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bdev/compress: Pass bdev name instead of bdev pointer to _prepare_for_load_init()

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This patch removes the call of spdk_bdev_get_by_name() from
create_compress_bdev() by calling spdk_bdev_open_ext() and then passing
bdev descriptor to _prepare_for_load_init().
vbdev_init_reduce() returns the return code of spdk_bdev_open_ext()
directly if it is error to process the ENODEV case correctly.

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: Ie80ce4104ceaa5726db976e33cd35352d5c91703
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4571
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
This commit is contained in:
Shuhei Matsumoto 2020-10-12 03:16:25 +09:00 committed by Tomasz Zawadzki
parent c3ed33f475
commit aec30063e3
2 changed files with 29 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
module/bdev/compress/vbdev_compress.c
View File

@ -188,7 +188,7 @@ static struct rte_comp_xform g_decomp_xform = {
static void vbdev_compress_examine(struct spdk_bdev *bdev);
static int vbdev_compress_claim(struct vbdev_compress *comp_bdev);
static void vbdev_compress_queue_io(struct spdk_bdev_io *bdev_io);
struct vbdev_compress *_prepare_for_load_init(struct spdk_bdev *bdev, uint32_t lb_size);
struct vbdev_compress *_prepare_for_load_init(struct spdk_bdev_desc *bdev_desc, uint32_t lb_size);
static void vbdev_compress_submit_request(struct spdk_io_channel *ch, struct spdk_bdev_io *bdev_io);
static void comp_bdev_ch_destroy_cb(void *io_device, void *ctx_buf);
static void vbdev_compress_delete_done(void *cb_arg, int bdeverrno);
@ -1302,9 +1302,10 @@ vbdev_compress_base_bdev_event_cb(enum spdk_bdev_event_type type, struct spdk_bd
* information for reducelib to init or load.
*/
struct vbdev_compress *
_prepare_for_load_init(struct spdk_bdev *bdev, uint32_t lb_size)
_prepare_for_load_init(struct spdk_bdev_desc *bdev_desc, uint32_t lb_size)
{
struct vbdev_compress *meta_ctx;
struct spdk_bdev *bdev;
meta_ctx = calloc(1, sizeof(struct vbdev_compress));
if (meta_ctx == NULL) {
@ -1313,13 +1314,16 @@ _prepare_for_load_init(struct spdk_bdev *bdev, uint32_t lb_size)
}
meta_ctx->drv_name = "None";
meta_ctx->base_bdev = bdev;
meta_ctx->backing_dev.unmap = _comp_reduce_unmap;
meta_ctx->backing_dev.readv = _comp_reduce_readv;
meta_ctx->backing_dev.writev = _comp_reduce_writev;
meta_ctx->backing_dev.compress = _comp_reduce_compress;
meta_ctx->backing_dev.decompress = _comp_reduce_decompress;
meta_ctx->base_desc = bdev_desc;
bdev = spdk_bdev_desc_get_bdev(bdev_desc);
meta_ctx->base_bdev = bdev;
meta_ctx->backing_dev.blocklen = bdev->blocklen;
meta_ctx->backing_dev.blockcnt = bdev->blockcnt;
@ -1357,27 +1361,29 @@ _set_pmd(struct vbdev_compress *comp_dev)
/* Call reducelib to initialize a new volume */
static int
vbdev_init_reduce(struct spdk_bdev *bdev, const char *pm_path, uint32_t lb_size)
vbdev_init_reduce(const char *bdev_name, const char *pm_path, uint32_t lb_size)
{
struct spdk_bdev_desc *bdev_desc = NULL;
