is less than offset_blocks; indicates there
|
|
* has been an overflow and hence the offset has been wrapped around */
|
|
if (offset_blocks + num_blocks < offset_blocks) {
|
|
return false;
|
|
}
|
|
|
|
/* Return failure if offset_blocks + num_blocks exceeds the size of the bdev */
|
|
if (offset_blocks + num_blocks > bdev->blockcnt) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_read(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
void *buf, uint64_t offset, uint64_t nbytes,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
uint64_t offset_blocks, num_blocks;
|
|
|
|
if (spdk_bdev_bytes_to_blocks(desc->bdev, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spdk_bdev_read_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_read_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
void *buf, uint64_t offset_blocks, uint64_t num_blocks,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!spdk_bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("spdk_bdev_io memory allocation failed duing read\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
|
|
bdev_io->u.bdev.iov.iov_base = buf;
|
|
bdev_io->u.bdev.iov.iov_len = num_blocks * bdev->blocklen;
|
|
bdev_io->u.bdev.iovs = &bdev_io->u.bdev.iov;
|
|
bdev_io->u.bdev.iovcnt = 1;
|
|
bdev_io->u.bdev.num_blocks = num_blocks;
|
|
bdev_io->u.bdev.offset_blocks = offset_blocks;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_readv(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
struct iovec *iov, int iovcnt,
|
|
uint64_t offset, uint64_t nbytes,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
uint64_t offset_blocks, num_blocks;
|
|
|
|
if (spdk_bdev_bytes_to_blocks(desc->bdev, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spdk_bdev_readv_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
|
|
}
|
|
|
|
int spdk_bdev_readv_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
struct iovec *iov, int iovcnt,
|
|
uint64_t offset_blocks, uint64_t num_blocks,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!spdk_bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("spdk_bdev_io memory allocation failed duing read\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_READ;
|
|
bdev_io->u.bdev.iovs = iov;
|
|
bdev_io->u.bdev.iovcnt = iovcnt;
|
|
bdev_io->u.bdev.num_blocks = num_blocks;
|
|
bdev_io->u.bdev.offset_blocks = offset_blocks;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_write(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
void *buf, uint64_t offset, uint64_t nbytes,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
uint64_t offset_blocks, num_blocks;
|
|
|
|
if (spdk_bdev_bytes_to_blocks(desc->bdev, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spdk_bdev_write_blocks(desc, ch, buf, offset_blocks, num_blocks, cb, cb_arg);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_write_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
void *buf, uint64_t offset_blocks, uint64_t num_blocks,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!desc->write) {
|
|
return -EBADF;
|
|
}
|
|
|
|
if (!spdk_bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed duing write\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
|
|
bdev_io->u.bdev.iov.iov_base = buf;
|
|
bdev_io->u.bdev.iov.iov_len = num_blocks * bdev->blocklen;
|
|
bdev_io->u.bdev.iovs = &bdev_io->u.bdev.iov;
|
|
bdev_io->u.bdev.iovcnt = 1;
|
|
bdev_io->u.bdev.num_blocks = num_blocks;
|
|
bdev_io->u.bdev.offset_blocks = offset_blocks;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_writev(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
struct iovec *iov, int iovcnt,
|
|
uint64_t offset, uint64_t len,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
uint64_t offset_blocks, num_blocks;
|
|
|
|
if (spdk_bdev_bytes_to_blocks(desc->bdev, offset, &offset_blocks, len, &num_blocks) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spdk_bdev_writev_blocks(desc, ch, iov, iovcnt, offset_blocks, num_blocks, cb, cb_arg);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_writev_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
struct iovec *iov, int iovcnt,
|
|
uint64_t offset_blocks, uint64_t num_blocks,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!desc->write) {
|
|
return -EBADF;
|
|
}
|
|
|
|
if (!spdk_bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed duing writev\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
|
|
bdev_io->u.bdev.iovs = iov;
|
|
bdev_io->u.bdev.iovcnt = iovcnt;
|
|
bdev_io->u.bdev.num_blocks = num_blocks;
|
|
bdev_io->u.bdev.offset_blocks = offset_blocks;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_write_zeroes(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
uint64_t offset, uint64_t len,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
uint64_t offset_blocks, num_blocks;
|
|
|
|
if (spdk_bdev_bytes_to_blocks(desc->bdev, offset, &offset_blocks, len, &num_blocks) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spdk_bdev_write_zeroes_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_write_zeroes_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
uint64_t offset_blocks, uint64_t num_blocks,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
uint64_t len;
|
|
bool split_request = false;
|
|
|
|
if (num_blocks > UINT64_MAX / spdk_bdev_get_block_size(bdev)) {
|
|
SPDK_ERRLOG("length argument out of range in write_zeroes\n");
|
|
return -ERANGE;
|
|
}
|
|
|
|
if (!spdk_bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed duing write_zeroes\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->u.bdev.offset_blocks = offset_blocks;
|
|
|
|
if (spdk_bdev_io_type_supported(bdev, SPDK_BDEV_IO_TYPE_WRITE_ZEROES)) {
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE_ZEROES;
|
|
bdev_io->u.bdev.num_blocks = num_blocks;
|
|
bdev_io->u.bdev.iovs = NULL;
|
|
bdev_io->u.bdev.iovcnt = 0;
|
|
|
|
} else {
|
|
assert(spdk_bdev_get_block_size(bdev) <= ZERO_BUFFER_SIZE);
|
|
|
|
len = spdk_bdev_get_block_size(bdev) * num_blocks;
