Merge tag 'for-5.9/drivers-20200803' of git://git.kernel.dk/linux-block

Pull block driver updates from Jens Axboe:

 - NVMe:
      - ZNS support (Aravind, Keith, Matias, Niklas)
      - Misc cleanups, optimizations, fixes (Baolin, Chaitanya, David,
        Dongli, Max, Sagi)

 - null_blk zone capacity support (Aravind)

 - MD:
      - raid5/6 fixes (ChangSyun)
      - Warning fixes (Damien)
      - raid5 stripe fixes (Guoqing, Song, Yufen)
      - sysfs deadlock fix (Junxiao)
      - raid10 deadlock fix (Vitaly)

 - struct_size conversions (Gustavo)

 - Set of bcache updates/fixes (Coly)

* tag 'for-5.9/drivers-20200803' of git://git.kernel.dk/linux-block: (117 commits)
  md/raid5: Allow degraded raid6 to do rmw
  md/raid5: Fix Force reconstruct-write io stuck in degraded raid5
  raid5: don't duplicate code for different paths in handle_stripe
  raid5-cache: hold spinlock instead of mutex in r5c_journal_mode_show
  md: print errno in super_written
  md/raid5: remove the redundant setting of STRIPE_HANDLE
  md: register new md sysfs file 'uuid' read-only
  md: fix max sectors calculation for super 1.0
  nvme-loop: remove extra variable in create ctrl
  nvme-loop: set ctrl state connecting after init
  nvme-multipath: do not fall back to __nvme_find_path() for non-optimized paths
  nvme-multipath: fix logic for non-optimized paths
  nvme-rdma: fix controller reset hang during traffic
  nvme-tcp: fix controller reset hang during traffic
  nvmet: introduce the passthru Kconfig option
  nvmet: introduce the passthru configfs interface
  nvmet: Add passthru enable/disable helpers
  nvmet: add passthru code to process commands
  nvme: export nvme_find_get_ns() and nvme_put_ns()
  nvme: introduce nvme_ctrl_get_by_path()
  ...

6 files changed, 227 insertions, 18 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 06ecb2c1492f..9273d1126ed2 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -513,6 +513,8 @@ struct request_queue {
 	unsigned int		nr_zones;
 	unsigned long		*conv_zones_bitmap;
 	unsigned long		*seq_zones_wlock;
+	unsigned int		max_open_zones;
+	unsigned int		max_active_zones;
 #endif /* CONFIG_BLK_DEV_ZONED */
 
 	/*
@@ -722,6 +724,28 @@ static inline bool blk_queue_zone_is_seq(struct request_queue *q,
 		return true;
 	return !test_bit(blk_queue_zone_no(q, sector), q->conv_zones_bitmap);
 }
+
+static inline void blk_queue_max_open_zones(struct request_queue *q,
+		unsigned int max_open_zones)
+{
+	q->max_open_zones = max_open_zones;
+}
+
+static inline unsigned int queue_max_open_zones(const struct request_queue *q)
+{
+	return q->max_open_zones;
+}
+
+static inline void blk_queue_max_active_zones(struct request_queue *q,
+		unsigned int max_active_zones)
+{
+	q->max_active_zones = max_active_zones;
+}
+
+static inline unsigned int queue_max_active_zones(const struct request_queue *q)
+{
+	return q->max_active_zones;
+}
 #else /* CONFIG_BLK_DEV_ZONED */
 static inline unsigned int blk_queue_nr_zones(struct request_queue *q)
 {
@@ -737,6 +761,14 @@ static inline unsigned int blk_queue_zone_no(struct request_queue *q,
 {
 	return 0;
 }
+static inline unsigned int queue_max_open_zones(const struct request_queue *q)
+{
+	return 0;
+}
+static inline unsigned int queue_max_active_zones(const struct request_queue *q)
+{
+	return 0;
+}
 #endif /* CONFIG_BLK_DEV_ZONED */
 
 static inline bool rq_is_sync(struct request *rq)
@@ -1520,6 +1552,24 @@ static inline sector_t bdev_zone_sectors(struct block_device *bdev)
 	return 0;
 }
 