struct vbdev_compress *meta_ctx;
int rc;
meta_ctx = _prepare_for_load_init(bdev, lb_size);
rc = spdk_bdev_open_ext(bdev_name, true, vbdev_compress_base_bdev_event_cb,
NULL, &bdev_desc);
if (rc) {
SPDK_ERRLOG("could not open bdev %s\n", bdev_name);
return rc;
}
meta_ctx = _prepare_for_load_init(bdev_desc, lb_size);
if (meta_ctx == NULL) {
spdk_bdev_close(bdev_desc);
return -EINVAL;
}
if (_set_pmd(meta_ctx) == false) {
SPDK_ERRLOG("could not find required pmd\n");
free(meta_ctx);
return -EINVAL;
}
rc = spdk_bdev_open_ext(spdk_bdev_get_name(meta_ctx->base_bdev), true,
vbdev_compress_base_bdev_event_cb, NULL, &meta_ctx->base_desc);
if (rc) {
SPDK_ERRLOG("could not open bdev %s\n", spdk_bdev_get_name(meta_ctx->base_bdev));
free(meta_ctx);
spdk_bdev_close(bdev_desc);
return -EINVAL;
}
@ -1496,19 +1502,12 @@ comp_bdev_ch_destroy_cb(void *io_device, void *ctx_buf)
int
create_compress_bdev(const char *bdev_name, const char *pm_path, uint32_t lb_size)
{
struct spdk_bdev *bdev;
bdev = spdk_bdev_get_by_name(bdev_name);
if (!bdev) {
return -ENODEV;
}
if ((lb_size != 0) && (lb_size != LB_SIZE_4K) && (lb_size != LB_SIZE_512B)) {
SPDK_ERRLOG("Logical block size must be 512 or 4096\n");
return -EINVAL;
}
return vbdev_init_reduce(bdev, pm_path, lb_size);
return vbdev_init_reduce(bdev_name, pm_path, lb_size);
}
/* On init, just init the compress drivers. All metadata is stored on disk. */
@ -1825,6 +1824,7 @@ vbdev_reduce_load_cb(void *cb_arg, struct spdk_reduce_vol *vol, int reduce_errno
static void
vbdev_compress_examine(struct spdk_bdev *bdev)
{
struct spdk_bdev_desc *bdev_desc = NULL;
struct vbdev_compress *meta_ctx;
int rc;
@ -1833,17 +1833,17 @@ vbdev_compress_examine(struct spdk_bdev *bdev)
return;
}
meta_ctx = _prepare_for_load_init(bdev, 0);
if (meta_ctx == NULL) {
rc = spdk_bdev_open_ext(spdk_bdev_get_name(bdev), false,
vbdev_compress_base_bdev_event_cb, NULL, &bdev_desc);
if (rc) {
SPDK_ERRLOG("could not open bdev %s\n", spdk_bdev_get_name(bdev));
spdk_bdev_module_examine_done(&compress_if);
return;
}
rc = spdk_bdev_open_ext(spdk_bdev_get_name(meta_ctx->base_bdev), false,
vbdev_compress_base_bdev_event_cb, NULL, &meta_ctx->base_desc);
if (rc) {
SPDK_ERRLOG("could not open bdev %s\n", spdk_bdev_get_name(meta_ctx->base_bdev));
free(meta_ctx);
meta_ctx = _prepare_for_load_init(bdev_desc, 0);
if (meta_ctx == NULL) {
spdk_bdev_close(bdev_desc);
spdk_bdev_module_examine_done(&compress_if);
return;
}

1
test/unit/lib/bdev/compress.c/compress_ut.c
View File

@ -277,6 +277,7 @@ DEFINE_STUB_V(spdk_bdev_unregister, (struct spdk_bdev *bdev, spdk_bdev_unregiste
DEFINE_STUB(spdk_bdev_open_ext, int, (const char *bdev_name, bool write,
spdk_bdev_event_cb_t event_cb,
void *event_ctx, struct spdk_bdev_desc **_desc), 0);
DEFINE_STUB(spdk_bdev_desc_get_bdev, struct spdk_bdev *, (struct spdk_bdev_desc *desc), NULL);
DEFINE_STUB(spdk_bdev_module_claim_bdev, int, (struct spdk_bdev *bdev, struct spdk_bdev_desc *desc,
struct spdk_bdev_module *module), 0);
DEFINE_STUB_V(spdk_bdev_module_examine_done, (struct spdk_bdev_module *module));