|
|
|
|
if (len > ZERO_BUFFER_SIZE) {
|
|
split_request = true;
|
|
len = ZERO_BUFFER_SIZE;
|
|
}
|
|
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_WRITE;
|
|
bdev_io->u.bdev.iov.iov_base = g_bdev_mgr.zero_buffer;
|
|
bdev_io->u.bdev.iov.iov_len = len;
|
|
bdev_io->u.bdev.iovs = &bdev_io->u.bdev.iov;
|
|
bdev_io->u.bdev.iovcnt = 1;
|
|
bdev_io->u.bdev.num_blocks = len / spdk_bdev_get_block_size(bdev);
|
|
bdev_io->u.bdev.split_remaining_num_blocks = num_blocks - bdev_io->u.bdev.num_blocks;
|
|
bdev_io->u.bdev.split_current_offset_blocks = offset_blocks + bdev_io->u.bdev.num_blocks;
|
|
}
|
|
|
|
if (split_request) {
|
|
bdev_io->u.bdev.stored_user_cb = cb;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, spdk_bdev_write_zeroes_split);
|
|
} else {
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
}
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_unmap(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
uint64_t offset, uint64_t nbytes,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
uint64_t offset_blocks, num_blocks;
|
|
|
|
if (spdk_bdev_bytes_to_blocks(desc->bdev, offset, &offset_blocks, nbytes, &num_blocks) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spdk_bdev_unmap_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_unmap_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
uint64_t offset_blocks, uint64_t num_blocks,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!desc->write) {
|
|
return -EBADF;
|
|
}
|
|
|
|
if (!spdk_bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (num_blocks == 0) {
|
|
SPDK_ERRLOG("Can't unmap 0 bytes\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed duing unmap\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_UNMAP;
|
|
bdev_io->u.bdev.iov.iov_base = NULL;
|
|
bdev_io->u.bdev.iov.iov_len = 0;
|
|
bdev_io->u.bdev.iovs = &bdev_io->u.bdev.iov;
|
|
bdev_io->u.bdev.iovcnt = 1;
|
|
bdev_io->u.bdev.offset_blocks = offset_blocks;
|
|
bdev_io->u.bdev.num_blocks = num_blocks;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_flush(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
uint64_t offset, uint64_t length,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
uint64_t offset_blocks, num_blocks;
|
|
|
|
if (spdk_bdev_bytes_to_blocks(desc->bdev, offset, &offset_blocks, length, &num_blocks) != 0) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return spdk_bdev_flush_blocks(desc, ch, offset_blocks, num_blocks, cb, cb_arg);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_flush_blocks(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
uint64_t offset_blocks, uint64_t num_blocks,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!desc->write) {
|
|
return -EBADF;
|
|
}
|
|
|
|
if (!spdk_bdev_io_valid_blocks(bdev, offset_blocks, num_blocks)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed duing flush\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_FLUSH;
|
|
bdev_io->u.bdev.iovs = NULL;
|
|
bdev_io->u.bdev.iovcnt = 0;
|
|
bdev_io->u.bdev.offset_blocks = offset_blocks;
|
|
bdev_io->u.bdev.num_blocks = num_blocks;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_reset_dev(struct spdk_io_channel_iter *i, int status)
|
|
{
|
|
struct spdk_bdev_channel *ch = spdk_io_channel_iter_get_ctx(i);
|
|
struct spdk_bdev_io *bdev_io;
|
|
|
|
bdev_io = TAILQ_FIRST(&ch->queued_resets);
|
|
TAILQ_REMOVE(&ch->queued_resets, bdev_io, link);
|
|
spdk_bdev_io_submit_reset(bdev_io);
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_reset_freeze_channel(struct spdk_io_channel_iter *i)
|
|
{
|
|
struct spdk_io_channel *ch;
|
|
struct spdk_bdev_channel *channel;
|
|
struct spdk_bdev_mgmt_channel *mgmt_channel;
|
|
struct spdk_bdev_module_channel *shared_ch;
|
|
|
|
ch = spdk_io_channel_iter_get_channel(i);
|
|
channel = spdk_io_channel_get_ctx(ch);
|
|
mgmt_channel = spdk_io_channel_get_ctx(channel->mgmt_channel);
|
|
shared_ch = channel->module_ch;
|
|
|
|
channel->flags |= BDEV_CH_RESET_IN_PROGRESS;
|
|
|
|
_spdk_bdev_abort_queued_io(&shared_ch->nomem_io, channel);
|
|
_spdk_bdev_abort_queued_io(&channel->qos_io, channel);
|
|
_spdk_bdev_abort_buf_io(&mgmt_channel->need_buf_small, channel);
|
|
_spdk_bdev_abort_buf_io(&mgmt_channel->need_buf_large, channel);
|
|
|
|
spdk_for_each_channel_continue(i, 0);
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_reset_freeze_qos_channel(void *ctx)
|
|
{
|
|
struct spdk_bdev *bdev = ctx;
|
|
struct spdk_bdev_mgmt_channel *mgmt_channel = NULL;
|
|
struct spdk_bdev_channel *qos_channel = bdev->qos_channel;
|
|
struct spdk_bdev_module_channel *shared_ch = NULL;
|
|
|
|
if (qos_channel) {
|
|
shared_ch = qos_channel->module_ch;
|
|
mgmt_channel = spdk_io_channel_get_ctx(qos_channel->mgmt_channel);
|
|
|
|
qos_channel->flags |= BDEV_CH_RESET_IN_PROGRESS;
|
|
|
|
_spdk_bdev_abort_queued_io(&shared_ch->nomem_io, qos_channel);
|
|
_spdk_bdev_abort_queued_io(&qos_channel->qos_io, qos_channel);
|
|
_spdk_bdev_abort_buf_io(&mgmt_channel->need_buf_small, qos_channel);
|
|
_spdk_bdev_abort_buf_io(&mgmt_channel->need_buf_large, qos_channel);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_start_reset(void *ctx)
|
|
{
|
|
struct spdk_bdev_channel *ch = ctx;
|
|
|
|
spdk_for_each_channel(__bdev_to_io_dev(ch->bdev), _spdk_bdev_reset_freeze_channel,
|
|
ch, _spdk_bdev_reset_dev);
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_channel_start_reset(struct spdk_bdev_channel *ch)
|
|
{
|
|
struct spdk_bdev *bdev = ch->bdev;
|
|
|
|
assert(!TAILQ_EMPTY(&ch->queued_resets));
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
if (bdev->reset_in_progress == NULL) {
|
|
bdev->reset_in_progress = TAILQ_FIRST(&ch->queued_resets);
|
|
/*
|
|
* Take a channel reference for the target bdev for the life of this
|
|
* reset. This guards against the channel getting destroyed while
|
|
* spdk_for_each_channel() calls related to this reset IO are in
|
|
* progress. We will release the reference when this reset is
|
|
* completed.