+static inline unsigned int bdev_max_open_zones(struct block_device *bdev)
+{
+	struct request_queue *q = bdev_get_queue(bdev);
+
+	if (q)
+		return queue_max_open_zones(q);
+	return 0;
+}
+
+static inline unsigned int bdev_max_active_zones(struct block_device *bdev)
+{
+	struct request_queue *q = bdev_get_queue(bdev);
+
+	if (q)
+		return queue_max_active_zones(q);
+	return 0;
+}
+
 static inline int queue_dma_alignment(const struct request_queue *q)
 {
 	return q ? q->dma_alignment : 511;
diff --git a/include/linux/nvme-fc-driver.h b/include/linux/nvme-fc-driver.h
index 41e7795a3ee4..2a38f2b477a5 100644
--- a/include/linux/nvme-fc-driver.h
+++ b/include/linux/nvme-fc-driver.h
@@ -672,7 +672,7 @@ enum {
  * Values set by the LLDD indicating completion status of the FCP operation.
  * Must be set prior to calling the done() callback.
  * @transferred_length: amount of DATA_OUT payload data received by a
- *            a WRITEDATA operation. If not a WRITEDATA operation, value must
+ *            WRITEDATA operation. If not a WRITEDATA operation, value must
  *            be set to 0. Should equal transfer_length on success.
  * @fcp_error: status of the FCP operation. Must be 0 on success; on failure
  *            must be a NVME_SC_FC_xxxx value.
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 5ce51ab4c50e..d92535997687 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -132,6 +132,7 @@ enum {
 #define NVME_CAP_TIMEOUT(cap)	(((cap) >> 24) & 0xff)
 #define NVME_CAP_STRIDE(cap)	(((cap) >> 32) & 0xf)
 #define NVME_CAP_NSSRC(cap)	(((cap) >> 36) & 0x1)
+#define NVME_CAP_CSS(cap)	(((cap) >> 37) & 0xff)
 #define NVME_CAP_MPSMIN(cap)	(((cap) >> 48) & 0xf)
 #define NVME_CAP_MPSMAX(cap)	(((cap) >> 52) & 0xf)
 
@@ -162,7 +163,6 @@ enum {
 
 enum {
 	NVME_CC_ENABLE		= 1 << 0,
-	NVME_CC_CSS_NVM		= 0 << 4,
 	NVME_CC_EN_SHIFT	= 0,
 	NVME_CC_CSS_SHIFT	= 4,
 	NVME_CC_MPS_SHIFT	= 7,
@@ -170,6 +170,9 @@ enum {
 	NVME_CC_SHN_SHIFT	= 14,
 	NVME_CC_IOSQES_SHIFT	= 16,
 	NVME_CC_IOCQES_SHIFT	= 20,
+	NVME_CC_CSS_NVM		= 0 << NVME_CC_CSS_SHIFT,
+	NVME_CC_CSS_CSI		= 6 << NVME_CC_CSS_SHIFT,
+	NVME_CC_CSS_MASK	= 7 << NVME_CC_CSS_SHIFT,
 	NVME_CC_AMS_RR		= 0 << NVME_CC_AMS_SHIFT,
 	NVME_CC_AMS_WRRU	= 1 << NVME_CC_AMS_SHIFT,
 	NVME_CC_AMS_VS		= 7 << NVME_CC_AMS_SHIFT,
@@ -179,6 +182,8 @@ enum {
 	NVME_CC_SHN_MASK	= 3 << NVME_CC_SHN_SHIFT,
 	NVME_CC_IOSQES		= NVME_NVM_IOSQES << NVME_CC_IOSQES_SHIFT,
 	NVME_CC_IOCQES		= NVME_NVM_IOCQES << NVME_CC_IOCQES_SHIFT,
+	NVME_CAP_CSS_NVM	= 1 << 0,
+	NVME_CAP_CSS_CSI	= 1 << 6,
 	NVME_CSTS_RDY		= 1 << 0,
 	NVME_CSTS_CFS		= 1 << 1,
 	NVME_CSTS_NSSRO		= 1 << 4,
@@ -307,6 +312,7 @@ enum {
 	NVME_CTRL_ONCS_WRITE_UNCORRECTABLE	= 1 << 1,
 	NVME_CTRL_ONCS_DSM			= 1 << 2,
 	NVME_CTRL_ONCS_WRITE_ZEROES		= 1 << 3,
+	NVME_CTRL_ONCS_RESERVATIONS		= 1 << 5,
 	NVME_CTRL_ONCS_TIMESTAMP		= 1 << 6,
 	NVME_CTRL_VWC_PRESENT			= 1 << 0,
 	NVME_CTRL_OACS_SEC_SUPP                 = 1 << 0,
@@ -369,11 +375,37 @@ struct nvme_id_ns {
 	__u8			vs[3712];
 };
 
