bdev/gpt: use new bdev_part helper functions

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I08bb5e099f1164cedce7a4beabebadf7de270945

Reviewed-on: https://review.gerrithub.io/376444
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Cunyin Chang <cunyin.chang@intel.com>
Reviewed-by: Ziye Yang <optimistyzy@gmail.com>
This commit is contained in:
Jim Harris 2017-08-30 12:25:00 -07:00
parent 1269a5e636
commit 1f6fe13ff7

View File

@ -53,54 +53,50 @@ SPDK_DECLARE_BDEV_MODULE(gpt);
/* Base block device gpt context */
struct gpt_base {
struct spdk_bdev_desc *desc;
struct spdk_bdev *bdev;
struct spdk_gpt gpt;
struct spdk_io_channel *ch;
uint32_t ref;
struct spdk_bdev_part_base part_base;
struct spdk_gpt gpt;
/* 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 disk;
struct spdk_bdev_part part;
uint32_t partition_index;
struct gpt_base *base;
uint64_t offset_blocks;
TAILQ_ENTRY(gpt_disk) tailq;
};
static TAILQ_HEAD(, gpt_disk) g_gpt_disks = TAILQ_HEAD_INITIALIZER(g_gpt_disks);
static TAILQ_HEAD(, spdk_bdev) g_bdevs = TAILQ_HEAD_INITIALIZER(g_bdevs);
struct gpt_channel {
struct spdk_bdev_part_channel part_ch;
};
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(struct gpt_base *gpt_base)
{
assert(gpt_base->ch == NULL);
assert(gpt_base->bdev);
assert(gpt_base->desc);
if (gpt_base->bdev->claim_module == SPDK_GET_BDEV_MODULE(gpt)) {
spdk_bdev_module_release_bdev(gpt_base->bdev);
}
spdk_bdev_close(gpt_base->desc);
spdk_dma_free(gpt_base->gpt.buf);
free(gpt_base);
}
static void
spdk_gpt_base_bdev_hotremove_cb(void *remove_ctx)
spdk_gpt_base_bdev_hotremove_cb(void *_base_bdev)
{
struct spdk_bdev *base_bdev = remove_ctx;
struct gpt_disk *gpt_disk, *tmp;
TAILQ_FOREACH_SAFE(gpt_disk, &g_gpt_disks, tailq, tmp) {
if (gpt_disk->base->bdev == base_bdev) {
spdk_bdev_unregister(&gpt_disk->disk);
}
}
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_config_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_config_json = vbdev_gpt_dump_config_json,
};
static struct gpt_base *
spdk_gpt_base_bdev_init(struct spdk_bdev *bdev)
{
@ -114,8 +110,16 @@ spdk_gpt_base_bdev_init(struct spdk_bdev *bdev)
return NULL;
}
gpt_base->bdev = bdev;
gpt_base->ref = 0;
rc = spdk_bdev_part_base_construct(&gpt_base->part_base, bdev,
spdk_gpt_base_bdev_hotremove_cb,
SPDK_GET_BDEV_MODULE(gpt), &vbdev_gpt_fn_table,
&g_gpt_disks, sizeof(struct gpt_channel),
NULL, NULL);
if (rc) {
SPDK_ERRLOG("cannot construct gpt_base");
free(gpt_base);
return NULL;
}
gpt = &gpt_base->gpt;
gpt->buf = spdk_dma_zmalloc(SPDK_GPT_BUFFER_SIZE, 0x1000, NULL);
@ -130,134 +134,7 @@ spdk_gpt_base_bdev_init(struct spdk_bdev *bdev)
gpt->lba_start = 0;
gpt->lba_end = gpt->total_sectors - 1;
rc = spdk_bdev_open(gpt_base->bdev, false, spdk_gpt_base_bdev_hotremove_cb, bdev,
&gpt_base->desc);
if (rc != 0) {
SPDK_ERRLOG("Could not open bdev %s, error=%d\n",
