Merge tag 'for-5.20/block-2022-08-04' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:

 - NVMe pull requests via Christoph:
      - add support for In-Band authentication (Hannes Reinecke)
      - handle the persistent internal error AER (Michael Kelley)
      - use in-capsule data for TCP I/O queue connect (Caleb Sander)
      - remove timeout for getting RDMA-CM established event (Israel
        Rukshin)
      - misc cleanups (Joel Granados, Sagi Grimberg, Chaitanya Kulkarni,
        Guixin Liu, Xiang wangx)
      - use command_id instead of req->tag in trace_nvme_complete_rq()
        (Bean Huo)
      - various fixes for the new authentication code (Lukas Bulwahn,
        Dan Carpenter, Colin Ian King, Chaitanya Kulkarni, Hannes
        Reinecke)
      - small cleanups (Liu Song, Christoph Hellwig)
      - restore compat_ioctl support (Nick Bowler)
      - make a nvmet-tcp workqueue lockdep-safe (Sagi Grimberg)
      - enable generic interface (/dev/ngXnY) for unknown command sets
        (Joel Granados, Christoph Hellwig)
      - don't always build constants.o (Christoph Hellwig)
      - print the command name of aborted commands (Christoph Hellwig)

 - MD pull requests via Song:
      - Improve raid5 lock contention, by Logan Gunthorpe.
      - Misc fixes to raid5, by Logan Gunthorpe.
      - Fix race condition with md_reap_sync_thread(), by Guoqing Jiang.
      - Fix potential deadlock with raid5_quiesce and
        raid5_get_active_stripe, by Logan Gunthorpe.
      - Refactoring md_alloc(), by Christoph"
      - Fix md disk_name lifetime problems, by Christoph Hellwig
      - Convert prepare_to_wait() to wait_woken() api, by Logan
        Gunthorpe;
      - Fix sectors_to_do bitmap issue, by Logan Gunthorpe.

 - Work on unifying the null_blk module parameters and configfs API
   (Vincent)

 - drbd bitmap IO error fix (Lars)

 - Set of rnbd fixes (Guoqing, Md Haris)

 - Remove experimental marker on bcache async device registration (Coly)

 - Series from cleaning up the bio splitting (Christoph)

 - Removal of the sx8 block driver. This hardware never really
   widespread, and it didn't receive a lot of attention after the
   initial merge of it back in 2005 (Christoph)

 - A few fixes for s390 dasd (Eric, Jiang)

 - Followup set of fixes for ublk (Ming)

 - Support for UBLK_IO_NEED_GET_DATA for ublk (ZiyangZhang)

 - Fixes for the dio dma alignment (Keith)

 - Misc fixes and cleanups (Ming, Yu, Dan, Christophe

* tag 'for-5.20/block-2022-08-04' of git://git.kernel.dk/linux-block: (136 commits)
  s390/dasd: Establish DMA alignment
  s390/dasd: drop unexpected word 'for' in comments
  ublk_drv: add support for UBLK_IO_NEED_GET_DATA
  ublk_cmd.h: add one new ublk command: UBLK_IO_NEED_GET_DATA
  ublk_drv: cleanup ublksrv_ctrl_dev_info
  ublk_drv: add SET_PARAMS/GET_PARAMS control command
  ublk_drv: fix ublk device leak in case that add_disk fails
  ublk_drv: cancel device even though disk isn't up
  block: fix leaking page ref on truncated direct io
  block: ensure bio_iov_add_page can't fail
  block: ensure iov_iter advances for added pages
  drivers:md:fix a potential use-after-free bug
  md/raid5: Ensure batch_last is released before sleeping for quiesce
  md/raid5: Move stripe_request_ctx up
  md/raid5: Drop unnecessary call to r5c_check_stripe_cache_usage()
  md/raid5: Make is_inactive_blocked() helper
  md/raid5: Refactor raid5_get_active_stripe()
  block: pass struct queue_limits to the bio splitting helpers
  block: move bio_allowed_max_sectors to blk-merge.c
  block: move the call to get_max_io_size out of blk_bio_segment_split
  ...

1 files changed, 136 insertions, 0 deletions

diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index ff77c3d2354f..2bcd60758919 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -11,6 +11,11 @@
 #include <linux/ctype.h>
 #include <linux/pci.h>
 #include <linux/pci-p2pdma.h>
+#ifdef CONFIG_NVME_TARGET_AUTH
+#include <linux/nvme-auth.h>
+#endif
+#include <crypto/hash.h>
+#include <crypto/kpp.h>
 
 #include "nvmet.h"
 
@@ -1680,10 +1685,133 @@ static const struct config_item_type nvmet_ports_type = {
 static struct config_group nvmet_subsystems_group;
 static struct config_group nvmet_ports_group;
 