+struct nvme_zns_lbafe {
+	__le64			zsze;
+	__u8			zdes;
+	__u8			rsvd9[7];
+};
+
+struct nvme_id_ns_zns {
+	__le16			zoc;
+	__le16			ozcs;
+	__le32			mar;
+	__le32			mor;
+	__le32			rrl;
+	__le32			frl;
+	__u8			rsvd20[2796];
+	struct nvme_zns_lbafe	lbafe[16];
+	__u8			rsvd3072[768];
+	__u8			vs[256];
+};
+
+struct nvme_id_ctrl_zns {
+	__u8	zasl;
+	__u8	rsvd1[4095];
+};
+
 enum {
 	NVME_ID_CNS_NS			= 0x00,
 	NVME_ID_CNS_CTRL		= 0x01,
 	NVME_ID_CNS_NS_ACTIVE_LIST	= 0x02,
 	NVME_ID_CNS_NS_DESC_LIST	= 0x03,
+	NVME_ID_CNS_CS_NS		= 0x05,
+	NVME_ID_CNS_CS_CTRL		= 0x06,
 	NVME_ID_CNS_NS_PRESENT_LIST	= 0x10,
 	NVME_ID_CNS_NS_PRESENT		= 0x11,
 	NVME_ID_CNS_CTRL_NS_LIST	= 0x12,
@@ -384,6 +416,11 @@ enum {
 };
 
 enum {
+	NVME_CSI_NVM			= 0,
+	NVME_CSI_ZNS			= 2,
+};
+
+enum {
 	NVME_DIR_IDENTIFY		= 0x00,
 	NVME_DIR_STREAMS		= 0x01,
 	NVME_DIR_SND_ID_OP_ENABLE	= 0x01,
@@ -435,11 +472,13 @@ struct nvme_ns_id_desc {
 #define NVME_NIDT_EUI64_LEN	8
 #define NVME_NIDT_NGUID_LEN	16
 #define NVME_NIDT_UUID_LEN	16
+#define NVME_NIDT_CSI_LEN	1
 
 enum {
 	NVME_NIDT_EUI64		= 0x01,
 	NVME_NIDT_NGUID		= 0x02,
 	NVME_NIDT_UUID		= 0x03,
+	NVME_NIDT_CSI		= 0x04,
 };
 
 struct nvme_smart_log {
@@ -519,6 +558,27 @@ struct nvme_ana_rsp_hdr {
 	__le16	rsvd10[3];
 };
 
+struct nvme_zone_descriptor {
+	__u8		zt;
+	__u8		zs;
+	__u8		za;
+	__u8		rsvd3[5];
+	__le64		zcap;
+	__le64		zslba;
+	__le64		wp;
+	__u8		rsvd32[32];
+};
+
+enum {
+	NVME_ZONE_TYPE_SEQWRITE_REQ	= 0x2,
+};
+
+struct nvme_zone_report {
+	__le64		nr_zones;
+	__u8		resv8[56];
+	struct nvme_zone_descriptor entries[];
+};
+
 enum {
 	NVME_SMART_CRIT_SPARE		= 1 << 0,
 	NVME_SMART_CRIT_TEMPERATURE	= 1 << 1,
@@ -613,6 +673,9 @@ enum nvme_opcode {
 	nvme_cmd_resv_report	= 0x0e,
 	nvme_cmd_resv_acquire	= 0x11,
 	nvme_cmd_resv_release	= 0x15,
+	nvme_cmd_zone_mgmt_send	= 0x79,
+	nvme_cmd_zone_mgmt_recv	= 0x7a,
+	nvme_cmd_zone_append	= 0x7d,
 };
 