|
|
*/
|
|
bdev->reset_in_progress->u.reset.ch_ref = spdk_get_io_channel(__bdev_to_io_dev(bdev));
|
|
_spdk_bdev_start_reset(ch);
|
|
}
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_reset(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed duing reset\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_RESET;
|
|
bdev_io->u.reset.ch_ref = NULL;
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
TAILQ_INSERT_TAIL(&channel->queued_resets, bdev_io, link);
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
|
|
_spdk_bdev_channel_start_reset(channel);
|
|
|
|
/* Explicitly handle the QoS bdev channel as no IO channel associated */
|
|
if (bdev->qos_thread) {
|
|
spdk_thread_send_msg(bdev->qos_thread,
|
|
_spdk_bdev_reset_freeze_qos_channel, bdev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
spdk_bdev_get_io_stat(struct spdk_bdev *bdev, struct spdk_io_channel *ch,
|
|
struct spdk_bdev_io_stat *stat)
|
|
{
|
|
#ifdef SPDK_CONFIG_VTUNE
|
|
SPDK_ERRLOG("Calling spdk_bdev_get_io_stat is not allowed when VTune integration is enabled.\n");
|
|
memset(stat, 0, sizeof(*stat));
|
|
return;
|
|
#endif
|
|
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
channel->stat.ticks_rate = spdk_get_ticks_hz();
|
|
*stat = channel->stat;
|
|
memset(&channel->stat, 0, sizeof(channel->stat));
|
|
}
|
|
|
|
int
|
|
spdk_bdev_nvme_admin_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!desc->write) {
|
|
return -EBADF;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed during nvme_admin_passthru\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_ADMIN;
|
|
bdev_io->u.nvme_passthru.cmd = *cmd;
|
|
bdev_io->u.nvme_passthru.buf = buf;
|
|
bdev_io->u.nvme_passthru.nbytes = nbytes;
|
|
bdev_io->u.nvme_passthru.md_buf = NULL;
|
|
bdev_io->u.nvme_passthru.md_len = 0;
|
|
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_nvme_io_passthru(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!desc->write) {
|
|
/*
|
|
* Do not try to parse the NVMe command - we could maybe use bits in the opcode
|
|
* to easily determine if the command is a read or write, but for now just
|
|
* do not allow io_passthru with a read-only descriptor.
|
|
*/
|
|
return -EBADF;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed during nvme_admin_passthru\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO;
|
|
bdev_io->u.nvme_passthru.cmd = *cmd;
|
|
bdev_io->u.nvme_passthru.buf = buf;
|
|
bdev_io->u.nvme_passthru.nbytes = nbytes;
|
|
bdev_io->u.nvme_passthru.md_buf = NULL;
|
|
bdev_io->u.nvme_passthru.md_len = 0;
|
|
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_nvme_io_passthru_md(struct spdk_bdev_desc *desc, struct spdk_io_channel *ch,
|
|
const struct spdk_nvme_cmd *cmd, void *buf, size_t nbytes, void *md_buf, size_t md_len,
|
|
spdk_bdev_io_completion_cb cb, void *cb_arg)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
struct spdk_bdev_io *bdev_io;
|
|
struct spdk_bdev_channel *channel = spdk_io_channel_get_ctx(ch);
|
|
|
|
if (!desc->write) {
|
|
/*
|
|
* Do not try to parse the NVMe command - we could maybe use bits in the opcode
|
|
* to easily determine if the command is a read or write, but for now just
|
|
* do not allow io_passthru with a read-only descriptor.
|
|
*/
|
|
return -EBADF;
|
|
}
|
|
|
|
bdev_io = spdk_bdev_get_io(channel->mgmt_channel);
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io memory allocation failed during nvme_admin_passthru\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bdev_io->ch = channel;
|
|
bdev_io->type = SPDK_BDEV_IO_TYPE_NVME_IO_MD;
|
|
bdev_io->u.nvme_passthru.cmd = *cmd;
|
|
bdev_io->u.nvme_passthru.buf = buf;
|
|
bdev_io->u.nvme_passthru.nbytes = nbytes;
|
|
bdev_io->u.nvme_passthru.md_buf = md_buf;
|
|
bdev_io->u.nvme_passthru.md_len = md_len;
|
|
|
|
spdk_bdev_io_init(bdev_io, bdev, cb_arg, cb);
|
|
|
|
spdk_bdev_io_submit(bdev_io);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_bdev_free_io(struct spdk_bdev_io *bdev_io)
|
|
{
|
|
if (!bdev_io) {
|
|
SPDK_ERRLOG("bdev_io is NULL\n");
|
|
return -1;
|
|
}
|
|
|
|
if (bdev_io->status == SPDK_BDEV_IO_STATUS_PENDING) {
|
|
SPDK_ERRLOG("bdev_io is in pending state\n");
|
|
assert(false);
|
|
return -1;
|
|
}
|
|
|
|
spdk_bdev_put_io(bdev_io);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_ch_retry_io(struct spdk_bdev_channel *bdev_ch)
|
|
{
|
|
struct spdk_bdev *bdev = bdev_ch->bdev;
|
|
struct spdk_bdev_module_channel *shared_ch = bdev_ch->module_ch;
|
|
struct spdk_bdev_io *bdev_io;
|
|
|
|
if (shared_ch->io_outstanding > shared_ch->nomem_threshold) {
|
|
/*
|
|
* Allow some more I/O to complete before retrying the nomem_io queue.
|
|
* Some drivers (such as nvme) cannot immediately take a new I/O in
|
|
* the context of a completion, because the resources for the I/O are
|
|
* not released until control returns to the bdev poller. Also, we
|
|
* may require several small I/O to complete before a larger I/O
|
|
* (that requires splitting) can be submitted.