+#ifdef CONFIG_NVME_TARGET_AUTH
+static ssize_t nvmet_host_dhchap_key_show(struct config_item *item,
+		char *page)
+{
+	u8 *dhchap_secret = to_host(item)->dhchap_secret;
+
+	if (!dhchap_secret)
+		return sprintf(page, "\n");
+	return sprintf(page, "%s\n", dhchap_secret);
+}
+
+static ssize_t nvmet_host_dhchap_key_store(struct config_item *item,
+		const char *page, size_t count)
+{
+	struct nvmet_host *host = to_host(item);
+	int ret;
+
+	ret = nvmet_auth_set_key(host, page, false);
+	/*
+	 * Re-authentication is a soft state, so keep the
+	 * current authentication valid until the host
+	 * requests re-authentication.
+	 */
+	return ret < 0 ? ret : count;
+}
+
+CONFIGFS_ATTR(nvmet_host_, dhchap_key);
+
+static ssize_t nvmet_host_dhchap_ctrl_key_show(struct config_item *item,
+		char *page)
+{
+	u8 *dhchap_secret = to_host(item)->dhchap_ctrl_secret;
+
+	if (!dhchap_secret)
+		return sprintf(page, "\n");
+	return sprintf(page, "%s\n", dhchap_secret);
+}
+
+static ssize_t nvmet_host_dhchap_ctrl_key_store(struct config_item *item,
+		const char *page, size_t count)
+{
+	struct nvmet_host *host = to_host(item);
+	int ret;
+
+	ret = nvmet_auth_set_key(host, page, true);
+	/*
+	 * Re-authentication is a soft state, so keep the
+	 * current authentication valid until the host
+	 * requests re-authentication.
+	 */
+	return ret < 0 ? ret : count;
+}
+
+CONFIGFS_ATTR(nvmet_host_, dhchap_ctrl_key);
+
+static ssize_t nvmet_host_dhchap_hash_show(struct config_item *item,
+		char *page)
+{
+	struct nvmet_host *host = to_host(item);
+	const char *hash_name = nvme_auth_hmac_name(host->dhchap_hash_id);
+
+	return sprintf(page, "%s\n", hash_name ? hash_name : "none");
+}
+
+static ssize_t nvmet_host_dhchap_hash_store(struct config_item *item,
+		const char *page, size_t count)
+{
+	struct nvmet_host *host = to_host(item);
+	u8 hmac_id;
+
+	hmac_id = nvme_auth_hmac_id(page);
+	if (hmac_id == NVME_AUTH_HASH_INVALID)
+		return -EINVAL;
+	if (!crypto_has_shash(nvme_auth_hmac_name(hmac_id), 0, 0))
+		return -ENOTSUPP;
+	host->dhchap_hash_id = hmac_id;
+	return count;
+}
+
+CONFIGFS_ATTR(nvmet_host_, dhchap_hash);
+
+static ssize_t nvmet_host_dhchap_dhgroup_show(struct config_item *item,
+		char *page)
+{
+	struct nvmet_host *host = to_host(item);
+	const char *dhgroup = nvme_auth_dhgroup_name(host->dhchap_dhgroup_id);
+
+	return sprintf(page, "%s\n", dhgroup ? dhgroup : "none");
+}
+
+static ssize_t nvmet_host_dhchap_dhgroup_store(struct config_item *item,
+		const char *page, size_t count)
+{
+	struct nvmet_host *host = to_host(item);
+	int dhgroup_id;
+
+	dhgroup_id = nvme_auth_dhgroup_id(page);
+	if (dhgroup_id == NVME_AUTH_DHGROUP_INVALID)
+		return -EINVAL;
+	if (dhgroup_id != NVME_AUTH_DHGROUP_NULL) {
+		const char *kpp = nvme_auth_dhgroup_kpp(dhgroup_id);
+
+		if (!crypto_has_kpp(kpp, 0, 0))
+			return -EINVAL;
+	}
+	host->dhchap_dhgroup_id = dhgroup_id;
+	return count;
+}
+
+CONFIGFS_ATTR(nvmet_host_, dhchap_dhgroup);
+
+static struct configfs_attribute *nvmet_host_attrs[] = {
+	&nvmet_host_attr_dhchap_key,
+	&nvmet_host_attr_dhchap_ctrl_key,
+	&nvmet_host_attr_dhchap_hash,
+	&nvmet_host_attr_dhchap_dhgroup,
+	NULL,
+};
+#endif /* CONFIG_NVME_TARGET_AUTH */
+
 static void nvmet_host_release(struct config_item *item)
 {
 	struct nvmet_host *host = to_host(item);
 
+#ifdef CONFIG_NVME_TARGET_AUTH
+	kfree(host->dhchap_secret);
+#endif
 	kfree(host);
 }
 
@@ -1693,6 +1821,9 @@ static struct configfs_item_operations nvmet_host_item_ops = {
 
 static const struct config_item_type nvmet_host_type = {
 	.ct_item_ops		= &nvmet_host_item_ops,
+#ifdef CONFIG_NVME_TARGET_AUTH
+	.ct_attrs		= nvmet_host_attrs,
+#endif
 	.ct_owner		= THIS_MODULE,
 };
 
@@ -1705,6 +1836,11 @@ static struct config_group *nvmet_hosts_make_group(struct config_group *group,
 	if (!host)
 		return ERR_PTR(-ENOMEM);
 
+#ifdef CONFIG_NVME_TARGET_AUTH
+	/* Default to SHA256 */
+	host->dhchap_hash_id = NVME_AUTH_HASH_SHA256;
+#endif
+
 	config_group_init_type_name(&host->group, name, &nvmet_host_type);
 
 	return &host->group;