spdk_bdev_get_name(gpt_base->bdev), rc);
spdk_dma_free(gpt->buf);
free(gpt_base);
return NULL;
}
gpt_base->ch = spdk_bdev_get_io_channel(gpt_base->desc);
if (!gpt_base->ch) {
SPDK_ERRLOG("Cannot allocate ch\n");
spdk_bdev_close(gpt_base->desc);
spdk_dma_free(gpt->buf);
free(gpt_base);
return NULL;
}
return gpt_base;
}
static void
gpt_read(struct gpt_disk *gpt_disk, struct spdk_bdev_io *bdev_io)
{
bdev_io->u.read.offset_blocks += gpt_disk->offset_blocks;
}
static void
gpt_write(struct gpt_disk *gpt_disk, struct spdk_bdev_io *bdev_io)
{
bdev_io->u.write.offset_blocks += gpt_disk->offset_blocks;
}
static void
gpt_unmap(struct gpt_disk *gpt_disk, struct spdk_bdev_io *bdev_io)
{
bdev_io->u.unmap.offset_blocks += gpt_disk->offset_blocks;
}
static void
gpt_flush(struct gpt_disk *gpt_disk, struct spdk_bdev_io *bdev_io)
{
bdev_io->u.flush.offset_blocks += gpt_disk->offset_blocks;
}
static void
_vbdev_gpt_complete_reset(struct spdk_bdev_io *bdev_io, bool success, void *cb_arg)
{
struct spdk_bdev_io *gpt_io = cb_arg;
struct spdk_io_channel *base_ch = *(struct spdk_io_channel **)gpt_io->driver_ctx;
spdk_put_io_channel(base_ch);
spdk_bdev_io_complete(gpt_io, success);
spdk_bdev_free_io(bdev_io);
}
static void
vbdev_gpt_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io)
{
struct gpt_disk *gpt_disk = bdev_io->bdev->ctxt;
struct spdk_io_channel *base_ch;
/* Modify the I/O to adjust for the offset within the base bdev. */
switch (bdev_io->type) {
case SPDK_BDEV_IO_TYPE_READ:
gpt_read(gpt_disk, bdev_io);
break;
case SPDK_BDEV_IO_TYPE_WRITE:
gpt_write(gpt_disk, bdev_io);
break;
case SPDK_BDEV_IO_TYPE_UNMAP:
gpt_unmap(gpt_disk, bdev_io);
break;
case SPDK_BDEV_IO_TYPE_FLUSH:
gpt_flush(gpt_disk, bdev_io);
break;
case SPDK_BDEV_IO_TYPE_RESET:
base_ch = spdk_get_io_channel(gpt_disk->base->bdev);
*(struct spdk_io_channel **)bdev_io->driver_ctx = base_ch;
spdk_bdev_reset(gpt_disk->base->desc, base_ch,
_vbdev_gpt_complete_reset, bdev_io);
return;
default:
SPDK_ERRLOG("gpt: unknown I/O type %d\n", bdev_io->type);
spdk_bdev_io_complete(bdev_io, SPDK_BDEV_IO_STATUS_FAILED);
return;
}
/* Submit the modified I/O to the underlying bdev. */
spdk_bdev_io_resubmit(bdev_io, gpt_disk->base->desc);
}
static void
vbdev_gpt_base_get_ref(struct gpt_base *gpt_base,
struct gpt_disk *gpt_disk)
{
__sync_fetch_and_add(&gpt_base->ref, 1);
gpt_disk->base = gpt_base;
}
static void
vbdev_gpt_base_put_ref(struct gpt_base *gpt_base)
{
if (__sync_sub_and_fetch(&gpt_base->ref, 1) == 0) {
spdk_gpt_base_free(gpt_base);
}
}
static void
vbdev_gpt_free(struct gpt_disk *gpt_disk)
{
struct gpt_base *gpt_base;
if (!gpt_disk) {
return;
}
gpt_base = gpt_disk->base;
TAILQ_REMOVE(&g_gpt_disks, gpt_disk, tailq);
free(gpt_disk->disk.name);
free(gpt_disk);
assert(gpt_base != NULL);
vbdev_gpt_base_put_ref(gpt_base);
}
static int
