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bdev: add allowlist to bdev layer

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When set bdev_auto_examine to false, the bdev layer will only
examine a device if it is in the allowlist. Currently the allowlist
is always empty. Will add api to add bdev to the allowlist in the
future.

Signed-off-by: Peng Yu <yupeng0921@gmail.com>
Change-Id: Iee7597623e7dd4172acc88736d23e0e5a4a2b03e
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/3101
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
yupeng 2020-06-27 07:06:28 +00:00 committed by Tomasz Zawadzki
parent 30ee8137cf
commit cb619b5229
1 changed files with 68 additions and 34 deletions
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102
lib/bdev/bdev.c
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@ -403,12 +403,40 @@ spdk_bdev_set_opts(struct spdk_bdev_opts *opts)
return 0;
}
/*
* Will implement the whitelist in the furture
*/
struct spdk_bdev_examine_item {
char *name;
TAILQ_ENTRY(spdk_bdev_examine_item) link;
};
TAILQ_HEAD(spdk_bdev_examine_allowlist, spdk_bdev_examine_item);
struct spdk_bdev_examine_allowlist g_bdev_examine_allowlist = TAILQ_HEAD_INITIALIZER(
g_bdev_examine_allowlist);
static inline bool
bdev_in_examine_whitelist(struct spdk_bdev *bdev)
bdev_examine_allowlist_check(const char *name)
{
struct spdk_bdev_examine_item *item;
TAILQ_FOREACH(item, &g_bdev_examine_allowlist, link) {
if (strcmp(name, item->name) == 0) {
return true;
}
}
return false;
}
static inline bool
bdev_in_examine_allowlist(struct spdk_bdev *bdev)
{
struct spdk_bdev_alias *tmp;
if (bdev_examine_allowlist_check(bdev->name)) {
return true;
}
TAILQ_FOREACH(tmp, &bdev->aliases, tailq) {
if (bdev_examine_allowlist_check(tmp->alias)) {
return true;
}
}
return false;
}
@ -418,7 +446,41 @@ bdev_ok_to_examine(struct spdk_bdev *bdev)
if (g_bdev_opts.bdev_auto_examine) {
return true;
} else {
return bdev_in_examine_whitelist(bdev);
return bdev_in_examine_allowlist(bdev);
}
}
static void
bdev_examine(struct spdk_bdev *bdev)
{
struct spdk_bdev_module *module;
uint32_t action;
TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
if (module->examine_config && bdev_ok_to_examine(bdev)) {
action = module->internal.action_in_progress;
module->internal.action_in_progress++;
module->examine_config(bdev);
if (action != module->internal.action_in_progress) {
SPDK_ERRLOG("examine_config for module %s did not call spdk_bdev_module_examine_done()\n",
module->name);
}
}
}
if (bdev->internal.claim_module && bdev_ok_to_examine(bdev)) {
if (bdev->internal.claim_module->examine_disk) {
bdev->internal.claim_module->internal.action_in_progress++;
bdev->internal.claim_module->examine_disk(bdev);
}
return;
}
TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
if (module->examine_disk && bdev_ok_to_examine(bdev)) {
module->internal.action_in_progress++;
module->examine_disk(bdev);
}
}
}
@ -5309,39 +5371,11 @@ bdev_fini(struct spdk_bdev *bdev)
static void
bdev_start(struct spdk_bdev *bdev)
{
struct spdk_bdev_module *module;
uint32_t action;
SPDK_DEBUGLOG(SPDK_LOG_BDEV, "Inserting bdev %s into list\n", bdev->name);
TAILQ_INSERT_TAIL(&g_bdev_mgr.bdevs, bdev, internal.link);
/* Examine configuration before initializing I/O */
TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
if (module->examine_config && bdev_ok_to_examine(bdev)) {
action = module->internal.action_in_progress;
module->internal.action_in_progress++;
module->examine_config(bdev);
if (action != module->internal.action_in_progress) {
SPDK_ERRLOG("examine_config for module %s did not call spdk_bdev_module_examine_done()\n",
module->name);
}
}
}
if (bdev->internal.claim_module && bdev_ok_to_examine(bdev)) {
if (bdev->internal.claim_module->examine_disk) {
bdev->internal.claim_module->internal.action_in_progress++;
bdev->internal.claim_module->examine_disk(bdev);
}
return;
}
TAILQ_FOREACH(module, &g_bdev_mgr.bdev_modules, internal.tailq) {
if (module->examine_disk && bdev_ok_to_examine(bdev)) {
module->internal.action_in_progress++;
module->examine_disk(bdev);
}
}
bdev_examine(bdev);
}
int