From 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 20:24:20 +0200 Subject: Adding upstream version 14.2.21. Signed-off-by: Daniel Baumann --- src/spdk/lib/bdev/gpt/vbdev_gpt.c | 463 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 463 insertions(+) create mode 100644 src/spdk/lib/bdev/gpt/vbdev_gpt.c (limited to 'src/spdk/lib/bdev/gpt/vbdev_gpt.c') diff --git a/src/spdk/lib/bdev/gpt/vbdev_gpt.c b/src/spdk/lib/bdev/gpt/vbdev_gpt.c new file mode 100644 index 00000000..751af0ea --- /dev/null +++ b/src/spdk/lib/bdev/gpt/vbdev_gpt.c @@ -0,0 +1,463 @@ +/*- + * BSD LICENSE + * + * Copyright (c) Intel Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * This driver reads a GPT partition table from a bdev and exposes a virtual block device for + * each partition. + */ + +#include "gpt.h" + +#include "spdk/conf.h" +#include "spdk/endian.h" +#include "spdk/env.h" +#include "spdk/thread.h" +#include "spdk/rpc.h" +#include "spdk/string.h" +#include "spdk/util.h" + +#include "spdk/bdev_module.h" +#include "spdk_internal/log.h" + +static int vbdev_gpt_init(void); +static void vbdev_gpt_examine(struct spdk_bdev *bdev); +static int vbdev_gpt_get_ctx_size(void); + +static struct spdk_bdev_module gpt_if = { + .name = "gpt", + .module_init = vbdev_gpt_init, + .get_ctx_size = vbdev_gpt_get_ctx_size, + .examine_disk = vbdev_gpt_examine, + +}; +SPDK_BDEV_MODULE_REGISTER(&gpt_if) + +/* Base block device gpt context */ +struct gpt_base { + struct spdk_gpt gpt; + struct spdk_bdev_part_base *part_base; + + /* This channel is only used for reading the partition table. */ + struct spdk_io_channel *ch; +}; + +/* Context for each gpt virtual bdev */ +struct gpt_disk { + struct spdk_bdev_part part; + uint32_t partition_index; +}; + +struct gpt_channel { + struct spdk_bdev_part_channel part_ch; +}; + +struct gpt_io { + struct spdk_io_channel *ch; + struct spdk_bdev_io *bdev_io; + + /* for bdev_io_wait */ + struct spdk_bdev_io_wait_entry bdev_io_wait; +}; + +static SPDK_BDEV_PART_TAILQ g_gpt_disks = TAILQ_HEAD_INITIALIZER(g_gpt_disks); + +static bool g_gpt_disabled; + +static void +spdk_gpt_base_free(void *ctx) +{ + struct gpt_base *gpt_base = ctx; + + spdk_dma_free(gpt_base->gpt.buf); + free(gpt_base); +} + +static void +spdk_gpt_base_bdev_hotremove_cb(void *_base_bdev) +{ + spdk_bdev_part_base_hotremove(_base_bdev, &g_gpt_disks); +} + +static int vbdev_gpt_destruct(void *ctx); +static void vbdev_gpt_submit_request(struct spdk_io_channel *_ch, struct spdk_bdev_io *bdev_io); +static int vbdev_gpt_dump_info_json(void *ctx, struct spdk_json_write_ctx *w); + +static struct spdk_bdev_fn_table vbdev_gpt_fn_table = { + .destruct = vbdev_gpt_destruct, + .submit_request = vbdev_gpt_submit_request, + .dump_info_json = vbdev_gpt_dump_info_json, +}; + +static struct gpt_base * +spdk_gpt_base_bdev_init(struct spdk_bdev *bdev) +{ + struct gpt_base *gpt_base; + struct spdk_gpt *gpt; + + gpt_base = calloc(1, sizeof(*gpt_base)); + if (!gpt_base) { + SPDK_ERRLOG("Cannot alloc memory for gpt_base