|
|
*/
|
|
return;
|
|
}
|
|
|
|
while (!TAILQ_EMPTY(&shared_ch->nomem_io)) {
|
|
bdev_io = TAILQ_FIRST(&shared_ch->nomem_io);
|
|
TAILQ_REMOVE(&shared_ch->nomem_io, bdev_io, link);
|
|
bdev_io->ch->io_outstanding++;
|
|
shared_ch->io_outstanding++;
|
|
bdev_io->status = SPDK_BDEV_IO_STATUS_PENDING;
|
|
bdev->fn_table->submit_request(bdev_io->ch->channel, bdev_io);
|
|
if (bdev_io->status == SPDK_BDEV_IO_STATUS_NOMEM) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void
|
|
_spdk_bdev_io_complete(void *ctx)
|
|
{
|
|
struct spdk_bdev_io *bdev_io = ctx;
|
|
|
|
if (spdk_unlikely(bdev_io->in_submit_request || bdev_io->io_submit_ch)) {
|
|
/*
|
|
* Send the completion to the thread that originally submitted the I/O,
|
|
* which may not be the current thread in the case of QoS.
|
|
*/
|
|
if (bdev_io->io_submit_ch) {
|
|
bdev_io->ch = bdev_io->io_submit_ch;
|
|
bdev_io->io_submit_ch = NULL;
|
|
}
|
|
|
|
/*
|
|
* Defer completion to avoid potential infinite recursion if the
|
|
* user's completion callback issues a new I/O.
|
|
*/
|
|
spdk_thread_send_msg(spdk_io_channel_get_thread(bdev_io->ch->channel),
|
|
_spdk_bdev_io_complete, bdev_io);
|
|
return;
|
|
}
|
|
|
|
assert(bdev_io->cb != NULL);
|
|
assert(spdk_get_thread() == spdk_io_channel_get_thread(bdev_io->ch->channel));
|
|
|
|
bdev_io->cb(bdev_io, bdev_io->status == SPDK_BDEV_IO_STATUS_SUCCESS,
|
|
bdev_io->caller_ctx);
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_unfreeze_qos_channel(void *ctx)
|
|
{
|
|
struct spdk_bdev *bdev = ctx;
|
|
|
|
if (bdev->qos_channel) {
|
|
bdev->qos_channel->flags &= ~BDEV_CH_RESET_IN_PROGRESS;
|
|
assert(TAILQ_EMPTY(&bdev->qos_channel->queued_resets));
|
|
}
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_reset_complete(struct spdk_io_channel_iter *i, int status)
|
|
{
|
|
struct spdk_bdev_io *bdev_io = spdk_io_channel_iter_get_ctx(i);
|
|
|
|
if (bdev_io->u.reset.ch_ref != NULL) {
|
|
spdk_put_io_channel(bdev_io->u.reset.ch_ref);
|
|
bdev_io->u.reset.ch_ref = NULL;
|
|
}
|
|
|
|
_spdk_bdev_io_complete(bdev_io);
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_unfreeze_channel(struct spdk_io_channel_iter *i)
|
|
{
|
|
struct spdk_io_channel *_ch = spdk_io_channel_iter_get_channel(i);
|
|
struct spdk_bdev_channel *ch = spdk_io_channel_get_ctx(_ch);
|
|
|
|
ch->flags &= ~BDEV_CH_RESET_IN_PROGRESS;
|
|
if (!TAILQ_EMPTY(&ch->queued_resets)) {
|
|
_spdk_bdev_channel_start_reset(ch);
|
|
}
|
|
|
|
spdk_for_each_channel_continue(i, 0);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_io_complete(struct spdk_bdev_io *bdev_io, enum spdk_bdev_io_status status)
|
|
{
|
|
struct spdk_bdev *bdev = bdev_io->bdev;
|
|
struct spdk_bdev_channel *bdev_ch = bdev_io->ch;
|
|
struct spdk_bdev_module_channel *shared_ch = bdev_ch->module_ch;
|
|
|
|
bdev_io->status = status;
|
|
|
|
if (spdk_unlikely(bdev_io->type == SPDK_BDEV_IO_TYPE_RESET)) {
|
|
bool unlock_channels = false;
|
|
|
|
if (status == SPDK_BDEV_IO_STATUS_NOMEM) {
|
|
SPDK_ERRLOG("NOMEM returned for reset\n");
|
|
}
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
if (bdev_io == bdev->reset_in_progress) {
|
|
bdev->reset_in_progress = NULL;
|
|
unlock_channels = true;
|
|
}
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
|
|
if (unlock_channels) {
|
|
/* Explicitly handle the QoS bdev channel as no IO channel associated */
|
|
if (bdev->qos_thread) {
|
|
spdk_thread_send_msg(bdev->qos_thread,
|
|
_spdk_bdev_unfreeze_qos_channel, bdev);
|
|
}
|
|
|
|
spdk_for_each_channel(__bdev_to_io_dev(bdev), _spdk_bdev_unfreeze_channel,
|
|
bdev_io, _spdk_bdev_reset_complete);
|
|
return;
|
|
}
|
|
} else {
|
|
assert(bdev_ch->io_outstanding > 0);
|
|
assert(shared_ch->io_outstanding > 0);
|
|
bdev_ch->io_outstanding--;
|
|
shared_ch->io_outstanding--;
|
|
|
|
if (spdk_unlikely(status == SPDK_BDEV_IO_STATUS_NOMEM)) {
|
|
TAILQ_INSERT_HEAD(&shared_ch->nomem_io, bdev_io, link);
|
|
/*
|
|
* Wait for some of the outstanding I/O to complete before we
|
|
* retry any of the nomem_io. Normally we will wait for
|
|
* NOMEM_THRESHOLD_COUNT I/O to complete but for low queue
|
|
* depth channels we will instead wait for half to complete.