 #define nvme_opcode_name(opcode)	{ opcode, #opcode }
@@ -751,6 +814,7 @@ struct nvme_rw_command {
 enum {
 	NVME_RW_LR			= 1 << 15,
 	NVME_RW_FUA			= 1 << 14,
+	NVME_RW_APPEND_PIREMAP		= 1 << 9,
 	NVME_RW_DSM_FREQ_UNSPEC		= 0,
 	NVME_RW_DSM_FREQ_TYPICAL	= 1,
 	NVME_RW_DSM_FREQ_RARE		= 2,
@@ -816,6 +880,53 @@ struct nvme_write_zeroes_cmd {
 	__le16			appmask;
 };
 
+enum nvme_zone_mgmt_action {
+	NVME_ZONE_CLOSE		= 0x1,
+	NVME_ZONE_FINISH	= 0x2,
+	NVME_ZONE_OPEN		= 0x3,
+	NVME_ZONE_RESET		= 0x4,
+	NVME_ZONE_OFFLINE	= 0x5,
+	NVME_ZONE_SET_DESC_EXT	= 0x10,
+};
+
+struct nvme_zone_mgmt_send_cmd {
+	__u8			opcode;
+	__u8			flags;
+	__u16			command_id;
+	__le32			nsid;
+	__le32			cdw2[2];
+	__le64			metadata;
+	union nvme_data_ptr	dptr;
+	__le64			slba;
+	__le32			cdw12;
+	__u8			zsa;
+	__u8			select_all;
+	__u8			rsvd13[2];
+	__le32			cdw14[2];
+};
+
+struct nvme_zone_mgmt_recv_cmd {
+	__u8			opcode;
+	__u8			flags;
+	__u16			command_id;
+	__le32			nsid;
+	__le64			rsvd2[2];
+	union nvme_data_ptr	dptr;
+	__le64			slba;
+	__le32			numd;
+	__u8			zra;
+	__u8			zrasf;
+	__u8			pr;
+	__u8			rsvd13;
+	__le32			cdw14[2];
+};
+
+enum {
+	NVME_ZRA_ZONE_REPORT		= 0,
+	NVME_ZRASF_ZONE_REPORT_ALL	= 0,
+	NVME_REPORT_ZONE_PARTIAL	= 1,
+};
+
 /* Features */
 
 enum {
@@ -872,6 +983,7 @@ enum nvme_admin_opcode {
 	nvme_admin_security_recv	= 0x82,
 	nvme_admin_sanitize_nvm		= 0x84,
 	nvme_admin_get_lba_status	= 0x86,
+	nvme_admin_vendor_start		= 0xC0,
 };
 
 #define nvme_admin_opcode_name(opcode)	{ opcode, #opcode }
@@ -935,6 +1047,8 @@ enum {
 	NVME_FEAT_RESV_MASK	= 0x82,
 	NVME_FEAT_RESV_PERSIST	= 0x83,
 	NVME_FEAT_WRITE_PROTECT	= 0x84,
+	NVME_FEAT_VENDOR_START	= 0xC0,
+	NVME_FEAT_VENDOR_END	= 0xFF,
 	NVME_LOG_ERROR		= 0x01,
 	NVME_LOG_SMART		= 0x02,
 	NVME_LOG_FW_SLOT	= 0x03,
@@ -972,7 +1086,9 @@ struct nvme_identify {
 	__u8			cns;
 	__u8			rsvd3;
 	__le16			ctrlid;
-	__u32			rsvd11[5];
+	__u8			rsvd11[3];
+	__u8			csi;
+	__u32			rsvd12[4];
 };
 