@ -265,25 +142,16 @@ vbdev_gpt_destruct(void *ctx)
{
struct gpt_disk *gpt_disk = ctx;
vbdev_gpt_free(gpt_disk);
spdk_bdev_part_free(&gpt_disk->part);
return 0;
}
static bool
vbdev_gpt_io_type_supported(void *ctx, enum spdk_bdev_io_type io_type)
static void
vbdev_gpt_submit_request(struct spdk_io_channel *_ch, struct spdk_bdev_io *bdev_io)
{
struct gpt_disk *gpt_disk = ctx;
struct gpt_channel *ch = spdk_io_channel_get_ctx(_ch);
return gpt_disk->base->bdev->fn_table->io_type_supported(gpt_disk->base->bdev,
io_type);
}
static struct spdk_io_channel *
vbdev_gpt_get_io_channel(void *ctx)
{
struct gpt_disk *gpt_disk = ctx;
return gpt_disk->base->bdev->fn_table->get_io_channel(gpt_disk->base->bdev);
spdk_bdev_part_submit_request(&ch->part_ch, bdev_io);
}
static void
@ -315,17 +183,18 @@ static int
vbdev_gpt_dump_config_json(void *ctx, struct spdk_json_write_ctx *w)
{
struct gpt_disk *gpt_disk = ctx;
struct spdk_gpt *gpt = &gpt_disk->base->gpt;
struct gpt_base *gpt_base = (struct gpt_base *)gpt_disk->part.base;
struct spdk_gpt *gpt = &gpt_base->gpt;
struct spdk_gpt_partition_entry *gpt_entry = &gpt->partitions[gpt_disk->partition_index];
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(gpt_disk->base->bdev));
spdk_json_write_string(w, spdk_bdev_get_name(gpt_disk->part.base->bdev));
spdk_json_write_name(w, "offset_blocks");
spdk_json_write_uint64(w, gpt_disk->offset_blocks);
spdk_json_write_uint64(w, gpt_disk->part.offset_blocks);
spdk_json_write_name(w, "partition_type_guid");
write_guid(w, &gpt_entry->part_type_guid);
@ -341,14 +210,6 @@ vbdev_gpt_dump_config_json(void *ctx, struct spdk_json_write_ctx *w)
return 0;
}
static struct spdk_bdev_fn_table vbdev_gpt_fn_table = {
.destruct = vbdev_gpt_destruct,
.io_type_supported = vbdev_gpt_io_type_supported,
.submit_request = vbdev_gpt_submit_request,
.get_io_channel = vbdev_gpt_get_io_channel,
.dump_config_json = vbdev_gpt_dump_config_json,
};
static int
vbdev_gpt_create_bdevs(struct gpt_base *gpt_base)
{
@ -356,8 +217,10 @@ vbdev_gpt_create_bdevs(struct gpt_base *gpt_base)
uint64_t i, head_lba_start, head_lba_end;
struct spdk_gpt_partition_entry *p;
struct gpt_disk *d;
struct spdk_bdev *base_bdev = gpt_base->bdev;
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);
@ -384,36 +247,25 @@ vbdev_gpt_create_bdevs(struct gpt_base *gpt_base)
return -1;
}
/* Copy properties of the base bdev */
d->disk.blocklen = base_bdev->blocklen;
d->disk.write_cache = base_bdev->write_cache;
d->disk.need_aligned_buffer = base_bdev->need_aligned_buffer;
/* index start at 1 instead of 0 to match the existing style */
d->disk.name = spdk_sprintf_alloc("%sp%" PRIu64, spdk_bdev_get_name(base_bdev), i + 1);
if (!d->disk.name) {
base_bdev = gpt_base->part_base.bdev;
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");
if (rc) {
SPDK_ERRLOG("could not construct bdev part\n");