pointer\n"); + return NULL; + } + + gpt_base->part_base = spdk_bdev_part_base_construct(bdev, + spdk_gpt_base_bdev_hotremove_cb, + &gpt_if, &vbdev_gpt_fn_table, + &g_gpt_disks, spdk_gpt_base_free, gpt_base, + sizeof(struct gpt_channel), NULL, NULL); + if (!gpt_base->part_base) { + free(gpt_base); + SPDK_ERRLOG("cannot construct gpt_base"); + return NULL; + } + + gpt = &gpt_base->gpt; + gpt->buf_size = spdk_max(SPDK_GPT_BUFFER_SIZE, bdev->blocklen); + gpt->buf = spdk_dma_zmalloc(gpt->buf_size, spdk_bdev_get_buf_align(bdev), NULL); + if (!gpt->buf) { + SPDK_ERRLOG("Cannot alloc buf\n"); + spdk_bdev_part_base_free(gpt_base->part_base); + return NULL; + } + + gpt->sector_size = bdev->blocklen; + gpt->total_sectors = bdev->blockcnt; + gpt->lba_start = 0; + gpt->lba_end = gpt->total_sectors - 1; + + return gpt_base; +} + +static int +vbdev_gpt_destruct(void *ctx) +{ + struct gpt_disk *gpt_disk = ctx; + + return spdk_bdev_part_free(&gpt_disk->part); +} + +static void +vbdev_gpt_resubmit_request(void *arg) +{ + struct gpt_io *io = (struct gpt_io *)arg; + + vbdev_gpt_submit_request(io->ch, io->bdev_io); +} + +static void +vbdev_gpt_queue_io(struct gpt_io *io) +{ + int rc; + + io->bdev_io_wait.bdev = io->bdev_io->bdev; + io->bdev_io_wait.cb_fn = vbdev_gpt_resubmit_request; + io->bdev_io_wait.cb_arg = io; + + rc = spdk_bdev_queue_io_wait(io->bdev_io->bdev, + io->ch, &io->bdev_io_wait); + if (rc != 0) { + SPDK_ERRLOG("Queue io failed in vbdev_gpt_queue_io, rc=%d.\n", rc); + spdk_bdev_io_complete(io->bdev_io, SPDK_BDEV_IO_STATUS_FAILED); + } +} + +static void +vbdev_gpt_submit_request(struct spdk_io_channel *_ch, struct spdk_bdev_io *bdev_io) +{ + struct gpt_channel *ch = spdk_io_channel_get_ctx(_ch); + struct gpt_io *io = (struct gpt_io *)bdev_io->driver_ctx; + int rc; + + rc = spdk_bdev_part_submit_request(&ch->part_ch, bdev_io); + if (rc) { + if (rc == -ENOMEM) { + SPDK_DEBUGLOG(SPDK_LOG_VBDEV_GPT, "gpt: no memory, queue io\n"); + io->ch = _ch; + io->bdev_io = bdev_io; + vbdev_gpt_queue_io(io); + } else { + SPDK_ERRLOG("gpt: error on bdev_io submission, rc=%d.\n", rc); + spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED); + } + } +} + +static void +write_guid(struct spdk_json_write_ctx *w, const struct spdk_gpt_guid *guid) +{ + spdk_json_write_string_fmt(w, "%08x-%04x-%04x-%04x-%04x%08x", + from_le32(&guid->raw[0]), + from_le16(&guid->raw[4]), + from_le16(&guid->raw[6]), + from_be16(&guid->raw[8]), + from_be16(&guid->raw[10]), + from_be32(&guid->raw[12])); +} + +static void +write_string_utf16le(struct spdk_json_write_ctx *w, const uint16_t *str, size_t max_len) +{ + size_t len; + const uint16_t *p; + + for (len = 0, p = str; len < max_len && *p; p++) { + len++; + } + + spdk_json_write_string_utf16le_raw(w, str, len); +} + +static int +vbdev_gpt_dump_info_json(void *ctx, struct spdk_json_write_ctx *w) +{ + struct gpt_disk *gpt_disk = SPDK_CONTAINEROF(ctx, struct gpt_disk, part); + struct spdk_bdev_part_base *base_bdev = spdk_bdev_part_get_base(&gpt_disk->part); + struct