|
|
*/
|
|
shared_ch->nomem_threshold = spdk_max((int64_t)shared_ch->io_outstanding / 2,
|
|
(int64_t)shared_ch->io_outstanding - NOMEM_THRESHOLD_COUNT);
|
|
return;
|
|
}
|
|
|
|
if (spdk_unlikely(!TAILQ_EMPTY(&shared_ch->nomem_io))) {
|
|
_spdk_bdev_ch_retry_io(bdev_ch);
|
|
}
|
|
}
|
|
|
|
if (status == SPDK_BDEV_IO_STATUS_SUCCESS) {
|
|
switch (bdev_io->type) {
|
|
case SPDK_BDEV_IO_TYPE_READ:
|
|
bdev_ch->stat.bytes_read += bdev_io->u.bdev.num_blocks * bdev->blocklen;
|
|
bdev_ch->stat.num_read_ops++;
|
|
bdev_ch->stat.read_latency_ticks += (spdk_get_ticks() - bdev_io->submit_tsc);
|
|
break;
|
|
case SPDK_BDEV_IO_TYPE_WRITE:
|
|
bdev_ch->stat.bytes_written += bdev_io->u.bdev.num_blocks * bdev->blocklen;
|
|
bdev_ch->stat.num_write_ops++;
|
|
bdev_ch->stat.write_latency_ticks += (spdk_get_ticks() - bdev_io->submit_tsc);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef SPDK_CONFIG_VTUNE
|
|
uint64_t now_tsc = spdk_get_ticks();
|
|
if (now_tsc > (bdev_ch->start_tsc + bdev_ch->interval_tsc)) {
|
|
uint64_t data[5];
|
|
|
|
data[0] = bdev_ch->stat.num_read_ops;
|
|
data[1] = bdev_ch->stat.bytes_read;
|
|
data[2] = bdev_ch->stat.num_write_ops;
|
|
data[3] = bdev_ch->stat.bytes_written;
|
|
data[4] = bdev->fn_table->get_spin_time ?
|
|
bdev->fn_table->get_spin_time(bdev_ch->channel) : 0;
|
|
|
|
__itt_metadata_add(g_bdev_mgr.domain, __itt_null, bdev_ch->handle,
|
|
__itt_metadata_u64, 5, data);
|
|
|
|
memset(&bdev_ch->stat, 0, sizeof(bdev_ch->stat));
|
|
bdev_ch->start_tsc = now_tsc;
|
|
}
|
|
#endif
|
|
|
|
_spdk_bdev_io_complete(bdev_io);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_io_complete_scsi_status(struct spdk_bdev_io *bdev_io, enum spdk_scsi_status sc,
|
|
enum spdk_scsi_sense sk, uint8_t asc, uint8_t ascq)
|
|
{
|
|
if (sc == SPDK_SCSI_STATUS_GOOD) {
|
|
bdev_io->status = SPDK_BDEV_IO_STATUS_SUCCESS;
|
|
} else {
|
|
bdev_io->status = SPDK_BDEV_IO_STATUS_SCSI_ERROR;
|
|
bdev_io->error.scsi.sc = sc;
|
|
bdev_io->error.scsi.sk = sk;
|
|
bdev_io->error.scsi.asc = asc;
|
|
bdev_io->error.scsi.ascq = ascq;
|
|
}
|
|
|
|
spdk_bdev_io_complete(bdev_io, bdev_io->status);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_io_get_scsi_status(const struct spdk_bdev_io *bdev_io,
|
|
int *sc, int *sk, int *asc, int *ascq)
|
|
{
|
|
assert(sc != NULL);
|
|
assert(sk != NULL);
|
|
assert(asc != NULL);
|
|
assert(ascq != NULL);
|
|
|
|
switch (bdev_io->status) {
|
|
case SPDK_BDEV_IO_STATUS_SUCCESS:
|
|
*sc = SPDK_SCSI_STATUS_GOOD;
|
|
*sk = SPDK_SCSI_SENSE_NO_SENSE;
|
|
*asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
|
|
*ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
|
|
break;
|
|
case SPDK_BDEV_IO_STATUS_NVME_ERROR:
|
|
spdk_scsi_nvme_translate(bdev_io, sc, sk, asc, ascq);
|
|
break;
|
|
case SPDK_BDEV_IO_STATUS_SCSI_ERROR:
|
|
*sc = bdev_io->error.scsi.sc;
|
|
*sk = bdev_io->error.scsi.sk;
|
|
*asc = bdev_io->error.scsi.asc;
|
|
*ascq = bdev_io->error.scsi.ascq;
|
|
break;
|
|
default:
|
|
*sc = SPDK_SCSI_STATUS_CHECK_CONDITION;
|
|
*sk = SPDK_SCSI_SENSE_ABORTED_COMMAND;
|
|
*asc = SPDK_SCSI_ASC_NO_ADDITIONAL_SENSE;
|
|
*ascq = SPDK_SCSI_ASCQ_CAUSE_NOT_REPORTABLE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
spdk_bdev_io_complete_nvme_status(struct spdk_bdev_io *bdev_io, int sct, int sc)
|
|
{
|
|
if (sct == SPDK_NVME_SCT_GENERIC && sc == SPDK_NVME_SC_SUCCESS) {
|
|
bdev_io->status = SPDK_BDEV_IO_STATUS_SUCCESS;
|
|
} else {
|
|
bdev_io->error.nvme.sct = sct;
|
|
bdev_io->error.nvme.sc = sc;
|
|
bdev_io->status = SPDK_BDEV_IO_STATUS_NVME_ERROR;
|
|
}
|
|
|
|
spdk_bdev_io_complete(bdev_io, bdev_io->status);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_io_get_nvme_status(const struct spdk_bdev_io *bdev_io, int *sct, int *sc)
|
|
{
|
|
assert(sct != NULL);
|
|
assert(sc != NULL);
|
|
|
|
if (bdev_io->status == SPDK_BDEV_IO_STATUS_NVME_ERROR) {