/* spdk_bdev_part_construct will free name on failure */
free(d);
SPDK_ERRLOG("Failed to allocate disk name\n");
return -1;
}
d->partition_index = i;
d->disk.product_name = "GPT Disk";
d->offset_blocks = lba_start;
d->disk.blockcnt = lba_end - lba_start;
d->disk.ctxt = d;
d->disk.fn_table = &vbdev_gpt_fn_table;
d->disk.module = SPDK_GET_BDEV_MODULE(gpt);
SPDK_DEBUGLOG(SPDK_TRACE_VBDEV_GPT, "gpt vbdev %s: base bdev: %s"
" offset_blocks: %" PRIu64 "\n",
d->disk.name, spdk_bdev_get_name(base_bdev), d->offset_blocks);
vbdev_gpt_base_get_ref(gpt_base, d);
spdk_vbdev_register(&d->disk, &base_bdev, 1);
TAILQ_INSERT_TAIL(&g_gpt_disks, d, tailq);
}
return 0;
@ -423,13 +275,12 @@ 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 = gpt_base->bdev;
struct spdk_bdev *bdev = gpt_base->part_base.bdev;
int rc;
/* free the ch and also close the bdev_desc */
spdk_bdev_free_io(bdev_io);
spdk_put_io_channel(gpt_base->ch);
gpt_base->ch = NULL;
spdk_bdev_free_io(bdev_io);
if (status != SPDK_BDEV_IO_STATUS_SUCCESS) {
SPDK_ERRLOG("Gpt: bdev=%s io error status=%d\n",
@ -443,12 +294,6 @@ spdk_gpt_bdev_complete(struct spdk_bdev_io *bdev_io, bool status, void *arg)
goto end;
}
rc = spdk_bdev_module_claim_bdev(bdev, gpt_base->desc, SPDK_GET_BDEV_MODULE(gpt));
if (rc) {
SPDK_ERRLOG("could not claim bdev %s\n", spdk_bdev_get_name(bdev));
goto end;
}
rc = vbdev_gpt_create_bdevs(gpt_base);
if (rc < 0) {
SPDK_DEBUGLOG(SPDK_TRACE_VBDEV_GPT, "Failed to split dev=%s by gpt table\n",
@ -462,7 +307,7 @@ end:
*/
spdk_bdev_module_examine_done(SPDK_GET_BDEV_MODULE(gpt));
if (gpt_base->ref == 0) {
if (gpt_base->part_base.ref == 0) {
/* If no gpt_disk instances were created, free the base context */
spdk_gpt_base_free(gpt_base);
}
@ -480,8 +325,10 @@ vbdev_gpt_read_gpt(struct spdk_bdev *bdev)
return -1;
}
rc = spdk_bdev_read(gpt_base->desc, gpt_base->ch, gpt_base->gpt.buf, 0, SPDK_GPT_BUFFER_SIZE,
spdk_gpt_bdev_complete, gpt_base);
gpt_base->ch = spdk_bdev_get_io_channel(gpt_base->part_base.desc);
rc = spdk_bdev_read(gpt_base->part_base.desc, gpt_base->ch, gpt_base->gpt.buf, 0,
SPDK_GPT_BUFFER_SIZE, spdk_gpt_bdev_complete, gpt_base);
if (rc < 0) {
spdk_gpt_base_free(gpt_base);
SPDK_ERRLOG("Failed to send bdev_io command\n");
@ -507,11 +354,7 @@ vbdev_gpt_init(void)
static void
vbdev_gpt_fini(void)
{
struct gpt_disk *gpt_disk, *tmp;
TAILQ_FOREACH_SAFE(gpt_disk, &g_gpt_disks, tailq, tmp) {
vbdev_gpt_free(gpt_disk);
}
spdk_bdev_part_tailq_fini(&g_gpt_disks);
}
static void
@ -534,11 +377,7 @@ vbdev_gpt_examine(struct spdk_bdev *bdev)
static int
vbdev_gpt_get_ctx_size(void)
{
/*
* Note: this context is only used for RESET operations, since it is the only
* I/O type that does not just resubmit to the base bdev.
*/
return sizeof(struct spdk_io_channel *);
return 0;
}
SPDK_BDEV_MODULE_REGISTER(gpt, vbdev_gpt_init, vbdev_gpt_fini, NULL,