gpt_base *gpt_base = spdk_bdev_part_base_get_ctx(base_bdev); + struct spdk_bdev *part_base_bdev = spdk_bdev_part_base_get_bdev(base_bdev); + struct spdk_gpt *gpt = &gpt_base->gpt; + struct spdk_gpt_partition_entry *gpt_entry = &gpt->partitions[gpt_disk->partition_index]; + uint64_t offset_blocks = spdk_bdev_part_get_offset_blocks(&gpt_disk->part); + + spdk_json_write_name(w, "gpt"); + spdk_json_write_object_begin(w); + + spdk_json_write_name(w, "base_bdev"); + spdk_json_write_string(w, spdk_bdev_get_name(part_base_bdev)); + + spdk_json_write_name(w, "offset_blocks"); + spdk_json_write_uint64(w, offset_blocks); + + spdk_json_write_name(w, "partition_type_guid"); + write_guid(w, &gpt_entry->part_type_guid); + + spdk_json_write_name(w, "unique_partition_guid"); + write_guid(w, &gpt_entry->unique_partition_guid); + + spdk_json_write_name(w, "partition_name"); + write_string_utf16le(w, gpt_entry->partition_name, SPDK_COUNTOF(gpt_entry->partition_name)); + + spdk_json_write_object_end(w); + + return 0; +} + +static int +vbdev_gpt_create_bdevs(struct gpt_base *gpt_base) +{ + uint32_t num_partition_entries; + uint64_t i, head_lba_start, head_lba_end; + uint32_t num_partitions; + struct spdk_gpt_partition_entry *p; + struct gpt_disk *d; + struct spdk_gpt *gpt; + char *name; + struct spdk_bdev *base_bdev; + int rc; + + gpt = &gpt_base->gpt; + num_partition_entries = from_le32(&gpt->header->num_partition_entries); + head_lba_start = from_le64(&gpt->header->first_usable_lba); + head_lba_end = from_le64(&gpt->header->last_usable_lba); + num_partitions = 0; + + for (i = 0; i < num_partition_entries; i++) { + p = &gpt->partitions[i]; + uint64_t lba_start = from_le64(&p->starting_lba); + uint64_t lba_end = from_le64(&p->ending_lba); + + if (!SPDK_GPT_GUID_EQUAL(&gpt->partitions[i].part_type_guid, + &SPDK_GPT_PART_TYPE_GUID) || + lba_start == 0) { + continue; + } + if (lba_start < head_lba_start || lba_end > head_lba_end) { + continue; + } + + d = calloc(1, sizeof(*d)); + if (!d) { + SPDK_ERRLOG("Memory allocation failure\n"); + return -1; + } + + /* index start at 1 instead of 0 to match the existing style */ + base_bdev = spdk_bdev_part_base_get_bdev(gpt_base->part_base); + name = spdk_sprintf_alloc("%sp%" PRIu64, spdk_bdev_get_name(base_bdev), i + 1); + if (!name) { + SPDK_ERRLOG("name allocation failure\n"); + free(d); + return -1; + } + + rc = spdk_bdev_part_construct(&d->part, gpt_base->part_base, name, + lba_start, lba_end - lba_start, "GPT Disk"); + free(name); + if (rc) { + SPDK_ERRLOG("could not construct bdev part\n"); + /* spdk_bdev_part_construct will free name on failure */ + free(d); + return -1; + } + num_partitions++; + d->partition_index = i; + } + + return num_partitions; +} + +static void +spdk_gpt_bdev_complete(struct spdk_bdev_io *bdev_io, bool status, void *arg) +{ + struct gpt_base *gpt_base = (struct gpt_base *)arg; + struct spdk_bdev *bdev = spdk_bdev_part_base_get_bdev(gpt_base->part_base); + int rc, num_partitions = 