|
|
*sct = bdev_io->error.nvme.sct;
|
|
*sc = bdev_io->error.nvme.sc;
|
|
} else if (bdev_io->status == SPDK_BDEV_IO_STATUS_SUCCESS) {
|
|
*sct = SPDK_NVME_SCT_GENERIC;
|
|
*sc = SPDK_NVME_SC_SUCCESS;
|
|
} else {
|
|
*sct = SPDK_NVME_SCT_GENERIC;
|
|
*sc = SPDK_NVME_SC_INTERNAL_DEVICE_ERROR;
|
|
}
|
|
}
|
|
|
|
struct spdk_thread *
|
|
spdk_bdev_io_get_thread(struct spdk_bdev_io *bdev_io)
|
|
{
|
|
return spdk_io_channel_get_thread(bdev_io->ch->channel);
|
|
}
|
|
|
|
static void
|
|
_spdk_bdev_qos_config(struct spdk_bdev *bdev)
|
|
{
|
|
struct spdk_conf_section *sp = NULL;
|
|
const char *val = NULL;
|
|
int ios_per_sec = 0;
|
|
int i = 0;
|
|
|
|
sp = spdk_conf_find_section(NULL, "QoS");
|
|
if (!sp) {
|
|
return;
|
|
}
|
|
|
|
while (true) {
|
|
val = spdk_conf_section_get_nmval(sp, "Limit_IOPS", i, 0);
|
|
if (!val) {
|
|
break;
|
|
}
|
|
|
|
if (strcmp(bdev->name, val) != 0) {
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
val = spdk_conf_section_get_nmval(sp, "Limit_IOPS", i, 1);
|
|
if (!val) {
|
|
return;
|
|
}
|
|
|
|
ios_per_sec = (int)strtol(val, NULL, 10);
|
|
if (ios_per_sec > 0) {
|
|
if (ios_per_sec % SPDK_BDEV_QOS_MIN_IOS_PER_SEC) {
|
|
SPDK_ERRLOG("Assigned IOPS %u on bdev %s is not multiple of %u\n",
|
|
ios_per_sec, bdev->name, SPDK_BDEV_QOS_MIN_IOS_PER_SEC);
|
|
SPDK_ERRLOG("Failed to enable QoS on this bdev %s\n", bdev->name);
|
|
} else {
|
|
bdev->ios_per_sec = (uint64_t)ios_per_sec;
|
|
SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Bdev:%s QoS:%lu\n",
|
|
bdev->name, bdev->ios_per_sec);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int
|
|
spdk_bdev_init(struct spdk_bdev *bdev)
|
|
{
|
|
assert(bdev->module != NULL);
|
|
|
|
if (!bdev->name) {
|
|
SPDK_ERRLOG("Bdev name is NULL\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (spdk_bdev_get_by_name(bdev->name)) {
|
|
SPDK_ERRLOG("Bdev name:%s already exists\n", bdev->name);
|
|
return -EEXIST;
|
|
}
|
|
|
|
bdev->status = SPDK_BDEV_STATUS_READY;
|
|
|
|
TAILQ_INIT(&bdev->open_descs);
|
|
|
|
TAILQ_INIT(&bdev->aliases);
|
|
|
|
bdev->reset_in_progress = NULL;
|
|
|
|
_spdk_bdev_qos_config(bdev);
|
|
|
|
spdk_io_device_register(__bdev_to_io_dev(bdev),
|
|
spdk_bdev_channel_create, spdk_bdev_channel_destroy,
|
|
sizeof(struct spdk_bdev_channel));
|
|
|
|
pthread_mutex_init(&bdev->mutex, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_destroy_cb(void *io_device)
|
|
{
|
|
int rc;
|
|
struct spdk_bdev *bdev;
|
|
spdk_bdev_unregister_cb cb_fn;
|
|
void *cb_arg;
|
|
|
|
bdev = __bdev_from_io_dev(io_device);
|
|
cb_fn = bdev->unregister_cb;
|
|
cb_arg = bdev->unregister_ctx;
|
|
|
|
rc = bdev->fn_table->destruct(bdev->ctxt);
|
|
if (rc < 0) {
|
|
SPDK_ERRLOG("destruct failed\n");
|
|
}
|
|
if (rc <= 0 && cb_fn != NULL) {
|
|
cb_fn(cb_arg, rc);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
spdk_bdev_fini(struct spdk_bdev *bdev)
|
|
{
|
|
pthread_mutex_destroy(&bdev->mutex);
|
|
|
|
spdk_io_device_unregister(__bdev_to_io_dev(bdev), spdk_bdev_destroy_cb);
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_start(struct spdk_bdev *bdev)
|
|
{
|
|
struct spdk_bdev_module *module;
|
|
|
|
SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Inserting bdev %s into list\n", bdev->name);
|
|
TAILQ_INSERT_TAIL(&g_bdev_mgr.bdevs, bdev, link);
|
|
|
|
TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, tailq) {
|
|
if (module->examine) {
|
|
module->action_in_progress++;
|
|
module->examine(bdev);
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
spdk_bdev_register(struct spdk_bdev *bdev)
|
|
{
|
|
int rc = spdk_bdev_init(bdev);
|
|
|
|
if (rc == 0) {
|
|
spdk_bdev_start(bdev);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void
|
|
spdk_vbdev_remove_base_bdevs(struct spdk_bdev *vbdev)
|
|
{
|
|
struct spdk_bdev **bdevs;
|
|
struct spdk_bdev *base;
|
|