 #define NVME_IDENTIFY_DATA_SIZE 4096
@@ -1086,7 +1202,9 @@ struct nvme_get_log_page_command {
 		};
 		__le64 lpo;
 	};
-	__u32			rsvd14[2];
+	__u8			rsvd14[3];
+	__u8			csi;
+	__u32			rsvd15;
 };
 
 struct nvme_directive_cmd {
@@ -1283,6 +1401,8 @@ struct nvme_command {
 		struct nvme_format_cmd format;
 		struct nvme_dsm_cmd dsm;
 		struct nvme_write_zeroes_cmd write_zeroes;
+		struct nvme_zone_mgmt_send_cmd zms;
+		struct nvme_zone_mgmt_recv_cmd zmr;
 		struct nvme_abort_cmd abort;
 		struct nvme_get_log_page_command get_log_page;
 		struct nvmf_common_command fabrics;
@@ -1417,6 +1537,18 @@ enum {
 	NVME_SC_AUTH_REQUIRED		= 0x191,
 
 	/*
+	 * I/O Command Set Specific - Zoned commands:
+	 */
+	NVME_SC_ZONE_BOUNDARY_ERROR	= 0x1b8,
+	NVME_SC_ZONE_FULL		= 0x1b9,
+	NVME_SC_ZONE_READ_ONLY		= 0x1ba,
+	NVME_SC_ZONE_OFFLINE		= 0x1bb,
+	NVME_SC_ZONE_INVALID_WRITE	= 0x1bc,
+	NVME_SC_ZONE_TOO_MANY_ACTIVE	= 0x1bd,
+	NVME_SC_ZONE_TOO_MANY_OPEN	= 0x1be,
+	NVME_SC_ZONE_INVALID_TRANSITION	= 0x1bf,
+
+	/*
 	 * Media and Data Integrity Errors:
 	 */
 	NVME_SC_WRITE_FAULT		= 0x280,
diff --git a/include/uapi/linux/bcache.h b/include/uapi/linux/bcache.h
index 9a1965c6c3d0..52e8bcb33981 100644
--- a/include/uapi/linux/bcache.h
+++ b/include/uapi/linux/bcache.h
@@ -141,11 +141,13 @@ static inline struct bkey *bkey_idx(const struct bkey *k, unsigned int nr_keys)
  * Version 3: Cache device with new UUID format
  * Version 4: Backing device with data offset
  */
-#define BCACHE_SB_VERSION_CDEV		0
-#define BCACHE_SB_VERSION_BDEV		1
-#define BCACHE_SB_VERSION_CDEV_WITH_UUID 3
-#define BCACHE_SB_VERSION_BDEV_WITH_OFFSET 4
-#define BCACHE_SB_MAX_VERSION		4
+#define BCACHE_SB_VERSION_CDEV			0
+#define BCACHE_SB_VERSION_BDEV			1
+#define BCACHE_SB_VERSION_CDEV_WITH_UUID	3
+#define BCACHE_SB_VERSION_BDEV_WITH_OFFSET	4
+#define BCACHE_SB_VERSION_CDEV_WITH_FEATURES	5
+#define BCACHE_SB_VERSION_BDEV_WITH_FEATURES	6
+#define BCACHE_SB_MAX_VERSION			6
 
 #define SB_SECTOR			8
 #define SB_OFFSET			(SB_SECTOR << SECTOR_SHIFT)
@@ -173,7 +175,12 @@ struct cache_sb_disk {
 
 	__le64			flags;
 	__le64			seq;
-	__le64			pad[8];
+
+	__le64			feature_compat;
+	__le64			feature_incompat;
+	__le64			feature_ro_compat;
+
+	__le64			pad[5];
 
 	union {
 	struct {
@@ -206,10 +213,16 @@ struct cache_sb_disk {
 		__le16		keys;
 	};
 	__le64			d[SB_JOURNAL_BUCKETS];	/* journal buckets */
+	__le16			bucket_size_hi;
 };
 