0; + + spdk_bdev_free_io(bdev_io); + spdk_put_io_channel(gpt_base->ch); + gpt_base->ch = NULL; + + if (status != SPDK_BDEV_IO_STATUS_SUCCESS) { + SPDK_ERRLOG("Gpt: bdev=%s io error status=%d\n", + spdk_bdev_get_name(bdev), status); + goto end; + } + + rc = spdk_gpt_parse(&gpt_base->gpt); + if (rc) { + SPDK_DEBUGLOG(SPDK_LOG_VBDEV_GPT, "Failed to parse gpt\n"); + goto end; + } + + num_partitions = vbdev_gpt_create_bdevs(gpt_base); + if (num_partitions < 0) { + SPDK_DEBUGLOG(SPDK_LOG_VBDEV_GPT, "Failed to split dev=%s by gpt table\n", + spdk_bdev_get_name(bdev)); + } + +end: + /* + * Notify the generic bdev layer that the actions related to the original examine + * callback are now completed. + */ + spdk_bdev_module_examine_done(&gpt_if); + + /* + * vbdev_gpt_create_bdevs returns the number of bdevs created upon success. + * We can branch on this value. + */ + if (num_partitions <= 0) { + /* If no gpt_disk instances were created, free the base context */ + spdk_bdev_part_base_free(gpt_base->part_base); + } +} + +static int +vbdev_gpt_read_gpt(struct spdk_bdev *bdev) +{ + struct gpt_base *gpt_base; + struct spdk_bdev_desc *part_base_desc; + int rc; + + gpt_base = spdk_gpt_base_bdev_init(bdev); + if (!gpt_base) { + SPDK_ERRLOG("Cannot allocated gpt_base\n"); + return -1; + } + + part_base_desc = spdk_bdev_part_base_get_desc(gpt_base->part_base); + gpt_base->ch = spdk_bdev_get_io_channel(part_base_desc); + if (gpt_base->ch == NULL) { + SPDK_ERRLOG("Failed to get an io_channel.\n"); + spdk_bdev_part_base_free(gpt_base->part_base); + return -1; + } + + rc = spdk_bdev_read(part_base_desc, gpt_base->ch, gpt_base->gpt.buf, 0, + gpt_base->gpt.buf_size, spdk_gpt_bdev_complete, gpt_base); + if (rc < 0) { + spdk_put_io_channel(gpt_base->ch); + spdk_bdev_part_base_free(gpt_base->part_base); + SPDK_ERRLOG("Failed to send bdev_io command\n"); + return -1; + } + + return 0; +} + +static int +vbdev_gpt_init(void) +{ + struct spdk_conf_section *sp = spdk_conf_find_section(NULL, "Gpt"); + + if (sp && spdk_conf_section_get_boolval(sp, "Disable", false)) { + /* Disable Gpt probe */ + g_gpt_disabled = true; + } + + return 0; +} + +static int +vbdev_gpt_get_ctx_size(void) +{ + return sizeof(struct gpt_io); +} + +static void +vbdev_gpt_examine(struct spdk_bdev *bdev) +{ + int rc; + + /* A bdev with fewer than 2 blocks cannot have a GPT. Block 0 has + * the MBR and block 1 has the GPT header. + */ + if (g_gpt_disabled || spdk_bdev_get_num_blocks(bdev) < 2) { + spdk_bdev_module_examine_done(&gpt_if); + return; + } + + if (spdk_bdev_get_block_size(bdev) % 512 != 0) { + SPDK_ERRLOG("GPT module does not support block size %" PRIu32 " for bdev %s\n", + spdk_bdev_get_block_size(bdev), spdk_bdev_get_name(bdev)); + spdk_bdev_module_examine_done(&gpt_if); + return; + } + + rc = vbdev_gpt_read_gpt(bdev); + if (rc) { + spdk_bdev_module_examine_done(&gpt_if); + SPDK_ERRLOG("Failed to read info from bdev %s\n", spdk_bdev_get_name(bdev)); + } +} + +SPDK_LOG_REGISTER_COMPONENT("vbdev_gpt", SPDK_LOG_VBDEV_GPT) -- cgit v1.2.3