size_t i, j, k;
|
|
bool found;
|
|
|
|
/* Iterate over base bdevs to remove vbdev from them. */
|
|
for (i = 0; i < vbdev->base_bdevs_cnt; i++) {
|
|
found = false;
|
|
base = vbdev->base_bdevs[i];
|
|
|
|
for (j = 0; j < base->vbdevs_cnt; j++) {
|
|
if (base->vbdevs[j] != vbdev) {
|
|
continue;
|
|
}
|
|
|
|
for (k = j; k + 1 < base->vbdevs_cnt; k++) {
|
|
base->vbdevs[k] = base->vbdevs[k + 1];
|
|
}
|
|
|
|
base->vbdevs_cnt--;
|
|
if (base->vbdevs_cnt > 0) {
|
|
bdevs = realloc(base->vbdevs, base->vbdevs_cnt * sizeof(bdevs[0]));
|
|
/* It would be odd if shrinking memory block fail. */
|
|
assert(bdevs);
|
|
base->vbdevs = bdevs;
|
|
} else {
|
|
free(base->vbdevs);
|
|
base->vbdevs = NULL;
|
|
}
|
|
|
|
found = true;
|
|
break;
|
|
}
|
|
|
|
if (!found) {
|
|
SPDK_WARNLOG("Bdev '%s' is not base bdev of '%s'.\n", base->name, vbdev->name);
|
|
}
|
|
}
|
|
|
|
free(vbdev->base_bdevs);
|
|
vbdev->base_bdevs = NULL;
|
|
vbdev->base_bdevs_cnt = 0;
|
|
}
|
|
|
|
static int
|
|
spdk_vbdev_set_base_bdevs(struct spdk_bdev *vbdev, struct spdk_bdev **base_bdevs, size_t cnt)
|
|
{
|
|
struct spdk_bdev **vbdevs;
|
|
struct spdk_bdev *base;
|
|
size_t i;
|
|
|
|
/* Adding base bdevs isn't supported (yet?). */
|
|
assert(vbdev->base_bdevs_cnt == 0);
|
|
|
|
vbdev->base_bdevs = malloc(cnt * sizeof(vbdev->base_bdevs[0]));
|
|
if (!vbdev->base_bdevs) {
|
|
SPDK_ERRLOG("%s - realloc() failed\n", vbdev->name);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memcpy(vbdev->base_bdevs, base_bdevs, cnt * sizeof(vbdev->base_bdevs[0]));
|
|
vbdev->base_bdevs_cnt = cnt;
|
|
|
|
/* Iterate over base bdevs to add this vbdev to them. */
|
|
for (i = 0; i < cnt; i++) {
|
|
base = vbdev->base_bdevs[i];
|
|
|
|
assert(base != NULL);
|
|
assert(base->claim_module != NULL);
|
|
|
|
vbdevs = realloc(base->vbdevs, (base->vbdevs_cnt + 1) * sizeof(vbdevs[0]));
|
|
if (!vbdevs) {
|
|
SPDK_ERRLOG("%s - realloc() failed\n", base->name);
|
|
spdk_vbdev_remove_base_bdevs(vbdev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
vbdevs[base->vbdevs_cnt] = vbdev;
|
|
base->vbdevs = vbdevs;
|
|
base->vbdevs_cnt++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
spdk_vbdev_register(struct spdk_bdev *vbdev, struct spdk_bdev **base_bdevs, int base_bdev_count)
|
|
{
|
|
int rc;
|
|
|
|
rc = spdk_bdev_init(vbdev);
|
|
if (rc) {
|
|
return rc;
|
|
}
|
|
|
|
if (base_bdev_count == 0) {
|
|
spdk_bdev_start(vbdev);
|
|
return 0;
|
|
}
|
|
|
|
rc = spdk_vbdev_set_base_bdevs(vbdev, base_bdevs, base_bdev_count);
|
|
if (rc) {
|
|
spdk_bdev_fini(vbdev);
|
|
return rc;
|
|
}
|
|
|
|
spdk_bdev_start(vbdev);
|
|
return 0;
|
|
|
|
}
|
|
|
|
void
|
|
spdk_bdev_unregister_done(struct spdk_bdev *bdev, int bdeverrno)
|
|
{
|
|
if (bdev->unregister_cb != NULL) {
|
|
bdev->unregister_cb(bdev->unregister_ctx, bdeverrno);
|
|
}
|
|
}
|
|
|
|
static void
|
|
_remove_notify(void *arg)
|
|
{
|
|
struct spdk_bdev_desc *desc = arg;
|
|
|
|
desc->remove_cb(desc->remove_ctx);
|
|
}
|
|
|
|
void
|
|
spdk_bdev_unregister(struct spdk_bdev *bdev, spdk_bdev_unregister_cb cb_fn, void *cb_arg)
|
|
{
|
|
struct spdk_bdev_desc *desc, *tmp;
|
|
bool do_destruct = true;
|
|
|
|
SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Removing bdev %s from list\n", bdev->name);
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
|
|
spdk_vbdev_remove_base_bdevs(bdev);
|
|
|
|
bdev->status = SPDK_BDEV_STATUS_REMOVING;
|
|
bdev->unregister_cb = cb_fn;
|
|
bdev->unregister_ctx = cb_arg;
|
|
|
|
TAILQ_FOREACH_SAFE(desc, &bdev->open_descs, link, tmp) {
|
|
if (desc->remove_cb) {
|
|
do_destruct = false;
|
|
/*
|
|
* Defer invocation of the remove_cb to a separate message that will
|
|
* run later on this thread. This ensures this context unwinds and
|
|
* we don't recursively unregister this bdev again if the remove_cb
|
|
* immediately closes its descriptor.