+/*
+ * This is for in-memory bcache super block.
+ * NOTE: cache_sb is NOT exactly mapping to cache_sb_disk, the member
+ *       size, ordering and even whole struct size may be different
+ *       from cache_sb_disk.
+ */
 struct cache_sb {
-	__u64			csum;
 	__u64			offset;	/* sector where this sb was written */
 	__u64			version;
 
@@ -224,7 +237,10 @@ struct cache_sb {
 
 	__u64			flags;
 	__u64			seq;
-	__u64			pad[8];
+
+	__u64			feature_compat;
+	__u64			feature_incompat;
+	__u64			feature_ro_compat;
 
 	union {
 	struct {
@@ -232,10 +248,9 @@ struct cache_sb {
 		__u64		nbuckets;	/* device size */
 
 		__u16		block_size;	/* sectors */
-		__u16		bucket_size;	/* sectors */
-
 		__u16		nr_in_set;
 		__u16		nr_this_dev;
+		__u32		bucket_size;	/* sectors */
 	};
 	struct {
 		/* Backing devices */
@@ -262,7 +277,8 @@ struct cache_sb {
 static inline _Bool SB_IS_BDEV(const struct cache_sb *sb)
 {
 	return sb->version == BCACHE_SB_VERSION_BDEV
-		|| sb->version == BCACHE_SB_VERSION_BDEV_WITH_OFFSET;
+		|| sb->version == BCACHE_SB_VERSION_BDEV_WITH_OFFSET
+		|| sb->version == BCACHE_SB_VERSION_BDEV_WITH_FEATURES;
 }
 
 BITMASK(CACHE_SYNC,			struct cache_sb, flags, 0, 1);
diff --git a/include/uapi/linux/blkzoned.h b/include/uapi/linux/blkzoned.h
index 0cdef67135f0..42c3366cc25f 100644
--- a/include/uapi/linux/blkzoned.h
+++ b/include/uapi/linux/blkzoned.h
@@ -74,6 +74,15 @@ enum blk_zone_cond {
 };
 
 /**
+ * enum blk_zone_report_flags - Feature flags of reported zone descriptors.
+ *
+ * @BLK_ZONE_REP_CAPACITY: Zone descriptor has capacity field.
+ */
+enum blk_zone_report_flags {
+	BLK_ZONE_REP_CAPACITY	= (1 << 0),
+};
+
+/**
  * struct blk_zone - Zone descriptor for BLKREPORTZONE ioctl.
  *
  * @start: Zone start in 512 B sector units
@@ -99,7 +108,9 @@ struct blk_zone {
 	__u8	cond;		/* Zone condition */
 	__u8	non_seq;	/* Non-sequential write resources active */
 	__u8	reset;		/* Reset write pointer recommended */
-	__u8	reserved[36];
+	__u8	resv[4];
+	__u64	capacity;	/* Zone capacity in number of sectors */
+	__u8	reserved[24];
 };
 
 /**
@@ -115,7 +126,7 @@ struct blk_zone {
 struct blk_zone_report {
 	__u64		sector;
 	__u32		nr_zones;
-	__u8		reserved[4];
+	__u32		flags;
 	struct blk_zone zones[0];
 };
 
diff --git a/include/uapi/linux/raid/md_p.h b/include/uapi/linux/raid/md_p.h
index 1f2d8c81f0e0..e5a98a16f9b0 100644
--- a/include/uapi/linux/raid/md_p.h
+++ b/include/uapi/linux/raid/md_p.h
@@ -123,7 +123,7 @@ typedef struct mdp_device_descriptor_s {
 
 /*
  * Notes:
- * - if an array is being reshaped (restriped) in order to change the
+ * - if an array is being reshaped (restriped) in order to change
  *   the number of active devices in the array, 'raid_disks' will be
  *   the larger of the old and new numbers.  'delta_disks' will
  *   be the "new - old".  So if +ve, raid_disks is the new value, and