|
|
*/
|
|
spdk_thread_send_msg(spdk_get_thread(), _remove_notify, desc);
|
|
}
|
|
}
|
|
|
|
if (!do_destruct) {
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
return;
|
|
}
|
|
|
|
TAILQ_REMOVE(&g_bdev_mgr.bdevs, bdev, link);
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
|
|
spdk_bdev_fini(bdev);
|
|
}
|
|
|
|
int
|
|
spdk_bdev_open(struct spdk_bdev *bdev, bool write, spdk_bdev_remove_cb_t remove_cb,
|
|
void *remove_ctx, struct spdk_bdev_desc **_desc)
|
|
{
|
|
struct spdk_bdev_desc *desc;
|
|
|
|
desc = calloc(1, sizeof(*desc));
|
|
if (desc == NULL) {
|
|
SPDK_ERRLOG("Failed to allocate memory for bdev descriptor\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
|
|
if (write && bdev->claim_module) {
|
|
SPDK_INFOLOG(SPDK_LOG_BDEV, "Could not open %s - already claimed\n", bdev->name);
|
|
free(desc);
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
return -EPERM;
|
|
}
|
|
|
|
TAILQ_INSERT_TAIL(&bdev->open_descs, desc, link);
|
|
|
|
desc->bdev = bdev;
|
|
desc->remove_cb = remove_cb;
|
|
desc->remove_ctx = remove_ctx;
|
|
desc->write = write;
|
|
*_desc = desc;
|
|
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
spdk_bdev_close(struct spdk_bdev_desc *desc)
|
|
{
|
|
struct spdk_bdev *bdev = desc->bdev;
|
|
bool do_unregister = false;
|
|
|
|
pthread_mutex_lock(&bdev->mutex);
|
|
|
|
TAILQ_REMOVE(&bdev->open_descs, desc, link);
|
|
free(desc);
|
|
|
|
if (bdev->status == SPDK_BDEV_STATUS_REMOVING && TAILQ_EMPTY(&bdev->open_descs)) {
|
|
do_unregister = true;
|
|
}
|
|
pthread_mutex_unlock(&bdev->mutex);
|
|
|
|
if (do_unregister == true) {
|
|
spdk_bdev_unregister(bdev, bdev->unregister_cb, bdev->unregister_ctx);
|
|
}
|
|
}
|
|
|
|
int
|
|
spdk_bdev_module_claim_bdev(struct spdk_bdev *bdev, struct spdk_bdev_desc *desc,
|
|
struct spdk_bdev_module *module)
|
|
{
|
|
if (bdev->claim_module != NULL) {
|
|
SPDK_ERRLOG("bdev %s already claimed by module %s\n", bdev->name,
|
|
bdev->claim_module->name);
|
|
return -EPERM;
|
|
}
|
|
|
|
if (desc && !desc->write) {
|
|
desc->write = true;
|
|
}
|
|
|
|
bdev->claim_module = module;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
spdk_bdev_module_release_bdev(struct spdk_bdev *bdev)
|
|
{
|
|
assert(bdev->claim_module != NULL);
|
|
bdev->claim_module = NULL;
|
|
}
|
|
|
|
struct spdk_bdev *
|
|
spdk_bdev_desc_get_bdev(struct spdk_bdev_desc *desc)
|
|
{
|
|
return desc->bdev;
|
|
}
|
|
|
|
void
|
|
spdk_bdev_io_get_iovec(struct spdk_bdev_io *bdev_io, struct iovec **iovp, int *iovcntp)
|
|
{
|
|
struct iovec *iovs;
|
|
int iovcnt;
|
|
|
|
if (bdev_io == NULL) {
|
|
return;
|
|
}
|
|
|
|
switch (bdev_io->type) {
|
|
case SPDK_BDEV_IO_TYPE_READ:
|
|
iovs = bdev_io->u.bdev.iovs;
|
|
iovcnt = bdev_io->u.bdev.iovcnt;
|
|
break;
|
|
case SPDK_BDEV_IO_TYPE_WRITE:
|
|
iovs = bdev_io->u.bdev.iovs;
|
|
iovcnt = bdev_io->u.bdev.iovcnt;
|
|
break;
|
|
default:
|
|
iovs = NULL;
|
|
iovcnt = 0;
|
|
break;
|
|
}
|
|
|
|
if (iovp) {
|
|
*iovp = iovs;
|
|
}
|
|
if (iovcntp) {
|
|
*iovcntp = iovcnt;
|
|
}
|
|
}
|
|
|
|
void
|
|
spdk_bdev_module_list_add(struct spdk_bdev_module *bdev_module)
|
|
{
|
|
|
|
if (spdk_bdev_module_list_find(bdev_module->name)) {
|
|
fprintf(stderr, "ERROR: module '%s' already registered.\n", bdev_module->name);
|
|
assert(false);
|
|
}
|
|
|
|
if (bdev_module->async_init) {
|
|
bdev_module->action_in_progress = 1;
|
|
}
|
|
|
|
/*
|
|
* Modules with examine callbacks must be initialized first, so they are
|
|
* ready to handle examine callbacks from later modules that will
|
|
* register physical bdevs.
|
|
*/
|
|
if (bdev_module->examine != NULL) {
|
|
TAILQ_INSERT_HEAD(&g_bdev_mgr.bdev_modules, bdev_module, tailq);
|
|
} else {
|
|
TAILQ_INSERT_TAIL(&g_bdev_mgr.bdev_modules, bdev_module, tailq);
|
|
}
|
|
}
|
|
|
|
struct spdk_bdev_module *
|
|
spdk_bdev_module_list_find(const char *name)
|
|
{
|
|
struct spdk_bdev_module *bdev_module;
|
|
|
|
TAILQ_FOREACH(bdev_module, &g_bdev_mgr.bdev_modules, tailq) {
|
|
if (strcmp(name, bdev_module->name) == 0) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return bdev_module;
|
|
}
|
|
|
|
static void
|
|
spdk_bdev_write_zeroes_split(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
|
|
{
|
|
uint64_t len;
|
|
|
|
if (!success) {
|
|
bdev_io->cb = bdev_io->u.bdev.stored_user_cb;
|
|
_spdk_bdev_io_complete(bdev_io);
|
|
return;
|
|
}
|
|
|
|
/* no need to perform the error checking from write_zeroes_blocks because this request already passed those checks. */
|
|
len = spdk_min(spdk_bdev_get_block_size(bdev_io->bdev) * bdev_io->u.bdev.split_remaining_num_blocks,
|
|
ZERO_BUFFER_SIZE);
|
|
|
|
bdev_io->u.bdev.offset_blocks = bdev_io->u.bdev.split_current_offset_blocks;
|
|
bdev_io->u.bdev.iov.iov_len = len;
|
|
bdev_io->u.bdev.num_blocks = len / spdk_bdev_get_block_size(bdev_io->bdev);
|
|
bdev_io->u.bdev.split_remaining_num_blocks -= bdev_io->u.bdev.num_blocks;
|
|
bdev_io->u.bdev.split_current_offset_blocks += bdev_io->u.bdev.num_blocks;
|
|
|
|
/* if this round completes the i/o, change the callback to be the original user callback */
|
|
if (bdev_io->u.bdev.split_remaining_num_blocks == 0) {
|
|
spdk_bdev_io_init(bdev_io, bdev_io->bdev, cb_arg, bdev_io->u.bdev.stored_user_cb);
|
|
} else {
|
|
spdk_bdev_io_init(bdev_io, bdev_io->bdev, cb_arg, spdk_bdev_write_zeroes_split);
|
|
}
|
|
spdk_bdev_io_submit(bdev_io);
|
|
}
|
|
|
|
SPDK_LOG_REGISTER_COMPONENT("bdev", SPDK_LOG_BDEV)
|